US 12,293,693 B2
Current sensor and display device including 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 Dec. 12, 2022, as Appl. No. 18/079,607.
Claims priority of application No. 10-2022-0026280 (KR), filed on Feb. 28, 2022.
Prior Publication US 2023/0274686 A1, Aug. 31, 2023
Int. Cl. G09G 3/20 (2006.01); G01R 19/165 (2006.01)
CPC G09G 3/2096 (2013.01) [G01R 19/16571 (2013.01); G09G 3/2007 (2013.01); G09G 2300/0828 (2013.01); G09G 2330/021 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A display device, comprising:
a display panel which displays an image based on image data;
a power supply which provides a driving voltage to the display panel through a power line;
a current sensor which generates first current data including an average sensing current, a minimum sensing current, and a maximum sensing current of a first period based on sensing currents generated by sampling a current flowing through the power line at a sampling frequency, generates second current data including an average sensing current, a minimum sensing current, and a maximum sensing current of a second period shorter than the first period based on the sensing currents, and includes a first controller controlling the image data or the power supply based on the second current data; and
a timing controller which communicates with the current sensor every frame period and includes a second controller controlling the image data or the power supply based on the first current data and the second current data,
wherein the second controller includes a global current manager which controls a grayscale of the image data based on the average sensing current of the first current data, the average sensing current of the second current data, and a load of the image data.