US 12,223,863 B2
Display panel and display device including the same
Hai-Jung In, Seoul (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Gyeonggi-Do (KR)
Filed by Samsung Display Co., Ltd., Yongin-si (KR)
Filed on Sep. 6, 2022, as Appl. No. 17/903,468.
Claims priority of application No. 10-2021-0144260 (KR), filed on Oct. 27, 2021.
Prior Publication US 2023/0129192 A1, Apr. 27, 2023
Int. Cl. G09G 3/00 (2006.01); G09G 3/32 (2016.01)
CPC G09G 3/006 (2013.01) [G09G 3/32 (2013.01); G09G 2310/0278 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A display panel, comprising:
a pixel connected to a scan line and a data line; and
a lighting test circuit which provides a lighting test voltage to the pixel through the data line,
wherein the lighting test circuit includes:
a first test transistor including a first electrode which receives the lighting test voltage, a second electrode, and a gate electrode which receives a first test control signal; and
a second test transistor including a first electrode connected to the second electrode of the first test transistor, a second electrode connected to the data line, and a gate electrode which receives a second test control signal,
wherein the image display period includes a plurality of frame periods that each include a data write period in which the data voltage is written to the data line and a data porch period in which the data voltage is not written to the data line, and
wherein during the data write period only one of the first test control signal and the second test control signal has a high voltage and during at least a portion of the data porch period both the first test control signal and the second test control signal simultaneously have a low voltage.