US 11,749,164 B2
Driving controller, display apparatus having the same and method of driving display panel using the same
Kihyun Pyun, Gwangmyeong-si (KR); and Jang-Mi Lee, Hwaseong-si (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by Samsung Display Co., LTD., Yongin-si (KR)
Filed on Jul. 28, 2022, as Appl. No. 17/876,490.
Claims priority of application No. 10-2021-0100091 (KR), filed on Jul. 29, 2021.
Prior Publication US 2023/0030280 A1, Feb. 2, 2023
Int. Cl. G09G 3/20 (2006.01)
CPC G09G 3/2007 (2013.01) [G09G 2300/0819 (2013.01); G09G 2300/0842 (2013.01); G09G 2310/027 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0276 (2013.01); G09G 2330/028 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A controller to drive a display, the controller comprising:
a voltage code generator to generate a first voltage code to drive pixels in the display based on input image data; and
a voltage code compensator to generate a second voltage code to drive the pixels by compensating zero-grayscale codes of the first voltage code based on the zero-grayscale codes of the first voltage code, one-grayscale codes of the first voltage code, and the input image data,
wherein the voltage code compensator comprises:
a one-grayscale code extractor to extract the one-grayscale codes of the first voltage code;
a compensation range operator to generate range codes based on differences between the zero-grayscale codes of the first voltage code and the one-grayscale codes of the first voltage code;
a histogram analyzer to generate a grayscale histogram based on grayscale levels of frame data of the input image data; and
a compensation ratio operator to determine a compensation ratio of the frame data based on a ratio of grayscale levels of the grayscale histogram.