Embedded touch-screen display panel structure

Patent metadata

Field	Value
Publication number	US-2016283003-A1
Application number	US-201514849800-A
Country	US
Kind code	A1
Filing date	Sep 10, 2015
Priority date	Mar 26, 2015
Publication date	Sep 29, 2016
Grant date	—

Abstract

An embedded touch-screen display panel structure for an electronic device includes a common electrode layer and a pixel electrode layer. The common electrode layer includes a number of sensing electrodes and a plurality of drive lines. Each of the sensing electrodes operating in a display mode receives a common voltage to cooperatively induce an electric field with corresponding pixel electrodes of the pixel electrode layer to drive corresponding liquid crystals of a liquid crystal display to rotate to carry out display functions of the display panel structure. Each of the sensing electrodes operating in a touch-sensing mode cooperatively carries out touch-sensing functions of the display panel structure with corresponding drive lines. The sensing electrodes and the drive lines are arranged in a same plane of the common electrode layer.

First claim

What is claimed is:

1 . An embedded touch-screen display panel structure for an electronic device, the embedded touch-screen display panel structure comprising:
a first substrate; a second substrate spaced from the first substrate; a liquid crystal layer located between the first substrate and the second substrate; a color filter layer located between the first substrate and the liquid crystal layer; a common electrode layer comprising a plurality of sensing electrodes and a plurality of drive lines, the common electrode layer located between the second substrate and the liquid crystal layer; a display driver layer comprising a plurality of thin film transistors and located between the second substrate and the common electrode layer; a pixel electrode layer comprising a plurality of pixel electrodes and located between the common electrode layer and the liquid crystal layer; a first insulating layer located between the display driver layer and the common electrode layer; and a second insulating layer located between the common electrode layer and the pixel electrode layer; wherein each of the plurality of sensing electrodes of the common electrode layer is operable in a display mode and a touch-sensing mode; wherein each of the plurality of sensing electrodes operating in the display mode receives a common voltage for carrying out a display function of the display panel structure; wherein each of the plurality of sensing electrodes operating in the touch-sensing mode carries out a touch-sensing function of the display panel structure; and wherein the plurality of sensing electrodes and the plurality of drive lines are arranged in a same plane of the common electrode layer.

2 . The embedded touch-screen display panel structure as in claim 1 , wherein each sensing electrode corresponds to a predetermined number of pixel display areas; each sensing electrode operating in the display mode carries out display functions of the corresponding pixel display areas; and each sensing electrode operating in the touch-sensing mode carries out touch-sensing functions of the corresponding pixel display areas.

3 . The embedded touch-screen display panel structure as in claim 2 , wherein:
each pixel display area comprises one pixel electrode and one thin film transistor, the pixel electrode being electrically coupled to the thin film transistor; the thin film transistors receive scan signals transmitted along a plurality of scan lines from a scan driving circuit; the pixel electrodes receive data signals transmitted along a plurality of data lines from a data driving circuit; and each of the plurality of scan lines is arranged along a first direction, and each of the plurality of data lines is arranged along a second direction.

4 . The embedded touch-screen display panel structure as in claim 3 , wherein the first direction is perpendicular to the second direction.

5 . The embedded touch-screen display panel structure as in claim 3 , wherein the sensing electrodes operating in the display mode and receiving the common voltage cooperatively create a planar electric field with the pixel electrodes of the corresponding pixel display areas to drive liquid crystals of the liquid crystal layer to rotate.

6 . The embedded touch-screen display panel structure as in claim 3 , wherein each pixel electrode is electrically coupled to the corresponding thin film transistor through vias defined through the first and second insulating layers.

7 . The embedded touch-screen display panel structure as in claim 2 , wherein:
the plurality of drive lines comprises a plurality of first drive lines and a plurality of second drive lines, each of the plurality of first drive lines and each of the plurality of second drive lines being electrically coupled to a touch integrated circuit; the plurality of first drive lines receives touch scanning signals from the touch integrated circuit; the plurality of second drive lines sends touch sensing signals to the touch integrated circuit; and the touch integrated circuit determines touch operations on the pixel display areas according to the touch sensing signals.

8 . The embedded touch-screen display panel structure as in claim 7 , wherein:
each of the plurality of first drive lines comprises a sensing portion and a connecting portion; one first drive line corresponds to a predetermined number of sensing electrodes; the connecting portion of each first drive line electrically couples the sensing portion to the touch integrated circuit; the sensing portion of each first drive line is arranged on one side of the corresponding predetermined number of sensing electrodes to create a mutually capacitive effect between the sensing portion and each of the corresponding sensing electrodes; one second drive line corresponds to each sensing electrode; and each second drive line electrically couples the corresponding sensing electrode to the touch integrated circuit.

9 . The embedded touch-screen display panel structure as in claim 8 , wherein:
the plurality of first drive lines is electrically insulated from the plurality of sensing electrodes; the plurality of first drive lines is electrically insulated from each other; the plurality of first drive lines is electrically insulated from the plurality of second drive lines; and the plurality of second drive lines is electrically insulated from each other.

10 . The embedded touch-screen display panel structure as in claim 8 , wherein:
the plurality of sensing electrodes is arranged in a plurality of rows; and the sensing portion of each first drive line is arranged on one side of a corresponding row of the sensing electrodes to create the mutually capacitive effect between the sensing portion and each of the sensing electrodes of the row.

11 . The embedded touch-screen display panel structure as in claim 10 , wherein:
the rows of sensing electrodes are spaced from each other; and the sensing portion of each first drive line and the plurality of second drive lines corresponding to each row are arranged on corresponding sides of the each row.

12 . The embedded touch-screen display panel structure as in claim 1 , wherein the plurality of sensing electrodes and the plurality of drive lines are formed from a same material during a same manufacturing process.

13 . The embedded touch-screen display panel structure as in claim 1 , wherein the plurality of sensing electrodes and the plurality of drive lines are transparent.

14 . The embedded touch-screen display panel structure as in claim 1 , wherein the plurality of sensing electrodes and the plurality of drive lines are made from indium tin oxide.

15 . An embedded touch-screen display panel structure for an electronic device, the embedded touch-screen display panel structure comprising:
a common electrode layer comprising a plurality of sensing electrodes and a plurality of drive lines, each of the plurality of sensing electrodes operable in a display mode and a touch-sensing mode; and a pixel electrode layer; wherein each of the plurality of sensing electrodes operating in the display mode receives a common voltage to cooperatively induce an electric field with corresponding pixel electrodes of the pixel electrode layer to drive corresponding liquid crystals of a liquid crystal display to rotate to carry out display functions of the display panel structure; wherein each of the plurality of sensing electrodes operating in the touch-sensing mode cooperatively carries out touch-sensing functions of the display panel structure with corresponding drive lines;

Assignees

• Hon Hai Prec Ind Co Ltd

Inventors

• Liu Chia-Lin

Classifications

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/0446

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title

• G06F3/0443

  using a single layer of sensing electrodes · CPC title

• G06F3/04164

  Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads · CPC title

• G06F2203/04103

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