Multiple-primary color liquid crystal display apparatus
First Claim
1. A multi-primary-color liquid crystal display device comprising a liquid crystal display panel with a pixel made up of red, green, blue and yellow subpixels,the device further comprising a signal conversion circuit which converts an input three-primary-color video signal into a four-color video signal corresponding to the colors red, green, blue and yellow that are displayed by the red, green, blue and yellow subpixels, respectively,wherein when the three-primary-color video signal supplied to the signal conversion circuit is indicated as (r, g, b) using the grayscale levels r, g and b (each of which is an integer of 0 through 255) of the three primary colors of red, green and blue and when the luminance of the color white displayed by the pixel in response to a three-primary-color video signal indicated as (255, 255, 255) is supposed to be 100%,the signal conversion circuit adjusts the level of the four-color video signal so that when a three-primary-color video signal indicated as (186, 0, 0) is input, the luminance of the color red displayed by the red subpixel, which is a relative luminance of the red subpixel compared to a maximum luminance of the pixel, becomes equal to or greater than 6.5%.
1 Assignment
0 Petitions
Accused Products
Abstract
A multi-primary-color liquid crystal display device (100) according to the present invention includes a liquid crystal display panel (10) with a pixel made up of red, green, blue and yellow subpixels (R, G, B, Ye) and a signal conversion circuit (20) which converts an input three-primary-color video signal into a four-color video signal. If the three-primary-color video signal supplied to the signal conversion circuit is indicated as (r, g, b) using the grayscale levels r, g and b (each of which is an integer of 0 through 255) of the three primary colors of red, green and blue and if the luminance of the color white displayed by the pixel in response to a three-primary-color video signal indicated as (255, 255, 255) is supposed to be 100%, the signal conversion circuit adjusts the level of the four-color video signal so that when a three-primary-color video signal indicated as (186, 0, 0) is input, the luminance of the color red displayed by the red subpixel becomes equal to or greater than 6.5%.
27 Citations
15 Claims
-
1. A multi-primary-color liquid crystal display device comprising a liquid crystal display panel with a pixel made up of red, green, blue and yellow subpixels,
the device further comprising a signal conversion circuit which converts an input three-primary-color video signal into a four-color video signal corresponding to the colors red, green, blue and yellow that are displayed by the red, green, blue and yellow subpixels, respectively, wherein when the three-primary-color video signal supplied to the signal conversion circuit is indicated as (r, g, b) using the grayscale levels r, g and b (each of which is an integer of 0 through 255) of the three primary colors of red, green and blue and when the luminance of the color white displayed by the pixel in response to a three-primary-color video signal indicated as (255, 255, 255) is supposed to be 100%, the signal conversion circuit adjusts the level of the four-color video signal so that when a three-primary-color video signal indicated as (186, 0, 0) is input, the luminance of the color red displayed by the red subpixel, which is a relative luminance of the red subpixel compared to a maximum luminance of the pixel, becomes equal to or greater than 6.5%.
-
9. A multi-primary-color liquid crystal display device comprising a liquid crystal display panel with a pixel made up of red, green, blue and yellow subpixels,
the device further comprising a signal conversion circuit which converts an input three-primary-color video signal into a four-color video signal corresponding to the colors red, green, blue and yellow that are displayed by the red, green, blue and yellow subpixels, respectively, wherein if the three-primary-color video signal supplied to the signal conversion circuit is indicated as (r, g, b) using the grayscale levels r, g and b (each of which is an integer of 0 through 255) of the three primary colors of red, green and blue and when the luminance of the color white displayed by the pixel in response to a three-primary-color video signal indicated as (255, 255, 255) is supposed to be 100%, the signal conversion circuit adjusts the level of the four-color video signal so that when a three-primary-color video signal indicated as (223, 0, 0) is input, the luminance of the color red displayed by the red subpixel, which is a relative luminance of the red subpixel compared to a maximum luminance of the pixel, becomes equal to or greater than 9.7%.
Specification