Capacitive in-cell touch panel, method for manufacturing the same and display device

• US 9,477,361 B2
• Filed: 04/22/2014
• Issued: 10/25/2016
• Est. Priority Date: 12/27/2013
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Zhao, Lijun
• Primary Examiner(s): Patel, Sanjiv D
• Application Number:
  US14/415,100
• Publication Number:
  US 20160004346A1
• Time in Patent Office: 917 Days
• US Class Current: 1/1
• CPC Class Codes: G02F 1/134318 having a patterned common electrode
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

The present disclosure provides a capacitive in-cell touch panel, its manufacturing method and a display device. The capacitive in-cell touch panel includes a plurality of gate scanning lines and a plurality of data lines arranged perpendicular to each other; a plurality of common electrodes, to which a common electrode signal is applied during a display period and a touch scanning signal is applied during a touch period, so that the common electrodes are also used as touch driving electrodes; and a plurality of touch sensing electrodes arranged at a layer identical to the data lines and at a region corresponding to the gate scanning lines, the touch sensing electrodes outputting a touch sensing signal during the touch period, wherein the touch driving electrodes and the touch sensing electrodes are arranged in a crisscross manner and insulated from each other.

Claims

1. A capacitive in-cell touch panel, comprising:

a plurality of gate scanning lines and a plurality of data lines arranged perpendicular to each other;

a TFT and a pixel electrode arranged at a pixel region defined by the adjacent gate scanning lines and the adjacent data lines;

a plurality of common electrodes, to which a common electrode signal is applied during a display period and a touch scanning signal is applied during a touch period, so that the common electrodes are also used as touch driving electrodes; and

a plurality of touch sensing electrodes arranged at a layer identical to the data lines and at a region corresponding to the gate scanning lines, the touch sensing electrodes outputting a touch sensing signal during the touch period,

wherein the touch driving electrodes and the touch sensing electrodes are arranged in a crisscross manner and insulated from each other; and

wherein the touch sensing electrode is arranged perpendicular to the data line and broken at a junction with the data line, and the broken parts are bridged together through a pixel electrode material which is formed together with the pixel electrode simultaneously.

2. The capacitive in-cell touch panel according to claim 1, further comprising:

a plurality of metal driving electrodes arranged at a layer identical to the gate scanning lines and at regions corresponding to the data lines, and connected to corresponding common electrodes arranged above the plurality of metal driving electrodes.

3. The capacitive in-cell touch panel according to claim 2, wherein the metal driving electrode is arranged perpendicular to the gate scanning line and broken at a junction with the gate scanning line, and the broken parts are bridged together through a second transparent electrode.

4. The capacitive in-cell touch panel according to claim 3, wherein the second transparent electrode and the common electrode are formed simultaneously.

5. The capacitive in-cell touch panel according to claim 1, comprising in turn:

a substrate;

the gate scanning lines, gate electrodes of the TFTs and the metal driving electrodes;

a gate insulating layer;

the common electrodes connected to the metal driving electrodes through via-holes in the gate insulating layer;

an insulating layer;

an active layer of the TFTs;

the data lines, source electrodes and drain electrodes of the TFTs, and the touch sensing electrodes;

a protection layer; and

the pixel electrodes,

wherein the metal driving electrode and the gate scanning line are arranged at an identical layer in a crisscross manner, the metal driving electrode is broken at the junction with the gate scanning line, and the broken parts are bridged together through the second transparent electrode which is formed together with the common electrode simultaneously, and

wherein the touch sensing electrode and the data line are arranged at an identical layer in a crisscross manner, the touch sensing electrode is broken at the junction with the data line, and the broken parts are bridged together through the pixel electrode material which is formed together with the pixel electrode simultaneously.

6. A display device comprising the capacitive in-cell touch panel according to claim 1.

7. The display device according to claim 6, further comprising:

a plurality of metal driving electrodes arranged at a layer identical to the gate scanning lines and at regions corresponding to the data lines, and connected to corresponding common electrodes arranged above the plurality of metal driving electrodes.

8. The display device according to claim 7, wherein the metal driving electrode is arranged perpendicular to the gate scanning line and broken at a junction with the gate scanning line, and the broken parts are bridged together through a second transparent electrode.

9. The display device according to claim 8, wherein the second transparent electrode and the common electrode are formed simultaneously.

10. The display device according to claim 6, comprising in turn:

a substrate;

the gate scanning lines, gate electrodes of the TFTs and the metal driving electrodes;

a gate insulating layer;

the common electrodes connected to the metal driving electrodes through via-holes in the gate insulating layer;

an insulating layer;

an active layer of the TFTs;

the data lines, source electrodes and drain electrodes of the TFTs, and the touch sensing electrodes;

a protection layer; and

the pixel electrodes,

wherein the metal driving electrode and the gate scanning line are arranged at an identical layer in a crisscross manner, the metal driving electrode is broken at the junction with the gate scanning line, and the broken parts are bridged together through the second transparent electrode which is formed together with the common electrode simultaneously, and

wherein the touch sensing electrode and the data line are arranged at an identical layer in a crisscross manner, the touch sensing electrode is broken at the junction with the data line, and the broken parts are bridged together through the pixel electrode material which is formed together with the pixel electrode simultaneously.

11. A method for manufacturing a capacitive in-cell touch panel, comprising:

a step of forming gate scanning lines;

a step of forming data lines and touch sensing electrodes, the touch sensing electrodes and the data lines being arranged at an identical layer, the touch sensing electrodes being arranged at regions corresponding to the gate scanning lines, and the touch sensing electrodes outputting a touch sensing signal during a touch period;

a step of forming common electrodes, to which a common electrode signal is applied during a display period and a touch scanning signal is applied during the touch period so that the common electrodes are also used as touch driving electrodes; and

a step of forming a pixel electrode and a pixel electrode material simultaneously, the pixel electrode being arranged at a pixel region defined by the adjacent gate scanning lines and the adjacent data lines, the touch sensing electrode and the data line being arranged perpendicular to each other, the touch sensing electrode being broken at a junction with the data line, and the broken parts being bridged together through the pixel electrode material,

wherein the touch driving electrode and the touch sensing electrode are arranged in a crisscross manner and insulated from each other.

12. The method according to claim 11, wherein a metal driving electrode is formed while forming the gate scanning line, and the metal driving electrode is arranged at a layer identical to the gate scanning line and at a region corresponding to the data line, and connected to the corresponding common electrode above the metal driving electrode.

13. The method according to claim 12, wherein a second transparent electrode is formed while forming the common electrode, the metal driving electrode is arranged perpendicular to the gate scanning line and broken at a junction with the gate scanning line, and the broken parts are bridged together through the second transparent electrode.

14. The method according to claim 11, comprising:

providing a substrate;

forming the gate scanning lines, gate electrodes of TFTs and the metal driving electrodes on the substrate;

forming a gate insulating layer on the substrate with the gate scanning lines, the gate electrodes of the TFTs and the metal driving electrodes;

forming the common electrodes and the second transparent electrodes on the substrate with the gate insulating layer, the common electrode being connected to the metal driving electrode through a via-hole in the gate insulating layer, the metal driving electrode and the gate scanning line being arranged in a crisscross manner, the meal driving electrode being broken at the junction with the gate scanning line, and the broken parts being bridged together through the second transparent electrode;

forming an insulating layer on the substrate with the common electrodes;

forming an active layer of the TFTs on the substrate with the insulating layer;

forming the data lines, source electrodes and drain electrodes of the TFTs, and the touch sensing electrodes on the substrate with the active layer;

forming a protection layer on the substrate with the data lines, the source electrodes and the drain electrodes of the TFTs, and the touch sensing electrodes; and

forming the pixel electrodes and the pixel electrode materials on the substrate with the protection layer, the touch sensing electrode and the data line being arranged in a crisscross manner, the touch sensing electrode being broken at the junction with the data line, and the broken parts being bridged together through the pixel electrode material.