In-cell self capacitive touch control display panel and manufacture method thereof

Patent metadata

Field	Value
Publication number	US-9715303-B2
Application number	US-201514781592-A
Country	US
Kind code	B2
Filing date	Aug 24, 2015
Priority date	Aug 3, 2015
Publication date	Jul 25, 2017
Grant date	Jul 25, 2017

Abstract

The present invention provides an in-cell self capacitive touch control display panel and a manufacture method thereof. The in-cell self capacitive touch control display panel comprises: an array substrate, a CF substrate and a liquid crystal layer arranged between the array substrate and the CF substrate, and light is incident from a CF substrate side, and exits out of an array substrate side. The array substrate comprises: a plurality of gate scan lines ( 11 ) separately arranged along a horizontal direction, a plurality of data lines ( 41 ) separately arranged along a vertical direction, and a plurality of pixel electrodes ( 50 ) aligned in array; a touch scanning line is commonly shared with the gate scan line ( 11 ), and a touch receiving line is commonly shared with the data line ( 41 ), and a touch control self capacitance is commonly shared with the pixel electrode ( 50 ), under the premise of not adding more to the present process flow of the array substrate, the in-cell self capacitive touch control function can be realized and the driving cost of the panel can be reduced. The manufacture method of the in-cell self capacitive touch control display panel can reduce the driving cost of the panel without adding more to the present process flow of the array substrate.

First claim

What is claimed is:

1. An in-cell self capacitive touch control display panel, comprising: an array substrate, a CF substrate and a liquid crystal layer arranged between the array substrate and the CF substrate, and light is incident from a CF substrate side, and exits out of an array substrate side;
the array substrate comprises: a plurality of gate scan lines separately arranged along a horizontal direction, a plurality of data lines separately arranged along a vertical direction, and a plurality of pixel electrodes aligned in array, and the plurality of gate scan lines separately arranged along the horizontal direction and the plurality of data lines separately arranged along the vertical direction are mutually insulated and staggered to divide a plurality of sub pixel areas; each pixel electrode is correspondingly located in one sub pixel area;
a touch scanning line is commonly shared with the gate scan line, and a touch receiving line is commonly shared with the data line, and a touch control self capacitance is commonly shared with the pixel electrode;
time of one frame of image is divided into a display period and a touch control period; in the display period, the gate scan line transmits a gate scan signal, and the data line transmits a pixel gray scale signal, and the pixel electrode is employed to form a storage capacitor and a liquid crystal capacitor; in the touch control period, the gate scan line is employed to be the touch scanning line to transmit a touch scanning signal, and the data line is employed to be the touch receiving line to sense a touch signal, and the pixel electrode is employed to be the touch control self capacitance.

2. The in-cell self capacitive touch control display panel according to claim 1 , wherein the array substrate further comprises: a TFT located correspondingly to each pixel electrode, and a plurality of common electrodes located opposite to the pixel electrodes;
a gate isolation layer covering the gate scan line, a gate of the TFT, and the data line is located on the gate isolation layer, and an island shape active layer of the TFT is located on the gate isolation layer, and a source and a drain of the TFT are respectively coupled to the island shape active layer, and the pixel electrode is located on the gate isolation layer and coupled to a drain of the TFT, and an insulation protective layer covering the data line, the pixel electrode, the source and the drain of the TFT, and the common electrode is paved on the insulation protective layer.

3. The in-cell self capacitive touch control display panel according to claim 2 , wherein the pixel electrode is flat, and the common electrode has a whole sheet structure covering all the sub pixel areas; the common electrode is provided with a plurality of long strip via holes in a region corresponding to each pixel electrode.

4. The in-cell self capacitive touch control display panel according to claim 2 , wherein all materials of the gate scan line, the data line, and the gate, the source, the drain of the TFT are one or more combination of molybdenum, aluminum and copper, and all thicknesses are 3000-6000 Å.

5. The in-cell self capacitive touch control display panel according to claim 2 , wherein both materials of the pixel electrode and the common electrode are ITO, and both thicknesses are 400-1000 Å.

6. The in-cell self capacitive touch control display panel according to claim 2 , wherein both materials of the gate isolation layer and the insulation protective layer are Silicon Nitride, and both thicknesses are 2000-5000 Å; material of the island shape active layer is amorphous silicon and n-type heavy doped amorphous silicon, and a thickness of the island shape active layer is 1500-3000 Å.

7. A manufacture method of an in-cell self capacitive touch control display panel, comprising steps of:
step 1 , providing a substrate and deposing a first metal layer on the substrate, and implementing pattern process to the first metal layer to form a gate scan line and a gate in one with the gate scan line;
the gate scan line is also employed to be a touch scanning line;
step 2 , deposing a gate isolation layer on the gate scan line and the gate, then deposing a semiconductor layer on the gate isolation layer, and implementing pattern process to the semiconductor layer to form an island shape active layer;
step 3 , deposing a second metal layer on the island shape active layer and the gate isolation layer, then implementing pattern process to the second metal layer to form a data line, a source in one with the data line and connected with the island shape active layer, and a drain connected to the island shape active layer;
the gate, the source, the drain and the island shape active layer construct a TFT;
the data line is also employed to be a touch receiving line;
step 4 , deposing a first transparent conductive thin film on the gate isolation layer, the data line, the source and the drain, then implementing pattern process to the first transparent conductive thin film to form a plurality of pixel electrodes aligned in array, and each pixel electrode is correspondingly coupled to the drain of one TFT;
the pixel electrode is also employed to be a touch control self capacitance;
step 5 , deposing an insulation protective layer on the data line, the pixel electrode, the source and the drain, and implementing pattern process to the insulation protective layer;
step 6 , deposing a second transparent conductive thin film on the insulation protective layer, and implementing pattern process to the second transparent conductive thin film to form a whole sheet common electrode located opposite to all the pixel electrodes, and the whole sheet common electrode is provided with a plurality of long strip via holes in a region corresponding to each pixel electrode manufacture of the array substrate is accomplished;
step 7 , providing a CF substrate, and oppositely assembling the CF substrate and the array substrate, and injecting liquid crystals to form a liquid crystal layer.

8. The manufacture method of the in-cell self capacitive touch control display panel according to claim 7 , wherein in the step 1 , the first metal layer is deposed by physical vapor deposition, and the pattern process to the first metal layer comprises photoresist coating, and implementing exposure, development, wet etching and photoresist stripping with a mask;
in the step 2 , the gate isolation layer and the semiconductor layer are deposed by plasma enhanced chemical vapor deposition, and the pattern process to the semiconductor layer comprises photoresist coating, and implementing exposure, development, dry etching and photoresist stripping with a mask;
in the step 3 , the second metal layer is deposed by physical vapor deposition, and the pattern process to the second metal layer comprises exposure, development, wet etching and photoresist stripping;
in the step 4 , the first transparent conductive thin film is deposed by physical vapor deposition, and the pattern process to the first transparent conductive thin film comprises exposure, development, wet etching and photoresist stripping;
in the step 5 , the insulation protective layer is deposed by plasma enhanced chemical vapor deposition, and the pattern process to the insulation protective layer comprises photoresist coating, and implementing exposure, development, dry etching and photoresist stripping with a mask;
in the step 6 , the second transparent conductive thin film is deposed by physical vapor deposition, and the pattern process to the second transparent conductive thin film comprises photoresist coating, and implementing exposure, development, wet etching and photoresist stripping.

9. The manufacture method o

Assignees

• Shenzhen China Star Optoelect

Inventors

• Xu Xiangyang

Classifications

• G02F2202/103

  a-Si · CPC title

• G02F1/1368

  in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} · CPC title

• G02F2201/50

  Protective arrangements · CPC title

• G02F1/13439

  characterised by their electrical, optical, physical properties; materials therefor; method of making · CPC title

• G06F3/044 Primary

  by capacitive means · CPC title