LED stands for light emitting diode. LED lighting products produce light up to 90% more efficiently than incandescent light bulbs.An electrical current passes through a microchip, which illuminates the tiny light sources we call LEDs and the result is visible light.
What do you mean by LED?
light-emitting diode
light-emitting diode: a semiconductor diode that emits light when conducting current and is used in electronic displays, indoor and outdoor lighting, etc.
What is LED and its function?
Compared with conventional light sources that first convert electrical energy into heat, and then into light, LEDs (Light Emitting Diodes) convert electrical energy directly into light, delivering efficient light generation with little-wasted electricity.
What is LED and its types?
The Light Emitting Diode or LED as it is more commonly called, is basically just a specialised type of diode as they have very similar electrical characteristics to a PN junction diode. This means that an LED will pass current in its forward direction but block the flow of current in the reverse direction.
What is LED and its advantages?
Advantages of LED Lights
- Long life. The components of an LED and the way that they generate light significantly extend the lifespan of these bulbs.
- Energy efficiency.
- High brightness and intensity.
- Exceptional colour range.
- Low radiated heat.
- Reliability.
- Instantaneous illumination.
- Directional lighting.
What is basic principle of LED?
LED is a semiconductor optoelectronic device.The basic principle is that electrons and holes in semiconductors recombine and emit photons under forward bias.
Where are LEDs used?
Visible LEDs are used in many electronic devices as indicator lamps, in automobiles as rear-window and brake lights, and on billboards and signs as alphanumeric displays or even full-colour posters.
What is LED explain its construction working and application?
LED is a particular diode which generates photons (light) when a stream of electrons passes through it. To build a diode we use a crystal (electric insulator) which is doped by atoms which have one more electron on their valence band (N doping) or missing one electron on their valence band (P doping).
What are the advantages and disadvantages of LED?
Benefits and drawbacks of LEDs
- Lifetime. As solid-state light sources, LEDs have very long lifetimes and are generally very robust.
- Standardization. The general lack of standardization in the LED field is an ongoing issue.
- Low maintenance.
- Efficiency.
- Low power consumption.
- Brightness.
- Heat.
- Cost.
How are LEDs better for the environment?
LED lighting provides many environmental advantages, including being energy efficient, producing zero toxic elements, requiring less light fixtures, and having a longer life span.This upgrade means less energy use, reducing the demand from power plants, and decreases greenhouse gas emissions.
How many types of LED are there?
LED Colour
The light emitted by normal LED bulbs comes in three different varieties which are: Warm white which is used in most homes and is similar to current halogen bulbs. Cool white is a similar colour to fluorescent tubes such as those you find in shops and offices.
What is LED made of?
The particular semiconductors used for LED manufacture are gallium arsenide (GaAs), gallium phosphide (GaP), or gallium arsenide phosphide (GaAsP). The different semiconductor materials (called substrates) and different impurities result in different colors of light from the LED.
What is LED explain 10th class?
Light-emitting diode (LED) is a widely used standard source of light in electrical equipment. It has a wide range of applications ranging from your mobile phone to large advertising billboards. They mostly find applications in devices that show the time and display different types of data.
What colors are available in LEDs?
Commonly available colors of LED are red, green, blue, yellow, amber and white. The light from red, blue and green colors can be easily combined to produce white light with limited brightness. The working voltage of red, green, amber and yellow colors is around 1.8 volts.
What are the limitations of LED?
What are the disadvantages of LEDs?
- High up-front costs.
- Transformer compatibility.
- Potential color shift over lamp life.
- Performance standardization has not yet been streamlined.
- Overheating can cause reduced lamp life.
Why are LEDs more energy efficient?
The more lumens, the brighter the light.The LED bulbs require much less wattage than the CFL or Incandescent light bulbs, which is why LED bulbs are more energy-efficient and long lasting than the other types of bulb.
What impact do LED lights have on the environment?
LEDs Are Non-Toxic
They are also very harmful to the environment, as they contain toxic chemicals and elements, including mercury. This means that, when disposed of in landfill sites, these toxic elements can leech out and contaminate the environment.
Why LED lights are energy efficient?
Simply put: a LED light uses far less energy (watt) to produce the same light output (lumen). An example: a LED bulb uses only 2.5 watts to produce a light output of 115 lumen, while a traditional bulb uses 15 watts (or 6 times more energy!) to produce the same lumen output.
What are the main parts of LED?
Read below to learn about the parts that make up the Anatomy of a LED:
- Lens/Optics. Due to the brightness of LEDs, a lens (or optics when used on omni-directional lamps) is used to evenly distribute the light.
- LED Chips. LED chips are the components that create the light.
- Heat Sink.
- Circuit Board/Driver.
- Housing.
- Base.
What type of LED is best?
Branded Epistar SMDs are the highest quality 5050 LEDs on the market. They provide the best brightness, colour consistency and reliability with 70% output at 50,000 hours.
What are LED structures?
LED die structure
There are two basic configurations which can be used. Edge emitting LED structure: This form of LED structure emits light in a plane parallel to the junction of the PN junction.Surface emitting LED structure: This form of LED structure emits light perpendicular to the plane of the PN junction.
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