1.1 The origin of the light bulb
Light bulbs, invented by Edison, usually called incandescent lamps, glass, are almost universally known, and have a history of more than one hundred years. The principle is that the light is heated by electric energy, and the tungsten wire is heated to incandescent (2000 degrees or more) to generate light!
The periphery of the bulb is made of glass. The filament is kept under vacuum or under a low pressure inert gas to prevent the filament from oxidizing at high temperatures. Modern incandescent lamps generally have a life of about 1,000 hours. Although technical measures have been taken to hinder the sublimation of tungsten at high temperatures, in fact, tungsten can also sublimate at high temperatures, from solid to gas. The hot tungsten vapor is cooled and then solidified into a solid crystal attached to the inner surface of the lamp. So the light bulb will turn black and dark.
1.2 LED bulb
Incandescent bulbs, cheap and easy to use, have proven to be a huge success. Although it used to be the most popular lighting source in the house, it ultimately gave way to more advanced technology because it was not energy efficient. Incandescent lighting energy consumption, only 10% converted into light, while the rest into heat, waste, and energy consumption is too high, and life expectancy far, global resources in a tense environment, is gradually being prohibited governments.
Fluorescent lamps, which are often referred to as energy-saving lamps, have improved energy-saving effects compared to incandescent lamps. However, they are not ideal water sources because of the heavy metal elements that pollute the environment and the general trend of environmental protection.
With the rapid development of LED technology, LED lighting has gradually become the best choice for new green lighting. LED is far superior to traditional lighting products in terms of lighting principle, energy saving and environmental protection, and naturally produces LED bulbs!
LED bulbs, according to the classification of incandescent bulbs, mainly include bulbs, sharp bulbs and tail-blown bulbs.
The appearance of the LED bulb is based on the shape of the bulb that people are used to - spherical, and the internal light source is LED! The outer casing, no longer use glass, but choose to use the PC cover, sturdy! At the same time, the light transmission is also very good! Connected to the mains, perfect replacement for traditional incandescent bulbs.
1.3.2 Tip bubble and tail bubble
The filament of the bulb is made of tungsten. After being energized, the temperature is up to 2500 Â°C. Tungsten sublimes at high temperatures, and tungsten particles run out of the surface of the filament and deposit on the inner wall of the bulb. Over time, the bulb will turn black, the brightness will decrease, and it will also affect the appearance. Scientists made the bulbs pear-shaped according to the bottom-up motion characteristics of gas convection. In this way, the black particles evaporated by tungsten are rolled up and deposited on the neck of the bulb, which can reduce the influence on the periphery and bottom of the bulb, keep the glass transparent, and the brightness of the bulb is not greatly affected.
LED tip bubble structure diagram
LED pull tail bubble structure diagram
A bulb consists of six components, a lampshade, interface, LED light source, circuit board, power supply, lamp body (heat sink)
1, lamp beads: LED,
2, the lampshade: made of high transmittance PC material, the light transmittance is up to 95%, the illumination uniformity is good, and it is not irritating to the eyes.
3, heat sink: that is, the lamp body, the lamp shell is processed by aero-engine precision car aluminum car, and the heat dissipation and thermal conductivity are superior. The hollow heat conduction design is used to increase the contact area between the heat conducting surface and the air, and the heat dissipation effect is good.
4, the drive circuit: the use of the primary and secondary complete isolation room design, with overvoltage protection, overcurrent protection and short circuit protection and other functions, safe and reliable.
5, lamp head interface: for global range of voltage, can be flexibly replaced with E27, E26, E14, B22 and other specifications of the lamp head, easy to install.
6, the circuit board
1.5 LED advantage
1, energy-saving, white LED energy consumption is only 1/10 of incandescent lamps, 1/4 of energy-saving lamps; LED bulbs have achieved a very high level of energy-saving effect, in the case of the same light efficiency, energy consumption has Dropped to 1/8 of incandescent lamps and 1/2 of electronic energy-saving lamps. Significant energy savings. Ultra-bright high-power LED light source, combined with high-efficiency power supply, saves more than 80% of electricity compared with traditional incandescent lamps, and the brightness is 10 times that of incandescent lamps under the same power;
2, longevity, life expectancy of more than 100,000 hours, for ordinary home lighting can be described as "once and for all." The ultra-long life is more than 50,000 hours, which is more than 50 times that of traditional tungsten lamps. LED adopts high-reliability and advanced packaging technology-eutectic soldering to fully guarantee the long life of LED; if the energy-saving lamp starts or turns off the filament frequently, it will black and break quickly.
3, solid state packaging, is a type of cold light source. It is therefore easy to transport and install and can be installed in any miniature and enclosed equipment, not afraid of vibration.
4, no strobe. Pure DC operation eliminates visual fatigue caused by stroboscopic light from traditional sources;
5, green and environmental protection. Contains no pollution elements such as lead and mercury, and does not pollute the environment;
6, impact resistance, strong anti-light, no ultraviolet (UV) and infrared (IR) radiation. No filament and glass casing, no traditional lamp tube fragmentation problem, no harm to the human body, no radiation.
7, work under low thermal voltage, safe and reliable; luminous efficiency can be as high as 90 Lm / w, a variety of color temperature optional, color rendering index is generally 0.76-0.85
LED bulbs, including bulbs, candle bulbs, etc., are widely used in shopping malls, office buildings, hotels, exhibition halls, conference rooms, hospitals, shop windows, homes, etc., especially for luxury high standards. Large space lighting decoration.
Light bulbs have a very wide market capacity, and the future development will also develop in the direction of intelligence, etc. These developments are actually to meet people's needs!
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