NON IN-CELL TOUCH DISPLAY APPARATUS AND TOUCH DETECTION METHOD THEREOF

• US 20190073069A1
• Filed: 11/30/2017
• Published: 03/07/2019
• Est. Priority Date: 09/05/2017
• Status: Abandoned Application

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Yeh, Szu-Che, Chen, Chi-Cheng, Liu, Gui-Wen, Hsu, Feng-Ming
• Application Number:
  US15/826,730
• Publication Number:
  US 20190073069A1
• Time in Patent Office: Days
• CPC Class Codes: G06F 2203/04104 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 Class Codes: G06F 2203/04106 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 Class Codes: G06F 2203/04108 Touchless 2D- digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface without distance measurement in the Z direction
• CPC Class Codes: G06F 3/03545 Pens or stylus
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04184 Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally

Abstract

A non in-cell touch display apparatus and a touch detection method thereof are provided. The touch detection method includes: dividing a vertical scanning time period into at least one physical scanning time period and at least one virtual scanning time period; driving at least one physical gate line according to a first clock signal during each of the at least one physical scanning time period, and driving at least one virtual gate line according to a second clock signal during each of the at least one virtual scanning time period; operating a first type touch detection during the at least one physical scanning time period, and operating a second type touch detection during the at least one virtual scanning time period.

Claims

1. A touch detection method adapted to a touch display panel, the touch detection method comprising:

dividing a vertical scanning time period into at least one physical scanning time period and at least one virtual scanning time period;

driving at least one physical gate line according to a first clock signal during the at least one physical scanning time period, and driving at least one virtual gate line according to a second clock signal during at least the one virtual scanning time period

operating a first type touch detection during the at least one physical scanning time period, and also operating a second type touch detection during at least one virtual scanning time period.

2. The touch detection method as claimed in claim 1, wherein the at least one physical scanning time period and the at least one virtual scanning time period are alternately arranged in the vertical scanning time period.

3. The touch detection method as claimed in claim 1, wherein a frequency of the first clock signal is higher than a frequency of the second clock signal.

4. The touch detection method as claimed in claim 1, wherein the step of driving the at least one virtual gate line according to the second clock signal during the at least one virtual scanning time period comprises:

setting a frequency of the second clock signal and the number of cycles of the second clock signal during the at least one virtual scanning time period, so as to set a length of time of the at least one virtual scanning time period.

5. The touch detection method as claimed in claim 1, wherein the step of driving the at least one virtual gate line according to the second clock signal during the at least one virtual scanning time period comprises:

stopping providing at least one physical display pixel with at least one display data during the at least one virtual scanning time period or updating a black data.

6. The touch detection method as claimed in claim 1, wherein the step of driving the at least one physical gate line according to the first clock signal during the at least one physical scanning time period comprises:

corresponding to a driven sequence of the at least one physical gate line, providing at least one display data to at least one display pixel.

7. The touch detection method as claimed in claim 1, wherein the first type touch detection is a finger touch detection, while the second type touch detection is a stylus touch detection.

8. A touch display apparatus, comprising:

a touch display panel;

a gate signal generator, coupled to the touch display panel via a plurality of gate lines and driving the plurality of gate lines according to a control signal; and

a controller, coupled to the gate signal generator, wherein the controller is configured to;

divide a vertical scanning time period into at least one physical scanning time period and at least one virtual scanning time period;

drive at least one physical gate line according to a first clock signal during the at least one physical scanning time period, and drive at least one virtual gate line according to a second clock signal during the at least one virtual scanning time period; and

operate a first type touch detection during the at least one physical scanning time period, and also operate a second type touch detection during the at least one virtual scanning time period.

9. The touch display apparatus as claimed in claim 8, wherein the at least one physical scanning time period and the at least one virtual scanning time period are alternately arranged in the vertical scanning time period.

10. The touch display apparatus as claimed in claim 8, wherein a frequency of the first clock signal is higher than a frequency of the second clock signal.

11. The touch display apparatus as claimed in claim 8, wherein by setting a frequency of the second clock signal and a number of cycles of the second clock signal during the at least one virtual scanning time period, the controller sets a length of time of the at least one virtual scanning time period.

12. The touch display apparatus as claimed in claim 8, further comprising:

a source driver, coupled to the controller,

wherein the controller enables the source driver to correspond to a driven sequence of the at least one physical gate line and provides at least one corresponding display pixel with at least one display data during the at least one physical scanning time period.

13. The touch display apparatus as claimed in claim 12, further comprising:

a multiplexer, coupled between the source driver and the touch display panel,

wherein the source driver stops providing the at least one display data to the at least one physical display pixel or updating a black screen during the at least one virtual scanning time period, and the multiplexer stops operating during the at least one virtual scanning time period.

14. The touch display apparatus as claimed in claim 8, wherein the first type touch detection is a finger touch detection, while the second type touch detection is a stylus touch detection.