Patent ID: 9697761
Date: 2017-07-04
CPC Classifications: G09G

Claim:
1. A conversion method of three-color data to four-color data, comprising steps: A) converting input RGB data to intermediate RGBW data according to a first predetermined saturation parameter, a second predetermined saturation parameter and a third predetermined saturation parameter; B) obtaining a first saturation adjust parameter, a second saturation adjust parameter and a third saturation adjust parameter according to the intermediate RGBW data and predetermined RGBW data; C) using the first saturation adjust parameter, the second saturation adjust parameter and the third saturation adjust parameter to respectively adjust the first predetermined saturation parameter, the second predetermined saturation parameter and the third predetermined saturation parameter; and D) using the first predetermined saturation parameter after being adjusted, the second predetermined saturation parameter after being adjusted and the third predetermined saturation parameter after being adjusted to convert the input RGB data to output RGBW data.