Illumination device
AssigneeToyo Denso Kabushiki Kaisha
InventorKenjiro Nasu
Life of this patent
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Abstract
An illumination device suppresses a variation in color tone caused by a difference in optical path length from a light source without requiring a complicated manufacturing process. The illumination device includes: a single light source emitting monochromatic light; a light guide body transmitting the light emitted from the light source; a plurality of light emitting portions provided at positions having different optical path lengths from the light source, respectively, to transmit the light; and color conversion layers disposed between the light emitting portions and the light guide body to convert a color of the light transmitted through the light guide body.
Claims16
An illumination device comprising:
- a single light source emitting monochromatic light;
- a light guide body transmitting the light emitted from the light source;
- a plurality of light emitting portions provided at positions having different optical path lengths from the light source, respectively, to transmit the light;
- and
- color conversion layers disposed between the light emitting portions and the light guide body to convert a color of the light transmitted through the light guide body.
An illumination device comprising:
- a single light source emitting monochromatic light;
- a light guide body transmitting the light emitted from the light source;
- a light emitting portion including a plurality of regions continuously provided over a predetermined range for an optical path length from the light source to transmit the light;
- and
- color conversion layers disposed between the light emitting portion and the light guide body to convert a color of the light transmitted through the light guide body.
Dependencies are inferred from the claim text.