DISPLAY DEVICE

• US 20100277425A1
• Filed: 12/18/2009
• Published: 11/04/2010
• Est. Priority Date: 04/30/2009
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: CHOI, Howon
• Granted Patent: US 8,643,610 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 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
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens

Abstract

An embodiment of this document provides a display device comprising a panel, a touch screen panel, and a sense unit. The panel comprises subpixels placed in a display region defined in one face of a first substrate and a second substrate bonded with the first substrate. The touch screen panel is placed on the panel and configured to comprise electrode units. The sense unit is coupled to the electrode units and configured to sense a position through the electrode units. At least some of the electrode units are formed of a multi-layer with heterogeneous metals.

Claims

1. A display device, comprising:

a panel configured to comprise subpixels placed in a display region defined in one face of a first substrate and a second substrate bonded with the first substrate;

a touch screen panel placed on the panel and configured to comprise electrode units; and

a sense unit coupled to the electrode units and configured to sense a position through the electrode units,

wherein at least some of the electrode units are formed of a multi-layer with heterogeneous metals.

2. The display device of claim 1, wherein at least some of the electrode units are made of metal oxide/metal/metal oxide.

3. The display device of claim 2, wherein a thickness of the metal is thinner than that of the metal oxide.

4. The display device of claim 2, wherein:

the metal oxide comprises any one of tungsten oxide (WO₃), molybdnum oxide (MnO₃), cerium oxide (CeO₂), indium zinc oxide (IZO), tellurium oxide (TeO₂), selenium, oxide (SeO₂), indium tin oxide (ITO), tin oxide (SnO₂), and AZO (Al₂O₃ doped ZnO), and

the metal comprises any one of gold (Au), silver (Ag), aluminum (Al), and copper (Cu).

5. The display device of claim 1, wherein the touch screen panel comprises:

a third substrate adhered to the other face of the second substrate, and

a fourth substrate coalesced with the third substrate,

wherein the electrode units comprise electrodes placed in one face of the third substrate and patterned in one direction.

6. The display device of claim 1, wherein the touch screen panel comprises:

a third substrate adhered to the other face of the second substrate, and

a fourth substrate coalesced with the third substrate,

wherein the electrode units comprise first electrodes and second electrodes patterned in one direction and in the other direction, respectively, in such a way as to intersect each other in one face of the third substrate and the one face of the fourth substrate, respectively.

7. A display device, comprising:

a panel configured to comprise subpixels placed in a display region defined in one face of a first substrate and a second substrate bonded with the first substrate, the subpixels being covered with an interlayer film;

electrode units configured to comprise first electrodes placed on the interlayer film and second electrodes placed on one face of the second substrate, the subpixels and the one face of the second substrate facing each other; and

a sense unit coupled to the electrode units and configured to sense a position through the electrode units,

wherein at least some of the electrode units are formed of a multi-layer with heterogeneous metals.

8. The display device of claim 7, wherein at least some of the electrode units are made of metal oxide/metal/metal oxide.

9. The display device of claim 7, wherein a thickness of the metal is thinner than that of the metal oxide.

10. The display device of claim 8, wherein:

the metal oxide comprises any one of tungsten oxide (WO₃), molybdnum oxide (MnO₃), cerium oxide (CeO₂), indium zinc oxide (IZO), tellurium oxide (TeO₂), selenium oxide (SeO₂), indium tin oxide (ITO), tin oxide (SnO₂), and AZO (Al₂O₃ doped ZnO), and

the metal comprises any one of gold (Au), silver (Ag), aluminum (Al), and copper (Cu).

11. The display device of claim 7, wherein:

one of the first electrodes and the second electrodes is divided and patterned in one direction, and

the other of the first electrodes and the second electrodes is formed in common.

12. A display device, comprising:

a panel configured to comprise subpixels placed in a display region defined between one face of a first substrate and one face of a second substrate and electrode units placed in the second substrate; and

a sense unit coupled to the electrode units and configured to sense a position through the electrode units,

wherein at least some of the electrode units are formed of a multi-layer with heterogeneous metals.

13. The display device of claim 12, wherein at least some of the electrode units are made of metal oxide/metal/metal oxide.

14. The display device of claim 12, wherein a thickness of the metal is thinner than that of the metal oxide.

15. The display device of claim 13, wherein:

the metal oxide comprises any one of tungsten oxide (WO₃), molybdnum oxide (MnO₃), cerium oxide (CeO₂), indium zinc oxide (IZO), tellurium oxide (TeO₂), selenium, oxide (SeO₂), indium tin oxide (ITO), tin oxide (SnO₂), and AZO (Al₂O₃ doped ZnO), and

the metal comprises any one of gold (Au), silver (Ag), aluminum (Al), and copper (Cu).

16. The display device of claim 12, wherein the electrode units comprises electrodes placed in one face of the second substrate which is a face opposite to the subpixels, the electrodes being divided and patterned in one direction.

17. The display device of claim 12, wherein the electrode units comprise electrodes placed in the other face of the second substrate and divided and patterned in one direction, the other face of the second substrate being an opposite face to a face facing the subpixels.

18. The display device of claim 12, wherein the electrode units comprise first electrodes and second electrodes placed in the other face of the second substrate and divided and patterned in one direction and the other direction, respectively, wherein the other face of the second substrate is an opposite face to a face facing the subpixels, and an insulating layer is interposed between the first and second electrodes so that the first and second electrodes intersect each other.