At present, the LED-driven technology development, will present the high-power, high reliability, efficiency and power optimization, with the trend of the cost advantage and comprehensive improvement in price performance and high integration and small size. LED Floodlight 80W main technical challenge is how to realize the long life of LEDs? How to improve power efficiency in the use of EMC immunity? And how to obtain high power and reliability?
(The EUTECH) Companies in China, TechFaith FAE Manager Lu Shiyong, said LED is low voltage, high current-driven device, the application will generate a lot of heat and its application environment is also diverse, therefore, faced with the following technical challenges: LED driver provide efficient and reliable power conversion solutions, such as TV, AC-DC power conversion and LED driver as a whole to consider providing a complete solution; in order to obtain a higher efficiency of the system and solve the heat problem, we must require low on-resistance, but LED 400W light bar requires a high voltage driver, a compromise between the high voltage, low on-resistance and cost is a technical subject.
The sun and the moon into the company's chairman and general manager Zhao the Yichen pointed out, based on the surface of the obvious advantages of the LED and market applications continue to expand the LED market will show a two-stage growth. The first stage of investment and commercial annual growth rate is maintained at 20 to 30 percent in the next three to five years; The second stage is a necessity after three years as a consumer, its annual growth rate will reach 50 to 80% of the LED 200W the popularity of the application market will be synchronized to drive steady and rapid growth of the LED driver.
He further said that the different power and application of LED professional corresponding LED driver technology. For example, LED screens and LED backlight, requires accurate current and time control technology to achieve the brightness and grayscale characteristics, efficient grayscale and color modulation techniques; LED lights focused on the rapid light, more stringent light fades control, high-power reliability and color temperature control technology, the use of the environment even worse.
Lu Shiyong, LED Blue 150W application market is the lighting and backlighting. With the commercialization of high brightness LED and the LED unit price continued to decline, LED lighting and backlighting on the application of universal acceleration, so the market is also growing demand for LED driver IC. From the shipping point of view of the global LCD TV / display market, the 2011 full-year shipments of 380 million units, LED backlight penetration rate of 44 percent, in 2012, this data will exceed 70%, a good prospect. The EUTECH focus on the LED strip lights backlight market (Figure 1) product line smartphones from 3.5 inches to 46-inch LCD TV within-size LCD panels, LED backlight driver program. LED driver with AC-DC power supply technology, to provide efficient, reliable overall solution, the LED driver technology trends.