Lighting apparatus for vehicle

Patent metadata

Field	Value
Publication number	US-9970616-B2
Application number	US-201615203477-A
Country	US
Kind code	B2
Filing date	Jul 6, 2016
Priority date	Mar 7, 2016
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

A lighting apparatus for a vehicle may include a light source unit comprising at least two light sources emitting polarized beams in different directions, a filter configured to receive the emitted polarized beams, reflect one of the polarized beams, and transmit another of the polarized beams, and an emitter configured to receive the polarized beams from the filter, and emit the received polarized beams as light of a predetermined color.

First claim

What is claimed is:

1. A lighting apparatus for a vehicle comprising:
a light source unit comprising at least two light sources emitting polarized beams;
a filter configured to receive the emitted polarized beams, reflect a first beam of the polarized beams, and transmit a second beam of the polarized beams; and
an emitter configured to receive the polarized beams from the filter, and emit the received polarized beams as light of a predetermined color,
wherein
the at least two light sources comprise a first light source and a second light source;
the first light source is configured to emit at least one of a longitudinal and a lateral polarized beam; and
the second light source is configured to emit at least one of a lateral and a longitudinal polarized beam having a polarization direction different from a polarization direction of the polarized beam emitted by the first light source,

wherein the first light source is configured to emit the lateral polarized beam, and the second light source is configured to emit the longitudinal polarized beam, and
wherein
the first and second light sources are disposed to have an angle difference of 90° between each other; and
the polarized beams of the first and second light sources have a phase difference of 90°.

2. The lighting apparatus according to claim 1 , wherein
the filter is spaced apart a predetermined distance from the light source unit; and
the filter comprises:
a polarization filter to reflect the lateral polarized beam and transmit the longitudinal polarized beam; and
a mirror to reflect the longitudinal polarized beam toward the polarization filter.

3. The lighting apparatus according to claim 2 , wherein, in the filter, the polarization filter receiving the polarized beam of the first light source is disposed over the reflecting mirror receiving the polarized beam of the second light source, and the emitter is disposed over the polarization filter, so the polarized beams of the first and second light sources are incident upon the emitter through the polarization filter and the reflecting mirror.

4. The lighting apparatus according to claim 2 , wherein
the light source unit further comprises a condensing lens unit disposed in front of the light source unit for focusing the polarized beams emitted from the light source unit on a focal point; and
the emitter is disposed at a position corresponding to the focal point, on which the polarized beam emitted from the second light source is focused after being reflected through the reflecting mirror.

5. The lighting apparatus according to claim 1 , wherein the beams emitted by the emitter illuminate front and rear of the vehicle through at least one of a reflector and a lens.

6. The lighting apparatus according to claim 1 , further comprising a housing having an inner space, wherein
the light source unit is disposed at a supporter which is disposed at a first side of the inner space;
the filter is disposed at a second side opposite to the first side and is disposed in line with and spaced apart from the light source unit; and
the emitter is positioned at an upper end of the housing and disposed over the filter.

Assignees

• Hyundai Motor Co Ltd

Inventors

• Ahn Byoung Suk
• Shin Jik Soo
• Jin Keon Soo
• Na Jin Ho
• Lee Ki Hong

Classifications

• F21S41/32

  Optical layout thereof · CPC title

• F21S41/141

  Light emitting diodes [LED] · CPC title

• F21V9/14

  for producing polarised light · CPC title

• H01S5/4012

  Beam combining, e.g. by the use of fibres, gratings, polarisers, prisms · CPC title

• F21V9/30

  Elements containing photoluminescent material distinct from or spaced from the light source (shades F21V1/17; globes, bowls or cover glasses F21V3/08, F21V3/12; refractors F21V5/10; reflectors F21V7/26, F21V7/30; elements with provision for controlling the spectral properties or intensity F21V9/40) · CPC title