Do you remember those old-styled TVs that were powered by cathode-ray tubes CRTs? They were huge, heavy, and consumed a lot of power. Some giant versions were around 30-60 cm deep and extremely heavy to lift for yourself.
Thankfully, with the introduction of LCD technology, CRT TVs have become a thing of the past. These days LED TVs have dominated the TV market, but the even more improved technology is the OLED TVs.
In this article, we will discuss everything you need to know about OLEDs, including the working principle of OLEDs and the benefits of OLEDs.
What are OLED’s?
Organic Light-emitting diode (OLED) is a solid-state device that consists of a thing carbon-based semiconductor layer which emits light when current is applied at the adjacent electrodes. The building blocks of OLEDs are carbon-based materials. LEDs are small-point light sources, whereas OLEDs are made in thin sheets that are diffuse-area light sources. OLEDs do not require a backlight filter (like LCDs do) and are more efficient, easier to make, and much thinner.
OLED technology is progressing by leaps and bounds. There are a handful of features of these devices which make them better than their LED counterparts. OLEDs offer an exceptional picture quality and distinctive, unique design, which instantly mesmerizes the spectator’s attention.
Furthermore, OLEDs deliver the best picture quality, brilliant colors, fast response rate, infinite contrast, and wide viewing angles. In addition to that, OLEDs can be used to make OLED lightning-thin, efficient, and do not involve any bad metals.
Structure of an OLED
An OLED consists of the following parts
It is clear plastic, glass, or foil that supports the OLED.
The anode is necessarily transparent and removes the electrons when current flows through the device.
Organic layers are made of molecules or polymers
The conducting layer is made up of molecules that transport “holes” from the anode. One of the conducting polymers used is OLEDs is polyaniline.
The emissive layer is made up of organic plastic molecules and is different from the conducting layer. It transports electrons from the cathode and is the place where the light is made. One of the polymers uses in an emissive layer is polyfluorene.
Cathode functions to inject electrons when current flows through the device. It may or may not be transparent.
Working of OLED
An OLED consists of a thin carbon-based semiconductor that emits light on the application of electricity at its adjacent electrodes. For the light to escape the device, at least one of the electrodes must be necessarily transparent.
The intensity of the light emitted depends on the amount of electric current applied by the electrodes, whereas the color depends on the type of emissive material used. In order to create white light, you can use red, green, and blue emitters that can be arranged in different configurations.
Advantages of OLED
The following are some of the unique advantages of OLED.
Offers a Higher Contrast Level
An OLED offers a much higher contrast level as compared to a standard LED display. An OLED display can control its pixels. These pixels can turn off themselves whenever they have to produce dark blacks. Resultantly, the pictures produced on an OLED TV offer vibrant color, unlike other television.
Offers Wide Viewing Angles
OLED TV allows you to watch content from any corner of your home without losing accuracy. An OLED has a compact build, and the distance between the pixels and the surface of the screen is non-existent. Resultantly, the pictures produced on OLED TV offer a better viewing angle.
Thinner and Flexible
An OLED display comes with special properties, which makes it thinner and flexible. This added feature makes it unique and elegant and enhances the beauty of the product.