Detailed explanation of the classification and characteristics of LED driver power supplies

1. What is LED?

LED (Light Emitting Diode), also known as light-emitting diode, uses solid semiconductor chips as light-emitting materials. When a forward voltage is applied to both ends, the carriers in the semiconductor recombine, releasing excess energy and causing photon emission to produce visible light.

2. What are the advantages of LED?

★ High efficiency and energy saving, only a few kWh of electricity is consumed in one thousand hours (ordinary 60W incandescent lamp consumes 1 kWh of electricity in seventeen hours, ordinary 10W energy-saving lamp consumes 1 kWh of electricity in one hundred hours)

★ Ultra-long life semiconductor chip emits light, no filament, no glass bulb, not afraid of vibration, not easy to break, the service life can reach 50,000 hours (the service life of ordinary incandescent lamps is only 1,000 hours, and the service life of ordinary energy-saving lamps is only 8,000 hours)

★ Healthy light does not contain ultraviolet and infrared rays, and does not produce radiation (ordinary light contains ultraviolet and infrared rays)

★ Green and environmentally friendly, does not contain harmful elements such as mercury and xenon, is conducive to recycling and utilization, and does not generate electromagnetic interference (ordinary lamps contain elements such as mercury and lead, and the electronic ballast in energy-saving lamps will generate electromagnetic interference)

★ Protect eyesight with DC drive, no flicker (ordinary lights are AC driven, which will inevitably produce flicker)

★ High light efficiency, low heat generation: 90% of the electrical energy is converted into visible light (for ordinary incandescent lamps, 80% of the electrical energy is converted into heat energy, and only 20% of the electrical energy is converted into light energy)

★ High safety factor, small voltage and current required, low heat generation, no potential safety hazard, can be used in dangerous places such as mines

★ Large market potential Low voltage, DC power supply, battery, solar power supply is enough, can be used in remote mountainous areas and outdoor lighting and other places where there is a shortage of electricity or little electricity.

1. What is LED?

LED (Light Emitting Diode), also known as light-emitting diode, uses solid semiconductor chips as light-emitting materials. When a forward voltage is applied to both ends, the carriers in the semiconductor recombine, releasing excess energy and causing photon emission to produce visible light.

2. What are the advantages of LED?

★ High efficiency and energy saving, only a few kWh of electricity is consumed in one thousand hours (ordinary 60W incandescent lamp consumes 1 kWh of electricity in seventeen hours, ordinary 10W energy-saving lamp consumes 1 kWh of electricity in one hundred hours)

★ Ultra-long life semiconductor chip emits light, no filament, no glass bulb, not afraid of vibration, not easy to break, the service life can reach 50,000 hours (the service life of ordinary incandescent lamps is only 1,000 hours, and the service life of ordinary energy-saving lamps is only 8,000 hours)

★ Healthy light does not contain ultraviolet and infrared rays, and does not produce radiation (ordinary light contains ultraviolet and infrared rays)

★ Green and environmentally friendly, does not contain harmful elements such as mercury and xenon, is conducive to recycling and utilization, and does not generate electromagnetic interference (ordinary lamps contain elements such as mercury and lead, and the electronic ballast in energy-saving lamps will generate electromagnetic interference)

★ Protect eyesight with DC drive, no flicker (ordinary lights are AC driven, which will inevitably produce flicker)

★ High light efficiency, low heat generation: 90% of the electrical energy is converted into visible light (for ordinary incandescent lamps, 80% of the electrical energy is converted into heat energy, and only 20% of the electrical energy is converted into light energy)

★ High safety factor, small voltage and current required, low heat generation, no potential safety hazard, can be used in dangerous places such as mines

★ Large market potential Low voltage, DC power supply, battery, solar power supply is enough, can be used in remote mountainous areas and outdoor lighting and other places where there is a shortage of electricity or little electricity.

3. Authoritative prediction

Semiconductor lighting will replace existing traditional light sources in the next 5-10 years.

"White light LEDs will be cheaper in the future, and the overall market capacity will grow rapidly." Xu Zhipeng optimistically pointed out that according to the US Department of Energy's forecast, around 2010, 55% of incandescent and fluorescent lamps in the United States will be replaced by LEDs, which may form a $50 billion industry. Japan has proposed that LEDs will replace traditional incandescent lamps on a large scale this year. Japan, the United States, Europe, South Korea and other countries have officially launched LED lighting strategic plans.

The U.S. Department of Energy predicts that by around 2010, 55% of incandescent and fluorescent lamps in the United States will be replaced by semiconductor lamps, which are luminous bodies embedded in chips. Japan plans to replace 50% of traditional lighting fixtures with such semiconductor lamps by 2008. Scientists have found that at the same brightness, the power consumption of LEDs is only 1/10 of that of incandescent lamps, and the life span is 100 times that of incandescent lamps. Due to the advantages of LEDs such as energy saving, environmental protection, long life and small size, experts call it another leap in the history of human lighting after incandescent and fluorescent lamps. According to the U.S. Department of Energy (DOE), the complete replacement of traditional lighting devices will start in 2010, but many LED suppliers hope to bring this start time forward by one to two years.

4. Following Australia, the EU wants to ban incandescent bulbs within two years

On March 9, 2007, strings of colorful lights flickered on the streets of London, England. The EU summit that just ended passed a series of measures aimed at improving energy efficiency. The EU spring summit that ended on the 9th has reached an agreement that within two years, European countries will gradually replace old-fashioned incandescent bulbs with energy-saving fluorescent lamps to reduce greenhouse gas emissions. Prior to this, Australia had taken the lead in passing a law to stop using incandescent bulbs.

5. LED lighting output value will exceed 100 billion US dollars, Tongfangzheng is making efforts

Sun Min, vice president and secretary of Tongfang Co., Ltd., recently revealed to reporters that the company's high-brightness LED lighting project has basically achieved industrialization. Currently, 20 production lines have been put into production. Its industrialization technology has reached the world's advanced level. It is planned that by the end of 2008, the number of production lines will reach 50, forming a scale effect of green lighting. It is estimated that the scale of my country's application market will reach 54 billion yuan in 2008. By 2010, the output value of China's semiconductor lighting and related industries will exceed 100 billion US dollars, of which the domestic growth rate of high-brightness chips will be as high as 100%.

6. Seoul Semiconductor hopes to gain a $100 billion share of the global lighting market.

Seoul Semiconductor of South Korea is now planning to replace traditional lighting with LEDs. The brightness of the current Acriche 60 lumens/watt will be increased by 50% to 80 lumens/watt in the fourth quarter of 2007, with each module having 250 lumens; and will reach 120 lumens/watt in the fourth quarter of 2008, with each module having 400 lumens. It hopes to gain a share of the $100 billion global lighting market.

7. Australia and New Zealand will be the first to stop using incandescent light bulbs

The Australian government recently announced that in order to reduce greenhouse gas emissions, Australia will ban the use of incandescent lamps except for medical purposes. By 2012, Australia will reduce greenhouse gas emissions by 4 million tons.

According to a report in The Dominion Post on February 21, 2007, New Zealand Energy Minister David Parker suggested that New Zealand should also follow Australia's practice and ban the use of ordinary incandescent light bulbs in the next two to three years and replace them with energy-saving and environmentally friendly fluorescent bulbs (Florescent Eco Bulb). Australian Environment Minister Malcolm Turnbull said that Australia will implement new civil lighting standards in 2010, and through the implementation of the new standards, greenhouse gas emissions can be reduced by 4 million tons in 2012.

It is reported that this new fluorescent bulb is mainly imported from China.

8. Why LED is the first choice for corridor lights

1. At present, the price of LED is still relatively high. Corridor lights are shared facilities, so everyone can accept it if they share the cost.

2. Incandescent lamps are now commonly used in corridor lamps. If they are replaced with LED lamps, the energy saving effect will be particularly obvious.

3. The corridor lights are off during the day. At night, they are frequently turned on or off. Not to mention energy-saving lamps, even incandescent lamps will soon run out of power. But LED lamps are not afraid, because their light-emitting mechanism is different from that of incandescent lamps and energy-saving lamps. They are very suitable for high-speed switching working conditions and will never be damaged for this reason.

4. The life of LED lamps is very long, which eliminates the embarrassing situation that corridor lights often need maintenance.