Patent ID: 11862118
Assignee: SHARP NEC DISPLAY SOLUTIONS, LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A display data processing device that performs color adjustment on gradation values of pixels of a frame image of an input video signal and outputs the adjusted gradation values to a display device, comprising:
a first gamma correction unit configured to, based on first composite correction information according to a first gamma characteristic indicating a correspondence relationship between a first input gradation value and a first normalized brightness value and a first power function indicating a correspondence relationship between the first normalized brightness value and a first corrected gradation value, set the gradation value as the first input gradation value and to convert the first input gradation value into the first corrected gradation value;
a video gain correction unit configured to perform color adjustment on the first corrected gradation value according to video gain correction and to output the result as a video gain corrected gradation value; and
a second gamma correction unit configured to, based on second composite correction information according to a second power function having the same power as the first power function, which indicates a correspondence relationship between a second input gradation value and a second normalized brightness value, and a second gamma characteristic indicating a correspondence relationship between the second normalized brightness value and a second corrected gradation value, set the video gain corrected gradation value as the second input gradation value and to convert the second input gradation value into the second corrected gradation value.