Automotive headlamps with improved beam chromaticity

Details Automotive headlamps with improved beam chromaticity Automotive headlamps with improved beam chromaticity

F - Mech Eng,Light,Heat,Weapons

21

S

F21S 8/10 (2006.01) B60Q 1/00 (2006.01) B60Q 1/04 (2006.01)

Patent

CA 2540700

Lenses for lamps can improve the quality of the light emitted through lens by interacting with the light bulb. Photoluminescent dyes as well as non~photo] uminescent dyes may be incorporated into a polycarbonate lens (23) in order to shift the chromaticity of the light source. Further, design features such as grooves or protrusions (30) may be incorporated into the lens (23) to allow light produced by the photo] uminescent material to escape the lens (23) and be added to the emitted beam to further shift the chromaticity. The emitted beam is of a legal color and intensity as defined per applicable standards. The lighting performance may also be improved in such manner as reducing discomfort glare, increasing brightness or producing a beam that enhances road visibility at night to the human eye.

Selon l'invention, des lentilles de phares peuvent améliorer la qualité de la lumière émise à travers une lentille par interaction avec l'ampoule. Des colorants photoluminescents ou non photoluminescents peuvent être incorporés dans une lentille polycarbonate (23) pour modifier la chromaticité de la source de lumière. Par ailleurs, des particularités techniques telles que des rainures ou des parties saillantes (30) peuvent être incorporées dans la lentille (23) pour que la lumière produite par le matériau photoluminescent puisse sortir de la lentille (23) et être ajoutée au faisceau émis afin de modifier davantage la chromaticité. Le faisceau émis présente une couleur et une intensité réglementaires conformément aux normes en vigueur. Les performances d'éclairage peuvent également être améliorées de façon à réduire l'éblouissement, augmenter la luminosité ou produire un faisceau améliorant la visibilité nocturne de la route pour l'oeil humain.

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