Quote:
Originally Posted by ClearToLand 
SUBJECT: A LED HDTV is Really a LCD HDTV with a LED Backlight...
For everyone's information, a:
.
AFAIK (I discontinued my research after purchasing my 37" Panasonic LCD HDTV in DEC 2011), *ONLY* the best of the First Tier LED HDTVs have full LED backlighting (I can't remember the proper term - you can GOOGLE it or visit the AVS LCD HDTV forum if you want to learn more
). This allows the set to specifically turn off blocks of LEDs to improve the Black Level in dark areas of the screen rather than just 'attempt' to control it with the LCD pixels alone. The majority of the LED HDTVs are 'Edge-Lit' - the examples I saw in 'drawn figures' (i.e. not actual pictures), had LEDs only at the sides of the screen, with fiber optic light tubes re-directing the emitted light to behind the LCD.
The difference in quality (between fluorescent LCD and edge-lit LED LCD) would be more due to the improvement in the LCD screen technology than the type of backlight used.

SUBJECT: A LED HDTV is Really a LCD HDTV with a LED Backlight...
For everyone's information, a:
.
- LCD HDTV has a LCD screen with a CCFL or EEFL (fluorescent) backlight.
. - LED HDTV has a LCD screen with a LED (light emitting diode) backlight.
AFAIK (I discontinued my research after purchasing my 37" Panasonic LCD HDTV in DEC 2011), *ONLY* the best of the First Tier LED HDTVs have full LED backlighting (I can't remember the proper term - you can GOOGLE it or visit the AVS LCD HDTV forum if you want to learn more
). This allows the set to specifically turn off blocks of LEDs to improve the Black Level in dark areas of the screen rather than just 'attempt' to control it with the LCD pixels alone. The majority of the LED HDTVs are 'Edge-Lit' - the examples I saw in 'drawn figures' (i.e. not actual pictures), had LEDs only at the sides of the screen, with fiber optic light tubes re-directing the emitted light to behind the LCD.The difference in quality (between fluorescent LCD and edge-lit LED LCD) would be more due to the improvement in the LCD screen technology than the type of backlight used.
It's called full-array led backlighting with local dimming. Sometimes yields haloing artifacts on poorer implementations.




























