Gain-determining method and apparatus for grayscale white balance of display apparatus

摘要

A gain-determining method for grayscale white balance of a display apparatus comprising a panel is provided. The method first displays a white, a red, a green, and a blue images on the panel respectively and measures the chromatic values and luminance of the images. Next, the chromatic values and luminance of a target white image is inputted. Following, according to the measured chromatic values and luminance of the white, the red, the green and the blue images, a first set of color mixture ratios is calculated. Then, according to the chromatic values and luminance of the target white image and the chromatic values and luminance of the red, the green and the blue images, a second set of color mixture ratios is calculated. Finally, according to the first set and the second set of color mixture ratios, a red gain, a green gain and a blue gain are calculated.

主权项

1. A gain-determining method for grayscale white balance of a display apparatus comprising a panel, said gain-determining method comprising the steps of:
displaying a full white image WP on the panel of the display apparatus, and measuring chromatic values and luminance of the full white image WP displayed on the panel, wherein the full white image WP is formed by mixing a full red image RP, a full green image GP and a full blue image BP; displaying the full red image RP on the panel of the display apparatus, and measuring chromatic values and luminance of the full red image RP displayed on the panel; displaying the full green image GP on the panel of the display apparatus, and measuring chromatic values and luminance of the full green image GP displayed on the panel; displaying the full blue image BP on the panel of the display apparatus, and measuring chromatic values and luminance of the full blue image BP displayed on the panel; inputting chromatic values and luminance of a target white image Wi to the display apparatus; calculating a first set of color mixture ratios (mrp, mgp, mbp) with respect to the measured chromatic values and luminance of the full white image WP based on the measured chromatic values and luminance of the full red, green and blue images RP, GP, BP, in accordance with a law of color mixture, respectively, wherein the first set of color mixture ratios (mrp, mgp, mbp) is represented as Wp=mrpRp+mgpGp+mbpBp; calculating a second set of color mixture ratios mri, mgi, mbi) with respect to the chromatic values and the luminance of the target white image Wi based on the measured chromatic values and luminance of the full red, green and blue images RP, GP, BP, in accordance with the law of color mixture, respectively, wherein the second set of color mixture ratios (mri, mgi, mbi) is represented as Wi=mriRp+mgiGp+mbiBp; calculating a red gain cr, a green gain cg, and a blue gain cb, in accordance with the first set of color mixture ratios and the second set of color mixture ratios, respectively, whereincr=mrimrp,cg=mgimgp⁢,cb=mbimbp;  and enabling the display apparatus to adjust a grayscale white balance of an image being inputted to the panel, in accordance with the red, green and blue gains cr, cg, cb, to another grayscale white balance in relation to the chromatic values and the luminance of the target white image Wi.