Patent ID: 8730273
Filing Date: 2014-05-20
Classification: G09G

Abstract:
1. A four-primary-color display apparatus comprising: a four-color mapping unit for receiving a plurality of three-color image input signals and generating a plurality of corresponding mapping scale ratios and thereby generating a plurality of corresponding four-color image output signals respectively mapping from the three-color image input signals, wherein each of the four-color image output signals comprises a first color signal, a second color signal, a third color signal and a white color signal; a dynamic backlight control unit electrically connected to the four-color mapping unit for receiving the mapping scale ratios, and thereby outputting a backlight adjust signal and a white color signal adjust ratio, wherein the white color signal adjust ratio is for updating the white color signal and is dynamically calculated according to the mapping scale ratios, and the four-color mapping unit operatively adjusts the white color signal to be an updated white color signal according to the white color signal adjust ratio but does not update the generated first through third color signals, wherein the updated white color signal is obtained by multiplying the white color signal by the white color signal adjust ratio; a backlight module electrically connected to the dynamic backlight control unit and for receiving the backlight adjust signal and thereby generating a backlight output intensity; a source driver electrically connected to the four-color mapping unit and for receiving the not-updated first through third color signals and the updated white color signal, and thereby generating a plurality of data signals according to the received not-updated first through third color signals and updated white color signal; and a pixel array electrically connected to the source driver and for displaying an image according to the data signals and the backlight output intensity, wherein: if one of the three-color image input signals is close to pure color, the corresponding mapping scale ratio is near to 1; if one of the three-color image input signals is impure color, the corresponding mapping scale ratio is near to 2.