The optical performance of LED panel light mainly involves the performance requirements of luminosity, spectrum and chroma. According to the latest industry standard “semiconductor light-emitting diode test method”, the main parameters are peak wavelength, spectral radiation bandwidth, axial luminous intensity angle, luminous flux, radiation flux, luminous efficiency, chromaticity coordinates, relevant color temperature, color purity and dominant wavelength, color rendering index, etc. White LED, which is commonly used in PANEL LED light, is particularly important in color temperature, color rendering index and illumination. It is an important indicator of lighting atmosphere and effect, but the color purity and main wavelength are generally not required.
The mainstream practice in the LED industry is to package the LED chip to form the light source or light source module, and then distribute the light when it is made into lamps. In this way, the traditional light source is used, because the traditional light source is 360 ° light. If you want to guide the light to the application end, Philips’s traditional lamps are the best, and the light loss can reach 40%. In fact, the optical parameters of many domestic LED downstream manufacturers are the optical parameters of chip or light source, not the optical parameters of the whole lamp.
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How to better improve the performance of light, the latest technology in the world is to do light distribution on the chip package, to guide the light out of the chip at one time, to maintain the maximum light output, so that the light loss rate is only 5% – 10%. With the continuous improvement of technology, the light loss rate will be lower and lower, and the light efficiency of light source will be higher and higher. Also equipped with such light source, lamps and lanterns do not need to do light distribution, the relative efficiency of lamps and lanterns will be greatly improved, making them more widely used in functional lighting, forming a considerable market channel. Therefore, a good led supplier is our top priority. We don’t need to spend a lot of time and experience to study how to match the light of our LED. The simplest way is to let the LED white light supplier cooperate. You know, if our engineers use software to simulate, then the necessary actions are input and output. The input is the early data import, and the output is the simulation result, so the early data must be accurate, and the back-end simulation can be correct.
Thermal performance (structure): Lighting LED luminous efficiency and power supply is one of the key to the LED industry. At the same time, the PN junction temperature and shell heat dissipation of LED are particularly important. The greater the difference between PN junction temperature and lamp body temperature is, the greater the thermal resistance is, and then the light energy is converted into heat energy, which is consumed in vain. In serious cases, LED is damaged. A good structural engineer should not only consider the structure of the lamp and the thermal resistance of the LED, but also consider whether the shape of the lamp is reasonable, fashionable and novel. Of course, there are also reliability, maintainability and practicability. He should not only think from the perspective of the designer, but also consider the product from the perspective of the user.
Today’s common technology is to use aluminum substrate to package. The chip heat dissipation and optical conversion efficiency of aluminum substrate package have technical core bottlenecks, which can not effectively control the junction temperature and stably maintain high-power optical output. Moreover, the higher the light efficiency of the chip, the larger the area of aluminum substrate required, which will increase the cost and application volume, which is extremely inconvenient. So how to get out of this misunderstanding and open up a new way is the core feature of new technology. On the premise of keeping low cost and passive heat dissipation, the thermal resistance and junction temperature of PN junction can be reduced by using high thermal conductivity medium and new device / lamp structure, so that the PN junction can work at the allowable working temperature and maintain the maximum photon output.
