LED is the English light emitting diode (LED) acronym, and its basic structure is an electroluminescent semiconductor material, with silver or white glue curing glue to the bracket, and then welded with silver wire, then surrounded with epoxy resin seals, play a role in protecting the internal core wire, so the seismic performance of the LED.
all kinds type of led light frame
LED (Light Emitting Diode), light-emitting diode, is a convert electrical energy into visible light can solid-state semiconductor devices, which can be converted directly into electricity to light. LED's heart is at one end of a semiconductor wafer, the wafer is attached to a frame, one end is the anode, and the other end connected to the positive power supply, so that the whole chip is epoxy encapsulated. Semiconductor chip consists of two parts, part of the P-type semiconductor, the hole in it dominates, the other side is N-type semiconductor, here is mainly electronic. But when the two semiconductor connected to form a PN junction therebetween. When the current through the wire on the chip, the electronics will be pushed P area, electron hole recombination, then it will emit energy in the form of photons P zone, which is the principle of LED light. The wavelength of light that is the color of light is determined by the material forming the PN junction decision.
Led light cover
Originally used as instruments of LED indication light, then a variety of light-colored LED has been widely used in traffic lights and a large area of the display, resulting in a good economic and social benefits. 12 inch red traffic lights, for example, in the United States would have long-life, low-efficiency 140-watt incandescent light as a light source, which produces 2000 lumens of white light. The red filter, light loss of 90%, only 200 lumens of red light. In the new design of the lamp, Lumileds company adopted the 18 red LED light sources, including circuit losses, including a total power consumption of 14 watts to produce the same light effect. LED lights are also important areas of automotive light applications.
For general lighting purposes, people need a white light. 1998 LED white light of successful development. This is the GaN LED chip and yttrium aluminum garnet (YAG) package together made. GaN chip emits blue light (λp = 465nm, Wd = 30nm), yellow YAG phosphor with Ce3 + after high-temperature sintering of blue excitation light emitted by this peak 550nLED lights m. Blue LED chip mounted in the cavity reflective bowl, covered with a thin layer of resin mixed with YAG, and about 200-500nm. The blue part of the LED emitted by the phosphor substrate absorption, mixing blue and yellow phosphors emit another part, you can be too white. For InGaN / YAG white LED, the YAG phosphor by varying the chemical composition and thickness of the phosphor layer is adjusted, the color temperature can be obtained in the 3500-10000K colored white. This blue LED white light through a method, simple structure, low cost, high technology is mature, and therefore use the most.
Species
The first application of the principles of semiconductor PN junction made of light-emitting LED light source came in the late 1960s. The material is then used GaAsP, red light (λ p = 650nm), when the driving current of 20 mA, the luminous flux is only a few parts per thousand lumens corresponding luminous efficiency of about 0.1 lumen / watt. Mid-1970s, the introduction of elements of In and N, the LED produces green light (λ p = 555nm), yellow light (λ p = 590nm) and orange light (λ p = 610nm), luminous efficiency is also increased to 1 lumen / watt. By the early 1980s, there has been GaAlAs LED light source, so that the red LED light efficiency of 10 lumens / watt. Early 1990s, the successful development of red light, yellow light GaAlInP and hair green and blue GaInN two new materials to make LED light efficiency has been greatly improved. In 2000, the former made of LED in red, orange zone (λ p = 615nm) of the luminous efficiency of 100 lm / W, while the latter is made of LED in the green zone (λ p = 530nm) light efficiency can reach 50 lumens / watt.
Lamp housing
LED lights are highly efficient, environmentally friendly, long life characteristics. But the common people will find LED lights, LED brightness due to the particularly large, it is easy to make light energy into heat energy, making the LED lights hot. At this time, if not the heat as soon as possible, such as LED, its life will be greatly reduced.
Many LED manufacturers use aluminum housing for LED lamps. Aluminum housing is easy to heat, attractive appearance, light weight, a lot of high-end electronic products with aluminum housing. For example, Apple's Apple laptops "Mac Pro" series of products using high-end computer all-aluminum shell, easy-to-laptop cooling, so that the computer and even fans are not installed.
LED aluminum shell can increase the life of the wick, the LED lights look beautiful. But the cost of more expensive aluminum lamp cup, high production costs, lamp cup needs to be processed with a lathe. Therefore, a number of high-quality, medium-quality LED lantern aluminum lamp housing.
Another common LED lamp housing is a plastic shell. Due to the low cost of the plastic case, some of the low-end LED lamps will use plastic housing. But the plastic case is not easy to heat, when exposed to heat can easily melt the plastic, sublimation harmful gases. So, Europe, North America, Japan is not using plastic housing. As domestic demand for low-cost high-volume parts of LED lights, large plastic housing sales in the country.
Light parts
Special Purpose
White LED bulbs with high-performance, low-power markets (such as flashlights, solar garden lights and pedestrian lights, bicycle lights, etc.) there is leadership. Monochrome LED lights are commonly used to make traffic lights and festive lighting.
2010, LED lights has become a hot topic in horticulture and agriculture. U.S. National Aeronautics and Space Administration pioneered the use of LED lights planted in space, followed by household and commercial indoor gardening also follow. These special lamps specially designed planting, which happens to be the chlorophyll absorbs light wavelength, and promote the growth of the remainder, also reduced the plant does not absorb the light, resulting in waste. In the visible spectrum, photosynthesis just red and blue, so these lights design has two colors. Compared to similar products, these LED lights can provide the same luminosity, without ballast, and the heat is much less than the gas discharge lamp, very suitable for indoor planting. Less heat to reduce transpiration, thus reducing the number of irrigation. Because of this, the use of these grow lights, plant need not be too irrigation.
Our factory:
We are specialized in Aluminium die casting for all kinds of lighting frame. Please send the drawing or sample, we will quote the competitive price to you.
Welcome to visit our factory.
.jpg)
