Industry Patents
Patent: 6603276
Dimming Control System with Distributed Command Processing
(Click image for PDF of full patent)
| Patent Number: |
6603276 |
| Title: |
Dimming Control System with Distributed Command Processing |
| Abstract: |
A dimming control system includes dimmer modules which receive dimming
level information from a control module. Each dimmer modules includes a
microprocessor which provides internal intelligence for controlling power
to a load in response to the dimming level information. The control module
receives industry standard protocol dimming information from various
sources, converts it to dimming level information, and communicates the
dimming level information to the dimmer modules through serial
communication lines. The dimmer modules and control module are mounted in
a rack which includes a backplane having nonvolatile memory device that
retains configuration data even if the control module is removed from the
rack. The dimmer modules implement a zero cross prediction method which
includes detecting an actual zero cross, calculating an error, and adding
the error to the period of a line power signal. The error is calculated by
applying a median filter to a plurality of previous error values,
discarding the highest and lowest values of the previous error values, and
averaging the remaining previous error values.
|
| Country of Issue: |
US |
| First Named Inventor: |
Chansky, Vannice, Le Vasseur |
| Assignee: |
Leviton |
| Continuation or Divisional of: |
6316889 |
| International Classification: |
H05B 37/02 |
| US Classification: |
315/362 |
| Issue Date: |
08-05-2003 |
| Filing Date: |
08-21-2001 |
| Application : |
09/935059 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
6603276 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
6603276 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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