Touchscreen displays

Patent metadata

Field	Value
Publication number	US-12504848-B2
Application number	US-202418643358-A
Country	US
Kind code	B2
Filing date	Apr 23, 2024
Priority date	Nov 29, 2021
Publication date	Dec 23, 2025
Grant date	Dec 23, 2025

Abstract

An embodiment method for operating an electronic device includes transmitting, from a controller, a tearing effect (TE) signal to a touchscreen over a first period of time, the first period of time occurring during a first frame and having a duration that is shorter than a period of the first frame, the TE signal being configured to restrict image data from being displayed on the touchscreen during the first period of time; displaying the first frame of a plurality of frames of the image data on a display of the touchscreen over a second period of time within the period of the first frame other than during the first period of time; and detecting, at the controller, a first touch by performing a first self-sensing scan during the first period of time.

First claim

What is claimed is:

1 . A method for operating an electronic device, the method comprising:
generating a blank period of time in which a touchscreen is restricted from displaying an image in each of a plurality of frames, the blank period of time being shorter than a period of each of the plurality of frames; performing a vertical synchronization of the touchscreen during the blank period of time; and displaying the image in each of the plurality of frames, a brightness of the image displayed in each of the plurality of frames before and during the blank period of time being maintained by restricting a time duration for additional current draw for a self-sensing scan to fall within the blank period of time.

2 . The method of claim 1 , wherein generating the blank period of time comprises transmitting a tearing effect (TE) signal.

3 . The method of claim 2 , wherein the blank period of time distinguishes each of the plurality of frames.

4 . The method of claim 1 , further comprising transmitting a pen sensing uplink signal to an active stylus pen during the blank period of time in each of the plurality of frames.

5 . The method of claim 4 , further comprising sensing a pen downlink signal transmitted by the active stylus pen in response to the pen sensing uplink signal in each of the plurality of frames and after the blank period of time.

6 . The method of claim 1 , further comprising performing a mutual sensing scan after the blank period of time in each of the plurality of frames.

7 . The method of claim 1 , wherein the touchscreen is a flexible Organic Light-Emitting Diode (OLED) touchscreen.

8 . A device comprising:
a touchscreen; a controller; and a memory for storing a program to be executed by the controller, the program comprising instructions that, when executed, cause the controller to:
generate a blank period of time in which the touchscreen is restricted from displaying an image in each of a plurality of frames, the blank period of time being shorter than a period of each of the plurality of frames,
perform a vertical synchronization of the touchscreen during the blank period of time, and
display the image in each of the plurality of frames, a brightness of the image displayed in each of the plurality of frames before and during the blank period of time being maintained by restricting a time duration for additional current draw for a self-sensing scan to fall within the blank period of time.

9 . The device of claim 8 , wherein generating the blank period of time comprises transmitting a tearing effect (TE) signal.

10 . The device of claim 9 , wherein the blank period of time distinguishes each of the plurality of frames.

11 . The device of claim 8 , wherein the instructions, when executed, cause the controller to transmit a pen sensing uplink signal to an active stylus pen during the blank period of time in each of the plurality of frames.

12 . The device of claim 11 , wherein the instructions, when executed, cause the controller to sense a pen downlink signal transmitted by the active stylus pen in response to the pen sensing uplink signal in each of the plurality of frames and after the blank period of time.

13 . The device of claim 8 , wherein the instructions, when executed, cause the controller to perform a mutual sensing scan after the blank period of time in each of the plurality of frames.

14 . The device of claim 8 , wherein the touchscreen is a flexible Organic Light-Emitting Diode (OLED) touchscreen.

15 . A controller configured to:
generate a blank period of time in which a touchscreen is restricted from displaying an image in each of a plurality of frames, the blank period of time being shorter than a period of each of the plurality of frames; perform a vertical synchronization of the touchscreen during the blank period of time; and display the image in each of the plurality of frames, a brightness of the image displayed in each of the plurality of frames before and during the blank period of time being maintained by restricting a time duration for additional current draw for a self-sensing scan to fall within the blank period of time.

16 . The controller of claim 15 , wherein generating the blank period of time comprises transmitting a tearing effect (TE) signal.

17 . The controller of claim 16 , wherein the blank period of time distinguishes each of the plurality of frames.

18 . The controller of claim 15 , wherein the controller is configured to transmit a pen sensing uplink signal to an active stylus pen during the blank period of time in each of the plurality of frames.

19 . The controller of claim 18 , wherein the controller is configured to sense a pen downlink signal transmitted by the active stylus pen in response to the pen sensing uplink signal in each of the plurality of frames and after the blank period of time.

20 . The controller of claim 15 , wherein the controller is configured to perform a mutual sensing scan after the blank period of time in each of the plurality of frames.

Assignees

• St Microelectronics Asia Pacific Pte Ltd

Inventors

• Jeon Sang Hoon
• Hwang Myung Hyun
• Lee Sang Soo

Classifications

• G09G2354/00

  Aspects of interface with display user · CPC title

• G09G2320/0247

  Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes · CPC title

• G09G2310/08

  Details of timing specific for flat panels, other than clock recovery · CPC title

• G09G2300/0842

  forming a memory circuit, e.g. a dynamic memory with one capacitor · CPC title

• G09G3/3233

  with pixel circuitry controlling the current through the light-emitting element · CPC title