|LED Lighting Bases Intro|
LED (LightingEmittingDiode) lighting is LED lighting, is a solid light-emitting semiconductor devices. It is the use of solid semiconductor chip as the light-emitting materials in the semiconductor compound occurs through the carrier excess energy release caused by photon emission, the direct issue of red, yellow, blue, green, blue, orange, purple, white light. LED lighting products that use LED as a light source created by the lighting apparatus.
The current global energy shortage in the context of increasing concerns once again, energy conservation is an important issue facing the future in lighting, LED light product applications are attracting the attention of the world, LED light source as a new type of green products must be the future trend of the twenty-first century will be entering a new type of LED light source represented by the times. LED light source is known as fourth generation or green light, energy saving, environmental protection, long life, small size and other characteristics, can be widely applied in various directions, display, decoration, backlight, general lighting and night areas of the city. In recent years, a number of developed countries around the world, the development of LED technology in a fierce competition. Since 2000, the U.S. investment 500 million U.S. dollars of the "National Semiconductor Lighting Plan", the EU also in July 2000 announced the launch of a similar "Rainbow plan." China's Ministry of Science and in the "863" program with the support of the first time in June 2003 proposed the development of semiconductor lighting program.
Advantages of LED lighting:
High energy: saving energy is clean and shall be environmentally friendly. DC drive, ultra-low power consumption (single tube 0.03-0.06 W) electro-optical power conversion close to 100%, the same light energy than traditional lighting effect more than 80%.
Long life: LED light source that some people call longevity, which means everlasting light. Solid cold light source, epoxy resin, light body and no loose parts, there is no filament light easy to burn, heat deposition, the light fades and other shortcomings of life of up to 60,000 to 100,000 hours, longer life than conventional light sources 10 times above.
Many changes: LED light source can make use of red, green, blue three-color theory, under the control of computer technology to make three colors with 256 gray levels, and any hybrid, you can generate 256 × 256 × 256 = 16777216 colors, forming different light combination of changing color to achieve a variety of dynamic changes and various image effects.
Environmental benefits: environmental benefits of better, no UV and infrared spectra, neither heat nor radiation, glare small and recyclable waste, no pollution, no mercury elements, cold light source, safe touch, typical of the green lighting.
High point: with the traditional light source compared to the monotonous glow, LED lighting is low voltage microelectronic products, the successful integration of computer technology, network communication technology, image processing, embedded control technology, so it is also digital information products, is Semiconductor optoelectronic devices "high point" technology, with online programming, unlimited scalability, flexible features.
LED lighting terminology:
Wavelength: the color of light intensity changes, is described by the data, such data is called wavelength. We can see the light of the wavelength range between 380 to 780nm. Unit: nanometer (nm)
Brightness: Brightness refers to the degree of light and dark objects, defined as the luminous intensity per unit area. Unit: Bennett (nit) Intensity: refers to the brightest light. Also means that the light source in a certain direction and the visible light emitted radiation within the physical strength.
Unit: candle (cd)
Luminous flux: the visible light emitted by the amount per second sum. Unit: lumen (Lm)
Light effect: the flux divided by the light source to issue power. It is an important indicator to measure light energy. Unit: lumens per watt (Lm / w).
Coloration: Light on the extent of the object presented, that is, the degree of color fidelity. Usually called "color rendering index" units: Ra.
Color Temperature: The color of light emitted light at a temperature blackbody radiation of light hue also known as the blackbody temperature of light source color temperature.
Unit: Kelvin (k).
Glare: Vision of a high brightness of the brightness of an object or a strong contrast, the visual discomfort as glare, glare is an important factor affecting the quality of lighting.
Synchronization: two or more LED lamp does not require time to properly set according to the procedure run, generally refers to the internal control method of LED lamps, LED lamps to achieve synchronization yes coordinated changes in the basic requirements.
Protection class: IP protection class is the lamp according to dust, moisture characteristics to grade, formed by the two figures, the first number represents the light dust, to prevent the intrusion of foreign materials level (sub-level 0-6 ), the second number represents the lamp against moisture, water intrusion and sealing of (min 0-8 grade), with higher numbers indicated higher levels of their protection.