Transistorized, voltage-controlled dimming circuit

Details Transistorized, voltage-controlled dimming circuit Transistorized, voltage-controlled dimming circuit

2005-04-05

2008-12-09

Vu, David Hung (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

C315S310000, C315S2090SC, C315S119000

Reexamination Certificate

active

07462995

ABSTRACT:
A system includes a switching transistor that provides a current source to a load when activated by an input voltage and at least one Zener diode connected in parallel with the load that acts as a shunt regulator. The system may be especially suited for matching the controlled luminance of light emitting diodes to the controlled luminance of incandescent lighting. The system may also be useful for displays where a single master voltage regulator switch or controller controls the different types of lighting. The system may be packaged in a chip scale package for compactness, reduced weight, cost effectiveness, and higher efficiency and reliability.

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Paul Greenland and Werner Bernsns, Powering Next-Generation Solid State Lighting, Power Electronics Technology, May 2004, Santa Clara, California and Fuerstenfeldbruck, Germany; article was found online at powerelectronics.com.

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