After more than ten years of development, China's LED lighting industry has made great progress. However, we should also note that many companies are now caught in the misunderstanding of the pursuit of light effects. It is true that improving the light efficiency makes the brightness higher, but we must know that it is not enough to rely on a light efficiency indicator for lighting products. Only when it fully meets the requirements of light, color, electricity, energy efficiency and safety is the true efficiency. Lighting, so we should put more emphasis on the overall quality of LED lighting products.
At present, it seems that due to the sharp reduction in the price of the chip, the cost of the light source that originally occupied the cost of the lamp is only 10 to 30 of the total cost, while the other parts such as the power supply and the heat dissipation account for 35 to 45. As a lighting product, the light source occupies such a low cost structure is clearly worthy of our vigilance.
The fundamental reason is that because the price of the chip is too high, the high-power chip is as high as a few dollars. In order to save costs, the enterprise uses the chip as little as possible, and increases the current by means of increasing the current, thereby improving the light efficiency. However, the data shows that at high current density, the lamp has low power supply voltage, large current, high power cost, low AC/DC conversion efficiency, high chip operating voltage, high temperature, low efficiency, and reliability. Deterioration, the phosphor light conversion efficiency becomes low. Therefore, the LED lamp is manufactured by such a scheme, the power cost is high, and the cost of the heat radiating member is also high. At the same time, this is also the reason why LED lighting products are often too light 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. The company has no need to follow the old road before. If working at a lower current density, the lamp can use a low-voltage power supply with high voltage and low current. The AC/DC conversion efficiency is high, and the chip luminous efficiency is also high. At the same time, the working voltage of the chip becomes smaller, the temperature becomes lower, and the efficiency becomes higher. The reliability is improved, and the luminous efficiency of the phosphor is high. Therefore, with such a scheme for manufacturing an LED lamp, the power supply cost becomes low, and the cost of the heat radiating member also becomes low.
Of course, the current density becomes lower, and to achieve the same light effect, it is necessary to use a chip. However, as the operating current density decreases, the number of quantum wells in the chip light-emitting layer is also reduced, and the manufacturing cost of the chip is also reduced, which is also a benign cycle. Therefore, this requires the coordinated development of all links in the entire LED lighting industry chain. More efforts are needed around the technical path of smaller current density, and appropriate use of chips to reduce the stringent requirements of the lamps for power supply and heat dissipation. In this way, the luminous efficiency and reliability of the LED luminaire will be further improved while keeping the total manufacturing cost of the luminaire little changed.
With the launch of Samsung's new series of 9 LED TVs in the 6000/7000/8000 series, Sharp also listed three products of the LE700A, which are mainly LEDs. The Sony ZX1 series is smashed with its 9.9mm ultra-thin. people's attention. A time of the LED TV has become a topic of recent industry in addition to black LCD panel prices the most talked about, like every new product secular, these LED TVs are valuable.
More expensive than ordinary LCD TVs, double the price of expensive LEDs
The most attractive thing about LED is its ultra-thin body. In addition to the Sony ZX1 less than 1 cm, Samsung's newly launched 6000/7000/8000 series has the ultimate ultra-thin body, the thinnest is only 2.99 cm. Compared to normal LCD TV of about 7,8 cm tall worthy eye-catching, however, these LED TVs in addition to Hisense TLM42T08GP, other quotes were about 10,003 yuan, even the 40-inch Samsung UA40B7000WF are 10006 About a thousand dollars.
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