Sep 1 2010, 01:36 PM
the LED is just the BACKLIGHT, the display is still LCD..
conventional LCD uses cathode, whereas the new models uses LED..
see the image below
CCFL Backlight
LED Backlight
and here..
http://en.wikipedia.org/wiki/LED-backlit_LCD_television
QUOTE
LED-backlit LCD TVs differ from conventional CCFL-backlit LCD TVs in the following:
They can produce an image with greater dynamic contrast compared with CCFL-backlit LCD TVs.[6]
With Edge-LED lighting they can be extremely slim. Current models on the market can be approximately one inch thick.[6]
They can offer a wider color gamut, especially when RGB-LED backlighting is used. [7]
Lesser environmental pollution on disposal.[6]
Higher cost due to current market product placement.[6]
Generally have a lower power consumption in the realm of 20-30%.[6]
BUT, watch out for this..They can produce an image with greater dynamic contrast compared with CCFL-backlit LCD TVs.[6]
With Edge-LED lighting they can be extremely slim. Current models on the market can be approximately one inch thick.[6]
They can offer a wider color gamut, especially when RGB-LED backlighting is used. [7]
Lesser environmental pollution on disposal.[6]
Higher cost due to current market product placement.[6]
Generally have a lower power consumption in the realm of 20-30%.[6]
QUOTE
Flicker due to backlight dimming
LED backlights are often dimmed by applying pulse-width modulation to the supply current, effectively switching the backlight off and on again very quickly. A screen with an LED backlight dimmed this way will therefore flicker. If the frequency of the pulse-width modulation is too low and or the user is very sensitive to flicker, this may cause discomfort and eye-strain, similar to the flicker of CRT displays
This post has been edited by kevin613: Sep 1 2010, 01:42 PMLED backlights are often dimmed by applying pulse-width modulation to the supply current, effectively switching the backlight off and on again very quickly. A screen with an LED backlight dimmed this way will therefore flicker. If the frequency of the pulse-width modulation is too low and or the user is very sensitive to flicker, this may cause discomfort and eye-strain, similar to the flicker of CRT displays
Quote
0.0162sec
0.64
6 queries
GZIP Disabled