what is the definition of led
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TheLEDLight.com - What IS ... LED Definitions LED stands for light emitting diode. LEDs are a solid state device and do not require heating of a filament to create light. Rather, electricity is passed through a chemical compound that is excited and generates light. LEDs are not bulbs or lamps in the true sense of the word and application.
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- Cancel. The definition of LED is light emitting diode, which is now used in traffic lights, tail lights, alarm clocks, flashlights and many other products. Find out how LEDs save energy with helpful information from a digital lifestyle specialist in this free video on electronics.
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- A LED driver is an electrical device that regulates the power to an LED or string(s) of LEDs.he power level (or ‘Speed’) of the LED is maintained constant by the driver as the electrical properties change (amount of ‘gas’ or power needed) throughout the temperature increases and decreases (or ‘hills and valleys’) seen by the LED(s).
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Background on LED Lamp Market LED Integrated Fixtures & LED Replacement Lamps. Without question LEDs (Light Emitting Diodes) are fast replacing incandescent lamps in the landscape lighting world. An LED is a solid state semiconductor that emits light when an electrical current is passed through it. They have no filament so LEDs are much more robust than incandescent lamps.
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Definition of a Leader A leader by its meaning is one who goes first and leads by example, so that others are motivated to follow him. This is a basic requirement. To be a leader, a person must have a deep-rooted commitment to the goal that he will strive to achieve it even if nobody follows him! Joshua was such a man.
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- Technical Definition: A unit quantity of electricity equal to the quantity carried past any point of a circuit in one hour by a steady current of one ampere. Light Emitting Diode (LED) Practical Definition: A very small light source used in electronics.
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OLED LCD is liquid crystal display, used in computer monitors and handheld devices; LED is a light emitting diode, and are used in some TV's and devices. LED's are the small, brigh…t lights, like a camera or phone flashlight.
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- Contents on the CD Rom. 1  A light-emitting diode (LED) is a semiconductor diode that emits incoherent narrow-spectrum light when electrically biased in the forward direction of the p-n junction. This effect is a form of electroluminescence. 2  LED chips and wafers :-. The semiconductor chip consists of active layers that emit the light and the substrate, which supports the structure and upon which the active layers are grown. As with computing chips, they are produced in wafer form and then cut into chips. Packaged LEDs.
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Light-emitting diode A light-emitting diode is a two-lead semiconductor light source. It is a p–n junction diode that emits light when activated. When a suitable voltage is applied to the leads, electrons are able to recombine with electron holes within the device, releasing energy in the form of photons. This effect is called electroluminescence, and the color of the light is determined by the energy band gap of the semiconductor. LEDs are typically small and integrated optical components may be used to shape ...
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- Light-emitting diode. A light-emitting diode (LED) is a two-lead semiconductor light source. It is a p–n junction diode that emits light when activated. When a suitable voltage is applied to the leads, electrons are able to recombine with electron holes within the device, releasing energy in the form of photons.
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- The energy efficiency of LED products is typically characterized. using efficacy, which in basic terms is the ratio of power input to. light output—or more technically, emitted flux (lumens) divided. by power draw (watts).1 For such a simple concept, however, there are several important nuances that must not be overlooked.
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- LEDs are semiconductor diodes, electronic devices that permit current to flow in only one direction. The diode is formed by bringing two slightly different materials together to form a PN junction (Figure 2).
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- The First LED patent (click to enlarge) You can clearly see the p/n junction in the patent drawing. The p/n junction is a single crystal with two types of semiconductors created by doping. The First LED patent (click to enlarge). You can clearly see the p/n junction in the patent drawing.
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lead leading. 1  transitive verb. 2  1a : to guide on a way especially by going in advance led the officers to his hiding placeb : to direct on a course or in a direction a road leading the traveler to the heart of the cityc : to serve as a channel for a pipe leads water to the house. 3  2 : to go through : live lead a quiet life.
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LED (Light Emitting Diode) Light Bulb Types. LED light bulbs or lamps utilize light-emitting diodes in order to produce light. LED is a “solid-state” technology, which means that the materials used to generate the light are encased within a solid material. Practically, this translates into a lamp with a rated life much longer than those using non-solid-state technology (such as incandescent, halogen, and fluorescent).
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- Answer: SMD is one of the componets,it is short for theSurface Mounted Device. Qustion three: What is high power led ? Answer: High power led is a kind of light emitting diodes with big rated current,the working current can reach 1W,2W even higher while the current of the common light is usually 0.05W.
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LED - light emitting diode Abbreviation of light emitting diode, an electronic device that lights up when electricity is passed through it. LEDs are usually red. They are good for displaying images because they can be relatively small, and they do not burn out. However, they require more power than LCDs.
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Led vs. lead Led vs. lead. The verb lead makes led in the past tense and as a past participle. Writers often mistakenly use lead in these roles, perhaps due to erroneous analogy with the verb read, which is uninflected. Lead is of course the correct spelling for the malleable, bluish-white element used in pipes, solder, bullets, and paints. 12 Comments.
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- Lead (/lɛd/) is a chemical element in the carbon group with symbol Pb (from Latin: plumbum) and atomic number 82. Lead is a soft, malleable and heavy post-transition metal. Metallic lead has a bluish-white color after being freshly cut, but it soon tarnishes to a dull grayish color when exposed to air.Lead has a shiny chrome-silver luster when it is melted into a liquid. It is also the heaviest non-radioactive element (some radioactive elements, like technetium, are lighter).ead has only one common allotrope, which is face-centered cubic, with the length of an edge of a unit cell being 349 pm. At 327.5 °C (621.5 °F), lead melts; the melting point exceeds that of tin (232 °C, 449.5 °F), but is significantly below that of germanium (938 °C, 1721 °F).
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Careful design delivers halogen-like LED dimming (MAGAZINE) LEDs create light through electroluminescence. Light is emitted when electrons and holes recombine in a material, most commonly a semiconductor. The spectrum, or color, of light emitted is determined primarily by the constituent materials of the semiconductor and by phosphors — chemicals used to coat the LED die.
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- 1.1 Technical introduction : Physical function. Like a normal diode, the LED consists of a chip of semiconducting material impregnated, or doped, with impurities to create a p-n junction. As in other diodes, current flows easily from the p-side, or anode, to the n-side, or cathode, but not in the reverse direction.
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light-emitting diode (LED) Part of the Electronics glossary: Also see laser diode. A light-emitting diode (LED) is a semiconductor device that emits visible light when an electric current passes through it. The light is not particularly bright, but in most LEDs it is monochromatic, occurring at a single wavelength. The output from an LED can range from red (at a wavelength of approximately 700 nanometers) to blue-violet (about 400 nanometers).
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- Top definition. guide. To lead or control someone, particularly when they are in a suggestible or intoxicated state. Detra, I guided you. You've been guided. #lead#intoxication#suggestible#detra#control. by proscriptionist October 21, 2009.
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What is an LED Driver To get the best performance out of your LED light or array, you're going to want an LED driver. If you're not familiar with the term, an LED driver is a power supply that is self-contained and which has outputs that are matched to your LED or LED array's electrical characteristics. The Need for LED Drivers.efore designing or selecting a driver circuit, you should also know the two ways of controlling forward current. The first is using the LED VI curve in order to determine how much voltage should be applied to the LED to get the forward current that you want.
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- A light emitting diode (LED) is a solid-state light source, consisting of semiconductor materials that are doped to form a p-n diode junction. When biased in the forward direction, charge carriers, i.e., electrons and holes, flow into the junction, where they recombine while releasing energy in form of a photon.
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diode LINK / CITE ADD TO WORD LIST. noun. The definition of a diode is an electronic device with two transmitting terminals that allows electric current to flow in one direction while blocking current in the opposite direction. An example of a diode is a light-emitting diode, an LED.iode. noun. 1  An electronic device that restricts current flow chiefly to one direction. 2  An electron tube with a cathode and anode. 3  A two-terminal semiconductor device used chiefly as a rectifier.