Advantages and disadvantages of LED

Advantages and disadvantages of LED
Advantages and disadvantages of LED

The LEDs (light-emitting diodes) is a semiconductor components that will emit light when electricity passes through them.

A combination of electron holes releases the energy in the form of photons, the energy of the protons will determine the color of the light LEDs produces.

Advantages of LED

  • Long life span
  • Less maintenance
  • High efficiency
  • Low power consumption
  • Rugged
  • Environment friendly
  • Protection from the effect of temperature
  • Shock resistance
  • Simple design
  • Simple fabrication
  • Simple drive circuitry
  • High reliability
  • It had a good color rendering index (CRI)
  • High-speed switching
  • Good adaptability to coherent laser operation
  • No warm-up period
  • Less affected by cold temperature
  • It is more damage resistant
  • No usage of mercury
  • They don’t emit UV or infrared rays
  • They provide high-quality light distribution
  • They had a wide range of color varieties
  • We can design LEDs in any shape and size.

Explanation for advantages of LED  

Long life span

The LEDs have a long life span, this is because of the process behind the making of the light-emitting diode.

Less maintenance

The light-emitting diode (LED) had less maintenance, this is because faults acquires at them are very limited.

Low power consumption

Technically light-emitting diodes (LED) are semiconductor material devices that consume less power, commonly silicon is the building block of semiconductor devices like LEDs.

Protection from the effect of temperature

The semiconductor devices like LEDs normally had problems due to the effect of temperature, so in LED fabrication temperature protection is a must thing to implement at it.

Simple drive circuitry

The LED have negative and positive polarities, which means we need to connect the right polarities to operate them and this is the only complication with the LED circuitry.

High-speed switching

We can easily switch ON & switch OFF LEDs, all we need is a simple circuit for switching operations.

Wide range of colors

A wide variety of colors variations is there in LEDs, different semiconductor material combinations are been used  

Disadvantages of LED

  • They are temperature dependence components
  • Voltage sensitivity
  • High initial price
  • LEDs cause backward heat dissipation
  • Electrical polarity
  • Efficiency droop
  • Refraction of light at semiconductor to air/interface
  • Low coupling efficiency
  • Large chromatic dispersion
  • Incoherent light source
  • Spontaneous emission and non-linear output characteristics

Explanation for disadvantages of LED  

Temperature dependence

We know LED components are semiconductor devices, so naturally, temperature variations will make changes to them and this is why LEDs are known as temperature depended on components.

Voltage sensitivity

The LEDs are voltage-sensitive components, higher voltage than its range will cause problems in it.

Efficiency droop

It is a main demerit of LEDs, as when the current increases at the LEDs the efficiency tails off in a phenomenon known as efficiency droop.

So at LEDs, the drive current is much higher than those for which efficiency is optimum.

Low coupling efficiency

The coupling efficiency of LEDs are been mainly identified on optical fiber coupling.

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