Patent · US Expired

Circuit arrangement and method for an illumination device having settable color and brightness

US7049769B2 · kind B2 · utility

7Cited by

3References

16Claims

0Family size

Assignee

Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · DE

Inventors

Mourad Boulouednine · Schwanau, DE
Alexander Faller · Dachau, DE

Key dates

Filing date	Jan 29, 2004
Grant date	May 23, 2006
Priority date	—
Expiry date	Jan 29, 2024

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02B20/30
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

It is intended to be possible to use a respective setting apparatus (E1, E2) to set the color and the brightness of an illumination device separately. Light sources having three different colors are operated for this purpose. Only one first power supply (CON, PWM1) is provided for two colors, whereas the third color is supplied by a second power supply (CON, PWM2). The brightness can be set by altering the power output of the first (CON, PWM1) and the second (CON, PWM2) power supplies at the same time. The color can be set by altering the power output of the second (CON, PWM2) power supply.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.