LED lighting industry needs overall coordinated development1

After more than ten years of development, China's LED lighting industry has made great progress. However, we should also note that many companies have fallen into the misunderstanding of blindly pursuing light efficiency. It is true that improving the luminous efficiency can make the brightness higher, but we should know that it is far from enough for lighting products to rely solely on a luminous efficiency index. only when the requirements of light, color, electricity, energy efficiency and safety are fully met is the real efficient lighting, so we should place more emphasis on the overall quality of LED lighting products. At present, due to the sharp reduction in chip prices, the cost of light sources, which originally occupied the top of lamp costs, is only 10 ~ of the total cost. 30, while other parts such as power supply and heat dissipation account for 35 ~ 45. As a lighting product, the low cost structure of light source is obviously worthy of our vigilance. The fundamental reason is that the price of the chip was too high before, and the high-power chip was as high as a few yuan. In order to save costs, the enterprise uses as few chips as possible and adopts the method of increasing the current to increase the chip power. thereby improving the light effect. However, the data show that when working at high current density, the lamp power supply voltage is low, the current is large, the power supply cost is high, and its AC/DC conversion efficiency is low. At the same time, the chip working voltage becomes high, the temperature becomes high, and the efficiency becomes low. the reliability also deteriorates, and the light-to-light conversion efficiency of the phosphor becomes low. Therefore, using this scheme to manufacture LED lamps has high power supply cost and high heat dissipation component cost. At the same time, this is also the reason why LED lighting products often fade too fast in use. Now the price of high-power chips has dropped to a few cents, and the price of low-power chips is only a few cents. It is completely unnecessary for enterprises to follow the old road. If working at a lower current density, the lamp can adopt a low-cost power supply with high voltage and low current. The AC/DC conversion efficiency is high, and the luminous efficiency of the chip is also high. At the same time, the working voltage of the chip becomes smaller and the temperature becomes lower. the efficiency is high reliability better phosphor light conversion efficiency is high. Therefore, using this scheme to manufacture LED lamps will reduce the cost of power supply and the cost of heat dissipation components. Of course, the current density is low, and to achieve the same luminous efficiency, more chips are needed. However, as the working current density decreases, the requirement for the number of quantum wells in the light emitting layer of the chip also decreases, and the manufacturing cost of the chip will also decrease, which is also a virtuous cycle. Therefore, this requires the coordinated development of all links in the entire LED lighting industry chain, making more efforts around the technical route with lower current density, using more chips appropriately, and reducing the harsh requirements of lamps on power supply and heat dissipation. In this way, the luminous efficiency and reliability of LED lamps will be further improved while maintaining little change in the total manufacturing cost of lamps. With Samsung's launch of 9 new led TV products in the 6000/7000/8000 series, Sharp has also launched 3 LE700A products mainly based on LED, while Sony's Hyun thin ZX1 series is 9. The ultra-thin 9mm has grabbed people's attention. For a time, LED TVs have become a topic of concern in the black electricity industry except for the price increase of LCD panels. Like every new product, these LED TVs are worth a lot of money. Nearly twice as expensive as an ordinary LCD TV, the expensive LED is criticized. The LED is more attractive than its ultra-thin body, except that Sony ZX1 is less than 1 cm. samsung's newly launched 6000/7000/8000 series this year all have ultra-thin bodies, only 2. Thin. 99 cm. Compared with ordinary LCD TVs with a figure of about 8 cm to 10 thousand, these LED TVs are all priced at about yuan except Hisense TLM42T08GP. even the 40 inch Samsung UA40B7000WF is around 10 thousand yuan.