Time division modulation with average current regulation for...

Transformer replacement for a solid-state lighting ballast

Transformerless electronic ballast for gaseous discharge lamps

Transistorized, voltage-controlled dimming circuit

Two-tone dimmer circuit

Ultraviolet fluorescent lamp with unique drive circuit

Ultraviolet lamp system and method for controlling emitted...

Uni-directional light emitting diode drive circuit in pulsed...

Uni-directional light emitting diode drive circuit in pulsed...

Unified 0-10V and DALI dimming interface circuit

Universal ballast control circuit

Universal electronic ballast for a family of fluorescent lamps

Universal fluorescent lamp ballast

Universal power supply for discharge lamps

Using a triangular waveform to synchronize the operation of...

Variable arc electronic ballast with continuous cathode heating

Variable frequency current control device for discharge lamps

Variable frequency current control device for discharge lamps

Variable intensity control apparatus for operating a gas dischar

Variable power control for OLED area illumination