It is not unclear to think about the most critical parts of a lighting product. Popularly speaking, it is light distribution, structure, and electronics. The terms of light distribution, structure, and electronics are expressed as: optical properties, thermal properties, and electrical properties. At the same time, the light distribution is particularly important. If you don't understand the light distribution, you can't do well.
Optical performance (light distribution): The optical performance of LEDs mainly involves performance requirements in terms of spectrum, luminosity and chromaticity. According to the newly established industry standard "Semiconductor LED Test Method", there are mainly illuminating peak wavelength, spectral radiance bandwidth, axial illuminance intensity angle, luminous flux, radiant flux, luminous efficiency, chromaticity coordinates, correlated color temperature, color purity and main Wavelength, color rendering index and other parameters. LEDs for display are mainly visual and visual effects, so there is no requirement for the relevant color rendering index. For white LEDs for illumination, color temperature, color rendering index and illuminance are especially important, and it is an important indicator of lighting atmosphere and effect. Color purity and dominant wavelength are generally not required.
At present, the mainstream practice in the global LED industry is to distribute the light when the LED chip is formed into a light source or a light source module, and then the light is distributed when the light is made. This is the practice of the original conventional light source because the conventional light source is 360° light. . If you want to direct light to the application, Philips' traditional lamps are the best, and the light loss is 40%. The optical parameters of the lamps used by many domestic LED downstream manufacturers are actually the optical parameters of the chip or the light source, not the optical index parameters of the overall luminaire.
Now the most advanced scientific method is to do the light distribution on the chip package, and to derive the light of the chip at one time to maintain the maximum light output, so that the light loss rate is only 5%-10%. As technology continues to improve, the light loss rate will be lower and lower, and the light efficiency of the light source will become higher and higher. The same light source luminaires do not need to be equipped with light distribution, and the relative luminaire efficiency will be greatly improved, making it more widely used in functional lighting, forming a considerable market channel. Therefore, a good LED supplier is our top priority. We don't have to spend a lot of money to study how our LEDs go to light distribution. It doesn't take a lot of time and experience to let engineers use software to simulate. The easiest way is to Let LED white light suppliers cooperate. Be aware that if our engineers use software to simulate, the necessary actions are input and output. Input is the data import in the previous period, and the output is the result of the simulation. Then the data in the previous period must be accurate and the simulation of the back end can be correct.
Thermal performance (structure): LED lighting efficiency and power supply for lighting is one of the keys to the LED industry. At the same time, the PN junction temperature of the LED and the heat dissipation of the housing are particularly important. The greater the difference between the PN junction temperature and the lamp body temperature, the greater the thermal resistance, and the conversion of the light energy into thermal energy is consumed in vain, and the LED is damaged in severe cases. A good structural engineer should not only consider the structure of the luminaire and the thermal resistance of the LED, but also consider whether the shape of the luminaire is reasonable, fashionable, novel, and of course reliability, maintainability and practicality, that is, to stand by the designer. From the perspective of the user, we must consider the product from the perspective of the user...
At present, upstream dragon companies, such as CREE, can achieve a chip light efficiency of 130-150 lm / W. However, the LED junction temperature directly affects the LED light extraction efficiency, device lifetime, reliability, and emission wavelength. Keeping the LED junction temperature within the allowable range is a key factor that must be studied in every aspect of high-power LED chip fabrication, device packaging and device applications, especially the core issues that must be addressed in LED device packaging and device application design.
Optical performance (light distribution): The optical performance of LEDs mainly involves performance requirements in terms of spectrum, luminosity and chromaticity. According to the newly established industry standard "Semiconductor LED Test Method", there are mainly illuminating peak wavelength, spectral radiance bandwidth, axial illuminance intensity angle, luminous flux, radiant flux, luminous efficiency, chromaticity coordinates, correlated color temperature, color purity and main Wavelength, color rendering index and other parameters. LEDs for display are mainly visual and visual effects, so there is no requirement for the relevant color rendering index. For white LEDs for illumination, color temperature, color rendering index and illuminance are especially important, and it is an important indicator of lighting atmosphere and effect. Color purity and dominant wavelength are generally not required.
At present, the mainstream practice in the global LED industry is to distribute the light when the LED chip is formed into a light source or a light source module, and then the light is distributed when the light is made. This is the practice of the original conventional light source because the conventional light source is 360° light. . If you want to direct light to the application, Philips' traditional lamps are the best, and the light loss is 40%. The optical parameters of the lamps used by many domestic LED downstream manufacturers are actually the optical parameters of the chip or the light source, not the optical index parameters of the overall luminaire.
Now the most advanced scientific method is to do the light distribution on the chip package, and to derive the light of the chip at one time to maintain the maximum light output, so that the light loss rate is only 5%-10%. As technology continues to improve, the light loss rate will be lower and lower, and the light efficiency of the light source will become higher and higher. The same light source luminaires do not need to be equipped with light distribution, and the relative luminaire efficiency will be greatly improved, making it more widely used in functional lighting, forming a considerable market channel. Therefore, a good LED supplier is our top priority. We don't have to spend a lot of money to study how our LEDs go to light distribution. It doesn't take a lot of time and experience to let engineers use software to simulate. The easiest way is to Let LED white light suppliers cooperate. Be aware that if our engineers use software to simulate, the necessary actions are input and output. Input is the data import in the previous period, and the output is the result of the simulation. Then the data in the previous period must be accurate and the simulation of the back end can be correct.
Thermal performance (structure): LED lighting efficiency and power supply for lighting is one of the keys to the LED industry. At the same time, the PN junction temperature of the LED and the heat dissipation of the housing are particularly important. The greater the difference between the PN junction temperature and the lamp body temperature, the greater the thermal resistance, and the conversion of the light energy into thermal energy is consumed in vain, and the LED is damaged in severe cases. A good structural engineer should not only consider the structure of the luminaire and the thermal resistance of the LED, but also consider whether the shape of the luminaire is reasonable, fashionable, novel, and of course reliability, maintainability and practicality, that is, to stand by the designer. From the perspective of the user, we must consider the product from the perspective of the user...
At present, upstream dragon companies, such as CREE, can achieve a chip light efficiency of 130-150 lm / W. However, the LED junction temperature directly affects the LED light extraction efficiency, device lifetime, reliability, and emission wavelength. Keeping the LED junction temperature within the allowable range is a key factor that must be studied in every aspect of high-power LED chip fabrication, device packaging and device applications, especially the core issues that must be addressed in LED device packaging and device application design.
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