Posted by admin | Posted in Baked Goods | Posted on 01-06-2011
Tags: art, color led, color led bulb, color led lighting, color led lights, color led printer, design, diy, electronics, led

LED
here has been no fundamental advances in traditional ligh
LED was discovered accidentally in the early last century (1907). In stage initial development, the silicon carbide crystals used as light-emitting active material. Nick Holonyak Jr. of General Electric Company developed the first LED visible spectrum practice in 1962.
Indoor LED: An LED is a semiconductor device that converts electrical energy directly light. The most important part of an LED is the semiconductor chip located in the center of the bulb. In its most basic level, the semiconductor consists of two regions. P-region contains positive electrical charges while the n-region contains negative electrical charges.
Construction: A way to build an LED is to deposit three layers of semiconductor on a substrate. Among the p-type semiconductor layers and n-type active region emits light when a recombination of electrons and holes. Given the combination of a pn diode,
when the diode is forward biased, holes from the p-type material and
electrons in n-type material are trained in the active region, and the light is produced by a semiconductor process called electroluminescence. In this particular design, the layers
LED lighting throughout the layered structure and
LED structure is placed in a small cup of light reflection for the active layer is reflected back to the desired output.
LED and color of the emission determination: When sufficient voltage is applied to the chip through The LED drivers, the current begins to flow. The electrons in the region of 'n' have enough energy to move through the region connecting "P". When an electron moves sufficiently close to a positive charge in the region of 'p', the two charges recombine. For each recombination a negative and a positive charge, a quantum of electromagnetic energy is emitted as a photon. LED emits incoherent LED emits incoherent narrow-spectrum light when electrically biased in the forward direction. This effect is a form of electroluminescence. The color of light emitted depends on the chemical composition of semiconductor material used and can be near-ultraviolet, visible or infrared. Usually, a combination of chemical elements such as gallium, arsenic and phosphorus is used.
LED Terminology:
AlInGaP: preferred technology of LED chips that contain aluminum, indium, gallium and phosphorus to produce red, orange and yellow
colors
Ben: The systematic breakdown of the distribution performance parameters (Flux, Color or CCT, and Vf) in small groups that meet aesthetic
needs of all
Binning: Subdivision of the parts manufactured in the town of water tanks (color flow, and stress)
Candela (Cd): The intensity light as defined by international standard metric (SI). The term, preserved since the early days of the lighting, sets a standard candle fixed size and composition as a basis for assessing the intensity of other light sources
Chromaticity diagram: A line in the form horseshoe connecting the chromaticities of the color spectrum
Tone: The situation hence the appearance of different colors are similar, for example, corresponding blue and pink
Lightweight: A wide of gray between black and white
Chroma: The degree of deviation of gray at the same brightness and color, for example, pure red red red
color gamut: The range of colors in the diagram chromaticity included in the combination of different sources
color spectrum: all the wavelengths perceived by the sight of man, usually measured in nanometers (Nm)
Color Temperature: The effect of heating an object until it glows brightly. La la radiation, and the apparent color change proportional to temperature. This can be considered during the review of hot metal in a forge that glows red, then orange, then
white with increasing temperature.
Cool white light with a correlated color temperature between 5000 ° K K 7500, often regarded as something blue
Correlated Color Temperature: The term used to describe the temperature at which a body Planck black radiator and a light source appearing party, usually specified in degrees Kelvin (K)
Color rendering index (CRI): The calculation of a color reproduction of the object. The higher the CRI (based on a scale of 0-100), plus
natural color. The natural outdoor light has a IRC 100. Common light sources have a wide range of IRC.
Announcer: An optical element used to mix the light beams improve consistency
Driver: Electronics, used for electric light sources
Efficiency (efficiency light): The light output of an electric light source, divided by the total power to the source, expressed in lumens per watt (lm / W)
Epoxy: organic polymers frequently used in a dome or lens, often prone to optical degradation over time, maintaining that flow poor.
light sources contain no epoxy-power and offer higher lumen maintenance.
Flow: The sum of all lumens (Lm) emitted by a source
InGaN LED The LED semiconductor technology containing preferred indium, gallium and nitrogen sources to produce green, blue and white LED light
Kelvin temperature: Time and the symbol (K) used to indicate the comparative color appearance of a light source compared to
theoretical black body. 3000K incandescent lamps are yellow. fluorescent sources range from 3000K to 7500K and above.
Lumen (lm): The International (SI) unit of luminous flux or quantity of light. Is equal to the amount of light extends from 929 sq.cm
surface light intensity when all parts of the surface are exactly 30 inches from source of light. For example, a dinner candle provides
about 12 lumens. A 60 W incandescent lamp provides 840 lumens sweet white.
Lumen maintenance: The remainder of flow in the design life of a light source
Lumen maintenance curve: a graph comparing loss light output over time the light source is used
Lighting: recessed lights installed and complete with accessories
Lux (lx): The SI unit of illuminance or luminous flux in a unit area, often defined as one lumen per square meter (lm/m2)
Metameric: The term used to describe the phenomenon of visual perception in which spectrally different sources mixed in a chrome third. For example, Sir Isaac Newton discovered that whites perceive to observe mixing blue and yellow.
Nits: To measure the brightness screen. 1 nit = 1 cd/m2. Nits, the image is bright.
NTSC color space: The range of colors in the CIE chromaticity diagram included in the combination of phosphorus based on RGB sources
Such as cathode ray tubes for televisions and computer monitors
of Planck black body place: The line of CIE chromaticity diagram, which describes the color temperature of an object when heated around 1000K to over 10,000 K
warm white light with a correlated color temperature between 3000K and 3500K, typically perceived as a little yellow.
Point White: Coordinates Color Temperature (CCT), defined by a line perpendicular to the curve of Planck's black body and cut
chromaticity measured
target = "_blank" title = "Engineering Services"> Engineering Services
About the Author
luxeed color changing led keyboard
[affmage source="ebay" results="100"]Color Led[/affmage]









