Optical path adjusting unit and display device

Patent metadata

Field	Value
Publication number	US-9759406-B2
Application number	US-201514894883-A
Country	US
Kind code	B2
Filing date	Jun 18, 2015
Priority date	Jan 6, 2015
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

The invention provides an optical path adjusting unit and a display device. The optical path adjusting unit, for adjusting light rays from different directions to transmit in approximately the same direction, comprises a light converging part, a reflective part and a light scattering part. The light converging part and the light scattering part form a hollow space, and the reflective part is disposed within the hollow space and connected to the middle of the light converging part and the middle of the light scattering part to divide the hollow space into two parts. The light converging part is used to converge the light rays from different directions; the reflective part is used to reflect the converged light rays onto the light scattering part, and the light scattering part is used to transmit the light rays reflected thereon by the reflective part out in approximately the same direction.

First claim

What is claimed is:

1. An optical path adjusting unit for adjusting light rays incident from different directions to transmit in approximately the same direction, comprising a light converging part, a reflective part and a light scattering part; the light converging part and the light scattering part forming a hollow space, the reflective part disposed within the hollow space and connected to the middle of the light converging part and the middle part of the light scattering part respectively to divide the hollow space into two parts;
wherein the light converging part is used to converge light rays incident thereon from different directions, the reflective part is used to reflect the light rays converged by the light converging part onto the light scattering part, and the light scattering part is used to transmit the light rays reflected thereon by the reflective part out in approximately the same direction.

2. The optical path adjusting unit of claim 1 , wherein the light converging part comprises two arc structures disposed symmetrically, the light scattering part is a symmetric arc structure, the light converging part and the light scattering part form a symmetric hallow space, the reflective part is arranged in a symmetric plane of the symmetric hollow space, and the light rays reflected onto the light scattering part are transmitted out in a direction approximately parallel to the direction of the symmetric plane of the hollow space.

3. The optical path adjusting unit of claim 2 , wherein the light converging part comprises two arc light converging sheets with the same shape and size and disposed in the form of mirror symmetry; wherein the two light converging sheets are connected to each other at one end, and the other ends are connected to the two ends of the light scattering part respectively; the reflective part is disposed in the mirror symmetric plane of the two light converging sheets, one end of which is connected to the ends of the two light converging sheets connected to each other, and the other end is connected to the middle of the light scattering part, which is located in the symmetric plane of the light scattering part.

4. The optical path adjusting unit of claim 3 , wherein each of the light converging sheets is a convex lens structure, a radian of the arc surface of the light converging sheet close to the hollow space is greater than that of the arc surface far away from the hollow space.

5. The optical path adjusting unit of claim 3 , wherein the light scattering part is a concave lens structure.

6. The optical path adjusting unit of claim 3 , wherein the reflective part is a symmetric wedge-shaped structure, and the larger end of the symmetric wedge-shaped structure is connected to the ends of the two light converging sheets connected to each other, the smaller end is connected to the middle of the light scattering part which is located in the symmetric plane of the light scattering part, and
the two side surfaces of the symmetric wedge-shaped structure facing the two light converging sheets are disposed with reflective films respectively.

7. The optical path adjusting unit of claim 6 , wherein the angle of the symmetric wedge-shaped structure is in the range of 3° to 7° .

8. The optical path adjusting unit of claim 1 , wherein the light converging part, the reflective part and the light scattering part are formed integrally;
or, the light converging part, the light scattering part and the reflective part are formed respectively, and then are assembled together;
or, the light converging part and the light scattering part are formed integrally, and the reflective part is formed independently, and then the reflective part formed independently and the light converging part and the light scattering part formed integrally are assembled together.

9. The optical path adjusting unit of claim 1 , wherein the light converging part, the reflective part and the light scattering part are formed by using colorless and transparent materials.

10. The optical path adjusting unit of claim 9 , wherein the light converging part, the reflective part and the light scattering part are formed by using glass materials or resin materials.

11. A display device, comprising at least two display screens which can be spliced together, there being a splicing gap between the adjacent display screens, wherein the optical path adjusting unit of claim 1 is disposed in the splicing gap.

12. The display device of claim 11 , wherein the edge part of the at least two display screen bends inwards to form a bended part, and the splicing gap is formed between the bended parts of the adjacent display screens; wherein the optical path adjusting unit is disposed in the splicing gap, and the lengths of the light converging part, the reflective part, and the slight scattering part are the same as that of the splicing gap of the display screens.

13. The display device of claim 12 , wherein the bended part of the display screen comprises a plane part and a curve surface part, wherein a radian of the curve surface part is consistent with a radian of the arc surface of the light converging part, in the light converging part, far away from the hollow space; wherein the curve surface part comprises a black matrix and a light emitting unit, and the light rays emitted from the light emitting unit enter into the light converging part in different directions and are transmitted out of the light scattering part in a direction approximately parallel to the direction of the plane part.

14. The display device of claim 11 , wherein the light converging part comprises two arc structures disposed symmetrically, the light scattering part is a symmetric arc structure, the light converging part and the light scattering part form a symmetric hallow space, the reflective part is arranged in a symmetric plane of the symmetric hollow space, and the light rays reflected onto the light scattering part are transmitted out in a direction approximately parallel to the direction of the symmetric plane of the hollow space.

15. The display device of claim 14 , wherein the light converging part comprises two arc light converging sheets with the same shape and size and disposed in the form of mirror symmetry; wherein the two light converging sheets are connected to each other at one end, and the other ends are connected to the two ends of the light scattering part respectively; the reflective part is disposed in the mirror symmetric plane of the two light converging sheets, one end of which is connected to the ends of the two light converging sheets connected to each other, and the other end is connected to the middle of the light scattering part, which is located in the symmetric plane of the light scattering part.

16. The display device of claim 15 , wherein each of the light converging sheets is a convex lens structure, a radian of the arc surface of the light converging sheet close to the hollow space is greater than that of the arc surface far away from the hollow space.

17. The display device of claim 15 , wherein the light scattering part is a concave lens structure.

18. The display device of claim 15 , wherein the reflective part is a symmetric wedge-shaped structure, and the larger end of the symmetric wedge-shaped structure is connected to the ends of the two light converging sheets connected to each other, the smaller end is connected to the middle of the light scattering part which is located in the symmetric plane of the light scattering part, and
the two side surfaces of the symmetric wedge-shaped structure facing

Assignees

• Boe Technology Group Co Ltd

Inventors

• Sun Yanliu

Classifications

• G02B17/0856

  comprising a refractive element with a reflective surface, the reflection taking place inside the element, e.g. Mangin mirrors · CPC title

• G02B27/00 Primary

  Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 · CPC title

• G02B19/0047 Primary

  for use with a light source (G02B19/009, G02B19/0095 take precedence; details of lighting devices in general F21V; non-semiconductor lasers having optical devices external to the laser cavity H01S3/005) · CPC title

• G02B19/009

  for use with infrared radiation · CPC title

• G02F1/133504

  Diffusing, scattering, diffracting elements (associated to illuminating devices G02F1/133606) · CPC title