Stereoscopic image display device and method for manufacturing the same

• US 9,354,453 B2
• Filed: 08/22/2012
• Issued: 05/31/2016
• Est. Priority Date: 03/06/2012
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Jun, Woo-Yeal, Ko, Sung-Kon, Kim, Kyung-Soon, Lee, Young-Hee
• Primary Examiner(s): Patel, Kumar
• Assistant Examiner(s): Ahn, Sejoon
• Application Number:
  US13/591,358
• Publication Number:
  US 20130234916A1
• Time in Patent Office: 1,378 Days
• US Class Current: 1/1
• CPC Class Codes: G02B 30/25 using polarisation techniques
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133631 with a spatial distribution of the retardation value
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]

Abstract

The display device includes a display panel including upper and lower array substrates, and a patterned retarder to separate an image displayed on the display panel into left-eye and right-eye images, wherein the lower array substrate includes gate and data lines to define pixel areas, a pixel electrode formed at each pixel area, and a black stripe formed at a boundary between the pixel areas to display the left-eye image and the pixel areas to display the right-eye image, wherein the black stripe includes a first black stripe formed on the same layer and formed of the same material as an opaque layer of a thin film transistor, and a second black stripe overlapped with the first black stripe and formed on the same layer and formed of the same material as the pixel electrode.

Claims

1. A stereoscopic image display device comprising:

a display panel configured to selectively form a 2-Dimensional (2D) image and a 3-Dimensional (3D) image, the display panel including a lower array substrate in which a color filter and a thin film transistor are on the same substrate, and an upper array substrate arranged to face the lower array substrate; and

a patterned retarder to separate an image displayed on the display panel into a left-eye image and a right-eye image upon formation of the 3D image,

wherein the lower array substrate includes;

a gate line and a data line connected to the thin film transistor and intersected each other to define pixel areas;

a pixel electrode connected to the thin film transistor and located at each pixel area; and

a black stripe at a boundary between a pixel area corresponding to the left-eye image and a pixel area corresponding to the right-eye image, and

wherein the black stripe includes;

a first black stripe on the same layer as and of the same material as an opaque layer included in the thin film transistor; and

a second black stripe overlapping the first black stripe, the second black stripe being on the same layer as and of the same material as the pixel electrode,

wherein the first black stripe has a plate shape at upper and lower sides of each pixel area except for a region having the color filter, and is on the same layer as and of the same material as a gate electrode of the thin film transistor, and

wherein the second black stripe has a plate shape at a region where the second black stripe is overlapped with the first black stripe.

2. The device according to claim 1, further comprising a common electrode to form a horizontal electric field with the pixel electrode,

wherein the common electrode is on the same layer as and of the same material as the second black stripe, and is connected to the second black stripe.

3. The device according to claim 1, wherein the second black stripe has a plurality of openings spaced apart from one another, and the plurality of openings is at a region where the second black stripe is overlapped with the first black stripe.

4. The device according to claim 1, wherein the second black stripe has a single opening at a region where the second black stripe overlapped with the first black stripe.

5. The device according to claim 1,

wherein the patterned retarder includes a first retarder configured to transmit a first polarized light component and a second retarder configured to transmit a second polarized light component, the first and second retarders being alternately arranged, and

wherein the black stripe overlaps with a boundary between the first retarder and the second retarder.

10. The device according to claim 1, wherein the second black stripe and the pixel electrode are directly on a protective film.

15. The device according to claim 3, wherein a total area of the plurality of openings is greater than 0% and less than 50%.

16. The device according to claim 4, wherein a total area of the single opening is greater than about 50% and less than 100%.

6. A method for manufacturing a stereoscopic image display device, comprising:

preparing a lower array substrate, wherein the lower array substrate includes a color filter and a thin film transistor at each pixel area on the same substrate, and first and second black stripes at a boundary between neighboring pixel areas;

forming a display panel configured to selectively form a 2D image and a 3D image by bonding the lower array substrate and an upper array substrate to face each other; and

forming a patterned retarder on the display panel, wherein the patterned retarder serves to separate an image displayed on the display panel into a left-eye image and a right-eye image upon formation of the 3D image,

wherein the preparing the lower array substrate includes;

forming the thin film transistor, and simultaneously forming the first black stripe on the same layer as any one opaque metal layer included in the thin film transistor using the same material as the opaque metal layer; and

forming a pixel electrode, connected to the thin film transistor, at each pixel area, and simultaneously forming the second black stripe on the same layer as the pixel electrode using the same material as the pixel electrode, and

wherein the second black stripe is arranged on the same substrate as the first black stripe to overlap with the first black stripe at the boundary between the neighboring pixel areas,

wherein the first black stripe has a plate shape at upper and lower sides of each pixel area except for a region having the color filter, and the first black stripe is on the same layer as and of the same material as a gate electrode of the thin film transistor, and

wherein the second black stripe has a plate shape at a region where the second black stripe is overlapped with the first black stripe.

7. The method according to claim 6, further comprising forming a common electrode on the same layer as the second black stripe using the same material as the second black stripe so as to be connected to the second black stripe, wherein the common electrode forms a horizontal electric field with the pixel electrode.

8. The method according to claim 6, wherein the second black stripe has a plurality of openings spaced apart from one another, and the plurality of openings is at a region where the second black stripe is overlapped with the first black stripe.

9. The method according to claim 6, wherein the second black stripe has a single opening at a region where the second black stripe is overlapped with the first black stripe.

11. The method according to claim 6, wherein the second black stripe and the pixel electrode are directly on a protective film.

17. The method according to claim 8, wherein a total area of the plurality of openings is greater than 0% and less than 50%.

18. The method according to claim 9, wherein a total area of the single opening is greater than about 50% and less than 100%.

12. A stereoscopic image display device comprising:

a display panel configured to selectively form a 2-Dimensional (2D) image and a 3-Dimensional (3D) image, the display panel including a lower array substrate in which a color filter and a thin film transistor are on the same substrate, and an upper array substrate arranged to face the lower array substrate; and

a patterned retarder to separate an image displayed on the display panel into a left-eye image and a right-eye image upon formation of the 3D image,

wherein the lower array substrate includes;

a gate line and a data line connected to the thin film transistor and intersected each other to define pixel areas;

a pixel electrode connected to the thin film transistor and located at each pixel area; and

a black stripe at a boundary between a pixel area corresponding to the left-eye image and a neighboring pixel area corresponding to the right-eye image, and

wherein the black stripe includes;

a first black stripe on the same layer as and of the same material as an opaque layer included in the thin film transistor; and

a second black stripe on the same layer as and of the same material as the pixel electrode, and

wherein the second black stripe is arranged on the same substrate as the first black stripe to overlap with the first black stripe at the boundary,

wherein the first black stripe has a plate shape at upper and lower sides of each pixel area except for a region having the color filter, and the first black stripe is on the same layer as and of the same material as a gate electrode of the thin film transistor, and

wherein the second black stripe has a plate shape at a region where the second black stripe is overlapped with the first black stripe.

13. The device according to claim 12, wherein the second black stripe has a plurality of openings spaced apart from one another, and the plurality of openings is at a region where the second black stripe is overlapped with the first black stripe such that a total area of the plurality of openings is greater than 0% and less than 50%.

14. The device according to claim 12, wherein the second black stripe has a single opening at a region where the second black stripe overlapped with the first black stripe such that a total area of the single opening is greater than about 50% and less than 100%.