Touch apparatus and driving method thereof

Patent metadata

Field	Value
Publication number	US-11481065-B2
Application number	US-202016893543-A
Country	US
Kind code	B2
Filing date	Jun 5, 2020
Priority date	Jun 11, 2019
Publication date	Oct 25, 2022
Grant date	Oct 25, 2022

Abstract

A touch apparatus according to an exemplary embodiment includes: a touch panel that is disposed on a display panel of a display device that drives a plurality of pixels according to a vertical synchronization signal and a horizontal synchronization signal, and includes a plurality of first touch electrodes for sensing a touch input in a first direction and a plurality of second touch electrode for sensing a touch input in a second direction; a driver/receiver that applies a driving signal to at least one of the plurality of first touch electrodes and the plurality of second touch electrodes during a first section, and receives a detection signal from at least one of the plurality of first touch electrodes and the plurality of second touch electrodes during a second section after the first section; and a controller that generates touch information by using the detection signal, wherein the driving signal is synchronized with at least one synchronization signal of the horizontal synchronization signal and the vertical synchronization signal.

First claim

What is claimed is:

1. A touch apparatus comprising:
a touch sensor that is disposed in a display area of a display device that drives a plurality of pixels according to a vertical synchronization signal and a horizontal synchronization signal, and includes a plurality of first touch electrodes for sensing a touch input in a first direction and a plurality of second touch electrode for sensing a touch input in a second direction;
a driver/receiver that applies a driving signal to at least one of the plurality of first touch electrodes and the plurality of second touch electrodes during a first section, and receives a detection signal from at least one of the plurality of first touch electrodes and the plurality of second touch electrodes during a second section after the first section; and
a controller that generates touch information by using the detection signal,
wherein the driving signal is synchronized with at least one synchronization signal of the horizontal synchronization signal and the vertical synchronization signal, and
wherein the driver/receiver receives the detection signal according to frequency of the driving signal synchronized with at least one of frequency of the horizontal synchronization signal and frequency of the vertical synchronization signal.

2. The touch apparatus of claim 1 , wherein the driver/receiver simultaneously applies the driving signal to at least one of the plurality of first touch electrodes and at least one of the plurality of second touch electrodes during the first section, and
receives a detection signal from at least one of the plurality of first touch electrodes and at least one of the plurality of second touch electrodes during the second section.

3. The touch apparatus of claim 1 , wherein the driving signal is synchronized with pulses of the horizontal synchronization signal of a predetermined cycle.

4. The touch apparatus of claim 1 , wherein the driving signal is synchronized with a pulse of the vertical synchronization signal for each frame of a predetermined cycle.

5. The touch apparatus of claim 1 , wherein a frequency of the driving signal is two or more integer times a frequency of the horizontal synchronization signal.

6. The touch apparatus of claim 1 , wherein the detection signal is received at a section determined corresponding to the horizontal synchronization signal.

7. The touch apparatus of claim 6 , wherein the section determined corresponding to the horizontal synchronization signal is a section other than a period during which a data signal is written into at least some of the plurality of pixels.

8. The touch apparatus of claim 7 , wherein the section determined corresponding to the horizontal synchronization signal is a period during which a scan signal applied to the plurality of pixels is a disable level.

9. The touch apparatus of claim 7 , wherein the section determined corresponding to the horizontal synchronization signal is a period during which a data signal is applied to at least one of a plurality of data lines connected to the plurality of pixels.

10. The touch apparatus of claim 1 , wherein the driver/receiver receives the detection signal according to the frequency of the driving signal synchronized only with the frequency of the horizontal synchronization signal.

11. The touch apparatus of claim 10 , wherein a receiving time of the detection signal at least comprises two times of which phases are opposite to each other within one cycle of the frequency.

12. The touch apparatus of claim 10 , wherein a receiving time of the detection signal at least comprises two times of which phases are changed within one cycle of the frequency.

13. The touch apparatus of claim 1 , wherein the detection signal is a signal of which a resonance signal of the driving signal is transmitted to at least one of the plurality of first touch electrodes and the plurality of second touch electrodes.

14. The touch apparatus of claim 1 , wherein a thin film encapsulation layer is disposed on the plurality of pixels, the plurality of touch electrodes are disposed on the thin film encapsulation layer, and the thin film encapsulation has a thickness of 4 μm to 10 μm.

15. A driving method of a touch apparatus, comprising:
receiving a horizontal synchronization signal from a signal controller of a display device;
applying a driving signal to at least one of a plurality of first touch electrodes for sensing a touch input in a first direction and a plurality of second touch electrodes for sensing a touch input in a second direction that crosses the first direction of a touch panel during a first section;
receiving a detection signal from at least one of the plurality of first touch electrodes and the plurality of second touch electrodes during a second section after the first section according to frequency of the driving signal synchronized with at least one of frequency of the horizontal synchronization signal and frequency of a vertical synchronization signal; and
generating touch information by using the detection signal,
wherein the driving signal is synchronized with the horizontal synchronization signal.

16. The driving method of the touch apparatus of claim 15 , wherein the applying of the driving signal comprises simultaneously applying the driving signal to at least one of the plurality of first touch electrodes and at least one of the plurality of second electrodes during the first section, and
the receiving of the detection signal comprises receiving a detection signal from at least one of the plurality of first touch electrodes and at least one of the plurality of second electrodes during the second section.

17. The driving method of the touch apparatus of claim 15 , wherein the driving signal is synchronized with pulses of the horizontal synchronization signal.

18. The driving method of the touch apparatus of claim 15 , wherein the frequency of the driving signal is two or more integer times the frequency of the horizontal synchronization signal.

19. The driving method of the touch apparatus of claim 15 , wherein the detection signal is received in a section determined to correspond to the horizontal synchronization signal.

20. A display device comprising:
a display panel including a display area where a plurality of pixels are located;
a data driver that applies a data signal to data lines connected to the plurality of pixels;
a scan driver that applies a scan signal to scan lines connected to the plurality of pixels;
a signal controller that controls the data driver and the scan driver according to a horizontal synchronization signal;
a touch sensor including an active area that overlaps the display area and where a plurality of first touch electrodes for sensing a touch input in a first direction and a plurality of second touch electrodes for sensing a touch input in a second direction that crosses the first direction are located; and
a touch controller that drives the touch sensor to apply the driving signal to at least one of the plurality of first touch electrodes and at least one of the plurality of second touch electrodes during a first section, and receives a detection signal from at least one of the plurality of first touch electrodes and the plurality of second touch electrodes during a second section after the first section according to frequency of the driving signal synchronized with at least one of frequency of the horizontal synchronization signal and frequency of a vertical synchronization signal,
wherein the driving signal is syn

Assignees

• Hideep Inc

Inventors

• Kim Seyeob
• Kim Bonkee
• Cho Youngho
• Lee Sein

Classifications

• G06F2203/04106

  Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection · CPC title

• G06F3/04184

  Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally · CPC title

• G06F2203/04112

  Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material · CPC title

• G06F3/04186

  Touch location disambiguation · CPC title

• G06F3/044

  by capacitive means · CPC title