Electronic device having control chip for detecting different types of touch objects

Patent metadata

Field	Value
Publication number	US-12373066-B2
Application number	US-202418610277-A
Country	US
Kind code	B2
Filing date	Mar 20, 2024
Priority date	Nov 28, 2023
Publication date	Jul 29, 2025
Grant date	Jul 29, 2025

Abstract

The present disclosure provides an electronic device including a touch sensing device, a control chip and a post operation system. The touch sensing device is used to output a detection signal associated with an object. The control chip is used to identify a contact area, a contact position, an operation status of the object according to the detection signal to send a corresponding report packet to the post operation system. When identifying that the contact area changes from a small area to a large area, the control chip actively sends a reset report packet to reset a current operation status to an initial contact.

First claim

What is claimed is:

1. An electronic device, comprising:
a control chip, configured to
receive a detection signal,
identify a first type and a second type of an object on a sensing surface of a touch sensing device according to the detection signal, and send report packets at a report period, and
automatically send a reset report packet in response to the object changing from the first type to the second type, the reset report packet comprising a first report packet and a second report packet, the first report packet comprising (a first object ID code, a leaving tip code), and the second report packet comprising (a second object ID code, a non-leaving tip code),

wherein the object does not leave the sensing surface of the touch sensing device when the control chip is sending the reset report packet,
the first type is a contact area of the object on the sensing surface being smaller than a first area threshold, and the second type is the contact area being larger than a second area threshold, and
the first area threshold is different from the second area threshold.

2. The electronic device as claimed in claim 1 , wherein
the first report packet further comprises a first position coordinate of the sensing surface,
the second report packet further comprises a second position coordinate of the sensing surface, and
the first position coordinate is identical to the second position coordinate.

3. The electronic device as claimed in claim 1 , wherein the control chip is configured to
identify the object changing from the first type to the second type at a first time, and
send the reset report packet at a second time, which is separated from the first time by a predetermined number of report periods.

4. The electronic device as claimed in claim 1 , wherein the control chip is configured to
identify the object changing from the first type to the second type at a first time, and
send the reset report packet at the first time.

5. The electronic device as claimed in claim 4 , wherein the first report packet further comprises a second type code and the second report packet further comprises the second type code.

6. The electronic device as claimed in claim 4 , wherein the first report packet further comprises a first type code and the second report packet further comprises a second type code.

7. An electronic device, comprising:
a control chip, configured to
receive a detection signal,
identify a first type and a second type of an object on a sensing surface of a touch sensing device according to the detection signal, and send report packets at a report period, and
automatically send a reset report packet when the object is identified as the second type for the first time, wherein the reset report packet indicates that the object leaves the sensing surface and a second object having the second type touches the sensing surface,

wherein the object does not leave the sensing surface of the touch sensing device when the control chip is sending the reset report packet, and
the first type is a contact area of the object on the sensing surface being smaller than a first area threshold, and the second type is the contact area being larger than a second area threshold.

8. The electronic device as claimed in claim 7 , wherein an object ID code of the object before and after being identified as the second type for the first time is changed or not changed.

9. The electronic device as claimed in claim 8 , wherein the object having the object ID code is identified as the first type by the control chip before being identified as the second type for the first time.

10. The electronic device as claimed in claim 7 , wherein the first area threshold is different from the second area threshold.

11. The electronic device as claimed in claim 7 , wherein the second object is the same object as the object.

12. The electronic device as claimed in claim 7 , wherein the reset report packet comprises a position coordinate of the sensing surface, and the position coordinates of the object and the second object are identical.

13. An electronic device, comprising:
a control chip, configured to
receive a detection signal,
identify a first type and a second type of an object on a sensing surface of a touch sensing device according to the detection signal, and send report packets at a report rate, and
automatically send a reset report packet to reset the object as an initial contact in response to the object changing from the first type to the second type, the reset report packet comprising a first report packet and a second report packet, the first report packet comprising a leaving tip code, and the second report packet comprising a non-leaving tip code,

wherein the object does not leave the sensing surface of the touch sensing device when the control chip is sending the reset report packet,
the first report packet further comprises a first position coordinate of the sensing surface,
the second report packet further comprises a second position coordinate of the sensing surface, and
the first position coordinate is identical to or different from the second position coordinate.

14. The electronic device as claimed in claim 13 , wherein
the first report packet further comprises a first object ID code,
the second report packet further comprises a second object ID code, and
the second object ID code is identical to or different from the first object ID code.

15. The electronic device as claimed in claim 13 , wherein
the first report packet further comprises a first type code,
the second report packet further comprises a second type code, and
the second type code is identical to or different from the first type code.

16. The electronic device as claimed in claim 13 , wherein the control chip is configured to send the first report packet and the second report packet at an identical report time or at different report times.

17. The electronic device as claimed in claim 13 , wherein the control chip is configured to
the first type is a contact area of the object on the sensing surface being smaller than a first area threshold, and the second type is the contact area being larger than a second area threshold,
identify the object changing from the first type to the second type at a first report time, and
send the first report packet at the first report time or at a report time behind the first report time.

Assignees

• Pixart Imaging Inc

Inventors

• Su Tse-Chung

Classifications

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · CPC title

• G06F1/1633 Primary

  Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626 · CPC title

• G06F3/04186 Primary

  Touch location disambiguation · CPC title