TOUCH SENSOR INTEGRATED TYPE DISPLAY DEVICE AND METHOD OF MANUFACTURING THE SAME

• US 20140160066A1
• Filed: 09/13/2013
• Published: 06/12/2014
• Est. Priority Date: 12/11/2012
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Kim, Cheolse, Han, Manhyeop, Kim, Juhan, Kim, Hoonbae, Han, Sungsu, Kim, Jinseong
• Granted Patent: US 9,535,523 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/134372 for fringe field switching [FFS] where the common electrode is not patterned
• CPC Class Codes: G02F 1/13629 Multilayer wirings
• 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 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• 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

A touch sensor integrated type display device includes a plurality of gate lines, a plurality of data lines crossing over the plurality of the gate lines, a plurality of pixel electrodes formed in areas defined by crossing over the gate lines and the data lines, a plurality of first electrodes formed between pixel electrodes which are neighbored to each other with a gate line therebetween, a plurality of second electrodes, each of the second electrodes formed to overlap with at least one portion of the pixel electrode and arranged in parallel with the gate line, wherein one of the first and second electrodes serve as common electrodes for driving the display device.

Claims

1. A touch sensor integrated type display device comprising:

a plurality of gate lines;

a plurality of data lines crossing over the plurality of the gate lines;

a plurality of pixel electrodes formed in areas defined by crossing over the gate lines and the data lines;

a plurality of first electrodes formed between pixel electrodes which are neighbored to each other with a gate line therebetween;

a plurality of second electrodes, each of the second electrodes formed to overlap with at least one portion of the pixel electrode and arranged in parallel with the gate line,

wherein one of the first and second electrodes serve as common electrodes for driving the display device.

2. The touch sensor integrated type display device of claim 1, wherein the first plurality of electrodes are touch sensing electrodes, and the second plurality of electrodes are touch driving electrodes serving as common electrodes.

3. The touch sensor integrated type display device of claim 1, wherein the first plurality of electrodes are touch driving electrodes, and the second plurality of electrodes are touch sensing electrodes serving as common electrodes.

4. The touch sensor integrated type display device of claim 1, further comprising at least one first electrode resistance reducing wire formed on the each of the first electrodes, thereby reducing resistance of the first electrode.

5. The touch sensor integrated type display device of claim 1, further comprising:

a gate insulation layer between the gate lines and the data lines to cover the gate lines;

a plurality of thin film transistors formed in pixel areas defined by crossings of the gate lines and the data lines;

a first passivation layer covering the gate insulation layer on which the thin film transistors are formed;

a second passivation layer covering the first electrodes which are formed on the first passivation layer to be in parallel with the data lines and formed in at least two pixel area neighbored to each other with a gate line therebetween; and

a plurality of pixel electrodes formed on the second passivation layer in the pixel areas, respectively, each of the pixel electrodes being overlap with the at least one portion of the first electrode; and

wherein the second electrodes are formed on the second passivation layer between the pixel electrodes which are neighbored to each other with the gate line therebetween, and formed in parallel with the gate line, and

wherein one of the first and second electrodes serve as common electrodes for driving the display device.

6. The touch sensor integrated type display device of claim 5, wherein the first plurality of electrodes are touch driving electrodes serving as common electrodes, and the second plurality of electrodes are touch sensing electrodes.

7. The touch sensor integrated type display device of claim 5, wherein the first plurality of electrodes are touch sensing electrodes serving as common electrodes, and the second plurality of electrodes are touch driving electrodes.

8. The touch sensor integrated type display device of claim 5, further comprising at least one second electrode resistance reducing wire formed on the each of the second electrodes, thereby reducing resistance of the second electrode.

9. The touch sensor integrated type display device of claim 1, further comprising:

a gate insulation layer between the data lines to cover the gate lines;

a plurality of thin film transistors formed in pixel areas defined by crossings of the gate lines and the data lines, respectively;

a first passivation layer covering the gate insulation layer on which the thin film transistors are formed;

a plurality of pixel electrodes formed on the first passivation layer in the pixel areas, respectively; and

a second passivation layer covering the plurality of first electrodes which are formed on the first passivation layer to be in parallel with the gate lines between the pixel electrodes neighbored to each other with a gate line therebetween,

wherein the plurality of second electrodes are formed on the second passivation layer in at least two pixel areas with a gate line therebetween, a portion of each second electrode being overlapped with the pixel electrode to be in parallel with the data line, and

wherein one of the first and second electrodes serve as common electrodes for driving the display device.

10. The touch sensor integrated type display device of claim 9, wherein the first plurality of electrodes are touch sensing electrodes, and the second plurality of electrodes are touch driving electrodes serving as common electrodes.

11. The touch sensor integrated type display device of claim 9, wherein the first plurality of electrodes are touch driving electrodes, and the second plurality of electrodes are touch sensing electrodes serving as common electrodes.

12. The touch sensor integrated type display device of claim 9, further comprising at least one first electrode resistance reducing wire formed on the each of the first electrodes, thereby reducing resistance of the first electrode.

13. A method of manufacturing a touch sensor integrated type display device comprising:

depositing a first conductive layer on a substrate, and then forming a plurality of gate lines and gate electrodes using a first mask process;

sequentially forming a gate insulating layer and a semiconductor layer on the substrate on which the gate lines and gate electrodes are formed, and then forming semiconductor patterns opposite to the gate electrodes by patterning the semiconductor layer using a second mask process;

depositing a second conductive layer on the gate insulation layer on which the semiconductor patterns are formed, and then forming a first conductive pattern group including a plurality of data lines in parallel with each other, source electrodes extended from the data lines, and drain electrodes opposite to the source electrodes by patterning the second conductive layer using a third mask process;

sequentially forming a first passivation layer and a third conductive layer on the gate insulation layer on which the first conductive pattern group are formed, and then forming a plurality of first electrodes by patterning the third conductive layer using a fourth mask process;

depositing a fourth conductive layer on the first passivation layer on which the first electrodes are formed, and then forming at least one first electrode resistance reducing wire connected to each of the first electrodes by patterning the fourth conductive layer using a fifth mask process;

forming a second passivation layer on the first passivation layer on which the first electrodes and the first electrode resistance reducing wires are formed, and then forming a contact hole exposing a portion of each the drain electrodes by patterning the first and second passivation layers using a sixth mask process;

depositing a fifth conductive layer on the second passivation layer with the contact hole, and then forming second electrode resistance reducing wires in parallel with the gate line by patterning the fifth conductive layer using a seventh mask process; and

depositing a sixth conductive layer on the second passivation layer on which the second electrode resistance reducing wires are formed, and then forming a plurality of pixel electrodes and a plurality of second electrodes by patterning the sixth conductive layer using the eighth mask process,

wherein one of the first and second electrodes serve as common electrodes for driving the display device.

14. The method of claim 13, wherein the first electrodes are formed in parallel with the data lines, and formed in at least two pixel areas of pixel areas with the gate line therebetween, and defined by crossings of the gate lines and the data lines and have the gate line therebetween,

the plurality of first electrode resistance reducing wires are overlapped with the plurality of first electrodes, respectively, thereby reducing resistance of the first electrode,

the plurality of pixel electrodes are formed in the pixel areas;

the plurality of electrodes formed in parallel with each other on the second passivation layer between the pixel electrodes which are neighbored to each other with the gate line therebetween, and

the at least one second electrode resistance reducing wire is formed on each of the plurality of second electrodes, thereby reducing resistance of the second electrode.

15. A method of manufacturing a touch sensor integrated type display device comprising:

depositing a first conductive layer on a substrate and then forming a plurality of gate lines and gate electrodes using a first mask process;

sequentially forming a gate insulating layer and a semiconductor layer on the substrate on which the gate lines and gate electrodes are formed, and then forming semiconductor patterns opposite to the gate electrodes by patterning the semiconductor layer using a second mask process;

depositing a second conductive layer on the gate insulation layer on which the semiconductor patterns are formed, and then forming a first conductive pattern group including a plurality of data lines in parallel with each other, source electrodes extended from the data lines, and drain electrodes opposite to the source electrodes by patterning the second conductive layer using a third mask process;

forming a first passivation layer on the gate insulation layer on which the first conductive pattern group are formed, and then forming a plurality of contact holes exposing a portion of each the drain electrodes by etching the first passivation layer using a fourth mask process;

depositing a third conductive layer on the first passivation layer with the contact holes, and then forming a plurality of first electrodes and a plurality of pixel electrodes connected to the drain electrodes exposed through the contact holes by patterning the third conductive layer using a fifth mask process;

forming a fourth conductive layer on the first passivation layer on which the first electrodes and the pixel electrodes are formed, and then forming at least one first electrode resistance reducing wire by patterning the fourth conductive layer using a sixth mask process, the at least one first electrode resistance reducing wire being formed on each of the first electrodes to reduce resistance of the first electrode;

sequentially forming a second passivation layer and a fifth conductive layer on the first passivation on which the first electrodes and the first electrode resistance reducing wires are formed, and then forming at least one second electrode resistance reducing wire in parallel with the data line by patterning the fifth conductive layer using a seventh mask process; and

forming a sixth conductive layer on the second passivation layer on which the second electrode resistance reducing wires are formed, and then forming a plurality of a plurality of second electrodes by patterning the sixth conductive layer using the eighth mask process, each of the plurality of a plurality of second electrodes being connected to the at least one second electrode resistance reducing wire,

wherein one of the first and second electrodes serve as common electrodes for driving the display device.

16. The method of claim 15, wherein the pixel electrodes are formed in areas defined by crossing of the gate lines and the data lines,

the first electrode is formed in parallel with the gate line between the pixel electrodes which are neighbored to each other with the gate line therebetween,

the at least one first electrode resistance reducing wire is formed be in overlapped with each of the first electrodes, thereby reducing resistance of the first electrode,

the second electrode is formed in at least two pixel area with the gate line therebetween so that at least one portion thereof is overlapped with the pixel, and in parallel with the data line, and

the at least one first electrode resistance reducing wire is formed be in overlapped with each of the second electrodes, thereby reducing resistance of the second electrode.