LED lamps composition:
Power input interface: play the role of connecting power, such as the lamp holder of a bulb lamp.
Shell: generally composed of aluminum profiles with good heat dissipation. The shape of the lamp, the LED heat dissipation function, and the heat dissipation design of the shell directly affect the efficiency and life of the lamp.
Lampshade: Not only is it put on the lamp to gather the light together, but it can also prevent electric shock and protect the eyes. So every lamp will have a lampshade. There are PC lampshades, glass lampshades, and plastic lampshades.
LED light source: It is composed of N LEDs and is the core component of this lamp. The lamps emit the first visible light through it
Drive power supply: Because the operating voltage of a single LED is low and the operating voltage range is very narrow, the LED can not work normally and is easily damaged. Therefore, the input power must be controlled by constant voltage and current through the circuit, and the advantages and disadvantages of the drive power Directly affect the life of the LED and the entire lamp.
Low-power LED (single LED power 0.03-0.2 watts):
1. In-line LED: According to the colloidal shape: 3mm, 4mm, 5mm, 8mm, 10mm, 12mm, square, oval, tombstone, and some special shapes, etc.; the driving current of the general low-power LED is 20mA,
2.Piranha LED: It is also a kind of in-line LED, because its heat dissipation is better, and its drive current is 50mA
3. SMD LED: 3020, 3528, 5050, the name of the SMD LED is named according to the size of length * width, for example: 3020 means that the length of the LED is 3mm and the width is 2mm; 3528 means that the length of the LED is 3.5mm , The width is 2.8mm. 3020, 3528 drive current is 20mA, 5050 drive current is generally 60mA
High power LED:
Broadly speaking, the power of a single LED light source is greater than 0.35W (including 0.35W). Basically, we focus on 1W, 2W, and 3W.
The integrated light source consists of N 1W LED chips connected in series and parallel and packaged in an LED bracket. Commonly used are 10W, 20W, 30W, 50W, 70W, 100W, 150W.
There are many LED chip manufacturers, and CREE is the one with the most stable quality on the market. Domestic packaging manufacturers use several brands produced in Taiwan.
2.SMD LED: 3020, 3528, 5050, the name of the SMD LED is named according to the size of length and width, for example: 3020 means that the length of the LED is 3mm and the width is 2mm; 3528 means that the length of the LED is 3.5mm , The width is 2.8mm. 3020, 3528 drive current is 20mA, 5050 drive current is generally 60mA.
The brand of the LED
Foreign
Cree, Osram, Lumileds, SDK, Semileds, Nichia, Toshiba, Toyoda Gosei. (High quality, mainly blue and white light, high price)
Taiwan
Zhuoyan, Guangjia, Zhoulei, Zhouji, Lianding, Juxin.(High, medium and low level, complete color and wavelength, moderate price.)
Question of the customer
1.What is a high-power LED lamp?
Answer: A lighting fixture that uses high-power LEDs as the light source.
2. What are the advantages of high-power LED lamps compared to traditional lamps?
Answer: 1. High luminous efficiency 2. High energy saving 3. Multiple light colors 4. High safety 5. Diversity of design shapes 6. Long life span 7. Quick response 8. Reasonable lamp structure 9. Environmental protection, better environmental protection benefits, 10. Low operating cost 11. The color temperature does not change much, less than 100K, and the color temperature consistency is good. 12. The lumen maintenance rate is high, the light decay is slow, and the light decay does not exceed 10% after 5000 hours of use.
3.How do high-power LED lamps dissipate heat?
Answer: The heat pipe is used to transfer the heat generated by the LED light source to the radiator, and then the area of the radiator is used for heat radiation and air cooling.
4.Why do LEDs save energy?
Answer: High-brightness monochromatic LEDs have made progress in the market. Although they are more expensive than traditional bulbs, their advantages can completely offset their higher prices, that is, they have a higher cost performance. First of all , A red LED needs to consume 15 watts of energy to reach a certain brightness, while a traditional light bulb needs to consume as much as 150 watts to achieve the same measurement; in addition, scientists have determined that when the LED is energized, 10% The electric energy can be converted into light energy, while the conversion efficiency of incandescent bulbs is only 7-8%. It can be seen that, in order to achieve the same lighting effect, it is obvious that LED lamps save energy than incandescent lamps.
5.Why does LED have a long life?
Answer: The light-emitting mechanism of incandescent lamps is that electric energy heats the light-emitting tungsten filaments to emit light. After a long time of heating, the tungsten filaments will age or even burn out. At this point, the life of the incandescent bulb will end. The light-emitting mechanism is determined by the special composition structure of the diode. The diode is mainly composed of a PN crystal plate, an electrode and an optical system. When a forward bias is applied to the electrode, electrons and holes are injected into the P and N regions respectively. When non-equilibrium minority carriers and majority carriers recombine, the excess energy will be converted into light energy in the form of radiated photons. The luminescence process includes three parts: carrier injection under forward bias, recombination radiation and light energy transmission. It can be seen that the diode mainly emits light by the continuous movement of carriers, and there is no phenomenon of aging and burnout. Its special light-emitting mechanism determines its light-emitting life as long as 50,000-100,000 hours.
