US 12,189,897 B2
Touch display device and method of operating the touch display device
Yinlong Zhang, Beijing (CN); Zhihua Sun, Beijing (CN); Pengfei Hu, Beijing (CN); Senwang Li, Beijing (CN); Yanping Liao, Beijing (CN); Xibin Shao, Beijing (CN); Xiaofeng Yin, Beijing (CN); Jiantao Liu, Beijing (CN); Kaiming Shi, Beijing (CN); and Jinling Zhang, Beijing (CN)
Assigned to BEIJING BOE DISPLAY TECHNOLOGY CO., LTD., Beijing (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Appl. No. 17/778,975
Filed by BEIJING BOE DISPLAY TECHNOLOGY CO., LTD., Beijing (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
PCT Filed Jun. 25, 2021, PCT No. PCT/CN2021/102256
§ 371(c)(1), (2) Date May 23, 2022,
PCT Pub. No. WO2022/266981, PCT Pub. Date Dec. 29, 2022.
Prior Publication US 2024/0168588 A1, May 23, 2024
Int. Cl. G06F 3/041 (2006.01)
CPC G06F 3/04184 (2019.05) [G06F 3/0412 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A touch display device, comprising:
a drive control circuit, the drive control circuit is configured to:
in a display phase, provide a common voltage signal to a common electrode in a pixel circuit of the touch display device;
in a touch phase, provide a touch drive signal to the common electrode, wherein a ratio of an average value of a high level and a low level of the touch drive signal to a value of the common voltage signal ranges from 0.8 to 1.2,
wherein the drive control circuit comprises a first circuit, and the first circuit comprises:
a common voltage signal input terminal, wherein the common voltage signal input terminal receives the common voltage signal;
a first input terminal, wherein the first input terminal receives a low-level signal with a value equal to the low level of the touch drive signal;
a second input terminal, wherein the second input terminal receives a high-level signal with a value equal to the high level of the touch drive signal:
a first output terminal for providing the common voltage signal or the touch drive signal to the common electrode; and
a first multiplexer, wherein the first multiplexer is coupled to the common voltage signal input terminal, the first input terminal, the second input terminal and the first output terminal, and is configured to:
in the display phase, provide the common voltage signal from the common voltage input terminal to the first output terminal, and
in the touch phase, provide the low-level signal from the first input terminal and the high-level signal from the second input terminal, alternately, to the first output terminal, as the touch drive signal.