US 7,679,684 B2Granted

White balance adjusting device and video display device

AssigneePanasonic Corporation

InventorsSusumu Miura, Takahisa Hatano, Kosho Suzuki

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Abstract

During adjustment of a white balance, images having different white balances are displayed respectively on a plurality of regions on the screen 201 of the display 200, based on the red video signal Rout, the green video signal Gout and the blue video signal Bout output from the gamma correction device 30. After that, an user selects any of the plurality of regions by comparing the plurality of images having the different white balances displayed on the regions A to I on the screen 201 of the display 200 and pressing a touch panel on the screen 201. The image on the selected region is displayed on the entire screen 201 of the display 200, based on the red video signal Rout, the green video signal Gout and the blue video signal Bout output from the gamma correction device 30.

Claims12

Dependent claims

A white balance adjusting device used for a display capable of displaying images respectively on a plurality of regions on a screen, for adjusting white balances of images displayed by first, second and third primary signals corresponding respectively to different colors, comprising:

a storage that stores a plurality of first correction data signals for gamma correction of the first primary signal, a plurality of second correction data signals for the gamma correction of the second primary signal and a plurality of third correction data signals for the gamma correction of the third primary signal;
a first selector that selects any of the plurality of first correction data signals, any of the plurality of second correction data signals and any of the plurality of third correction data signals stored in said storage;
a corrector that carries out the gamma correction of the input first, second and third primary signals using the first, second and third correction data signals selected by said first selector;
and
an adjustment instruction device that gives an instruction to adjust the white balance, wherein
said first selector selects a plurality of different combinations of the first, second and third correction data signals corresponding respectively to the plurality of regions on the screen of said display when said adjustment instruction device gives the instruction to adjust the white balance, and
said corrector corrects the input first, second and third primary signals using the plurality of different combinations of first, second and third correction data signals selected by said first selector to display the images having different white balances on said plurality of regions, respectively.

4 more elements

A video display device comprising:

a display having a screen;
a signal processor that generates first, second and third primary signals corresponding respectively to different colors to display an image on the screen of said display;
and
a white balance adjusting device that adjusts a white balance of the image displayed on the screen of said display, wherein
said white balance adjusting device includes:
a storage that stores a plurality of first correction data signals for gamma correction of the first primary signal, a plurality of second correction data signals for the gamma correction of the second primary signal and a plurality of third correction data signals for the gamma correction of the third primary signal;
a first selector that selects any of the plurality of first correction data signals, any of the plurality of second correction data signals and any of the plurality of third correction data signals stored in said storage;
a corrector that carries out the gamma correction of the first, second and third primary signals generated by said signal processor using the first, second and third correction data signals selected by said first selector;
and
an adjustment instruction device that gives an instruction to adjust the white balance, and wherein
said first selector selects a plurality of different combinations of the first, second and third correction data signals corresponding respectively to a plurality of regions on the screen of said display when said adjustment instruction device gives the instruction to adjust the white balance, and wherein
said corrector corrects the first, second and third primary signals generated by said signal processor using the plurality of different combinations of the first, second and third correction data signals selected by said first selector, and
said display displays the images having different white balances on said plurality of regions, respectively, based on the first, second and third correction data signals corrected by said corrector.

10 more elements

Dependencies are inferred from the claim text.