What is the high temperature resistance of LED lamp beads?
Yesterday, a customer asked me if the 3mm lamp bead is high temperature? The editor of Hailongxing will answer for you how much the high temperature resistance of the electrodeless lamp beads is. The following is how Hailongxing compiled and summarized the following information about the high temperature resistance of LEDs. I hope it will be useful to you.
3MM round head with hat brim lamp bead yellow colloid color: yellow diffusion product size: Φ3*H5.3MM product material: silver-plated iron, gold wire, environmental protection high temperature resistant glue product certification: ISO9001: 2015, SGS product application: indicator light Beads, electric lamp beads. LED lamp beads are generally relatively high temperature resistant, but they still have a certain temperature limit. The high temperature resistance performance of LED lamp beads depends on its design and manufacturing quality. Normally, the operating temperature range of LED lamp beads is between -30°C and 100°C.
Generally, the temperature of the LED lamp bead is less than 80 degrees. For the indirect test of the temperature of the LED chip, the temperature of the LED pin is considered to be less than 70 degrees. Even if the surface temperature is slightly higher, if the junction temperature of the LED chip can be guaranteed to be below a certain value, the luminous efficiency and lifespan will basically not be affected.
The temperature of the LED lamp is not high, the junction temperature (PN junction) of the LED lamp bead is generally below 150°, and many lamp bead chips require the junction temperature to be below 120°.
So how many degrees of high temperature can LED lamp beads withstand? What does heat resistance refer to? If you refer to the undead lamp, it is very good, 80, 90 degrees, higher, it will not burn out, if you refer to light decay, it is about 50, 60 degrees At this time, the light decay is not very large. If you want to maintain a certain brightness for a long time, it is best to keep it at 40-50 degrees, and the light decay will be very small. In short, the higher the temperature, the longer the life Short. It depends on what your heat resistance refers to. The immortal lamp has a large light decay and a small light decay
3mm ,n LED lamp
There are many welding methods for LED lamp beads on the chip, and the following is one of the commonly used methods for reference. First, use an electric soldering iron to heat some soldering tin on the positive and negative electrode pads of the lamp bead (the soldering tin must not be too much, otherwise, the positive and negative electrode pads will be connected once heated with a hot-air gun), then use a hot-air gun to heat the positive and negative electrode pads at the same time, after the tin melts, use tweezers to place the positive and negative electrodes of the lamp bead on the corresponding pad.
LED is the light emitting diode, which is a semiconductor solid light emitting device that converts electric energy into light energy. Its core is the PN junction. In addition to the forward conduction, reverse cut-off and breakdown characteristics of the general PN junction, it also has the light emitting characteristics under certain conditions. Its structure mainly includes the following parts: lead, bracket, encapsulation glue, bonding wire, LED chip, solid crystal glue and phosphor. The discoloration failure of LED lamp bead is closely related to its material, structure, packaging process and service conditions. The following will analyze the causes of its discoloration through specific cases.
LED lamp beads are also called light emitting diodes. It has a wide range of applications. Its luminous colors include red light, emerald green light, yellow green light, yellow light, purple light, blue light, white light and orange light. The above is monochromatic light. It can also be made into two or three colors.
The gold wire used to package LED lamp beads contains more than 99.99% gold. It is produced by drawing gold from this material. In addition to 99.99% gold, this gold also contains less than 1% other trace elements. One of the core components of LED lamp bead packaging is gold wire, which is the bridge connecting the luminous chip and the welding point, and plays a decisive role in the service life of LED lamp bead. So how to identify the purity of gold thread?