Patent ID: 11892726
Assignee: NICHIA CORPORATION
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 8:
9. 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 a timing at which the controller starts the first operation with respect to each of the first areas is delayed from a timing at which the controller starts the second operation with respect to a corresponding one of the second areas by a predetermined interval,
wherein the controller is configured to start the second operation with respect to an earliest one of the second areas in synchronization with a rising edge of a synchronization signal, and
wherein a timing at which the controller starts the second operation with respect to a last one of the second areas is same as a timing at which the controller starts the first operation with respect to an earliest one of the first areas.