Display device and electronic equipment

Patent metadata

Field	Value
Publication number	US-11906839-B2
Application number	US-202016981602-A
Country	US
Kind code	B2
Filing date	Aug 4, 2020
Priority date	Jul 1, 2020
Publication date	Feb 20, 2024
Grant date	Feb 20, 2024

Abstract

The present disclosure provides a display device and an electronic equipment. The display device includes: a display module, the display module having a light emitting side; a phase retarder, the phase retarder is disposed on the light emitting side of the display module; wherein a range of a compensation value of the phase retarder is [λ/16, λ/4), (λ/4, 7λ/16], [9λ/16, 3λ/4) or (3λ/4, 15λ/16], where λ is a wavelength of light emitted by the display module.

First claim

What is claimed is:

1. A display device, comprising:
a display module, the display module having a light emitting side;
a phase retarder, the phase retarder is disposed on the light emitting side of the display module; wherein,
a range of a compensation value of the phase retarder is [λ/16, λ/4), (λ/4, 7λ/16], [9λ/16, 3λ/4) or (3λ/4, 15λ/16], where λ is a wavelength of light emitted by the display module.

2. The display device according to claim 1 , wherein the range of the compensation value of the phase retarder is [λ 1 /16, λ 1 /4), (λ 1 /4, 7λ 1 /16], [9λ 1 /16, 3λ 1 /4), and (3λ 1 /4, 15λ 1 /16)];
the λ 1 is a wavelength of light with the highest brightness from the light emitted by the display module.

3. The display device according to claim 1 , wherein a protective layer is disposed on a surface of the phase retarder away from the display module.

4. The display device according to claim 1 , wherein the phase retarder has a hardened surface, and the hardened surface is a surface of the phase retarder away from the display module.

5. The display device according to claim 1 , wherein the display device is a liquid crystal display device, and the display module includes:
a first polarizer;
a liquid crystal display panel, the liquid crystal display panel being disposed on the first polarizer;
a second polarizer, the second polarizer being disposed on the liquid crystal display panel;
a backlight module, the backlight module being disposed on the second polarizer;
wherein,
the phase retarder is disposed on a side of the first polarizer away from the liquid crystal display panel.

6. The display device according to claim 5 , wherein the display device further includes an adhesive layer, and the phase retarder is attached to a surface of the first polarizer away from the liquid crystal display panel by the adhesive layer.

7. The display device according to claim 5 , wherein an included angle between a slow axis of the phase retarder and a transmission axis of the first polarizer is 45 degrees or 135 degrees.

8. The display device according to claim 7 , wherein an included angle between the transmission axis of the first polarizer and a horizontal center line of the liquid crystal display panel is 45 degrees or 135 degrees; an included angle between the phase retarder and the horizontal center line of the liquid crystal display panel is 90 degrees or 180 degrees.

9. The display device according to claim 7 , wherein an included angle between the transmission axis of the first polarizer and a horizontal center line of the liquid crystal display panel is 0 degrees or 90 degrees; an included angle between the phase retarder and the horizontal center line of the liquid crystal display panel is 45 degrees or 135 degrees.

10. The display device according to claim 1 , wherein the display module includes:
an OLED display panel;
a third polarizer, the third polarizer being disposed on the OLED display panel;
wherein,
the phase retarder is disposed on a side of the third polarizer away from the OLED display panel.

11. The display device according to claim 1 , wherein the phase retarder is a wave plate or a birefringent film.

12. An electronic equipment, comprising a display device, the display device comprising:
a display module, the display module having a light emitting side;
a phase retarder, the phase retarder is disposed on the light emitting side of the display module; wherein,
a range of a compensation value of the phase retarder is [λ/16, λ/4), (λ/4, 7λ/16], [9λ/16, 3λ/4) or (3λ/4, 15λ/16], where λ is a wavelength of light emitted by the display module.

13. The electronic equipment according to claim 12 , the range of the compensation value of the phase retarder is [λ 1 /16, λ 1 /4), (λ 1 /4, 7λ 1 /16], [9λ 1 /16, 3λ 1 /4), and (3λ 1 /4, 15λ 1 /16)];
the λ 1 is a wavelength of light with the highest brightness from the light emitted by the display module.

14. The electronic equipment according to claim 12 , wherein the phase retarder has a hardened surface, and the hardened surface is a surface of the phase retarder away from the display module.

15. The electronic equipment according to claim 12 , wherein the display device is a liquid crystal display device, and the display module includes:
a first polarizer;
a liquid crystal display panel, the liquid crystal display panel being disposed on the first polarizer;
a second polarizer, the second polarizer being disposed on the liquid crystal display panel;
a backlight module, the backlight module being disposed on the second polarizer;
wherein,
the phase retarder is disposed on a side of the first polarizer away from the liquid crystal display panel.

16. The electronic equipment according to claim 15 , wherein the display device further includes an adhesive layer, and the phase retarder is attached to a surface of the first polarizer away from the liquid crystal display panel by the adhesive layer.

17. The electronic equipment according to claim 15 , wherein an included angle between a slow axis of the phase retarder and a transmission axis of the first polarizer is 45 degrees or 135 degrees.

18. The electronic equipment according to claim 17 , wherein an included angle between the transmission axis of the first polarizer and a horizontal center line of the liquid crystal display panel is 45 degrees or 135 degrees; an included angle between the phase retarder and the horizontal center line of the liquid crystal display panel is 90 degrees or 180 degrees.

19. The electronic equipment according to claim 17 , wherein an included angle between the transmission axis of the first polarizer and a horizontal center line of the liquid crystal display panel is 0 degrees or 90 degrees; an included angle between the phase retarder and the horizontal center line of the liquid crystal display panel is 45 degrees or 135 degrees.

20. The electronic equipment according to claim 12 , wherein the display module includes:
an OLED display panel;
a third polarizer, the third polarizer being disposed on the OLED display panel;
wherein,
the phase retarder is disposed on a side of the third polarizer away from the OLED display panel.

Assignees

• Huizhou China Star Optoelectronics Tech Co Ltd

Inventors

• Hai Bo

Classifications

• G02F1/133531 Primary

  characterised by the arrangement of polariser or analyser axes · CPC title

• G02B5/3083

  Birefringent or phase retarding elements (G02B5/3008, G02B5/3016 take precedence; systems for polarisation control G02B27/286; manufacturing phase modulating patterns by lithographic processes G03F7/001) · CPC title

• G02F1/133638

  Waveplates, i.e. plates with a retardation value of lambda/n · CPC title

• G02F2202/28

  Adhesive materials or arrangements · CPC title

• H10K50/86 Primary

  Arrangements for improving contrast, e.g. preventing reflection of ambient light · CPC title