questionswhat is the difference between lcd and led?

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@kamikazeken: Thanks for your professional interpretation, I a little understand. lOl

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(cont)
from wikipedia:

An LED-backlight LCD television is an LCD TV that uses LED backlighting instead of the CCFL used in traditional LCD televisions. It is not a true LED display but is called "LED TV" by some manufacturers.[1] The use of LED backlighting has a dramatic impact, resulting in a thinner panel, less power consumption and better heat dissipation, and a brighter display with better contrast levels.

The LEDs can come in three forms:

* Dynamic RGB LEDs which are positioned behind the panel
* White Edge-LEDs positioned around the rim of the screen using a special diffusion panel to spread the light evenly behind the screen (the most common)
* A full-array of LEDS which are arranged behind the screen but are incapable of dimming or brightening individually

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You are a bit confused...
you should be asking for the difference between LED and fluorescent LCD's.
both use LCD technology to create the image you see, the only difference is the light source.

regular led uses a fluorescent light to illuminate the screen, LED lcd uses led's as backligts, which typically use less electricity than traditional fluorescent LED displays

LED LCD's can be edge lit or backlit, with backlit typically being the better & more expensive of the two types of LED LCD's. The advantage being that a backlit LED LCD can turn off some of the LED lights sources if there is a black/dark area in the image on the screen.

both are more efficient than plasma or CRT displays. by a HUGE factor.

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@jeckyl913: In a sense, can I say LED is equal to LCD Principle at work? And are they both inefficient in terms of power utilization?

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LCD TV is also known as Liquid Crystal Display TV. From its name, it uses liquid crystal to produce images on the TV screen. Its thin layer of liquid crystal has tiny cells that produce pixels. As an electric current is applied, its rod shaped molecules respond by bending the light. LCD TVs are quite inefficient in terms of power utilization because the enormous mass of light that is being produced behind the screen is blocked before it reaches the person who is watching the television.

LED TVs also known as Light Emitting Diode on the other hand use backlighting technology with the use of LED. Its screen contains blue, red and green LEDs which lights up to produce the correct color. It has two types of backlighting technology: Edge Lighting and Full Array. Its backlighting technology makes it possible to consume 40% less power making it eco friendly.