How to detect the quality of 2835 SMD lamp beads
2835 lamp beads have seven colors of red, yellow, white, green, orange, purple, yellow-green, red and blue lights, widely used in visual light source applications, electronic gifts, digital, communications, automotive electronics, lighting, indoor lighting, plants Grow lights, electronic toys, traffic instructions, urban lighting projects
1. The quality of the lamp bead: the quality of the lamp bead determines the quality of the chip. If you choose a small manufacturer to produce low-quality lamp beads, the brightness of the light strips produced is relatively low, because the quality of the LED light-emitting chips determines that the brightness of the LED lamp beads is not high, and those chips are 1-2 cents A single inferior product will leak electricity (dead light) after being used for a period of time. Products made of high-quality chips are characterized by high brightness and stable performance. Cheng Guangxing Optoelectronics uses imported chips, such as Taiwan Epistar. Fundamentally ensure the quality of LED SMD lamp beads.
2. Heat dissipation: If the heat dissipation conditions are not good, the lamp bead will work for a long time at high temperature, the light decay will be large, and its service life will also be reduced.
3. Color temperature: The color temperature classification should be as small as possible, so that when a large number of LEDs are lit together, it will not cause some yellowish and some color casts due to the large color temperature difference.
Hailongxing Optoelectronics has been specializing in the production of LED lamp beads for 17 years. The main products are: in-line LED, SMD LED, high-power LED, COB light source
2835 SMD LED,2835 lamp beads
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?