Industry Patents
Patent: 8816593
Method and Apparatus Selectively Determining Universal Voltage Input for Solid State Light Fixtures
(Click image for PDF of full patent)
| Patent Number: |
8816593 |
| Title: |
Method and Apparatus Selectively Determining Universal Voltage Input for Solid State Light Fixtures |
| Abstract: |
A device for detecting a dimmer phase angle set by operation of a dimmer
for a solid state lighting load includes a processor having a digital
input, a first diode connected between the digital input and a voltage
source and a second diode connected between the digital input and ground.
The device further includes a first capacitor connected between the
digital input and a detection node, a second capacitor connected between
the detection node and ground, and a resistance connected between the
detection node and a rectified voltage node, which receives a rectified
voltage from the dimmer. The processor is configured to sample digital
pulses at the digital input based on the rectified voltage and to
identify the dimmer phase angle based on lengths of the sampled digital
pulses.
|
| Country of Issue: |
US |
| First Named Inventor: |
Lys, Datta, Campbell |
| Assignee: |
Philips |
| Continuation or Divisional of: |
|
| International Classification: |
H05B 41/36 |
| US Classification: |
315/200 R |
| Issue Date: |
08-26-2014 |
| Filing Date: |
04-13-2010 |
| Application : |
13/509863 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
8816593 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
8816593 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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