US 11,948,532 B2
Display device capable of performing peak driving in display area and driving method thereof
Ki Hyun Pyun, Gwangmyeong-si (KR); and Eun Jin Choi, Yongin-si (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by Samsung Display Co., Ltd., Yongin-Si (KR)
Filed on Oct. 31, 2022, as Appl. No. 17/978,057.
Application 17/978,057 is a continuation of application No. 17/133,207, filed on Dec. 23, 2020, granted, now 11,488,562.
Claims priority of application No. 10-2020-0056116 (KR), filed on May 11, 2020.
Prior Publication US 2023/0052687 A1, Feb. 16, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G09G 5/10 (2006.01); G09G 3/20 (2006.01)
CPC G09G 5/10 (2013.01) [G09G 3/2007 (2013.01); G09G 2320/0673 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A display device comprising:
a display area including a plurality of pixels;
a peak driving determination part receiving an input image signal from an external source, determining a peak driving based on the input image signal, and outputting a peak driving enable signal;
a normal driving compensation part receiving the peak driving enable signal, the normal driving compensation part including a first luminance lookup table having a first luminance as a peak luminance;
a peak driving compensation part including a second luminance lookup table having a second luminance higher than the first luminance as the peak luminance;
a compensation adjusting part generating a peak driving gamma curve by smoothing a first luminance gamma curve corresponding to the first luminance lookup table and a second luminance gamma curve corresponding to the second luminance lookup table and generating a peak driving lookup table according to the peak driving gamma curve;
a signal controller receiving the input image signal and a synchronization signal from the external source to generate an image data signal by applying a normal driving lookup table for one portion of the display area and applying the peak driving lookup table for another portion of the display area; and
a gray analyzing part receiving the input image signal from the external source to determine a peak driving reference gray based on the input image signal and simultaneously transmitting the peak driving reference gray to the normal driving compensation part and the peak driving compensation part,
wherein the gray analyzing part calculates an average gray of an image from the input image signal, and determines the average gray of the image as the peak driving reference gray.