Domestic LED driver performance is close to international brands
The drive circuit is an important part of LED application products, and its technology maturity is gradually increasing with the expansion of the LED market. Whether in lighting, backlight or display panels, a number of mature products have emerged. However, with the further development of LED applications, the industry has put forward higher requirements for drive solutions, and also brings huge opportunities and challenges to the LED drive industry. How do we view the technology trends of LED drivers? How to interpret the current difficulties and hot spots? Where is the market direction? Faced with various questions, Optoelectronics News produced the "LED driver IC driving LED to popularization" news topic, comprehensive analysis of existing technical solutions, interviewing well-known experts in the industry, exploring the development trend of the industry, and striving for the LED industry The status quo and future trends are reported in all directions. The following is the view of China Resources Weiwei Yanguangguang Manager.
Optoelectronic News Network: Please briefly introduce the layout of LED driver series of China Resources Converse. What are their advantages and characteristics?
Yan Chongguang: The layout of China Resources Converse LED driver series is mainly the backlight of mobile phone and MP3 LCD screen. In recent years, it has entered the LCD screen backlight of MP4, P-DVD and GPS. This year's new products will enter NB and The LCD screen of the netbook is backlit, and next year's new products will focus on the backlight of the LCDTV. In 2007, the company successfully developed the first generation of local LED lighting driver ICs of PT4105. Later, it launched PT4115 and PT4107LED driver ICs. It is widely welcomed by emerging LED lighting manufacturers because it provides DEMO solutions that can be directly used in LED lamp production. PT4115, Shipments of the PT4107 have soared. The LED large-screen driver IC has not been involved in the development due to the limited market for LED large screens.
Optoelectronic News Network: What are the current difficulties in LED driving? What is the gap between domestic and foreign manufacturers?
Yan Chongguang: The technical difficulties of LED driver ICs are high constant current accuracy, wide voltage range of Vin, high voltage process of wafer, and heat dissipation of MOS built into chip. With a large number of European and American famous integrated circuit companies with many years of design experience, returnees are returning to allegiance. The level of power chips designed by local integrated circuit companies is completely close to the foreign similar level, and has good cost performance and competitiveness. At present, LED drivers of foreign companies IC also has certain advantages in voltage withstand, and local ICs need to redouble their efforts.
Optoelectronic News Network: What is the current competitive landscape of LED drivers in China? What is the market position of China Resources Converse?
Yan Chongguang: At present, the competition of domestic LED driver ICs is a three-pronged pattern of foreign famous brand IC companies, Taiwan-funded IC companies and local IC companies. The IC itself has cost-effective and performance-optimized, low-cost system solutions that can be directly used in production. It will be the key to winning the competition. From June 2009, China Resources Converse has promoted the MR16, 220V/110V fluorescent lamp solutions that can be directly used for production, and provides the final manufacturer with DEMO, circuit diagrams and bill of materials (BOM) that can be directly loaded into the lamps to promote the products. The cycle has been shortened from a few months to a few weeks or even a few days in the IC marketing application practice, and the PT4115 and PT4107 are therefore hot. Recently, the application schemes of off-line LED spotlights E27, PAR30 and P38 based on PT4201 and PT4201, and DEMO which can be directly used for production have been introduced, providing LED lamp manufacturers with more direct product design and turnkey one-stop technical services.
Optoelectronics News Network: In terms of backlight, there are edge backlight, direct backlight, RGB backlight, which technology do you like? What are the advantages and disadvantages? What is the future direction of development?
Yan Chongguang: Phosphor white LEDs are obviously inferior to RGB in terms of sharpness and color purity. However, due to low application cost and relatively simple control technology, there are many applications at present; RGB LED backlights are difficult to be widely used due to high application cost. accept. In the current market, phosphor white LEDs are the main backlight LEDs.
(Edit: Sandwich)
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