Patent ID: 11942023
Assignee: SHARP DISPLAY TECHNOLOGY CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A display device comprising:
a display panel including a first main surface;
an illumination device configured to radiate light to the first main surface; and
a control unit configured to control the display panel and the illumination device,
wherein the illumination device includes
a plurality of first light sources;
a first light control unit configured to impart an optical effect to light emitted from the plurality of first light sources, not to regulate emission of light in a first angle range around a first direction having an angle with respect to the first main surface, and to regulate emission of light in a second angle range around a second direction having an angle different from the angle in the first direction with respect to the first main surface;
a second light source; and
a second light control unit configured to impart an optical effect to light emitted from the second light source and cause the light to be emitted at least in the second angle range,
the control unit switches between display in a first display mode and display in a second display mode based on input of a display switching signal,
when performing display in the first display mode, the control unit corrects an image signal to generate a correction signal, writes a first image based on the correction signal in the display panel, leaves the second light source unlit, and selectively turns on the plurality of first light sources based on the correction signal, and
when performing display in the second display mode, the control unit causes a unit display period to include a first display period and a second display period, generates the correction signal, writes the first image in the display panel, leaves the second light source unlit, and selectively turns on the plurality of first light sources based on the correction signal, in the first display period, and writes a second image based on the image signal in the display panel and turns on at least the second light source, in the second display period.