You know with LED TV

With the constantly updated display technology , mainstream TV is constantly refurbished. Today, LCD TV into the appliance store counters , we often see the words "LED TV" . So, what exactly is LED TV ? What are the characteristics of LED TV ? What to buy time and need to pay attention ?
Most problems many consumers face is "What is LED TV " "LED TV and LCD TV What's the difference ," and so on. In fact , LED TV only our popular name for it, strictly speaking , LED -backlit LCD TV is a more apt title.

In other words, the so-called LED TVs on the market , not a mainstream technology branch of flat-panel TVs , but the traditional CCFL backlit LCD TVs sources used to replace the new LED light source , which is essentially an LCD TV.
Well , LED as a light source , what characteristic? First, we still want to talk briefly about the imaging principle LCD TVs.

And Plasma TVs from different light source, LCD TV is a passive luminescence imaging , ie, need to use the LCD TV backlight emits light through the polarizer , then through the liquid crystal molecule layer , followed by another piece of color filter and polarizer and imaging. Since the liquid crystal molecules in the voltage fluctuation will change the angle of the arrangement of the light transmittance is changed to form an image change.

Used in traditional LCD TVs are called cold cathode fluorescent lamp CCFL backlight, as well as because of its mercury and other harmful substances , not environmentally friendly.
And a light emitting diode LED is the material known by the voltage change using the semiconductor light emitting chip , which has excellent light emitting characteristics not only better color saturation , fast response time , less light leakage . By increasing the contrast , regional control and other means , the display performance is much better than the CCFL technology. And do not contain mercury and other harmful substances, more healthy environment.

In addition , the use of LED backlight TV is thinner and lighter body , and longer life , usually LED life can reach 100,000 hours , 10 hours a day by using , you can use 27 years , compared to traditional light sources 5-6 years many long life , so popular with consumers .
In the field of television uses LED technology , Graphic LCD Display mainly primary colors of white and two technical branches.

White LED can emit white light, after the liquid crystal layer, and then through the R / G / B color filter into a separate color. LCD TV color quality of light quality is mainly determined by the backlight . RGB backlight spectrum of light for each primary color the higher the purity , the more pure colors to restore the order in the final , only to restore the pure RGB primary colors , in order to deploy a pure and true color effects.

White LED TV is divided into two sides of the direct type and style . Using side -emitting structures can be made ​​into a TV slim, ultra-thin LED TVs currently on the market and more are adopting this technology. Direct type white LED brightness can be adjusted locally , thus higher overall picture quality of some .
Another branch of technology that can be issued issued LED backlight technology R, G, B primary colors of light. Since the backlight RGB primary colors can be independently controlled to achieve a more wide color gamut , better color performance . While also effectively enhance the contrast of the TV , to achieve more accurate color gradation and layering more pictures , but also has three primary levels of local backlight adjustment function. Currently mainly used for high-end LCD TV.

In addition ,OLED Module some companies have developed on the basis of a more sophisticated technology, such as Sharp's Western -primary color display technology is the basis of the added RGB Y, that is yellow , so richer color performance .