US 12,293,041 B2
Display device having touch sensor and method of driving same
Kil Tae Kim, Paju-si (KR); and Sung Su Han, Paju-si (KR)
Assigned to LG Display Co., Ltd., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Jul. 31, 2023, as Appl. No. 18/362,878.
Claims priority of application No. 10-2022-0184530 (KR), filed on Dec. 26, 2022.
Prior Publication US 2024/0211073 A1, Jun. 27, 2024
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01); G09G 3/20 (2006.01); G09G 3/36 (2006.01)
CPC G06F 3/0418 (2013.01) [G06F 3/0412 (2013.01); G06F 3/044 (2013.01); G09G 3/2096 (2013.01); G09G 3/36 (2013.01); G09G 2354/00 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A display device having a touch sensor, comprising:
a display panel including a touch sensor configured to display an image and sense presence or absence of a touch;
a driver configured to time-division drive the display panel and the touch sensor; and
a controller configured to control the driver,
wherein in operation the driver outputs a set voltage during a transition period between a display period in which an image is displayed on the display panel and a touch sensing period in which the touch sensor senses, the set voltage being a last data voltage output from the driver for displaying the image based on the last data voltage before the transition period,
wherein the driver includes:
a first output circuit configured to output a data voltage;
a second output circuit configured to output the set voltage;
a third output circuit configured to output a load free signal; and
a selector configured to selectively connect one of the first output circuit, the second output circuit, and the third output circuit to a data line of the display panel, and
wherein the last data voltage is a voltage that maintains a previous image.