LED beads stand for light-emitting diodes.
Its luminous principle is that the PN junction terminal voltage forms a certain potential barrier, when the forward bias voltage is added, the potential barrier drops, and most carriers in P and N zones diffuse to each other. Since the electron mobility is much larger than the hole mobility, a large number of electrons will diffuse into the P-region, constituting the injection of minority carriers in the P-region. These electrons combine with holes in the valence band, and the resulting energy is released as light energy.
Its characteristics are as follows:
1. Voltage: LED lamp beads use low voltage power supply, power supply voltage between 2-4V.According to different products, it is driven by a safer power supply than high voltage power supply, especially suitable for public places.
2. Current: the operating current is 0-15mA, and the brightness becomes brighter with the increase of current .
3. Efficiency: 80% less energy consumption than incandescent lamps with the same light efficiency.
4. Applicability: Each unit LED chip is 3-5mm square, so it can be prepared into various shapes of devices, and suitable for changeable environment.
5. Response time: The response time of its incandescent lamp is millisecond level, and that of LED lamp is nanosecond level.
6. Environmental pollution: No harmful metal mercury.
7. Color: Color can be change by the current, led through chemical modification method, adjust the band structure and band gap of the material, to achieve red, yellow, green, blue, orange multi-color light. For example, when the low current is red LED, with the increase of current, can turn orange, yellow, and finally green.
Its parameters are described as follows:
1.Brightness
The price of LED beads is related to brightness.
The typical brightness of the beads is 60-70 lm. The general brightness of the bulb lamp is 80-90 lm.
The brightness of 1W red light is generally 30-40 lm. The brightness of 1W green light is generally 60-80 lm. The brightness of 1W yellow light is generally 30-50 lm. The brightness of 1W blue light is generally 20-30 lm.
Note :1W brightness is 60-110LM. 3W brightness up to 240LM. 5W-300W is integrated chip, with series/parallel package, mainly depends on how much current, voltage.
LED lens: PMMA, PC, optical glass, silica gel (soft silica gel, hard silica gel) and other materials are generally used for primary lens. The larger the angle, the higher the light efficiency. With a small Angle LED lens, the light should be far away.
2. Wavelength
Same wavelength and color make high price.
White light is divided into warm color (color temperature 2700-4000K), positive white (color temperature 5500-6000K) and cold white (color temperature above 7000K).
Red light: band 600-680, of which 620,630 is mainly used for stage lights and 690 is close to infrared.
Blu-ray: Band 430-480, of which 460,465 are mainly used for stage lights.
Green light: Band 500-580, of which 525,530 are mainly used for stage lights.
3. Luminous Angle
Leds for different purposes emit light at different angles. Special luminous Angle is more expensive.
4. Antistatic ability
Antistatic ability of LED lamp bead has long life, so the price is high. Usually more than 700V antistatic LED lamp beads can be used for LED lighting.
5. Leakage current
LED lamp beads are one-way conductive luminous body. If there is a reverse current, it is called leakage, leakage current LED lamp beads has short life and low price.
Eurborn produces Outdoor Lights in China. We always choose the corresponding brand according to the lamps and try our best to make the products perfect.
Post time: Apr-27-2022
