Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type
Patent
1996-05-10
1998-04-21
Patel, Ashok
Electric lamp and discharge devices
With luminescent solid or liquid material
Solid-state type
313499, 362800, H01L 2313, H05B 3302
Patent
active
057421200
ABSTRACT:
An LED lamp allows the emitted LED light to be directed substantially in a desired direction. The LED lamp comprises an LED and a transparent housing for accommodating the LED. The transparent housing has a substantially semi-convex top formed with at least a total reflection plane. When the LED is placed at a specific position, part of the emitted LED light that strikes on the total reflection plane will be totally reflected from the total reflection plane. As a result, if the LED lamp is placed horizontally, as for example when mounted on an upright installed commercial sign, the emitted LED light rays will be virtually all directed at descending angles that allow people passing by the commercial sign to see the sign more clearly.
REFERENCES:
patent: 3676668 (1972-07-01), Collins et al.
patent: 3834883 (1974-09-01), Klein
patent: 5066889 (1991-11-01), Edwards
patent: 5289082 (1994-02-01), Komoto
Patel Ashok
Rebif Corporation
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