Polarizing plate and method for fabricating the same

• US 8,525,961 B2
• Filed: 06/22/2010
• Issued: 09/03/2013
• Est. Priority Date: 07/01/2009
• Status: Active Grant

• Current Assignee: HannStar Display Corporation
• Original Assignee: HannStar Display Corporation
• Inventors: Kang, Mu-Kai, Chen, Wei-Chou, Tseng, Heng-Cheng, Tsai, Cheng-Yeh
• Primary Examiner(s): Vu, Phu
• Application Number:
  US12/820,585
• Publication Number:
  US 20110001903A1
• Time in Patent Office: 1,169 Days
• Field of Search: 349/122
• US Class Current: 349/122
• CPC Class Codes: G02B 30/25 using polarisation techniques
• CPC Class Codes: G02B 30/27 involving lenticular arrays
• CPC Class Codes: G02B 30/30 involving parallax barriers
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133528 Polarisers

Abstract

A polarizing plate is provided. The polarizing plate includes a polarizing layer having a first and a second opposite sides; a parallax barrier layer configured above one of the first and the second sides of the polarizing layer, and a top surface protecting layer configured above the parallax barrier layer.

Claims

1. A polarizing plate, comprising:

a polarizing layer having a first and a second opposite sides;

a parallax barrier layer configured above one of the first and the second sides of the polarizing layer,

a top surface protecting layer configured above the parallax barrier layer;

a first protecting layer configured above the first side of the polarizing layer;

a second protecting layer configured below the second side of the polarizing layer, wherein the first and the second protecting layers are under the top surface protecting layer; and

a compensating film, wherein the polarizing layer, the parallax barrier layer, the first protecting layer and the second protecting layer are configured between the top surface protecting layer and the compensating film.

2. The polarizing plate as claimed in claim 1, further comprising:

a pressure sensitive adherent layer, wherein the polarizing layer, the parallax barrier layer,

the first protecting layer and the second protecting layer are configured between

the top surface protecting layer and the pressure sensitive adherent layer.

3. The polarizing plate as claimed in claim 2, wherein the pressure sensitive adherent layer contacts with a liquid crystal display (LCD) cell.

4. The polarizing plate as claimed in claim 1, wherein each of the first and the second protecting layers has a polymer film with a cellulose series resin.

5. The polarizing plate as claimed in claim 1, wherein each of the first and the 17 second protecting layers has a material being one selected from a group consisting of a triacetyl cellulose, a cyclic olefin copolymer, a cyclic olefin polymer and a combination thereof.

6. The polarizing plate as claimed in claim 1, further comprising:

a first adherent layer configured above the first side of the polarizing layer;

a first protecting layer configured above the first adherent layer and between the parallax barrier layer and the first adherent layer;

a first pressure sensitive adherent layer configured above the parallax barrier layer and below the top surface protecting layer;

a second adherent layer configured below the second side of the polarizing layer;

a second protecting layer configured below the second adherent layer;

a second pressure sensitive adherent layer configured below the second protecting layer; and

a separating film configured below the second pressure sensitive adherent layer.

7. The polarizing plate as claimed in claim 1, wherein the polarizing layer has a polymer film with a polyvinyl alcohol series resin and is configured below the surface protecting layer.

8. The polarizing plate as claimed in claim 1, wherein the polarizing layer has a polyvinyl alcohol.

9. A 3D display device, comprising:

a display cell; and

a compensating film configured above the display cell; and

a polarizing plate configured above the compensating film and having a top surface protecting layer and a parallax barrier layer configured below the 18 top surface protecting layer.

10. The 3D display device as claimed in claim 9, wherein the display cell is one selected from a group consisting of a liquid crystal display (LCD), an electro luminescent (EL) display, a plasma display (PD), a field emission display (FED) and a self light emission display device.

11. A method for fabricating a polarizing a 3D display device having a display cell, comprising steps of:

providing a polarizing layer having a first and a second opposite sides;

forming a parallax barrier layer configured above one of the first and the second sides of the polarizing layer;

providing a top surface protecting layer configured above the parallax barrier layer, wherein the polarizing layer, the barrier layer and the top surface protective layer are integrated into a polarizing plate; and

forming a compensating film to combine the polarizing plate with the display cell.

12. A method as claimed in claim 11, further comprising steps of:

forming a first protecting layer configured below the top surface protecting layer and above the first side of the polarizing layer; and

forming a second protecting layer configured below the top surface protecting layer and below the second side of the polarizing layer.

13. A method as claimed in claim 11, further comprising steps of:

forming a first and a second adherent layers respectively above the first side and below the second side of the polarizing layer;

forming a first protecting layer above the first adherent layer; and

forming a second protecting layer below the second adherent layer.

14. The method as claimed in claim 13, wherein the first and the second adherent layers are coated respectively above the first side and below the second side of the polarizing layer and the polarizing layer is hot-pressed between the 19 first and second protecting layers.

15. The method as claimed in claim 13 further comprising steps of:

providing a separating film;

forming a first press sensitive adherent layer between the first protecting layer and the top surface protecting layer; and

forming a second press sensitive adherent layer between the second protecting layer and the separating film.

16. The method as claimed in claim 15, wherein the first and the second press sensitive adherent layers are formed by a coating process.

17. The method as claimed in claim 11, wherein the parallax barrier layer is formed by an ink jet printing process and a pigment type of ink made of one of opaque colors and deep colors is used in the ink-jet printing process.