Industry Patents
Patent: 5323088
Dimming Control Circuit
(Click image for PDF of full patent)
| Patent Number: |
5323088 |
| Title: |
Dimming Control Circuit |
| Abstract: |
A dimming control circuit for a plurality of lighting fixtures includes a
separate semiconductor power switch, e.g., a silicon-controlled rectifier
or SCR, for providing controlled amounts of pulsed, unidirectional
electrical current to each lighting fixture. In one embodiment, a pair of
SCRs, arranged in parallel, opposed relationship, are controllably pulsed
to produce an alternating sequence of positive and negative electrical
current pulses, of independently-controlled duration, and
oppositely-conducting diodes then connect these SCRs to two separate
lighting fixture. One such lighting fixture thus receives the positive
current pulses, and the other such lighting fixture thus receives the
negative current pulses. In an alternative embodiment, each lighting
fixture receives pulsed, unidirectional current directly from a separate,
independently-controlled SCR.
|
| Country of Issue: |
US |
| First Named Inventor: |
Cunningham |
| Assignee: |
Esakoff |
| Continuation or Divisional of: |
|
| International Classification: |
G05F 1/00 |
| US Classification: |
315/195 |
| Issue Date: |
06-21-1994 |
| Filing Date: |
05-11-1993 |
| Application : |
63839 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
5323088 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
5323088 at Google Patents |
1. The Google Patents and World Patent Family links will likely not work until a few weeks
after the patent has issued - they take a while to get new patents in their systems.
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