Liquid crystal display
First Claim
1. A liquid crystal display comprising:
- a liquid crystal sealed between a pair of substrates provided opposite to each other;
a plurality of pixels provided in a form of a matrix on either of the pair of substrates;
a thin film transistor formed at each of the pixels;
an image processing unit for determining a high luminance of the pixel in a high-luminance frame and a low luminance of the pixel in a low-luminance frame and the ratio of presence between the high-luminance frame and the low-luminance frame to achieve luminance substantially equal to predetermined luminance by combining the high-luminance frame which drives the pixel to luminance higher than the predetermined luminance that is associated with a gradation value in input image data and the low-luminance frame which drives the pixel to luminance lower than the predetermined luminance;
a first sub-pixel formed in the pixel; and
a second sub-pixel which is formed in the pixel separately from the first sub-pixel and which provides luminance per unit area lower than that of the first sub-pixel.
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Accused Products
Abstract
The invention relates to a liquid crystal display used in a television receiver or a display section of an electronic apparatus and provides a liquid crystal display having a wide viewing angle and high viewing angle characteristics. The viewing angle characteristics of low gradations are improved by the capacitive coupling HT method. The viewing angle characteristics of high gradations above the intermediate gradation are improved by the driving HT method. A liquid crystal is driven using the capacitive coupling HT method and the driving HT method in combination to combine the effect of improvement of both methods, thereby improving the viewing angle characteristics of a liquid crystal display for a wide range from a low gradation to a high gradation.
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Citations
18 Claims
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1. A liquid crystal display comprising:
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a liquid crystal sealed between a pair of substrates provided opposite to each other;
a plurality of pixels provided in a form of a matrix on either of the pair of substrates;
a thin film transistor formed at each of the pixels;
an image processing unit for determining a high luminance of the pixel in a high-luminance frame and a low luminance of the pixel in a low-luminance frame and the ratio of presence between the high-luminance frame and the low-luminance frame to achieve luminance substantially equal to predetermined luminance by combining the high-luminance frame which drives the pixel to luminance higher than the predetermined luminance that is associated with a gradation value in input image data and the low-luminance frame which drives the pixel to luminance lower than the predetermined luminance;
a first sub-pixel formed in the pixel; and
a second sub-pixel which is formed in the pixel separately from the first sub-pixel and which provides luminance per unit area lower than that of the first sub-pixel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 17, 18)
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11. A liquid crystal display comprising:
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a liquid crystal sealed between a pair of substrates provided opposite to each other;
a plurality of gate bus lines formed in parallel with each other on one of the pair of substrates;
a plurality of drain bus lines formed across the plurality of gate bus lines with an insulation film interposed between them;
a thin film transistor provided at each of intersections between the bus lines and having a gate electrode electrically connected to the gate bus line, a drain electrode electrically connected to the drain bus line, and a source electrode provided above the gate electrode so as to face the drain electrode with a predetermined gap left between them; and
a pixel group including a plurality of pixels different from each other in the area ratio between a first pixel electrode which is electrically connected to the source electrode through a control electrode and a second pixel electrode which is separate from the first pixel electrode and which sandwiches an insulation film between itself and the control electrode to form a predetermined electric capacitance. - View Dependent Claims (12, 13, 16)
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14. A liquid crystal display comprising:
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a liquid crystal sealed between a pair of substrates provided opposite to each other;
a plurality of gate bus lines formed in parallel with each other on one of the pair of substrates;
a plurality of drain bus lines formed across the plurality of gate bus lines with an insulation film interposed between them;
a thin film transistor provided at each of intersections between the bus lines and having a gate electrode electrically connected to the gate bus line, a drain electrode electrically connected to the drain bus line, and a source electrode provided above the gate electrode so as to face the drain electrode with a predetermined gap left between them; and
a pixel group including a plurality of pixels, wherein the capacitance value of a predetermined electric capacitance formed by an insulation film sandwiched between a second pixel electrode and a control electrode is different between the pixels, the second electrode being separate from a first pixel electrode which is electrically connected to the source electrode through the control electrode. - View Dependent Claims (15)
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Specification