What are the classifications of led lamp beads? What are the types of led lamp beads?

Summary: The most common led lamp beads, do you know which LED lamp bead classification? What are the types of led lamp beads? This article mainly introduces the classification of led lamp beads and the problems that often occur in our LED lamp beads and led lamp beads that are common in daily life.

1, in-line small power specifications are: straw hat / steel helmet, round head, concave, oval, square (2 * 3 * 4) bullets, flat head, (3/5 / flat / bread type) piranhas.

2, SMD patch is generally divided into (3020/3528/5050 these are front light)/1016/1024, etc. These are side light sources.

3, high-power LED can not be classified into the patch series, their power and current use are different, and the photoelectric parameters vary greatly. If a single high-power LED light source is not equipped with a heat-dissipating base (generally a hexagonal aluminum seat), its appearance is not much different from that of a normal patch. The high-power LED light source is circular, and the package is basically the same as the SMD patch. However, there are essential differences between SMD patches in terms of use conditions/environments/effects.

The terminal voltage of the PN junction constitutes a certain barrier. When the forward bias voltage is applied, the barrier decreases, and the majority carriers in the P and N regions diffuse toward each other. Since the electron mobility is much larger than the vacancy rate, a large amount of electrons diffuse into the P region, which constitutes the injection of minority carriers in the P region. These electrons are combined with the vacancies on the valence band, and the energy obtained during the recombination is released in the form of light energy. This is the principle of PN junction illumination.

1: LED lamp beads are generally divided into: in-line type, patch type, high power, piranha.

2: Straight-inserted common straw hat light, round head, flat head, lamp body size is divided into: F3 F5 F8 F10

3: SMD lamps are common 0603

.1206.0805.020.3528.2835.5050.5630.5730.2030 and so on. Mostly used for lighting and lighting.

4: High power refers to more than 0.5W power, such as 1W 3W 5W 10W 20W.50W100W, etc., which are often used in lighting products.

5: The piranhas are divided into flat heads, etc., mostly used for lighting, car lights.

6: LED lamps are widely used, electronics, electrical appliances, communication, lighting, among which the common common for household use is the straw hat light, patch 3528.2835.5050.5630.5730. The high power is usually 1-3-5-10W.

1) Check if the power supply has normal operation, and the indicator light is not lit. If it is not lit, please check if the power supply is connected.

2) Check if the power cord of the lamp bead is connected with the positive and negative poles of the power supply. Is there any inversion? If any of the above questions exist, please connect them accurately.

The nominal 3V LED lamp beads, in fact, different colors have different requests for current, ** request current is the smallest, followed by red, green, white and blue. If the current is too large, the wick will burn. Using a 2.4V rechargeable battery, ** is easy to burn, because even if the voltage is not large, but the current is too large, it will still burn. In the case of using the button battery, since the button battery voltage is 3V, the discharge current of the button battery is small, so the 3V LED lamp bead will not be burned. Therefore, when using the LED lamp bead, you should choose the appropriate power supply, pay attention to the voltage, and the current. When the power supply is selected, if it does not meet the additional request of the LED lamp bead, the circuit needs to be improved, and the additional resistor is added.

In the case of no power supply, if you want to choose a 3V button battery in order to facilitate the purchase, you can use the battery to check the LED light.

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