Drive Circuit and Drive Method of Touch Display Panel, and Touch Display Apparatus

Patent metadata

Field	Value
Publication number	US-2021191547-A1
Application number	US-202016899600-A
Country	US
Kind code	A1
Filing date	Jun 12, 2020
Priority date	Dec 19, 2019
Publication date	Jun 24, 2021
Grant date	—

Abstract

A drive circuit and a drive method of a touch display panel, and a touch display apparatus are provided. The drive circuit includes a system unit and a timing controller. The system unit is configured to send a touch enabled signal to the timing controller when a touch function is enabled. The timing controller is configured to receive the touch enabled signal from the system unit, and insert a test pattern between display image frames in every preset time interval, wherein touch panel noise generated by the test pattern is lower than a preset noise threshold.

First claim

What we claim is:

1 . A drive circuit of a touch display panel, comprising a system unit and a timing controller, wherein:
the system unit is configured to send a touch enabled signal to the timing controller when a touch function is enabled; the timing controller is configured to receive the touch enabled signal from the system unit, insert a test pattern between display image frames in every preset time interval, wherein touch panel noise generated by the test pattern is lower than a preset noise threshold.

2 . The drive circuit of the touch display panel according to claim 1 , further comprising a control unit and a touch drive unit, wherein
the system unit is further configured to send the touch enabled signal to the control unit when the touch function is enabled; the control unit is configured to receive the touch enabled signal from the system unit, generate a touch synchronization signal according to the touch enabled signal, and output the touch synchronization signal to the touch drive unit; the touch drive unit is configured to scan touch rows of the touch display panel according to the touch synchronization signal in display of an image frame.

3 . The drive circuit of the touch display panel according to claim 2 , wherein the control unit is a microcontroller unit, and the touch drive unit is a touch IC.

4 . The drive circuit of the touch display panel according to claim 2 , further comprising: a gate drive unit, wherein
the timing controller is further configured to output gate drive signals to the gate drive unit; the gate drive unit is configured to generate gate control signals according to the gate drive signals and output the gate control signals to gate lines of the touch display panel to progressively scan the gate lines.

5 . The drive circuit of the touch display panel according to claim 4 , wherein the gate drive unit is a Gate IC or a Gate Driver on Array (GOA) circuit.

6 . The drive circuit of the touch display panel according to claim 4 , wherein the system unit is further configured to divide a time period in which the touch display panel displays each image frame into N control periods, wherein each control period comprises a display period and a touch period that are sequentially set, and N is an integer greater than or equal to 1;
in the time period when the touch display panel displays each image frame, the gate drive unit scans a plurality of gate lines of the touch display panel in sequence in N display periods, and the touch drive unit scans a plurality of touch rows of the touch display panel in sequence in each touch period.

7 . The drive circuit of the touch display panel according to claim 6 , wherein the system unit is further configured to send a first notification to the timing controller at beginning of each of the N display periods, to notify the timing controller of start of each of the N display periods, and send a second notification to the timing controller and the control unit at beginning of a touch period, to notify the timing controller and the control unit of start of the touch period.

8 . The drive circuit of the touch display panel according to claim 6 , wherein the system unit is further configured to send a first notification to the timing controller to notify the timing controller of start of a display period when a display function is turned on, and send a second notification to the timing controller and the control unit to notify the timing controller and the control unit of start of a touch period when the touch function is turned on.

9 . The drive circuit of the touch display panel according to claim 1 , wherein inserting, by the timing controller, a test pattern between display image frames in every preset time interval, comprises: inserting one said test pattern every other display image frame or more display image frames; or, inserting one said test pattern in one or more touch periods in display of an image frame in every preset time interval.

10 . A touch display apparatus comprising a touch display panel and a drive circuit of the touch display panel, wherein the drive circuit of the touch display panel comprises a system unit and a timing controller, wherein,
the system unit is configured to send a touch enabled signal to the timing controller when a touch function is enabled; the timing controller is configured to receive the touch enabled signal from the system unit, insert a test pattern between display image frames in every preset time interval, wherein touch panel noise generated by the test pattern is lower than a preset noise threshold.

11 . The touch display apparatus according to claim 10 , wherein the drive circuit of the touch display panel further comprises a control unit and a touch drive unit;
the system unit is further configured to send the touch enabled signal to the control unit when the touch function is enabled; the control unit is configured to receive the touch enabled signal from the system unit, generate a touch synchronization signal according to the touch enabled signal, and output the touch synchronization signal to the touch drive unit; the touch drive unit is configured to scan touch rows of the touch display panel according to the touch synchronization signal in display of an image frame.

12 . The touch display apparatus according to claim 11 , wherein the control unit is a microcontroller unit and the touch drive unit is a touch IC.

13 . The touch display apparatus according to claim 11 , wherein the drive circuit of the touch display panel further comprises a gate drive unit;
the timing controller is further configured to output gate drive signals to the gate drive unit; the gate drive unit is configured to generate gate control signals according to the gate drive signals and output the gate control signals to gate lines of the touch display panel to progressively scan the gate lines.

14 . The touch display apparatus according to claim 13 , wherein the system unit is further configured to divide a time period in which the touch display panel displays each image frame into N control periods, wherein each control period comprises a display period and a touch period that are sequentially set, and N is an integer greater than or equal to 1;
in the time period when the touch display panel displays each image frame, the gate drive unit scans a plurality of gate lines of the touch display panel in sequence in N display periods, and the touch drive unit scans a plurality of touch rows of the touch display panel in sequence in each touch period.

15 . The touch display apparatus according to claim 14 , wherein the system unit is further configured to send a first notification to the timing controller at beginning of each of the N display periods to notify the timing controller of start of each of the N display periods, and send a second notification to the timing controller and the control unit at beginning of a touch period to notify the timing controller and the control unit of start of the touch period.

16 . The touch display apparatus according to claim 14 , wherein the system unit is further configured to send a first notification to the timing controller to notify the timing controller of start of a display period when a display function is turned on, and send a second notification to the timing controller and the control unit to notify the timing controller and the control unit of start of a touch period when a touch function is turned on.

17 . The touch display apparatus according to claim 10 , wherein the touch display panel is a Single

Assignees

• Chongqing Boe Optoelectronics Tech Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Hsu Yihjen
• Qin Peng
• Wu Zhongshan
• Guo Jiandong

Classifications

• G06F3/04184

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

• G06F3/04182 Primary

  Filtering of noise external to the device and not generated by digitiser components · CPC title

• G06F3/0418

  for error correction or compensation, e.g. based on parallax, calibration or alignment · CPC title

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · CPC title

• G06F3/038

  Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry · CPC title