Molded LED indicator

Details Molded LED indicator Molded LED indicator

1978-03-16

1979-05-01

Demeo, Palmer C.

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

313512, 357 72, H05B 3306, H05B 3322

Patent

active

041526244

ABSTRACT:
An LED device of the discrete type having a rectangular light emitting area suited for being arrayed with similar devices in contiguous relationship without optical cross-talk therebetween. An opaque but diffusely reflective housing of the device is molded of synthetic resin material with rectangular integral side walls defining a rectangular body. Their interior surfaces have peripheral upper and lower edges defining a principal cavity having a rectangular top opening. A pair of spaced electrodes extend through a bottom opening and have upper portions extending up into the cavity and there terminating so as to provide an electrode surface area below the top opening having a specularly reflective LED-containing cavity formed therein. An LED die within the electrode cavity is series-connected with the electrodes. Sloped inner walls of the body provide nonspecular reflection of light emitted from the LED. The principal cavity is filled with a synthetic resin material including dispersed light scattering particles. The construction results in a uniformly illuminated light-emitting area of arrayable rectangular format nearly as large as the top of the device.

REFERENCES:
patent: 3764862 (1973-10-01), Jankowski
patent: 3780357 (1973-12-01), Haitz
patent: 4000437 (1976-12-01), Lederhandler et al.

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