Sign with indirect illumination from light emitting diodes
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 4, 1994
Grant Date -
N/A
app pub date -
Jul 23, 1992
filing date -
Jul 23, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully