Liquid crystal display device
First Claim
1. A liquid crystal display device having a liquid crystal display panel and a backlight which is arranged on a back surface of the liquid crystal display panel, wherein the backlight includes a plurality of linear light sources which are provided to a surface substantially parallel to a surface of the liquid crystal display panel, are extended in the x direction of the liquid crystal display panel and are arranged in parallel in the y direction, and among respective light sources, at the time of performing the display driving, the light source arranged at a center portion repeats the lighting and the extinguishing and other remaining light sources maintain the lighting.
5 Assignments
0 Petitions
Accused Products
Abstract
In a liquid crystal display device having a backlight, the backlight has a first state which outputs a first amount of light and a second state which generates a second amount of light and the time for the first state and the time for the second state are controlled. Due to such a constitution, the liquid crystal display device can display clear motion picture images in spite of a simple constitution thereof. Further, the liquid crystal display device can display clear and bright motion picture images.
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Citations
23 Claims
- 1. A liquid crystal display device having a liquid crystal display panel and a backlight which is arranged on a back surface of the liquid crystal display panel, wherein the backlight includes a plurality of linear light sources which are provided to a surface substantially parallel to a surface of the liquid crystal display panel, are extended in the x direction of the liquid crystal display panel and are arranged in parallel in the y direction, and among respective light sources, at the time of performing the display driving, the light source arranged at a center portion repeats the lighting and the extinguishing and other remaining light sources maintain the lighting.
- 4. A liquid crystal display device having a liquid crystal display panel and a backlight which is arranged on a back surface of the liquid crystal display panel, wherein the backlight includes a plurality of linear light sources which are provided to a surface substantially parallel to a surface of the liquid crystal display panel, are extended in the x direction of the liquid crystal display panel and are arranged in parallel in the y direction, and at the time of performing the display driving, the respective light sources repeat the lighting and the extinguishing and the duty of the lighting of the light source arranged at a center portion is set smaller than the duty of the lighting of the remaining other light sources.
- 5. A liquid crystal display device having a liquid crystal display panel in which respective pixel groups to which video signals are supplied are selected in response to scanning signals supplied to gate signal lines and a backlight which is arranged on a back surface of the liquid crystal display panel, wherein the backlight includes a plurality of linear light sources which are provided to a surface substantially parallel to a surface of the liquid crystal display panel, are extended in the direction parallel to the gate signal lines and are arranged in parallel in the direction which intersects the direction parallel to the gate signal lines, and the light source arranged at least at a center portion repeats the lighting and the extinguishing and the light source disposed at least at one of both sides of the center portion maintains the lighting.
- 6. A liquid crystal display device having a liquid crystal display panel in which respective pixel groups to which video signals are supplied are selected in response to scanning signals supplied to gate signal lines and a backlight which is arranged on a back surface of the liquid crystal display panel, wherein the backlight includes a plurality of linear light sources which are provided to a surface substantially parallel to a surface of the liquid crystal display panel, are extended in the direction parallel to the gate signal lines and are arranged in parallel in the direction which intersects the direction parallel to the gate signal lines, and at the time of performing the sequential display of respective frames of the liquid crystal display panel, for each frame, the light source arranged at least at a center portion repeats the lighting and the extinguishing without changing a phase and the light source disposed at least at one of both sides of the center portion repeats the lighting and the extinguishing while shifting the phase.
- 7. A liquid crystal display device having a liquid crystal display panel in which respective pixel groups to which video signals are supplied are selected in response to scanning signals supplied to gate signal lines and a backlight which is arranged on a back surface of the liquid crystal display panel, wherein the backlight includes a plurality of linear light sources which are provided to a surface substantially parallel to a surface of the liquid crystal display panel, are extended in the direction parallel to the gate signal lines and are arranged in parallel in the direction which intersects the direction parallel to the gate signal lines, and each light source repeats the lighting and the extinguishing at the same frequency and the frequency of the lighting and extinguishing of the light source disposed at least at a center portion is set smaller than the frequency of the lighting and extinguishing of the light sources disposed at least at one of both sides of the center portion.
- 8. A liquid crystal display device having a liquid crystal display panel in which respective pixel groups to which video signals are supplied are selected in response to scanning signals supplied to gate signal lines and a backlight which is arranged on a back surface of the liquid crystal display panel, wherein the backlight includes a plurality of linear light sources which are provided to a surface substantially parallel to a surface of the liquid crystal display panel, are extended in the direction parallel to the gate signal lines and are arranged in parallel in the direction which intersects the direction parallel to the gate signal lines, and each light source repeats the lighting and the extinguishing and the duty of the lighting of the light source disposed at least a center portion is set smaller than the duty of the lighting of the light sources disposed at least at one of both sides of the center portion.
- 9. A liquid crystal display device having a liquid crystal display panel in which respective pixel groups to which video signals are supplied are selected in response to scanning signals supplied to gate signal lines and a backlight which is arranged on a back surface of the liquid crystal display panel, wherein the backlight includes a plurality of linear light sources which are provided to a surface substantially parallel to a surface of the liquid crystal display panel, are extended in the direction parallel to the gate signal lines and are arranged in parallel in the direction which intersects the direction parallel to the gate signal lines, and the light source disposed at least at a center portion repeats the lighting and the extinguishing and the light source disposed at least at one of both sides of the center portion maintains the lighting and also receives a less amount of a supply current or a supply voltage than the light source disposed at tile center portion.
- 10. A liquid crystal display device having a liquid crystal display panel in which respective pixel groups to which video signals are supplied are selected in response to scanning signals supplied to gate signal lines and a backlight which is arranged on a back surface of the liquid crystal display panel, wherein the backlight includes a plurality of linear light sources which are provided to a surface substantially parallel to a surface of the liquid crystal display panel, are extended in the direction parallel to the gate signal lines and are arranged in parallel in the direction which intersects the direction parallel to the gate signal lines, and the light sources disposed at least a center portion repeat the lighting and the extinguishing and the light source disposed at least at one of both sides of the center portion maintains the lighting, and an arrangement pitch between the light sources disposed at least at one of both sides of the center portion is set larger than an arrangement pitch between the neighboring other light sources.
- 11. A liquid crystal display device having a liquid crystal display panel in which respective pixel groups to which video signals are supplied are selected in response to scanning signals supplied to gate signal lines and a backlight which is arranged on a back surface of the liquid crystal display panel, wherein the backlight includes a plurality of linear light sources which are provided to a surface substantially parallel to a surface of the liquid crystal display panel, are extended in the direction parallel to the gate signal lines and are arranged in parallel in the direction which intersects the direction parallel to the gate signal lines, and the light source disposed at least a center portion repeats the lighting and the extinguishing and the light source disposed at least at one of both sides of the center portion maintains the lighting, and at least one of the light source disposed at the center portion and one of the light sources disposed at least at one of both sides of the light source disposed at the center portion are capable of controlling the magnitude of a supply current or a supply voltage.
- 13. A liquid crystal display device having a liquid crystal display panel which includes a plurality of scanning lines and a backlight which has a plurality of light sources arranged parallel to a virtual surface which is substantially parallel to the liquid crystal display panel, wherein the lighting and the extinguishing of a plurality of these light sources are repeated after the starting of supply of scanning signals and at least one light source is lit with a delay of at least one frame which controls the scanning signals.
Specification