Stylus pen, antenna module, touch sensor, and electronic device

Patent metadata

Field	Value
Publication number	US-12422953-B2
Application number	US-202418659165-A
Country	US
Kind code	B2
Filing date	May 9, 2024
Priority date	Jan 22, 2020
Publication date	Sep 23, 2025
Grant date	Sep 23, 2025

Abstract

An embodiment of the present invention provides a display device including: a loop coil; a display unit configured to include a plurality of pixels; a display driver configured to apply a data signal and a scan signal to the pixels depending on a vertical synchronization signal and a horizontal synchronization signal; a plurality of touch electrodes positioned on the display unit; a driving receiver configured to apply a driving signal to the loop coil during a first period and to receive a sensing signal from at least one of the touch electrodes during a second period after the first period; and a controller configured to generate touch information by using the sensing signal, wherein the driving signal is synchronized to at least one pulse of the vertical synchronization signal and the horizontal synchronization signal.

First claim

The invention claimed is:

1. A touch device comprising:
a plurality of touch electrodes,
a loop coil; and
a touch module configured to
receive a detection signal from at least one of the plurality of touch electrodes;
apply a first driving signal and a second driving signal to the loop coil during a first section;
apply the first drive signal to one end of the loop coil and the second drive signal having an opposite phase to the first drive signal to the other end of the loop coil during a first section and
receive a detection signal from at least one of the plurality of touch electrodes during a second section after the first section;
wherein the plurality of touch electrodes are located on the same layer as the loop coil.

2. The touch device as claimed in claim 1 , wherein
the plurality of touch electrodes are located on the same layer as the loop coil.

3. The touch device as claimed in claim 1 , wherein
the loop coil and the plurality of touch electrodes include the same material.

4. The touch device as claimed in claim 1 , wherein
the loop coil includes a first wire and a second wire extending in a first direction, and a third wire extending in a second direction intersecting the first direction, and
a touch electrode extending in the first direction among the plurality of touch electrodes is located between the first wire and the second wire.

5. The touch device as claimed in claim 1 , wherein
the loop coil includes a plurality of antenna loops.

6. The touch device as claimed in claim 5 , wherein
the plurality of antenna loops include wires of the same width.

7. The touch device as claimed in claim 5 , wherein
the plurality of antenna loops include the same material.

8. The touch device as claimed in claim 1 , wherein
the amplitudes of the first driving signal and the second driving signal are substantially the same.

9. An electronic device comprising:
a display unit including a plurality of pixels;
a plurality of touch electrodes on the display unit,
an antenna loop on the display unit;
a touch module configured to
receive a detection signal from at least one of the plurality of touch electrodes;
apply a first driving signal and a second driving signal to the loop coil during a first section;
apply the first drive signal to one end of the antenna loop and the second drive signal having a different phase from the first driving signal to the other end of the antenna loop during a first section and
receive a detection signal from at least one of the plurality of touch electrodes during a second section after the first section;
wherein the plurality of touch electrodes are located on the same layer as the loop coil.

10. The electronic device as claimed in claim 9 , wherein
the plurality of touch electrodes are located on the same layer as the antenna loop.

11. The electronic device as claimed in claim 9 , wherein
the plurality of touch electrodes include the same material as the antenna loop.

12. The electronic device as claimed in claim 9 , wherein
the antenna loop includes a first wire and a second wire extending in a first direction, and a third wire extending in a second direction intersecting the first direction, and
a touch electrode extending in the first direction among the plurality of touch electrodes is located between the first wire and the second wire.

13. The electronic device as claimed in claim 9 , wherein
the amplitudes of the first driving signal and the second driving signal are substantially the same.

14. A touch system comprising:
a stylus pen including a resonant circuit; and
an electronic device including an antenna loop,
a plurality of touch electrodes, and
a touch module configured to
receive a detection signal from at least one of the plurality of touch electrodes;
apply a first driving signal and a second driving signal to the loop coil during a first section;
apply the first drive signal to one end of the antenna loop and the second drive signal having a different phase from the first driving signal to the other end of the antenna loop during a first section and
receive a detection signal from at least one of the plurality of touch electrodes during a second section after the first section;
wherein the plurality of touch electrodes are located on the same layer as the loop coil.

15. The touch system as claimed in claim 14 , wherein
the detection signal is generated by the resonance circuit based on a signal resonated by the first driving signal and the second driving signal.

Assignees

• Hideep Inc

Inventors

• Kim Seyeob
• Kim Bonkee
• Cho Youngho
• Woo Hyoungwook
• Jung Kiryoung
• Lee Hwanhee
• Lee Wonwoo
• Park Kyeonghan
• Lee Sein
• Seo Jeongwon
• Kim Jongsik
• Jeong Inuk
• Moon Hojun
• Ko Beomkyu

Classifications

• G06F3/0383

  Signal control means within the pointing device · CPC title

• G06F3/03545 Primary

  Pens or stylus · CPC title

• G06F3/04162

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

• G06F3/04164

  Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads · CPC title

• G06F3/0442

  using active external devices, e.g. active pens, for transmitting changes in electrical potential to be received by the digitiser · CPC title