Electronic device with touch control

Patent metadata

Field	Value
Publication number	US-2025321659-A1
Application number	US-202519250070-A
Country	US
Kind code	A1
Filing date	Jun 26, 2025
Priority date	Nov 28, 2023
Publication date	Oct 16, 2025
Grant date	—

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 from a touch sensing device,
identify a first type and a second type of an object on a sensing surface of the touch sensing device according to the detection signal, wherein 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
in response to the object changing from the first type to the second type, identify a first object leaving the sensing surface of the touch sensing device and a second object directly touching the sensing surface of the touch sensing device,
wherein the object does not leave the sensing surface of the touch sensing device between changing from the first type to the second type.

2 . The electronic device as claimed in claim 1 , wherein the first object has the second type and the second object has the second type. ( FIGS. 3 A- 3 B and 4 A- 4 B )

3 . The electronic device as claimed in claim 2 , wherein the control chip is configured to
send a first report packet indicating the first object leaving the sensing surface, send a second report packet indicating the second object directly touching sensing surface, and the first report packet and the second report packet are sent at a same report time. ( FIGS. 3 A- 3 B )

4 . The electronic device as claimed in claim 2 , wherein the control chip is configured to
send a first report packet indicating the first object leaving the sensing surface, send a second report packet indicating the second object directly touching sensing surface, and the first report packet and the second report packet are sent at different report times. ( FIGS. 4 A- 4 B )

5 . The electronic device as claimed in claim 1 , wherein the first object has the first type and the second object has the second type. ( FIGS. 3 C and 4 C )

6 . The electronic device as claimed in claim 5 , wherein the control chip is configured to
send a first report packet indicating the first object leaving the sensing surface, send a second report packet indicating the second object directly touching sensing surface, and the first report packet and the second report packet are sent at a same report time. ( FIG. 3 C )

7 . The electronic device as claimed in claim 5 , wherein the control chip is configured to
send a first report packet indicating the first object leaving the sensing surface, send a second report packet indicating the second object directly touching sensing surface, and the first report packet and the second report packet are sent at different report times. ( FIG. 4 C )

8 . The electronic device as claimed in claim 1 , wherein the first object and the second object have a same object ID code. ( FIGS. 4 A- 4 C )

9 . The electronic device as claimed in claim 1 , wherein the first object and the second object have different ID codes. ( FIGS. 3 A- 3 C )

10 . The electronic device as claimed in claim 1 , wherein the control chip is configured to send one reset report packet to indicate the first object leaving the sensing surface and the second object directly touching sensing surface. ( FIGS. 3 A- 3 C )

11 . The electronic device as claimed in claim 10 , wherein a report time of sending the one reset report packet is identical to a time of detecting the object changing from the first type to the second type. ( FIGS. 3 B- 3 C )

12 . The electronic device as claimed in claim 10 , wherein a report time of sending the one report packet is later than a time of detecting the object changing from the first type to the second type. ( FIG. 3 A )

13 . The electronic device as claimed in claim 1 , wherein the control chip is configured to send two successive report packets to indicate the first object leaving the sensing surface and the second object directly touching sensing surface. ( FIGS. 4 A- 4 C )

14 . The electronic device as claimed in claim 13 , wherein a report time of sending a first of the two successive reset report packets is identical to a time of detecting the object changing from the first type to the second type. ( FIGS. 4 B- 4 C )

15 . The electronic device as claimed in claim 13 , wherein a report time of sending a first of the two successive reset report packets is later than a time of detecting the object changing from the first type to the second type. ( FIGS. 4 B- 4 C )

16 . The electronic device as claimed in claim 1 , wherein the second area threshold is larger than the first area threshold.

17 . An electronic device, comprising:
a control chip, configured to
receive a detection signal from a touch sensing device,
identify a first type and a second type of an object on a sensing surface of the touch sensing device according to the detection signal, wherein 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
in response to the object being identified as the second type for the first time, indicate a first object leaving the sensing surface of the touch sensing device and a second object directly touching the sensing surface of the touch sensing device,
wherein the object does not actually leave the sensing surface upon indicating the first object leaving the sensing surface.

18 . The electronic device as claimed in claim 17 , wherein
the first object has the first type or the second type, and the second object has the second type.

19 . An electronic device, comprising:
a control chip, configured to
receive a detection signal from a touch sensing device,
identify a first type and a second type of at least one object on a sensing surface of the touch sensing device according to the detection signal, wherein 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,
generate a first report packet comprising a first object ID code, a first type code and a first tip code associated with a first object upon the first object appearing on the sensing surface,
generate a second report packet comprising a second object ID code, a second type code and a second tip code associated with a second object upon the second object appearing on the sensing surface together with the first object, and
report only one of the first report packet and the second report packet to a post operation system upon both the first type code and the second type code indicating the second type as well as both the first tip code and the second tip code indicating not leaving,
wherein one of the first object and the second object associated with the one of the first report packet and the second report packet not being reported to the post operation system does not leave the sensing surface upon the associated report packet thereof not being reported.

20 . The electronic device as claimed in claim 19 , wherein the control chip is further configured to
report both of the first report packet and the second report packet to the post operation system upon both the first tip code and the second tip code indicating not leaving as well as one of the first type code and the second type code indicating the first type but the other one of the first type code and the second type code indicating the

Assignees

• Pixart Imaging Inc

Inventors

• Su Tse-Chung

Classifications

• G06F2203/04104

  Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger · CPC title

• G06F3/04186 Primary

  Touch location disambiguation · CPC title

• G06F3/041661 Primary

  using detection at multiple resolutions, e.g. coarse and fine scanning; using detection within a limited area, e.g. object tracking window · CPC title