Liquid crystal display device and method for fabricating the same

• US 7,248,309 B2
• Filed: 06/27/2001
• Issued: 07/24/2007
• Est. Priority Date: 12/29/2000
• Status: Expired due to Term

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Philips LCD Company Limited (LG Display Co., Ltd.)
• Inventors: Kim, Jeong Hyun, Seo, Hyun Sik
• Primary Examiner(s): TON, MINH TOAN T
• Application Number:
  US09/891,534
• Publication Number:
  US 20020085143A1
• Time in Patent Office: 2,218 Days
• Field of Search: 349 69- 71, 349/106, 349/110, 313/504, 313/300, 313/508, 313/500, 315/169.3, 359/169.3
• 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 liquid crystal display (LCD) device comprising:

a first substrate and a second substrate;

an inorganic insulating layer made of one of silicon oxide and silicon nitride on a first side of the first substrate;

a light emitting structure including an organic light emitting layer on the inorganic insulating layer;

a protective layer on the light emitting structure to protect the light emitting structure;

a thin film transistor (TFT) array structure including thin film transistors and pixel electrodes on a second side of the first substrate, wherein the first side is opposite to the second side;

a common electrode on a surface of the second substrate; and

a liquid crystal layer between the first substrate and the second substrate, whereby the light emitting structure shares the first substrate with the TFT array structure.

2. The LCD of claim 1, wherein the light emitting structure is a light emitting diode.

3. The LCD of claim 1, wherein the light emitting structure comprises:

a first electrode disposed on the inorganic insulating layer;

the organic light emitting layer on the first electrode; and

a second electrode on the organic light emitting layer.

4. The LCD of claim 3, wherein the organic light emitting layer comprises:

a hole transport layer;

an organic light emitting layer; and

an electron transport layer.

5. The LCD of claim 1, wherein the organic light emitting layer comprises any one of Alq3 (tris-8-hydroxyquinolinato aluminum), BeBq (bis-benzo-quinolinato-berellium), PPV (polyphenylenevinylene) or polyalkylthiphene.

6. The LCD of claim 3, wherein the first electrode is indium tin oxide.

7. The LCD of claim 1, wherein the first substrate is composed of an organic material.

8. The LCD of claim 7, wherein the first substrate performs an additional function of polarization.

9. The LCD of claim 1, wherein the protective layer includes SiOx or IOx.