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About the development of semiconductor LED lighting (2)
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About the development of semiconductor LED lighting (2)

(Summary description) LED future technology development trend The characteristics of LEDs are small and light, low driving voltage, full color, long life, high efficiency, vibration resistance, and easy light control, which provide excellent conditions for designing lighting systems for different places and purposes. People are accustomed to looking at things in sunlight. For general lighting, people mainly need light sources that are close to the quality of sunlight, so white LEDs are an important indicator of semiconductor lighting technology. Due to the low power and low brightness of a single LED, it is not suitable to be used alone. For this reason, multiple LEDs must be assembled together to design a practical LED lighting system. However, there is still a certain distance between white LEDs and general lighting requirements, and there are still many technical and cost problems that need to be solved urgently. Main technical overview of semiconductor lighting system 1) Thermal management of lighting systems LEDs are generally referred to as cold light sources, because the principle of LED light-emitting is that electrons directly emit photons through recombination without the need for heat. However, due to the existence of Joule heat, LEDs are accompanied by heat while emitting light, and for high-power and multiple LED applications, the heat accumulates and cannot be underestimated. LEDs are different from traditional lighting such as incandescent lamps and fluorescent lamps. Light source, too high temperature will shorten or even terminate its service life. Moreover, LED is a temperature-sensitive device. When the temperature rises, its efficiency drops sharply. Therefore, system structure design and heat dissipation technology development are also issues that LED applications need to face. Since forced air cooling is generally not desirable in light sources, heat sinks and other methods of enhancing natural convection cooling play an increasingly important role in LED lamp and light source designs as input electrical power increases. 2) Improve color rendering At present, white light LEDs generally use blue light-emitting LEDs superimposed with yellow light-emitting yttrium aluminum garnet (YAG) phosphors excited by blue light to synthesize white light. Since its luminescence spectrum only contains blue and yellow spectrums, there are problems of high color temperature and low color rendering index, which do not meet the requirements of general lighting. The sensitivity of the human eye to chromatic aberration is much higher than that of light intensity. For lighting, the color rendering of the light source is often more important than the luminous efficiency. Therefore, adding an appropriate amount of red-emitting phosphor powder and maintaining a high luminous efficiency is an important issue in LED white light illumination. 3) Secondary optical design of lighting system Traditional lamps and lanterns have long used incandescent and fluorescent light sources as reference objects to determine the optical and shape standards of lamps. Therefore, LED lighting systems should consider abandoning traditional lamps and LED light-emitting modules. LED light sources are specially designed for different lamps. The design of the optical system mainly includes the following aspects: ① According to the requirements of lighting objects and luminous flux, determine the shape of the optical system, the number of LEDs and the size of the power; ② Combine several LED light-emitting tubes to design a point light source, a ring light source or For the "secondary light source" of the surface light source, the lighting optical system is calculated according to the combined secondary light source; 3. The control of the light distribution of each LED tube on the "secondary light source" that constitutes the lighting optical system design is very important. Since the light beam emitted by the LED is concentrated, it is easier to control, and no reflector is needed to focus the light, which is beneficial to reduce the depth of the lamp. For example, using a flat mirror optical system, only 1-2 LEDs can be used to illuminate a large surface, and the depth of the lamp is very thin; and using light guide technology, the LED is directly installed next to the light guide, which can greatly reduce the light source and other components. Occupied volume, made into ultra-thin lamps. The above content is edited and reprinted by Nanjing Tansu Optoelectronics www.njtan suo.com Our company is the first company in China to use long strip flameproof LED roadway lights for mine lighting. Also produces LED downlights, LED ceiling lights, LED street lights, LED landscape lights, etc.

About the development of semiconductor LED lighting (2)

(Summary description)

LED future technology development trend

The characteristics of LEDs are small and light, low driving voltage, full color, long life, high efficiency, vibration resistance, and easy light control, which provide excellent conditions for designing lighting systems for different places and purposes. People are accustomed to looking at things in sunlight. For general lighting, people mainly need light sources that are close to the quality of sunlight, so white LEDs are an important indicator of semiconductor lighting technology. Due to the low power and low brightness of a single LED, it is not suitable to be used alone. For this reason, multiple LEDs must be assembled together to design a practical LED lighting system. However, there is still a certain distance between white LEDs and general lighting requirements, and there are still many technical and cost problems that need to be solved urgently.

Main technical overview of semiconductor lighting system

1) Thermal management of lighting systems

LEDs are generally referred to as cold light sources, because the principle of LED light-emitting is that electrons directly emit photons through recombination without the need for heat. However, due to the existence of Joule heat, LEDs are accompanied by heat while emitting light, and for high-power and multiple LED applications, the heat accumulates and cannot be underestimated. LEDs are different from traditional lighting such as incandescent lamps and fluorescent lamps. Light source, too high temperature will shorten or even terminate its service life. Moreover, LED is a temperature-sensitive device. When the temperature rises, its efficiency drops sharply. Therefore, system structure design and heat dissipation technology development are also issues that LED applications need to face. Since forced air cooling is generally not desirable in light sources, heat sinks and other methods of enhancing natural convection cooling play an increasingly important role in LED lamp and light source designs as input electrical power increases.

2) Improve color rendering

At present, white light LEDs generally use blue light-emitting LEDs superimposed with yellow light-emitting yttrium aluminum garnet (YAG) phosphors excited by blue light to synthesize white light. Since its luminescence spectrum only contains blue and yellow spectrums, there are problems of high color temperature and low color rendering index, which do not meet the requirements of general lighting. The sensitivity of the human eye to chromatic aberration is much higher than that of light intensity. For lighting, the color rendering of the light source is often more important than the luminous efficiency. Therefore, adding an appropriate amount of red-emitting phosphor powder and maintaining a high luminous efficiency is an important issue in LED white light illumination.

3) Secondary optical design of lighting system

Traditional lamps and lanterns have long used incandescent and fluorescent light sources as reference objects to determine the optical and shape standards of lamps. Therefore, LED lighting systems should consider abandoning traditional lamps and LED light-emitting modules. LED light sources are specially designed for different lamps. The design of the optical system mainly includes the following aspects: ① According to the requirements of lighting objects and luminous flux, determine the shape of the optical system, the number of LEDs and the size of the power; ② Combine several LED light-emitting tubes to design a point light source, a ring light source or For the "secondary light source" of the surface light source, the lighting optical system is calculated according to the combined secondary light source; 3. The control of the light distribution of each LED tube on the "secondary light source" that constitutes the lighting optical system design is very important.

Since the light beam emitted by the LED is concentrated, it is easier to control, and no reflector is needed to focus the light, which is beneficial to reduce the depth of the lamp. For example, using a flat mirror optical system, only 1-2 LEDs can be used to illuminate a large surface, and the depth of the lamp is very thin; and using light guide technology, the LED is directly installed next to the light guide, which can greatly reduce the light source and other components. Occupied volume, made into ultra-thin lamps.

The above content is edited and reprinted by Nanjing Tansu Optoelectronics www.njtan suo.com

Our company is the first company in China to use long strip flameproof LED roadway lights for mine lighting. Also produces LED downlights, LED ceiling lights, LED street lights, LED landscape lights, etc.


Information

LED future technology development trend

The characteristics of LEDs are small and light, low driving voltage, full color, long life, high efficiency, vibration resistance, and easy light control, which provide excellent conditions for designing lighting systems for different places and purposes. People are accustomed to looking at things in sunlight. For general lighting, people mainly need light sources that are close to the quality of sunlight, so white LEDs are an important indicator of semiconductor lighting technology. Due to the low power and low brightness of a single LED, it is not suitable to be used alone. For this reason, multiple LEDs must be assembled together to design a practical LED lighting system. However, there is still a certain distance between white LEDs and general lighting requirements, and there are still many technical and cost problems that need to be solved urgently.

Main technical overview of semiconductor lighting system

1) Thermal management of lighting systems

LEDs are generally referred to as cold light sources, because the principle of LED light-emitting is that electrons directly emit photons through recombination without the need for heat. However, due to the existence of Joule heat, LEDs are accompanied by heat while emitting light, and for high-power and multiple LED applications, the heat accumulates and cannot be underestimated. LEDs are different from traditional lighting such as incandescent lamps and fluorescent lamps. Light source, too high temperature will shorten or even terminate its service life. Moreover, LED is a temperature-sensitive device. When the temperature rises, its efficiency drops sharply. Therefore, system structure design and heat dissipation technology development are also issues that LED applications need to face. Since forced air cooling is generally not desirable in light sources, heat sinks and other methods of enhancing natural convection cooling play an increasingly important role in LED lamp and light source designs as input electrical power increases.

2) Improve color rendering

At present, white light LEDs generally use blue light-emitting LEDs superimposed with yellow light-emitting yttrium aluminum garnet (YAG) phosphors excited by blue light to synthesize white light. Since its luminescence spectrum only contains blue and yellow spectrums, there are problems of high color temperature and low color rendering index, which do not meet the requirements of general lighting. The sensitivity of the human eye to chromatic aberration is much higher than that of light intensity. For lighting, the color rendering of the light source is often more important than the luminous efficiency. Therefore, adding an appropriate amount of red-emitting phosphor powder and maintaining a high luminous efficiency is an important issue in LED white light illumination.

3) Secondary optical design of lighting system

Traditional lamps and lanterns have long used incandescent and fluorescent light sources as reference objects to determine the optical and shape standards of lamps. Therefore, LED lighting systems should consider abandoning traditional lamps and LED light-emitting modules. LED light sources are specially designed for different lamps. The design of the optical system mainly includes the following aspects: ① According to the requirements of lighting objects and luminous flux, determine the shape of the optical system, the number of LEDs and the size of the power; ② Combine several LED light-emitting tubes to design a point light source, a ring light source or For the "secondary light source" of the surface light source, the lighting optical system is calculated according to the combined secondary light source; 3. The control of the light distribution of each LED tube on the "secondary light source" that constitutes the lighting optical system design is very important.

Since the light beam emitted by the LED is concentrated, it is easier to control, and no reflector is needed to focus the light, which is beneficial to reduce the depth of the lamp. For example, using a flat mirror optical system, only 1-2 LEDs can be used to illuminate a large surface, and the depth of the lamp is very thin; and using light guide technology, the LED is directly installed next to the light guide, which can greatly reduce the light source and other components. Occupied volume, made into ultra-thin lamps.

The above content is edited and reprinted by Nanjing Tansu Optoelectronics www.njtan suo.com

Our company is the first company in China to use long strip flameproof LED roadway lights for mine lighting. Also produces LED downlights, LED ceiling lights, LED street lights, LED landscape lights, etc.

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What are the characteristics of LED roadway lights? Do you know the installation method and precautions? Take a look!

What are the characteristics of LED roadway lights? Do you know the installation method and precautions? Take a look!

  As people's requirements for lamps are getting higher and higher, a new type of lamps called LED lamps are favored by people. LED is a kind of light-emitting diode. As a light source for illuminants, it has high light efficiency and long life. To achieve multi-purpose lighting, and softened, it will not cause dazzling or other uncomfortable reactions, so many public areas will use this kind of light, such as LED roadway lights, because there are many people on the road, so it is necessary to To install soft lamps that will not hurt the eyes, what are the characteristics of LED road lights? Do you know its installation methods and precautions? Let's follow the editor to learn about it.    Features of LED roadway lights: 1. The color purity of LED roadway lamps is high; at present, LED products cover almost the entire visible spectrum range, and the color purity is high. 2. LED roadway lamps have a long life. The actual life of LED is more than 50,000 hours, which is several times or even dozens of times that of general light sources. 3. The light source of LED roadway lamps does not contain mercury, and the light beam does not contain ultraviolet rays. 4. It is solid luminescence, good shock resistance, firm and reliable. 5. It also has the characteristics of energy saving, economical and maintenance-free. 6. LED has strong luminous directionality, high luminous flux utilization rate, and small size, which is easy to design and control light intensity distribution of LED lamps. 7. LED roadway lamps can be powered by DC low voltage, which is safe and reliable. 8. The LED is not limited by the start-up temperature, it can be started temporarily, usually a few ms, and can temporarily achieve full luminous flux output.   Installation method and precautions of LED roadway lights: 1. Installation method: 1. First, determine the installation position and method of the lamps according to the actual needs of the work site, and then prepare the corresponding length of Φ8~Φ14 mm three-core cables according to the distance from the lamps to the power contacts. 2. Open the set screw on the side of the upper cover of the lamp, then loosen the compression nut of the cable inlet of the lamp, open the upper cover, and lead the power cables through the compression nut to the internal terminal, and connect according to the method shown in the figure. Fix it, and then tighten the cable compression nut and the upper cover of the lamp. 3. The LED roadway lights are enclosure-free. If the lamps themselves are not bright, generally communicate with the manufacturer for direct replacement or return to the factory for maintenance. 2. Notes: 1. The power supply must be cut off before dismantling the lamp. 2. It is strictly forbidden to open it with electricity. 3. During use, the surface of the lamp has a certain temperature rise, which is a normal phenomenon; the center of the transparent part has a high temperature and should not be touched. 4. When installing lamps, the lamps should be safely grounded nearby. The above are the characteristics of LED roadway lights, as well as its installation methods and precautions. Relevant staff must pay attention to the problems during installation to ensure their personal safety.
热烈祝贺我司获得《环境管理体系认证证书》!

热烈祝贺我司获得《环境管理体系认证证书》!

Congratulations to our company for obtaining the Occupational Health and Safety Management System Certification!

Congratulations to our company for obtaining the Occupational Health and Safety Management System Certification!

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