Liquid crystal display device
First Claim
Patent Images
1. A liquid crystal display device being characterized in that on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which generates an electric field between said reference electrode and said pixel electrode are mounted in each pixel region, said video signals from said drain signal line are generated by a driver chip mounted on said one substrate, a light transmittivity of the liquid crystal layer is set to take a minimum value when a voltage is not applied between said pixel electrode and said reference electrode, and a maximum amplitude of voltage of said video signals is set to a value not more than a voltage necessary for setting a relative transmittivity of said liquid crystal layer to 90%.
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Abstract
A liquid crystal display device can suppress the local temperature elevation of a liquid crystal in the vicinity of drivers. On a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via the switching element, and a reference electrode which generates an electric field between the reference electrode and the pixel electrode are mounted on each pixel region of the liquid-crystal-side surface. The video signals from the drain signal line are generated by a driver chip mounted on one substrate. A light transmittivity of the liquid crystal layer is set to take a minimum value when a voltage is not applied between the pixel electrode and the reference electrode. A maximum amplitude of voltage of the video signals is set to a value not more than a voltage necessary for setting a relative transmittivity of the liquid crystal layer to 90%.
32 Citations
87 Claims
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1. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which generates an electric field between said reference electrode and said pixel electrode are mounted in each pixel region, said video signals from said drain signal line are generated by a driver chip mounted on said one substrate, a light transmittivity of the liquid crystal layer is set to take a minimum value when a voltage is not applied between said pixel electrode and said reference electrode, and a maximum amplitude of voltage of said video signals is set to a value not more than a voltage necessary for setting a relative transmittivity of said liquid crystal layer to 90%.
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2. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode to which reference signals which become the reference to said video said video signals are supplied are mounted in each pixel region, and reference signals which are supplied to said reference electrodes in said each pixel region are inverted by a unit of a frame.
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3. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode to which reference signals which become the reference to said video said video signals are supplied are mounted in each pixel region, said video signals from said drain signal line are generated by a driver chip mounted on said one substrate, and out of said drain signal line and said reference signal line, one of said signal lines to which signals having a larger average voltage amplitude per 1 frame are supplied is set to have a lower resistance than the other of said signal lines.
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6. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which generates an electric field between said reference electrode and said pixel electrode are mounted in each pixel region, said video signals from said drain signal line are generated by a driver chip mounted on said one substrate, and a stress buffer layer is interposed between said driver chip and said one substrate.
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7. A liquid crystal display device, wherein a protective film which is made of an organic film and covers said switching element is formed on each pixel region and said stress buffer layer is made of material identical to material of said protective film.
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8. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which generates an electric field between said reference electrode and said pixel electrode are mounted in each pixel region, said signals from respective signal lines are generated by a driver chip mounted on said one substrate, and said one substrate is made of resin material.
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9. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which generates an electric field between said reference electrode and said pixel electrode are mounted in each pixel region, said signals from said respective signal lines are generated by a driver chip mounted on said one substrate, support columns which ensure a gap formed between said one substrate and the other substrate which faces said one substrate in an oppose manner is mounted on a liquid-crystal-side surface of either one of said respective substrates, and said support columns are arranged with the density of one or less per two neighboring pixel regions.
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10. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which generates an electric field between said reference electrode and said pixel electrode are mounted in each pixel region, said signals from said respective signal lines are generated by a driver chip mounted on said one substrate, support columns which ensure a gap formed between said one substrate and the other substrate which faces said one substrate in an oppose manner is mounted on a liquid-crystal-side surface of either one of said respective substrates, and said support columns are formed such that said one support column is allocated to neighboring two to eight pixel regions.
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11. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which generates an electric field between said reference electrode and said pixel electrode are mounted in each pixel region, said signals from said respective signal lines are generated by a driver chip mounted on said one substrate, support columns which ensure a gap formed between said one substrate and the other substrate which faces said one substrate in an oppose manner and a light shielding film which defines said pixel region are mounted on a liquid-crystal-side surface of either one of said respective substrates, and said light shielding film has a width thereof set wider at a portion thereof which is close to said drive chip than other portions thereof.
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12. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a plurality of reference electrodes which generate an electric field between said reference electrode and said pixel electrode are mounted in each pixel region, and one of said respective reference electrodes is formed in a superposed manner on said drain signal line via an insulation film and has a width thereof set larger than a width of said drain signal line.
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13. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a plurality of reference electrodes which generate an electric field between said reference electrodes and said pixel electrode are mounted in each pixel region, and one of said respective reference electrodes is formed in a superposed manner on said drain signal line via an insulation film having a dielectric constant lower than a dielectric constant of inorganic material and has a width thereof set larger than a width of said drain signal line.
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14. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a plurality of reference electrodes which generate an electric field between said reference electrode and said pixel electrode are mounted in each pixel region, and at least one of said respective reference electrodes is formed in a superposed manner on said drain signal line via an insulation film made of a sequential laminated body consisting of an inorganic material layer and an organic material layer and has a width thereof set larger than a width of said drain signal line.
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15. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a plurality of reference electrodes which generate an electric field between said reference electrode and said pixel electrode are mounted in each pixel region, and said respective reference electrodes are made of metal layers and at least one of said respective reference electrodes is formed in a superposed manner on said drain signal line via an insulation film made of a sequential laminated body consisting of an inorganic material layer and an organic material layer and has a width thereof set larger than a width of said drain signal line.
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19. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a plurality of reference electrodes which generate an electric field between said reference electrode and said pixel electrode are mounted in each pixel region, said liquid crystal is set to have a minimum light transmittivity in the state that said electric field is not generated between said pixel electrode and said reference electrode, and said respective reference electrodes are made of transparent conductive layers and at least one of said respective reference electrodes is formed in a superposed manner on said drain signal line via an insulation film made of a sequential laminated body consisting of an inorganic material layer and an organic material layer and has a width thereof set larger than a width of said drain signal line.
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22. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which is arranged in a spaced-apart manner from said pixel electrode and to which reference signals from a reference signal line are supplied are mounted in each pixel region, said reference signal line is formed on a lower layer of an insulation film made of a sequential laminated body consisting of an inorganic material layer and an organic material layer, said reference electrode is formed on an upper layer of said insulation film and said reference signal line and said reference electrode are connected to each other via a through hole formed in said insulation film, and said reference electrode is made of a light-transmitting transparent conductive layer and said reference signal line is made of a conductive layer having a resistance lower than a resistance of said reference electrode.
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23. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which is arranged in a spaced-apart manner from said pixel electrode and to which reference signals from a reference signal line are supplied are mounted in each pixel region, and said gate signal line, said drain signal line and said reference electrode are respectively formed as layers which are different from each other via insulation films.
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24. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a holding capacity signal line which forms a capacity between said holding capacity signal line and said pixel electrode are mounted in each pixel region, and said gate signal line, said drain signal line and said holding capacity signal line are respectively formed as layers which are different from each other via insulation films.
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25. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which is arranged in a spaced-apart manner from said pixel electrode and to which reference signals from a reference signal line are supplied are mounted in each pixel region, said video signals from said drain signal line are generated by a driver chip mounted on one of said substrates, and said gate signal line, said drain signal line and said reference electrode are respectively formed as layers which are different from each other via insulation films.
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26. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a holding capacity signal line which forms a capacity between said holding capacity signal line and said pixel electrode are mounted in each pixel region, said video signals from said drain signal line are generated by a driver chip mounted on one of said substrates, and said gate signal line, said drain signal line and said holding capacity signal line are respectively formed as layers which are different from each other via insulation films.
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27. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which is arranged in a spaced-apart manner from said pixel electrode and to which reference signals from a reference signal line are supplied are mounted in each pixel region, said reference electrode is formed on an upper layer of said reference signal line by an insulation film and has a first strip-like portion which is superposed at least along said reference signal line and a second strip-like portion which is extended such that said second strip-like portion intersects said first strip-like portion, and said reference electrode is connected with said reference signal line via a through hole formed in said insulation film at an intersecting portion between said first and second strip-like portions.
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28. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which is arranged in a spaced-apart manner from said pixel electrode and to which reference signals from a reference signal line are supplied are mounted in each pixel region, said reference electrode is formed on an upper layer of said reference signal line by an insulation film and has a strip-like portion which is extended such that said strip-like portion intersects at least said reference signal line, said reference electrode has a width thereof set wider at portion thereof which intersects said reference signal line than other portions thereof, and said reference electrode is connected with said reference signal line via a through hole formed in said insulation film at said portion where said width of said reference electrode is set wider.
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29. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which is arranged in a spaced-apart manner from said pixel electrode and to which reference signals from a reference signal line are supplied are mounted in each pixel region, said reference electrode is made of opaque conductive material formed on an upper layer of said reference signal line by an insulation film and has a first strip-like portion which is superposed at least along said reference signal line and has a width thereof set narrower than a width of said reference signal line and a second strip-like portion which is extended such that said second strip-like portion intersects said first strip-like portion, and said reference electrode is connected with said reference signal line via a through hole formed in said insulation film at an intersecting portion between said first and second strip-like portions.
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30. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which is arranged in a spaced-apart manner from said pixel electrode and to which reference signals from a reference signal line are supplied are mounted in each pixel region, said reference electrode is formed as a layer disposed above said gate signal line and said drain signal line via an insulation film, a conductive layer which is integrally formed with a conductive layer which is superposed on at least said gate signal line and is superposed along said drain signal line is formed as a portion of said reference electrode, and said conductive layer which is superposed on said gate signal line forms an aperture at least in a portion thereof which faces said switching element in an opposed manner.
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31. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which is arranged in a spaced-apart manner from said pixel electrode and to which reference signals from a reference signal line are supplied are mounted in each pixel region, said reference electrode is formed as a layer disposed above said gate signal line and said drain signal line via an insulation film, a conductive layer which is integrally formed with a conductive layer which is superposed along at least said gate signal line and is superposed along said drain signal line is formed as a portion of said reference electrode, and said conductive layer which is superposed on said gate signal line forms an aperture in a portion thereof which faces said switching element in an opposed manner, and said aperture is formed such that said aperture is extended toward said drain signal line side along said gate signal line, and a portion of said drain signal line is formed such that said portion faces said aperture in an opposed manner.
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32. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which is arranged in a spaced-apart manner from said pixel electrode and to which reference signals from a reference signal line are supplied are mounted in each pixel region, said reference electrode is formed as a layer disposed above said gate signal line and said drain signal line via an insulation film, and a conductive layer which is integrally formed with a conductive layer which is superposed along at least said gate signal line and is superposed along said drain signal line is formed as a portion of said reference electrode, and an aperture of said conductive layer formed between said reference electrode and other reference electrode arranged close to said reference electrode is formed such that said aperture extends over a region where said switching element is formed.
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34. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a wiring layer, a first insulation film which is made of SiN and also covers said wiring layer, a second insulation film which is made of SiN having a density lower than a density of said first insulation film and is formed on said first insulation film and a third insulation film which is made of organic material and is formed on said second insulation film are mounted, and a through hole which penetrates said insulation films from said third insulation film to said said first insulation film and exposes a portion of said wiring layer is formed, and a SiO2 film is formed on side walls of said first insulation film and said second insulation film in said through hole.
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35. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a wiring layer, a first insulation film which is made of inorganic material and also covers said wiring layer, a second insulation film which is made of inorganic material having a density lower than a density of said first insulation film and is formed on said first insulation film and a third insulation film which is made of organic material and is formed on said second insulation film are mounted, and a through hole which penetrates said insulation films from said third insulation film to said first insulation film and exposes a portion of said wiring layer is formed, and said third insulation film is formed on side walls of said first insulation film and said second insulation film in said through hole.
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36. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a wiring layer, a laminated body which is made of a plurality of insulation films and also covers said wiring layer are mounted, and a through hole which exposes a portion of said wiring layer is formed in said laminated body, a first conductive layer which is connected to said wiring layer via said through hole is formed on a surface of at least one of a plurality of said insulation films except for said insulation film which constitutes an uppermost layer, and a second conductive layer which is connected to said first conductive layer via said through hole is formed on a surface of said laminated body.
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38. A liquid crystal display device being characterized in that
to each one of pixel regions which are arranged in a matrix array on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which is arranged in a spaced-apart manner from said pixel electrode and to which reference signals from a reference signal line are supplied are provided, said reference electrode of each pixel region is constituted such that said reference signals are supplied via a conductive layer which is formed as the same layer as said reference electrode and from said reference signal line which is formed as the layer different from said reference electrode via a through hole, and said through hole is formed in said pixel region which corresponds to G (green color).
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39. A liquid crystal display device being characterized in that
to each one of pixel regions on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which is arranged in a spaced-apart manner from said pixel electrode and to which reference signals from a reference signal line are supplied are provided, said reference electrode is connected to said reference signal line which is formed in a layer different from said reference electrode via an insulation layer via a through hole formed in said insulation layer, and said through hole is formed in a shape which is flared in the extending direction of said reference signal line.
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40. A liquid crystal display device being characterized in that
to each one of pixel regions on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which is arranged in a spaced-apart manner from said pixel electrode and to which reference signals from a reference signal line are supplied are provided, as said reference electrode, an electrode which is formed in the direction which intersects said reference signal line via an insulation film and is connected to said reference signal line via a through hole is provided, and as said pixel electrodes, pixel electrodes which are positioned at both sides of said reference electrode which is connected to said reference signal line by said through hole are provided, and said pixel electrodes have extension portions which are extended in the direction away from said through hole on said reference signal line.
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42. A liquid crystal display device being characterized in that
to each one of pixel regions on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which generates an electric field between said reference electrode and said pixel electrode are provided, said reference electrode is positioned as a layer disposed above said gate signal line, said switching element, said drain signal line and said pixel electrode and is constituted of a portion of a conductive layer which is formed on said gate signal line and said drain signal line in a superposed manner, and the supply of reference signals to said reference electrode is performed via said conductive layer.
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43. A liquid crystal display device being characterized in that
to each one of pixel regions on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which generates an electric field between said reference electrode and said pixel electrode are provided, said reference electrode is positioned as a layer disposed above said gate signal line, said switching element, said drain signal line and said pixel electrode and is constituted of a portion of a conductive layer which is formed on said gate signal line and said drain signal line in a superposed manner, and said reference electrode is superposed on said pixel electrode at a portion of said conductive layer which intersects said reference electrode.
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46. A liquid crystal display device being characterized in that
to each one of pixel regions on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which generates an electric field between said reference electrode and said pixel electrode are provided, said gate signal line, said pixel electrode and said reference electrode are formed as respectively different layers from said one substrate side, an extension portion of said pixel electrode is superposed on a portion of said gate signal line via a first insulation film and is simultaneously superposed on said extension portion of said reference electrode via a second insulation film, and said extension portion of said reference electrode forms a portion which covers said gate signal line.
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52. A liquid crystal display device being characterized in that
to each one of pixel regions formed on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which generates an electric field between said reference electrode and said pixel electrode are provided, said pixel electrode and said reference electrode respectively have bent portions relative to the extension directions thereof for making the directions of electric fields formed between said pixel electrodes and between said reference electrodes different from each other, and said gate signal line, said pixel electrode and said reference electrode are formed as respectively different layers from said one substrate side.
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53. A liquid crystal display device being characterized in that
to each one of pixel regions formed on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which generates an electric field between said reference electrode and said pixel electrode are provided, said pixel electrode and said reference electrode respectively have bent portions relative to the extension directions thereof for making the directions of electric fields formed between said pixel electrodes and between said reference electrodes different from each other, said gate signal line, said pixel electrode and said reference electrode are formed as respectively different layers from said one substrate side, an extension portion of said pixel electrode is superposed on a portion of said gate signal line via a first insulation film, and said extension portion of said pixel electrode is superposed on an extension portion of said reference electrode via a second insulation film, and said extension portion of said reference electrode constitutes a portion which covers said gate signal line.
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57. A liquid crystal display device being characterized in that
to each one of pixel regions formed on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which generates an electric field between said reference electrode and said pixel electrode are provided, said reference electrode is positioned as a layer disposed above said switching element and a conductive layer which is integrally formed with said reference electrode is formed such that said conductive layer covers said switching element, and said reference electrode is driven within a range of potential other than a potential for turning on or off said switching element.
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59. A liquid crystal display device being characterized in that to each one of pixel regions formed on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween,
a thin film transistor which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said thin film transistor, and a reference electrode which generates an electric field between said reference electrode and said pixel electrode are provided, said reference electrode is positioned as a layer disposed above said thin film transistor and a conductive layer which is integrally formed with said reference electrode is formed such that said conductive layer covers said thin film transistor, and a potential of said reference voltage is inverted every one frame and a minimum value thereof is set to not less than − - 5 V.
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60. A liquid crystal display device being characterized in that
to each one of pixel regions formed on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a thin film transistor which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said thin film transistor, and a reference electrode which generates an electric field between said reference electrode and said pixel electrode are provided, said reference electrode is positioned as a layer disposed above said thin film transistor and a conductive layer which is integrally formed with said reference electrode is formed such that said conductive layer covers said thin film transistor, and a potential of said reference electrode is maintained substantially constant and is set within a range from not less than − - 5 V to not more than +10 V.
- View Dependent Claims (61)
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62. A liquid crystal display device being characterized in that
to a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a plurality of first signal lines which are extended in one direction and are arranged in parallel in the direction which intersects said one direction at a right angle and second signal lines each of which is arranged between said first signal lines and in parallel with said first signal lines are provided, said each first signal line and neighboring first signal lines are formed into a group and one ends of respective grouped first signal lines are converged to each other and are connected to a bump of a semiconductor chip, said second signal lines are formed such that said second signal lines are extended to a region where said first signal lines are converged and are pulled out by other wiring layer, and said second signal lines are formed as a layer different from said respective first signal lines via an insulation film and said wiring layer is extended in the direction which intersects said one direction at a right angle.
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64. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, respective regions which are surrounded by gate signal lines which are extended in the x direction and are arranged in parallel in the y direction and drain signal lines which are extended in the y direction and are arranged in parallel in the x direction are formed as said pixel regions, a switching element which is operated in response to the supply of scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which is connected to a reference signal line running in parallel to said gate signal line in the inside of said pixel region and generates an electric field between said reference electrode and said pixel electrode are provided to said each pixel region, said reference electrode is formed as a layer different from said gate signal line, said drain signal line and said reference signal line via an insulation film and is formed such that said reference electrode is connected with said reference electrode of other neighboring pixel electrode, said gate signal line and neighboring gate signal lines which are disposed via said reference electrode are formed into a group and one ends of respective grouped gate signal lines are converged to each other and are connected to an output bump of a semiconductor chip, said reference signal lines are formed such that said signal lines are extended to a region where said gate signal lines are converged and are pulled out by other wiring layer, and said other wiring layer is extended in the y direction and is integrally formed with said reference signal line.
-
66. A liquid crystal display device being characterized in that
on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, respective regions which are surrounded by gate signal lines which are extended in the x direction and are arranged in parallel in the y direction and drain signal lines which are extended in the y direction and are arranged in parallel in the x direction are formed as said pixel regions, a switching element which is operated in response to the supply of scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which is connected to a reference signal line running in parallel to said gate signal line in the inside of said pixel region and generates an electric field between said reference electrode and said pixel electrode are provided to said each pixel region, said reference electrode is formed as a layer different from said gate signal, said drain signal line and said reference signal line via an insulation film and is formed such that said reference electrode is connected with said reference electrode of other neighboring pixel electrode, said gate signal line and neighboring gate signal lines which are disposed via said reference electrode are formed into a group and one ends of respective grouped gate signal lines are converged and are connected to a bump of a semiconductor chip each other, and among said reference signal lines, every several other signal lines which are arranged in the x direction are extended to a region where said gate signal lines are converged and are pulled out by other wiring layer,.
-
69. A liquid crystal display device being characterized in that orientation films are formed on respective liquid-crystal-side surfaces of respective substrates which face each other in an opposed manner while sandwiching a liquid crystal therebetween, and said orientation films has a structural formula expressed by a following formula (1).
-
(1)
-
-
70. A liquid crystal display device being characterized in that orientation films are formed on respective liquid-crystal-side surfaces of respective substrates which face each other in an opposed manner while sandwiching a liquid crystal therebetween, and said orientation films has a structural formula expressed by a following formula (2).
-
(2)
-
-
71. A liquid crystal display device being characterized in that orientation films are formed on respective liquid-crystal-side surfaces of respective substrates which face each other in an opposed manner while sandwiching a liquid crystal therebetween, and, in said respective orientation films, materials having structural formulae expressed by following formulae (1), (2) are contained such that said substance of said formula (1) amounts to 30% to 70% for the sum of said material expressed by said formula (1) and said material expressed by said formula (2).
-
(2)
-
-
72. A liquid crystal display device being characterized in that on a liquid-crystal-side surface of one substrate out of respective substrates which face each other in an opposed manner while sandwiching a liquid crystal therebetween, an insulation film made of organic material, an electrode and an orientation film are sequentially formed, and
a film thickness of said electrode is set to not more than 200 nm.
-
73. A liquid crystal display device being characterized in that on a liquid-crystal-side surface of one substrate out of respective substrates which face each other in an opposed manner while sandwiching a liquid crystal therebetween, an insulation film made of organic material, an electrode and an orientation film are sequentially formed, and
said electrode has at least a portion thereof positioned in a recessed portion formed in said insulation film.
-
75. A liquid crystal display device being characterized in that on a liquid-crystal-side surface of one substrate out of respective substrates which face each other in an opposed 32wmanner while sandwiching a liquid crystal therebetween, a first insulation film made of organic material, an electrode, a second insulation film and an orientation film are sequentially formed,
said electrode has at least a portion thereof positioned in a recessed portion formed in said first insulation film, and assuming a film thickness of said electrode as H, a height of a step of said electrode relative to said second insulation in the state that said step is exposed on a surface as Hi, a following formula (3) is established. 0≦ - (H−
H1)/H≦
0.5
(3)
- (H−
-
76. A liquid crystal display device being characterized in that on a liquid-crystal-side surface of one substrate out of respective substrates which face each other in an opposed manner while sandwiching a liquid crystal therebetween, a wiring layer, an insulation film made of organic material, an electrode which intersects said wiring layer, and an orientation film are sequentially formed, and
said electrode has portions thereof other than a portion thereof which intersects said wiring layer positioned in a recessed portion formed in said insulation layer.
-
77. A liquid crystal display device being characterized in that =p1 to each pixel region on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween,
a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which generates an electric field between said reference electrode and said pixel electrode are provided, said liquid crystal is set to have a minimum light transmittivity in the state that said electric field is not generated between said pixel electrode and said reference electrode, said reference electrode is formed on a protective film which covers said switching element, and said protective film is constituted of a sequential laminated body made of an inorganic material layer and an organic material layer, and said liquid crystal includes at least one of cyano di-fluorine liquid crystal or trifluoro dioxane liquid crystal as a component thereof.
-
78. A liquid crystal display device being characterized in that
to each pixel region on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which generates an electric field between said reference electrode and said pixel electrode are provided, said liquid crystal is set to have a minimum light transmittivity in the state that said electric field is not generated between said pixel electrode and said reference electrode, said reference electrode is formed via a protective film which is constituted of a sequential laminated body made of said pixel electrode, an inorganic material layer and an organic material layer, and an amplitude of an output voltage of video signals to said drain signal line is set to not more than 7.5 V at one side thereof.
-
79. A liquid crystal display device being characterized in that
to each pixel region on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which generates an electric field between said reference electrode and said pixel electrode are provided, said liquid crystal is set to have a minimum light transmittivity in the state that said electric field is not generated between said pixel electrode and said reference electrode, said reference electrode is formed via a protective film which is constituted of a sequential laminated body made of said pixel electrode, an inorganic material layer and an organic material layer, assuming a film thickness (μ - m)of a protective film PSV2 made of organic material as d, a distance (μ
m) between a pixel electrode Px and a reference electrode CT as W and a dielectric anisotropy of a liquid crystal as Δ
ε
, said d, W and Δ
ε
are set such that Vmax expressed by a following formula (4) becomes smaller than 15 V,Vmax=1.9d+0.4146W−
0.2328Δ
ε
+2.8218
(4)the supply of reference signals to said reference electrode is inverted every frame, and an amplitude of an output voltage of video signals to said drain signal line is set to not more than 7.5 V at one side thereof.
- m)of a protective film PSV2 made of organic material as d, a distance (μ
-
80. A liquid crystal display device being characterized in that
to each pixel region on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which generates an electric field between said reference electrode and said pixel electrode are provided, said liquid crystal is set to have a minimum light transmittivity in the state that said electric field is not generated between said pixel electrode and said reference electrode, said reference electrode is formed via a protective film which is constituted of a sequential laminated body made of said pixel electrode, an inorganic material layer and an organic material layer, assuming a film thickness (μ - m)of a protective film PSV2 made of organic material as d, a distance (μ
m) between a pixel electrode Px and a reference electrode CT as W and a dielectric anisotropy of a liquid crystal as Δ
ε
, said d, W and Δ
ε
are set such that Vmax expressed by a following formula (4) becomes smaller than 7.5 V,Vmax=1.9d+0.4146W−
0.2328Δ
ε
+2.8218
(4),and an amplitude of an output voltage of video signals to said drain signal line is set to not more than 7.5 V at one side thereof.
- m)of a protective film PSV2 made of organic material as d, a distance (μ
-
81. A liquid crystal display device being characterized in that
to each pixel region on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which generates an electric field between said reference electrode and said pixel electrode are provided, said liquid crystal is set to have a minimum light transmittivity in the state that said electric field is not generated between said pixel electrode and said reference electrode, said reference electrode is formed via a protective film which is constituted of a sequential laminated body made of said pixel electrode, an inorganic material layer and an organic material layer, assuming a film thickness (μ - m)of a protective film PSV2 made of organic material as d, a distance (μ
m) between a pixel electrode Px and a reference electrode CT as W and a dielectric anisotropy of a liquid crystal as Δ
ε
, said d, W and Δ
ε
are set such that Vmax expressed by a following formula (4) becomes smaller than 9.375 V,Vmax=1.9d+0.4146W−
0.2328Δ
ε
+2.8218
(4),and a relative transmittivity of a liquid crystal layer at a maximum output voltage of said video signals to said drain signal line is set to not more than 90%.
- m)of a protective film PSV2 made of organic material as d, a distance (μ
-
82. A liquid crystal display device being characterized in that
to each pixel region on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which generates an electric field between said reference electrode and said pixel electrode are provided, said liquid crystal is set to have a minimum light transmittivity in the state that said electric field is not generated between said pixel electrode and said reference electrode, said reference electrode is formed via a protective film which is constituted of a sequential laminated body made of said pixel electrode, an inorganic material layer and an organic material layer, the supply of reference signals to said reference electrode is inverted every frame, assuming a film thickness (μ - m)of a protective film PSV2 made of organic material as d, a distance (μ
m) between a pixel electrode Px and a reference electrode CT as W and a dielectric anisotropy of a liquid crystal as Δ
ε
, said d, W and Δ
ε
are set such that Vmax expressed by a following formula (4) becomes smaller than 18.75 V,Vmax=1.9d +0.4146W−
0.2328Δ
ε
+2.8218
(4),and a relative transmittivity of a liquid crystal layer at a maximum output voltage of said video signals to said drain signal line is set to not more than 90%.
- m)of a protective film PSV2 made of organic material as d, a distance (μ
-
83. A liquid crystal display device being characterized in that
to each pixel region on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which generates an electric field between said reference electrode and said pixel electrode are provided, the supply of said video signals from said drain signal line is performed by a driver chip mounted on one substrate, said liquid crystal is set to have a minimum light transmittivity in the state that said electric field is not generated between said pixel electrode and said reference electrode, said reference electrode is formed via a protective film which is constituted of a sequential laminated body made of said pixel electrode, an inorganic material layer and an organic material layer, and an amplitude of an output voltage of video signals to said drain signal line is set to not more than 5V at one side thereof.
-
84. A liquid crystal display device being characterized in that
to each pixel region on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which generates an electric field between said reference electrode and said pixel electrode are provided, the supply of said video signal from said drain signal line is performed by a driver chip mounted on one substrate, said liquid crystal is set to have a minimum light transmittivity in the state that said electric field is not generated between said pixel electrode and said reference electrode, said reference electrode is formed via a protective film which is constituted of a sequential laminated body made of said pixel electrode, an inorganic material layer and an organic material layer, assuming a film thickness (μ - m) of a protective film PSV2 made of organic material as d, a distance (μ
m) between a pixel electrode Px and a reference electrode CT as W and a dielectric anisotropy of a liquid crystal as Δ
ε
, said d, W and Δ
ε
are set such that Vmax expressed by a following formula (4) becomes smaller than 10 V,Vmax=1.9d+0.4146W−
0.2328Δ
ε
+2.8218
(4)the supply of reference signals to said reference electrode is inverted every frame, and an amplitude of an output voltage of video signals to said drain signal line is set to not more than 5 V at one side thereof.
- m) of a protective film PSV2 made of organic material as d, a distance (μ
-
85. A liquid crystal display device being characterized in that
to each pixel region on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which generates an electric field between said reference electrode and said pixel electrode are provided, the supply of said video signal from said drain signal line is performed by a driver chip mounted on one substrate, said liquid crystal is set to have a minimum light transmittivity in the state that said electric field is not generated between said pixel electrode and said reference electrode, said reference electrode is formed via a protective film which is constituted of a sequential laminated body made of said pixel electrode, an inorganic material layer and an organic material layer, assuming a film thickness (μ - m)of a protective film PSV2 made of organic material as d, a distance (μ
m) between a pixel electrode Px and a reference electrode CT as W and a dielectric anisotropy of a liquid crystal as Δ
ε
, said d, W and Δ
ε
are set such that Vmax expressed by a following formula (4) becomes smaller than 5 V,Vmax=1.9d+0.4146W−
0.2328Δ
ε
+2.8218
(4)the supply of reference signals to said reference electrode is inverted every frame, and an amplitude of an output voltage of video signals to said drain signal line is set to not more than 5 V at one side thereof.
- m)of a protective film PSV2 made of organic material as d, a distance (μ
-
86. A liquid crystal display device being characterized in that
to each pixel region on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which generates an electric field between said reference electrode and said pixel electrode are provided, the supply of said video signal from said drain signal line is performed by a driver chip mounted on one substrate, said liquid crystal is set to have a minimum light transmittivity in the state that said electric field is not generated between said pixel electrode and said reference electrode, said reference electrode is formed via a protective film which is constituted of a sequential laminated body made of said pixel electrode, an inorganic material layer and an organic material layer, assuming a film thickness (μ - m)of a protective film PSV2 made of organic material as d, a distance (μ
m) between a pixel electrode Px and a reference electrode CT as W and a dielectric anisotropy of a liquid crystal as Δ
ε
, said d, W and Δ
ε
are set such that Vmax expressed by a following formula (4) becomes smaller than 6.25 V,Vmax=1.9d+0.4146W−
0.2328Δ
ε
+2.8218
(4),and the relative transmittivity of a liquid crystal layer at a maximum output voltage of said video signals to said drain signal line is set to not more than 90%.
- m)of a protective film PSV2 made of organic material as d, a distance (μ
-
87. A liquid crystal display device being characterized in that
to each pixel region on a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via said switching element, and a reference electrode which generates an electric field between said reference electrode and said pixel electrode are provided, the supply of said video signal from said drain signal line is performed by a driver chip mounted on one substrate, said liquid crystal is set to have a minimum light transmittivity in the state that said electric field is not generated between said pixel electrode and said reference electrode, said reference electrode is formed via a protective film which is constituted of a sequential laminated body made of said pixel electrode, an inorganic material layer and an organic material layer, assuming a film thickness (μ - m)of a protective film PSV2 made of organic material as d, a distance (μ
m) between a pixel electrode Px and a reference electrode CT as W and a dielectric anisotropy of a liquid crystal as Δ
ε
, said d, W and Δ
ε
are set such that Vmax expressed by a following formula (4) becomes smaller than 12.5 V,Vmax=1.9d+0.4146W−
0.2328Δ
ε
+2.8218
(4)the supply of reference signals to said reference electrode is inverted every frame, and the relative transmittivity of a liquid crystal layer at a maximum output voltage of said video signals to said drain signal line is set to not more than 90%.
- m)of a protective film PSV2 made of organic material as d, a distance (μ
Specification
-
- Resources
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Current AssigneePanasonic Liquid Crystal Display Company Limited (Panasonic Holdings Corporation)
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Original AssigneeHitachi, Ltd.
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InventorsIwakabe, Yasushi, Yanagawa, Kazuhiko, Kobayashi, Setsuo, Kondo, Katsumi, Nakayoshi, Yoshiaki, Kurahashi, Nagatoshi
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Granted Patent
-
Time in Patent OfficeDays
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Field of Search
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US Class Current345/87
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CPC Class CodesG02F 1/134363 for applying an electric fi...G02F 1/1345 Conductors connecting elect...G02F 1/13452 Conductors connecting drive...G09G 3/3648 using an active matrix G09G...
