Patent ID: 11948522
Assignee: JAPAN DISPLAY INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 25:
26. A display device comprising:
an image display panel configured to display an image based on an image signal; and
a light source device having a first divided area and a second divided area adjacent to the first divided area that face an image display surface of the image display panel, wherein
the image display panel is configured to calculate a light quantity of the first divided area and a light quantity of the second divided area based on the image signals, and reduce the light quantity of the first divided area when the light quantity of the second divided area is equal to or smaller than a predetermined value, or when the light quantity of the first divided area is larger than the light quantity of the second divided area by a predetermined value or more,
the light source device has a plurality of the first divided areas and a plurality of the second divided areas for each of the first divided areas,
the image display panel is configured to
sequentially select each of the first divided areas to perform light quantity adjustment,
sequentially select each of a plurality of the second divided areas for the selected one of the first divided areas,
determine whether any unselected second divided area is present for the selected first divided area,
select an unselected second divided area of the second divided areas when any unselected second divided area is present, and
select an unselected first divided area when no unselected second divided area is present, and

the signal processor is configured to reduce an adjustment coefficient only as a value of brightness of the image signal corresponding to the adjustment target partial first divided area increases.