US 2010/0135036 A1Published application

Vehicle lighting device

AssigneeHarison Toshiba Lighting Corp.

InventorsYoshiaki Matsuba, Yuji Wagatsuma, Takeo Kato

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Abstract

An optical axis O′ of a lens section of an optical member is inclined downward relative to a horizontal direction (an optical axis O of each LED) from a light emitting section of each LED. Therefore, an area at and below a horizontal position of a lighting device is illuminated by the lens section while each LED is arranged at an optically ideal position relative to the lens section. Also, reflection surfaces of upper and lower reflector sections and of the optical member are respectively set based on parabolas P1 and P2 different from each other with focal points F1 and F2 positioned at each LED. Therefore, the area at and below the horizontal position of the lighting device is illuminated respectively by the reflector sections while each LED is arranged at an optically ideal position relative to the reflector sections.

Claims5

Dependent claims

A vehicle lighting device comprising a light source whose optical axis is set in a horizontal direction, and an optical member configured to control emitted light from the light source,

wherein the optical member comprises:
a lens section provided on the optical axis of the light source and configured to emit incident light from the light source by changing the incident light by refraction;
an upper reflector section integrated with the lens section and made of a light transmissive material, and configured to emit incident light from the light source by totally reflecting the incident light at an upper reflection surface formed above the lens section;
and
a lower reflector section integrated with the lens section and made of a light transmissive material, and configured to emit incident light from the light source by totally reflecting the incident light at a lower reflection surface formed below the lens section,
an optical axis of the lens section being inclined downward relative to the horizontal direction from the light source,
the upper reflection surface being an aspheric surface with a focal point positioned at the light source or vicinity of the light source, and
the lower reflection surface being an aspheric surface different from the upper reflection surface with a focal point positioned at the light source or vicinity of the light source.

5 more elements

Dependencies are inferred from the claim text.