Led device and optical detector therewith for bill validator

Details Led device and optical detector therewith for bill validator Led device and optical detector therewith for bill validator

H - Electricity

01

L

H01L 33/48 (2010.01) G07D 7/12 (2006.01)

Patent

CA 2605190

An LED device is provided which comprises a plastic encapsulant 7 formed with an integrated cylindrical lens 8 disposed opposite to an LED chip 5 to provide light from LED chip 5 with the wider directivity angular range in the vertical Y irradiative direction than that in the horizontal X irradiative direction. When light from LED chip 5 is irradiated through cylindrical lens 8 out of plastic encapsulant 7, an outer surface of cylindrical lens 8 serves to transform light from LED chip 5 into a substantially parallel light beam which has a generally linear beam section wider in the directivity angular range of the necessary vertical Y irradiative direction, and narrower in the directivity angular range of the unnecessary horizontal X irradiative direction.

L~invention concerne un dispositif à diode électroluminescente qui comprend un encapsuleur plastique 7 formé avec une lentille cylindrique intégrée 8 disposée à l~opposé d~une puce de diode électroluminescente 5 pour donner une lumière provenant de la puce de diode électroluminescente 5 avec une plage angulaire de directivité supérieure dans la direction rayonnante verticale Y à celle dans la direction rayonnante horizontale X. Lorsqu~une lumière provenant de la puce de diode électroluminescente 5 est rayonnée par la lentille cylindrique 8 en dehors de l~encapsuleur plastique 7, une surface externe de la lentille cylindrique 8 sert à transformer la lumière provenant de la puce de diode électroluminescente 5 en un faisceau de lumière pratiquement parallèle qui a une section de faisceau généralement linéaire plus large dans la plage angulaire de directivité de la direction rayonnante verticale Y nécessaire, et plus étroite dans la plage angulaire de directivité de la direction rayonnante horizontale X non nécessaire.

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