Lighting apparatus and vehicular lamp comprising the same

• US 10,300,836 B2
• Filed: 10/20/2015
• Issued: 05/28/2019
• Est. Priority Date: 10/22/2014
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Chae, Hyun Hee, Park, Kwang Ho, Lee, Byoung Eon
• Primary Examiner(s): Tran, Thuy V
• Application Number:
  US15/521,251
• Publication Number:
  US 20180326895A1
• Time in Patent Office: 1,316 Days
• Field of Search: 362507
• CPC Class Codes: B60Q 1/00 Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor for lighting vehicle interior B60Q3/00
• CPC Class Codes: B60Q 1/02 the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
• CPC Class Codes: F21S 41/141 Light emitting diodes [LED]
• CPC Class Codes: F21S 41/24 Light guides
• CPC Class Codes: F21S 41/285 Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24-F21S41/28
• CPC Class Codes: F21S 41/30 characterised by reflectors
• CPC Class Codes: F21S 41/37 characterised by their material, surface treatment or coatings
• CPC Class Codes: F21S 41/40 characterised by screens, non-reflecting members, light-shielding members or fixed shades
• CPC Class Codes: F21S 43/14 Light emitting diodes [LED]
• CPC Class Codes: F21S 43/239 plate-shaped
• CPC Class Codes: F21S 43/245 emitting light from one or more of its major surfaces
• CPC Class Codes: F21S 43/249 with two or more light sources being coupled into the light guide
• CPC Class Codes: F21S 43/26 Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
• CPC Class Codes: F21S 43/30 characterised by reflectors
• CPC Class Codes: F21S 43/40 characterised by the combination of reflectors and refractors
• CPC Class Codes: G02B 6/0021 for housing at least a part of the light source, e.g. by forming holes or recesses
• CPC Class Codes: G02B 6/0025 Diffusing sheet or layer; Prismatic sheet or layer
• CPC Class Codes: G02B 6/0028 Light guide, e.g. taper
• CPC Class Codes: G02B 6/0041 provided in the bulk of the light guide
• CPC Class Codes: G02B 6/0051 Diffusing sheet or layer
• CPC Class Codes: G02B 6/0055 : Reflecting element, sheet or layer
• CPC Class Codes: G02B 6/0065 : Manufacturing aspects; Material aspects
• CPC Class Codes: G02B 6/0068 : Arrangements of plural sources, e.g. multi-colour light sources
• CPC Class Codes: G02B 6/0076 : Stacked arrangements of multiple light guides of the same or different cross-sectional area
• CPC Class Codes: G02B 6/0091 : of the light source relative to the light guide G02B6/0021 takes precedence

Abstract

In the present invention, there is provided a lighting device including: a light source module including at least one light source and a light guide member that buries the light source; a shielding module accommodating the light source module therein, the shielding module having an opening region and a shielding region, which are provided above the light guide member; and a diffusion member disposed in the light guide member.

Claims

1. A lighting device comprising:

a light source module including at least one light source disposed on a printed circuit board and a light guide member in which the light source is buried;

a diffusion member disposed in the light guide member;

a shielding module accommodating the light source module therein; and

a reflection member disposed on the printed circuit board,

wherein the reflection member includes a side reflection member disposed between the at least light source and an inner side surface of the shielding module, and

wherein the light guide member that is in contact with upper and lower portions of the diffusion member is made of the same material.

2. The lighting device of claim 1, wherein the diffusion member is spaced apart from the light source.

3. The lighting device of claim 2, wherein the diffusion member is disposed parallel to an upper surface of the light guide member.

4. The lighting device of claim 2, wherein the light guide member is in direct contact with the light source.

5. The lighting device of claim 4, wherein the light guide member includes a resin in which a urethane acrylate oligomer corresponding to a synthetic oligomer and a polyacrylic polymer are mixed together.

6. The lighting device of claim 2, wherein the shielding module includes an opening region provided in an upper direction of the light guide member, and a shielding region that extends from the opening region.

7. The lighting device of claim 6, wherein the shielding module includes:

a shielding body surrounding lower and side surfaces of the light source module, the shielding body having the opening region formed by opening a partial region of an upper portion of the shielding body; and

a bending part formed by bending one end of the upper portion of the shielding body toward a center of the light source module.

8. The lighting device of claim 7, wherein a lower surface of the bending part is in contact with an upper surface of the light guide member.

9. The lighting device of claim 7, wherein a length of the bending part is formed longer than a distance from one end of the light guide member to the light source.

10. The lighting device of claim 7, wherein the shielding module is formed of a material including any one of aluminum (Al), polycarbonate (PC), polypropylene (PP), acrylonitrile-butadiene-styrene resin (ABS), and polybutyrene terephthalate resin (PBT).

11. The lighting device of claim 7, further comprising a lens member disposed between a lower surface of the shielding body and an upper surface of the light guide member,

wherein the lens member and the light guide member are formed in a non-air-gap structure.

12. The lighting device of claim 11, wherein a lower surface of the bending part is in direct contact with an upper surface of the lens member.

13. The lighting device of claim 11, wherein the lens member is disposed at a position corresponding to the opening region.

14. The lighting device of claim 11, wherein the lens member and the light guide member are formed in a non-air-gap structure.

15. The lighting device of claim 1, wherein the reflection member includes the side reflection member and a lateral reflection member which are made of the same material, wherein the side reflection member is disposed in the shielding module.

16. The lighting device of claim 1, wherein the side reflection member is in contact with the at least one light source.

17. The lighting device of claim 1, wherein the side reflection member is in contact with a bottom surface of the diffusion member.

18. A lighting device comprising:

a light source module including at least one light source disposed on a printed circuit board and a light guide member in which the light source is buried;

a diffusion member disposed in the light guide member;

a shielding module accommodating the light source module therein; and

a reflection member disposed on the printed circuit board,

wherein the reflection member includes a side reflection member disposed between the at least light source and an inner side surface of the shielding module, and

wherein the diffusion member is disposed in a structure dividing the light guide member into two in a lateral direction.

19. A vehicle lamp comprising:

a bracket configured to form a light shield; and

a lighting device disposed in the bracket, the lighting device including;

a light source module disposed in the body, the light source module including at least one light source disposed on a printed circuit board and a light guide member in which the light source is buried;

a diffusion member disposed in the light guide member; and

a reflection member disposed on the printed circuit board,

wherein the reflection member includes a side reflection member disposed between the at least light source and an inner side surface of the bracket, and

wherein the light guide member that is in contact with upper and lower portions of the diffusion member is made of the same material.