Patent ID: 9666162
Date: 2017-05-30
CPC Classifications: G09G

Claim:
1. A method for converting an image from RGB input signals to RGBY output signals, comprising: converting received RGB input signals into corresponding RGB luminance input values respectively; determining color coordinate values and luminance values of a corresponding point of the corresponding RGB luminance input values in a chromatic diagram; determining, according to the color coordinate values of the corresponding point, a position relationship between the corresponding point and a region formed by RBY as well as a position relationship between the corresponding point and a region formed by GBY in the chromatic diagram; determining RGBY luminance output values according to the determined position relationships, a predetermined luminance adjustment coefficient, the color coordinate values and the luminance values of the corresponding point respectively; and converting the determined RGBY luminance output values into corresponding RGBY output signals respectively and outputting the corresponding RGBY output signals, wherein the determining the RGBY luminance output values according to the determined position relationships, a predetermined luminance adjustment coefficient, the color coordinate values and the luminance values of the corresponding point respectively comprises: when it is determined that the corresponding point is located in the region formed by RBY, calculating the RGBY luminance output values by using the following formulas: or when it is determined that the corresponding point is located in the region formed by GBY, calculate the RGBY luminance output values by using the following formulas: where L