09-11-2010 11:07 PM
If we want to be technical, LED TVs are in fact LCD displays. The main difference between LED and LCD TVs is the backlighting method. LED TVs use individual LED bulbs to provide the backlighting (usually local dimming), whereas regular LCD displays use the CCFL(Cold Cathode Fluorescent Lamp) method.
As far as quality of image is concerned, LED TVs will always beat regular LCD displays. LED displays, especially ones that use local dimming, are able to turn off or dim in specific areas on the TV helping to maximize the dynaimic contrast in the images displayed, making the blacks on the screen truly black, because there is no light being provided from the LEDs. They also individually brighten as needed to help make things brighter where they need to be, thus helping to maximze that contrast.
This is different from CCFL LCD displays, where the backlighting literally is done in rows of lights that dim or brighten as necessary, but can't dim/brighten in specific areas on the TV. This makes for a lower DCR, especially when compared to LED displays. For example, I have a LCD display with 50 000:1 DCR vice a LED display with 5 000 000:1 DCR.
To make a long story short, if you are looking for quality, go with LED. But that quality comes with a price, so come expecting to spend.
Hope that helps!
09-12-2010 03:46 PM - edited 09-12-2010 03:59 PM
Its just a difference in back lighting, as both are still considered "LCDs". Traditional LCDs have CCFL back lighting while LED LCDs make use of LEDs in either a EDGE lit or BACK lit layout. The latter is the preferable one (especially those that have local dimming) as it offers a noticeably better picture quality over CCFL lcds as well as vastly superior screen uniformity over EDGE lit leds. However that does not mean all CCFL LCDs are inferior. The Samsung C750 is an example of an LCD which outperforms many EDGE lit LEDs and is without doubt a great value when compared to EDGE lit leds in terms of picture quality.
Excluding plasmas, if you want the best value for your money and are on a budget, then a CCFL LCD should be more than adequate (i.e. Samsung C6XX/C750). However if you are willing to spend more for an LED, then i would strongly recommend that you go for the best and get a BACK lit LED with local dimming (i.e. Sony HX909/XBR12, LG LE8500/LX9500 or Vizio clones).
09-18-2010 06:09 AM
CXZ is absolutely right.
Local-dimming is all about getting deeper blacks for better viewing in dark rooms, but if that's your main concern, you might want to consider a Plasma TV. Plasma TVs naturally excell in dark rooms.