LED (Light EmitTIng Diode) is a semiconductor light-emitting device that allows almost all of a small current to be converted into visible light.
The LED light efficiency is 50-200 lumens/watt, the spectrum is narrow, the monochromaticity is good, almost all the emitted light can be utilized, and the color light is directly emitted without filtering.
High energy savingIt has the characteristics of low voltage, small current and high brightness. A 10 to 12 watt LED light source emits light equivalent to a 35 to 150 watt incandescent lamp. The same lighting effect LED is 80% to 90% more energy efficient than traditional light sources.
Light colorYou can choose white or colored light, red, yellow, blue, green, yellow-green, orange-red, etc., and you can create multi-color combination and cyclic color change.
High securityThe LED light source is driven by low voltage, stable illumination, no pollution, no 50HZ, no stroboscopic, no ultraviolet B-band, the color of the color/body is close to 100, the color temperature is 5000K, and the closest is the color temperature of 5500K.
Design shape diversityThe domestic LED light source is composed of a plurality of single LED light-emitting tubes. The LED light source produced by Chaoyu Company is a chip light source, so it can be made into more shapes than other light sources, and it is easier to design the shape and size of the light source according to the user's situation. .
long lifeLED uses solid-state semiconductor chip to convert electrical energy into light energy, plus epoxy resin package, can withstand high-intensity mechanical shock, LED single-tube life is 100,000 hours, light source life is over 20,000 hours, and life is 12 hours per day. Above year, maintenance costs are low.
Quick responseThe LED lighting tube has a short response time and can ensure the switching of work between multiple light sources or different areas of a light source as required. When a dedicated power source is used to power the LED light source, the maximum illumination time is less than 10ms.
Reasonable structure of the lampLED lamps will completely change the structure of the lamps. According to different professional requirements, the structure of the LED lamps will increase the brightness after the initial brightness, and the brightness will be improved after the improvement of the optical lens.
Low operating costsOther light sources not only consume 2 to 10 times more power than LED light sources, but also replace them almost every month, wasting a lot of valuable time for maintenance engineers. Moreover, the more light sources are put into use, the greater the cost of device replacement and labor, and the initial investment savings will soon be offset by daily maintenance and repair costs. Therefore, it is economical to use a long-life LED light source in the long run.
Compared with traditional lighting source energy-saving lamps, metal halide lamps, tungsten lamps, magnesium lamps, fluorescent lamps, neon lamps, cold cathodes, LED light sources, what are the advantages? The following table compares the performance of LED light sources and common light sources under normal conditions:
Name power consumption (W) Operating voltage (v) Coordinated control of heat generation reliability service life (h)
Metal halide lamp 100 220 is not easy to high and low 3000
Neon 500 high and high indoor 3000
Magnesium xenon lamp 16W/m 220 better high better 6000
Fluorescent lamp 4-100 220 is not easy to be higher and lower 5000-8000
Cold cathode 15W/m needs better inverter, lower and better 10000
Tungsten wire lamp 15-200 220 is not suitable for high and low 3000
Energy-saving lamps 3-150 220 should not be dimmed low 5000
LED lamp extremely low DC 12-36V (220V available) Various forms extremely low and high 100,000
Incandescent lamp 4048012<20001.5 yuan 0.0031
Ordinary fluorescent lamp 36200055>50003.5-4.0 yuan 0.0016-0.002
Three primary color fluorescent lamp 2826809610000 with ballast 40-60 yuan 0.0149-0.0224
H-type fluorescent lamp 9500-54055-60<8000 with ballast 10-12 yuan 0.020-0.022
Spiral energy-saving lamp 26154060<8000 with ballast 25 yuan 0.0162
Φ5 white LED0.0651.3-1.820-28>100002.5-5.5 yuan 1.9230-3.0556
White LED1118>1000065 yuan 3.6111
Japanese incandescent lamp 6072012<20000.50 USD $0.0007/lm
Market*Fluorescent Lamp 36355097>1000010 USD$0.0029/lm
LED application products, especially semiconductor lighting products, are increasingly demanding for high-power LEDs, and the quality requirements for LEDs are also increasing. The main performances are as follows:
The range of forward voltage needs to be within the permissible range of circuit design. Many customers design to drive the LED to illuminate in a voltage mode. The magnitude of the forward voltage directly affects the change of the overall parameters of the circuit, which will bring hidden dangers to product quality. . In addition, for some products that require power consumption of the circuit, it is desirable to ensure that the forward voltage is as low as possible under the same luminous efficiency.
2. Luminous flux binning:The luminous flux value is an indicator that LED users are very concerned about. LED application customers must know the range of LED luminous flux they use to ensure the uniformity and consistency of their brightness.
3. Reverse leakage current test:The reverse leakage current is lower than the required value when loading a certain voltage. In the production process, the LED reverse leakage current is too high due to static electricity, chip quality and other factors, which will cause great hidden dangers for LED application products. It is easy to cause LED dead lights after using for a period of time.
4. Main wavelength binning:For monochromatic LEDs, the dominant wavelength is an important indicator for measuring its color parameters. The dominant wavelength directly reflects the human eye's visual perception of the LED light.
The color rendering index is directly related to the degree of discoloration of light on the object, which is very important for LED lighting products.
6. Relative color temperature binning:For white LED color temperature is a parameter used in the color industry to characterize it, this parameter can directly show whether the LED color is warmer or colder or more white.
7. The chromaticity coordinates x, y are:For white light or monochromatic light, the chromaticity parameter can be used to express the color region of the LED. Generally, four dots x, y are required to determine a chromaticity region. A certain test must be used to ensure that the LED is within the required four-point x, y chromaticity area.
In view of the above points, we can use two schemes for effective splitting and color separation. One is to perform quality control and binning from the measurement voltage to the leakage current to the luminous flux to the spectral multi-channel process. One is to automatically split the file through a professional high-power LED splitting and separating machine, which has high efficiency and high speed, and can separate the color separation of each LED.
The Schottky Diode is another type of semiconductor diode which can be used in a variety of wave shaping, switching and rectification applications the same as any other junction diode. The main adavantage is that the forward voltage drop of a Schottky Diode is substantially less than the 0.7 volts of the conventional silicon pn-junction diode.
Schottky diodes have many useful applications from rectification, signal conditioning and switching, through to TTL and CMOS logic gates due mainly to their low power and fast switching speeds.
the Schottky Diode also known as a Schottky Barrier Diode is a solid-state semiconductor diode in which a metal electrode and an n-type semiconductor form the diodes ms-junction giving it two major advantages over traditional pn-junction diodes, a faster switching speed, and a low forward bias voltage.
The metal–to-semiconductor or ms-junction provides a much lower knee voltage of typically 0.3 to 0.4 volts compared against a value of 0.6 to 0.9 volts seen in a standard silicon base pn-junction diode for the same value of forward current.
Variations in the metal and semiconductor materials used for their construction means that silicon carbide (SiC) Schottky diodes are able to turn [ON" with with a forward voltage drop as little as 0.2 volts with the Schottky diode replacing the less used germanium diode in many applications requiring a low knee voltage.
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