You might be familiar with the term LED, maybe you heard it about your monitor or TV at home. The technology behind LEDs is quite recent as it was first invented in 1962. However, since the LED did not have that much practical use due to its limitations that it only produced RED visible light. Then the first high brightness blue LED was developed in 1994 and then by adding a phosphor the first white LED was created. From then on LEDs have been used in many different devices. Due to their efficiency, they have even replaced the standard incandescent lights, and are used not only in electronics but in lights, signs, billboards and many more. LED are quite an interesting technology, as their use has helped humanity save a lot of electrical energy.
What is a Diode
This is an electrical component that has specific properties. It has two connectors, which are referred to as anode and cathode. It is a semiconductor that acts as a one-way switch. The electrical current flows only in one direction, and it restricts it in the opposite. Usually, diodes, allow electricity only when a positive voltage is connected with the anode. It is mainly used in rectifier electrical circuits, as it can change alternating current into direct current.
Types of diodes
There are many different types of diodes, here are some examples:
- small signal diode – this is a device with disproportional characteristics which is used mainly in high frequency low current devices like TVs.
- large signal diode – they are mainly used in battery chargers.
- zener diode – this a device that is designed to prevent semiconductor devices from voltage pulses.
- light emittion diode – this is a type of diode that convers electrical energy into light.
- schottky diode – this is diode that has high current conducting capability, they are mainly used in high frequency rectifiers.
- tunnel diodes – they are used as high speed switch, which reacts really fast. They are mostly used in amplifiers.
What is an LED
The abbreviation LED stands for light-emitting diode. It is composed of two types of semiconducting material (which are p type and n type). Those materials are dipped into substances to change their electrical properties. When the diode has an electrical source connected the current will flow through it and it will emit light.
Where do we use LEDs
LEDs have low power consumption and are preferred method of light emitting device in many different areas. They are mostly known for being used in displays of TV/Monitors and mobile devices. They are often used as indicator lights in different machines and vehicles, they are also used in the making of a billboards, diferent signs what many many more. As LED can come in different sizes and has good durability, it has many applications in various areas. Its popularity grew from monitors and TVs as they are often marketed as LED 4K TV for example. It is right in there with their resolution. LEDs can come in different colors, and since most displays use RGB method it requires red green, and blue light, which LED can produce, and it can be produced in small size – perfect for high DPI displays, LEDs are a great choice for such technology. Most modern displays have resolutions of 4k which has standards of 3840×2160 which is 8294400 individual pixels.
Why do we use LEDs
LEDs have many many advantages in comparison to the most common used standard incodescent lights.
- LEDs have a long life
- They are energy efficient
- They offer high brightness and intensity of color
- They have a great color range
- LEDs have low heat production
- and many more
They provide high quality image, with high durability and low energy consumption, which is a great choice for each display. Especially with devices such as cell phones that have batteries and it requires a lot of energy.