Lighting device

Patent metadata

Field	Value
Publication number	US-10746355-B2
Application number	US-201616064384-A
Country	US
Kind code	B2
Filing date	Dec 21, 2016
Priority date	Dec 21, 2015
Publication date	Aug 18, 2020
Grant date	Aug 18, 2020

Abstract

Provided is a lighting device that converts an exiting light into a stereoscopic light having a sense of depth or a sense of volume, whereby light images having stereoscopic effects can be implemented using light emitted from a light-emitting device and simultaneously, a structure of a printed circuit board (PCB) located at a lower portion of a light passage portion is eliminated and a direct-type light-emitting device located at sides of the light passage portion and having high versatility is used such that flexibility of the light passage portion is attained and a degree of freedom of a design can be enhanced.

First claim

The invention claimed is:

1. A lighting device comprising:
a light-transmitting support member;
a light guide unit located on the light-transmitting support member;
a light source unit located on sides of the light guide unit; and
a light converter configured to convert light incident on the light guide unit,
wherein the light source unit includes a printed circuit board (PCB) and a light-emitting device located on a first flat surface of the PCB,
wherein the first flat surface of the PCB faces the sides of the light guide unit,
wherein the light-emitting device is located on the light-transmitting support member,
wherein the light converter comprises a light passage portion and a plurality of unit patterns are sequentially arranged on the light passage portion,
wherein the plurality of unit patterns includes an inclined plane inclined with respect to a first flat surface or a second flat surface of the light passage portion, and
wherein the light converter, by reflection and refraction at the inclined plane, induces incident light inside the light guide unit in a first flat surface direction towards which the first flat surface of the light passage portion faces or in a second flat surface direction towards which the second flat surface of the light passage portion faces, thereby implementing linear lights on a first path that is orthogonal in pattern extension directions of the plurality of unit patterns.

2. The lighting device of claim 1 , further comprising a reflection member located between the light-transmitting support member and the light guide unit.

3. The lighting device of claim 2 , wherein a light exiting surface of the light-emitting device faces a side of the reflection member.

4. The lighting device of claim 3 , wherein the light guide unit includes an extension portion located between the light exiting surface of the light-emitting device and the side of the reflection member.

5. The lighting device of claim 1 , wherein the light converter is disposed on the light guide unit.

6. The lighting device of claim 2 , wherein the light converter is disposed between the light guide unit and the reflection member.

7. The lighting device of claim 1 , further comprising a protection film located on the light guide unit, wherein the protection film is located on the light-emitting device.

8. The lighting device of claim 2 , wherein the reflection member includes light-transmitting patterns.

9. The lighting device of claim 8 , wherein an area of the light-transmitting patterns is 20% to 80% of the entire area of the reflection member.

10. The lighting device of claim 2 , wherein the reflection member includes a plurality of reflection patterns spaced apart from one another.

11. The lighting device of claim 10 , wherein an area of a reflection pattern closest to the light-emitting device is greater than an area of the other reflection patterns.

12. The lighting device of claim 2 , wherein the reflection member comprises a plurality of reflection patterns spaced away in a first direction and a plurality of light-transmitting patterns disposed between the plurality of reflection patterns.

13. The lighting device of claim 2 , wherein the reflection member comprises a plurality of reflection patterns and a plurality of light-transmitting patterns,
wherein the plurality of light-transmitting patterns comprises first light-transmitting patterns extending in a first direction and second light-transmitting patterns extending a second direction orthogonal to the first direction,
wherein the plurality of reflection patterns is separated by the first light-transmitting patterns and the second light-transmitting patterns.

14. The lighting device of claim 1 , wherein the light emits from the light converter and the light-transmitting support member.

15. The lighting device of claim 14 , wherein the plurality of unit patterns comprises a plurality of pattern groups arranged in a first direction,
wherein the plurality of pattern groups is spaced away from each other in a second direction orthogonal to the first direction.

16. The lighting device of claim 15 , wherein each of the plurality of the unit patterns extends in the second direction.

17. The lighting device of claim 15 , wherein the light converter comprises a separation portion disposed between the plurality of pattern groups,
wherein the separation portion comprises a flat surface.

18. The lighting device of claim 1 , wherein a surface roughness of the inclined plane is 0.8 μm or less.

19. The lighting device of claim 1 , wherein a refractive index of the light passage portion and the plurality of unit patterns is in a range of 1.30 to 1.80.

20. The lighting device of claim 1 , wherein an inclination angle of the inclined plane is greater than 23.6° and less than about 56.3°.

Assignees

• Lg Innotek Co Ltd

Inventors

• Lim Eay Jin
• Jang Jae Hyuk
• Yang Hyun Duck

Classifications

• F21S43/26

  Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255 · CPC title

• G02B30/30

  involving parallax barriers · CPC title

• F21S43/245

  emitting light from one or more of its major surfaces · CPC title

• F21S43/14 Primary

  Light emitting diodes [LED] · CPC title

• F21Y2105/10

  comprising a two-dimensional [2D] array of point-like light-generating elements · CPC title