Industry Patents
Patent: 5629607
Initializing Controlled Transition Light Dimmers
(Click image for PDF of full patent)
| Patent Number: |
5629607 |
| Title: |
Initializing Controlled Transition Light Dimmers |
| Abstract: |
A light dimmer is provided in which semiconductor power devices for each of
the polarities of an alternating current supply are coupled between the
alternating current supply and a lamp load. In the course of varying
average power supplied to the lamp load, the semiconductor power devices
transition between an initial one and a subsequent other of substantially
conductive and non-conductive power conditions. The duration of the
transition by the power device is increased beyond the minimum possible
duration to reduce generated EMI. Methods of restoring each power device
to its initial condition, including during a subsequent half-cycle, are
described.
|
| Country of Issue: |
US |
| First Named Inventor: |
Callahan, Chester, Goddard |
| Assignee: |
|
| Continuation or Divisional of: |
5319301 |
| International Classification: |
G05F 1/00 |
| US Classification: |
323/237 |
| Issue Date: |
05-13-1997 |
| Filing Date: |
05-23-1995 |
| Application : |
448076 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
5629607 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
5629607 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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