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

Patent metadata

Field	Value
Publication number	US-10001876-B2
Application number	US-201715676671-A
Country	US
Kind code	B2
Filing date	Aug 14, 2017
Priority date	Apr 1, 2015
Publication date	Jun 19, 2018
Grant date	Jun 19, 2018

Abstract

An OLED touch display panel is provided, including: a display substrate; a touch electrode including multiple touch electrode units arranged on the display substrate; multiple touch switch elements having a one-to-one correspondence with and electrically connected to the touch electrode units respectively; multiple first signal lines each electrically connected to at least two touch switch elements located in different columns; multiple second signal lines each electrically connected to at least two touch switch elements located in different rows; a display pixel arranged on the touch electrode, where the display pixel includes multiple pixel unit groups each corresponding to one touch electrode unit; and a glass cover arranged on the display pixel, where each touch electrode unit has multiple meshes opposite to pixel units in one pixel unit group corresponding to the each touch electrode unit in a vertical direction, respectively.

First claim

What is claimed is:

1. An organic light emitting diode (OLED) touch display panel, comprising:
a display substrate;
a touch electrode arranged on the display substrate, wherein the touch electrode comprises a plurality of touch electrode units arranged in rows and columns;
a plurality of touch switch elements, wherein the plurality of touch switch elements each is electrically connected in a one-to-one relationship to one of the plurality of touch electrode units;
a plurality of first signal lines each electrically connecting to at least two touch switch elements of the plurality of touch switch elements, wherein the at least two touch switch elements are located in different columns, wherein the plurality of first signal lines are configured to turn on or turn off the plurality of touch switch elements electrically connecting to said first signal lines, and wherein the at least two touch switch elements electrically connected with a first signal line of the plurality of first signal lines are not located in a same row;
a plurality of second signal lines each electrically connecting to at least two touch switch elements of the plurality of touch switch elements, wherein the at least two touch switch elements connected to the second signal line are located in different rows, and wherein the plurality of second signal lines each is configured to provide a driving signal to one of the plurality of touch electrode units electrically connecting to said turned-on touch switch element;
a display pixel grid arranged on the touch electrode, wherein the display pixel grid comprises a plurality of pixel unit groups each associated with one of the plurality of touch electrode units; and
a glass cover arranged on the display pixel grid;
wherein the plurality of touch electrode units each has a plurality of meshes, and wherein the plurality of meshes opposite to a pixel unit in one pixel unit group associated with said touch electrode unit in a vertical direction, respectively.

2. The OLED touch display panel according to claim 1 , wherein the plurality of touch switch elements are thin-film transistors each comprising a first electrode, a second electrode and a gate electrode.

3. The OLED touch display panel according to claim 2 , wherein the plurality of touch electrode units is arranged in N rows and M columns, and wherein the plurality of first signal lines each is electrically connected to gate electrodes of the thin-film transistors in M columns.

4. The OLED touch display panel according to claim 3 , wherein the plurality of second signal lines each is electrically connected to the second electrodes of the thin-film transistors in N rows.

5. The OLED touch display panel according to claim 4 , wherein the plurality of second signal lines each is electrically connected to the second electrodes of thin-film transistors in N rows of the same column.

6. The OLED touch display panel according to claim 2 , wherein the plurality of touch electrode units each is electrically connected to the first electrode or the second electrode of the thin-film transistor.

7. The OLED touch display panel according to claim 2 , further comprising:
a plurality of display switch elements, wherein the plurality of display switch elements each is electrically connected an associated one of the plurality of pixel units respectively, wherein the display switch elements are thin-film transistors comprising a first electrode, a second electrode and a gate electrode, and
wherein the gate electrodes, the first electrodes and the second electrodes of the plurality of touch switch elements are formed on same layers as the gate electrodes, the first electrodes and the second electrodes of the display switch elements, respectively.

8. The OLED touch display panel according to claim 7 , wherein each of the gate electrodes of the plurality of touch switch elements is formed on a same layer as the associated touch electrode unit.

9. The OLED touch display panel according to claim 1 , wherein the at least two touch switch elements electrically connected with a second signal line of the plurality of second signal lines are not located in a same column.

10. An organic light emitting diode (OLED) touch display panel, comprising:
a display substrate;
a display pixel grid arranged on the display substrate, wherein the display pixel grid comprises a plurality of pixel unit groups;
a glass cover arranged on the display pixel grid;
a touch electrode arranged on the glass cover, wherein the touch electrode comprises a plurality of touch electrode units arranged in rows and columns, wherein each touch electrode unit corresponds to one pixel unit group;
a plurality of touch switch elements, wherein the plurality of touch switch elements each is electrically connected in a one-to-one relationship to one of the plurality of touch electrode units;
a plurality of first signal lines, each electrically connecting to at least two touch switch elements of the plurality of touch switch elements, wherein the at least two touch switch elements are located in different columns, wherein the plurality of first signal lines are configured to turn on or turn off the touch switch elements electrically connecting to said first signal lines, and wherein the at least two touch switch elements electrically connected with a first signal line of the plurality of first signal lines are not located in a same row; and
a plurality of second signal lines, wherein each second signal line is electrically connected to at least two touch switch elements of the plurality of touch switch elements, wherein the at least two touch switch elements connected to the second signal line are located in different rows, and wherein the plurality of second signal lines each is configured to provide a driving signal to said touch electrode unit electrically connecting to the turned-on touch switch element,
wherein each of the plurality of touch electrode units is a planar electrode.

11. The OLED touch display panel according to claim 10 , wherein the touch switch elements are thin-film transistors each comprising a first electrode, a second electrode and a gate electrode.

12. The OLED touch display panel according to claim 11 , wherein the plurality of touch electrode units are arranged in N rows and M columns; and
wherein the plurality of first signal lines each is electrically connected to the gate electrodes of thin-film transistors in M columns.

13. The OLED touch display panel according to claim 12 , wherein the plurality of second signal lines each is electrically connected to the second electrodes of thin-film transistors in N rows.

14. The OLED touch display panel according to claim 13 , wherein the plurality of second signal lines each is electrically connected to the second electrodes of thin-film transistors in N rows of the same column.

15. The OLED touch display panel according to claim 11 , wherein the plurality of touch electrode units each is electrically connected to the first electrode or the second electrode of the thin-film transistor.

16. The OLED touch display panel according to claim 10 , wherein the at least two touch switch elements electrically connected with a second signal line of the plurality of second signal lines are not located in a same column.

Assignees

• Shanghai Tianma Micro Elect Co
• Tianma Micro Electronics Co Ltd

Inventors

• Li Gujun
• Li Yue
• Li Xiaoye
• Xiang Dongxu

Classifications

• H10W90/00

  Package configurations · 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

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/044

  by capacitive means · CPC title

• H01L27/1255

  Electricity · mapped topic