Liquid crystal display device and method for fabricating the same

• US 7,576,812 B2
• Filed: 07/11/2007
• Issued: 08/18/2009
• Est. Priority Date: 12/29/2000
• Status: Expired due to Term

• Current Assignee: LG Philips LCD Company Limited (LG Display Co., Ltd.)
• Original Assignee: LG Display Co., Ltd.
• Inventors: Seo, Hyun Sik, Kim, Jeong Hyun
• Primary Examiner(s): Dudek; James A
• Application Number:
  US11/826,003
• Publication Number:
  US 20080018829A1
• Time in Patent Office: 769 Days
• Field of Search: 349/69
• US Class Current: 349/69
• CPC Class Codes: G02F 1/133603 with LEDs

Abstract

A liquid crystal display (LCD) device includes a first substrate and a second substrate, an organic light emitting element formed by interposing a first insulating layer on an outer surface of the first substrate, a second insulating layer and a protective layer formed in order over an entire surface of the organic light emitting element, a thin film transistor formed on the first substrate, a passivation layer formed over an entire surface of the first substrate including the thin film transistor, a pixel electrode formed on the passivation layer to be connected to the thin film transistor, a common electrode formed on the second substrate, and a liquid crystal layer formed between the first substrate and the second substrate. A method for fabricating the LCD includes the steps of forming a first insulating layer on an outer surface of a first substrate, forming an organic light emitting element on the first insulating layer, forming a second insulating layer over an entire surface of the organic light emitting element, forming a protective layer on the second insulating layer, forming a thin film transistor on the first substrate, forming a passivation layer over an entire surface of the first substrate including the thin film transistor, forming a pixel electrode on the passivation layer, and forming a liquid crystal layer between the first substrate and a second substrate.

Claims

1. A method for fabricating a liquid crystal display (LCD) device, comprising:

depositing an inorganic insulating layer on a first surface of a first substrate, wherein the inorganic insulating layer is made of one of silicon oxide and silicon nitride;

after depositing the inorganic insulating layer, sequentially depositing a first electrode on the inorganic insulating layer, an organic light emitting layer on the first electrode and a second electrode on the organic light emitting layer to form an organic light emitting diode;

after forming the organic light emitting diode , depositing a protective layer to protect the organic light emitting diode;

forming a thin film transistor array for a liquid crystal display panel on a second surface of the first substrate;

providing a liquid crystal layer for the liquid crystal display panel on the second surface of the first substrate; and

attaching the first substrate to a second substrate for the liquid crystal display panel,

wherein the liquid crystal panel and the organic light emitting diode use the first substrate in common.

2. The method of claim 1, wherein forming the organic light emitting layer comprises:

forming a hole transport layer;

forming an light emitting layer; and

forming an electron transport layer.

3. The method of claim 2, wherein the organic light emitting layer comprises any one of Alq3 (tris-8-hydroxyquinolinato aluminum), BeBq (bis-benzo-quinolinato-berellium), PPV (polyphenylenevinylene) or polyalkyithiphene.

4. The method of claim 1, wherein the first electrode is indium tin oxide.

5. The method of claim 1, wherein the first substrate is comprised of an organic material.

6. The method of claim 5, wherein the first substrate performs an additional function of polarization.

7. The method of claim 1, wherein the protective layer includes SiOx or IOx.