US 11,670,212 B2
Image sticking compensation device and display device having the same
Jae Hoon Lee, Yongin-si (KR); Seung Ho Park, Yongin-si (KR); Jin Ho Lee, Yongin-si (KR); and Sang Myeon Han, Yongin-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Gyeonggi-Do (KR)
Filed by SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed on Nov. 10, 2021, as Appl. No. 17/523,218.
Claims priority of application No. 10-2021-0002881 (KR), filed on Jan. 8, 2021.
Prior Publication US 2022/0223092 A1, Jul. 14, 2022
Int. Cl. G09G 3/20 (2006.01)
CPC G09G 3/2007 (2013.01) [G09G 2300/0842 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0257 (2013.01); G09G 2320/048 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An image sticking compensation device, comprising:
a deterioration calculator which calculates deterioration data of a current frame based on input image data and sensing frequency information which are received from a timing controller;
an accumulator which accumulates the deterioration data and generates age data in which the deterioration data is accumulated; and
a compensator which determines a grayscale compensation value corresponding to the age data and an input grayscale value of the input image data, and outputs age compensation data by applying the grayscale compensation value to the input image data,
wherein the sensing frequency information includes a frequency of the current frame, and
wherein the deterioration data varies in accordance with the frequency of the current frame,
wherein the deterioration calculator calculates the deterioration data using following Equation (1):
deterioration data of current frame=reference age value×(reference frequency)/(sensing frequency)
wherein the reference frequency is a frequency in normal frames other than a frame to which a variable frequency is applied, the reference age value is a value corresponding to a time during which a pixel emits light during one frame driven at the reference frequency, and the sensing frequency is a frequency of the current frame.