what are the differences between screen technologies?

OLED, QLED, IPS LCD, VA, Mini-LED, Micro-LED… Difficult to navigate between all types of panels and their characteristics – especially as the manufacturers seem to choose names precisely to confuse the issue! In this file, we therefore suggest that you summarize the differences between the technologies, just to see things more clearly!

Credit: Unsplash

TN, VA, IPS, OLED, LCD, Micro-LED, QLED, Mini-LED… In terms of screen, technologies are very numerous. So it is easy to get lost and not understand the distinctions between the different standards used in the industry. In this file, we will try to help you see more clearly and finally remove the blur on what is really hiding behind all these acronyms.

LCD screens

On a smartphone, an LCD screen is necessarily IPS type. This technology has definitely supplanted TN panels on mobile. But there are many other types of LCD, which we will detail later and which are used for example on PC monitors and televisions.

A few words about LCD in general: LCD stands for “Liquid Crystal Display“, Or liquid crystal display in French. The beginnings of the technology date back to the 1970s, but it was not until the mid-1980s that serious advances were made, in particular with the arrival of color.

Liquid crystal displays exploit the polarization of light for display. That is to say, they play on transparency, but do not directly emit light. That is why they must be equipped with a backlighting device.

The LCD was mainly launched in televisions at the end of the 90s, and success has not wavered since. It must be said that the technology is now well mastered regardless of the size of the slab and the successive improvements do not involve building new production units, which is an asset to reduce costs compared to other technologies.

Also read: what are the best LED, OLED and QLED TVs in 2020?

TN panels

Screens based on Twisted Nematic (TN) technology are the first LCDs to appear on the market and continue to exist to this day. Image quality is not its strong point, with lower color rendering and contrast to what we find on other types of LCD. The viewing angles are also far below average. This is why TN is to be avoided for a television. For a computer monitor, you must make sure that the screen will be at the right height and in the axis before embarking on a purchase. Avoid TN for a setup with several screens.

benq gaming screen
BenQ uses TN panels for low-cost gaming monitors

If TN still exists in 2020, it is because it still offers significant advantages. Its price first: TN screens are among the cheapest on the market. You can acquire 27-inch TN at the same price as a 22-inch VA or IPS. These slabs are also extremely fast for LCD. Even on entry-level models, they can offer very low response times, less than 5 ms. It is also TN screens that allow you to take advantage of a high refresh rate (120, 144 or 240 Hz) at a low rate.

VA tiles

VA technology (for Vertical Alignment) has been the subject of many upgrades since its inception. Therefore, it comes in several versions, some of which are still in use today. In particular, we find MVA (multi-domain vertical alignment) and PVA (Patterned Vertical Alignment) technologies, which have made it possible toimprove the depth of blacks and contrasts compared to what previous VA tiles offered. The best on these two criteria is the PVA, designed by Samsung. In return, it is more often the object of tingling in the image.

curved samsung
This Samsung monitor is equipped with a VA panel

Generally speaking, VA displays are popular because they more easily block the passage of backlight light than other types of LCD panels. This results in the best contrasts and the best black quality on the LCD. But this technology also has its weaknesses. The viewing angles are reduced than IPS, which is why it is not the best solution for a TV, while VA is much more acceptable for a PC monitor. The other drawback is the slowness of these panels (especially MVA), which does not make them a good solution for players looking for performance.

Note that Sharp has introduced a new range of VA panels with UV²A. It offers decent viewing angles (but still not up to IPS), retains the benefits of VA in terms of contrast, and is faster than MVA and PVA. It is the best Vertical Alignment solution of the moment, but it has not yet been democratized on consumer products so far. Sharp believes that it is too expensive to be really profitable and that a consumer who wants to put the price for a screen should instead turn to OLED.

IPS panels

If you’ve heard of any display technology, it might be this one. IPS (In-Plane Switching) has become very popular with manufacturers for its value for money and balanced features. This standard stands out in particular by its very wide viewing angles. For this, the IPS is a very good solution for televisions, which we rarely look directly in front of, either horizontally or vertically. Same observation for smartphones: the IPS allows to have a good image quality even if the mobile is at an angle, placed on the table, or any other situation where it is not directly in front of the eyes.

honor 7x screen test
Most entry and mid-range smartphones have an IPS panel, here the Honor 7X

IPS is also shimmering colors worthy of VA screens. The weak point of technology is in the contrasts, which are not very convincing. Blacks are more dark gray than real black. You may have noticed the difference between blacks displayed by an IPS screen and those displayed by an OLED screen on a TV or smartphone.

IPS screens also benefit from faster than those offered by VA screens. Many of them at low cost can reach 75 Hz. On the other hand, the price tends to skyrocket for consumers looking for IPS with a higher refresh rate (120, 144 or 240 Hz). A 120 Hz IPS screen will therefore very often be more expensive than a 120 Hz TN screen, the first cited combining performance and display quality.

QLED panels

Be careful here, many users tend to get confused. The QLED (Quantum-dot Light Emitting Diode) is used exclusively by Samsung, which has used marketing strategies to force into the minds of users that QLED is “Samsung’s OLED”. In fact, the QLED today works using an LED backlighting technique, like any other LCD screen. It is therefore part of this family of slabs. The OLED, with its pixels that emit their own light, therefore ultimately nothing to do with the QLED.

Also read: Samsung Neo QLED – here is the price of the latest 4K and 8K TVs unveiled at CES 2021

That being said, the QLED remains very interesting, any LCD it is. The promise of this quantum well filter technology: bright and faithful colors, rich detail, high level of contrast and luminance that can potentially reach up to 4000 nits. The QLED is able to display 100% of the color space of the DCI-P3 standard used for digital cinema and allows you to enjoy deeper blacks than with other LCD technologies.

samsung qled
A Samsung QLED TV

QLED also refers to an optimized backlighting technique. QLED TVs actually use a VA panel, which they enhance with quantum well filters. Thus, the refresh rate and viewing angles offered by the QLED are not perfect, even if they are better than on a conventional VA screen. Note, however, that the QLED is distinguished by a lower energy consumption than the average.

Samsung’s talk about its QLED technology is as follows. According to the South Korean manufacturer, QLED has a much better lifespan than OLED, whose organic components are irreparably degraded. An argument difficult to verify for several reasons. First, we still lack perspective on these two relatively recent technologies to properly judge the lifespan they ensure. Then, the OLED evolves and if the first televisions equipped with this technology could suffer from problems in the long term, the manufacturers adapted and integrated functions to overcome this problem.

The second argument made by Samsung is that while OLED offers a fabulous experience in dark environments, it loses interest when there is light, as is often the case in our living rooms. In that case, the luminance of QLEDs takes an advantage. Especially since according to the group’s speech, the OLED rapidly loses its colors and its brightness over time (again, this is less and less true). For Samsung, the interest of OLED is justified mainly for small format screens. It also uses its AMOLED technology on its mid-range and high-end smartphones.

Finally, be aware that the technology behind the QLED is not only exploited by Samsung. The equivalent on the Sony Bravia range is called Triluminos, while LG chose the name NanoCell (or SuperHD LED).

Mini-LED screens

The Mini-LED… looks like QLED technology. There is a quantum well filter, and an extensive local dimming. The name Mini-LED refers to Quantum Dot displays used in Apple products.

miniled
How Mini-LED LCD Technology Works

However, with a size less than a millimeter, Mini-LEDs are much smaller than conventional LEDs. We can thus position more than 15,000 under a 65-inch screen. With such a distribution of LEDs, this LCD technology has nothing to do with conventional solutions. We thus find much more convincing blacks and contrasts, even if we do not reach the level of OLED or Micro-LED in this area, which can completely extinguish the pixels. The brightness is also much stronger. If we do not achieve what the Micro-LED offers, the Mini-LED does better than the OLED in this area, which is the main weakness.

Samsung Neo QLED MiniLED
Samsung Neo QLED (Mini-LED)

The Mini-LED should eventually land on the iPhone, MacBook, Apple Watch and iPad Pro. Other manufacturers must roll out similar technologies, although under different names. There will, for example, be the LG QNED televisions, which are again a variation of Quantum Dot + local dimming technology.

lg qned 8k

Types of LCD backlight

We will only discuss here LED backlighting technologies, which are the only ones still in use today.

There are many techniques for exciting liquid crystals in LCD screens by backlighting, but not all are created equal. The best currently are precisely those exploiting the technology of quantum dot filters (Quantum Dots) detailed in the previous part: QLED, Triluminos, NanoCell.

Panasonic also manages to do well with its technology Wide Color Phosphor. This consists of an optimized LED backlighting with a new color filter system allowing to restore up to 98% of the DCI-P3 color space, thus approaching the 100% coverage offered by QLED.

But all this is just a drop of water very high end of the LCD market. Most televisions do not come with all of these features and rely on older, less expensive mechanisms.

edge direct led

Edge LED LCD backlight

With this technique, the LED diodes are integrated into bars located on the edges of the panel, so there are none under the entire surface of the screen. They are then light reflectors which make it possible to diffuse the light from the LEDs (and therefore the image) over the entire panel. This is not the best solution in terms of quality, but it makes it possible to reduce the thickness of the screens and to have a device that consumes less energy.

LCD Edge LED Backlight with Local Dimming

We use the principle of LED diodes placed only on the edges with the presence of reflectors to diffuse the light, but adding the dynamic LED lighting technology known as “local dimming“. This consists of an artificial intelligence managing the automatic switching on and off of each diode according to the light requirements. This offers a much more convincing rendering of images and deeper blacks than with the classic Edge LED. This combination is quite rare given that the

Direct LED (or Full LED) LCD backlight

Here, the entire back of the slab is covered with diodes. This offers a more homogeneous backlighting than what the Edge LED offers. On models that use the use of three RGB LEDs (red, green and blue), this system also allows for more accurate colorimetry. In return, the presence of all these LEDs generates higher energy consumption and requires a certain thickness of the screen.

Direct LED (or Full LED) LCD backlight with Local Dimming

We find the Direct LED (or Full LED) backlighting technology described above, but with the integration of Local Dimming which we have already mentioned a little above. Often abbreviated as FALD for Full Array Local Dimmming, this is currently the best backlight technology available. The quality of FALD varies greatly depending on the number of independent screen areas: the higher it is, the more satisfactory the result will be.

OLED screens

We hear more and more about it, OLED is popular. It must be said that this technology offers an extremely interesting advantage-disadvantage ratio compared to conventional LCD solutions. Today, only its price hinders its expansion. It is still found in its variant on most high-end smartphones and even on certain mid-range from a few manufacturers, Samsung and Xiaomi in the lead. The variant Super AMOLED is widely used by Samsung for small formats. On TVs, the OLED is reserved for premium devices. For PC monitors or laptop screens, this type of panel is very rarely used. The devices that are equipped with them are very expensive.

samsung pc screen 4k oled
Samsung laptop PC with 4K OLED display, a rarity on the market

OLED stands for “Organic Light-Emitting Diode”. A name that perfectly sums up its main characteristics and how it works. This technology is based on the presence of organic polymers capable of emitting their own light. We are therefore on a totally different process than what we find on the LCD: here, no liquid crystals or backlighting.

The properties of OLED make it possible to design particularly thin and light since these do not need backlit systems or filters to operate. This type of screen is therefore much more practical and can in particular be easily positioned on a wall rather than a TV cabinet. OLED panels are also more flexible, making it easier to create curved, even foldable or rollable screens.

galaxy fold
The Galaxy Fold, Samsung’s foldable OLED smartphone

In terms of pure performance and image quality, this technology does an almost flawless one. The viewing angles being very wide, the display remains very good even when the user is not in front of the screen, where the brightness, the contrast and the colorimetry can be degraded very strongly on LCD screens. Of course, the contrast of the OLED is unmatched, with the display of true blacks that an LCD panel is unable to produce by the very nature of its operation. Shades are also better handled by OLED.

With a response time less than 0.1 ms, OLED displays are also much faster than any LCD display, even TN. We therefore do not find the effects of blur or streaks that we sometimes see when there is movement in the image. Finally, let’s talk about electricity consumption. Without backlight, OLED is less greedy than his colleagues using LCD technology. In addition, the display of a black pixel is energy intensive on LCD, while it is not on OLED since the pixel is off.

lg tv 8k
LG showcased 88-inch 8K OLED TV at IFA 2018

The OLED is able to offer good brightness, often around 800-850 nits. If this luminance level is correct, it is still one of the main weak points of OLED, much less efficient on this point than competing technologies such as QLED, Mini-LED or Micro-LED. The situation is improving all the same with Panasonic which managed to reach 1000 nits by 2020 thanks to the installation of a better cooling system. On the downside, the TV is thicker and heavier than most other OLEDs. And in 2021, LG and Sony are also announcing to exceed the symbolic bar of 1000 nits (peak). For most purposes, such brightness is sufficient, but if a window overlooks the TV directly, discomfort may be felt.

Micro-LED screens

As we explained to you earlier, Samsung is not the number 1 supporter of OLED for devices with long diagonal panels, such as televisions. But its QLED is not the perfect solution either since this technology continues to use backlighting, which has several flaws already described above. The South Korean manufacturer is therefore now betting on Micro-LED for the future.

Unlike the OLED, the Micro-LED is not based on organic components, but electronic (a semiconductor called gallium nitride), guaranteeing a much longer life than that offered by its competitor. Samsung evokes 100,000 hours of operation, approximately 11 years of continuous use. Another advantage of the Micro-LED: foolproof responsiveness with response times of less than 1 ms.

microled
Source: Wikimedia

These screens are made up of thousands of microscopic LEDs that form the pixels. For each pixel, there is a red LED, a green LED and a blue LED, which allows to benefit from a excellent colorimetry. When a pixel should “display” black, it turns off. The Micro-LED thus manages to offer contrasts and deep blacks at the height of what can be seen with OLED.

On the other hand, the promise of brightness of Micro-LED greatly exceeds that of OLED, and even of QLED. Samsung says its first Micro-LED devices hit 4000 nits, but the tech is easily capable to cross the threshold of 10,000 nits. As a reminder, the OLED hardly reaches 1000 nits. The Micro-LED is therefore the assurance of having an excellent image even with the rays of the sun entering the living room and of making the most of image processing technologies such as HDR10 + or Dolby Vision.

In front of all these arguments in its favor, how is it that the Micro-LED does not impose itself more on the market today then? Recent, this technology is still extremely expensive. So much so that we are not yet sure that it will ever be viable for the mainstream market. Miniaturization is always a very expensive process, and the high number of microscopic LEDs (size approx. 30 μm) that are required with this process invariably drive up the price of the final product. At present, Samsung is not even able to launch mass production because the manufacturing process is so complicated.

We are therefore not about to see PC screens or televisions equipped with Micro-LEDs in our homes in the near future. On the other hand, it is possible that this technology will land soon on devices with smaller panels, such as smartphones or connected watches, and not necessarily through Samsung. Case to be continued.

LCD vs OLED vs Micro-LED: which technology is better?

Now that we have reviewed the main types of tiles, we provide a summary in tabular form to identify at a glance the strengths and weaknesses of each technology.

Color rendering Contrast Reactivity Brightness Viewing angles
TN (LCD) Way Way Excellent Way Bad
VA (LCD) Good Good Way Way Good
IPS (LCD) Good Way Way Way Excellent
QLED (LCD) Excellent Good Good Excellent Excellent
OLED Excellent Excellent Excellent Way Excellent
Micro LED Excellent Excellent Excellent Excellent Excellent
Mini-LED (LCD) Excellent Good Excellent Excellent Excellent

As you can see, no technology is perfect. The one that would come closest to it would be the Micro-LED, but mass production is not for now and the prices are prohibitive for the general public.

Of multiple parameters are taken into account when buying a PC monitor, television, or other device with a panel. The technologies described above each have their strengths and weaknesses, so you have to anticipate the consumption that you will have of the device to find the product that best meets your needs while taking into account the constraints of budget. Below, we detail a few things to take into account before purchasing. We focus here on characteristics directly related to the slab, there are of course other elements to take into account depending on the device, such as its size, its design or the connections it carries.

Response time

Manufacturers communicate a lot about this feature, especially for PC screens. They target players in particular by promising them a very low response time. Too often this is a marketing trick. To begin with, many consumers tend to confuse response time with input lag. This last time represents the time required for the television to process and display information. For online gaming, high input lag can be fatal.

lg gaming
Manufacturers and sellers often put forward a low response time in their communication

Response time is how quickly a screen can change a color pixel to display a new image while erasing traces of the previous image. In theory, the response time is measured as follows: it is the time it takes for a pixel to go from white to black and then back to white. In practice, most manufacturers measure a “gray to gray” response time, that is, the time it takes for a pixel to go from one shade of gray to another, in order to communicate a response time. weaker. This is why it is necessary to be wary of the indications on the data sheets in this regard for the LCD screens (the response time in OLED is however always very low).

In all cases, the higher the response time, the more you will tend to notice defects (blur effects and pixel trails) in the image during sudden movements. This happens especially in games with nervous gameplay or when the camera changes suddenly.

Definition

You must pay attention to the image definition offered by the screen of the device you wish to acquire. To judge which definition is right for you, several parameters come into play. The slab size first: the larger it is, the lower the resolution for the same definition. The “thumb race” can therefore be dangerous for image quality.

Then we must also consider the distance that goes under separate from the screen. A television is usually located several meters away from us, but a PC or smartphone screen is much closer to the eyes, and too low a definition can then make it possible to distinguish the pixels and realize that the quality is not amazing. (do the test by moving closer to your television for example).

Also read: definition or screen resolution, what are the differences?

On smartphones, an HD definition (720p) is to be reserved only for small screens, below 5.5 inches. Full HD + is more than enough for any mobile. Of course, we often hold our smartphone close to our eyes, but this amount of pixels for screens of this size is sufficient. The QHD + offers a difference in quality, but we can easily do without it, especially as the mobiles which embed QHD + are always very expensive. 4K is of little interest on a smartphone. Moreover, they are very few to offer it (a few Sony Xperia).

sony xperia 1
The Sony Xperia 1 and its 4K HDR OLED screen

On laptops and computer monitors, the screen diagonal is longer than on mobile. Forget about HD, even on a small 13-inch format. 1080p is a minimum, and it is the definition that is overwhelmingly the majority. QHD or 2K are still relatively expensive on products of this type, but the prices are going down, especially at 60 or 75 Hz. But you will have to switch to benefit from a very good image quality on a screen larger than 27 inches and that you keep a short distance from it. 4K is also increasingly affordable on PC screens, but especially for professionals or artists. The price is skyrocketing if you want a 4K monitor with a high refresh rate, low response time, or FreeSync and G-SYNC compatibility.

It is undoubtedly on the question of the television that the needs vary the most. Whether your sofa is two or four meters from the TV changes absolutely everything, so it is difficult to cover all possible situations to guide you. Just be careful not to fall for the big low-definition TV trap. Ban HD on a 32 ” or larger screen and Full HD on a screen larger than 43 ”. 4K is now relatively affordable in this sector, do not hesitate to invest in a compatible television if you can afford it, where the interest-price ratio of 4K over other types of screens is much more questionable.

Since 2020, the general public can also get 8K televisions. L’investissement peut avoir un vague intérêt si vous comptez conserver votre TV 10 ans ou plus, mais la 8K n’a que peu d’intérêt pour l’instant au vu du peu de contenus compatibles et des capacités limitées des téléviseurs en matière d’upscaling. Vous avez encore beaucoup de temps devant vous pour penser à la 8K.

Les technologies vidéo

Le type de dalle utilisé et la définition ne font pas tout. Si vous êtes intéressé par le top du top et souhaitez bénéficier d’une expérience haut de gamme, vous devez également vous assurer que certaines fonctionnalités améliorant encore le rendu de l’image soient présentes.

Le HDR (High Dynamic Range) est une technologie d’imagerie à grande gamme dynamique. Le support du HDR garantit au consommateur une qualité en termes de colorimétrie, de luminosité, de contraste, et donc de niveau de détails dans l’image. Il existe de nombreuses normes HDR, l’une des plus connues étant le HDR10, qu’on retrouve même sur certains écrans de smartphones haut de gamme. Le HDR10 + va encore plus loin en apportant une notion de dynamisme. C’est-à-dire que le téléviseur va calculer les meilleurs réglages pour l’affichage de chaque image, là où le HDR10 standard est statique : les paramètres pour un même contenu vidéo sont les identiques du début à la fin.

Vous avez sans doute également entendu parler de Dolby Vision, sans vraiment savoir ce à quoi cela se réfère. Cette technologie a les mêmes mérites que le HDR (boost de la qualité générale de l’image en jouant sur les couleurs, le contraste et la luminosité), mais va encore plus loin. Le Dolby Vision peut par exemple en théorie exploiter au mieux une luminance de 10 000 nits (il n’existe pour le moment aucun produit grand public avec offrant une telle luminosité). Avec son encodage 12-bit (contre 10-bit pour le HDR10), ce standard offre une qualité d’image supérieure au HDR, notamment avec une colorimétrie encore plus avancée. Si le HDR est de plus en plus répandu, le Dolby Vision reste une fonctionnalité réservée aux appareils premium.

Notez que chaque service de streaming vidéo à la demande développe ou non le support de ces technologies. Par exemple, Netflix est focalisé sur le Dolby Vision et ne propose pas de HDR10+, seulement du HDR10. Amazon Prime Video est quant à lui compatible HDR10+ et même HDR10+ Adaptative, l’équivalent du Dolby Vision IQ. Ces deux dernières permettent, en plus de profiter d’une optimisation dynamique des images scène par scène, d’adapter également l’image automatiquement en fonction des conditions de luminosité de la pièce. Choisissez aussi votre téléviseur en fonction de la provenance des contenus vidéo que vous visionnez, donc.

Lupin Netflix
Lupin sur Netflix, disponible en Dolby Vision, HDR10, mais pas HDR10+

La fréquence de rafraîchissement

Vous pouvez aussi retrouver cet élément sous la dénomination “Taux de rafraîchissement“. Celui-ci est mesuré en Hz, indiquant le nombre de fois auquel l’image est recalculée par seconde. Plus la valeur est élevée, plus l’écran sera fluide et agréable à l’œil. Les constructeurs le mettent généralement bien en avant pour attirer les joueurs, une haute fréquence de rafraîchissement prenant tout son sens avec les jeux vidéo. Mais elle se ressent également pour bien d’autres tâches, même une simple navigation web. Le défillement est notamment bien plus doux. Attention, ce n’est pas parce qu’un écran offre une fréquence de rafraîchissement élevée que vous allez forcément en profiter en jeu. Il faut pour cela que les jeux soient bien optimisés et que votre ordinateur ou console soient suffisamment puissants.

Le taux de rafraîchissement de base standard pour un écran est généralement de 60 Hz. Cela peut descendre à 50 Hz sur un téléviseur.

Sur smartphone, les écrans à fréquence de rafraîchissement supérieure à 60 Hz n’existaient pas avant 2019. Leur démocratisation est donc très récente et pour l’heure, seuls les modèles orientés haut de gamme en profitent. Les fabricants proposent soit du 90 Hz soit du 120 Hz (à l’heure à laquelle ces lignes sont écrites, seul le Nubia Red Magic 5G offre une dalle 144 Hz). Gardez bien à l’esprit qu’un écran 90 Hz ou 120 Hz consomme plus d’énergie qu’un écran 60 Hz, une telle fonctionnalité a donc des répercussions sur l’autonomie du mobile (elle peut être désactivée pour repasser à 60 Hz et ainsi économiser de la batterie.) Notons aussi que les jeux disponibles sur smartphone ne sont généralement pas optimisés pour profiter au mieux d’un rafraîchissement si rapide, si bien que les effets ne sont pas toujours aussi époustouflants qu’on ne pourrait le penser. Mais même pour scroller, changer d’écran ou pour les animations, on note une meilleure fluidité à 90 Hz et 120 Hz.

nubia redmagic 5g
Avec son écran 144 Hz, le Nubia Red Magic 5G offre la meilleure fréquence de rafraîchissement sur smartphone

Sur les moniteurs PC, la course aux hertz a commencé depuis bien longtemps déjà. Comme expliqué plus haut, les dalles TN atteignent facilement les 75 Hz, alors que les dalles IPS ou VA sont plutôt à 60 Hz de base sur le premier prix. Ensuite, chacune de ces technologies peut atteindre une fréquence de rafraîchissement très haute, mais cela coûtera moins cher sur TN. Les moniteurs dits “gamers” proposent généralement 120, 144 ou 240 Hz, cette dernière étant encore assez chère et peu répandue.

Sachez que Nvidia et AMD, les deux leaders sur le marché des puces graphiques, ont mis au point des solutions afin d’améliorer la qualité de l’image, notamment en jeu : G-SYNC pour le premier cité et FreeSync pour le second. Leur mission est de synchroniser l’affichage du contenu (les images par seconde, ou fps) avec les capacités de l’écran (fréquence de rafraîchissement) dans le but de réduire les problèmes de ralentissement ou de saccade des images. La présence de l’une ou l’autre de ces technologies est indispensable pour un moniteur gaming digne de ce nom.

amd freesync
Il existe plusieurs normes de FreeSync

Pour les téléviseurs, augmenter la fréquence de rafraîchissement pour aller au-delà du classique 50/60 Hz coûte bien plus cher que sur un moniteur pour ordinateur. On trouve des modèles à 100/120 Hz, mais on tape clairement sur du haut de gamme ici. Pour le gaming, très peu de modèles disposaient de port HDMI 2.1 indispensable pour jouer en 120 images par seconde sur sa console en 2020, ils sont plus nombreux en 2021. Mais là encore, il faut mettre le prix. Les arrivées de la PS5 et de la Xbox Series X, toutes deux compatibles 4K 120 fps sur le papier, devrait booster la disponibilité de TV 120 Hz avec HDMI 2.1. Ce dernier est aussi un moyen d’accéder à des fonctionnalités jeu vidéo avancées, comme le Variable Refresh Rate (VRR) pour limiter la distorsion et améliorer la netteté de l’image ou l’Auto Low Latency Mode (ALLM), qui permet de réduire l’input lag.

Dalle mate ou brillante ?

Un élément souvent oublié, mais qui doit être pris en compte. Les écrans mats ont l’avantage de moins souffrir des reflets et de réduire la fatigue oculaire des utilisateurs. Ils sont donc à privilégier pour de la bureautique, ou même pour les joueurs qui passent beaucoup de temps devant l’écran et qui ne donnent pas une grande importance à la qualité visuelle.

Les écrans brillants proposent quant à eux une meilleure luminosité ainsi que des couleurs plus vives. Pour regarder des contenus vidéo ou le jeu vidéo, la qualité de l’image est donc supérieure à celle des dalles mates. La différence est d’autant plus visible que l’environnement dans lequel se trouve l’écran est lumineux.

Plat ou incurvé ?

Les constructeurs proposent de plus en plus de dalles courbées sur leurs appareils. De quoi renforcer l’immersion en donnant un peu plus la sensation de se trouver au cœur de l’action. Elles sont surtout utiles pour le jeu vidéo, d’où le fait que la plupart d’entre elles sont intégrées dans des moniteurs estampillés gaming. Les écrans incurvés sont par contre plus chers que des équivalents plats.

samsung incurvé
Un écran Samsung incurvé

Dans le cas de moniteurs pour ordinateur, il vaut parfois mieux se tourner vers des dalles plates pour constituer un setup à plusieurs écrans, mais des dalles incurvées peuvent s’envisager en fonction de la configuration que vous désirez donner à votre bureau.

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