Display panel and display device

Patent metadata

Field	Value
Publication number	US-10139670-B2
Application number	US-201514912858-A
Country	US
Kind code	B2
Filing date	Aug 6, 2015
Priority date	Apr 1, 2015
Publication date	Nov 27, 2018
Grant date	Nov 27, 2018

Abstract

The embodiment of the present invention provides a display panel, which belongs to the field of display technology. The display panel comprises: a first polarizing layer, a display substrate, a second polarizing layer and a phase difference film; wherein the first polarizing layer is arranged at one side of the display substrate, and the first polarizing layer is arranged between the second polarizing layer and the display substrate, a transmission axis direction of the first polarizing layer and a transmission axis direction of the second polarizing layer are perpendicular to each other; the phase difference film is arranged between the first polarizing layer and the second polarizing layer. The present invention arranges a second polarizing layer and a phase difference film on the basis of the existing display panel, such that only the linearly polarized light whose polarizing direction is parallel to the transmission axis direction of the second polarizing layer can be emitted from the display panel, hence, the user whose viewing angle is perpendicular to the display panel can see the content in the display panel, while the user whose viewing angle is in other directions cannot see the contents in the display panel, thereby protecting the user's privacy effectively.

First claim

The invention claimed is:

1. A display panel comprising an optical structure for narrow viewing angle and a display substrate for displaying an image,
wherein the optical structure for narrow viewing angle comprises a first polarizing layer, a second polarizing layer and a phase difference film, so as to achieve a narrow viewing angle mode for the display panel;
wherein the first polarizing layer is arranged at one side of the display substrate, and the first polarizing layer is arranged between the second polarizing layer and the display substrate, a transmission axis direction of the first polarizing layer and a transmission axis direction of the second polarizing layer are perpendicular to each other;
the phase difference film is arranged between the first polarizing layer and the second polarizing layer, for changing a polarizing direction of light incident on the phase difference film, the phase difference film including one of a quarter wave plate and a half wave plate,
wherein the optical structure for narrow viewing angle is free of liquid crystal layer, and the display substrate is free of polarizer.

2. The display panel according to claim 1 , wherein the display panel is a liquid crystal display substrate, a display mode of the liquid crystal display substrate is an Advanced Super Dimension Switch (ADS) mode or a Twisted Nematic (TN) mode.

3. The display panel according to claim 2 , further comprising a third polarizing layer;
wherein the first polarizing layer is arranged at a light exit side of the display substrate, the second polarizing layer is arranged at a light exit side of the first polarizing layer;
the third polarizing layer is arranged at a light entrance side of the display substrate, a transmission axis direction of the third polarizing layer and the transmission axis direction of the first polarizing layer are perpendicular to each other.

4. The display panel according to claim 2 , further comprising a third polarizing layer;
wherein the first polarizing layer is arranged at a light entrance side of the display substrate, the second polarizing layer is arranged at a light entrance side of the first polarizing layer;
the third polarizing layer is arranged at a light exit side of the display substrate, a transmission axis direction of the third polarizing layer and the transmission axis direction of the first polarizing layer are perpendicular with each other.

5. The display panel according to claim 1 , wherein the display panel is an organic light emitting diode (OLED) display substrate.

6. The display panel according to claim 5 , wherein the first polarizing layer is arranged at a light exit side of the display substrate, the second polarizing layer is arranged at a light exit side of the first polarizing layer.

7. The display panel according to claim 3 , further comprising an optical substrate;
wherein the optical substrate is arranged at a light exit side of the second polarizing layer or arranged between the light exit side of the first polarizing layer and the phase difference film.

8. The display panel according to claim 4 , further comprising an optical substrate;
wherein the optical substrate is arranged at a light exit side of the third polarizing layer.

9. The display panel according to claim 7 , wherein the optical substrate is a touch plate or protective glass.

10. The display panel according to claim 1 , wherein the phase difference film is a uniaxial phase difference film.

11. The display panel according to claim 1 , wherein the phase difference film is directly adjacent to each of the first polarizing layer and the second polarizing layer.

12. A display device comprising a display panel according to claim 1 .

13. The display panel according to claim 6 , further comprising an optical substrate;
wherein the optical substrate is arranged at a light exit side of the second polarizing layer or arranged between the light exit side of the first polarizing layer and the phase difference film.

14. The display panel according to claim 8 , wherein the optical substrate is a touch plate or protective glass.

15. The display device according to claim 12 , wherein the display panel is a liquid crystal display substrate, a display mode of the liquid crystal display substrate is an Advanced Super Dimension Switch (ADS) mode or a Twisted Nematic (TN) mode.

16. The display device according to claim 15 , further comprising a third polarizing layer;
wherein the first polarizing layer is arranged at a light exit side of the display substrate, the second polarizing layer is arranged at a light exit side of the first polarizing layer;
the third polarizing layer is arranged at a light entrance side of the display substrate, a transmission axis direction of the third polarizing layer and the transmission axis direction of the first polarizing layer are perpendicular to each other.

17. The display device according to claim 15 , further comprising a third polarizing layer;
wherein the first polarizing layer is arranged at a light entrance side of the display substrate, the second polarizing layer is arranged at a light entrance side of the first polarizing layer;
the third polarizing layer is arranged at a light exit side of the display substrate, a transmission axis direction of the third polarizing layer and the transmission axis direction of the first polarizing layer are perpendicular with each other.

18. The display device according to claim 12 , wherein the display panel is an organic light emitting diode (OLED) display substrate.

19. The display device according to claim 18 , wherein the first polarizing layer is arranged at a light exit side of the display substrate, the second polarizing layer is arranged at a light exit side of the first polarizing layer.

20. The display device according to claim 16 , further comprising an optical substrate;
wherein the optical substrate is arranged at a light exit side of the second polarizing layer or arranged between the light exit side of the first polarizing layer and the phase difference film.

Assignees

• Boe Technology Group Co Ltd
• Hefei Boe Optoelectronics Tech

Inventors

• Park Kuhyun

Classifications

• G02F1/133308

  Support structures for LCD panels, e.g. frames or bezels · CPC title

• G02F1/13338

  Input devices, e.g. touch panels · CPC title

• G02F2413/01

  Number of plates being 1 · CPC title

• H01L51/5281

  Electricity · mapped topic

• G02F1/133528 Primary

  Polarisers · CPC title