	US 12,282,629 B2
	Touch scanning method and display module
Yankai Gao, Guangdong (CN); and Zhijia Cui, Guangdong (CN)
Assigned to GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Guangdong (CN)
Filed by GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Guangdong (CN)
Filed on May 22, 2023, as Appl. No. 18/321,761.
Application 18/321,761 is a continuation of application No. PCT/CN2021/123572, filed on Oct. 13, 2021.
Claims priority of application No. 202011329400.9 (CN), filed on Nov. 24, 2020.
Prior Publication US 2023/0297190 A1, Sep. 21, 2023
Int. Cl. G09G 3/32 (2016.01); G06F 3/041 (2006.01); G09G 3/3208 (2016.01); G09G 3/20 (2006.01); G09G 3/36 (2006.01); H10K 59/12 (2023.01); H10K 59/40 (2023.01)

CPC G06F 3/04184 (2019.05) [G09G 3/3208 (2013.01); G06F 3/0416 (2013.01); G09G 3/2096 (2013.01); G09G 3/3666 (2013.01); G09G 2310/08 (2013.01); G09G 2330/021 (2013.01); G09G 2340/0435 (2013.01); G09G 2354/00 (2013.01); H10K 59/12 (2023.02); H10K 59/40 (2023.02)]

14 Claims

1. A touch scanning method, implemented to a touch panel driver integrated circuit (TPIC) chip of a display screen, wherein the method comprises:

receiving an emission synchronization signal sent by a display driver integrated circuit (DDIC) chip, wherein the emission synchronization signal is synchronized with an emission (EM) signal controlled by the DDIC chip;

receiving a vertical synchronization signal sent by the DDIC chip;

determining an image scanning interval and a non-image scanning interval of the DDIC chip, based on the vertical synchronization signal;

performing continuous touch scanning according to a touch scanning frequency with the emission synchronization signal as a synchronization reference, and obtaining a first touch signal in the image scanning interval and a second touch signal in the non-image scanning interval, wherein a time point of the touch scanning is aligned with a time point of the emission synchronization signal being received; and

filtering the first touch signal and the second touch signal.