Scientifically speaking, LED light source is a light source with light-emitting diodes as illuminants, which is essentially different from traditional incandescent lamps. Light-emitting diodes were invented in the 1960s. This light bulb has a long service life, which can be used continuously for 65,438+10,000 hours, which is 100 times longer than ordinary incandescent light bulbs. This is also its most remarkable and prominent feature. LED lamps are widely used, and have gradually replaced other light bulbs, because there are many types of LED lamps, such as indicator lamps, LED backlights, LED display screens, hand-held product backlights, flash lamps, automotive applications, general lighting, landscape lighting, special lighting and so on. Let Bian Xiao introduce in detail the types of LED light sources, the main advantages of LED light sources and the main factors that affect the price of LED lamps.
Types of led light sources
LED light sources are divided into three categories: two-color phosphor conversion, three-color phosphor conversion and multi-chip white LED light sources.
Characteristics of LED light source
1, solid-state cold light source, epoxy resin package, anti-vibration, no loose parts, no flammability, thermal deposition, light decay and other shortcomings. The service life can reach 60,000 ~ 65,438+10,000 hours, which is more than 10 times of the service life of traditional light sources. LED has stable performance and can work normally in the environment of -30~+50oC.
2. According to the principle of three primary colors of red, green and blue, under the control of computer technology, the three colors have 256 gray levels, which can be randomly mixed to produce 256×256×256 colors (i.e. 167772 16), forming a combination of different light colors. The light color of LED combination is changeable, which can realize colorful dynamic change effect and various images.
3, the use of cold light source, small glare, no radiation, no harmful substances in use. LED has low working voltage, DC drive, ultra-low power consumption (single tube 0.03~0.06W), and electro-optical power conversion is close to 100%, which saves more than 80% energy compared with traditional light sources under the same lighting effect. LED has better environmental benefits, no ultraviolet and infrared rays in the spectrum, recyclable waste, no pollution, no mercury, safe to touch, and it is a typical green lighting source.
4. Compared with the traditional light source, LED light source is a low-voltage microelectronic product, which successfully integrates computer technology, network communication technology, image processing technology and embedded control technology. The chip size used in traditional LED lamps is 0.25mmX0.25nm, while the size of lighting LED is generally above1.0mmx1.0mm. The desktop structure, inverted pyramid structure and flip chip design of LED die can improve its luminous efficiency, thus emitting more light. The innovations of LED packaging design include high conductivity metal block substrate, flip chip design and bare die-casting lead frame. These methods can be used to design devices with high power and low thermal resistance, and the illumination of these devices is higher than that of traditional LED products.
5. The energy consumption of white LED is only110 of incandescent lamp and14 of energy-saving lamp, and its service life can reach more than 65,438+10,000 hours. For ordinary household lighting, it can be described as "once and for all" and can work at high speed. If the filament of energy-saving lamp is turned on or off frequently, it will turn black and break quickly, which is safer. Solid-state packaging belongs to the type of cold light source. Therefore, it is very convenient to transport and install, and can be installed in any miniature and closed equipment, without fear of vibration and basically without considering heat dissipation.
Compared with ordinary fluorescent lamps, LED lamps have many outstanding characteristics, but correspondingly, their prices are higher than ordinary fluorescent lamps. There are many kinds of LED lights, and the prices of different kinds of LED lights are not the same.
What are the main factors that dominate the cost performance of LED lamps?
1, different chip sizes, different prices. Chip size is directly proportional to the price.
2. The colloid of ordinary LED lamps is epoxy resin, but LED lamps with ultraviolet protection and fire retardant are more expensive.
3, LED brightness is different, the price is also different.
4. LED with small leakage current has long service life and high price.
5. Different lighting angles lead to different prices.
Ok, that's the information about what led light source means compiled by Bian Xiao. I hope it won't help you much.