Illumination – Revolving
Patent
1992-07-23
1994-01-04
Dority, Carroll B.
Illumination
Revolving
362 27, F21V 704
Patent
active
052765911
ABSTRACT:
An illuminated sign system using high brightness LEDs and a translucent graphic panel with suitable opacity for the transmission of light. The graphic panel is illuminated by light from the LEDs which is injected into the edge of the graphic panel causing graphics applied to a surface of the graphic panel to become illuminated. Although LEDs produce a very narrow beam of light, uniform lighting of the graphic panel is possible due to the efficient internal reflection of light that occurs within the translucent graphic panel. Light injected into the edge of the graphic panel is efficiently diffused without the uses of a diffusing sheet between the LEDs and the graphic panel. Unlike illuminated signs of illumination that use LEDs for direct illumination of a graphic panel, the invention produces an equivalent level of graphic brightness while requiring fewer LEDs.
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