Burst dimming is a method to control dimming of
cold cathode fluorescent lamps (CCFLs) and
LED
A light-emitting diode (LED) is a semiconductor Electronics, device that Light#Light sources, emits light when Electric current, current flows through it. Electrons in the semiconductor recombine with electron holes, releasing energy i ...
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, part of the sensory nervous system, that reacts to visible light and allows humans to use visual information for various purposes including seeing things, keeping balance, and maintaining circadian rhythm.
...
.
[{{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). As LCDs do not produce light by themselves—unlike, for example, cathode ray tube (CRT), plasma (PDP) or OLED displays—they need illumination ( ambient light or a s ...
. An alternative dimming method is to control lamp current.
References
Display technology
Lighting
Liquid crystal displays