Types of LED energy saving lamps
The first category: LED energy saving lamps, made by the straw hat, low-power led power RC step-down circuit. Straw hat LED continue to use the indicator LED package epoxy encapsulated, making the LED chip unable to shed heat, the light fades serious, a lot of white LED in use for some time, the color temperature becomes higher, and gradually into a bluish is getting dark. Manufacturers have committed to developing low-light decay straw hat LED, but did not change the package still did not change much, the light fades. These LED energy saving lighting products, is a transitional product, low prices and poor quality.
The second category (5050): made by 3528 or 5050 power LED LED energy-saving lamps, the power supply is also commonly used resistive and capacitive step-down circuit, there are some manufacturers using the constant current circuit, compared to the straw hat LED Post piece LED heat slightly better thermal conductivity of the substrate, with the aluminum plate can be part of the heat export. However, due to the heat of the LED or ignored, in power SMD LED energy-saving lamps, no radiator, and still use the plastic shell, the light fades is still serious. RC Buck low-end power, due to the instability of the grid voltage, current fluctuations, the brightness fluctuations, the prices moderate.
The third category: made by high-power SMD LED, LED energy-saving lamps, power supplies commonly used by the constant-current isolation circuit, ie, a constant current, usually 5 watt LED chips such as 5W LED in series, using constant current 300mA current source power supply, wide voltage power grid fluctuations, the current does not change, the luminous flux that is, to maintain a constant brightness, 5 SMD LED welding above the aluminum plate, aluminum plate and then combined with the heat sink, the use of The heat can be quickly dispersed to ensure that the LED chip temperature is lower than the LED junction temperature allowed in order to ensure the true useful life of the LED energy-saving lamps. Such high price of LED lights, good quality and direction of development of the LED energy-saving lamps.
LED energy saving lamps have a small size, high luminous efficiency, long life, low power consumption, easy to use, by the majority of consumers. So far, LED energy-saving lamps into the millions of households, but the LED lighting market is not very mature at this stage, standards vary for the various manufacturers, the LED lighting standard has not been introduced, which also restricts the LED lighting market healthy development.
Market analysis
At present, semiconductor lighting industry, the formation of the three pillars of the United States, Asia, Europe, three regions led the distribution of industries and competitive landscape, the United States Cree, Lumileds, Nichia, Japan (Nichia), Toyoda Gosei (Toyoda Gosei), Germany Osram monopoly high The end product market.
Five companies in product and market characteristics, and Nichia and Toyoda Gosei plays an important role in the development of LED, LED complete industrial chain, Nichia in 1994 to produce the blue chips, and patented technology has a monopoly advantage; such as Cree, GelCore, has its own mature technology system, but focus only on the industrial chain extension and microarray; Lumileds\\ focuses on the R & D of high power LED lighting field strength in the white strong.
New entrants to the industry\\ s production capacity, technical capability and LED veteran is about to go hand in hand. Like Taiwan is already a major producer of white LED outside the United States and Europe, more important amount of origin of the blue LED chip. For example, some of the industry has developed high-brightness blue LED chip 1700mcd 1400mcd also reached the shipping stage. So far as product output and quality, not inferior to the traditional LED manufacturers.
没有评论:
发表评论