Capacitive in-cell touch screen panel having a common electrode layer provided with sensing and driving electrodes

Patent metadata

Field	Value
Publication number	US-9495935-B2
Application number	US-201314347837-A
Country	US
Kind code	B2
Filing date	May 16, 2013
Priority date	Mar 5, 2013
Publication date	Nov 15, 2016
Grant date	Nov 15, 2016

Abstract

The present invention discloses a capacitive touch module, a capacitive in-cell touch screen panel and a display device, in which an integrally connected common electrode layer in an array substrate is split to form touch sensing electrodes and touch driving electrodes which are insulated from each other; and the touch driving electrodes and the touch sensing electrodes are subjected to time-sharing drive to achieve the touch function and the display function. Moreover, each touch sensing electrode includes a plurality of touch sensing sub-electrodes; each touch driving electrode includes a plurality of touch driving sub-electrodes; and opposing sides of adjacent touch sensing sub-electrodes and touch driving sub-electrodes are broken lines. Therefore, the opposing area between the adjacent touch driving electrodes and the adjacent touch sensing electrodes can be increased, and hence the mutual capacitance between the touch driving electrodes and the touch sensing electrodes within the unit area can be increased, and consequently the sensing sensitivity of the touch screen in the touch-control process can be improved.

First claim

The invention claimed is:

1. A capacitive in-cell touch screen panel, comprising an array substrate provided with a common electrode layer, wherein the common electrode layer is provided with touch sensing electrodes and touch driving electrodes which are insulated from each other; each touch sensing electrode includes a plurality of touch sensing sub-electrodes; each touch driving electrode includes a plurality of touch driving sub-electrodes; opposing sides of adjacent touch sensing sub-electrodes and touch driving sub-electrodes are broken lines;
in a display interval, common electrode signals are applied to the touch driving electrodes and the touch sensing electrodes;
in a touch interval, touch scanning signals are applied to the touch driving electrodes, and the touch sensing electrodes are configured to generate by coupling and output voltage signals of the touch scanning signals;
common electrodes are disposed at gaps of the common electrode layer, between the touch sensing electrodes and the touch driving electrodes, and insulated from the touch sensing electrodes and the touch driving electrodes;
opposing sides of adjacent common electrodes and touch driving sub-electrodes are broken lines; and
opposing sides of adjacent common electrodes and touch sensing sub-electrodes are broken lines;
wherein the array substrate of the touch screen is provided with touch signal input lines electrically connected with the touch driving electrodes, sensing signal output lines electrically connected with the touch sensing electrodes, and common electrode signal input lines electrically connected with the common electrodes;
the touch signal input lines, the sensing signal output lines, the common electrode signal input lines correspond to gaps between pixel units in a liquid crystal display (LCD) panel in position; and
the touch driving electrodes are electrically connected with the touch signal input lines through a plurality of through holes; the touch sensing electrodes are electrically connected with the sensing signal output lines through a plurality of through holes; and the common electrodes are electrically connected with the common electrode signal input lines through a plurality of through holes.

2. The touch screen according to claim 1 , wherein the opposing sides of the adjacent touch sensing sub-electrodes and touch driving sub-electrodes, which are broken lines, have staircase structures; and the two staircase structures are consistent in shape and matched with each other.

3. The touch screen according to claim 1 , wherein the opposing sides of the adjacent touch sensing sub-electrodes and touch driving sub-electrodes, which are broken lines, have concave-convex structures; and the two concave-convex structures are consistent in shape and matched with each other.

4. The touch screen according to claim 1 , wherein the array substrate is a color filter substrate or a thin-film transistor (TFT) array substrate in a liquid crystal display (LCD) panel.

5. The touch screen according to claim 1 , wherein the touch sensing electrodes are arranged along a column direction of pixel units in an LCD panel, and the touch driving electrodes are arranged along a row direction of the pixel units in the LCD panel; or
the touch sensing electrodes are arranged along a row direction of pixel units in an LCD panel, and the touch driving electrodes are arranged along a column direction of the pixel units in the LCD panel.

6. The touch screen according to claim 1 , wherein the touch driving electrodes and the touch sensing electrodes have a strip electrode structure or a diamond electrode structure.

Assignees

• Hefei Boe Optoelectronics Tech
• Boe Technology Group Co Ltd

Inventors

• Xu Yubo
• Hu Ming
• Wang Guolei
• Lim Byung Cheon

Classifications

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title

• G02F1/13338

  Input devices, e.g. touch panels · CPC title

• G06F2203/04111

  Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate · CPC title

• G09G2310/0243

  Details of the generation of driving signals · CPC title

• G09G3/3696 Primary

  Generation of voltages supplied to electrode drivers · CPC title