Domestic LED street lights are in full swing, and indoor lighting has become the focus of attention in the industry. Although the heat is not as good as LED street lights, the development prospects are optimistic for the industry. Xu Liancheng believes that indoor lighting involves thousands of households. After the true popularity of LED lighting, the market for indoor lighting is bigger than the market for outdoor lighting. LEDs are used in indoor lighting, especially in the rendering of atmosphere, and have any other light source that is unmatched in the past. Advantages, but in terms of the current domestic market, the price is still too high, and most people still can't afford it. The cost of LED lighting is mainly in LED chips. Xu Liancheng pointed out that as long as the price of the chip drops, the lumen price of LED can be reduced to the equivalent of the current energy-saving lamps, and indoor lighting will naturally bloom everywhere. LED chips also have a lot of room for price reduction, of which there are at least three ways: 1. Continue to improve light efficiency. In February of this year, Cree has announced that its laboratory LED light efficiency has reached 208 lm / W, I believe this is not a limitation, there will be room for improvement. 2. Towards the development of large currents in large chips. The current chip is generally between 0.5mm and 1.5mm, and the larger the chip is, the lower the light efficiency is. The chip does not have a large current and certainly cannot be increased. This is an obstacle to the development of LED to a single high power. The development of large currents in the direction of large chips means that the chips should be made larger without reducing the light efficiency, so that the power of the single LED can be greatly increased (relative to the current 1W), so that the LEDs used in the lamps The number of light sources will be significantly reduced, helping to reduce the cost of the lamps. 3. Development of new substrate materials. Today's high-power LED chip substrate materials are generally sapphire or SiC, both of which are very expensive, and are monopolized by large foreign companies, resulting in high chip prices. In order to break through international patent barriers, domestic research on Si substrate materials has been initiated and some progress has been made. The price of substrate materials using Si is much lower, not only because the price of the Si substrate itself is much cheaper than that of sapphire and SiC substrates, but also the fabrication of substrates larger than those of sapphire and SiC substrates to improve MOCVD. Utilization, thereby increasing die yield. Moreover, the Si substrate is also a conductive substrate, and the electrodes can be drawn from both sides of the die without having to be taken out from one side like the non-conductive sapphire, which can not only reduce the die area but also eliminate the GaN epitaxial layer. Dry etching step. At the same time, since silicon has a lower hardness than sapphire and SiC, it can also save some costs in processing. According to estimates by a well-known foreign company, the manufacturing cost of fabricating blue GaN LEDs using silicon substrates is 90% lower than that of sapphire substrates and SiC substrates. Xu Liancheng said that with the rapid decline in chip prices, I believe that it will be able to reach the level accepted by the people in the near future, so now it is time for enterprises to do technical reserve construction, and the basic work will be ready to occupy the market one step ahead. "The maturity of LED indoor lighting products and the bottleneck of price constraints have constrained the market. The real market is overseas markets. First, foreign electricity bills are high, and energy-saving requirements for indoor lighting products are large. Second, relevant energy-saving legislation and government support. In terms of the next three to five years, with the development of upstream chips, indoor lighting products account for 40% of semiconductor lighting applications, which is very optimistic," Xu Liancheng said. iPhone screen protector,Samsung screen protector,curved screen protector,hot bending film Guangdong Magic Electronic Limited , https://www.magicmax.cc