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All about screen technologies

LCD, OLED, LED … not easy to choose which is the screen technology? we will explain the different technologies to you without going into too technical details.

To fully understand the different technologies, let’s start with a brief reminder of how our televisions work. There are actually only two display technologies for our modern flat screens: LED and OLED.

The LED screen technology

LCD (Liquid Crystal Display) technology is the most widespread on the market. LED televisions (Light Emitting Diode). Backlit liquid crystals are actually LCD screens equipped with LED back-lighting. LCD screens cannot produce their own light (unlike OLED screens) It is necessary to emit a light behind them to be able to display an image. Formerly composed of neon tubes, the back light is now composed of LED diodes .

Today, there are two types of LCD panels: IPS (In Plane Switching) and VA (Vertical Alignment) panels. By the shape and properties of the liquid crystals used ,these types of tiles are distinguished .

This results in differences in terms of contrast, brightness or even more or less wide viewing angles. Also in the large LCD family, there are different types of LED back lights.

lcd screen technology

Edge LED back light

The Edge LED does not offer the best homogeneity in terms of back lighting. But has the advantage of consuming less electricity and occupying less space. It allows manufacturers to offer extremely thin screens.

Full LED or Direct LED back light screen technology

Unlike the Edge LED, Full LED screens (also called Direct LED) use a back light which occupies the entire surface behind the LCD panel. The back light is therefore more uniform and the brightness is greater.

The downside is that these televisions consume more electricity and are a little thicker. Some brands offer a back light provided by three LEDs (red, green and blue) instead of one, which allows better color rendering.

Mini-LED screen technology

It offers the same principle of back lighting to produce light. Which passes through an LCD matrix and color filters to display the final image.

But it is by the smaller size and the larger number of LEDs that the Mini-LED technology stands out.

By multiplying the number of LEDs, Mini-LED technology allows screens that use it to manage finer blacks on a small portion of the screen. It is similar to OLED and Micro-LED technologies which are capable of extinguishing each pixel to produce perfect black.

Coupled with a quantum filter (which we detail just below) which improves light and colorimetry, the Mini-LED technology aims to compete with OLED (and Micro-LED) technologies in terms of quality display.

 

OLED technology

The “Organic Light-Emitting Diode”, or OLED, technology marks a clear technological evolution compared to the original LCD technology.

OLED has the particularity of making its own light thanks to an organic substance which ignites on contact with an electric current. OLED therefore differs from LED technology because it does not need back lighting, the latter being directly integrated.

 

OLED screen technology

Quantum dot: QLED screen technology

Popularized by Samsung to compete with LG’s OLED, QLED (Quantum-dot Light Emitting Diode) technology is part of the family of LED screens

Only high-end LED televisions were equipped with QLED In the begining. But today this technology is also found on some mid-range TVs from Samsung, but also at TCL. Other manufacturers such as Sony or LG use quantum filter housings under the name of Triluminos or Nanocell.

 

qled

LED vs QLED: what differences?

QLED technology brings a clear improvement in color thanks to an extension of the color space to display 100% of the DCI-P3 spectrum.

The performance of the back light system is also improved to display peaks of brightness higher than what is usually found on conventional LED televisions.

On the other hand, QLED does not make it possible to reach the levels of contrast and depth of blacks offered by OLED and Micro-LED. By associating QLED technology with Mini-LED technology weakness partially corrected.

Micro-LED

The Micro-LED shares many things with OLED. Such as its ability to emit its own light, its infinite blacks, its impressive contrasts and its excellent colorimetry.

By their size Micro-LEDs are distinguished . They are indeed smaller than the OLED. And grouped together to form a single pixel. Another differentiating point, the Micro-LEDs are smaller and allow to produce ever thinner and lighter screens.

Micro-LED technology is  the technology of the future. By the quality of display it offers and its controlled energy consumption, but also by its modularity which makes it possible to display to create all sizes of screens. But its prices reserved for an elite do not currently make it accessible to the general public.

In conclusion LED and QLED screens remain the most accessible.  Mini-LED and OLED panels are currently the best technologies for enjoying exceptional image quality.

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