Electronic device control method and electronic device

Patent metadata

Field	Value
Publication number	US-12443313-B2
Application number	US-202418935677-A
Country	US
Kind code	B2
Filing date	Nov 4, 2024
Priority date	May 13, 2022
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

An electronic device control method is provided. The method may be applied to an electronic device having a touchscreen. A display drive circuit and a touch sensor that match the touchscreen are configured in the electronic device. The method includes: The display drive circuit performs pixel scan. The touch sensor collects a touch signal once after the display drive circuit scans S rows of pixels each time, where S≥1. Touch signals collected N consecutive times are used as one group. An uplink synchronization signal is transmitted to the outside in a slot for collecting a touch signal for the K th time in each group, where 1≤K≤N. The uplink synchronization signal is used to perform time alignment with an external device.

First claim

The invention claimed is:

1. An electronic device control method, applied to an electronic device having a touchscreen, wherein a display drive circuit and a touch sensor that match the touchscreen are configured in the electronic device, and the method comprises:
performing, by the display drive circuit, pixel scan;
collecting, by the touch sensor, touch signals, each touch signal for a set of S rows of pixels scanned by the display drive circuit, wherein S≥1, wherein each N consecutive touch signals form a group; and
transmitting an uplink synchronization signal in a slot corresponding to a K th touch signal in each group, 1≤K≤N, and the uplink synchronization signal indicates time alignment for an external device.

2. The method according to claim 1 , wherein S=H/N, and His a quantity of rows of pixels that the display drive circuit needs to scan when the touchscreen displays one frame of image at a standard frame rate.

3. The method according to claim 1 , wherein the slot for collecting the K th touch signal in each group is shorter than a slot for collecting a touch signal each time other than the K th time in each group.

4. The method according to claim 1 , wherein the method further comprises:
determining a total quantity of rows of pixels scanned by the display drive circuit between a first frame synchronization signal and a second frame synchronization signal, wherein the second frame synchronization signal is adjacent to the first frame synchronization signal and is a next frame synchronization signal after the first frame synchronization signal; and
when the total quantity of rows is less than a target quantity of rows, re-counting a quantity of rows of pixels scanned by the display drive circuit, wherein the target quantity of rows is a quantity of rows of pixels that need to be scanned by the display drive circuit to display one frame of an image at a target frame rate, and the target frame rate is a current display frame rate of the touchscreen.

5. The method according to claim 1 , wherein the method further comprises:
determining to establish a connection to a stylus; and
when the display drive circuit scans K*S rows of pixels for the first time after obtaining a frame synchronization signal, transmitting the uplink synchronization signal, wherein the uplink synchronization signal indicates time alignment to the stylus.

6. The method according to claim 5 , wherein the method further comprises:
obtaining, by the touch sensor, a downlink signal from the stylus; and
displaying, by the touchscreen, a touch position corresponding to the obtained downlink signal.

7. The method according to claim 5 , wherein the method further comprises:
when a connection to the stylus is established for the first time, sending a downlink parameter to the stylus, wherein
the downlink parameter comprises: an offset of a first downlink signal from a start position of the frame synchronization signal, a time interval between adjacent downlink signals, and a time required for each downlink signal.

8. The method according to claim 7 , wherein the time required for each downlink signal is longer than a slot for collecting a touch signal each time.

9. An electronic device, comprising:
a touchscreen;
a display drive circuit and a touch sensor that match the touchscreen;
at least one memory, storing a program; and
at least one processor, configured to execute the program stored in the memory, wherein when the program stored in the memory is executed, the processor is configured to perform following steps:
performing, by the display drive circuit, pixel scan;
collecting, by the touch sensor, touch signals, each touch signal for a set of S rows of pixels scanned by the display drive circuit, wherein S≥1, wherein each N consecutive touch signals form a group; and
transmitting an uplink synchronization signal in a slot corresponding to a K th touch signal in each group, 1≤K≤N, and the uplink synchronization signal indicates time alignment for an external device.

10. The electronic device according to claim 9 , wherein S=H/N, and H is a quantity of rows of pixels that the display drive circuit needs to scan when the touchscreen displays one frame of image at a standard frame rate.

11. The electronic device according to claim 9 , wherein the slot for collecting the K th touch signal in each group is shorter than a slot for collecting a touch signal each time other than the K th time in each group.

12. The electronic device according to claim 9 , wherein the steps further comprise:
determining a total quantity of rows of pixels scanned by the display drive circuit between a first frame synchronization signal and a second frame synchronization signal, wherein the second frame synchronization signal is adjacent to the first frame synchronization signal and is a next frame synchronization signal after the first frame synchronization signal; and
when the total quantity of rows is less than a target quantity of rows, re-counting a quantity of rows of pixels scanned by the display drive circuit, wherein the target quantity of rows is a quantity of rows of pixels that need to be scanned by the display drive circuit to display one frame of an image at a target frame rate, and the target frame rate is a current display frame rate of the touchscreen.

13. The electronic device according to claim 9 , wherein the steps further comprise:
determining to establish a connection to a stylus; and
when the display drive circuit scans K*S rows of pixels for the first time after obtaining a frame synchronization signal, transmitting the uplink synchronization signal, wherein the uplink synchronization signal indicates time alignment to the stylus.

14. The electronic device according to claim 13 , wherein the steps further comprise:
obtaining, by the touch sensor, a downlink signal from the stylus; and
displaying, by the touchscreen, a touch position corresponding to the obtained downlink signal.

15. The electronic device according to claim 13 , wherein the steps further comprise:
when a connection to the stylus is established for the first time, sending a downlink parameter to the stylus, wherein
the downlink parameter comprises: an offset of a first downlink signal from a start position of the frame synchronization signal, a time interval between adjacent downlink signals, and a time required for each downlink signal.

16. The electronic device according to claim 15 , wherein the time required for each downlink signal is longer than a slot for collecting a touch signal each time.

17. A non-transitory computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is run on an electronic device, the electronic device is enabled to perform the following steps:
performing, by the display drive circuit, pixel scan;
collecting, by the touch sensor, touch signals, each touch signal for a set of S rows of pixels scanned by the display drive circuit, wherein S≥1, wherein each N consecutive touch signals form a group; and
transmitting an uplink synchronization signal in a slot corresponding to a K th touch signal in each group, 1≤K≤N, and the uplink synchronization signal indicates time alignment for an external device.

18. The non-transitory computer-readable storage medium according to claim 17 , wherein S=H/N, and H is a quantity of rows of pixels that the display drive circuit needs to scan when the touchscreen displays one frame of image at a standard frame rate.

19. The n

Assignees

• Huawei Tech Co Ltd

Inventors

• Mo Jiabao
• Deng Kaifeng
• Zou Yang
• Zhang Junyong

Classifications

• G06F3/04162 Primary

  for exchanging data with external devices, e.g. smart pens, via the digitiser sensing hardware · CPC title

• G06F3/04166

  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

• G06F3/03545

  Pens or stylus · CPC title

• G06F3/0383

  Signal control means within the pointing device · CPC title

• G06F3/0441

  using active external devices, e.g. active pens, for receiving changes in electrical potential transmitted by the digitiser, e.g. tablet driving signals · CPC title