Image display method and image display device
AssigneeNichia Corporation
InventorsMasahiko MONOMOSHI, Tetsuya KATAOKA
Life of this patent
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Abstract
An image display method using an image display device is provided. The method includes performing a first operation to cause light to be emitted from light-emitting regions of a backlight at respective intensity in accordance with frame image data, sequentially with respect to each of first areas of the backlight, and performing a second operation to apply voltages to pixels of a liquid crystal panel at respective levels in accordance with the frame image data, sequentially with respect to each of second areas of the liquid crystal panel. Light-emitting regions in each of the first areas are repeatedly turned on and off a plurality of times during the first operation thereof.
Claims20
An image display method using an image display device including:
- a backlight including a plurality of light-emitting regions arranged in a matrix configuration in a first direction and a second direction, the light-emitting regions being divided into a plurality of first areas in the first direction;
- and
- a liquid crystal panel on the backlight, the liquid crystal panel including a plurality of pixels arranged in a matrix configuration in the first and second directions, the pixels being divided into a plurality of second areas in the first direction, the method comprising:
- performing a first operation to cause light to be emitted from the light-emitting regions at respective intensity in accordance with frame image data, sequentially with respect to each of the first areas;
- and
- performing a second operation to apply voltages to the pixels at respective levels in accordance with the frame image data, sequentially with respect to each of the second areas, wherein
- the first operation is started with respect to each of the first areas with a predetermined delay after the second operation with respect to a corresponding one of the second areas,
- the light-emitting regions in each of the first areas are repeatedly turned on and off a plurality of times during the first operation thereof, and
- a first time the light-emitting regions in each of the first areas are turned on during the first operation in accordance with the frame image data is a predetermined time period after a last time the light-emitting regions in the first area are turned off in accordance with previous frame image data that is immediately prior to the frame image data.
An image display device comprising:
- a backlight including a plurality of light-emitting regions arranged in a matrix configuration in a first direction and a second direction, the light-emitting regions being divided into a plurality of first areas in the first direction;
- a liquid crystal panel on the backlight, the liquid crystal panel including a plurality of pixels arranged in a matrix configuration in the first and second directions, the pixels being divided into a plurality of second areas in the first direction;
- and
- a controller configured to perform:
- a first operation to cause light to be emitted from the light-emitting regions at respective intensity in accordance with frame image data, sequentially with respect to each of the first areas;
- and
- a second operation to apply voltages to the pixels at respective levels in accordance with the frame image data, sequentially with respect to each of the second areas, wherein
- the controller starts the first operation with respect to each of the first areas with a predetermined delay after the second operation with respect to a corresponding one of the second areas,
- the controller repeatedly turns on and off light-emitting regions in each of the first areas a plurality of times during the first operation thereof, and
- a first time the light-emitting regions in each of the first areas are turned on during the first operation in accordance with the frame image data is a predetermined time period after a last time the light-emitting regions in the first area are turned off in accordance with previous frame image data that is immediately prior to the frame image data.
Dependencies are inferred from the claim text.