LED Driver Training Jun 05 CN TWLED Drivers June 2005 optical power management interface How Light Emitting Diodes Work Holes (Lower Energy) + Electrons (Higher Energy) Release Photon Light Beam optical power management interface Things you need to know about LED LED brightness is proportional to forward current Forward Voltage Changes from LED to LED For a given LED, forward voltage is proportional to forward current The purpose of having LED driver is to provide a constant current source It is difficult to match LEDs for equal brightness As LED technology improves, forward voltages are dropping optical power management interface Ultra Bright LED Applications LCD backlighting Flashlights Signs Outdoor landscape lighting Gaming machines LCD TV Consumer audio products White goods Home in……