Touch liquid crystal display and method of controlling the same

Patent metadata

Field	Value
Publication number	US-10088718-B2
Application number	US-201715696661-A
Country	US
Kind code	B2
Filing date	Sep 6, 2017
Priority date	Dec 22, 2014
Publication date	Oct 2, 2018
Grant date	Oct 2, 2018

Abstract

A touch control display and a controlling method are provided. The display comprises a TFT array substrate; an opposite substrate; a cover glass disposed on an outside surface of the opposite substrate, wherein the cover glass has an inner surface facing the opposing substrate and an outside surface, and the cover glass, the TFT array substrate, and the opposite substrate collectively define a display area and a non-display area; first electrodes disposed in the display area of the opposite substrate; second electrodes disposed in the non-display area of the cover glass, and on the inner surface of the cover glass; and third electrodes disposed between the opposite substrate and the TFT array substrate. The third electrodes are disposed opposite to the plurality of first electrodes, and at least one of the plurality of third electrodes is multiplexed as a common electrode of the TFT array substrate.

First claim

What is claimed is:

1. A touch control display, comprising:
a thin-film-transition (TFT) array substrate;
an opposite substrate arranged opposite to the TFT array substrate, wherein the opposite substrate has an inner surface facing the TFT array substrate and an outside surface;
a cover glass disposed on the outside surface of the opposite substrate, wherein the cover glass has an inner surface facing the opposing substrate and an outside surface, and the cover glass, the TFT array substrate, and the opposite substrate collectively define a display area and a non-display area;
a plurality of first electrodes disposed in the display area of the opposite substrate;
a plurality of second electrodes disposed in the non-display area of the cover glass, and disposed on the inner surface of the cover glass; and
a plurality of third electrodes disposed between the opposite substrate and the TFT array substrate, wherein the plurality of third electrodes are disposed opposite to the plurality of first electrodes, and at least one of the plurality of third electrodes is multiplexed as a common electrode of the TFT array substrate,
wherein the plurality of first electrodes are touch driving electrodes, and the plurality of second electrodes and the plurality of third electrodes are touch sensing electrodes,
a coordinate of a touch in the display area is obtained based on a change of coupling capacitance between the plurality of first electrodes and the plurality of third electrodes, and
a coordinate of a touch in the non-display area is obtained based on a change of coupling capacitance between the plurality of first electrodes and the plurality of second electrodes.

2. The touch control display according to claim 1 , wherein:
the plurality of first electrodes extend along a first direction and are spaced apart from one another;
the plurality of third electrodes extend along a second direction and are spaced apart from one another; and
the first direction intersects the second direction.

3. The touch control display according to claim 2 , wherein the first direction is substantially perpendicular to the second direction.

4. The touch control display according to claim 1 , wherein the plurality of first electrodes are disposed on the outside surface of the opposing substrate.

5. The touch control display according to claim 1 , the opposite substrate is a color filter substrate.

6. The touch control display according to claim 1 , wherein the TFT array substrate has an inner surface facing the opposing substrate and an outside surface, and the plurality of third electrodes are disposed on the inner surface of the TFT array substrate.

7. The touch control display according to claim 1 , wherein the plurality of third electrodes are disposed on the inner surface of the opposing substrate.

8. The touch control display according to claim 1 , further comprising:
a first flexible printed circuit board electrically connected to the plurality of first electrodes;
a second flexible printed circuit board electrically connected to the plurality of second electrodes; and
a third flexible printed circuit board electrically connected to the plurality of third electrodes,
wherein the flexible printed circuit board, the second flexible printed circuit board, and the third flexible printed circuit board are further electrically connected to a touch driving integrated circuit (IC).

9. The touch control display according to claim 8 , further comprising:
a plurality of wire terminals located in the non-display area,
wherein each of the plurality of first electrodes is electrically connected to the first flexible printed circuit board by a wire terminal,
each of the plurality of second electrodes is electrically connected to the second flexible printed circuit board by a wire terminal, and
each of the plurality of third electrodes is electrically connected to the third flexible printed circuit board by a wire terminal.

10. The touch control display according to claim 9 , wherein:
the first flexible printed circuit board and the third flexible printed circuit board are the same flexible printed circuit board, and
the second flexible printed circuit is an individual flexible printed circuit different from the first flexible printed circuit board and the third flexible printed circuit board.

11. The touch control display according to claim 9 , wherein:
the first flexible printed circuit board, the second flexible printed circuit board, and the third flexible printed circuit board each is an individual flexible printed circuit.

12. The touch control display according to claim 1 , wherein a second electrode has at least one of a striped-shape and a sheet shape, and the second electrodes are spaced apart from one another on at least one side of the display area of the cover glass.

13. The touch control display according to claim 12 , wherein each of the plurality of second electrodes has the sheet shape, and the second electrodes are spaced apart from one another at periphery of the display area of the cover glass.

14. The touch control display according to claim 1 , further comprising:
a plurality of fourth electrodes disposed in the non-display area of the cover glass,
wherein the plurality of fourth electrodes are disposed on the inner surface of the cover glass, and disposed on the same surface as the plurality of second electrodes,
the plurality of fourth electrodes are touch sensing electrodes.

15. The touch control display according to claim 14 , further comprising:
a first flexible printed circuit board, a second flexible printed circuit board, and a third flexible printed circuit board electrically connected to a touch driving integrated circuit (IC); and
a plurality of wire terminals located in the non-display area,
wherein each of the plurality of first electrodes is electrically connected to the first flexible printed circuit board by a wire terminal,
each of the plurality of second electrodes is electrically connected to the second flexible printed circuit board by a wire terminal,
each of the plurality of third electrodes is electrically connected to the third flexible printed circuit board by a wire terminal, and
each of the plurality of fourth electrodes is electrically connected to the second flexible printed circuit board by a wire terminal.

16. The touch control display according to claim 14 , wherein:
a fourth electrode has at least one of a striped-shape and a sheet shape, and the fourth electrode is spaced apart from one another on at least one side of the display area.

17. A touch control display, comprising:
a thin-film-transition (TFT) array substrate;
an opposite substrate arranged opposite to the TFT array substrate, wherein the opposite substrate has an inner surface facing the TFT array substrate and an outside surface;
a cover glass disposed on the outside surface of the opposite substrate, wherein the cover glass has an inner surface facing the opposing substrate and an outside surface, and the cover glass, the TFT array substrate, and the opposite substrate collectively define a display area and a non-display area;
a plurality of first electrodes disposed in the display area of the opposite substrate;
a plurality of second electrodes disposed in the non-display area of the cover glass, and disposed on the inner surface of the cover glass; and
a plurality of third electrodes disposed between the opposite substrate and the TFT array substrate, wherein the plurality of third electrodes are disposed opposite to the plurality of first e

Assignees

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

Inventors

• Li Gujun
• Zhang Xianxiang
• Xu Yingying
• Li Xiaoye
• Liu Gang
• Zhou Xingyao
• Yang Kang
• Cao Zhaokeng
• Zhu Juan

Classifications

• G02F1/134336 Primary

  Matrix · CPC title

• G02F1/1362

  Active matrix addressed cells {(G02F1/134336, G02F1/134363 take precedence)} · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title

• G02F1/13458

  Terminal pads · CPC title

• G02F1/133514

  Colour filters · CPC title