US 11,862,097 B2
Display device and method of performing an over-current protecting operation thereof
Sanghyun Lee, Seongnam-si (KR); Dae-Sik Lee, Hwaseong-si (KR); Keunoh Kang, Uijeongbu-si (KR); Siduk Sung, Hwaseong-si (KR); and Songyi Han, Asan-si (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by Samsung Display Co., Ltd., Yongin-Si (KR)
Filed on Dec. 23, 2022, as Appl. No. 18/087,902.
Claims priority of application No. 10-2022-0040985 (KR), filed on Apr. 1, 2022.
Prior Publication US 2023/0317013 A1, Oct. 5, 2023
Int. Cl. G09G 3/3258 (2016.01); G09G 3/00 (2006.01)
CPC G09G 3/3258 (2013.01) [G09G 3/006 (2013.01); G09G 2330/021 (2013.01); G09G 2330/04 (2013.01); G09G 2330/045 (2013.01); G09G 2330/12 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A display device comprising:
a display panel including a pixel circuit;
a display panel driving circuit configured to drive the display panel;
a voltage generating circuit configured to receive an input power supply voltage when the display device is powered on, and generate display panel voltages for driving the display panel and driving circuit voltages for driving the display panel driving circuit based on the input power supply voltage; and
an over-current protecting circuit configured to monitor an over-current generated inside the display device, and generate a shut-down request signal for shutting down at least one of the display panel, the display panel driving circuit, and the voltage generating circuit when the over-current is detected,
wherein the voltage generating circuit is configured to output an initialization voltage for initializing an initialization target node in the pixel circuit at a first time point corresponding to a time point at which the input power supply voltage is received,
wherein the display panel driving circuit is configured to output a scan clock signal for generating a scan signal that is to be applied to the pixel circuit at a second time point that is later than the first time point, and
wherein the over-current protecting circuit is configured to perform a first over-current protecting operation of detecting whether an initialization voltage current caused by the initialization voltage is the over-current in a power-on monitoring period that is set between the first time point and the second time point.