DISPLAY DEVICE SWITCHABLE BETWEEN TWO-DIMENSIONAL DISPLAY MODE AND THREE-DIMENSIONAL DISPLAY MODE

• US 20160274370A1
• Filed: 11/15/2013
• Published: 09/22/2016
• Est. Priority Date: 08/09/2013
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: WU, Yanbing
• Granted Patent: US 9,529,204 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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
• CPC Class Codes: G02F 2201/44 Arrangements combining different electro-active layers, e.g. electrochromic, liquid crystal or electroluminescent layers
• CPC Class Codes: H04N 13/31 using parallax barriers
• CPC Class Codes: H04N 13/312 the parallax barriers being placed behind the display panel, e.g. between backlight and spatial light modulator [SLM]
• CPC Class Codes: H04N 13/356 having separate monoscopic and stereoscopic modes
• CPC Class Codes: H04N 13/359 Switching between monoscopic and stereoscopic modes
• CPC Class Codes: H05B 33/28 of translucent electrodes

Abstract

This disclosure discloses a display device switchable between a 2D display mode and a 3D display mode, wherein a parallax barrier is disposed between a first polarizer and a backlight to implement glassless-type 3D display. A first transparent electrode, an electroluminescent layer, and a second transparent electrode are sequentially disposed between the first polarizer and the parallax barrier, the first transparent electrode and/or the second transparent electrode at least having a pattern corresponding to opaque stripes of a slit light source. Switchover between the 2D display mode and the 3D display mode may be implemented by controlling whether or not to apply a voltage to the electroluminescent layer. The switchover between a 2D display mode and a 3D display mode may be implemented only by adding an electroluminescent layer, and the thickness of the display device is not increased.

Claims

1. A display device, which is switchable between a two-dimensional display mode and a three-dimensional display mode, comprising a display panel and a backlight, wherein the display panel comprises a first polarizer disposed on a side, close to the backlight, of the display panel;

and a second polarizer disposed on a side, away from the backlight, of the display panel;

wherein a parallax barrier is disposed between the first polarizer and the backlight;

wherein a first transparent electrode, an electroluminescent layer, and a second transparent electrode are sequentially disposed between the first polarizer and the parallax barrier, the first transparent electrode and/or the second transparent electrode at least having a pattern corresponding to opaque stripes of the parallax barrier; and

wherein, in the two-dimensional display mode, the electroluminescent layer corresponding to the pattern stays in a luminescent state; and

in the three-dimensional display mode, the electroluminescent layer corresponding to the pattern stays in a light-transmitting state.

2. The display device according to claim 1, wherein the first transparent electrode, the electroluminescent layer, the second transparent electrode, and the parallax barrier are sequentially formed on the surface of a side, close to the backlight, of the first polarizer.

3. The display device according to claim 1, further comprising a first transparent substrate disposed between the first polarizer and the backlight;

and

wherein the parallax barrier is formed on the surface of a side, close to the first polarizer, of the first transparent substrate.

4. The display device according to claim 3, wherein the first transparent electrode, the electroluminescent layer, and the second transparent electrode are sequentially formed on the surface of a side, close to the backlight, of the first polarizer.

5. The display device according to claim 4, wherein the first transparent substrate is fixedly coupled to the first polarizer.

6. The display device according to claim 3, further comprising a second transparent substrate disposed between the first polarizer and the parallax barrier;

and

wherein the first transparent electrode, the electroluminescent layer, and the second transparent electrode are sequentially formed on the surface of a side, close to the parallax barrier, of the second transparent substrate.

7. The display device according to claim 6, wherein the second transparent substrate is fixedly coupled to the first transparent substrate.

8. The display device according to claim 6, wherein the second transparent substrate is fixedly coupled to the first polarizer.

9. The display device according to claim 1, wherein light emitted by the electroluminescent layer and light emitted by the backlight have the same intensity and color.

10. The display device according to claim 1, wherein the parallax barrier is disposed as attaching to the electroluminescent layer.

11. The display device according to claim 1, wherein the electroluminescent layer, when staying in the light-transmitting state, has a transmittance over 92%.

12. The display device according to claim 1, wherein the opaque stripes of the parallax barrier have a transmittance below 8%.

13. The display device according to claim 1, wherein a slit grating structure of the parallax barrier comprises black-white stripes spaced apart.

14. The display device according to claim 13, wherein the black stripes are manufactured by using black resins or black metals.

15. A method, which causes a display device comprising a display panel and a backlight switchable between a two-dimensional display mode and a three-dimensional display mode, wherein the display panel comprises a first polarizer disposed on a side, close to the backlight, of the display panel;

and a second polarizer disposed on a side, away from the backlight, of the display panel;

wherein a parallax barrier is disposed between the first polarizer and the backlight;

wherein a first transparent electrode, an electroluminescent layer, and a second transparent electrode are sequentially disposed between the first polarizer and the parallax barrier, the first transparent electrode and/or the second transparent electrode at least having a pattern corresponding to opaque stripes of the parallax barrier; and

the method comprising;

configuring, in the two-dimensional display mode, the electroluminescent layer corresponding to the pattern to be in a luminescent state; and

configuring, in the three-dimensional display mode, the electroluminescent layer corresponding to the pattern to be in a light-transmitting state.

16. An electronic product, comprising a display device which is switchable between a two-dimensional display mode and a three-dimensional display mode, wherein the display device comprises a display panel and a backlight, and wherein the display panel comprises a first polarizer disposed on a side, close to the backlight, of the display panel;

and a second polarizer disposed on a side, away from the backlight, of the display panel;

wherein a parallax barrier is disposed between the first polarizer and the backlight;

wherein a first transparent electrode, an electroluminescent layer, and a second transparent electrode are sequentially disposed between the first polarizer and the parallax barrier, the first transparent electrode and/or the second transparent electrode at least having a pattern corresponding to opaque stripes of the parallax barrier; and

wherein, in the two-dimensional display mode, the electroluminescent layer corresponding to the pattern stays in a luminescent state; and

in the three-dimensional display mode, the electroluminescent layer corresponding to the pattern stays in a light-transmitting state.

17. The electronic product according to claim 16, wherein the first transparent electrode, the electroluminescent layer, the second transparent electrode, and the parallax barrier are sequentially formed on the surface of a side, close to the backlight, of the first polarizer.

18. The electronic product according to claim 16, further comprising a first transparent substrate disposed between the first polarizer and the backlight;

and

wherein the parallax barrier is formed on the surface of a side, close to the first polarizer, of the first transparent substrate.

19. The electronic product according to claim 18, wherein the first transparent electrode, the electroluminescent layer, and the second transparent electrode are sequentially formed on the surface of a side, close to the backlight, of the first polarizer.

20. The electronic product according to claim 19, wherein the first transparent substrate is fixedly coupled to the first polarizer.