Industry insiders believe that after several years of exploration and development of LED road lighting, the market has continued to grow steadily through the accumulation of technology and product improvements in the application process, and its development opportunities have re-emerged. Recently, many technical experts and business executives gathered to discuss how LEDs can be better applied to road lighting, from the aspects of use environment, optimization design, consumer experience, and how to scientifically evaluate LED light sources. Safe and more comfortable road lighting environment. From this, we can feel that LED road lighting technology and product applications have taken a big step forward in a more in-depth and humanized direction.
Optoelectronics Institute of Taiwan Institute of Optoelectronics optoelectronic components and system application group Zhu Mudao optimized design to meet the eye comfort requirements LED road lighting products need to follow the relevant road lighting technical specifications to meet the ground illumination and regional brightness and other related requirements. LED manufacturers are concerned about the efficiency of light extraction, but for users, the ultimate concern is the quality of the light that people's eyes feel in a specific environment. There is a conversion factor between light extraction efficiency and light quality. This factor is Environment-related, so a lot of specific investigation and research work needs to be done before installation of road lighting products, it is impossible to apply a specification everywhere.
LED lighting products should be highly integrated with the needs of users on the basis of a deep understanding of the physical characteristics of LED light sources, such as the combination of human eye and light perception, combined with the use of the environment to develop a truly humanized lighting products, and Reasonable optical design is an important aspect.
Several commonly used optical design methods mainly include: (1) The use of structural methods to adjust the light type, that is, the light source cells are arranged into a plate array, and then the light plate tilting device is adjusted to the desired light type distribution. The biggest advantage of this kind of optical design is that the cost is very low, but it is not easy to achieve higher light quality. Of course, the monomers can be tilted to different degrees with each other, so that the superimposed light pattern conforms to the street lamp. demand. (2) Using secondary optics design, using a single external optical design element, such as a reflector or lens, to achieve the required light distribution. In this way, the monomer can be standardized and has high elasticity, which can separate the LED monomer from the optical design, so that the design is more flexible, so as to meet the environmental requirements of different roads. (3) The primary optical element is used to directly direct the light output from the single element to the desired distribution form on the LED single body. This design can reduce the inconvenience in the structural design. The asymmetrical distribution in the direction of the road surface can be achieved by using the tilt of the light board or the light source lens design, so that the integration can be simplified, but the design cost and the manufacturing cost are high. (4) The use of light guide devices is only found in patents, but the product has not yet been used. This design method has large optical loss but is easy to maintain and can meet higher light quality requirements. In the future, road lighting needs to integrate these technologies. At the same time, it will also introduce command and control technologies and network management technologies.
Philips (China) Investment Co., Ltd. Philips Research Institute of Shanghai Institute of Lighting Systems and Applications Senior Researcher Zhu Xiaoyan's survey shows that warm white 3000K LED street lamps are more comfortable When it comes to the challenges of LED road lighting, we often refer to the challenges of product quality, such as Life, reliability, light failure, and return on investment. However, products are for lighting services. The end user is concerned about glare, whether the sidewalk is too dark, whether white light is comfortable, and whether the illumination is high enough. Energy saving is not only the energy saving of the product itself, but also the energy saving of the application effect. It is a comprehensive consideration index based on a safe and comfortable lighting environment.
Road lighting is for road safety services. First, it needs to meet the basic needs of safety. Safety is related to visual functions, which involve factors such as reaction time, perceived rate, disability glare (TI) and face recognition. Secondly, comfort needs to be further considered. Visual comfort involves factors such as color temperature, average brightness/illuminance, brightness (illuminance) uniformity, glare, and environment ratio.
Philips did a lot of research on the visual comfort of LED road lighting, such as the LED street lighting sensory evaluation experiment in Apeldoorm, the Netherlands, the outdoor warm white lighting effect user feeling evaluation test in Lyon, France, and the outdoor warm white lighting in Suzhou, China. The effect of user perception evaluation tests, the influence of color temperature on the uncomfortable glare of road lighting in Shanghai, etc.
According to respondents’ feedback, LED street lighting can be actively accepted because LEDs are energy-efficient, sustainable light sources. LEDs are expected to improve the visual and security of lighting. New products with innovative designs are always subject to welcome. In general, lighting fixtures and effects are easily recognized when the contrast between street and sidewalk illumination is relatively small. In general, warm-colored LEDs are considered to be comfortable. Of course, LED road lighting is also facing some criticism: If the lighting source is too bright, the glare is serious, the light is too strong and dazzling, and it will interfere with sight and sightlines.
The experimental results show that warm white light (3000K) is less comfortable and more comfortable than cold white light (6500K). LED road lighting warm white light is preferred, but just considering it is not enough. The low contrast of sidewalks and lanes is more popular. The lowest acceptable illuminance range on the sidewalks is >1.3 Lux, the most acceptable shade contrast is 40% to 50%, and the illumination of the sidewalks and building facades directly affects people. The sense of security and comfort. Therefore, for road lighting, it is important to increase the illumination ratio of sidewalks and lanes.
Relevant literature and cases show that road-lighting light sources using daylight metal halide lamps are too cold in visual perception, white light without warm colors feels good, and there is no golden yellow for HPS (high pressure sodium lamps); daylight white light shines far away , The eye's ability to observe decreased, is not suitable for farsightedness, farsightedness is best to use warm white light; suitable for road lighting light color should be HPS light golden light or warm white light; in terms of light color, with daylight LED It is not appropriate to make street lights.
Therefore, through experimental feedback and theoretical research, it can be found that for LED road lighting light color, cool white light is an expedient choice for the market, and warm white light is the correct direction of LED road lighting. With the progress of warm white light technology, LED will better solve the contradiction between comfort and energy saving.
Zhou Lujun, Chief Marketing Officer of Philips Lumileds Lighting Company, LED road lighting market opportunities reappear 2011 Compared with 2010 and 2009, the LED street lighting market shows steady development status and trends. On the one hand, the industry's expectations for the road lighting market are not As high as it used to be, the forecast for demand has returned to a more rational attitude. On the other hand, through the application and exploration of previous years, LED road lighting products have gradually matured and the cost has continued to decline, which has re-emerged the LED street lighting market.
From the analysis of the factors that promote the development of the LED street lamp market, the current conservative view is that the chip price will decline by about 5% every three months. The recovery cycle of the entire system cost will be approached within 3-4 years. The price decline is very critical for the market to start. Although the central government is unlikely to have a very significant subsidy policy for road lighting in the future. In addition, in the EMC business model, because most domestic investment companies require high returns, long payback periods often become the main factor restricting the implementation of the EMC model. However, with the entry of overseas funds, their requirements for return on investment are relatively low. Under the circumstances that the investment return period is gradually shortened, those EMC companies with overseas capital backgrounds will be active. In addition, the output value of LED street lamps in 2012 is expected to account for 50% of the entire street lamp market. Local governments play a very important role in market promotion. Third and fourth tier cities are often more active than tier one and tier two cities. Contrary to the earlier conservative attitude of street lamp management departments, the street lamp management departments in some regions have begun to use LED road lighting products on a large scale. Finally, the acceleration of urbanization will also stimulate the demand for LED road lighting.
With the start of the tunnel lighting market earlier, a basically stable market pattern has been formed. There are not many national brands in the LED street lighting market. Most of them are based on regional brands. Therefore, there are still certain developments for related companies. space. At present, many LED street lighting companies have begun to pay more attention to more user-friendly lighting demand factors such as standard applications, light distribution quality, and visual comfort.
Optoelectronics Institute of Taiwan Institute of Optoelectronics optoelectronic components and system application group Zhu Mudao optimized design to meet the eye comfort requirements LED road lighting products need to follow the relevant road lighting technical specifications to meet the ground illumination and regional brightness and other related requirements. LED manufacturers are concerned about the efficiency of light extraction, but for users, the ultimate concern is the quality of the light that people's eyes feel in a specific environment. There is a conversion factor between light extraction efficiency and light quality. This factor is Environment-related, so a lot of specific investigation and research work needs to be done before installation of road lighting products, it is impossible to apply a specification everywhere.
LED lighting products should be highly integrated with the needs of users on the basis of a deep understanding of the physical characteristics of LED light sources, such as the combination of human eye and light perception, combined with the use of the environment to develop a truly humanized lighting products, and Reasonable optical design is an important aspect.
Several commonly used optical design methods mainly include: (1) The use of structural methods to adjust the light type, that is, the light source cells are arranged into a plate array, and then the light plate tilting device is adjusted to the desired light type distribution. The biggest advantage of this kind of optical design is that the cost is very low, but it is not easy to achieve higher light quality. Of course, the monomers can be tilted to different degrees with each other, so that the superimposed light pattern conforms to the street lamp. demand. (2) Using secondary optics design, using a single external optical design element, such as a reflector or lens, to achieve the required light distribution. In this way, the monomer can be standardized and has high elasticity, which can separate the LED monomer from the optical design, so that the design is more flexible, so as to meet the environmental requirements of different roads. (3) The primary optical element is used to directly direct the light output from the single element to the desired distribution form on the LED single body. This design can reduce the inconvenience in the structural design. The asymmetrical distribution in the direction of the road surface can be achieved by using the tilt of the light board or the light source lens design, so that the integration can be simplified, but the design cost and the manufacturing cost are high. (4) The use of light guide devices is only found in patents, but the product has not yet been used. This design method has large optical loss but is easy to maintain and can meet higher light quality requirements. In the future, road lighting needs to integrate these technologies. At the same time, it will also introduce command and control technologies and network management technologies.
Philips (China) Investment Co., Ltd. Philips Research Institute of Shanghai Institute of Lighting Systems and Applications Senior Researcher Zhu Xiaoyan's survey shows that warm white 3000K LED street lamps are more comfortable When it comes to the challenges of LED road lighting, we often refer to the challenges of product quality, such as Life, reliability, light failure, and return on investment. However, products are for lighting services. The end user is concerned about glare, whether the sidewalk is too dark, whether white light is comfortable, and whether the illumination is high enough. Energy saving is not only the energy saving of the product itself, but also the energy saving of the application effect. It is a comprehensive consideration index based on a safe and comfortable lighting environment.
Road lighting is for road safety services. First, it needs to meet the basic needs of safety. Safety is related to visual functions, which involve factors such as reaction time, perceived rate, disability glare (TI) and face recognition. Secondly, comfort needs to be further considered. Visual comfort involves factors such as color temperature, average brightness/illuminance, brightness (illuminance) uniformity, glare, and environment ratio.
Philips did a lot of research on the visual comfort of LED road lighting, such as the LED street lighting sensory evaluation experiment in Apeldoorm, the Netherlands, the outdoor warm white lighting effect user feeling evaluation test in Lyon, France, and the outdoor warm white lighting in Suzhou, China. The effect of user perception evaluation tests, the influence of color temperature on the uncomfortable glare of road lighting in Shanghai, etc.
According to respondents’ feedback, LED street lighting can be actively accepted because LEDs are energy-efficient, sustainable light sources. LEDs are expected to improve the visual and security of lighting. New products with innovative designs are always subject to welcome. In general, lighting fixtures and effects are easily recognized when the contrast between street and sidewalk illumination is relatively small. In general, warm-colored LEDs are considered to be comfortable. Of course, LED road lighting is also facing some criticism: If the lighting source is too bright, the glare is serious, the light is too strong and dazzling, and it will interfere with sight and sightlines.
The experimental results show that warm white light (3000K) is less comfortable and more comfortable than cold white light (6500K). LED road lighting warm white light is preferred, but just considering it is not enough. The low contrast of sidewalks and lanes is more popular. The lowest acceptable illuminance range on the sidewalks is >1.3 Lux, the most acceptable shade contrast is 40% to 50%, and the illumination of the sidewalks and building facades directly affects people. The sense of security and comfort. Therefore, for road lighting, it is important to increase the illumination ratio of sidewalks and lanes.
Relevant literature and cases show that road-lighting light sources using daylight metal halide lamps are too cold in visual perception, white light without warm colors feels good, and there is no golden yellow for HPS (high pressure sodium lamps); daylight white light shines far away , The eye's ability to observe decreased, is not suitable for farsightedness, farsightedness is best to use warm white light; suitable for road lighting light color should be HPS light golden light or warm white light; in terms of light color, with daylight LED It is not appropriate to make street lights.
Therefore, through experimental feedback and theoretical research, it can be found that for LED road lighting light color, cool white light is an expedient choice for the market, and warm white light is the correct direction of LED road lighting. With the progress of warm white light technology, LED will better solve the contradiction between comfort and energy saving.
Zhou Lujun, Chief Marketing Officer of Philips Lumileds Lighting Company, LED road lighting market opportunities reappear 2011 Compared with 2010 and 2009, the LED street lighting market shows steady development status and trends. On the one hand, the industry's expectations for the road lighting market are not As high as it used to be, the forecast for demand has returned to a more rational attitude. On the other hand, through the application and exploration of previous years, LED road lighting products have gradually matured and the cost has continued to decline, which has re-emerged the LED street lighting market.
From the analysis of the factors that promote the development of the LED street lamp market, the current conservative view is that the chip price will decline by about 5% every three months. The recovery cycle of the entire system cost will be approached within 3-4 years. The price decline is very critical for the market to start. Although the central government is unlikely to have a very significant subsidy policy for road lighting in the future. In addition, in the EMC business model, because most domestic investment companies require high returns, long payback periods often become the main factor restricting the implementation of the EMC model. However, with the entry of overseas funds, their requirements for return on investment are relatively low. Under the circumstances that the investment return period is gradually shortened, those EMC companies with overseas capital backgrounds will be active. In addition, the output value of LED street lamps in 2012 is expected to account for 50% of the entire street lamp market. Local governments play a very important role in market promotion. Third and fourth tier cities are often more active than tier one and tier two cities. Contrary to the earlier conservative attitude of street lamp management departments, the street lamp management departments in some regions have begun to use LED road lighting products on a large scale. Finally, the acceleration of urbanization will also stimulate the demand for LED road lighting.
With the start of the tunnel lighting market earlier, a basically stable market pattern has been formed. There are not many national brands in the LED street lighting market. Most of them are based on regional brands. Therefore, there are still certain developments for related companies. space. At present, many LED street lighting companies have begun to pay more attention to more user-friendly lighting demand factors such as standard applications, light distribution quality, and visual comfort.
The driver IC is placed on the led strip, and the lad strip and the Driver IC are each formed into a separate body.
The advantage is that the circuits are dispersed and the external circuits are self-contained, which reduces complex circuit design and reduces internal components.
At the same time, the failure rate is also reduced, and the performance of the led strip is more stable.
The rate of non-performing is greatly reduced. The three primary colors of each pixel can achieve 256 levels of brightness display,
serial cascade interface, and can receive and decode data through signal lines. The color of the light is highly consistent and cost-effective.
Generally used for LED full color luminous word string, LED full color module, LED full color soft light strip hard light strip, Led Pixel Screen, LED shaped screen and so on.
It is one of the most common ribbons on the market. The signal is stable and suitable for large-scale engineering design.
Extraposition Digital Led Strip
Digital RGB LED Strip,Digital LEDTape,5050RGB LED,Extraposition Digital LED Strip
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