Stereoscopic image display device using pattern retarder method and method for fabricating the same

Patent metadata

Field	Value
Publication number	US-9709812-B2
Application number	US-201113330923-A
Country	US
Kind code	B2
Filing date	Dec 20, 2011
Priority date	May 17, 2011
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

Embodiments of the invention relate to a stereoscopic image display device using a pattern retarder method, which offers an increased vertical viewing angle and a method for fabricating the same. The stereoscopic image display device comprises: a display panel including data lines, gate lines crossing the data lines, and a plurality of pixels formed in cell areas defined by the crossings of the data lines and the gate lines; and a pattern retarder including a first retarder for passing only left circularly polarized light therethrough and a second retarder for passing only right circularly polarized light therethrough, wherein a plurality of air holes are formed in a first plane of a first substrate of the display panel, and the long axis direction of the air holes is the same as the long axis direction of the first retarder and the second retarder.

First claim

What is claimed is:

1. A stereoscopic image display device comprising:
a display panel including data lines, gate lines crossing the data lines, and a plurality of pixels of odd lines and even lines are formed in cell areas defined by the crossings of the data lines and the gate lines;
a pattern retarder including a first retarder for passing only left circularly polarized light therethrough and a second retarder for passing only right circularly polarized light therethrough, the first retarder and the second retarder extending in a long axis direction; and
a first polarizing plate,
wherein the display panel further includes:
a first substrate having a first plane attached to the first polarizing plate and a second plane opposite the first plane,
a plurality of air holes formed into the first plane of the first substrate, and
a black matrix formed between the pixels of odd lines and the pixels of even lines, and disposed on the second plane of the first substrate,

wherein the air holes extend across the first plane of the first substrate in the same long axis direction as the first retarder and the second retarder,
wherein the air holes are formed to face the boundary line between the first retarder and the second retarder, and
wherein the air holes align with the black matrix.

2. The stereoscopic image display device of claim 1 , wherein the pixels of the odd lines align with the first retarder, and the pixels of the even lines align with the second retarder.

3. The stereoscopic image display device of claim 1 , wherein the length of the air holes in a short axis direction perpendicular to the long axis direction is 0.01 to 1.1 times of the length of the black matrix in the short axis direction.

4. The stereoscopic image display device of claim 1 , wherein the center of at least one of the air holes in the short axis direction overlaps with the black matrix.

5. The stereoscopic image display device of claim 1 , wherein the air holes have a shape of a trench,
wherein, in a cross section of the trench, the angle between a first line which connects C 1 point and C 2 point and a second line which connects the C 2 point and a point p is less than or equal to 30°, wherein the C 1 point is a center point along the length of the trench in a short axis direction perpendicular to the long axis direction at the opening of the trench, the C 2 point is a center point along the length of the trench in the short axis direction at the bottom of the trench, the point p is an end point along the length of the trench in the short axis direction at the opening of the trench.

6. The stereoscopic image display device of claim 5 , wherein the trench has a rectangular shape.

7. The stereoscopic image display device of claim 1 , wherein the first polarizing plate is located between the first plane of the first substrate and the pattern retarder.

8. The stereoscopic image display device of claim 1 , wherein the display panel further includes an odd line color filter and an even line color filter each disposed on the second plane of the first substrate, the odd line color filter facing the pixels of the odd lines and the even line color filter facing the pixels of the even lines.

9. The stereoscopic image display device of claim 1 , wherein the display panel further includes:
a second substrate having a first plane and a second plane; and
a liquid crystal layer between the second plane of the first substrate and the first plane of the second substrate.

10. The stereoscopic image display device of claim 9 , further comprising a second polarizing plate attached to the second plane of the second substrate.

11. The stereoscopic image display device of claim 1 , wherein the depth of the air holes is greater than 0.01 times the thickness of the first substrate and less than the thickness of the first substrate.

12. The stereoscopic image display device of claim 1 , wherein the air holes are sealed by the first polarizing plate.

13. The stereoscopic image display device of claim 1 , wherein the black matrix is disposed directly on the second plane of the first substrate.

14. A method for fabricating a stereoscopic image display device, the stereoscopic image display device comprising: a display panel including data lines, gate lines crossing the data lines, and a plurality of pixels formed in cell areas defined by the crossings of the data lines and the gate lines, the display panel further including a first substrate having a first plane and a second plane opposite the first plane; and a pattern retarder including a first retarder for passing only left circularly polarized light therethrough and a second retarder for passing only right circularly polarized light therethrough, the method comprising:
forming a plurality of air holes into the first plane of the first substrate of the display panel;
forming a black matrix on the second plane of the first substrate;
attaching a first polarizing plate onto the first plane; and
attaching the pattern retarder onto the first polarizing plate,
wherein the air holes extend across the first plane of the first substrate in a same long axis direction in which the first retarder and the second retarder extend, and
wherein the air holes are formed to face the boundary line between the first retarder and the second retarder.

15. The method of claim 14 , wherein, in the forming of a plurality of air holes in a first plane of a first substrate of the display panel, the air holes are formed by scribing using an infrared ray laser.

16. The method of claim 14 , wherein, in the forming of a plurality of air holes in a first plane of a first substrate of the display panel, the air holes are formed by scribing using a diamond bite.

17. The method of claim 14 , wherein, in the forming of a plurality of air holes in a first plane of a first substrate of the display panel, the air holes are formed by pressing a mold patterned with the air holes onto the first plane of the melted first substrate and cooling the same.

18. The method of claim 14 , wherein the attaching of the first polarizing plate onto the first plane includes sealing the air holes with the first polarizing plate.

19. The method of claim 14 , the forming of the black matrix includes forming the black matrix directly on the second plane of the first substrate.

Assignees

• Park Jaehyun
• Lg Display Co Ltd

Inventors

• Park Jaehyun

Classifications

• H04N2213/001

  Constructional or mechanical details · CPC title

• Y10T156/1064

  Partial cutting [e.g., grooving or incising] · CPC title

• H04N13/00

  Stereoscopic video systems; Multi-view video systems; Details thereof · CPC title

• G02B30/27 Primary

  involving lenticular arrays · CPC title

• Y10T156/10

  Methods of surface bonding and/or assembly therefor · CPC title