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Long life, high power and low power consumption technology of white LED

Long life, high power and low power consumption technology of white LED

  • 2020-07-20
  • Views:0

Long life, high power and low power consumption technology of white LED

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  • Categories:NEWS
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  • 2020-07-20
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Increase power but can cause encapsulation thermal impedance sharp drop below 10 k/W, so foreign firms have developed high temperature resistant white LED try to improve these problems, however, in fact, high-power LED the calorific value is higher than the small power LED to dozens of times, and the temperature rise will cause the sharp drop in luminous efficiency, even if the packaging technology allows high quantity of heat but the junction temperature of LED chip is likely to exceed allowable values, are finally realized that the heat dissipation problem is the fundamental way to solve the encapsulation.
On the service life of the LED, for example, use the siliceous material sealing materials and ceramic packaging materials, can increase the service life of the LED 10%, especially the white LED the luminous wavelength spectrum contains less than 450 nm wavelength light, traditional epoxy resin sealing material is easily damaged by short wavelength light, high power white LED for large quantity of light more accelerate the deterioration of sealing material, according to industry is less than ten thousand hours, the test results show that the continuous light high power white LED brightness has more than halved, cannot satisfy the basic requirement of lighting light source, long life.
About the LED luminous efficiency, improving the structure of the chip and the encapsulation structure, can achieve the same level as low power white LED, the main reason is that current density increased by more than 2 times, not only from large chips to take out the light, the results will lead to the low luminous efficiency than power white LED, if improve chip electrode structure, theoretically take light can solve the above problems.

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