Touch display panel, method for driving the same, and display device

Patent metadata

Field	Value
Publication number	US-10976851-B2
Application number	US-201916654124-A
Country	US
Kind code	B2
Filing date	Oct 16, 2019
Priority date	Jan 4, 2019
Publication date	Apr 13, 2021
Grant date	Apr 13, 2021

Abstract

A touch display panel, a method for driving the same, and a display device. The touch display panel includes: an array substrate including pixel zones in an array, control signal lines at gaps between rows of pixel zones, and acquisition signal lines at gaps between columns of pixel zones, and insulated from control signal lines, sub-pixels, line recognition control transistors, and line recognition electrodes at gaps between the sub-pixels are arranged in pixel zones; line recognition control transistors have gates connected the control signal line, sources connected with line recognition electrodes, and drains connected with acquisition signal line; control signal lines provide line recognition control transistors with a control signal; and the acquisition signal lines provide the line recognition electrodes with a line recognition signal through the line recognition control transistors, and receive a signal carrying line information transmitted by the line recognition electrodes through the line recognition control transistors.

First claim

The invention claimed is:

1. A touch display panel, comprising: an array substrate comprising a plurality of pixel zones arranged in an array, a plurality of control signal lines arranged at gaps between rows of pixel zones, and a plurality of acquisition signal lines arranged at gaps between columns of pixel zones, and insulated from the control signal lines, wherein:
a plurality of sub-pixels, line recognition control transistors, and line recognition electrodes arranged at gaps between the sub-pixels are arranged in the pixel zones, an overlap area between orthographic projections of the line recognition electrodes on the array substrate and orthographic projections of the plurality of sub-pixels on the array substrate is zero, and the line recognition control transistors have gates connected with the control signal line, sources connected with the line recognition electrodes, and drains connected with the acquisition signal line;
the control signal lines are configured to provide the line recognition control transistors with a control signal; and
the acquisition signal lines are configured to provide the line recognition electrodes with a line recognition signal through the line recognition control transistors, and to receive a signal carrying line information transmitted by the line recognition electrodes through the line recognition control transistors.

2. The touch display panel according to claim 1 , wherein the line recognition electrodes comprise first sub-electrodes arranged at the gaps between the rows of sub-pixels, and second sub-electrodes arranged at gaps between the columns of sub-pixels, and electrically connected with the first sub-electrode, wherein:
one first sub-electrode is arranged at a row gap between two adjacent pixel zones, and one second sub-electrode is arranged at a column gap between two adjacent pixel zones.

3. The touch display panel according to claim 2 , wherein a length of the first sub-electrode in the pixel zones is less than a sum of lengths of the sub-pixels in a row direction, and a length of the second sub-electrode is identical to a length of the sub-pixels in a column direction.

4. The touch display panel according to claim 1 , further comprises scan signal lines arranged at gaps between the rows of pixel zones; and
the scan signal lines are reused as the control signal lines.

5. The touch display panel according to claim 1 , further comprises data signal lines arranged at gaps between the columns of sub-pixels; and
the data signal lines are arranged at a layer same as a layer at which the acquisition signal lines are arranged, and the data signal lines and the acquisition signal lines in a same pixel zone are arranged at different gaps between columns of sub-pixels.

6. The touch display panel according to claim 1 , further comprises black matrixes; and
orthographic projections of the black matrixes onto the array substrate cover orthographic projections of the line recognition electrodes, the control signal lines, the acquisition signal lines, and the line recognition control transistors onto the array substrate.

7. A display device, comprising the touch display panel according to claim 1 .

8. The display device according to claim 7 , wherein the line recognition electrodes comprise first sub-electrodes arranged at the gaps between the rows of sub-pixels, and second sub-electrodes arranged at gaps between the columns of sub-pixels, and electrically connected with the first sub-electrode, wherein:
one first sub-electrode is arranged at a row gap between two adjacent pixel zones, and one second sub-electrode is arranged at a column gap between two adjacent pixel zones.

9. The display device according to claim 8 , wherein a length of the first sub-electrode in the pixel zones is less than a sum of lengths of the sub-pixels in a row direction, and a length of the second sub-electrode is identical to a length of the sub-pixels in a column direction.

10. The display device according to claim 7 , wherein the touch display panel further comprises scan signal lines arranged at gaps between the rows of pixel zones; and
the scan signal lines are reused as the control signal lines.

11. The display device according to claim 7 , wherein the touch display panel further comprises data signal lines arranged at gaps between the columns of sub-pixels; and
the data signal lines are arranged at a layer same as a layer at which the acquisition signal lines are arranged, and the data signal lines and the acquisition signal lines in a same pixel zone are arranged at different gaps between columns of sub-pixels.

12. The display device according to claim 7 , wherein the touch display panel further comprises black matrixes; and
orthographic projections of the black matrixes onto the array substrate cover orthographic projections of the line recognition electrodes, the control signal lines, the acquisition signal lines, and the line recognition control transistors onto the array substrate.

13. A method for driving a touch display panel, wherein the touch display panel comprises: an array substrate comprising a plurality of pixel zones arranged in an array, a plurality of control signal lines arranged at gaps between rows of pixel zones, and a plurality of acquisition signal lines arranged at gaps between columns of pixel zones, and insulated from the control signal lines, and wherein:
a plurality of sub-pixels, line recognition control transistors, and line recognition electrodes arranged at gaps between the sub-pixels are arranged in the pixel zones, an overlap area between orthographic projections of the line recognition electrodes on the array substrate and orthographic projections of the plurality of sub-pixels on the array substrate is zero, and the line recognition control transistors have gates connected with the control signal line, sources connected with the line recognition electrodes, and drains connected with the acquisition signal line;
the control signal lines are configured to provide the line recognition control transistors with a control signal; and
the acquisition signal lines are configured to provide the line recognition electrodes with a line recognition signal through the line recognition control transistors, and to receive a signal carrying line information transmitted by the line recognition electrodes through the line recognition control transistors;
the method comprising:
applying a control signal to the control signal lines line by line;
applying a line recognition signal to the line recognition electrodes through the acquisition signal lines; and
detecting a feedback signal of the line recognition electrodes acquired through the acquisition signal lines to recognize a line.

14. The driving method according to claim 13 , wherein the applying the line recognition signal to the line recognition electrodes through the acquisition signal lines comprises:
after the control signal is applied to one control signal line, applying the line recognition signal to the control signal line through the acquisition signal lines of a column matching with the control signal line.

15. The driving method according to claim 13 , wherein the detecting the feedback signal of the line recognition electrodes acquired through the acquisition signal lines to recognize a line comprises:
detecting the feedback signal of the line recognition electrodes acquired through the acquisition signal lines, and determining a touch position;
determining acquisition signal lines to be detected again, according to the touch position;
applying a line recognition signal again to determined acq

Assignees

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

Inventors

• Wu Junhui
• Bi Xin
• Guo Jiandong
• Pu Xun
• Wu Zhongshan

Classifications

• G06V40/13

  Sensors therefor · CPC title

• G06V10/17

  using hand-held instruments · CPC title

• G06V10/147

  Details of sensors, e.g. sensor lenses (fingerprint or palmprint sensors G06V40/13; vascular sensors G06V40/145; eye sensors G06V40/19) · CPC title

• G06V40/12

  Fingerprints or palmprints · CPC title

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · CPC title