LIGHT SOURCE MODULE BASED ON GRADED INDEX LENS, LAMP ASSEMBLY, AND AUTOMOBILE

• US 20190323673A1
• Filed: 04/23/2019
• Published: 10/24/2019
• Est. Priority Date: 04/24/2018
• Status: Active Grant

• Current Assignee: HASCO Vision Technology Co., Ltd. (City of Shanghai)
• Original Assignee: HASCO Vision Technology Co., Ltd. (City of Shanghai)
• Inventors: ZHANG, Jie
• Granted Patent: US 10,724,701 B2
• Time in Patent Office: Days
• CPC Class Codes: F21S 41/147 the main emission direction of the LED being angled to the optical axis of the illuminating device
• CPC Class Codes: F21S 41/148 the main emission direction of the LED being perpendicular to the optical axis
• CPC Class Codes: F21S 41/255 Lenses with a front view of circular or truncated circular outline
• CPC Class Codes: F21S 41/275 Lens surfaces, e.g. coatings or surface structures
• 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 41/32 Optical layout thereof
• CPC Class Codes: F21S 41/321 the reflector being a surface of revolution or a planar surface, e.g. truncated
• CPC Class Codes: F21V 7/08 with elliptical curvature
• CPC Class Codes: G02B 19/0028 refractive and reflective surfaces, e.g. non-imaging catadioptric systems
• CPC Class Codes: G02B 19/0061 the light source comprising a LED semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission H01L33/00
• CPC Class Codes: G02B 3/0087 with index gradient

Abstract

The present disclosure relates to the field of automobile lamp technologies, and in particular, to a light source module based on a graded index lens, a lamp assembly including the light source module, and an automobile including the lamp assembly. The light source module includes a light source and a graded index lens disposed in front of the light source. Light emitted from the light source is incident to an incident surface of the graded index lens, and is emitted from an out-light surface of the graded index lens after being refracted and converged by using the graded index lens. The graded index lens converges the light emitted from the light source, so that the light has relatively large optical radioactive energy and a relatively small divergence angle on the out-light surface of the graded index lens.

Claims

1. A light source module based on a graded index lens, comprising a light source (1) and a graded index lens (2) disposed in front of the light source (1), wherein light emitted from the light source (1) is incident to an incident surface of the graded index lens (2), and is emitted from an emitting surface (2a) of the graded index lens (2) after being refracted and converged by the graded index lens (2).

2. The light source module based on a graded index lens according to claim 1, wherein the light source (1) is a planar light source with Lambertian divergence.

3. The light source module based on a graded index lens according to claim 1, wherein refractive indexes of the graded index lens (2) are distributed in stepped descending order from a center to a periphery.

4. The light source module based on a graded index lens according to claim 3, wherein the stepped descending order is sequentially cascading in a circumferential direction radially from the center to the periphery of the graded index lens (2).

5. The light source module based on a graded index lens according to claim 3, wherein the stepped descending order is sequentially cascading along a normal of a central plane of the graded index lens (2) from the central plane to the periphery of the graded index lens (2).

6. The light source module based on a graded index lens according to claim 1, wherein refractive indexes of the graded index lens (2) are distributed in radially graded descending order from a center to a periphery, and a distribution curve of the refractive index is:

7. A lamp assembly, comprising the light source module based on a graded index lens according to claim 1.

8. The lamp assembly according to claim 7, wherein the lamp assembly further comprises a convex lens (3), the emitting surface (2a) of the graded index lens (2) in the light source module is disposed at a focus of the convex lens (3).

9. The lamp assembly according to claim 7, wherein the lamp assembly further comprises a reflector, a light shielding plate, and a convex lens, the reflector is a quasi-ellipsoid, the reflector has a near focus and a far focus, the out-light surface (2a) of the graded index lens (2) in the light source module is disposed at the near focus of the reflector, the far focus of the reflector is near a focus of the convex lens, and the light shielding plate is located at the focus of the convex lens.

10. An automobile, comprising the lamp assembly according to claim 7.