How To Improve The Service Life Of White LED
Aug 02, 2021
Methods to improve the luminous efficiency of white LED is improving the structure of the chip and the encapsulation structure, to achieve the same level with 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, can improve the electrode structure of the chip, In theory, this problem can be solved.
The specific method to realize the uniformity of luminescence properties is to improve the packaging method of white LEDS. It is generally believed that the above problems can be overcome by improving the uniformity of the fluorescent material concentration of white LEDS and the manufacturing technology of the fluorescent material.
The specific contents of reducing thermal impedance and improving heat dissipation are:
1.Reduce the thermal impedance of the chip to the package.
2. to suppress the thermal impedance of the package to the printed circuit board.
3.Improve the smooth heat dissipation of the chip.
In order to solve the problem of longevity of white LED, the current LED manufacturers take the countermeasures to change the sealing material and disperse the fluorescent material in the sealing material, which can more effectively inhibit the deterioration of the material and the speed of light penetration reduction.
