US 12,394,351 B2
Display apparatus and method of driving 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 Mar. 29, 2023, as Appl. No. 18/128,142.
Claims priority of application No. 10-2022-0064701 (KR), filed on May 26, 2022.
Prior Publication US 2023/0386385 A1, Nov. 30, 2023
Int. Cl. G09G 3/20 (2006.01)
CPC G09G 3/2007 (2013.01) [G09G 3/2096 (2013.01); G09G 2320/0242 (2013.01); G09G 2330/025 (2013.01); G09G 2330/028 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A display apparatus comprising:
a display panel;
a power voltage generator configured to generate a power voltage and output the power voltage to the display panel;
a current sensor configured to sense a panel current of the display panel and output an overcurrent signal when the panel current is greater than a threshold value;
a driving controller configured to generate a compensation value in response to the overcurrent signal and generate a data signal that is processed with the compensation value; and
a data driver configured to generate a data voltage based on the data signal and output the data voltage to the display panel,
wherein an overcurrent mode is turned on immediately after the panel current exceeds the threshold value, and the overcurrent mode is maintained for at least one frame,
wherein the driving controller further comprises a net power controller configured to generate intermediate image data output to a data operator of the driving controller that generates the data signal based on the intermediate image data and the compensation value by decreasing a grayscale value of input image data when a load of the input image data is greater than a reference load,
wherein a net power control operation is turned off in a first frame based on a load of the input image data of a previous frame that immediately preceded the first frame being equal to or less than the reference load, and the overcurrent mode is turned off based on the panel current of the first frame being equal to or less than the threshold value,
wherein the net power control operation is turned off in a second frame which immediately follows the first frame based on the load of the input image data of the first frame being equal to or less than the reference load, and the overcurrent mode is immediately turned on based on the panel current of the second frame exceeding the threshold value, and
wherein the net power control operation is turned on in a third frame which immediately follows the second frame based on the load of the input image data of the second frame being equal to or greater than the reference load, and a turn on state of the overcurrent mode is maintained in the third frame.