Organic light emitting display

• US 8,330,675 B2
• Filed: 07/21/2009
• Issued: 12/11/2012
• Est. Priority Date: 03/13/2009
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Choi, Howon
• Primary Examiner(s): Mengistu, Amare
• Assistant Examiner(s): Sadio, Insa
• Application Number:
  US12/506,542
• Publication Number:
  US 20100231126A1
• Time in Patent Office: 1,239 Days
• Field of Search: 345 76- 83, 345/104, 345/174, 345/204, 313/496, 313/504, 315/169.3, 257/40
• US Class Current: 345/46
• 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: G09G 3/3208 organic, e.g. using organic light-emitting diodes [OLED]
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens

Abstract

An embodiment of this document provides an organic light emitting diode (OLED) display is provided. The OLED display includes a panel, a driving unit, and a sense unit. The panel includes subpixels, disposed on a first substrate, and electrode patterns disposed on one side of a second substrate. The first substrate and the second substrate are attached to each other, and the electrode patterns are disposed on a side of the second substrate that is facing the first substrate. The driving unit is coupled to the subpixels and configured to supply a scan signal and a data signal to the subpixels. The sense unit is coupled to the electrode patterns and configured to detect a position based on a change in the capacitance formed in the electrode patterns when a user touches the panel.

Claims

1. An organic light emitting diode (OLED) display comprising:

a panel comprising subpixels, disposed on one side of a first substrate, and electrode patterns disposed on a second substrate, wherein the first substrate and the second substrate are attached to each other, and wherein the electrode patterns are disposed on a side of the second substrate that opposites to the first substrate;

a driving unit coupled to the subpixels and configured to supply a scan signal and a data signal to the subpixels; and

a sense unit coupled to the electrode patterns and configured to detect a position based on a change in a capacitance formed in the electrode patterns when a user touches the panel,

wherein the panel comprises;

a ground electrode directly disposed on a side of the second substrate that faces the first substrate and coupled to a negative voltage source,

wherein the ground electrode is a noise filter for preventing noise from being formed in the electrode patterns,

wherein the panel further comprises a coating layer directly disposed on the ground electrode, and

wherein the coating layer is an insulating film for preventing short between the ground electrode and an upper electrode of the subpixels.

2. The OLED display of claim 1, wherein the panel comprises a protection layer configured to cover the electrode patterns.

3. The OLED display of claim 2, wherein the panel comprises an insulating layer disposed between the electrode patterns and the protection layer.

4. The OLED display of claim 1, wherein the electrode patterns comprises lower electrode patterns and upper electrode patterns, and

the panel further comprises:

a first insulating layer disposed between the lower electrode patterns and the protection layer;

wherein the upper electrode patterns are disposed on the first insulating layer and disposed in respective areas not overlapping the lower electrode patterns.

5. The OLED display of claim 4, wherein the panel further comprises a second insulating layer disposed on the upper electrode patterns.