Viewing angle controlling light source device and display apparatus

Patent metadata

Field	Value
Publication number	US-10120260-B2
Application number	US-201615541978-A
Country	US
Kind code	B2
Filing date	Nov 17, 2016
Priority date	Jan 8, 2016
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

Abstract

A viewing angle controlling light source device and a display apparatus are provided. The viewing angle controlling light source device includes a base substrate; a light emitting array arranged on the base substrate, wherein the light emitting array includes a plurality of light emitting units; at least one liquid crystal lens array arranged on the light emitting array, wherein the liquid crystal lens array includes a plurality of liquid crystal lens units corresponding to the light emitting units one by one, each liquid crystal lens unit includes a first electrode and a second electrode, and a liquid crystal layer arranged between the first electrode and the second electrode, a light emergent direction of light emitted by the light emitting unit after the light transmitting through the liquid crystal lens unit by regulating a voltage difference between the first electrode and the second electrode.

First claim

What is claimed is:

1. A viewing angle controlling light source device, comprising:
a base substrate;
a light emitting array arranged on the base substrate, wherein the light emitting array comprises a plurality of light emitting units; and
at least one liquid crystal lens array arranged on the light emitting array, wherein the liquid crystal lens array comprises a plurality of liquid crystal lens units corresponding to the light emitting units one by one; wherein
each of the liquid crystal lens units comprises a first electrode disposed on a first base, a second electrode disposed on a second base, and a liquid crystal layer arranged between the first electrode and the second electrode; the first electrode and the second electrode are oppositely arranged; the first electrode and the second electrode are configured to apply voltages respectively; and each of the liquid crystal lens units is configured to adjust a light emergent direction of light emitted by the light emitting units after the light transmitting through the liquid crystal lens unit by regulating a voltage difference between the first electrode and the second electrode.

2. The viewing angle controlling light source device according to claim 1 , wherein a plurality of liquid crystal lens arrays are arranged on the light emitting array.

3. The viewing angle controlling light source device according to claim 2 , wherein the first electrode and the second electrode of the liquid crystal lens unit of each liquid crystal lens array are configured to generate a voltage difference, so that in a direction perpendicular to the base substrate, refractive indexes of the liquid crystal layers of the liquid crystal lens units of the plurality of liquid crystal lens arrays present gradient change.

4. The viewing angle controlling light source device according to claim 3 , wherein a refractive index of a liquid crystal layer of a liquid crystal lens unit closer to a light emergent side is less than that of a liquid crystal layer of a liquid crystal lens unit farther away from the light emergent side.

5. The viewing angle controlling light source device according to claim 1 , wherein the plurality of light emitting units comprise electroluminescence chips capable of emitting light of different wave lengths.

6. The viewing angle controlling light source device according to claim 5 , wherein the electroluminescence chips capable of emitting light of different wave lengths comprise: a red light emitting chip, a green light emitting chip and a blue light emitting chip.

7. The viewing angle controlling light source device according to claim 1 , wherein the plurality of light emitting units are white light emitting chips.

8. The viewing angle controlling light source device according to claim 1 , wherein the base substrate is composed of a base made of glass or copper material, and graphene, gallium nitride or silicon material disposed on the base.

9. A display apparatus, comprising the viewing angle controlling light source device according to claim 1 .

10. The display apparatus according to claim 9 , further comprising a display module arranged on a side of the light emergent surface of the viewing angle controlling light source device.

11. The display apparatus according to claim 10 , wherein the display module comprises a pixel array, and the pixel array comprises pixel units corresponding to the light emitting units one by one.

12. The display apparatus according to claim 10 , wherein the plurality of light emitting units in the viewing angle controlling light source device comprise electroluminescence chips capable of emitting light of different wave lengths, and
the display module comprises an array substrate and an opposed substrate which are oppositely arranged.

13. The display apparatus according to claim 10 , wherein the plurality of light emitting units in the viewing angle controlling light source device are white light emitting chips, and
the display module comprises an array substrate and a color film substrate which are oppositely arranged.

14. The viewing angle controlling light source device according to claim 2 , wherein the plurality of light emitting units comprise electroluminescence chips capable of emitting light of different wave lengths.

15. The viewing angle controlling light source device according to claim 3 , wherein the plurality of light emitting units comprise electroluminescence chips capable of emitting light of different wave lengths.

16. The viewing angle controlling light source device according to claim 4 , wherein the plurality of light emitting units comprise electroluminescence chips capable of emitting light of different wave lengths.

17. The viewing angle controlling light source device according to claim 2 , wherein the plurality of light emitting units are white light emitting chips.

18. The viewing angle controlling light source device according to claim 3 , wherein the plurality of light emitting units are white light emitting chips.

19. The viewing angle controlling light source device according to claim 2 , wherein the base substrate is composed of a base made of glass or copper material, and graphene, gallium nitride or silicon material disposed on the base.

20. The viewing angle controlling light source device according to claim 3 , wherein the base substrate is composed of a base made of glass or copper material, and graphene, gallium nitride or silicon material disposed on the base.

21. The viewing angle controlling light source device according to claim 1 , wherein the liquid crystal layer is made of cholesteric liquid crystal, nematic liquid crystal or smectic liquid crystal.

Assignees

• Boe Technology Group Co Ltd
• Beijing Boe Optoelectronics Tech Co Ltd

Inventors

• Wang Chenru
• Dong Xue
• Sun Haiwei
• Dong Ruijun
• Yu Lu
• Chen Lili

Classifications

• G02B30/27

  involving lenticular arrays · CPC title

• G02F2201/44

  Arrangements combining different electro-active layers, e.g. electrochromic, liquid crystal or electroluminescent layers · CPC title

• G02F1/133606

  including a specially adapted diffusing, scattering or light controlling members · CPC title

• G02F2203/58

  Multi-wavelength, e.g. operation of the device at a plurality of wavelengths · CPC title

• G02F1/1323

  Arrangements for providing a switchable viewing angle · CPC title