US 11,721,278 B2
Light emitting display apparatus for sensing characteristic change of stage and supplying compensation signal to compensate for same
Subin Kim, Paju-si (KR); and MyungHo Ban, Paju-si (KR)
Assigned to LG DISPLAY CO., LTD., Seoul (KR)
Filed by LG DISPLAY CO., LTD., Seoul (KR)
Filed on Dec. 22, 2021, as Appl. No. 17/559,799.
Claims priority of application No. 10-2020-0189828 (KR), filed on Dec. 31, 2020.
Prior Publication US 2022/0208081 A1, Jun. 30, 2022
Int. Cl. G09G 3/32 (2016.01)
CPC G09G 3/32 (2013.01) [G09G 2300/0413 (2013.01); G09G 2310/0286 (2013.01); G09G 2310/061 (2013.01); G09G 2330/12 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A light emitting display apparatus comprising:
a gate driver including a plurality of stages connected with a plurality of gate lines provided in a display area and a dummy stage connected with a plurality of dummy gate lines provided in a non-display area;
a sensing unit connected with the dummy stage connected with at least two dummy gate lines provided in the non-display area; and
a controller connected with the sensing unit,
wherein each of the plurality of stages sequentially outputs at least two gate pulses to at least two gate lines, and each of the at least two gate lines is connected to a switching transistor provided in the display area,
wherein the dummy stage sequentially outputs at least two gate pulses to the at least two dummy gate lines,
wherein the sensing unit senses a voltage of a Q node to which a Q node signal for allowing the at least two gate pulses to be output from the dummy stage is supplied,
wherein the controller supplies a compensation signal based on the voltage of the Q node to the plurality of stages,
wherein each of the plurality of stages and the dummy stage includes a signal output unit for sequentially outputting at least two gate pulses in accordance with the Q node signal, and
wherein the signal output unit includes:
a compensation transistor including a first terminal connected with the controller and supplied with a compensation signal transmitted from the controller to the Q node; and
a compensation capacitor connected between a second terminal of the compensation transistor and the Q node.