Industry Patents
Patent: 7482760
Methods and Apparatus For Scaling the Average Current Supply to Light-Emitting Elements
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| Patent Number: |
7482760 |
| Title: |
Methods and Apparatus For Scaling the Average Current Supply to Light-Emitting Elements |
| Abstract: |
The present invention provides a method and apparatus for scaling the
average drive current supplied to a light-emitting element or string
thereof by coupling a scaling signal to an original control signal
thereby generating an effective control signal for control of the
light-emitting element(s). The scaling signal can be a modulated signal,
for example a Pulse Width Modulation (PWM) signal, Pulse Code Modulation
(PCM) signal, or other signal and modifies the original control signal to
produce an effective control signal. The effective control signal is
subsequently used to control the supply of power to the light-emitting
element(s) from a power source via a switching device. The effective
control signal essentially modifies the ON time of the light-emitting
element(s), thereby modifying the average drive current passing through
the light-emitting element(s). The scaling signal is coupled to the
original control signal by a coupling mechanism, thereby enabling the
modification of the original control signal by the scaling signal forming
the effective control signal.
|
| Country of Issue: |
US |
| First Named Inventor: |
Jungwirth, Toma |
| Assignee: |
TIR Technology |
| Continuation or Divisional of: |
|
| International Classification: |
H05B 37/00 |
| US Classification: |
315/185 |
| Issue Date: |
01-27-2009 |
| Filing Date: |
08-05-2005 |
| Application : |
11/198248 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
7482760 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
7482760 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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