|
The emergence of electricity brought about a leap in productivity, while incandescent appeared also pioneered the history of mankind who use the electricity to illuminate. Generally consider that Incandescent was invented by the Americans Thomas? Edison, in fact, a lot of other people made substantial contributions to invent the electric bulb before Edison also. In 1801, the British chemist David energized a platinum wire to emit light,he also invented the electric candle in 1810,he utilized an arc between two carbon rod to lighting. In 1854 Henry Goebbels placed a carbonized bamboo in a vacuum glass bottle to powered light. His invention is the first incandescent that have practical utility. The light bulb he was testing has been able to maintain 400 hours, but did not timely apply for design patents. In 1850, Englishman Joseph Wilson Swan (Joseph Wilson Swan) began to study lamp. In 1878, he energized UK patent by virtue of carbon filament bulbs light under vacuum and began to establish the company in the UK, installing lights in each family. In 1874, two Canadian electrical technician filed a patent lamp. They are filled with helium in the glass bulb and energized light with carbon rods. But they had no sufficient financial resources to continue the development of this invention, so in 1875 they sold to Edison. Edison purchased r patent and tried to improve the filament. In 1879 he changed carbon filament light bulb that made successfully maintained 13 hours. To 1880, Edison experimented with 1600 kinds of materials, and finally made into the world's first successful incandescent lamp with a filament made of carbon fiber, which successfully maintain 1,200 hours in the laboratory. From then on,mankind have entered the era of electric lighting. 1, Incandescent 1909 U.S. scientists Keli Qi invented the tungsten filament and improved the brightness and life of incandescent. Using a powered methods to heat filament in glass bulb shell, resulting in thermal radiation emitting filament light source,lamp is connected part of incandescent electrically and mechanically. According to the form and use,it can be divided into screw lamp, focus lamp and special lamp. Commonly used in residential basic lighting and decorative lighting, with advantages of easy installation, start immediately and low cost. It has wide operating voltage range, which is from a few volts battery voltage to the mains voltage, low prices, no additional circuitry. Its main application is the home lighting and wherever requires intensive low operating voltage,such as flashlights, console lighting. Only 10% of the input energy is converted into visible light energy, the typical life is from dozens hours to thousands of hours. 2, halogen In 1959 the incandescent halogen technology was invented and has reached a new level and improved the life of incandescent lamp. Compare with the same rated power halogen incandescent, halogen’s volume is much smaller, and enable fill with the high-pressure and heavier gas (more expensive), these changes can extend the life or increase light efficiency. Meanwhile, halogen can also be directly connected to the power without control circuits. The life of ordinary incandescent lamp is 1000 hours, which is half less than halogen, luminous efficiency is 30%. Halogen is widely used in vehicle lighting, projection systems, special spotlights, low-cost flood lighting, stage and studio lighting and other whose compaction, convenience and good performance over non-halogen incandescent lamp. 3, fluorescent 1940s fluorescent appeared, which uses the gas discharge principle to produce energy. Since the light emitted is mainly ultraviolet light, less infrared radiation, so the luminous efficiency is higher than incandescent, such lamps replace incandescent, energy saving is 75%, life is expectancy increased by 8 to 10 times. Now we are mainly used fluorescent lamp, high lumen single capped fluorescent lamps, energy saving lamps (CFL), it has been very widely used, the leading is commercial and industrial lighting. Commonly used in offices, shopping malls, the main house and other general public buildings, optional multi-color light can reach high illumination balance economic and other advantages. It also issued many beautiful colored light,which is decided by the chemicals contained in the phosphor, such as coated magnesium tungstate emit blue shade, painted cadmium borate emit pink shade. Through design innovation, the development of phosphors, and the application of electronic control circuits, fluorescent continuously improve performance. 4, low pressure sodium Vapor lamp emit light by mean of the various elements steam that sealed in a tube glass passing through the current. Vapor lamps are mercury vapor lamps, sodium vapor lamps. Luminous efficiency is the highest, but only radiate monochromatic yellow light, which is impossible to distinguish the case of lighting in various colors. Main applications are: road lighting, security lighting and similar occasions outdoor applications. Its luminous efficiency is 2 times more than fluorescent, 10 times than halogen. Compared with fluorescent lamps, discharge tube of low pressure sodium has a long tube-shaped, bent generally as "U" shape,put the discharge tube in an evacuated outer bulb inside the sandwich, which sandwich the outer bulb is coated with an infrared reflective layer to save energy and increase the maximum luminous efficiency purposes. We can see that the second light revolution go through a long evolution, eventually performance better and better to meet our daily needs. As the third revolution of the LED lights, the LED light application area is inferior to incandescent and fluorescent lamps, it is enough to bring the evolution of the third generation, LED lights are currently more widely applied, the most obvious is that LED flood light and LED tunnel lights is used outdoor and LED tube for indoor, As a professional LED manufacturing enterprise,Li Sida lighting www.lead-lighting.com has won the majority of the praise due to its professional products and excellent service. He is trying best to put LED more close to our lives, but also allow us to accept the cheaper price and better energy-saving LED product.
Related Articles -
Incandescent lamp, halogen lamp, fluorescent lamp, LED light, LED flood light,
|
