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LED is getting more and more popularity today owing to its outstanding features like low energy consumption, high efficiency, long lifespan, environmental friendliness and durability. It’s no exaggeration that LED has become an indispensable in the backlighting areas. It even started to challenge the mainstream CCFL as in large-scaled LCD panels. The core part of the LED is the driver circuit. No matter in lighting, backlighting or display, choosing the suitable driver circuit for the technical architecture must correspond to specific applications. The working principle of LED lighting is like this: the carrier in the semiconductor can release energy and give off photons giving that the forward voltage is applied to both ends. The drive circuit is mainly used to transfer AC voltage into constant power supply and regulate the voltage and current according to the need of LED devices. Besides safety, there are two other basic characters for the LED drive circuit. First is keeping a constant current as long as possible, that help to make the output current variation maintained between the range of ?10% and the power supply change goes beyond ?15% range. There are two reason for keeping constant current driver when using LED as the monitor, illumination devices or backlighting. First of all is to protect the drive circuit from affecting its reliability and exceeding the maximum rate. Next is to make sure the brightness homogeneity and meet the expected brilliance requirements of each LED. Second is having a high efficiency for the drive circuit with low power consumption. Pulse Width Modification, a traditional light adjusting technology, uses simple digital pulses to control LED driver all the time. In order to adjust LED brilliance, the output needs to be changed and the system needs to provide both wide and narrow digital pulses. This technology has advantage in being able to supply high quality white light with high efficiency through easy application. However, there is a fatal disadvantage in that it is sensible to electromagnetic interference and sometimes produces audible noises. For the LED driver circuit, voltage boost is an important process that achieve boosting by dividing into two different topological modes. Whether in lighting or backlighting applications, the designer has to consider the problem of improving the driver transfer efficiency. Raising the efficiency not only brings convenience for portable products to extend standby time but also solves the thermal dissipation problem for LED. LED needs components with stabilized voltage and current at work, so the main current limiting circuit should use highly efficient circuits with power supply possible to ensure the high efficiency of the LED system. LED has unique advantages in the use of green energy and light adjusting. The related integrated circuit is LA1810.

LED (Light Emitting Diode) is the famous source of light now a day. It has made human life much easier and much lighters. LED are being used at many places for different purposes. LED are semiconductors and use as light source. LED are majorly used not only at home but also at commercial places. LED have replaced many old techniques of light sources like bulb, tube lights. All these things operate at very high voltage and consume too much electric current and cannot operate too much long time and the main disadvantage of these legacy sources of lights that these sources of light got heat up very soon and creates much problem for the people. Having all these problems with the legacy light sources many problem LED have overcome on all these difficulties. LED does not operate on high voltage current and can work long lasting and did not get heat so early and give result as compared to legacy light source systems. LED bulb are being used in many places and can operate without having any problem. LED Lights Bulb used in car. In many Cars head light LED are widely used and these LED bulbs are used widely outside and inside interior of cars. At outside these LED bulb are being used as Head lights, indicators of both side, back light and as inside it is being used in Dash board to view inside the car and the main panel of the car where it shows the car speed and other state of fuel consumption. LED bulbs used in many machines where these heavy duty bulb tube lights got failed. LED bulb produces as quality lights as compared to heavy duty bulb operate in heavy current and gives us much more benefits of replacing and ease in using. LED bulb can be used under water where all legacy bulb got fail. All legacy source of light got burnt if one drop of water touched them but LED can work independently and give enough light to operate under water. Many bulb used in swimming poles to help the swimmer to judge his/her position in the water. LCDs bulbs are also available in different capacity of available current. LED bulb can operate at different types of situation and at different type of system. LED bulbs used in table lamp these led also used on the roof as a light source in the room or outside the room. LED bulb can operate for longer run and does not create any problem while operating, it works perfectly without any problem that is why LED bulb are getting more and more popular in the people. Many LED are generating more and more light without getting heated. Many LED are helpful in any type of equipments these can be used in electrical equipments and mechanical equipment as well. LED bulbs create much more lights with it without ant disturbance. These bulbs are efficient enough that adjust them self in low voltage but never get fails. These LED bulbs are more reliable then the legacy bulb and tube lights. Many LED bulb are being used as spot light on the roof at home or at office. LED of different types used at different places and at different capacity. Many systems of LED bulbs can be used in small places and many can be use at high places so that we can get benefits on all these places. LED bulbs are being manufactured by many companies. Now a day this is major benefits to get more and more profits because all people are switching towards LED bulb and getting more and more profit.LED Light Bulb

LED light will illuminate the future60 years since the 20th century, light emitting diode (LED) since the invention of this new type of widely used light source on the screen, lights, landscape lighting, light and other fields. In our daily use of light equipment, LED and incandescent lamps are, tied for the top three fluorescent lamps, LED light source can be said to have been deep into our lives. LED appears in the beginning, its more of a common light source appear. But with the technology, LED applications in the field has become even more broad, including LED TV, LED display, LED printer, LEDProjector Products have emerged. Other than incandescent and fluorescent lamps, LED light source shortest appear, but precisely because of this, its own strengths is more. It can be said, LED light source has been identified as the next most important source. Here, the writer’s technical characteristics for the LED light source of a preliminary study with you. LED is a new type of light source (Photo from Internet)LED commonly known as light-emitting diode, is a direct light energy into electrical energy to light-emitting display devices. GaAs LED made by earlier, as technology advances, and now they use a gallium phosphide (GaP) and other semiconductor materials. The biggest feature is the LED has a luminous efficiency, energy saving environmental protection, fast response, resistance to vibration. LED big screen inside the Bird’s NestLED light source can be the first issued to the color is red, into 90 by the end of the 20th century, LED has been able to send red, blue, orange, yellow, and green monochrome. In the end, into 1998, the white LED light source R & D success, and now the three-color RGB LED light sources have also been large-scale application. In our common display devices, the most common is the color white LED and RGB tri-color LED. Around the advantages of LED light sourceLight than ordinary equipment, LED light source with energy saving, high luminous efficiency, wide color gamut and so on, which is most of the shortcomings of traditional light sources. The previous article, we mentioned the most current source for the incandescent, fluorescent and LED lights. In the light effect, the incandescent light effect in the 12-24 lumens / watt, fluorescent light efficiency was 50-120 lumens / watt. According to information, white LED light source in 1998 when the recently launched energy efficiency of light is only 5 lm / W, when the light effect in 2005 has up to 50 lumens / watt, 2015 LED light effect may be achieve 150-200 lumens / watt. In addition, the industry statement, LED price of the original 10 had dropped to 1 / 10, while the performance will increase 20 times. Short life of ordinary bulbs Most readers know, our family frequently used incandescent lamps have a shorter life expectancy, etc., usually need a year or two to replace the light bulb, and LED bulbs theoretical value of up to 100,000 hours (usually nominal to 20,000 hours), life expectancy above 10 years, LED bulbs also greatly reduces the cost of user input, maintenance or replacement later. LED dot matrix layout LED dot matrix LED is generally used, if you need a higher brightness LED bulbs thousands of permutations and combinations. However, LED light bulb fast response, especially in the large screen display, you can use to change the characteristics of rapid switching of different images. We mentioned above, the current is divided into RGB LED RGB and white LED. White LED cheaper, lower power consumption, while the RGB LED color gamut wider expensive. LED backlight in the TV, monitors, notebook screens applications to ensure a longer life, lower power consumption, wider color gamut, color and more uniform. Meanwhile, LED light source also make these electrical planar (LED screen thinner). LED bulbs because they do not contain mercury, pollution of the environment are greatly reduced. In addition, LED light source also has anti-vibration characteristics of a wide color gamut.

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