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

• US 20130257774A1
• Filed: 03/29/2013
• Published: 10/03/2013
• Est. Priority Date: 03/30/2012
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Kim, Cheolse, Han, Manhyeop
• Granted Patent: US 8,970,532 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• 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 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• 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
• CPC Class Codes: H01L 27/1259 Multistep manufacturing methods

Abstract

A touch sensor integrated type display device includes a plurality of first electrodes arranged on a substrate in parallel in a first direction; a plurality of second electrodes arranged in parallel in the first direction and a second direction crossing the first direction without contacting the plurality of first electrodes; a plurality of first connecting wires, each first connecting wire being connected with at least one of the plurality of the first electrodes; and a plurality of second connecting wires, each second connecting wire connecting the second electrodes to each other in the second direction, wherein a touch driving voltage is supplied to the plurality of first connecting wires and a common voltage is supplied to the plurality of second connecting wires so that mutual capacitance is generated between the plurality of first electrodes and the plurality of second electrodes.

Claims

1. A touch sensor integrated type display device comprising:

a plurality of first electrodes arranged on a substrate in parallel in a first direction;

a plurality of second electrodes arranged in parallel in the first direction and a second direction crossing the first direction without contacting the plurality of first electrodes;

a plurality of first connecting wires, each first connecting wire being connected to at least one of the plurality of the first electrodes; and

a plurality of second connecting wires, each second connecting wire connecting the second electrodes to each other in the second direction,

wherein a touch driving voltage is supplied to the plurality of first connecting wires and a common voltage is supplied to the plurality of second connecting wires so that mutual capacitance is generated between the a plurality of first electrodes and the plurality of second electrodes.

2. The touch sensor integrated type display device of claim 1, wherein each of the plurality of second connecting wires includes at least two sub-connecting wires.

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

4. The touch sensor integrated type display device of claim 1, wherein the first plurality of electrodes and the first and second connecting wires are made of a metal material selected from the group consisting of Cu, CuOx, Al, AlNd, Mo, MoTi, and Cr, and wherein the second plurality of electrodes are made of a transparent conductive material selected from the group consisting of indium tin oxide (ITO), indium zinc oxide (IZO), gallium-doped zinc oxide (GZO).

5. A touch sensor integrated type display device comprising:

gate lines and data lines formed on a substrate to cross over each other;

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

a plurality of first electrodes arranged in parallel with the gate lines;

a plurality of second electrodes arranged in parallel with the gate lines and the data lines without contacting the plurality of first electrodes;

a plurality of first connecting wires, each first connecting wire being connected with at least one of the plurality of the first electrodes; and

a plurality of second connecting wires, each second connecting wire connecting the second electrodes to each other in parallel with the data line,

wherein a touch driving voltage is supplied to the plurality of first connecting wires during a touch mode and a common voltage is supplied to the plurality of second connecting wires during a display mode so that mutual capacitance is generated between the plurality of first electrodes and the plurality of second electrodes.

6. The touch sensor integrated type display device of claim 5, wherein each of the plurality of second connecting wires includes at least two sub-connecting wires.

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

8. The touch sensor integrated type display device of claim 5, wherein the first plurality of electrodes and the first and second connecting wires are made of a metal material selected from the group consisting of Cu, CuOx, Al, AlNd, Mo, MoTi, and Cr, and wherein the second plurality of electrodes are made of a transparent conductive material selected from the group consisting of indium tin oxide (ITO), indium zinc oxide (IZO), gallium-doped zinc oxide (GZO).

9. The touch sensor integrated type display device of claim 5, wherein any one of the pixel electrode and the second electrode includes a plurality of openings, which elongate in an area overlapping the pixel electrode to be spaced apart from each other at a predetermined distance.

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

forming a first conductive layer on a substrate;

forming a gate line and a gate electrode using first mask process;

forming a gate insulation layer on the substrate on which the gate line and the gate electrode are formed, forming a semiconductor layer on the gate insulation layer, and forming a semiconductor pattern on a region of the gate insulation layer corresponding to the gate electrode by patterning the semiconductor layer using a second mask process;

forming a data metal layer as a second conductive layer on the gate insulation layer, and forming first conductive pattern group including a data line, a source electrode extended from the data lines and a drain electrode opposite to the source electrode by patterning the data metal layer using a third mask process;

forming a first passivation layer on an entire surface of the gate insulation layer on which the first conductive pattern group is formed, and forming a first contact hole exposing a portion of the drain electrode by etching the first passivation layer using a fourth mask process;

forming a first transparent conductive layer as a third conductive layer on the first passivation layer in which the first contact hole is formed, and forming a pixel electrode by patterning the first transparent conductive layer using a fifth mask process;

forming a second passivation layer and a fourth conductive layer on the first passivation layer on which the pixel electrode is formed, and forming a plurality of first electrodes by etching the fourth conductive layer using a sixth mask process, the plurality of first electrodes being arranged in parallel with the gate line; and

forming a third passivation layer on the second passivation layer on which the plurality of first electrodes are formed, forming a second transparent conductive layer as a fifth conductive layer on the third passivation layer, and forming a plurality of second electrodes by etching the second transparent conductive layer using a seventh mask process, the plurality of second electrodes being arranged in parallel with the gate lines and the data lines.

11. The method of claim 10, wherein the method further comprises:

forming a sixth conductive layer on the second passivation layer on which the plurality of the first electrodes are formed, and forming a plurality of first connecting wires connecting the plurality of the first electrodes to each other by etching the sixth conductive layer.

12. The method of claim 11, wherein the method further comprises:

forming a seventh conductive layer on the third passivation layer on which the plurality of the second electrodes are formed, and forming a plurality of first connecting wires connecting the plurality of the second electrodes to each other in parallel with the data line by etching the seventh conductive layer.

13. The method of claim 12, wherein the plurality of second electrodes serve as common electrodes and touch sensing electrodes.

14. The method of claim 12, wherein the first plurality of electrodes and the first and second connecting wires are made of a metal material selected from the group consisting of Cu, CuOx, Al, AlNd, Mo, MoTi, and Cr, and wherein the second plurality of electrodes are made of a transparent conductive material selected from the group consisting of indium tin oxide (ITO), indium zinc oxide (IZO), and gallium-doped zinc oxide (GZO).