US 11,869,447 B2
Light emitting display device including data voltage output circuits one of which pre-charges a reference line and driving method thereof
Jae Ik Yoo, Seoul (KR); Jae Yoon Bae, Seoul (KR); and Seok Hyun Hong, Gimpo-si (KR)
Assigned to LG Display Co., Ltd., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Dec. 27, 2021, as Appl. No. 17/562,414.
Claims priority of application No. 10-2020-0189763 (KR), filed on Dec. 31, 2020.
Prior Publication US 2022/0208129 A1, Jun. 30, 2022
Int. Cl. G09G 3/3291 (2016.01); G09G 3/00 (2006.01); G09G 3/3258 (2016.01)
CPC G09G 3/3291 (2013.01) [G09G 3/006 (2013.01); G09G 3/3258 (2013.01); G09G 2330/12 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A light emitting display device comprising:
a display panel configured to display an image; and
a data driver comprising a panel driving circuit and a panel sensing circuit, the panel driving circuit including a plurality of data voltage output circuits configured to drive the display panel, and the panel sensing circuit configured to sense the display panel through a reference line,
wherein a first data voltage output circuit from the plurality of data voltage output circuits outputs a pre-charge voltage to the reference line to pre-charge,
wherein the data driver further comprises at least one switch configured to transfer a voltage output from a second data voltage output circuit from the plurality of data voltage output circuits to a data channel corresponding to a first data voltage output circuit from the plurality of data voltage output circuits while the first data voltage output circuit outputs the pre-charge voltage to the reference line, and
wherein the pre-charge voltage charged on the reference line of the display panel is applied to a sensing node of a sub-pixel to be sensed.