LED energy-saving lamps and their market prospects

LED energy-saving lamps

The first category: LED energy-saving lamps made of straw-hat type low-power leds, and the power supply uses a resistance-capacitance step-down circuit. Straw hat type LED extended LED indicator package, epoxy encapsulation, making the LED chip can not emit heat, light degradation, many white LED, after a period of use, the color temperature becomes higher, gradually turning blue, Become dim. There are also manufacturers who are committed to the development of low-light-slung straw-type LEDs, but due to the fact that there has been no change in the package format, there is still no significant improvement in light failure. This type of LED energy-saving lamp products are transitional products with low prices and poor quality.

The second type (5050 patch): LED energy-saving lamps made of 3528 or 5050 power LED in the patch, the power supply also commonly used resistance-capacity step-down circuit, and some manufacturers use constant current circuit, compared to straw-type LED, posted The LED heat sink is slightly better, with a heat-conducting substrate, and it is able to extract a part of the heat when the aluminum substrate is used. However, due to the neglect of the LED heat, many of the power LED energy-saving lamps, no heat sink, still use plastic shell, light failure is still serious. The use of resistance-capacity buck low-end power supply, due to instability in the power grid voltage, current fluctuations, brightness also fluctuates, the price is moderate.

The third category: LED energy-saving lamps made of high-power SMD LED, the power supply commonly used constant current isolation circuit, that there is a constant current, such as 5W LED, usually using 5 1 watt LED chips, in series, using Constant current 300mA current source power supply, wide voltage power supply, so that when the power grid fluctuates, the current does not change, the luminous flux that the brightness is maintained constant, 5 SMD LED soldered on the aluminum substrate, aluminum substrate and then combined with the heat sink, the use of heat Disperses quickly and quickly to ensure that the LED chip temperature is lower than the allowable junction temperature of the LED, so as to ensure the real effective life of the LED energy-saving lamp. This type of LED lamp is of high price and good quality, and it is also the development direction of LED energy-saving lamps.

LED energy-saving lamps have the advantages of small size, high luminous efficiency, long life, low power consumption, and easy use, and have been favored by consumers. So far, LED energy-saving lamps have entered millions of households, but the LED lighting market is not very mature at this stage, various manufacturers of different standards, the national standard of LED lighting has not yet introduced, which also restricts the LED lighting market Healthy development.

Market analysis

At present, the semiconductor lighting industry has formed a tripartite industry distribution and competition pattern dominated by the United States, Asia, and Europe. Cree, Lumileds, Nichia, Toyoda Gosei, Osram, etc. Market.

The five major companies have their own characteristics in terms of products and markets. Nichia Chemicals and Toyota Synthetics have played an important role in the development of LED and formed a complete LED industry chain. Nichia Chemical produced the first blue chips in 1994, and The patented technology has monopolistic advantages; Cree, GelCore, and others have their own mature technology systems, but they focus on the epitaxial and chip preparation only in the industrial chain; Lumileds focuses on the research and development of high-power LEDs, and has the strength in the field of white light lighting. Strong.

Newly-entry industry's production capabilities, technical capabilities and LED veterans will be on a par with each other. Just as Taiwan is already Japan, the United States and Europe, the main source of white LEDs is an important source of blue LED chips. For example, some Taiwanese companies have developed 1700mcd of high-brightness blue LED chips, and the 1400mcd has also reached the shipping stage. Therefore, in terms of product output capacity and quality technology, it is no less inferior to traditional LED manufacturers.