US 12,282,629 B2 · Touch scanning method and display module

Abstract

A touch scanning method is used for a TPIC chip and includes: receiving a emission synchronization signal sent by a DDIC chip, the light emission synchronization signal being synchronized with an EM signal controlled by the DDIC chip; and by taking the emission synchronization signal as a synchronization reference, performing continuous touch scanning according to a touch scanning frequency, where a time point of the touch scanning is aligned with a time point at which the emission synchronization signal is received. The emission synchronization signal sent by the DDIC chip is synchronized with the EM signal, and the EM signal is stable, therefore upon the receipt of the emission synchronization signal, the TPIC chip can perform continuous touch scanning with the emission synchronization signal as the synchronization reference according to a stable touch scanning frequency, thereby facilitating the improvement of the identification rate and accuracy for a touch operation.

Claims14

Dependent claims

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.

3 more elements

A display module, wherein the display module comprises:

a display screen, a DDIC chip and a TPIC chip, and the DDIC chip is electrically connected with the TPIC chip;
wherein the DDIC chip is configured to send an emission synchronization signal to the TPIC chip;
the emission synchronization signal is synchronized with an EM signal;
and
wherein the TPIC chip is configured to receive the emission synchronization signal, and perform continuous touch scanning according to a touch scanning frequency with the emission synchronization signal as a synchronization reference;
and a time point of the touch scanning is aligned with a time point of the emission synchronization signal being received;
wherein the DDIC chip is further configured to send a vertical synchronization signal to the TPIC chip, and the TPIC chip is further configured to:
receive the vertical synchronization signal;
determine an image scanning interval and a non-image scanning interval of the DDIC chip, based on the vertical synchronization signal;
perform the continuous touch scanning according to the touch scanning frequency with the emission synchronization signal as the synchronization reference, and obtain a first touch signal in the image scanning interval and a second touch signal in the non-image scanning interval;
and
filter the first touch signal and the second touch signal.

9 more elements

Dependencies are inferred from the claim text.

Touch scanning method and display module

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Touch scanning method and display module

Life of this patent

Abstract

Claims14