After entering 2009, especially on the eve of National Day, LCD TVs using LED backlights have increased, and domestic manufacturers have almost released new LED LCD products.
Currently, flat-panel TVs on the market are mainly divided into two categories: plasma and liquid crystal. Under the strong promotion of manufacturers such as Changhong and Panasonic, the development and mass production of upstream plasma panels have made breakthrough achievements. In the future, plasma TVs and LCD TVs will coexist for a long time. LED LCD TVs are superior to LCDs and PDPs in terms of color performance, design and energy saving. They are the future development trend, while LCD TVs are divided into LCD LCD TVs with CCFL backlights and LED LCD TVs with LED backlights. The main difference between the two is that the backlight used in traditional LCD TVs, CCLF cold cathode fluorescent lamps, contains mercury harmful to the human body. Although manufacturers are trying to reduce the amount of mercury in the fluorescent tubes, the completely mercury-free fluorescent tubes will bring some new technical problems, and the LED backlights are absolutely free of mercury and are also very energy-saving.
However, the shortage of LED LCD TVs is also very prominent. As the LED industry is still not perfect, the main disadvantage of LED LCD TVs at this stage is that they are expensive, usually 2 to 5 times that of ordinary LCD TVs. At the same time, LED LCD TVs still have serious heat problems. The LED backlight has a large heat dissipation, and the working time is too long and the brightness and color are easily drifted under high temperature. Therefore, large-size LED LCD TVs usually require a heat-dissipating substrate, but these problems will be improved as the LED technology is improved and industrialized.
At present, the domestic LED backlight industry has already reached a certain scale, laying a foundation for the further development of domestic LED TV. In Shenzhen and the Pearl River Delta region, more than 700 LED companies have gathered, forming a relatively complete industrial chain, accounting for the national LED. 44% of the industry. In the color TV brand, Sharp, Toshiba, Samsung, LG and Panasonic master the core technology of LED backlight. At the same time, Hisense and Tsinghua Tongfang also have the independent technology and manufacturing capability of LED backlight. In general, the development of China's LED TV industry has been very good. The technical foundation.
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