DISPLAY DEVICE
First Claim
1. A display device comprising a plurality of pixels,wherein in each pixel, a plurality of subframe periods are provided in one frame period, and a gray level of the pixel is expressed in accordance with a time integration level of instantaneous luminances expressed in the plurality of subframe periods,wherein the time integration level is increased as a level of gray level data of the pixel is higher,wherein the time integration level is increased as an average value of gray level data of an original image is smaller, andwherein the plurality of subframe periods are equal in length.
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Abstract
A display device in which the image quality is improved by control of the peak luminance. A plurality of instantaneous luminances are expressed by performing signal writing to each pixel plural times within one frame period. The gray level is expressed by controlling time integration levels of the plurality of instantaneous luminances. Moreover, the time integration level is increased as the level of gray level data of the pixel is higher, and the time integration level is increased as the average value of gray level data of an image to be displayed is smaller.
87 Citations
15 Claims
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1. A display device comprising a plurality of pixels,
wherein in each pixel, a plurality of subframe periods are provided in one frame period, and a gray level of the pixel is expressed in accordance with a time integration level of instantaneous luminances expressed in the plurality of subframe periods, wherein the time integration level is increased as a level of gray level data of the pixel is higher, wherein the time integration level is increased as an average value of gray level data of an original image is smaller, and wherein the plurality of subframe periods are equal in length.
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6. A display device comprising a plurality of pixels,
wherein a first subframe period and a second subframe period are provided in one frame period, and a gray level of the pixel is expressed in accordance with a time integration level of a first instantaneous luminance expressed in the first subframe period and a second instantaneous luminance expressed in the second subframe period, wherein the time integration level is increased as a level of gray level data of the pixel is higher, wherein the time integration level is increased as an average value of gray level data of an original image is smaller, and wherein the first subframe period and the second subframe period are equal in length.
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10. A display device comprising:
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an image feature amount detection portion for detecting gray level data distribution of gray level data of an original image; a scale factor determination portion for determining a scale factor in accordance with the gray level data distribution detected by the image feature amount detection portion; a gray level data conversion portion for converting the gray level data of the original image into gray level data of a first subimage and gray level data of a second subimage in accordance with the scale factor determined by the scale factor determination portion; and a display portion for displaying the first subimage and the second subimage. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification