US 12,468,426 B2
Touch display panel and method for measuring touch point thereof
Zengjian Jin, Wuhan (CN); and Yalong Ma, Wuhan (CN)
Assigned to WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGIES CO., LTD., Wuhan (CN)
Appl. No. 17/618,945
Filed by WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD., Wuhan (CN)
PCT Filed Nov. 30, 2021, PCT No. PCT/CN2021/134202
§ 371(c)(1), (2) Date Dec. 14, 2021,
PCT Pub. No. WO2023/087382, PCT Pub. Date May 25, 2023.
Claims priority of application No. 202111373156.0 (CN), filed on Nov. 19, 2021.
Prior Publication US 2024/0061528 A1, Feb. 22, 2024
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01)
CPC G06F 3/04186 (2019.05) [G06F 3/0446 (2019.05); G06F 2203/04104 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A touch display panel comprising:
a first display region and a second display region adjacently arranged, a first sub-display region located in the first display region being adjacent to a second sub-display region located in the second display region;
a plurality of first touch electrode blocks separately disposed in a first layer and arranged in an array of multiple rows and multiple columns in the first display region and the second display region, each of the first touch electrode blocks corresponding to a touch point; and
at least two touch chips comprising a first touch chip and a second touch chip, the first touch chip being connected to the first touch electrode blocks located in the first display region and the second sub-display region respectively, the second touch chip being connected to the first touch electrode blocks located in the second display region and the first sub-display region respectively, wherein coordinates of touch points located in the first sub-display region and the second sub-display region are measured by the first touch chip and the second touch chip, respectively;
wherein the first touch chip is configured to obtain first changes in capacitance values of touch points located in the first display region and the second sub-display region, and the second touch chip is configured to obtain second changes in capacitance values of touch points located in the second display region and the first sub-display region;
the second touch chip is configured to determine actual changes in the capacitance values of the touch points located in the first sub-display region according to a comparison between the first changes in the capacitance values of the touch points located in the first sub-display region obtained by the first touch chip and the second changes in the capacitance values of the touch points located in the first sub-display region obtained by the second touch chip, respectively;
the second touch chip is configured to determine a coordinate of a first target touch point located in the second sub-display region according to the actual changes in the capacitance values of the touch points located in the first sub-display region determined by the second touch chip, and further according to the changes in the capacitance values of the touch points located in the second display region obtained by the second touch chip; and
for each respective touch point of the touch points located in the first sub-display region, in response to determining that a difference between a first change in a capacitance value of the respective touch point located in the first sub-display region obtained by the first touch chip and a second change in a capacitance value of the respective touch point located in the first sub-display region obtained by the second touch chip is greater than a preset threshold, the second touch chip is configured to use an average of the first change in the capacitance value of the respective touch point located in the first sub-display region obtained by the first touch chip and the second change in the capacitance value of the respective touch point located in the first sub-display region obtained by the second touch chip as an actual change in the capacitance value of the respective touch point located in the first sub-display region to determine the coordinate of the first target touch point located in the second sub-display region.