LED lighting - solar energy and LED combined with

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Lighting sources in the past hundred years, has gone through three important stages: incandescent, fluorescent, HID lamps. Which is the first generation of light incandescent, fluorescent is the second-generation light sources, high-intensity gas discharge lamp is the third-generation light sources (HID). Today, LED light source has a broad development prospects in the lighting industry has been called the fourth generation light source. LED as a novel semiconductor light sources with long life, high luminous efficiency, low power consumption, short startup time, solid structure.

(1) solar photovoltaic power led ceiling lights principle:

Solar photovoltaic power generation is to rely on solar cells, the use of the electronic characteristic of semiconductor materials, semiconductor PN junction when exposed to sunlight, strong built-in electrostatic field due to the P-N junction barrier area, resulting in the potential barrier non-equilibrium electron and hole in the zone or generated in the barrier region but non-equilibrium electron and hole diffusion into the barrier area, built-in electrostatic field, each movement in the opposite direction, leaving the barrier region, a result, the potential o f the P region increased, lower N potential in voltage and current to the outer circuit to convert light into electrical energy. Solar PV systems can be roughly divided into two categories, one is the grid system, and the utility grid connected through a standard interface, like a small power plant; the other is a stand-alone power generation system, that is, in their own closed system formed within the circuit. And the grid system by the photovoltaic array will receive the solar radiation energy after a high-frequency dc converter into a high-voltage direct current, after the inverter after the inverter output to the grid and the grid voltage with frequency in-phase sinusoidal AC current. Stand-alone power generation system PV array will first receive the solar radiation energy is directly converted into electrical energy supply load, and the excess energy in the form of chemical energy stored in the batteries after charging controller.

2.LED lighting advantages:

Outside of the LED semiconductor lighting in addition to a long life, high luminous efficiency, small size, light weight, reliable and environmentally safe, there is a significant advantage is that LED start-up voltage and operating voltage, without the use of ballast . This saves costs and energy consumption while also greatly reducing the response time through power outages.

(3) a combination of solar and LED lighting

The key lies in solar photovoltaic technology and LED lighting a perfect combination of both direct current, low voltage and can be matched. The combination of the two do not need the solar cells produce direct current into alternating current, thus greatly improving the efficiency of the entire lighting system. The same time, by means of network technology or the use of battery charge and discharge energy, to make it more obvious advantages. With the in-depth study of related technologies, led rope lighting luminous efficiency is improved, high brightness LED to come out, is bound to replace the electric light of the general lighting and a large number of energy saving and pollution-free.

LED operating current is the DC and low voltage. Solar light energy into direct current energy, solar components through series and parallel combinations to get the actual needs of the voltage. These characteristics coincided with the LED to match, will receive a combination of both high energy efficiency, high safety performance and reliability, to achieve energy saving, environmental protection, safety, and efficient lighting systems, to achieve the perfect combination.