STEREOSCOPIC IMAGE DISPLAY DEVICE, MOTHER SUBSTRATE FOR STEREOSCOPIC IMAGE DISPLAY DEVICE AND FABRICATING METHOD THE MOTHER SUBSTRATE

• US 20110242442A1
• Filed: 03/31/2011
• Published: 10/06/2011
• Est. Priority Date: 04/02/2010
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Lee, Jaeho, Lee, Bonggeum
• Granted Patent: US 8,665,383 B2
• Time in Patent Office: Days
• US Class Current: 349/15
• CPC Class Codes: G02B 30/25 using polarisation techniques
• CPC Class Codes: G02B 30/27 involving lenticular arrays
• CPC Class Codes: G02B 30/31 involving active parallax barriers involving directional light or back-light sources G02B30/33

Abstract

A stereoscopic image display device includes a pixel array cell provided with a plurality of pixels used to display 2D and 3D images, a switchable optical layer opposite to the pixel array cell, and a transparent both-sided adhesive film joining the pixel array cell to the switchable optical layer between the pixel array cell and the switchable optical layer.

Claims

1. A stereoscopic image display device comprising:

a pixel array cell provided with a plurality of pixels used to display 2D and 3D images;

a switchable optical layer opposite to the pixel array cell; and

a transparent both-sided adhesive film joining the pixel array cell to the switchable optical layer between the pixel array cell and the switchable optical layer.

2. The stereoscopic image display device of claim 1, wherein the switchable optical layer:

transmits light emitted from the pixel array cell as it is using liquid crystals in the 2D image; and

enables light for a left eye image emitted from the pixel array cell to travel toward the left eye of a user and light for a right eye image emitted from the pixel array cell to travel toward the right eye of the user using the liquid crystals in the 3D image.

3. The stereoscopic image display device of claim 1, wherein the switchable optical layer includes:

a first transparent substrate;

a second transparent substrate opposite to the first transparent substrate;

a common electrode formed on the second transparent substrate;

divided electrodes formed on the first transparent substrate; and

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

4. The stereoscopic image display device of claim 3, wherein the thickness of each of the first and second transparent substrates is about 20 μ

m to about 500 μ

m.

5. The stereoscopic image display device of claim 1, wherein the pixel array cell is implemented by organic light emitting diode elements.

6. A stereoscopic image display device mother substrate comprising:

a pixel array cell mother substrate provided with first alignment keys and including at least one pixel array cell which is provided with a plurality of pixel used to display 2D and 3D images;

a switchable optical layer mother substrate provided with second alignment keys and including at least one switchable optical layer opposite to the pixel array cell; and

a transparent both-sided adhesive film joining the pixel array cell to the switchable optical layer between the pixel array cell mother substrate and the switchable optical layer mother substrate.

7. The stereoscopic image display device mother substrate of claim 6, wherein the transparent both-sided adhesive film includes:

a film base;

a first adhesive layer formed on one surface of the film base;

a second adhesive layer formed on the other surface of the film base;

a first protective film covering the first adhesive layer to protect the first adhesive layer; and

a second protective film covering the second adhesive layer to protect the second adhesive layer.

8. The stereoscopic image display device mother substrate of claim 7, wherein the first adhesive layer faces the switchable optical layer and has substantially the same size as the switchable optical layer, and

the second adhesive layer faces the pixel array cell and has substantially the same size as the pixel array cell.

9. The stereoscopic image display device mother substrate of claim 8, wherein the transparent both-sided adhesive film includes third alignment keys.

10. The stereoscopic image display device mother substrate of claim 6, wherein the switchable optical layer mother substrate includes first and second mother substrates opposite to each other, and

wherein electrodes are formed in a cell region of each of the first and second mother substrates corresponding to the pixel array cell, and a liquid crystal layer is formed in the cell region between the first and second mother substrates.

11. The stereoscopic image display device mother substrate of claim 10, wherein

the thickness of each of the first and second substrates is about 20 μ

m to about 500 μ

m.

12. The stereoscopic image display device mother substrate of claim 6, wherein the pixel array cell is implemented by organic light emitting diode elements.

13. A method of manufacturing a stereoscopic image display device mother substrate comprising:

a first step of forming a pixel array cell mother substrate provided with first alignment keys and including at least one pixel array cell which is provided with a plurality of pixel used to display 2D and 3D images;

a second step of forming a switchable optical layer mother substrate provided with second alignment keys and including at least one switchable optical layer opposite to the pixel array cell;

a third step of forming a transparent both-sided adhesive film joining the pixel array cell to the switchable optical layer between the pixel array cell mother substrate and the switchable optical layer mother substrate;

a fourth step of joining a first adhesive layer of the transparent both-sided adhesive film to the switchable optical layer mother substrate; and

a fifth step of aligning the pixel array cell mother substrate and the switchable optical layer mother substrate with each other using the first and second alignment keys and joining a second adhesive layer of the transparent both-sided adhesive film to the pixel array cell mother substrate.

14. The method of claim 13, wherein the transparent both-sided adhesive film includes third alignment keys.

15. The method of claim 13, wherein the fourth step includes:

peeling a first protective film of the first adhesive layer of the transparent both-sided adhesive film; and

joining the transparent both-sided adhesive film to the switchable optical layer mother substrate by attaching the first adhesive layer to the switchable optical layer.

16. The method of claim 13, wherein the fifth step includes:

peeling a second protective film of the second adhesive layer of the transparent both-sided adhesive film; and

joining the pixel array cell mother substrate to the switchable optical layer mother substrate by attaching the second adhesive layer to the pixel array cell.

17. The method of claim 13, wherein the fourth step and the fifth step are performed at temperature of about 70°

C. to about 150°

C.

18. The method of claim 13, wherein the switchable optical layer mother substrate includes first and second mother substrates opposite to each other,

wherein electrodes are formed in a cell region of each of the first and second mother substrates corresponding to the pixel array cell, and a liquid crystal layer is formed in the cell region between the first and second mother substrates.

19. The method of claim 18, wherein in the second step, each of the first and second substrates is etched to have the thickness of about 20 μ

m to about 500 μ

m.

20. The method of claim 13, wherein the joined mother substrates are cut along the pixel array cell and the switchable optical layer.