Lighting device and vehicle lamp including same

• US 10,447,987 B2
• Filed: 05/27/2016
• Issued: 10/15/2019
• Est. Priority Date: 05/28/2015
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Lee, Dong Hyun
• Primary Examiner(s): Neils, Peggy A
• Application Number:
  US15/576,946
• Publication Number:
  US 20180160095A1
• Time in Patent Office: 1,236 Days
• CPC Class Codes: B60Q 1/0058 Stacked, i.e. one lamp located behind the other in the optical axis direction
• CPC Class Codes: F21S 43/16 Light sources where the light is generated by photoluminescent material spaced from a primary light generating element
• 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 43/247 with a single light source 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: G02B 6/0033 Means for improving the coupling-out of light from the light guide
• CPC Class Codes: G02B 6/0043 provided on the surface of the light guide
• 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: H04N 13/128 Adjusting depth or disparity
• CPC Class Codes: H04N 13/395 with depth sampling, i.e. the volume being constructed from a stack or sequence of 2D image planes

Abstract

Provided are a lighting apparatus that is capable of implementing various stereoscopic effects and a lamp for a vehicle including the lighting apparatus. A volumic type, a depth effect, and a stereoscopic effect of optical patterns emitted after an interaction of excited light of emission layers disposed in adjacent light source modules can be implemented so that various designs of three-dimensional (3D) light can be implemented.

Claims

1. A lighting apparatus comprising a first light source module and a second light source module, which are spaced a predetermined distance apart from each other, wherein the first light source module comprises:

a first light guide member configured to guide a first light emitted from a first light source; and

a first emission layer, which is formed on the first light guide member and in which the first light from the first light source is used as excited light, and the first emission layer to provide a third light having a different wavelength than the first light, and

wherein the second light source module comprises;

a second light guide member configured to guide a portion of the third light from the first emission layer and a second light emitted from a second light source; and

a second emission layer, which is formed on the second light guide member and in which the third light that is provided from the first emission layer and the second light from the second light source are used as excited light, and the second emission layer to provide a fourth light having a different wavelength than the third light from the first emission layer and the second light from the second light source, wherein the fourth light from the second emission layer is to have a stereoscopic effect.

2. The lighting apparatus of claim 1, wherein the first light guide member and the second light guide member are formed of synthetic resin materials for implementing birefringence.

3. The lighting apparatus of claim 2, wherein light transmissivity of the first light guide member and the second light guide member is 10 to 99%.

4. The lighting apparatus of claim 1, wherein light transmissivity of the first emission layer and the second emission layer is 10 to 99%.

5. The lighting apparatus of claim 1, wherein ultraviolet (UV) wavelength light is used as part of the excited light for the first and second emission layers.

6. The lighting apparatus of claim 1, wherein the first emission layer and the second emission layer are disposed adjacent to each other so as to share a portion or all of an optical path that passes through an emission surface of the first light guide member.

7. The lighting apparatus of claim 6, wherein the second light guide member is spaced a predetermined distance apart from the first light guide member.

8. The lighting apparatus of claim 6, wherein the first emission layer is on a top surface of the first light guide member, the second emission layer is on a top surface of the second light guide member, and at least one portion of the first emission layer overlaps the second emission layer.

9. The lighting apparatus of claim 6, wherein the first emission layer includes a first pattern layer, the second emission layer includes a second pattern layer, and area of the first pattern layer is different than area of the second pattern layer.

10. The lighting apparatus of claim 6, wherein light of different wavelength bands is used as part of the excited light for the first and second emission layers.

11. The lighting apparatus of claim 1, further comprising a cut filter that blocks light emitted from the first light source and the second light source, and transmits light converted by the first emission layer and the second emission layer.

12. A lamp for a vehicle, comprising the lighting apparatus of claim 1.

13. The lighting apparatus of claim 1, wherein the first emission layer has a first shape, and the second emission layer has a second shape different from the first shape.

14. The lighting apparatus of claim 1, wherein the first emission layer includes transparent ink, and the second emission layer includes transparent ink.