How to Solve the Color Difference of White Through-hole LED?

There is a big difference between the white Throught-hole LED and the white SMD LED in the assembly operation. Regarding their performance differences, such as brightness, heat generation, life and other functional aspects. There are the solution to the white through-hole LED, such as 5mm White LED, 8mm White Through-hole LED, 10mm White Through-Hole LED as follow.

5mm White LED 2900K

First all of, in order to solve the color different of the white led. We need to analyze the reasons for the color temperature: during the curing process of the packaging glue, due to uneven heating, a part of the glue will be cured first, which will easily cause the phosphor mixed in the glue to sink and disperse unevenly, resulting in the law of light refraction The inconsistency causes dispersion, which is called color temperature different.

5mm whtie LED 3000K

Secondly, the method to solve the color temperature drift: 1. Adopt three-stage baking, the first stage is 60℃/1h, the second stage is 110℃/0.5h, and the third stage is 150℃/3.0h. The temperature is low, the glue back reaction is very gentle, it will thicken the whole and cure at the same time, there will be no curing speed problem, so that the phosphor is evenly distributed in the glue; 2. If it is two-stage curing, such as 100℃/1h+150℃ /3h, anti-settling powder can be added to A glue to prevent uneven powder settling during the glue curing process, thereby avoiding the phenomenon of color temperature drift.

5mm warm whtie LED

And then, we must know that the normal color temperature range is generally ±10% of the set color temperature. For example, the color temperature range of 3000K is 2700~3300K, and the color temperature range of 6000K is 5400~6600K. If the above range is exceeded, the color temperature is considered unqualified.

5mm white LED 3500K