LED lighting applications and prospects

1. Summarize

According to statistics, Shanghai expo park used 1.03 billion LED chip，LED chips appear in the indoor and outdoor lighting, landscape decoration, signs and the information display screen of the expo site. World expo venue in indoor lighting source using about 80% the LED green light source, through the deduction of creative concept design and technology, LED lighting brings visitors to unprecedented visual experience, make the entire park becomes the greatest concentration of semiconductor lighting technology application demonstration area in the world. Such a large concentration of application raised the LED’s mysterious veil to the general public.

Leds is the abbreviation of English light – emitting diode (light emitting diode), Leds invented in the 1960 s, in the following decades, the basic purpose as the light on the electronic equipment. For a long time, people not to use the LED lighting, mainly because of the original LED only emit red light or yellow light, no blue light LED, after mixing red, green, blue three colored light, can produce white light. In addition, due to the single power can’t be a big LED, usually only a few watts, cannot meet the requirements of Luminous intensity of illumination. After decades of development, now these problems have been resolved, the LED as a new type of green lighting products into people’s life, become a new star in the field of lighting.

2. Characteristics of LED lighting lamps and lanterns

1) The energy saving effect of LED is excellent. With unidirectional radiation characteristics of LED, most of the light emitted from it do not need reflection can be reached by directly as the object, the energy conversion efficiency is very high, in theory, compared with incandescent lamp can reach 90% of the energy saving, compared with the fluorescent lamp also can reach 50% of the energy saving effect. In addition, due to the power grid voltage is higher in the night, making the traditional light source, the higher the energy consumption of the night. But normally LED constant current drive, the power size doesn’t change with power supply voltage, it is also the energy saving.

2) High luminous efficiency of leds. In theory the LED luminous efficiency can reach more than 300 lm /W. If calculated at 150 lm/W luminous efficiency, comparing with other light source, the LED luminous efficiency of the color rendering is raised after the fluorescent lamp is about 1.7 times, 11.5 times for incandescent, even more than the generally believed that the highest luminous efficiency of high pressure sodium lamp(Luminous efficiency is 132 lm/W)

3) The long service life, stable performance of led.  Now the good LED brand, its life (that is, the average trouble-free working time) can be up to 50, 000 h, more than 20 times that of incandescent lamp, fluorescent lamp 10 times. If you work every day 11 h, usable and l2 years.

4) Green environmental protection. LED light source has good monochromaticity, flicker-free, no ultraviolet radiation, thermal radiation is extremely low, no harm to human eyes. Currently most of the lighting source contains mercury, the light source Abandoned after can cause pollution to the environment, especially disposed fluorescent lamp, mercury lamp in the overflow to the environment and water may be long and serious pollution. And LED light source does not contain mercury and other toxic and harmful substances, can almost all its waste can be recycling, this not only save resources, but also protect the environment. Therefore, the application of LED light source is beneficial to environmental protection.

5) The color rendering index of LED is high, can amount to 80%, very close to natural light. Under the light of it, people can better distinguish objects of different colors, faster recognition of moving objects, so it is especially suitable for indoor lighting and outdoor road lighting.

6) Applicability. Small volume, each unit of LED is 3 ~ 5 dice 1 Tim’s square, can be prepared into various shapes of components, power size also can be arbitrary set of lamps and lanterns, suitable for variable environment.

7) Other advantages. Short response time (nanoseconds, incandescent lamp for millisecond), concentrated beam, impact resistance, resistance to vibration.

3. Scope of application

In the LED lighting lamps and lanterns, lamp, pendent lamp, projection lamp, etc have adornment effect, reflection uses the LED lighting lamps and lanterns can fully competent in any occasion, including art galleries, museums, such as higher requirements on the color of the place. But for shopping malls, office buildings and other large-scale facilities, though as big scale illumination LED lamps and lanterns has been born, but its directivity (LED chip light is a straight line, divergent bad) is too high and caused extensive design within the average illuminance is difficult. Tube type LED lighting lamps and lanterns is arranged too close, design cost is too high, lose the energy saving effect. So, the decoration use occasions, LED lighting lamps and lanterns is fully available, large area interior lighting is not yet mature.

4. Application field

1) The signal applied: Signal light is monochromatic light LED application more widely is a field of earlier, about 4% of the LED application market.

2) According to the application: Signs, billboards, large screen display, etc, the application of LED display screen for about 20%-25% of the LED application, the screen can be divided into monochrome and color.

3) Lighting applications:

①    Portable lamps and lanterns: Scuba diving flashlight, headlamp, miner lamp, lamp and so on.

②    Auto lamp：High brake lights, brake lights, turn light and back light, high power leds have been used in the automotive lighting.

③    Special lighting：Solar garden light, solar street lights, underwater lights and so on, Because of  the small size of the LED, convenient for dynamic brightness and color control, therefore more suitable for use in building decoration lighting.

④    The backlit: Ordinary electronic equipment function display back light, laptop back light source, light source through the large size large size LCD display, etc, LED as a mobile phone display back light is the most widely used field of LED.

⑤    The projection light source: A projector with RGB light source

⑥    General lighting: All kinds of general lighting lamps and lanterns, lighting light source, etc

5. LED lighting lamps and lanterns has  wide prospect of market

(一)  The international market demand

As a lighting source in the future, LED lighting lamps and lanterns of global demand will grow rapidly. The world made the relevant laws and regulations to ban the use of incandescent lamp. As the incandescent light bulb in the world’s major consumer market of lamps and lanterns of phasing out and the promoting of LED lighting lamps and lanterns, green, environmental protection, energy saving of  the LED lamps and lanterns will usher in rapid development period.

(二)  Booming domestic market

Development of LED lighting conforms to our country industry development strategy, our country attaches great importance to the development of semiconductor industry, have issued a series of policies, promote the development of relevant industries. National semiconductor lighting project research and development and industry alliance, according to the data provided by the growth of semiconductor lighting products is significantly higher than that in 2009 China’s lighting industry average level, the growth of its industrial output value reached 60 billion yuan, sales grow by more than 30% over the previous year, make our country become the global LED industry one of the fastest growing areas. What’s more , LED industry and actively involved in various capital investment, industrial investment and capacity expansion of accelerating, only in the first half of 2009, across the country have horse LED the project total investment budget has more than 20 billion yuan. Currently, China LED lighting manufacturing enterprises more than 3000, has already formed the basic complete industrial chain, and initially formed in the pearl river delta, long-horned chuan, to the north, jiang xi and fu jian area four regions, each region has initially formed a complete industrial chain, more than 85% of the LED enterprise distribution in these areas. The analysis of relevant institutions in 2010, the LED lighting industry output value will be more than 1 50 billion yuan, is three times as many as 2008. Expected in 2015, LED lighting market share will reach 20% in China, drive the industry scale of 5, 00 billion yuan, China will enter the top three global LED lighting market.

According to statistics, Shanghai expo park used 1.03 billion LED chip，LED chips appear in the indoor and outdoor lighting, landscape decoration, signs and he information display screen of the expo site. World expo venue in indoor lighting source using about 80% the LED green light source, Through the deduction of creative concept design and technology, LED lighting brings visitors to unprecedented visual experience, make the entire park becomes the greatest concentration of semiconductor lighting technology application demonstration area in the world. Such a large concentration of application raised the LED’s mysterious veil to the general public.

LEDs is the abbreviation of English light – emitting diode (light emitting diode), LEDs invented in the 1960 s, in the following decades, the basic purpose as the light on the electronic equipment. For a long time, people not to use the LED lighting, mainly because of the original LED only emit red light or yellow light, no blue light LED, after mixing red, green, blue three colored light, can produce white light. In addition, due to the single power can’t be a big LED, usually only a few watts, cannot meet the requirements of lighting intensity of illumination. After decades of development, now these problems have been resolved, the LED as a new type of green lighting products into people’s life, become a new star in the field of lighting.

2. Characteristics of LED lighting lamps and lanterns

1) The energy saving effect of LED is excellent. With unidirectional radiation characteristics of LED, most of the light emitted from it do not need reflection can be reached by directly as the object, the energy conversion efficiency is very high, in theory, compared with incandescent lamp can reach 90% of the energy saving, compared with the fluorescent lamp also can reach 50% of the energy saving effect. In addition, due to the power grid voltage is higher in the night, making the traditional light source, the higher the energy consumption of the night. But normally LED constant current drive, the power size doesn’t change with power supply voltage, it is also the energy saving.

2) High luminous efficiency of leds. In theory the LED luminous efficiency can reach more than 300 lm /W. If calculated at 150 lm/W luminous efficiency, comparing with other light source, the LED luminous efficiency of the color rendering is raised after the fluorescent lamp is about 1.7 times, 11.5 times for incandescent, even more than the generally believed that the highest luminous efficiency of high pressure sodium lamp(Luminous efficiency is 132 lm/W)

3) The long service life, stable performance of led.  Now the good LED brand, its life (that is, the average trouble-free working time) can be up to 50, 000 h, more than 20 times that of incandescent lamp, fluorescent lamp 10 times. If you work every day 11 h, usable and l2 years.

4) Green environmental protection. LED light source has good monochromaticity, flicker-free, no ultraviolet radiation, thermal radiation is extremely low, no harm to human eyes. Currently most of the lighting source contains mercury, the light source Abandoned after can cause pollution to the environment, especially disposed fluorescent lamp, mercury lamp in the overflow to the environment and water may be long and serious pollution. And LED light source does not contain mercury and other toxic and harmful substances, can almost all its waste can be recycling, this not only save resources, but also protect the environment. Therefore, the application of LED light source is beneficial to environmental protection.

5) The color rendering index of LED is high, can amount to 80%, very close to natural light. Under the light of it, people can better distinguish objects of different colors, faster recognition of moving objects, so it is especially suitable for indoor lighting and outdoor road lighting.

6) Applicability. Small volume, each unit of LED is 3 ~ 5 dice 1 Tim’s square, can be prepared into various shapes of components, power size also can be arbitrary set of lamps and lanterns, suitable for variable environment.

7) Other advantages. Short response time (nanoseconds, incandescent lamp for millisecond), concentrated beam, impact resistance, resistance to vibration.

3. Scope of application

In the LED lighting lamps and lanterns, lamp, pendent lamp, projection lamp, etc, have adornment effect, reflection uses the LED lighting lamps and lanterns can fully competent in any occasion, including art galleries, museums, such as higher requirements on the color of the place. But for shopping malls, office buildings and other large-scale facilities, though as big scale illumination LED lamps and lanterns has been born, but its directivity (LED chip light is a straight line, divergent bad) is too high and caused extensive design within the average illuminance is difficult. Tube type LED lighting lamps and lanterns is arranged too close, design cost is too high, lose the energy saving effect. So, the decoration use occasions, LED lighting lamps and lanterns is fully available, large area interior lighting is not yet mature.

4. Application field

1) The signal applied: Signal light is monochromatic light LED application more widely is a field of earlier, about 4% of the LED application market.

2) According to the application: Signs, billboards, large screen display, etc., the application of LED display screen for about 20%-25% of the LED application, the screen can be divided into monochrome and color.

3) Lighting applications:

①    Portable lamps and lanterns: Scuba diving flashlight, headlamp, miner lamp, lamp and so on.

②    Auto lamp：High brake lights, brake lights, turn light and back light, high power leds have been used in the automotive lighting.

③    Special lighting：Solar garden light, solar street lights, underwater lights and so on, Because of  the small size of the LED, convenient for dynamic brightness and color control, therefore more suitable for use in building decoration lighting.

④    The backlit: Ordinary electronic equipment function display back light, laptop back light source, light source through the large size large size LCD display, etc, LED as a mobile phone display back light is the most widely used field of LED.

⑤    The projection light source: A projector with RGB light source

⑥    General lighting: All kinds of general lighting lamps and lanterns, lighting light source, etc

5. LED lighting lamps and lanterns has  wide prospect of market

(一)  The international market demand

As a lighting source in the future, LED lighting lamps and lanterns of global demand will grow rapidly. The world made the relevant laws and regulations to ban the use of incandescent lamp. As the incandescent light bulb in the world’s major consumer market of lamps and lanterns of phasing out and the promoting of LED lighting lamps and lanterns, green, environmental protection, energy saving of  the LED lamps and lanterns will usher in rapid development period.

(二)  Booming domestic market

Development of LED lighting conforms to our country industry development strategy, our country attaches great importance to the development of semiconductor industry, have issued a series of policies, promote the development of relevant industries. National semiconductor lighting project research and development and industry alliance, according to the data provided by the growth of semiconductor lighting products is significantly higher than that in 2009 China’s lighting industry average level, the growth of its industrial output value reached 60 billion yuan, sales grow by more than 30% over the previous year, make our country become the global LED industry one of the fastest growing areas. What’s more , LED industry and actively involved in various capital investment, industrial investment and capacity expansion of accelerating, only in the first half of 2009, across the country have horse LED the project total investment budget has more than 20 billion yuan. Currently, China LED lighting manufacturing enterprises more than 3000, has already formed the basic complete industrial chain, and initially formed in the pearl river delta, long-horned chuan, to the north, jiang xi and fu jian area four regions, each region has initially formed a complete industrial chain, more than 85% of the LED enterprise distribution in these areas. The analysis of relevant institutions in 2010, the LED lighting industry output value will be more than 1 50 billion yuan, is three times as many as 2008. Expected in 2015, LED lighting market share will reach 20% in China, drive the industry scale of 5, 00 billion yuan, China will enter the top three global LED lighting market.

Tags：color rendering index of LED , LED Lighting , LED luminous efficiency , Luminous intensity