Touch display apparatus, driving circuit thereof and driving method therefor, and electronic apparatus

• US 10,133,415 B2
• Filed: 06/23/2014
• Issued: 11/20/2018
• Est. Priority Date: 03/07/2014
• Status: Active Grant

• Current Assignee: FocalTech Systems Co.,Ltd
• Original Assignee: FocalTech Systems Co.,Ltd
• Inventors: Mo, Lianghua, Jiang, Xinxi, Cai, Ningning
• Primary Examiner(s): Pervan, Michael
• Application Number:
  US15/123,959
• Publication Number:
  US 20170017345A1
• Time in Patent Office: 1,611 Days
• Field of Search: 178 1801- 1907, 345173-178
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• CPC Class Codes: G06F 3/04184 Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G09G 2310/065 Waveforms comprising zero voltage phase or pause
• CPC Class Codes: G09G 2340/0435 Change or adaptation of the frame rate of the video stream

Abstract

Provided is a driving circuit for a touch display apparatus. The driving circuit includes: a main control unit, providing image data for image display at a first speed; a driving unit, receiving the image data and sending display data to the touch display apparatus according to the received image data; a data buffering module, disposed in the driving unit, sending the display data at a second speed higher than the first speed, and forming, due to the difference between the second speed and the first speed, a pause time for stopping sending the display data to the touch display apparatus during the process that the main control unit provides the image data; and a touch detection unit, performing touch detection of the touch display apparatus in the pause time.

Claims

1. A driving circuit for a touch display apparatus, wherein the touch display apparatus is configured to perform touch detection and image display, and the touch display apparatus is provided with a plurality of gate lines arranged in a row direction and a plurality of data lines arranged in a column direction, wherein the driving circuit comprises a main control unit, a driving unit and a touch detection unit, and the driving unit is configured to:

drive the gate lines row by row; and

send display data to a column of the data lines after driving each row of the gate lines, to send each row of the display data, wherein

the main control unit is connected to the driving unit and configured to;

send image data section by section to the driving unit at a first speed; and

stop sending the image data to the driving unit for a predetermined time period between time periods for sending sections of the image data;

the driving unit is configured to;

receive the image data sent by the main control unit; and

output the display data corresponding to the received image data section by section to the touch display apparatus at a second speed, wherein the diving unit is configured to stop sending the display data to the touch display apparatus for the predetermined time period between time periods for sending sections of the display data;

the touch detection unit is configured to perform the touch detection of the touch display apparatus in the predetermined time period, wherein

the predetermined time period is at least longer than a time period for sending one row of the display data; and

the first speed is not higher than the second speed.

2. The driving circuit according to claim 1, wherein the predetermined time period is longer than a time period for sending ten rows of the display data.

3. A touch display apparatus, comprising:

a touch display panel, configured to perform touch detection and image display; and

a driving circuit, configured to drive the touch display panel to perform the touch detection and the image display, wherein the driving circuit is the driving circuit according to claim 1.

4. The touch display apparatus according to claim 3, wherein

the touch display panel is a capacitive touch display panel comprising a plurality of touch detection electrodes;

and

the touch detection unit is configured to detect self-capacitance of the touch detection electrodes or detect mutual capacitance between the touch detection electrodes in the predetermined time period.

5. The driving circuit according to claim 1, wherein the driving unit is further configured to form a blank time period before or after each frame of image is displayed;

and

the touch detection unit is further configured to perform the touch detection of the touch display apparatus in the blank time period.

6. A driving method for a touch display apparatus, wherein the touch display apparatus is configured to perform touch detection and image display, and the touch display apparatus is provided with a plurality of gate lines arranged in a row direction and a plurality of data lines arranged in a column direction, wherein the gate lines are driven row by row;

and after each row of the gate lines is driven, send display data to a column of the data lines, to send each row of the display data, wherein the driving method comprises;

sending image data for image display section by section at a first speed, and stopping sending the image data for a predetermined time period between time periods for sending sections of the image data;

receiving the image data sent at the first speed, outputting the display data corresponding to the received image data section by section to the touch display apparatus at a second speed, and stopping sending the display data to the touch display apparatus for the predetermined time period between time periods for sending sections of the display data; and

performing the touch detection of the touch display apparatus in the predetermined time period, wherein

the predetermined time period is at least longer than a time period for sending one row of the display data; and

the first speed is not higher than the second speed.

7. The driving method according to claim 6, wherein the predetermined time period is longer than a time period for sending ten rows of the display data.

8. The driving circuit according to claim 6, further comprising:

forming a blank time period before or after each frame of image is displayed; and

performing the touch detection of the touch display apparatus in the blank time period.

9. The driving method according to claim 6, wherein the touch display apparatus is a capacitive touch display apparatus comprising a plurality of touch detection electrodes;

and

the touch detection unit is configured to detect self-capacitance of the touch detection electrodes or detect mutual capacitance between the touch detection electrodes in the predetermined time period.