Hello, friends, I hope you all are doing great. In today’s tutorial, we will discuss the Difference Between LED & Diode. The basic difference LED and diode is that when current flows through the LED it releases light while the diode converts ac current into dc and this process is called rectification. The circuit used in the diode for ac to dc conversion is called a rectifier. The LED is constructed with Germanium arsenide that has the ability to emit light. But the diode is constructed with the N and P types of materials that use to change the direction of current from variable to single direction.
In today’s post, we will have a detailed look at both LED and diode and compare them to find their differences. So let’s get started with the difference between diode and led.
Difference Between LED & Diode
LED
- LED is a diode that emits light when current flows through it.
- It is constructed with the GaAs and GaP.
- It working operation is based on the conversion of electrical energy into light energy.
- Its reverse breakdown voltage value is less than the diode.
- LED uses less energy than a normal incandescent bulb, with less cost.
- It is employed in different areas, like the aviation industry, lights of vehicles, signal
- It does not need any backlight.
- Its switching speed is fast.
- There is no effect on the LED of DC current.
- Its contrast ratio is less than the LCD.
- its display area is smaller than the LCD.
- It is created with the Gallium arsenide phosphide..
- The on-condition voltage range for the light-emitting diode is 1.2 volts to 2.0.
- It is used in seven-segment displays and different lighting systems.
- The IR type of LED used in your tv remote control
- The first type of LED design has a red color and less intense
- Now LEDs exist in visbile , UV and IR lights
Diode
- It is a semiconductor device that is used for rectification or ac to dc conversion.
- There are different types of diodes like Zener and step recovery.
- there are two types of modes of operation in diode first one is forward biased and the second one is reverse biased
- In reverse biased anode is connected to the negative terminal and the cathode to the positive terminal of the battery.
- The current flow in the diode is due to two types of charge carriers the first one is a hole and the second one is electrons.
- There are two parts of the diode first is positive and the second is negative has electrons as carriers and P has holes
- The material used for the construction of a diode is silicon and germanium.
- Its reverse breakdown voltage value is less large than the LED.
- Its operating voltage value for the case of silicon is 0.7 volts and germanium is 0.3 volts.
- It is used as a rectifier, in clamping circuits, etc.
The Working Principle of Diode
- The p-n junction is the basis for how a diode functions. The electrons flow from N material to P material during the forward bias and they stop the current flow in a reverse-biased state.
- if the diode is forward biased it has less resistance and for reversed biased has high resistance
The Working Principle of LED
- The p-n junction serves as the foundation for an LED as well, however, it operates on the electroluminescence principle. A forward-biased LED releases energy in the form of photons when the electrons and holes recombine. it is called electroluminescence. The bandgap energy of the semiconductor material used in an LED determines the wavelength of the light it emits.
LED Vs Diode
LED
- It releases the light when current flows through it
- Its structure is larger and more complicated
- It needs less power than the diode
- It needs a certain voltage to turn on
- It used in displays and lighting system
- It releases light in differnt colors
- it used as an indicator in electronic devices
- It has less breakdown voltage
- Has a wider viewing angle than a diode
- More expensive than a diode
- higher luminous efficiency than a diode
- longer lifespan than a diode
- Has a higher light output than a diode
- Operates at a lower voltage than a diode
- Can be used in dimming applications
- it is used in backlighting applications
- It isn’t easy to control
- It can generate different lighting effects
- it used for lighting vehicles
- it needs a heat sink for heat dissipation
Diode
- It does not emit light when current flows
- Its size is a smaller and simple construction
- it permits current to flow in one direction
- It uses more power than LED
- It is used in rectifier circuits and voltage regulation
- It does not emit light and is colorless
- It used as a switch or protection device
- Its breakdown voltage is higher than an LED
- lower luminous efficiency than an LED
- narrow viewing angle
- Cannot be used in dimming applications
- shorter lifespan than an LED
- Operates at a higher voltage than an LED
- Less expensive than an LED
- It can be easily controlled
- Has a lower light output than an LED
- it is not used in backlighting applications
- it produces the lighting effects
- It is not used for lighting in vehicles
- it needs a heat sink based on applications
FAQS
Are LED lights a diode?
- LEDs are semiconductors that are known as light-emitting diodes. White LED has gotten practical applications since uses high-brightness blue LED made in 1993 through Gallium Nitride,
Why is LED called diode?
- LED needed diode since process through charge carriers recombine in forward biased diode junctions releases accurate energy for making photons of visible range
What are the similarities between LED and diode?
- They are semiconductor devices and polarity-sensitive components. They have the same VI featues also if they come with different cuts in voltage. The LED is maximized for releasing light and comes wit low fixed current features. The rectifier’s diode carries a larger current.
That is all about the difference between diode and LED if you have any queries ask in the comments. Thanks for reading have a good day.