Industry Patents
Patent: 7639017
Method and Arrangement for Monitoring the Mercury Condensation in an Arc Tube
(Click image for PDF of full patent)
| Patent Number: |
7639017 |
| Title: |
Method and Arrangement for Monitoring the Mercury Condensation in an Arc Tube |
| Abstract: |
Methods for preventing blackening of a gas filled arc tube of a mercury
vapour discharge lamp. Lamp voltage and slope, as well as lamp current
and slope are analyzed to determine the state of mercury saturation of
the gas in the arc tube. A first control signal is sent to alter the lamp
power and a second control signal is sent to alter the level of cooling
of the lamp according to the state of mercury saturation. Methods for
driving a mercury vapour discharge lamp using a monitoring arrangement
and analyzing unit to dynamically control the lamp power and the level of
cooling of the lamp are described.
|
| Country of Issue: |
US |
| First Named Inventor: |
Pekarski |
| Assignee: |
Philips |
| Continuation or Divisional of: |
|
| International Classification: |
G01R 31/00 |
| US Classification: |
324/405 |
| Issue Date: |
12-29-2009 |
| Filing Date: |
12-21-2005 |
| Application : |
11/722806 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
7639017 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
7639017 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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