The discussion of LED prospects is a commonplace. Due to its long life, low energy consumption, small size, fast response, anti-seismic resistance to low temperature, and low pollution, its application fields are extremely broad. According to preliminary calculations, the annual energy saved by LED lighting in China is equivalent to the annual power generation of the Three Gorges Power Station. At the same time, it can reduce the emissions of 80 million tons of CO2, 650,000 tons of SO2 and 320,000 tons of NO2, which is called "the history of human lighting." The revolution is not an exaggeration.
The development of semiconductor lighting is very rapid. Statistics show that since the birth of the 1960s, every ten years, LED costs have dropped tenfold and luminous efficiency has increased tenfold. And technical progress has always exceeded market expectations. Especially in 2008, the Beijing Olympic Games gave LED another shot of stimulant. The “Dream Long Roll†on the opening ceremony was displayed on more than 4,500 square meters, which is the largest single-color LED display on the world. When the "Fantasy Five Rings" made up of 45,000 LEDs were launched, the enthusiasm of the Chinese people for LED reached a new high.
In recent years, LEDs have been gradually expanding in the market areas such as traffic signs, automobiles, outdoor billboards, lighting and LCD backlights due to the rapid improvement of luminous efficiency and low power consumption and environmental protection. With the promotion of the Chinese government, semiconductor lighting will soon become a bright industry in China. According to statistics from relevant agencies, by 2010, the global LED application market will be 50 billion US dollars; China's LED application market will be 60 billion yuan.
LED backlights are most attractive for high-efficiency side-emitting backlights. LEDs, as LCD backlight applications, have long life, high luminous efficiency, no interference, and high cost performance. They have been widely used in electronic watches, mobile phones, BP machines, and electronics. On the calculator and credit card machine, with the increasing miniaturization of portable electronic products, LED backlights have advantages, so backlight production technology will develop toward thinner, lower power consumption and uniformity. LED is a key component of mobile phones. A regular mobile phone or PHS requires about 10 LED devices, while a color screen and a camera-equipped mobile phone require about 20 LED devices. At this stage, the amount of backlight used in mobile phones is very large, and 3.5 billion LED chips are used every year. At present, China's mobile phone production is very large, and most of the LED backlights are still imported. For domestic LED products, this is an excellent market opportunity.
From the perspective of IT, LED backlight is an important year for development in 2010. LED backlights are based on mercury-free green environmental protection, regional dynamic control backlight, low carbon energy saving, ultra-thin streamline appearance, and high color reproduction. The advantages of display and so on have greatly promoted the pace of LED replacement for CCFL. Each backlight manufacturer and LED manufacturers reached a cooperation relationship, and jointly proposed a solution to combine with the latest technology of large-size light guide plates. Ultra-thin, energy-saving, environmentally-friendly, high-quality LED backlights will surely become the next strong trend in backlight development.
However, LED backlight modules are not without drawbacks. The problem of power consumption is still an important issue that LED backlight modules must overcome. Due to the use of more LEDs, in addition to increasing power consumption, it also causes temperature rise. Therefore, it is necessary to increase the cooling system and the sensor to solve this problem, so it is thicker than the product using CCFL backlight. .
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