What are the characteristics of LED?

Characteristics of LED

• Light Generated by LED is Directional. A. LED is all forward directional lighting, not Omni as conventional light bulb.
• LED can Generate Different Light Color. A.
• Temperature will Affect LED Efficacy. A.
• Low Energy Consumption. A.
• Long Life.

Why does the color of an LED affect the forward voltage?

The forward voltage rating has to be met in order to light the LED, and that rating varies according to the LED color. The reason for this is that to produce different colors, different materials are used in the semiconductor portion of the LED.

What happens if you put too much voltage through an LED?

Simply put, too much voltage kills the LED. Therefore, if the voltage deviates more than 10\%, the LED bulb is fused off. Subsequently, the electronic parts inside the LED bulb get damaged from the voltage spike.

Which Colour LED has the highest forward voltage drop?

The LED voltage VL is determined by the colour of the LED. Red LEDs have the lowest voltage, yellow and green are a little higher. Blue and white LEDs have the highest voltages.

What is LED application and characteristics?

LED light bulbs are designed to convert electrical energy into light through a microchip which then illuminates the tiny light sources which produce visible light. This process uses up to 90\% less power than traditional incandescent and fluorescent bulbs. LED lights are directional light sources.

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.

WHAT LED forward voltage?

The forward voltage defines the amount of voltage required for the current to flow through the diode junction. Any voltages below this level cause the LED to remain “open” or non-conductive. Current is allowed to flow through the LED once the voltage drop across it reaches the forward voltage.

What is the voltage of LED?

on LED datasheets. Typically, the forward voltage of an LED is between 1.8 and 3.3 volts. It varies by the color of the LED. A red LED typically drops around 1.7 to 2.0 volts, but since both voltage drop and light frequency increase with band gap, a blue LED may drop around 3 to 3.3 volts.

How can we protect LED from too much current?

3) There is Such a Thing as Too Much Power For this, we employ resistors. Resistors limit the flow of electrons in the circuit and protect the LED from trying to draw too much current.

What is the maximum voltage for LED?

LED V/I characteristics

Why do LEDs have different voltage drops?

The forward voltage drop differs between different colors of LED because they are made of different semiconductor materials. Most LEDs now use . Every choice of x, the proportion of In such that x = 1 means pure InN and x = 0 means pure GaN, produces a different band gap and is thus a different semiconductor.

Where do we use LEDs?

Made popular by their efficiency, range of color, and long lifespan, LED lights are ideal for numerous applications including night lighting, art lighting, and outdoor lighting. These lights are also commonly used in electronics and automotive industries, and for signage, along with many other uses.

What are the characteristics of LED light emission diode?

Light Emitting Diodes I-V Characteristics. In most cases LEDs are operated from a low voltage DC supply, with a series resistor, RS used to limit the forward current to a safe value from say 5mA for a simple LED indicator to 30mA or more where a high brightness light output is needed.

What is the typical forward voltage of a yellow LED?

Example 2: If you are using a yellow LED, then it has a typical forward voltage of 1.8 V. Hence, resistor values of 75 Ω, 160 Ω, 360 Ω, and 510 Ω, can be utilised when the supply voltages are 3.3 V, 5 V, 9 V, and 12 V, respectively.

What are the resistor values for LED lights?

Hence, resistor values of 75 Ω, 160 Ω, 360 Ω, and 510 Ω, can be utilised when the supply voltages are 3.3 V, 5 V, 9 V, and 12 V, respectively. The voltage across the rail Vs is equal to the sum of voltages across the LED and resistor.

What is the voltage range for each color of led?

Chart by Colour LED Colour Forward Voltage Vf Forward Current If White 3.2 V to 3.8 V 20 mA to 30 mA Warm White 3.2 V to 3.8 V 20 mA to 30 mA Blue 3.2 V to 3.8 V 20 mA to 30 mA Red 1.8 V to 2.2 V 20 mA to 30 mA