Low power drain illuminated sign

Details Low power drain illuminated sign Low power drain illuminated sign

1993-10-12

1995-09-12

Green, Brian K.

Card, picture, or sign exhibiting

Illuminated sign

Lamp box

40550, 40581, 362347, 362812, G09F 1304

Patent

active

054488435

ABSTRACT:
An illuminated sign apparatus comprised of a reflector with dedicated cavities which are formed by having the perimeter walls of each cavity conform precisely to each individual area of the sign desiring illumination, typically alphabetic characters and the background area they create. The bottom walls of these cavities will project towards the viewers eye parabolically. The midpoint of the cavity, when viewed in cross section, is to be slightly less in height than that of the cavity-defining perimeter walls. The perimeter walls have point source lights such as light emitting diodes (LEDs) distributed along their surface. These cavities may be filled in with transparent substance, fully encapsulating the LEDs thereby eliminating any reflective air space and facilitating light diffusion. The light sources may be provided with circuitry allowing unique powering to each of the individual cavities, resulting in the possibility of a variety of different display effects.

REFERENCES:
patent: 796475 (1905-08-01), Turner
patent: 4028828 (1977-06-01), Chao et al.
patent: 4259800 (1981-04-01), Schoenfeld
patent: 4967317 (1990-10-01), Plumly
patent: 5186537 (1993-02-01), Katoh et al.

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