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US 8,797,371 B2Granted
Method for driving field sequential liquid crystal display device
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorKouhei Toyotaka
Life of this patent
Estimating the term…
Abstract
To reduce crosstalk in sequential frame periods. An image signal is written to a pixel in a first sub-frame period. Then, just before a second sub-frame period, the light source is lit in accordance with the image signal written in the first sub-frame period and sequentially, the image signal is written in the second sub-frame period of the right eye frame period. Then, just before the next first sub-frame period, the light source is lit in accordance with the image signal in the third sub-frame period and sequentially, writing of the image signal is performed in the third sub-frame period of the right eye frame period.
Claims20
A method for driving a liquid crystal display device comprising:
- selecting one of a plurality of scan lines in each of a plurality of divided regions in a display region at the same time,
- wherein the divided regions comprise a first divided region, a second divided region and a third divided region;
- writing a first image signal in the first divided region in a first sub-frame period of a first frame period;
- lighting a first light source of a first color in the first divided region in accordance with the first image signal;
- writing a second image signal in the first divided region in a first sub-frame period of a second frame period just after lighting the first light source without a period where the first light source is not lit;
- lighting a second light source of a second color in the first divided region in accordance with the second image signal;
- writing a third image signal in the second divided region in the first sub-frame period of the first frame period;
- lighting a third light source of a third color in the second divided region in accordance with the third image signal;
- writing a fourth image signal in the second divided region in the first sub-frame period of the second frame period just after lighting the third light source without a period where the third light source is not lit;
- lighting a fourth light source of the first color in the second divided region in accordance with the fourth image signal;
- writing a fifth image signal in the third divided region in the first sub-frame period of the first frame period;
- lighting a fifth light source of a fourth color in the third divided region in accordance with the fifth image signal;
- writing a sixth image signal in the third divided region in the first sub-frame period of the second frame period just after lighting the fifth light source without a period where the fifth light source is not lit;
- and
- lighting a sixth light source of the third color in the third divided region in accordance with the sixth image signal,
- wherein the second frame period is after the first frame period.
13 more elements
A method for driving a liquid crystal display device comprising:
- selecting one of a plurality of scan lines in each of a plurality of divided regions in a display region at the same time,
- wherein the divided regions comprise a first divided region;
- writing a first image signal in the first divided region in a first sub-frame period of a first frame period;
- lighting a first light source of a first color in the first divided region in accordance with the first image signal;
- writing a second image signal in the first divided region in a second sub-frame period of the first frame period just after lighting the first light source without a period where the first light source is not lit;
- lighting a second light source of a second color in the first divided region in accordance with the second image signal;
- writing a third image signal in the first divided region in a third sub-frame period of the first frame period just after lighting the second light source without a period where the second light source is not lit;
- lighting a third light source of a third color in the first divided region in accordance with the third image signal;
- writing a fourth image signal in the first divided region in a first sub-frame period of a second frame period just after lighting the third light source without a period where the third light source is not lit;
- and
- lighting the first light source in the first divided region in accordance with the fourth image signal,
- wherein the second frame period is after the first frame period,
- wherein the second sub-frame period of the first frame period is after the first sub-frame period of the first frame period, and
- wherein the third sub-frame period of the first frame period is after the second sub-frame period of the first frame period.
11 more elements
A method for driving a liquid crystal display device comprising:
- selecting one of a plurality of scan lines in each of a plurality of divided regions in a display region at the same time,
- writing a first image signal in a first sub-frame period of a first frame period for lighting of a first light source, wherein the lighting of the first light source is performed just before writing of a second image signal of a second sub-frame period of the first frame period without a period where the first light source is not lit;
- writing the second image signal in the second sub-frame period of the first frame period for lighting of a second light source, wherein the lighting of the second light source is performed just before writing of a third image signal of a third sub-frame period of the first frame period without a period where the second light source is not lit;
- and
- writing the third image signal in the third sub-frame period of the first frame period for lighting of a third light source, wherein the lighting of the third light source is performed just before writing of a fourth image signal of a first sub-frame period of a second frame period without a period where the third light source is not lit,
- wherein the second frame period is after the first frame period,
- wherein the second sub-frame period of the first frame period is after the first sub-frame period of the first frame period,
- wherein the third sub-frame period of the first frame period is after the second sub-frame period of the first frame period,
- wherein colors by lighting of the first light source, the second light source, and the third light source in accordance with the first image signal, the second image signal, and the third image signal are different from each other,
- wherein a first image for one of a left eye and a right eye is displayed in the first frame period,
- wherein a second image for the other of the left eye and the right eye is displayed in the second frame period,
- wherein the first image and the second image are displayed alternately on the display region, and
- wherein color display in the display region in the first frame period and the second frame period is performed by lighting of the first light source, the second light source, and the third light source in accordance with the first image signal, the second image signal, and the third image signal.
10 more elements
Dependencies are inferred from the claim text.