US 11,749,178 B2
Display device for providing test data signals of different voltage levels to different areas of a display panel in a test mode
Jinsung An, Gwacheon-si (KR); Sungho Kim, Suwon-si (KR); Seokje Seong, Seongnam-si (KR); Minwoo Woo, Seoul (KR); Wangwoo Lee, Osan-si (KR); and Jiseon 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. 13, 2021, as Appl. No. 17/548,870.
Claims priority of application No. 10-2021-0053950 (KR), filed on Apr. 26, 2021.
Prior Publication US 2022/0343836 A1, Oct. 27, 2022
Int. Cl. G09G 3/32 (2016.01); G09G 3/00 (2006.01)
CPC G09G 3/32 (2013.01) [G09G 3/006 (2013.01); G09G 2300/0439 (2013.01); G09G 2310/08 (2013.01); G09G 2330/12 (2013.01); G09G 2340/0435 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A display device, comprising:
a display panel including a plurality of pixels respectively connected to a corresponding data line of a plurality of data lines and a corresponding scan line of a plurality of scan lines; and
a test circuit electrically connected to the data lines, and
wherein the display panel includes a first area having a first light transmittance and a second area having a second light transmittance,
wherein the plurality of pixels includes a first pixel disposed in the first area and a second pixel disposed in the second area,
wherein the test circuit provides a first test data signal to a data line connected to the first pixel among the plurality of data lines in a bias frame, and provides a second test data signal to a data line connected to the second pixel among the plurality of data lines in the bias frame,
wherein a voltage level of the first test data signal is different from a voltage level of the second test data signal during the bias frame such that a luminance change of the display device has a curved shape in the bias frame similar to that of a driving frame, and
wherein the driving frame and the bias frame are alternately repeated in a single frame.