Burst dimming is a method to control dimming of cold cathode fluorescent lamps (CCFLs) and

LED A light-emitting diode (LED) is a semiconductor device that emits light when current flows through it. Electrons in the semiconductor recombine with electron holes, releasing energy in the form of photons. The color of the light (corresp ...

s by using pulse width modulation (PWM) at approximately 100-300 Hz which is supposed to be above the noticeable flicker limit for the

human eye The human eye is a sensory organ in the visual system that reacts to light, visible light allowing eyesight. Other functions include maintaining the circadian rhythm, and Balance (ability), keeping balance. The eye can be considered as a living ...

. {{cite web, title=Electrical Engineering Glossary Definition for Burst Dimming - Maxim/Dallas, url=http://www.maxim-ic.com/glossary/index.cfm/Ac/V/ID/998/Tm/Burst-Dimming 070925 maxim-ic.com This technique is sometimes used with TFT displays to control

backlighting A backlight is a form of illumination used in liquid-crystal displays (LCDs) that provides light from the back or side of a display panel. LCDs do not produce light on their own, so they require illumination—either from ambient light or a de ...

. An alternative dimming method is to control lamp current.

References

Display technology Lighting Liquid crystal displays