VEHICLE SIGN DISPLAY EMPLOYING SEMICONDUCTOR LIGHTING ELEMENTS
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United States of America Patent
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N/A
Issued Date -
N/A
app pub date -
May 20, 2013
filing date -
May 20, 2013
priority date (Note) -
Published
status (Latency Note)
Importance
Abstract
An illuminated electronic display sign suitable for a transit vehicle comprises a support frame with a mounting surface, a plurality of lighting elements disposed on or attached to the mounting surface, and electronic circuitry configured to provide commands to selectively illuminate the lighting elements so as to create text or other information thereon. The lighting elements each comprise a semiconductor-based light source and an optical cap, each having a transparent layer portion and a diffusion layer portion. The optical caps may be generally rectangular in shape, aligned in a two-dimensional grid having rows and columns and are substantially adjacent to one another, with narrow gaps therebetween for increased display area. The optical caps may be asymmetrical, with a flat upper portion and a gradually tapering top surface to help reduce glare. A control system including wireless circuitry may be used to control multiple electronic display signs.
First Claim
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