Liquid crystal display device and method for fabricating the same

• US 20020085143A1
• Filed: 06/27/2001
• Published: 07/04/2002
• Est. Priority Date: 12/29/2000
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Philips LCD Company Limited (LG Display Co., Ltd.)
• Inventors: Kim, Jeong Hyun, Seo, Hyun Sik
• Granted Patent: US 7,248,309 B2
• Time in Patent Office: Days
• US Class Current: 349/61
• 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) comprising:

a first substrate and a second substrate;

a light emitting layer formed on an outer surface of the first substrate;

a thin film transistor (TFT) array including thin film transistors and pixel electrodes on a surface of the first substrate;

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

a liquid crystal layer interposed between the first substrate and the second substrate.

2. The LCD of claim 1, wherein the first substrate and the second substrate perform an additional function of polarization.

3. The LCD of claim 1, wherein the first substrate and the second substrate are composed of an organic material.

4. The LCD of claim 3, wherein the organic material is any one of polycarbonate, polyimide, polyethersulphone (PES), polyacrylate (PAR), polyethylenenaphthelate (PEN), or polyethyleneterephehalate (PET).

5. A liquid crystal display (LCD) comprising:

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 over an entire surface of the organic light emitting element;

a thin film transistor (TFT) array including thin film transistors and pixel electrodes on a surface of the first substrate;

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

a liquid crystal layer formed between the first substrate and the second substrate.

6. The LCD of claim 5, wherein the organic light emitting element comprises a first electrode, an organic light emitting layer, and a second electrode.

7. The LCD of claim 5, wherein the first substrate and the second substrate perform a polarization function.

8. The LCD of claim 5, wherein the first substrate and the second substrate are composed of an organic material.

9. The LCD of claim 5, further comprising color filter layers between the second substrate and the common electrode.

10. The LCD of claim 8, wherein the organic material is any one of polycarbonate, polyimide, polyethersulphone (PES), polyacrylate (PAR), polyethylenenaphthelate (PEN), or polyethyleneterephehalate (PET).

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

forming a light emitting layer on an outer surface of a first substrate;

forming a thin film transistor (TFT) array including thin film transistors and a pixel electrode on a surface of the first substrate; and

forming a liquid crystal layer between the first substrate and a second substrate.

12. The method of claim 11, wherein forming the light emitting layer comprises:

forming a first insulating layer on the outer surface of the first substrate;

forming an organic light emitting element on the first insulating layer; and

forming a second insulating layer on the organic light emitting element.

13. The method of claim 12, wherein forming the organic light emitting element comprises:

forming a first electrode on the first insulating layer;

forming a hole transport layer, an organic light emitting layer, and an electron transport layer on the first electrode in order; and

forming a second electrode on the electron transport layer.

14. The method of claim 11, wherein the first substrate and the second substrate are composed of an organic material.

15. The method of claim 11, further comprising forming black matrices, color filter layers, and a common electrode on a surface of the second substrate.

17. The method of claim 16, further comprising forming black matrices, color filter layers, and a common electrode on a surface of the second substrate.

18. The method of claim 16, wherein forming the light emitting layer comprises:

forming a first insulating layer on the outer surface of the first substrate;

forming an organic light emitting element on the first insulating layer; and

forming a second insulating layer on the organic light emitting element.

19. The method of claim 18, wherein forming the organic light emitting element comprises:

forming a first electrode on the first insulating layer;

forming a hole transport layer, an organic light emitting layer, and an electron transport layer on the first electrode in order; and

forming a second electrode on the electron transport layer.

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

forming a thin film transistor (TFT) array including thin film transistors and pixel electrodes on a surface of a first substrate;

forming a light emitting layer on an outer surface of the first substrate; and

forming a liquid crystal layer between the first substrate and a second substrate.

20. A method for fabricating a liquid crystal display (LCD):

forming a thin film transistor (TFT) array including thin film transistors and pixel electrodes on a surface of a first substrate; and

forming a light emitting layer on an outer surface of the first substrate.

21. The method of claim 20, further comprising forming black matrices, color filter layers, and a common electrode on a surface of a second substrate.

22. A liquid crystal display (LCD), comprising:

a first substrate having a surface and an outer surface and a light emitting structure fabricated on the outer surface thereof;

a second substrate confronting and spaced apart from the surface of the first substrate; and

a liquid crystal material interposed between the first substrate and the second substrate.

23. The LCD of claim 22, wherein the light emitting structure is a light emitting diode.

24. The LCD of claim 22, wherein the light emitting structure comprises:

a first insulating layer disposed on the outer surface of the first substrate;

a first electrode disposed on the first insulating layer;

an organic film layer disposed on the first electrode; and

a second electrode disposed on the organic film layer.

25. The LCD of claim 24, wherein the organic film layer comprises:

a hole transport layer;

an organic light emitting layer; and

an electron transport layer.

26. The LCD of claim 24, wherein the organic light emitting layer comprises any one of Alq3 (tris-8-hydroxyquinolinato aluminum), BeBq (bis-benzo-quinolinato-berellium), PPV (polyphenylenevinylene) or polyalkylthiphene.

27. The LCD of claim 24, wherein the first electrode is indium tin oxide.

28. The LCD of claim 22, further comprising thin film transistors disposed on the surface of the first substrate.

29. The LCD of claim 22, wherein the first substrate and the second substrate are composed of an organic material.

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

forming a light emitting structure on an outer surface of a first substrate;

bonding the first substrate to a second substrate such that a surface of the first substrate is spaced apart from and confronts the second substrate; and

disposing a liquid crystal layer between the first substrate and a second substrate.

31. The method of claim 30, wherein forming the light emitting structure comprises fabricating a light emitting diode.

32. The method of claim 30, wherein the forming the light emitting structure comprises:

forming a first insulating layer on the outer surface of the first substrate;

forming a first electrode on the first insulating layer;

forming an organic film layer on the first electrode; and

forming a second electrode on the organic film layer.

33. The method of claim 32, wherein forming the organic film layer comprises:

forming a hole transport layer;

forming an organic light emitting layer; and

forming an electron transport layer.

34. The method of claim 32, wherein the organic light emitting layer comprises any one of Alq3 (tris-8-hydroxyquinolinato aluminum), BeBq (bis-benzo-quinolinato-berellium), PPV (polyphenylenevinylene) or polyalkylthiphene.

35. The method of claim 32, wherein the first electrode is indium tin oxide.

36. The method of claim 30, further comprising forming a thin film transistor (TFT) array including thin film transistors and pixel electrodes on the surface of the first substrate.

37. The method of claim 30, wherein the first substrate and the second substrate are comprised of an organic material.