Vehicle lamp

Patent metadata

Field	Value
Publication number	US-9494290-B2
Application number	US-201213443322-A
Country	US
Kind code	B2
Filing date	Apr 10, 2012
Priority date	Apr 12, 2011
Publication date	Nov 15, 2016
Grant date	Nov 15, 2016

Abstract

A vehicle lamp includes a semiconductor light source disposed on an optical axis of the vehicle lamp, a reflector having a plurality of reflective surfaces radially divided about the optical axis and boundary portions formed between two of the reflective surfaces adjacent to each other, and a lens cap that covers the front side of the light source. The lens cap includes a side lens portion that projects laterally emitted light from the light source toward the reflector. The laterally emitted light makes an angle with the optical axis that is at least a predetermined angle. The side lens portion is divided into at least two lens elements in a circumferential direction around the optical axis, and refracts the laterally emitted light so that the laterally emitted light avoids the boundary portions.

First claim

What is claimed is:

1. A vehicle lamp comprising:
a semiconductor light source disposed on an optical axis of the vehicle lamp;
a reflector comprising a plurality of reflective surfaces radially divided about the optical axis and boundary portions formed between two of the reflective surfaces adjacent to each other; and
a lens cap that covers the front side of the light source,
wherein the lens cap comprises a side lens portion that projects laterally emitted light from the light source toward the reflector,
wherein the laterally emitted light makes an angle with the optical axis that is at least a predetermined angle, and
wherein the side lens portion is divided into at least two lens elements in a circumferential direction around the optical axis, and refracts the laterally emitted light so that the laterally emitted light avoids the boundary portions.

2. The vehicle lamp according to claim 1 , wherein the side lens portion is a condensing lens that condenses the laterally emitted light in a direction perpendicular to the optical axis.

3. The vehicle lamp according to claim 2 , wherein the boundary portions are provided with ribs that protrude forward from the reflector.

4. The vehicle lamp according to claim 3 , wherein at least one of the lens cap and the reflector is fixed to a substrate on which the light source is mounted.

5. The vehicle lamp according to claim 2 , wherein at least one of the lens cap and the reflector is fixed to a substrate on which the light source is mounted.

6. The vehicle lamp according to claim 1 , wherein the boundary portions are provided with ribs that protrude forward from the reflector.

7. The vehicle lamp according to claim 6 , wherein at least one of the lens cap and the reflector is fixed to a substrate on which the light source is mounted.

8. The vehicle lamp according to claim 1 , wherein at least one of the lens cap and the reflector is fixed to a substrate on which the light source is mounted.

9. The vehicle lamp according to claim 1 , wherein the side lens portion refracts the laterally emitted light toward the reflective surfaces so that the laterally emitted light avoids the boundary portions.

10. A vehicle lamp comprising:
a semiconductor light source disposed on an optical axis of the vehicle lamp;
a reflector comprising a plurality of reflective surfaces radially divided about the optical axis and boundary portions formed between two of the reflective surfaces adjacent to each other; and
a lens cap that covers the front side of the light source,
wherein the lens cap comprises a side lens portion that projects laterally emitted light from the light source toward the reflector,
wherein the laterally emitted light makes an angle with the optical axis that is at least a predetermined angle, and
wherein the side lens portion is divided into at least two lens elements in a circumferential direction around the optical axis, and refracts the laterally emitted light so that the laterally emitted light avoids the boundary portions,
wherein the lens cap further comprises a front lens portion that significantly diffuses forward emitted light emitted by the light source, in a horizontal direction as compared to in a vertical direction,
wherein the forward emitted light makes an angle with the optical axis that is less than the predetermined angle, and
wherein the front lens portion projects the forward emitted light forward.

11. The vehicle lamp according to claim 10 , wherein the side lens portion is a condensing lens that condenses the laterally emitted light in a direction perpendicular to the optical axis.

12. The vehicle lamp according to claim 11 , wherein the boundary portions are provided with ribs that protrude forward from the reflector.

13. The vehicle lamp according to claim 12 , wherein at least one of the lens cap and the reflector is fixed to a substrate on which the light source is mounted.

14. The vehicle lamp according to claim 11 , wherein at least one of the lens cap and the reflector is fixed to a substrate on which the light source is mounted.

15. The vehicle lamp according to claim 10 , wherein the boundary portions are provided with ribs that protrude forward from the reflector.

16. The vehicle lamp according to claim 15 , wherein at least one of the lens cap and the reflector is fixed to a substrate on which the light source is mounted.

17. The vehicle lamp according to claim 10 , wherein at least one of the lens cap and the reflector is fixed to a substrate on which the light source is mounted.

18. A vehicle lamp comprising:
a semiconductor light source disposed on an optical axis of the vehicle lamp;
a reflector comprising a plurality of reflective surfaces radially divided about the optical axis and boundary portions formed between two of the reflective surfaces adjacent to each other; and
a lens cap that covers the front side of the light source,
wherein the lens cap comprises a side lens portion that projects laterally emitted light from the light source toward the reflector,
wherein the laterally emitted light makes an angle with the optical axis that is at least a predetermined angle,
wherein the side lens portion is divided into at least two lens elements in a circumferential direction around the optical axis, and refracts the laterally emitted light so that the laterally emitted light avoids the boundary portions,
wherein the side lens portion comprises:
a plurality of lens elements divided in a circumferential direction around the optical axis, and
a plurality of steps formed between the plurality of lens elements,

wherein the side lens portion is disposed such that the lens elements are positioned at regions corresponding to the reflective surfaces of the reflector, and the steps are positioned at regions corresponding to the boundary portions of the reflector, and
wherein the side lens portion refracts the laterally emitted light such that the laterally emitted light avoids the boundary portions.

Assignees

• Sakashita Kazuhisa
• Koito Mfg Co Ltd

Inventors

• Sakashita Kazuhisa

Classifications

• F21S43/40

  characterised by the combination of reflectors and refractors · CPC title

• F21S43/31

  Optical layout thereof · CPC title

• F21S43/14 Primary

  Light emitting diodes [LED] · CPC title

• F21S43/26

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

• F21S48/215 Primary

  Mechanical Engineering · mapped topic