Q.
A. LED TV Technology is a relatively new feature in the world of HD Television. They are thinner and have a better definition display than typical LCD TVs that use fluorescent lamps as a light source. The hype surrounding this new technology has resulted in Samsung selling approx one million LED TVs worldwide in 6 months.
However LED televisions are not technically that different from conventional the LCD TVs that have been with us for the last few years. In fact the term �LED TV� has been questioned as an LED TV is just a liquid-crystal display TV that uses light-emitting diodes to light the screen. Britain�s Advertising Standards Authority recently had problems with some marketing of LED TVs. The ASA said that the term LED TV is merely a variation of LCD TV and was misleading. As a result clarification relating to the use of the LEDs as the light source is now used when advertising LED Televisions.
Other television manufacturers have also come out and said that rather than LED TV it should be called an �LED-lit LCD TV� as this more accurately describes the use of LED technology used in these TV sets.
Up to now Sony, Samsung, Philips, JVC and LG have LED TVs on the market. The plus points with these new sets are that they have better picture quality, are thinner and are more eco-friendly mainly due to reduced energy consumption. On the negative side, as is to be expected with any new technology their price tag is still a bit on the hefty side.
The LED lighting in these new set is employed in one of two ways either as edge-lit LED TV or backlit LED TV. Edge-lit televisions as you have probably guessed have the LED lighting situated around the edge of the screen. Without the larger fluorescent lighting previously used at the back of the TV, LED models have been reduced in thickness with Sony producing an LED display less than 1cm thick and Samsungs sets measuring in at 3cm thick.
LED TV technology has made great advances with energy efficiency. Compared to their equivalent conventional LCD Television models, LED HDTVs use typically 40% less energy. And when compared to plasma TVs they can be 50% more efficient. The improved energy efficiency is due to the fact that LEDs require less power to illuminate the screen than fluorescent lights used in older LCD screens.
SONY BRAVIA XBR8 LCD flat panel HDTV. In addition to Full HD 1080p, this XBR-8 Series TV features TRILUMINOS RGB Dynamic LED backlight which produces breathtaking images with enhanced color purity that result in deep blacks and bright whites with startling depth and exceptional shadow detail. You'll also see the difference with Motionflow 120Hz PRO technology which enhances motion and delivers a smoother and clearer picture. Your 1080p HD images will look more breathtaking than ever thanks to the BRAVIA Engine 2 PRO fully digital video processor. This XBR-8 Series TV has DMex functionality which lets you expand the capabilities of your HDTV by adding optional BRAVIA Link modules (sold separately), plus it comes with plenty of connectivity options to connect your video sources.
Technical Details
* TRILUMINOS RGB Dynamic LED backlight produces incredible 1,000,000:1 dynamic contrast ratio in an LCD panel
* New: TV Guide IPG
* New: Enhanced (XMB) User Interface with Rich 3D Graphics
* New: DLNA Compliant
* New: Digital Media Port
* 16:9 Full HD 1080p Resolution Panel (1920 x 1080p)
* BRAVIA Engine fully digital video processor
* Advanced Contrast Enhancer circuit (ACE)
* 24p True Cinema capable
* Emmy-award winning Xross Media Bar user interface
* DMeX capable
* BRAVIA Sync capable
* S-Force Front Surround Voice Zoom
* Robust Connectivity with 4 HDMI inputs, 2 HD Component inputs, and a PC Input
* Piano Gloss Black with Onyx Speaker Grille
* Remote: RM-YD023
TRILUMINOS RGB Dynamic LED Backlight
TRILUMINOS RGB LED backlight technology aligns individual clusters of red, green, and blue LEDs to produce a significantly higher purity of primary colors than single white LED backlights, resulting in more accurate color reproduction. This clustered arrangement also allows the XBR8 to adjust the brightness of the backlight in units of small blocks, so it can display deep blacks in one portion of the screen and bright whites in another, producing images with enhanced depth, three-dimensionality and exceptionally accurate shadow detail.
Further, unlike conventional full-screen luminance control, the BRAVIA suppresses unneeded backlighting and, therefore, consumes less power than the conventional LED-backlit models. And, because it uses LEDs rather than the fluorescent tubes found in many HDTVs, Dynamic LED backlighting also promises exceptionally long life.
What kind of HDTV is better: Plasma, LCD , LED, etc.?
Q. I want to buy an 40" - 46" HDTV (1080p) for my home to replace my 10 year old 40 " CRT TV. I've seen different types out there: Plasma, LED. LCD. What's the difference and which is considered best (quality-wise). Any references to links that explain the different types of TVs on the market now. I'm just now able to afford getting into 21st century technology and would like some help.
A. Confused about what type of TV to buy? LED LCD Plasma.. How to choose?
After all, there are so many acronyms and buzzwords to wrap your head around, such as 1080p, 120/240Hz, 24p, HDMI and LED backlighting. Huh?
Along with deciding how big a screen you want (which is usually tied to the size of your budget and the dimensions of your room), the next choice should be between LCD.LCD (LED Backlit) or Plasma � and all have their merits. Here, we'll describe each of these formats, and also point out their shortcomings.
LCD
What is it?
lcd tv 120mhzSimilar to your laptop computer's monitor, flat-panel LCD televisions use a liquid crystal display to produce a sharp and bright picture; these crystals are sandwiched between two panes of polarized glass, which are stimulated by an electric current and illuminated by fluorescent tubes housed behind the glass. Some newer LCD TVs, however, use LED-backlighting instead. LEDs, or light-emitting diodes, translate to a better-looking picture (see photo).
Pros
There are a number of advantages to buying a LCD televisions. For one, with more than three-quarters of all televisions embracing this technology, there is a lot of choice when it comes to manufacturers, models and sizes (13- to 103-inches, in fact). Competition, of course, breeds more aggressive pricing, too, which is good news for the consumer.
Flat-panel LCD televisions are also very thin, light and energy efficient, and are ideal for rooms with plenty of ambient light, which, for example, comes through large windows as they tend to absorb rather than reflect light (reflected light can obscure your view of the screen).
Cons
Until recently, LCD TVs didn't handle fast motion images as well as plasma TVs, resulting in a somewhat blurred image. Newer LCD TVs, though, have added technologies such as 120Hz frame doubling (or 240Hz frame quadrupling) to smooth out motion. It's still not as good as plasma, but much better than before. Also, LCD TVs used to have problems showing dark blacks (because a light was still on behind the pixel showing black, resulting in a more greyish hue). Many LCD televisions today use local-dimming with LED-backlighting (see next section) for improved contrast ratios (whiter whites and blacker blacks) - but, keep in mind, this is not an issue associated with plasma TVs.
http://www.price-rank.com/search/lcd%20tv
LCD (LED Backlit)
What is it? Not a Different Type of TV
led lcd tv backlighting backlitIt�s tempting to think LEDs belong in a completely separate category beside LCD and plasma TVs, but in reality, an LED television is just a type of LCD TV. The proper term would really be "LED-backlit LCD TV," but that always seems to get truncated to "LED TV" in everyday conversation, perpetuating the confusion.
To understand how LEDs function in an LCD TV, think of an actual liquid-crystal panel as the plastic pegs in a Lite Brite. They hold a translucent image, but without a powerful backlight to punch through and light it up like a signboard, you�re not going to see much. On your old Lite Bright, an inefficient incandescent light did the job, but pretty unevenly. On a typical LCD TV, fluorescent lights provide the backlighting through a special plastic sheet called a light guide that distributes light from a fluorescent tube evenly over the surface of the TV. On an LED-backlit TV, fluorescent tubes are replaced with light-emitting diodes � LEDs � the same technology that probably lights up your digital watch, the buttons on your monitor, and the indicators on your stereo. They can be either situated along the edges of the TV like a fluorescent tube, or arranged directly behind the screen in a grid. But what difference does it make, and why would anyone spend so much money on it?
The Benefit of LEDs
The most obvious reason LEDs have fallen into favor in LCD TVs: they�re simply more efficient. Although fluorescent lights do a decent job converting electricity to light in the big scale of things, LEDs perform even better. Typically, manufacturers claim an efficiency improvement of up to 30 percent over fluorescent-based sets, which can add up significantly over the lifetime of a TV, especially on larger screens that use more juice to begin with.
LEDs are also much smaller than tubes, even after accounting for the number of them needed to light an entire TV. That means LED-backlit televisions can be manufactured significantly thinner than their tube cousins. For instance, most of the ultra-thin televisions that measured under an inch thick at CES used LED backlights, because they add very little depth to the profile. Though commercial variants aren�t quite as dramatically thin as these prototypes, they�re significantly skinnier than their fluorescent-backlit counterparts, making them some of the most chic and living-room-friendly HDTVs out there.
For home theater enthusiasts, LEDs only matter for one reason: image quality. Because fluorescent tubes mu
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