Adaptive noise suppression for touch screen displays

Patent metadata

Field	Value
Publication number	US-12174682-B2
Application number	US-202318165166-A
Country	US
Kind code	B2
Filing date	Feb 6, 2023
Priority date	Feb 6, 2023
Publication date	Dec 24, 2024
Grant date	Dec 24, 2024

Abstract

An information handling system detects an initial insertion of an alternating current (AC) adapter, and determines an identifier associated with the AC adapter. The system may also determine a parameter for attenuating noise generated by the AC adapter based on the identifier, and attenuate the noise generated by the AC adapter by applying the parameter.

First claim

What is claimed is:

1. A method comprising:
detecting, by a processor, an initial insertion of an alternating current (AC) adapter;
determining an identifier associated with the AC adapter;
determining a parameter for filtering noise generated by the AC adapter based on the identifier; and
filtering the noise generated by the AC adapter by applying the parameter, wherein the filtering of the noise generated by the AC adapter includes adjusting a touch controller's analog front end frequency and digital filter integration time.

2. The method of claim 1 , wherein the determining of the parameter is performed by querying a lookup table stored in a non-volatile storage device.

3. The method of claim 2 , wherein the querying of the lookup table is performed by an embedded controller.

4. The method of claim 2 , wherein the lookup table includes a mapping of the parameter and a parameter value to the identifier associated with the AC adapter.

5. The method of claim 1 , wherein the determining of the parameter includes determining a value associated with the parameter.

6. The method of claim 1 , further comprising transmitting the parameter to a touch controller.

7. The method of claim 1 , wherein the determining of the parameter for attenuating the noise is performed using a lookup table.

8. The method of claim 1 , wherein the filtering of the noise generated by the AC adapter is performed by a notch filter embedded in a touch controller.

9. An information handling system, comprising:
a processor; and
a memory storing instructions that when executed cause the processor to perform operations comprising:
detecting an initial insertion of an alternating current (AC) adapter;
determining an identifier associated with the AC adapter;
determining a parameter for attenuating noise generated by the AC adapter based on the identifier; and
attenuating the noise generated by the AC adapter by applying the parameter, wherein the attenuating of the noise generated by the AC adapter is performed by a notch filter embedded in a touch controller.

10. The information handling system of claim 9 , wherein the determining of the parameter for attenuating the noise is performed using a lookup table.

11. The information handling system of claim 9 , wherein the determining of the parameter includes determining one or more values associated with the parameter.

12. The information handling system of claim 10 , wherein the lookup table includes a mapping of the parameter to the identifier.

13. The information handling system of claim 9 , further comprising transmitting the parameter to the touch controller.

14. The information handling system of claim 9 , wherein the attenuating of the noise generated by the AC adapter includes adjusting a touch controller's analog front end frequency and digital filter integration time.

15. The information handling system of claim 9 , wherein the determining of the parameter is performed by querying a lookup table stored in a non-volatile storage device.

16. A non-transitory computer-readable medium to store instructions that are executable to perform operations comprising:
detecting an initial insertion of an alternating current (AC) adapter;
determining an identifier associated with the AC adapter;
determining a parameter for filtering noise generated by the AC adapter based on the identifier; and
filtering the noise generated by the AC adapter by applying the parameter, wherein the filtering of the noise generated by the AC adapter includes adjusting a touch controller's analog front end frequency and digital filter integration time.

17. The non-transitory computer-readable medium of claim 16 , wherein the determining of the parameter for the filtering of the noise is performed by querying a lookup table.

18. The non-transitory computer-readable medium of claim 17 , wherein the lookup table includes a mapping of the parameter to the identifier.

19. The non-transitory computer-readable medium of claim 16 , the operations further comprising transmitting the parameter to a touch controller.

20. The non-transitory computer-readable medium of claim 16 , wherein the filtering of the noise generated by the AC adapter is performed by a notch filter embedded in a touch controller.

Assignees

• Dell Products Lp

Inventors

• Wu Chi-Che
• Yu Wei-Cheng
• Tan Geroncio Ong
• Liao Tsung-Cheng
• Chang Henry

Classifications

• G06F11/0793

  Remedial or corrective actions (recovery from an exception in an instruction pipeline G06F9/3861; by retry G06F11/1402; for recovering from a failure of a protocol instance or entity H04L69/40) · CPC title

• G06F11/002

  protecting against parasitic influences, e.g. noise, temperatures · CPC title

• G06F1/3218 Primary

  of display devices · CPC title