Tags: What | is | LED | TV | LED backlight TV | LED backlit display | LED TV technology

What Is LED TV?

Friday, 22 Oct 2010 09:56 AM

An LED TV belongs to the family of LCD TVs, and is not drastically different from the LCD TV. It is not a brand new breed of television.

What is an LED TV then? LED (Light Emitting Diode) refers to the backlight system of an LCD television. This essentially means that an LED TV is equal to a new and upgraded LCD TV.
Every LCD TV requires a source of light to illuminate its pixels, which generally happens to be a set of fluorescent tubes. In an LED television, the source is a series of LEDs instead of fluorescent tubes, i.e., the CCFLs (cold-cathode fluorescent lamps). Theoretically, take a flat-screen LCD TV to a workshop. Open it up. Take out all the fluorescent tubes and replace them with scintillating LEDs, and voila, you have just converted an LCD TV into an LED TV!
The CCFLs used in an LCD TV produce light and provide required illumination. But when they are replaced with LEDs, the LCD TV is referred to as an LED TV. An LCD TV (or an LED TV) is said to be backlit as the CCFLs (LEDs in the LED TV) are arranged to illuminate the screen from behind. This “backlit” setup allows the television to have specifically dimmed areas and specifically lit-up areas, depending on the specific LEDs that have been lit-up in the process. This generates a much superior dynamic contrast ratio as compared to the usage of fluorescent tubes, or CCFLs. Furthermore, LED televisions are extremely thin; some as thin as one inch!
There are two backlighting systems available in conventional LED televisions. The first one is “edge lighting.” In this system, a set of LEDs are attached along the outside edges or rim of the television and the light from these LEDs is dispersed across the screen. This technique allows the television to be made extremely thin.
The other method of backlighting is known as “full array.” In this method, many rows of LEDs are placed directly behind the screen surface. The biggest advantage of this mechanism is that it enables local dimming. “Local dimming” essentially means a specific set of LEDs that can be turned on and off independently. For viewers, this brings about a vivid contrast of light and darkness that enhances the visual effects on the screen. While most brands offer both types of LED TVs, some only manufacture a particular type.

© Newsmax. All rights reserved.

PLEASE NOTE: All information presented on Newsmax.com is for informational purposes only. It is not specific medical advice for any individual. All answers to reader questions are provided for informational purposes only. All information presented on our websites should not be construed as medical consultation or instruction. You should take no action solely on the basis of this publication’s contents. Readers are advised to consult a health professional about any issue regarding their health and well-being. While the information found on our websites is believed to be sensible and accurate based on the author’s best judgment, readers who fail to seek counsel from appropriate health professionals assume risk of any potential ill effects. The opinions expressed in Newsmaxhealth.com and Newsmax.com do not necessarily reflect those of Newsmax Media. Please note that this advice is generic and not specific to any individual. You should consult with your doctor before undertaking any medical or nutritional course of action.

Keeping you up to speed on Lifestyle, health, and money-saving tips
Get me on Fast Features
Keeping you up to speed on Lifestyle, health, and money-saving tips
Zip Code:
Privacy: We never share your email.
Follow Newsmax
Top Stories

Newsmax, Moneynews, Newsmax Health, and Independent. American. are registered trademarks of Newsmax Media, Inc. Newsmax TV, and Newsmax World are trademarks of Newsmax Media, Inc.

America's News Page
©  Newsmax Media, Inc.
All Rights Reserved