Linear regulator to convert the voltage will face power problem, switch-mode noise is a problem, LED driver to choose which conversion depends on what kind of application.
What kind of conversion
Through the linear regulator to convert the voltage will face power problems, this approach is more suitable for the need to avoid the noise (such as car audio) and therefore can not use switch mode converter circuits. The switch means is characterized by very high conversion efficiency, but it also has noise problems, so what choice of conversion depends on the application.
Typically, the charge pump drive the efficiency of the input voltage changes, the voltage range of applications, their efficiency is relatively low; while relatively small in the voltage range of applications, only when the input and output voltage multiple relationship between the whole, it can achieve maximum efficiency, but in the practical application of battery-powered difficult to achieve. The other hand, the conversion efficiency is not affected by inductive voltage interfere with, the application limit is less than the charge pump, so the inductor current mode converter to use more.
How to evaluate the performance
Objective that the performance evaluation hb led driver ic point of view according to different applications, can not be generalized. Applications such as decorative lighting rgb color change of control requires high performance to be the main target of this, and in monochrome applications do not require this. Another example is the application of a small space requirements of the heat dissipation capacity; automotive lighting applications require both replace the original circuit system with smooth combination of performance also requires high reliability; in nb like displays, led multi-string balanced brightness control requirements for each one on the road driving ic have precise control of current, such as the maxim of the product control precision can reach 3%; projector applications require high efficiency driver circuit, the ability to quickly adjust the brightness and thermal protection capacity; in alternative applications, the performance is more reflected in the program rather than a single drive ic on. In general, device integration, control the quantity, response speed, fault diagnosis, evaluation of heat are all properties of reference.
Typically, the high level of integration aimed at improving performance, but at high power, highly integrated high current will increase to meet the chip area, but also in increasing the cost of the problems facing the heat, so, how to balance between power and integration The relationship is driven issues facing ic design. Driver ic chip technology to meet the cost of the improvement at the same time, improved cooling package to solve the problem.
Tuesday, 30 November 2010
What criteria to select a reasonable LED drive
Linear regulator to convert the voltage will face power problem, switch-mode noise is a problem, LED driver to choose which conversion depends on what kind of application.
What kind of conversion
Through the linear regulator to convert the voltage will face power problems, this approach is more suitable for the need to avoid the noise (such as car audio) and therefore can not use switch mode converter circuits. The switch means is characterized by very high conversion efficiency, but it also has noise problems, so what choice of conversion depends on the application.
Typically, the charge pump drive the efficiency of the input voltage changes, the voltage range of applications, their efficiency is relatively low; while relatively small in the voltage range of applications, only when the input and output voltage multiple relationship between the whole, it can achieve maximum efficiency, but in the practical application of battery-powered difficult to achieve. The other hand, the conversion efficiency is not affected by inductive voltage interfere with, the application limit is less than the charge pump, so the inductor current mode converter to use more.
How to evaluate the performance
Objective that the performance evaluation hb led driver ic point of view according to different applications, can not be generalized. Applications such as decorative lighting rgb color change of control requires high performance to be the main target of this, and in monochrome applications do not require this. Another example is the application of a small space requirements of the heat dissipation capacity; automotive lighting applications require both replace the original circuit system with smooth combination of performance also requires high reliability; in nb like displays, led multi-string balanced brightness control requirements for each one on the road driving ic have precise control of current, such as the maxim of the product control precision can reach 3%; projector applications require high efficiency driver circuit, the ability to quickly adjust the brightness and thermal protection capacity; in alternative applications, the performance is more reflected in the program rather than a single drive ic on. In general, device integration, control the quantity, response speed, fault diagnosis, evaluation of heat are all properties of reference.
Typically, the high level of integration aimed at improving performance, but at high power, highly integrated high current will increase to meet the chip area, but also in increasing the cost of the problems facing the heat, so, how to balance between power and integration The relationship is driven issues facing ic design. Driver ic chip technology to meet the cost of the improvement at the same time, improved cooling package to solve the problem.
What kind of conversion
Through the linear regulator to convert the voltage will face power problems, this approach is more suitable for the need to avoid the noise (such as car audio) and therefore can not use switch mode converter circuits. The switch means is characterized by very high conversion efficiency, but it also has noise problems, so what choice of conversion depends on the application.
Typically, the charge pump drive the efficiency of the input voltage changes, the voltage range of applications, their efficiency is relatively low; while relatively small in the voltage range of applications, only when the input and output voltage multiple relationship between the whole, it can achieve maximum efficiency, but in the practical application of battery-powered difficult to achieve. The other hand, the conversion efficiency is not affected by inductive voltage interfere with, the application limit is less than the charge pump, so the inductor current mode converter to use more.
How to evaluate the performance
Objective that the performance evaluation hb led driver ic point of view according to different applications, can not be generalized. Applications such as decorative lighting rgb color change of control requires high performance to be the main target of this, and in monochrome applications do not require this. Another example is the application of a small space requirements of the heat dissipation capacity; automotive lighting applications require both replace the original circuit system with smooth combination of performance also requires high reliability; in nb like displays, led multi-string balanced brightness control requirements for each one on the road driving ic have precise control of current, such as the maxim of the product control precision can reach 3%; projector applications require high efficiency driver circuit, the ability to quickly adjust the brightness and thermal protection capacity; in alternative applications, the performance is more reflected in the program rather than a single drive ic on. In general, device integration, control the quantity, response speed, fault diagnosis, evaluation of heat are all properties of reference.
Typically, the high level of integration aimed at improving performance, but at high power, highly integrated high current will increase to meet the chip area, but also in increasing the cost of the problems facing the heat, so, how to balance between power and integration The relationship is driven issues facing ic design. Driver ic chip technology to meet the cost of the improvement at the same time, improved cooling package to solve the problem.
An often overlooked advantage of LED
We know that mercury is an extremely toxic substance, however, almost all high-power light sources currently used in all contain mercury, the mercury content of various power sources as follows:
The low boiling point of mercury, can be evaporated at room temperature. Waste disposal of a broken light immediately after the distribution of mercury vapor into the surrounding, and instantly make the mercury in ambient air concentration of 10-20 mg / cubic meter, exceeding the state's maximum allowable mercury concentration in air (0.01 mg / cubic m) of the 1000 to 2000 times. , According to Stanford University research on mercury that 1 mg of mercury pollution 5454.5 kg of drinking water is sufficient to make it reach the safety standards for drinking water. Mercury in air and water pollution caused by very serious consequences, are aquatic food will be generated after the CH3Hg, this is a highly toxic material, as long as half Ershao can cause human doom. Mercury itself will damage the central nervous system, reproductive defects caused by the effect it is very serious, mercury can damage the kidneys and liver, under conditions in sufficient doses can even lead to death.Mercury can be in different ways in the soil, water, and even the atmosphere, the food chain transfer. Therefore, persistence, and easy mobility and a high degree of bioaccumulation, making the mercury into the world one of the most interesting environmental pollutants. The worst in history to be mercury poisoning Minamata disease events in Japan, and it was not the Minamata Bay mercury pollution in water is many hundreds of people died. Now the Japanese government learned a lesson, requiring all of the waste fluorescent lamps treatment of toxic substances must be carried out, requiring people to buy ordinary fluorescent required to pay twice as much advance the toxic substance handling charges.
Recently, the Chinese government issued 100 million free energy-saving lamps, although recent foreign special energy-saving lamps, low mercury content of mercury can be reduced to 5mg or less (do not know the Chinese government is not the case issued energy-saving lamps, low mercury), but no did not reduce its hazardous nature, such as an energy-saving lamps, low mercury content of mercury is enough to 27.27 tons of drinking water pollution. The 100 million energy-saving lamps sufficient to 2.7 billion tons of polluted water, equivalent to the National People's amount of drinking water for years。
| 26mm fluorescent lamp | Metal halide | HPS | Energy saving lamp | All led |
| 25-45mg | 20-25mg | 12-14mg | 10-15mg | 0 |
The low boiling point of mercury, can be evaporated at room temperature. Waste disposal of a broken light immediately after the distribution of mercury vapor into the surrounding, and instantly make the mercury in ambient air concentration of 10-20 mg / cubic meter, exceeding the state's maximum allowable mercury concentration in air (0.01 mg / cubic m) of the 1000 to 2000 times. , According to Stanford University research on mercury that 1 mg of mercury pollution 5454.5 kg of drinking water is sufficient to make it reach the safety standards for drinking water. Mercury in air and water pollution caused by very serious consequences, are aquatic food will be generated after the CH3Hg, this is a highly toxic material, as long as half Ershao can cause human doom. Mercury itself will damage the central nervous system, reproductive defects caused by the effect it is very serious, mercury can damage the kidneys and liver, under conditions in sufficient doses can even lead to death.Mercury can be in different ways in the soil, water, and even the atmosphere, the food chain transfer. Therefore, persistence, and easy mobility and a high degree of bioaccumulation, making the mercury into the world one of the most interesting environmental pollutants. The worst in history to be mercury poisoning Minamata disease events in Japan, and it was not the Minamata Bay mercury pollution in water is many hundreds of people died. Now the Japanese government learned a lesson, requiring all of the waste fluorescent lamps treatment of toxic substances must be carried out, requiring people to buy ordinary fluorescent required to pay twice as much advance the toxic substance handling charges.
Recently, the Chinese government issued 100 million free energy-saving lamps, although recent foreign special energy-saving lamps, low mercury content of mercury can be reduced to 5mg or less (do not know the Chinese government is not the case issued energy-saving lamps, low mercury), but no did not reduce its hazardous nature, such as an energy-saving lamps, low mercury content of mercury is enough to 27.27 tons of drinking water pollution. The 100 million energy-saving lamps sufficient to 2.7 billion tons of polluted water, equivalent to the National People's amount of drinking water for years。
Monday, 29 November 2010
Something About Compact Fluorescent Lamps
Compact fluorescent lamps (CFL)
CFLs are becoming increasingly popular in recent years. Its light output ratio of energy consumption is very high compared to their incandescent counterparts waste. Most people are willing to spend extra money on these bulbs only for his life alone. This article is a guide to the understanding of compact fluorescent lamps and why you should use at home to save energy.
What are CFLs and how they work?
A CFL uses a gas-filled tube to excite mercury vapor emissions from short wavelength light. Electromagnetic ballasts or electronic tube connected to regulate the amount of electric current flowing through the device. Former CFL uses electromagnetic ballast, but only use CFL ballast new mail. The switch to electronic ballasts in the last 10 years has been the main reason for the reduction in the cost of CFLs. Without going into technical details, we know that a compact fluorescent lamp is a relatively complex device compared to an incandescent lamp (which is just a tungsten wire heated by electric current). CFLs are capable of operating with AC power systems and DC, making them ideal for 'off-network and remote applications.
Energy Saving
Tube filled with mercury gas emits light energy at a frequency of visible light very specific (usually described in the package). Since only emits energy in the visible light spectrum, the energy is not wasted on the frequencies that the human eye can not see. This is the case with incandescent bulbs, where most of the radiated energy is lost as heat. So emits only useful energy (visible light), compact fluorescent lamps are capable of significantly reducing the amount of energy used in the profits.
A 15W CFL emits the same amount of visible light a 60W incandescent bulb. This means that you will use about a quarter of the energy for the same amount of light! This is a massive energy savings and can save you hundreds of dollars each month.
For example. If you have a family home that uses 8, 60W bulbs. Now let's say the lights are on average 40% of the time. If you are paying 12cents / kWh (U.S. The average cost of electricity). Then, you have to pay $ 142 a month just for the lights with incandescent bulbs. This is reduced to $ 35 a month by making the switch to 15W CFL. That's a savings of $ 107 in a typical U.S. household.
Lifespan
Because CFLs do not produce too much heat as incandescent bulbs, which take longer to burn and die. Will last approximately 10 times with a lifespan of about 10 000 hours.
Removal and Security
There are some safety concerns associated with CFLs, but if managed properly, pose no risk to you or your family. Since CFLs contain mercury vapor is very important that the bulbs are broken or thrown away. When one stops working CFL set aside until they accumulate more of them. Then down to a local station waste disposal. They have a program to safely recycle the CFL and most of the time this service is completely free.
Conclusion
There is no doubt that compact fluorescent lamps replaced all incandescent bulbs in the near future. Many countries have already made a mandatory requirement of the home. If you are looking to save energy at home this is a big step that requires very little effort. So get rid of the old incandescent bulbs and get to the store and get some compact fluorescent lamps. The extra amount spent on these lamps will save you hundreds of dollars and help save our planet.
T2 CFL,T3 CFL,Reflector CFL
CFLs are becoming increasingly popular in recent years. Its light output ratio of energy consumption is very high compared to their incandescent counterparts waste. Most people are willing to spend extra money on these bulbs only for his life alone. This article is a guide to the understanding of compact fluorescent lamps and why you should use at home to save energy.
What are CFLs and how they work?
A CFL uses a gas-filled tube to excite mercury vapor emissions from short wavelength light. Electromagnetic ballasts or electronic tube connected to regulate the amount of electric current flowing through the device. Former CFL uses electromagnetic ballast, but only use CFL ballast new mail. The switch to electronic ballasts in the last 10 years has been the main reason for the reduction in the cost of CFLs. Without going into technical details, we know that a compact fluorescent lamp is a relatively complex device compared to an incandescent lamp (which is just a tungsten wire heated by electric current). CFLs are capable of operating with AC power systems and DC, making them ideal for 'off-network and remote applications.
Energy Saving
Tube filled with mercury gas emits light energy at a frequency of visible light very specific (usually described in the package). Since only emits energy in the visible light spectrum, the energy is not wasted on the frequencies that the human eye can not see. This is the case with incandescent bulbs, where most of the radiated energy is lost as heat. So emits only useful energy (visible light), compact fluorescent lamps are capable of significantly reducing the amount of energy used in the profits.
A 15W CFL emits the same amount of visible light a 60W incandescent bulb. This means that you will use about a quarter of the energy for the same amount of light! This is a massive energy savings and can save you hundreds of dollars each month.
For example. If you have a family home that uses 8, 60W bulbs. Now let's say the lights are on average 40% of the time. If you are paying 12cents / kWh (U.S. The average cost of electricity). Then, you have to pay $ 142 a month just for the lights with incandescent bulbs. This is reduced to $ 35 a month by making the switch to 15W CFL. That's a savings of $ 107 in a typical U.S. household.
Lifespan
Because CFLs do not produce too much heat as incandescent bulbs, which take longer to burn and die. Will last approximately 10 times with a lifespan of about 10 000 hours.
Removal and Security
There are some safety concerns associated with CFLs, but if managed properly, pose no risk to you or your family. Since CFLs contain mercury vapor is very important that the bulbs are broken or thrown away. When one stops working CFL set aside until they accumulate more of them. Then down to a local station waste disposal. They have a program to safely recycle the CFL and most of the time this service is completely free.
Conclusion
There is no doubt that compact fluorescent lamps replaced all incandescent bulbs in the near future. Many countries have already made a mandatory requirement of the home. If you are looking to save energy at home this is a big step that requires very little effort. So get rid of the old incandescent bulbs and get to the store and get some compact fluorescent lamps. The extra amount spent on these lamps will save you hundreds of dollars and help save our planet.
T2 CFL,T3 CFL,Reflector CFL
Save Money With Compact Fluorescent Bulb
Energy costs are becoming more and more of a deciding factor for buyers to think about when choosing to buy a particular house or condominium on the other. You can get an overview of the energy use of the current owner and the monthly cost in touch with local utilities. As a new owner can be tested to improve the footprint of the house of carbon through the exploration of energy-saving alternatives. A simple and fast way to begin to consider the conversion to compact fluorescent light (CFL)। CFLs are well known to the conservation of energy.
If every household connected only one light at home to compact fluorescent (CFL), more than $ 600 million in energy costs would be saved in one इयर.
What is a compact fluorescent (CFL), and how it works?
Function as a standard fluorescent lamp, but the tube is smaller and folded around to reduce the amount of space it occupies। This compact design allows for use CFL bulbs instead of standard light bulb, incandescent light.
A single 20-watt CFL instead of a 75-watt incandescent bulb will save about 550 kWh over its lifetime. This represents a saving of 500 pounds of coal power and then 1.300 pounds of carbon dioxide emissions.
To understand why CFLs save money in incandescent lights, you have to consider both the purchase and operating costs. For example, when you buy a 75 percent 100-watt incandescent bulb, it is likely to spend $ 6 - $ 8 in electricity over the period that the bulb life of 750 hours.
Meanwhile, a compact fluorescent bulb may cost $ 2 - $ 10 to buy, but you will save a lot in the long term. Most compact fluorescent lamps not only last about 8000-10000 hours, but cost less to run, which means we're going to draw small amounts of money from his pocket and a period of years.
Finally, compact fluorescent lights do not throw out much heat as incandescent bulbs, which actually create more heat than light. This means that CFLs also save money during the summer months, when you're trying to freshen your home.
If every household connected only one light at home to compact fluorescent (CFL), more than $ 600 million in energy costs would be saved in one इयर.
What is a compact fluorescent (CFL), and how it works?
Function as a standard fluorescent lamp, but the tube is smaller and folded around to reduce the amount of space it occupies। This compact design allows for use CFL bulbs instead of standard light bulb, incandescent light.
A single 20-watt CFL instead of a 75-watt incandescent bulb will save about 550 kWh over its lifetime. This represents a saving of 500 pounds of coal power and then 1.300 pounds of carbon dioxide emissions.
To understand why CFLs save money in incandescent lights, you have to consider both the purchase and operating costs. For example, when you buy a 75 percent 100-watt incandescent bulb, it is likely to spend $ 6 - $ 8 in electricity over the period that the bulb life of 750 hours.
Meanwhile, a compact fluorescent bulb may cost $ 2 - $ 10 to buy, but you will save a lot in the long term. Most compact fluorescent lamps not only last about 8000-10000 hours, but cost less to run, which means we're going to draw small amounts of money from his pocket and a period of years.
Finally, compact fluorescent lights do not throw out much heat as incandescent bulbs, which actually create more heat than light. This means that CFLs also save money during the summer months, when you're trying to freshen your home.
Solar LED Light is Necessary For Us
With the rapid development of the economy, we need more and more energy, now the energy shortage has become an important factor that influences the development of China's economy. To develop and use solar energy is a sustainable energy policies in each country. Now the promotion of optoelectronic technology, each country begins to put a lot of money to develop this technology to get more market in the world.
And at the same time under growing pressure from environmental protection, energy saving and environmental protection have become the trend of development in various industries. As inexhaustible clean energy, solar energy is the ideal green energy in the 21st century. The effective method to convert solar energy into electricity by solar photovoltaic power generation technologies. LED emitting diode is a type of component that can convert electricity into visible light. With its features free of pollution, which has already been applied to the lighting in many fields. Therefore, holders of the full advantage of solid state lighting and solar LED light --- LED solar street lighting system and solar LED is the perfect combination of new energy and new light.
green energy resources and sustainable development is an important task in the 21 st century. Today, the government pays much attention to the development of new energy, adequate and reasonable utilization of existing energy. At present, solar energy technology and industry semiconductor lighting has taken a step in the commercialization phase. relative product has been applied to street lighting, traffic signal lighting, night lighting and decor of the patio. Through analysis of the feasibility and technical characteristics, we believe that the solar system solar street light will be developed with unprecedented speed, which leads to a new era of green energy.
Solar LED Light has proven to be most appropriate when used to light the street in recent years: most of their land rectangle used in the field of road lighting valid. In the same condition, the LED street save 50% -60% power of the traditional HPS lamp, even more IRC, which is more suitable for night lighting.
And at the same time under growing pressure from environmental protection, energy saving and environmental protection have become the trend of development in various industries. As inexhaustible clean energy, solar energy is the ideal green energy in the 21st century. The effective method to convert solar energy into electricity by solar photovoltaic power generation technologies. LED emitting diode is a type of component that can convert electricity into visible light. With its features free of pollution, which has already been applied to the lighting in many fields. Therefore, holders of the full advantage of solid state lighting and solar LED light --- LED solar street lighting system and solar LED is the perfect combination of new energy and new light.
green energy resources and sustainable development is an important task in the 21 st century. Today, the government pays much attention to the development of new energy, adequate and reasonable utilization of existing energy. At present, solar energy technology and industry semiconductor lighting has taken a step in the commercialization phase. relative product has been applied to street lighting, traffic signal lighting, night lighting and decor of the patio. Through analysis of the feasibility and technical characteristics, we believe that the solar system solar street light will be developed with unprecedented speed, which leads to a new era of green energy.
Solar LED Light has proven to be most appropriate when used to light the street in recent years: most of their land rectangle used in the field of road lighting valid. In the same condition, the LED street save 50% -60% power of the traditional HPS lamp, even more IRC, which is more suitable for night lighting.
Future of LED Light
With respect to lighting, the buzzwords now are "energy saving", so as the GU10 bulbs LED light bulb is listed as the next major revolution in the lighting industry. The future is certainly bright for LED lights from the United States decreed the death of the energy hogging incandescent bulbs.
The traditional incandescent light bulb was invented more than a hundred years and came to dominate our homes. In the 1930's, fluorescent lighting was removed - but only in offices, hospitals or supermarkets - they were too bright and efficient for domestic use. Since then, the lighting industry remained dormant until recently. With more government legislation and increasing pressure from activists and consumers, a major shift has occurred towards energy saving devices. And lighting, LED technology is the greenest way to illuminate a room.
LED already has a dominant role in the lighting of the place, including bike lights and electronics, but the industry is preparing for a boom thanks to changing technology and consumer-friendly attributes. In addition to using much less energy, LED bulbs last five years around the use of the clock - at least 50,000 hours before needing replacement. Consumers will undoubtedly start voting with their feet by choosing significantly more efficient LEDs that save money and help the environment.
Long duration, energy saving bulbs LED is said to "represent the future." According to experts, is simply a truism. The high quality LED manufacturers are preparing for increased demand. The lights have been around for some time, and are often used in stylized designs to luxurious pads - but there is a big difference in quality with poor lights of colors giving a faded appearance. LED high-end designers are highly coveted as silicon technology based on dramatically reduces energy waste, to the extent that countries like Canada have decided to ban incandescent bulbs will come into force in 2012.
And the major lighting brands have reported triple-digit growth in the market. By 2015, some industry analysts have predicted that 50% of lighting sold throughout Europe and America will be LED, with that figure reaching a staggering 80% in 2020. LED bulbs may have a slightly higher price to other alternatives such as halogen, but they have proven to be a longer term, the money-saving investment.
Thursday, 11 November 2010
Germany announced energy-saving lamps need to use eco-labels
Recently, the German consumer associations and the federal EPA announced that, in order to facilitate the consumers to more easily identify and purchase Energy Saving Lamp, energy-saving lighting products in the packaging business, you must use the Blue Angel eco-labeling pattern. This is established by the European Commission will be formally implemented on September 1st light home use of the second revised draft.
It is understood that the “Blue Angel” label not only describes the characteristics of energy-saving lamps, features and other basic problems, but also describes the performance and health protection of its ecological performance, far above the legal requirements of the product labeling standards.
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