Transflective liquid crystal display device and color liquid crystal display device
First Claim
Patent Images
1. A transflective liquid crystal display device comprising:
- a plurality of pixels; and
vertical alignment liquid crystal which is sealed between a first substrate having a first electrode and a second substrate having a second electrode, wherein each pixel region comprises a reflective region and a transmissive region;
the reflective region comprises a gap adjusting section, on at least one of sides of the first substrate and the second substrate, which sets a gap defined by a thickness of the liquid crystal layer which controls a phase difference of light incident to the liquid crystal layer so that the gap is smaller in the reflective region than in the transmissive region, and the pixel region comprises an alignment controller which divides an alignment direction of the liquid crystal within the pixel region on at least one of the sides of the first substrate and the second substrate.
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Abstract
A vertical alignment liquid crystal layer is sealed between a first substrate having a first electrode and a second substrate having a second electrode, each pixel region has a reflective region and a transmissive region, and a gap adjusting section is provided on one of sides of the first substrate and the second substrate which sets a thickness (gap) d of the liquid crystal layer which controls a phase difference of incident light to the liquid crystal layer so that a gap dr in the reflective region is smaller than a gap dt in the transmissive region. An alignment controller which divides alignment of the liquid crystal within a pixel region is provided in the pixel region on at least one of the sides of the first substrate and the second substrate. It is also possible to optimize by changing the gap in red, green, and blue.
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Citations
46 Claims
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1. A transflective liquid crystal display device comprising:
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a plurality of pixels; and
vertical alignment liquid crystal which is sealed between a first substrate having a first electrode and a second substrate having a second electrode, wherein each pixel region comprises a reflective region and a transmissive region;
the reflective region comprises a gap adjusting section, on at least one of sides of the first substrate and the second substrate, which sets a gap defined by a thickness of the liquid crystal layer which controls a phase difference of light incident to the liquid crystal layer so that the gap is smaller in the reflective region than in the transmissive region, and the pixel region comprises an alignment controller which divides an alignment direction of the liquid crystal within the pixel region on at least one of the sides of the first substrate and the second substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A transflective liquid crystal display device comprising:
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a plurality of pixels; and
vertical alignment liquid crystal which is sealed between a first substrate having a first electrode and a second substrate having a second electrode, wherein each pixel region comprises a reflective region and a transmissive region;
the reflective region comprises a gap adjusting section, on at least one of sides of the first substrate and the second substrate, which sets a gap defined by a thickness of the liquid crystal layer which controls a phase difference of light incident to the liquid crystal layer so that the gap is smaller in the reflective region than in the transmissive region;
the pixel region comprises an alignment controller which divides an alignment direction of the liquid crystal within the pixel region on at least one of the sides of the first substrate and the second substrate; and
an angular difference between an alignment direction of the liquid crystal controlled by the alignment controller in the pixel region and an alignment direction of the liquid crystal controlled by another alignment controller having a projection line which intersects a projection line of the alignment controller onto a plane of the substrate is less than 90 degrees. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A transflective liquid crystal display device comprising:
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a plurality of pixels; and
vertical alignment liquid crystal which is sealed between a first substrate having a first electrode and a second substrate having a second electrode, wherein each pixel region comprises a reflective region and a transmissive region;
a gap adjusting section which sets a gap defined by a thickness of the liquid crystal layer which controls a phase difference of light incident to the liquid crystal layer so that the gap is smaller in the reflective region than in the transmissive region is provided on at least one of sides of the first substrate and the second substrate; and
a side surface of the gap adjusting section has a forward tapered shape in which a width increases toward the substrate on which the gap adjusting section is formed. - View Dependent Claims (27)
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28. A vertical alignment liquid crystal display device having pixels for red, green, and blue for displaying three primary colors of red, green, and blue, the vertical alignment liquid crystal display device comprising:
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a first substrate on which a pixel electrode is formed for each pixel;
a second substrate which is placed opposing the first substrate and which has a common electrode;
liquid crystal which is sealed between the first substrate and the second substrate and which has a negative dielectric constant anisotropy;
a red color filter layer, a green color filter layer, and a blue color filter layer which are placed on the second substrate corresponding to the pixels for red, green, and blue;
a first vertical alignment film which is formed covering the pixel electrode; and
a second vertical alignment film which is formed closer to the liquid crystal than are the common electrode, the red color filter layer, the green color filter layer, and the blue color filter layer, wherein a condition of D-blue≧
D-green>
D-red is satisfied wherein D-red is a thickness of the red color filter layer, D-green is a thickness of the green color filter layer, and D-blue is a thickness of the blue color filter layer. - View Dependent Claims (29, 30, 31, 32, 33)
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34. A method of manufacturing a vertical alignment liquid crystal display device having pixels for red, green, and blue for displaying three primary colors of red, green, and blue, wherein
the vertical alignment liquid crystal display device comprises: -
a first substrate on which a pixel electrode is formed for each pixel;
a second substrate which is placed opposing the first substrate and which has a common electrode;
liquid crystal which is sealed between the first substrate and the second substrate and which has a negative dielectric constant anisotropy;
a red color filter layer, a green color filter layer, and a blue color filter layer which are placed on the second substrate corresponding to the pixels for red, green, and blue;
a first vertical alignment film which is formed covering the pixel electrode; and
a second vertical alignment film which is formed closer to the liquid crystal than are the common electrode, the red color filter layer, the green color filter layer, and the blue color filter layer, wherein a condition of D-blue≧
D-green>
D-red is satisfied wherein D-red is a thickness of the red color filter layer, D-green is a thickness of the green color filter layer, and D-blue is a thickness of the blue color filter layer, anda material for the red color filter layer having a minimum thickness among the red color filter layer, the green color filter layer, and the blue color filter layer is formed on the side of the second substrate before the blue color filter layer and the green color filter layer are formed, and then, one of a material for the blue color filter layer and a material for the green color filter layer is formed on the side of the second substrate. - View Dependent Claims (35)
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36. A method of manufacturing a vertical alignment liquid crystal display device having pixels for red, green, and blue for displaying three primary colors of red, green, and blue, wherein
the vertical alignment liquid crystal display device comprises: -
a first substrate on which a pixel electrode is formed for each pixel;
a second substrate which is placed opposing the first substrate and which has a common electrode;
liquid crystal which is sealed between the first substrate and the second substrate and which has a negative dielectric constant anisotropy;
a red color filter layer, a green color filter layer, and a blue color filter layer which are placed on the second substrate corresponding to the pixels for red, green, and blue;
a first vertical alignment film which is formed covering the pixel electrode; and
a second vertical alignment film which is formed closer to the liquid crystal than are the common electrode, the red color filter layer, the green color filter layer, and the blue color filter layer, wherein a condition of D-blue≧
D-green>
D-red is satisfied wherein D-red is a thickness of the red color filter layer, D-green is a thickness of the green color filter layer, and D-blue is a thickness of the blue color filter layer,a first filter material including a pigment of red color is applied on a surface of the second substrate and patterned to form the red color filter layer, then, a second filter material including a pigment of green color is applied on the surface of the second substrate and patterned to form the green color filter layer, and then, a third filter material including a pigment of blue color is applied on a surface of the second substrate and patterned to form the blue color filter layer. - View Dependent Claims (37, 38)
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39. A vertical alignment liquid crystal display device having pixels for red, green, and blue for displaying three primary colors of red, green, and blue, the vertical alignment liquid crystal display device comprising:
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a first substrate on which a pixel electrode is formed for each pixel;
a second substrate which is placed opposing the first substrate and which has a common electrode;
liquid crystal which is sealed between the first substrate and the second substrate and which has a negative dielectric constant anisotropy;
a red color filter layer, a green color filter layer, and a blue color filter layer which are placed on the second substrate corresponding to the pixels for red, green, and blue;
a gap layer which is selectively formed on the green color filter layer and the blue color filter layer;
a first vertical alignment film which is formed covering the pixel electrode; and
a second vertical alignment film which is formed closer to the liquid crystal than are the common electrode, the red color filter layer, the green color filter layer, the blue color filter layer, and the gap layer. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46)
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Specification
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Current AssigneeSanyo Electric Company Limited (Panasonic Holdings Corporation)
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Original AssigneeSanyo Electric Company Limited (Panasonic Holdings Corporation)
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InventorsAota, Masaaki, Maeda, Kazuyuki, Inoue, Kazuhiro, Koma, Norio, Kametani, Masayuki, Yamada, Tsutomu, Mitsui, Masashi
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current349/114
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CPC Class CodesG02F 1/133371 Cells with varying thicknes...G02F 1/133514 Colour filtersG02F 1/133555 TransflectorsG02F 1/1337 Surface-induced orientation...G02F 1/133753 with different alignment or...G02F 1/1393 the birefringence of the li...
