LED TV shopping points

After several years of rapid development, LCD LCD TV has gradually faded high and noble coat, ordinary people can afford to become a daily household appliances. At the same time, a new thing called LED TV also began to gradually enter the consumer's vision, and with excellent performance has become the new darling of many high-end users. In fact, the so-called "LED TV", is not the true sense of pure LED as light show all parts of TV, but will LED as LCD TV backlight, improved LCD TV to replace the traditional use of the cold cathode fluorescent lamp. LED TV is not a short time, as early as 2007, SONY and Samsung Corp have launched a formal commercial LED tv. It was only for a variety of reasons at that time only a 70 inch super size models. After a brief and calm in 2008, in 2009 there was a wide range of LED TV blowout situation, the increase in the number of products, but also to prepare a lot of consumers to buy LED TV with a new confusion. The opening ceremony of the Beijing Olympic Games is a real LED display device, and LED TV is still a kind of LCD tv. So now on the market of LED TV and what kind of LED TV, which need to pay attention to? Today we will make a simple discussion on these issues. , white or light color color based decided in front of LED TV once said that as early as 2007 had already appeared. After more than 2 years of development, the current market LED TV also appeared a lot of classification, not only between the different effects of different technical schools, the price will often be very different. RGB primary colors are the basis of all TV lighting LED itself is a very good light source, with the current technology has a lot of factories around the world have the ability to mass produce a variety of colors LED light source. Therefore, in the LCD TV LED backlight can be used in accordance with the luminous color, divided into RGB-LED and white LED two categories. It is often said the red green blue RGB-LED (red, green, blue) three LED. Because the human eye can see a variety of colors can be synthesized using R/G/B tricolor, so this type of LED TV will be directly back to the light source can emit red, green and blue three LED. Then through the precise control of the circuit part to achieve dimming, can be combined into any one color of the light source, in order to achieve a better color effect. White LED is not uncommon in real life, for example, a lot of LED bulbs is white LED and white LED is relatively simple, is a white light LED will be issued as a backlight. This and before the LCD TV commonly used CCFL light source is very similar. Therefore, the performance of white LED in color and not so good RGB-LED, its main advantage is not here. The RGB-LED backlight uses three color independent LED, so from the perspective of color effect is the best choice, such as SONY's X4500 using the RGB-LED backlight, the official value of the color gamut range that can reach close to 150%NTSC, even better than most plasma TV, many people enough to subvert the traditional concept the. If the color gamut range, white light LED is far more than rival RGB-LED white LED RGB-LED though not so wide color gamut, but because the luminous efficiency is better than that of itself the vast CCFL backlight LCD TV most, so most of the color gamut can reach about 90% NTSC level. In the ordinary LCD TV, this data is about 75%. Therefore, for the vast majority of consumers, according to their actual needs to consider the purchase of RGB-LED models, or the use of white LED models. In addition to the above two backlight colors, there are manufacturers introduced a hybrid backlight: both traditional CCFL cold cathode fluorescent tube, also joined the red LED light source, because red is a color CCFL is difficult to achieve perfect performance, through the combination of both cost and quality. But this technology has not yet become the mainstream, there is no cost on TV products. ELlSpacing=0 cellPadding=0 border=0>

, direct type or side arrangement also pay attention to before the LCD TV era, people paid more attention to the backlight is not high, but some manufacturers claim that their backlight has "bright color" features, a lot of people don't even know the backlight look, not to mention the backlight the arrangement of the source. But for flat-panel TVs, the arrangement of the backlight source has a certain impact on the quality of. Because now the TV screen area are relatively large, if the backlight arrangement is not reasonable, it is easy to cause uneven lighting or light leakage problems, resulting in a negative impact on the final quality. The same is true of several LED positions, LCD TV in the use of LED as a backlight, but also to face the same problem. Judging from the current situation, the layout of the LED can be divided into straight down and side by side two categories. The meaning of the formula is straight behind the LED backlight in LCD panel, light directly toward the LCD panel, and similar to the traditional CCFL method; and the side is LED positioned on the sides of the liquid crystal panel, the light guide plate through the special propagation direction can change toward the LCD panel. SONY's 40 inch LED TV thickness of 0.99 cm, using a side LED