US 12,033,595 B2
Data processing device for compensating for data and display device
Yong Hee Kim, Daejeon (KR); Jung Eun Baek, Daejeon (KR); Jin Woo Park, Daejeon (KR); Ji Won Lee, Daejeon (KR); Do Seok Kim, Daejeon (KR); and Young Gi Kim, Daejeon (KR)
Assigned to SILICON WORKS CO., LTD., Daejeon (KR)
Filed by SILICON WORKS CO., LTD., Daejeon (KR)
Filed on Mar. 5, 2021, as Appl. No. 17/193,662.
Claims priority of application No. 10-2020-0029564 (KR), filed on Mar. 10, 2020.
Prior Publication US 2021/0287620 A1, Sep. 16, 2021
Int. Cl. G09G 3/36 (2006.01)
CPC G09G 3/3607 (2013.01) [G09G 3/3648 (2013.01); G09G 3/3674 (2013.01); G09G 3/3685 (2013.01); G09G 2300/043 (2013.01); G09G 2300/0443 (2013.01); G09G 2320/0233 (2013.01); G09G 2320/0242 (2013.01); G09G 2320/0252 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A data processing device for generating image data for a first subpixel and a second subpixel of different colors, which are connected to one data line, the data processing device comprising:
a first data compensating circuit configured to generate compensated image data for applying overdriving or underdriving to grayscale values of image data for the first subpixel and the second subpixel that is driven after the first subpixel in sequence; and
a second data compensating circuit configured, if a grayscale value of the compensated image data of the first subpixel and a grayscale value of the compensated image data of the second subpixel are identical or a difference between the grayscale value of the compensated image data of the first subpixel and the grayscale value of the compensated image data of the second subpixel falls within a predetermined range, to reduce the grayscale value of the compensated image data of the second subpixel, thereby reducing a brightness value of white, and thus increasing a pure-color brightness ratio, wherein
the pure-color brightness ratio is defined as a ratio of a sum of brightness values of red, green, and blue to the brightness value of white,
the first data compensating circuit is configured to generate the compensated image data based on a comparison of the image data for the first subpixel and the image data for the second subpixel,
the second data compensating circuit is configured to:
compare the grayscale value of the compensated image data of the first subpixel to the grayscale value of the compensated image data of the second subpixel; and
based on the comparison, determine whether the grayscale value of the compensated image data of the first subpixel and the grayscale value of the compensated image data of the second subpixel are identical or a difference between the grayscale value of the compensated image data of the first subpixel and the grayscale value of the compensated image data of the second subpixel falls within a predetermined range, and
the grayscale value of the compensated image data of the second subpixel is reduced based on determining that the grayscale value of the compensated image data of the first subpixel and the grayscale value of the compensated image data of the second subpixel are identical or the difference between the grayscale value of the compensated image data of the first subpixel and the grayscale value of the compensated image data of the second subpixel falls within the predetermined range.