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1. (WO1998053646) AN ILLUMINATION DEVICE USING PULSE WIDTH MODULATION OF A LED

Pub. No.:    WO/1998/053646    International Application No.:    PCT/US1998/010531
Publication Date: Fri Nov 27 00:59:59 CET 1998 International Filing Date: Sat May 23 01:59:59 CEST 1998
IPC: A61B 5/00
H05B 33/08
Applicants: SCHMIDT, Gregory, W.
Inventors: SCHMIDT, Gregory, W.
Title: AN ILLUMINATION DEVICE USING PULSE WIDTH MODULATION OF A LED
Abstract:
An illumination device (200) utilizing a pulse modulation technique of a solid state light source to provide increased light output for a given heat load. The power is supplied by the pulse generator (225) in pulses to periodically activate a short wavelength emitting LED (230), which in turn stimulates a phosphor-based color conversion system to produce sustained white light.