Display device

• US 8,952,918 B2
• Filed: 01/10/2014
• Issued: 02/10/2015
• Est. Priority Date: 04/30/2009
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Choi, Howon
• Primary Examiner(s): Chow, Van
• Application Number:
  US14/152,396
• Publication Number:
  US 20140125889A1
• Time in Patent Office: 396 Days
• Field of Search: 345/173
• 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 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 made of stacked metal oxide, metal and metal oxide sequentially,

wherein a thickness of the metal is thinner than that of the metal oxide for improving light transmissivity in the visible region and sheet resistance of the metal oxide.

2. The display device of claim 1, 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).

3. The display device of claim 1, 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.

4. The display device of claim 1, 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.

5. The display device of claim 1, 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.