Touch panel and liquid crystal display device

Patent metadata

Field	Value
Publication number	US-2016328073-A1
Application number	US-201514849547-A
Country	US
Kind code	A1
Filing date	Sep 9, 2015
Priority date	May 8, 2015
Publication date	Nov 10, 2016
Grant date	—

Abstract

A touch panel and a liquid crystal display device. The touch panel includes a plurality of touch electrodes and a plurality of conductive grids, with each of the plurality of touch electrodes being located inside one of the plurality of conductive grids; a plurality of touch electrodes are divided into at least two groups of touch electrodes, at least two conductive network units insulated from each other are formed by a plurality of conductive grids, and each conductive network unit corresponds to at least one group of touch electrodes.

First claim

We claim:

1 . A touch panel, comprising:
a plurality of touch electrodes; and a plurality of conductive grids, with each of the plurality of touch electrodes being located inside one of the plurality of conductive grids; wherein the plurality of touch electrodes are divided into at least two groups of touch electrodes, the plurality of conductive grids form at least two conductive network units insulated from each other, and each conductive network unit corresponds to at least one group of the touch electrodes.

2 . The touch panel of claim 1 , wherein the plurality of touch electrodes are arranged in a matrix and each group of the touch electrodes comprises a row or column of the touch electrodes.

3 . The touch panel of claim 1 , wherein conductive grids forming a conductive network unit are each enclosed and one or more groups of the touch electrodes are enveloped by the conductive network unit.

4 . The touch panel of claim 3 , wherein a constant voltage is applied to the conductive network unit.

5 . The touch panel of claim 3 , wherein if one group of the touch electrodes are enveloped by the conductive network unit, a pulse signal identical to a touch detection pulse signal applied to the one group of the touch electrodes is applied to the conductive network unit.

6 . The touch panel of claim 1 , wherein each conductive grid in which one touch electrode is located forms the conductive network unit, to which a constant voltage or a pulse signal identical to a touch detection pulse signal applied to the corresponding group of the touch electrodes is applied.

7 . The touch panel of claim 1 , wherein a conductive network unit comprises a plurality of conductive sub-grids each with side openings, and each group of the touch electrodes are enveloped by two conductive network units, where the side openings of one of the two conductive network units face those of the other of the conductive network units, so that each touch electrode is placed in a conductive grid formed by the two conductive sub-grids with their side openings facing each other.

8 . The touch panel of claim 7 , wherein two adjacent conductive sub-grids with their side openings being opposite are configured to share a common side.

9 . The touch panel of claim 7 , wherein a constant voltage is applied to the conductive network unit.

10 . The touch panel of claim 1 , further comprising a plurality of touch signal lines, which are electrically connected with the plurality of touch electrodes, respectively.

11 . The touch panel of claim 10 , wherein the plurality of touch electrodes are divided from a common electrode for displaying.

12 . The touch panel of claim 11 , wherein the plurality of touch signal lines are operable as display signal lines for the common electrode.

13 . A liquid crystal display device, comprising a color filter substrate and a touch panel, wherein the touch panel comprises:
a plurality of touch electrodes; and a plurality of conductive grids, with each of the plurality of touch electrodes being located inside one of the plurality of conductive grids; wherein the plurality of touch electrodes are divided into at least two groups of touch electrodes, the plurality of conductive grids form at least two conductive network units insulated from each other, and each conductive network unit corresponds to at least one group of the touch electrodes.

14 . The liquid crystal display device of claim 13 , wherein integrated circuits of the liquid crystal display device are arranged in a non-display region of the touch panel, and touch signal lines and conductive network units are electrically to the integrated circuits.

Assignees

• Xiamen Tianma Micro Electronics Co Ltd
• Tianma Microelectronics Co Ltd

Inventors

• Lai Qingjun
• Li Jing

Classifications

• G06F2203/04107

  Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• G06F3/0416 Primary

  Control or interface arrangements specially adapted for digitisers · CPC title

• G09G3/36

  using liquid crystals · CPC title