Patent ID: 9430986
Filing Date: 2016-08-30
CPC Classification: G09G

Claim Text:
1. A color signal processing device for generating image data to be displayed on a display device which represents a color by using at least four primary colors, comprising: a processor; and a non-transitory memory having stored thereon executable instructions, which when executed, cause the processor to operate as: the value of the obtained color signal in the changer is changed by performing a feedback control in which the converter feeds back the converted color signal to the changer, the changer detects whether a pixel having a color indicated by the converted color signal fed back from the converter is a color saturated pixel, the changer counts a number of the detected color saturated pixels, the changer weighs the counted number for a pixel of the color signal indicating a yellow hue with a weight for the yellow hue which is larger than each weight for other color hues, so as to increase a rate of decreasing a color signal for a pixel of which the color signal indicates a yellow hue higher than a rate of decreasing color signals for pixel of which the color signals indicate other color hues, the changer compares the counted number with a first threshold value and a second threshold value, the first threshold value being an integral number of 1 or more and the second threshold value being smaller than the first threshold value, when the counted number is larger than the first threshold value, the changer decreases the value of the obtained color signal for the pixels contained in a predetermined region, when the counted number is smaller than the second threshold value, the changer increases the value of the obtained color signal for the pixels contained in the predetermined region, and the color saturated pixel is a pixel having a color outside of a displayable color gamut of the display device.