LED life lighting drive design four challenges
China's real estate industry has overdrawn the future development potential. China's LED industry is also overdrafting future capacity and market. Some people began to describe the current Chinese LED industry. Undoubtedly, the development of China's LED industry in 2009 exceeded our expectations, and the scale LED industry project was blooming in the east, west, and north. Governments, venture capitalists and companies are gambling LEDs. However, many industry experts believe that the LED industry has already seen overheated investment. After the completion of a large number of LED projects, China's LED industry will not be concentrated, overcapacity, market disorder and lack of talent.
According to statistics, at present, there are 62 LED epitaxial and chip companies in China, more than 1,000 LED packaging companies, and nearly 2,000 LED application companies. However, China's LED companies generally have problems such as low technological content, low innovation capability and lack of core competitiveness. With the entry of international giants into the Chinese market, many domestic companies with certain core competitiveness will face the risk of being merged, and the uncompetitive enterprises will be directly eliminated. Mei Jian, an investment partner of Dongfang Haifu, once said bluntly: "I have seen many companies in the LED industry. Unfortunately, I have not completed an investment yet. I feel that there are many enterprises in the LED industry in China, but those with long-term development are not. More." Let's take a look at his "suggestions for LED companies", perhaps for our LED startup companies.
Drive design four challenges
Due to the difference in physical properties of LEDs in the original device, the concept of making a light source system is quite different from the traditional design, and more technical and professional assistance is needed.
1. Power conversion: If the original LED device is not specially made, it is generally a DC drive component, and the general living power source is AC AC power. The AC wall socket must be converted to DC for the application, or the AC LED is selected for the LED. The component effectively converts AC large power into a low-voltage DC power source required by the LED.
2. Drive and control circuit: LED driver needs electronic circuit assistance, which has achieved high efficiency. However, the dimming design of general incandescent lamp must be adjusted by DC power supply control if it is to be realized in LED emerging light source. Complexity is more complex than traditional light sources.
3. Heat treatment: The original LED device is a point light source, and the illumination temperature will be concentrated at a single point, and the components of the original device are designed for heat dissipation enhancement to achieve self-heat dissipation, but the heat source will still be excessively concentrated in the spot position of the lamp. The problem, this is to test the processing power of the junction temperature control, which must be combined with the active/passive heat dissipation design to achieve the purpose of extending the working life of the lamp.
4. Optical device: Since the LED light source is a compact and high-efficiency point light source, although it has a wide color output control effect and excellent energy efficiency performance, after all, the requirements of the living illumination source require a uniform and stable continuous light type. Illumination, the point source of excessive concentration of LEDs must produce optical performance similar to that of traditional lamps through optical devices or lenses and light guiding materials.
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