Light concentrating film and display device

Patent metadata

Field	Value
Publication number	US-9588346-B2
Application number	US-201414314628-A
Country	US
Kind code	B2
Filing date	Jun 25, 2014
Priority date	Apr 24, 2014
Publication date	Mar 7, 2017
Grant date	Mar 7, 2017

Abstract

The present disclosure provides a light concentrating film and a display device. The light concentrating film has a planar shape, and includes multiple light concentrating units which are connected to each other so as to concentrate the incident light on a light incoming side of the light concentrating film at the light outgoing side of the light concentrating film. The display device of the present disclosure includes a display panel and the light concentrating film of the present disclosure, and the light outgoing side of the light concentrating film faces a light incoming side of the display panel.

First claim

What is claimed is:

1. A light concentrating film, wherein the light concentrating film has a planar shape and comprises a plurality of light guides, side walls of the plurality of the light guides are connected to each other such that incident light on a light incoming side of the light concentrating film is concentrated on a light outgoing side of the light concentrating film,
wherein the light concentrating film further comprises a plurality of light concentrating convex lenses disposed on the light incoming side of the light guides, and the light concentrating convex lenses are configured to concentrate the incident light on the light incoming side of the light concentrating film on the light incoming side of the light guides;
wherein surfaces of the light outgoing side of the light concentrating convex lenses are each of a circular arc shape; and
wherein principal optical axes of the light concentrating convex lenses are aligned with the axes of the light guides, respectively.

2. The light concentrating film according to claim 1 , wherein each of the light guides has a truncated cone shape.

3. The light concentrating film according to claim 2 , wherein each of the light guides has a larger diameter on a light incoming side of the light guides than a light outgoing side of the light guides.

4. The light concentrating film according to claim 2 , wherein each of the light guides is a solid truncated cone which has only one type of interior media.

5. The light concentrating film according to claim 2 , wherein side walls of two neighbouring light guides are connected to each other through a filling.

6. The light concentrating film according to claim 5 , wherein the material of the filling has a smaller refractive index than the material of the light guides.

7. The light concentrating film according to claim 2 , wherein a plurality of sides of the light concentrating convex lenses are directly connected to each other or are indirectly connected to each other by a mediator.

8. The light concentrating film according to claim 1 , wherein a plurality of sides of the light concentrating convex lenses are connected to each other.

9. The light concentrating film according to claim 1 , wherein the light outgoing side of the light concentrating convex lenses is connected to the light incoming side of the light guides.

10. The light concentrating film according to claim 1 , wherein the light incoming side of the light concentrating convex lenses has a planar shape, and the light outgoing side of the light concentrating convex lenses has a convex shape.

11. A display device, comprising a display panel and a light concentrating film, wherein the light concentrating film has a planar shape and comprises a plurality of light guides, side walls of the plurality of the light guides are connected to each other such that incident light on a light incoming side of the light concentrating film is concentrated on a light outgoing side of the light concentrating film,
wherein the light concentrating film further comprises a plurality of light concentrating convex lenses disposed on the light incoming side of the light guides, and the light concentrating convex lenses are configured to concentrate the incident light on the light incoming side of the light concentrating film on the light incoming side of the light guides;
wherein surfaces of the light outgoing side of the light concentrating convex lenses each is of a circular arc shape; and
wherein principal optical axes of the light concentrating convex lenses are aligned with the axes of the light guides respectively.

12. The display device according to claim 11 , wherein a diameter of each of the light guides on the light incoming side is equal to a distance H between centers of two neighboring black matrixes on the display panel.

13. The display device according to claim 11 , wherein a diameter of each of the light guides on the light outgoing side is equal to a distance h between two opposite edges of two neighboring black matrixes on the display panel.

14. The display device according to claim 11 , wherein the light outgoing side of the light guides is opposite to a subpixel between black matrixes on the display panel.

15. The display device according to claim 11 , further comprising an anti-reflective film which is disposed between the display panel and the light concentrating film.

16. The display device according to claim 11 , further comprising a backlight module which is disposed on the light incoming side of the light concentrating film.

17. The display device according to claim 11 , wherein the display device comprises at least one of a liquid crystal panel, an electronic paper, a liquid crystal TV, a liquid crystal display (LCD), a digital photo frame, a mobile phone, a tablet computer, and an outdoor display.

Assignees

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

Inventors

• Bai Ling
• Wang Hetao
• Lu Kun
• Yan Kai
• Li Jingshi

Classifications

• G02B27/0955

  Lenses (lenses per se G02B3/00) · CPC title

• G02B27/0977 Primary

  Reflective elements · CPC title

• G02F1/1335

  Structural association of cells with optical devices, e.g. polarisers or reflectors · CPC title

• G02F1/133567

  on the back side · CPC title

• G02F1/133553

  Reflecting elements (associated to illuminating devices G02F1/133605) · CPC title