Illumination – Plural light sources – With modifier
Patent
1990-10-23
1992-03-03
Lazarus, Ira S.
Illumination
Plural light sources
With modifier
362237, 362240, 362297, 362346, 362800, 313114, 313512, F21V 100
Patent
active
050937685
ABSTRACT:
An improved signal lamp for a vehicle is composed of a plurality of dome type light emitting diodes and a plurality of reflective mirrors arranged corresponding to the light emitting diodes. Each of the reflective mirrors is designed in the shape of a rotational parabolic surface whose focus is located at the position coincident to the foremost end of the corresponding light emitting diode or at the position in the vicinity of the foremost end of the corresponding light emitting diode. The rotational parabolic surface is configured such that a virtual light source appearing on each light emitting diode is located at the position coincident with the focus of the corresponding reflective mirror or at the position in the vicinity of the focus of the corresponding reflective mirror. Each light emitting diode chip is sealably received in a transparent cylindrical case molded of synthetic resin such that a large part of light generated by the light emitting diode chip is emitted directly from the light emitting diode chip so as to allow it to be radiated to the outside through the lens portion at a radiating angle ranging from 10.degree. to 12.degree. as measured from the optical axis.
REFERENCES:
patent: 3875456 (1975-04-01), Kano et al.
patent: 4013915 (1977-03-01), Dufft
patent: 4603496 (1986-08-01), Latz et al.
patent: 4628422 (1986-12-01), Ewald
patent: 4698730 (1987-10-01), Sakai et al.
patent: 4742432 (1988-05-01), Thillays et al.
Hagarman Sue
Lazarus Ira S.
Stanley Electric Co. Ltd.
Weinstein Louis
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