The parameters of 3mm LED mainly include the following aspects:
Emitting color: 3mm LED lamp beads can emit red, green, blue, yellow, white and other colors of light, and can emit more types of light by mixing the three primary colors of RGB in different proportions. 1
Brightness: Brightness is an indicator of the luminous effect of LED lamp beads. The appropriate brightness can be selected based on the application scenario and needs. Excessive brightness may increase power consumption and cost. 12
Working voltage: The normal working voltage of 3mm LED lamp beads is usually between 1.8V and 3.5V. This value will be affected by the color of the LED and the working current. 2
Current: The current is determined based on the brightness and working voltage of the LED lamp beads. Different brightness requires corresponding current support.
Luminous flux: Luminous flux represents the total amount of light emitted by the LED lamp bead within a certain period of time, and the unit is lumens (lm). The luminous flux of 3mm LED lamp beads can range from 1lm to 5lm, and the specific value depends on the color and current of the LED.
Viewing angle: The viewing angle refers to the range covered by the LED lamp light, expressed in angle. The viewing angle range of 3mm LED lamp beads is usually between 10 degrees and 50 degrees, but this can also vary depending on the color.
Wavelength: Wavelength is a parameter that describes the wavelength of LED light. Common wavelengths range from 400 nanometers to 700 nanometers, which is related to the color of the LED.
Lifespan: The lifespan of LED lamp beads is usually very long, reaching more than 10,000 hours, and has good long-term stability and reliability.
Power and packaging specifications: The power of 3mm LED lamp beads is generally between 0.3W and 0.5W. The specific power will also be affected by the packaging specifications. Common packaging specifications include patch packaging such as 3014, 3528, 35
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?