LED panel lights main components, the key technology（II）

LED panel lights of the three key technologies

Light performance (with light): LED panel light optical properties mainly related to the photometric, spectral and chromaticity and other aspects of performance requirements. According to the latest industry standard "semiconductor light-emitting diode test method", there are emission peak wavelength, spectral radiation bandwidth, axial luminous intensity angle, luminous flux, radiation flux, luminous efficiency, chromaticity coordinates, correlated color temperature, color purity and main wavelength, Color rendering index and other parameters. LED panel lights commonly used white LED, color temperature, color rendering index and illumination is particularly important, it is an important indicator of lighting and the effect of color, and color purity and the main wavelength is generally not required.

LED industry, the mainstream approach is to form a light source LED chip or light source module, made in the light when the light distribution, so the use of the original traditional light source approach, because the traditional light source is 360 ° light. If you want to light to the application side, the current Philips traditional lighting to do the best one, light loss also reached 40%. And our domestic LED downstream manufacturers of the application of optical parameters are actually the optical parameters of the chip or light source, rather than the overall light of the optical parameters of the parameters.

How to better improve the performance of light, the world's latest technology is in the chip package to do with the light, once the chip light guide out to maintain the maximum light output, so that the optical loss rate of only 5% -10%. With the continuous improvement of technology, light loss rate will be lower and lower, the light effect will be higher and higher. The same with such a light source lamps do not need to do with the light, the relative efficiency of the lamp will be greatly improved, making it more widely used to functional lighting, the formation of a considerable scale of the market channels. So a good LED supplier is our top priority, we do not need to spend a high cost to study our LED how to light as well, do not need to spend a lot of time and experience to engineers to use software simulation, the easiest way is Let the LED white suppliers to match. To know that our engineers, such as using software to simulate, then the necessary action is the input and output. Input that is the early data import, the output is the simulation of the results, then the requirements of the previous data must be accurate back-end simulation can be correct.

Thermal performance (structure): lighting with LED luminous efficiency and power supply is one of the key LED industry, at the same time, LED PN junction temperature and shell cooling problem is particularly important. PN junction temperature and lamp body temperature difference is greater, then the greater the thermal resistance, followed by light can be converted into heat consumed in vain, serious LED damage. A good structural engineer, not only to consider the structure of the lamp and LED thermal resistance, but also consider the shape of the lamp is reasonable, stylish, innovative, of course, reliability and maintainability and practicality, both standing on the designer The angle to think, but also stand in the user's point of view to consider the product.

Today's common technology is the use of aluminum substrate to package, aluminum substrate package chip cooling and optical conversion efficiency there are technical core bottlenecks, can not effectively control the junction temperature and stable to maintain high power light output, and the application will be higher because the chip light efficiency , The required aluminum plate area is greater, will increase the cost and application volume, extremely inconvenient. So how to get out of this new path is a new technology core features. Under the premise of maintaining low cost and passive cooling mode, the use of high thermal conductivity medium, through the new device / lamp overall structure, reduce the thermal resistance, reduce the PN junction temperature, the PN junction work in the allowable operating temperature, to maintain the maximum amount of photons Output, the minimum requirements are as follows:

(1) ultra-low thermal resistance materials, rapid cooling of the overall structure of technology;

(2) high thermal conductivity, anti-UV packaging technology;

(3) the application of low environmental stress structure technology;

(4) the overall thermal resistance <20K / W, junction temperature <80 degrees;

(5) LED light source lighting module operating temperature control in 65 ℃ below.