Patent ID: 11929042
Assignee: NICHIA CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 9:
10. 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:
generate, based on a synchronization signal, a subdivided synchronization signal having a period less than a period of the synchronization signal;
perform a first operation to cause light to be emitted from the light-emitting regions at respective intensity in accordance with frame image data for a duration of time corresponding to the period of the synchronization signal, sequentially with respect to each of the first areas; and
perform 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 repeatedly turns on and off light-emitting regions in each of the first areas a plurality of times during the first operation thereof at timings in correspondence with pulses of the subdivided synchronization signal generated during the first operation thereof, and
wherein a number of times the light-emitting regions in each of the first areas are turned on and off during the first operation thereof is less than a number of pulses of the subdivided synchronization signal included in the period of the synchronization signal.