Industry Patents
Patent: 7940007
Plasma Lamp with Dielectric Waveguide Integrated With Transparent Bulb
(Click image for PDF of full patent)
| Patent Number: |
7940007 |
| Title: |
Plasma Lamp with Dielectric Waveguide Integrated With Transparent Bulb |
| Abstract: |
A dielectric waveguide integrated plasma lamp (DWIPL) with a body
comprising at least one dielectric material having a dielectric constant
greater than approximately 2, and having a shape and dimensions such that
the body resonates in at least one resonant mode when microwave energy of
an appropriate frequency is coupled into the body. A dielectric bulb
within a lamp chamber in the body contains a fill which when receiving
energy from the resonating body forms a light-emitting plasma. The bulb
is transparent to visible light and infrared radiation emitted by the
plasma. Radiative energy lost from the plasma is recycled by reflecting
the radiation from thin-film, multi-layer coatings on bulb exterior
surfaces and/or lamp chamber surfaces back into the bulb. The lamp
further includes two- or three-microwave probe configurations minimizing
power reflected from the body back to the microwave source when the
source operates: (a) at a frequency such that the body resonates in a
single mode; or (b) at one frequency such that the body resonates in a
relatively higher mode before a plasma is formed, and at another
frequency such that the body resonates in a relatively lower order mode
after the plasma reaches steady state.
|
| Country of Issue: |
US |
| First Named Inventor: |
Chang, Espiau |
| Assignee: |
Luxim |
| Continuation or Divisional of: |
7429818 |
| International Classification: |
H05B 37/00 |
| US Classification: |
315/39 |
| Issue Date: |
05-10-2011 |
| Filing Date: |
09-11-2008 |
| Application : |
12/209042 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
7940007 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
7940007 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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