Touch sampling control module and method, and display touch device

Patent metadata

Field	Value
Publication number	US-12265676-B2
Application number	US-202218553556-A
Country	US
Kind code	B2
Filing date	Nov 30, 2022
Priority date	Nov 30, 2022
Publication date	Apr 1, 2025
Grant date	Apr 1, 2025

Abstract

A touch sampling control module, a touch sampling control module method, and a display touch device. The touch sampling control module includes a touch sampling flag generation circuitry and a sampling time control circuitry. The touch sampling flag generation circuitry is configured to generate a touch sampling flag in accordance with a fluctuation time point of a data voltage applied to a touch display panel. The sampling time control circuitry is configured to control a touch sampling time in accordance with the touch sampling flag, so that the touch sampling time is different from the fluctuation time point of the data voltage. The data voltage fluctuates when an absolute value of a voltage change of the data voltage is larger than a voltage change threshold.

First claim

What is claimed is:

1. A touch sampling control module for a display touch device, wherein the display touch device comprises a touch display panel, and the touch sampling control module comprises a touch sampling flag generation circuitry and a sampling time control circuitry,
wherein the touch sampling flag generation circuitry is configured to generate a touch sampling flag in accordance with a fluctuation time point of a data voltage applied to the touch display panel, the sampling time control circuitry is configured to control a touch sampling time in accordance with the touch sampling flag so that the touch sampling time is different from the fluctuation time point of the data voltage, and the data voltage fluctuates when an absolute value of a voltage change of the data voltage is larger than a voltage change threshold.

2. The touch sampling control module according to claim 1 , wherein the display touch device further comprises a display driving integrated circuitry, the touch sampling flag generation circuitry is configured to receive a data voltage fluctuation indication signal from the display driving integrated circuitry and set the data voltage fluctuation indication signal as the touch sampling flag, and the data voltage fluctuation indication signal indicates the fluctuation time point of the data voltage.

3. The touch sampling control module according to claim 2 , wherein the display touch device further comprises a touch integrated circuitry, and the touch sampling flag generation circuitry and the sampling time control circuitry are integrated in the touch integrated circuitry.

4. The touch sampling control module according to claim 1 , wherein the display touch device further comprises a display driving integrated circuitry, the touch sampling flag generation circuitry comprises a conversion sub-circuitry and a clock memory, the conversion sub-circuitry is configured to receive a data voltage fluctuation indication signal from the display driving integrated circuitry, convert the data voltage fluctuation indication signal into a corresponding timing sequence signal and provide the timing sequence signal to the clock memory, the data voltage fluctuation indication signal indicates the fluctuation time point of the data voltage, the clock memory is configured to store therein the timing sequence signal, and the touch sampling flag is the timing sequence signal.

5. The touch sampling control module according to claim 4 , wherein the display touch device further comprises a touch integrated circuitry, and the sampling time control circuitry is integrated in the touch integrated circuitry.

6. The touch sampling control module according to claim 2 , wherein the data voltage fluctuation indication signal is a frame synchronization signal or a row synchronization signal.

7. The touch sampling control module according to claim 1 , further comprising a data voltage application circuitry configured to control the quantity of fluctuations of the data voltage to be smaller than a fluctuation threshold within a display period.

8. A touch sampling control method for a display touch device, wherein the display touch device comprises a touch display panel, and a touch sampling control module comprises a touch sampling flag generation circuitry and a sampling time control circuitry, wherein the touch sampling control method comprises:
generating, by the touch sampling flag generation circuitry, a touch sampling flag in accordance with a fluctuation time point of a data voltage applied to the touch display panel; and
controlling, by the sampling time control circuitry, a touch sampling time in accordance with the touch sampling flag so that the touch sampling time is different from the fluctuation time point of the data voltage,
wherein the data voltage fluctuates when an absolute value of a voltage change of the data voltage is larger than a voltage change threshold.

9. The touch sampling control method according to claim 8 , wherein the controlling, by the sampling time control circuitry, the touch sampling time in accordance with the touch sampling flag so that the touch sampling time is different from the fluctuation time point of the data voltage, comprises controlling, by the sampling time control circuitry, the touch sampling time to be located after the fluctuation time point of the data voltage and controlling a time interval between the touch sampling time and the fluctuation time point of the data voltage to be greater than a time threshold in accordance with the touch sampling flag.

10. The touch sampling control method according to claim 8 , wherein the controlling, by the sampling time control circuitry, the touch sampling time in accordance with the touch sampling flag so that the touch sampling time is different from the fluctuation time point of the data voltage comprises controlling, by the sampling time control circuitry, the touch sampling time to be located before the fluctuation time point of the data voltage and controlling a time interval between the touch sampling time and the fluctuation time point of the data voltage to be greater than a time threshold in accordance with the touch sampling flag.

11. The touch sampling control method according to claim 9 , wherein the time threshold is Tz/N, where Tz represents one frame, and N represents the total quantity of rows of pixel circuitries in the display touch device.

12. The touch sampling control method according to claim 8 , wherein the display touch device further comprises a display driving integrated circuitry, wherein the generating, by the touch sampling flag generation circuitry, the touch sampling flag in accordance with the fluctuation time point of the data voltage applied to the touch display panel comprises receiving, by the touch sampling flag generation circuitry, a data voltage fluctuation indication signal from the display driving integrated circuitry and setting the data voltage fluctuation indication signal as the touch sampling flag, and the data voltage fluctuation indication signal indicates the fluctuation time point of the data voltage.

13. The touch sampling control method according to claim 8 , wherein the display touch device further comprises a display driving integrated circuitry, and the touch sampling flag generation circuitry comprises a conversion sub-circuitry and a clock memory,
wherein the generating, by the touch sampling flag generation circuitry, the touch sampling flag in accordance with the fluctuation time point of the data voltage applied to the touch display panel comprises receiving, by the conversion sub-circuitry, a data voltage fluctuation indication signal from the display driving integrated circuitry, converting the data voltage fluctuation indication signal into a corresponding timing sequence signal, and providing the timing sequence signal to the clock memory, the data voltage fluctuation indication signal indicates the fluctuation time point of the data voltage, the clock memory is configured to store therein the timing sequence signal, and the touch sampling flag is the timing sequence signal.

14. The touch sampling control method according to claim 12 , wherein the data voltage fluctuation indication signal is a frame synchronization signal or a row synchronization signal.

15. The touch sampling control method according to claim 8 , wherein the touch sampling control module further comprises a data voltage application circuitry, and the touch sampling control method further comprises controlling, by the data voltage application circuitry, the quantity of fluctuations of the data voltage to be smaller than

Assignees

• Chengdu Boe Optoelect Tech Co
• Boe Technology Group Co Ltd

Inventors

• Luo Ping
• Zhang Guiyu
• Wang Zhiqiang
• Min Hang

Classifications

• G06F3/04184

  Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally · CPC title

• G06F3/041

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• G09G3/3208

  organic, e.g. using organic light-emitting diodes [OLED] · CPC title

• G06F3/044

  by capacitive means · CPC title

• G06F3/04166 Primary

  Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving (Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184) · CPC title