A method for driving an electroluminescent lamp to emit light at a brightness set level includes providing a variable bias voltage to the electroluminescent lamp. The variable bias voltage is increased with the duration of the on-time of the electroluminescent lamp. To stabilize the electroluminescent lamp at the brightness set level against aging, a closed loop control of the brightness of the electroluminescent lamp is applied, which is subject to said duration of the on-time the electroluminescent lamp.

 
Web www.patentalert.com

< Discharge lamp with specific amounts of halogen, oxygen, hydrogen and carbon

< Atomic absorption spectrophotometer

> Electronic ballast for a discharge lamp

> Lighting apparatus and projection type display, and driving method therefore
~ 00277