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  • Author Author: Former Member
  • Date Created: 8 Jun 2012 9:52 AM Date Created
  • Views 526 views
  • Likes 1 like
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led 20w

Former Member
Former Member
8 Jun 2012

Want to do high power led  lighting products are the most critical part is I do not know, that is equipped with optical, structural, electronic, popular with light, structure, electronic jargon expression as follows: optical properties, thermal properties, electrical properties. At the same time, the light distribution is particularly important to understand the light distribution, it is not good LED lighting.

Optical performance (with light): LED optical performance is mainly related to the performance requirements of the spectrum, luminosity and chroma. According to new industry standards set by the semiconductor light-emitting diode test method ", the main luminescence peak wavelength, spectral radiation bandwidth, axial light-emitting angle intensity, luminous flux, radiant flux, luminous efficiency, chromaticity coordinates, color temperature, color purity and the main wavelength, the color rendering index. Display the LED 400W  mainly visual and intuitive effect, therefore the relevant color index does not make the requirements, but the lighting of the white light the LED, color temperature, color rendering index and illumination on the particularly important, an important indicator of lighting atmosphere and the effect of, rather color purity and dominant wavelength is generally not required.

Mainstream practice in the global LED industry, made lamps with light package LED chips to form a light source or light source module, so is the original practice of traditional light sources, because the traditional light source is 360 ° LED Blue 150W . If you want to light guide to the application side, the traditional lighting of the Philips do the best a 40% light loss. Many LED downstream manufacturers in the use of lighting optical parameters in fact are chip or optical parameters of the light source, rather than the overall lighting of the optical index parameter.

Now the most advanced scientific methods to do the light distribution on the chip package, a chip of the light guide, to maintain maximum light output, optical loss rate of only 5% -10%. As technology continues to improve, light loss rate will be getting lower and lower light source efficiency will become increasingly high. With the same light fixtures do not need to do with light, the relative efficiency of the lamps will greatly improve, to make wider use of functional lighting to form a market of sufficient size channels. Therefore, a good LED suppliers, is our top priority, we do not need to spend costly to study how our LED with light is better, do not need to spend a lot of time and experience allows engineers to use a software simulation, the easiest way is to LED white light suppliers to cope with. You know, our engineers, such as software to the simulation, then the necessary action is the input and output. Enter the pre-data import, the output of the simulation results, preliminary data must be accurate to correctly back-end simulation.

The thermal properties (structure): the lighting of the LED strip lights luminous efficiency and power is one of the keys of the LED industry, in the meantime, LED PN junction temperature and shell heat issues is particularly important. PN junction, the greater the temperature difference of temperature and light body, then the thermal resistance of the greater, followed by light can be converted into heat energy consumed in vain, and in severe damage to the LED. A good structural engineer must consider not only the structure of the lamp and LED thermal resistance, but also consider the shape of the lamp is reasonable, fashion, new, of course, reliability and maintainability, as well as practicality, that is, to stand designers perspective to think about, but also from the user point of view to consider the products.

On the valley of death enterprises, such as chips can be done by CREE light efficiency can reach 130-150lm / W. LED junction temperature directly affects the efficiency of the LED light, the device lifetime, reliability, and emission wavelength. Keep the LED junction temperature within the allowable range, every aspect of the preparation of high-power LED chips, device packages, and device applications must focus on key factors, especially the LED 200W   device packaging and device applications must be designed to focus on solving the core problems.

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