pls tft display vs ips free sample

If you want to buy a new monitor, you might wonder what kind of display technologies I should choose. In today’s market, there are two main types of computer monitors: TFT LCD monitors & IPS monitors.

The word TFT means Thin Film Transistor. It is the technology that is used in LCD displays.  We have additional resources if you would like to learn more about what is a TFT Display. This type of LCDs is also categorically referred to as an active-matrix LCD.

These LCDs can hold back some pixels while using other pixels so the LCD screen will be using a very minimum amount of energy to function (to modify the liquid crystal molecules between two electrodes). TFT LCDs have capacitors and transistors. These two elements play a key part in ensuring that the TFT display monitor functions by using a very small amount of energy while still generating vibrant, consistent images.

Industry nomenclature: TFT LCD panels or TFT screens can also be referred to as TN (Twisted Nematic) Type TFT displays or TN panels, or TN screen technology.

IPS (in-plane-switching) technology is like an improvement on the traditional TFT LCD display module in the sense that it has the same basic structure, but has more enhanced features and more widespread usability.

Both TFT display and IPS display are active-matrix displays, neither can’t emit light on their own like OLED displays and have to be used with a back-light of white bright light to generate the picture. Newer panels utilize LED backlight (light-emitting diodes) to generate their light hence utilizing less power and requiring less depth by design. Neither TFT display nor IPS display can produce color, there is a layer of RGB (red, green, blue) color filter in each LCD pixels to produce the color consumers see. If you use a magnifier to inspect your monitor, you will see RGB color in each pixel. With an on/off switch and different level of brightness RGB, we can get many colors.

Winner. IPS TFT screens have around 0.3 milliseconds response time while TN TFT screens responds around 10 milliseconds which makes the latter unsuitable for gaming

Winner. the images that IPS displays create are much more pristine and original than that of the TFT screen. IPS displays do this by making the pixels function in a parallel way. Because of such placing, the pixels can reflect light in a better way, and because of that, you get a better image within the display.

As the display screen made with IPS technology is mostly wide-set, it ensures that the aspect ratio of the screen would be wider. This ensures better visibility and a more realistic viewing experience with a stable effect.

Winner. While the TFT LCD has around 15% more power consumption vs IPS LCD, IPS has a lower transmittance which forces IPS displays to consume more power via backlights. TFT LCD helps battery life.

Normally, high-end products, such as Apple Mac computer monitors and Samsung mobile phones, generally use IPS panels. Some high-end TV and mobile phones even use AMOLED (Active Matrix Organic Light Emitting Diodes) displays. This cutting edge technology provides even better color reproduction, clear image quality, better color gamut, less power consumption when compared to LCD technology.

This kind of touch technology was first introduced by Steve Jobs in the first-generation iPhone. Of course, a TFT LCD display can always meet the basic needs at the most efficient price. An IPS display can make your monitor standing out.

When it comes to choosing the right panel type of your LCD monitor, the options are seemingly endless. We’ve discussed the differences between AMOLED and LCD displays as well as the different types of touchscreen monitors that are commonly used for various devices and their benefits. Now it’s time to learn about the different features and specifications of PLS and IPS panels so you can decide which one is the most suitable choice for your specific personal or professional applications.

PLS stands for plane to line switching. Also referred to as Super PLS Panel, this technology boasts superior technological advancements such as a multitude of brightness setting options, crystal-clear image quality, and adjustable viewing angles without breaking the bank.

IPS stands for in-plane switching. It’s one of the most commonly used monitors for LCD displays and it consists of two glass panels that hold a layer of liquid crystals in between them. The liquid crystals become animated and perform predetermined actions such as moving in a specific direction or displaying certain colours when they’re charged with an electric current. These actions result in the high-quality images that appear on your television, laptop, or smartphone screen.

As mentioned, IPS LCD monitors contain hundreds of liquid crystals that are situated between two glass sheets in a parallel formation. As electric currents run through the liquid crystals when the screen is turned on, they become animated and move in different directions and backlighting passes through them. This is what produces the crystal-clear and instantaneous images you see on the screen. The excellent viewing angles are the result of the horizontal movements of the liquid crystals inside the panel.

PLS panels for LCD monitors have been on the market for over a decade and have proven to be a worthy adversary for their IPS predecessors. Although the technology is the same for the most part, IPS does offer some minor improvements. The main difference is that IPS panels offer more optimized liquid molecular alignment, which makes for a slightly better viewing experience. Hence, PLS screens offer 15% more brightness than IPS panel types.

From an aesthetic and logistical standpoint, PLS panel types are also thinner than IPS due to the fact that the glass sheets that hold the liquid crystals in place are positioned much lower in the screen configuration.

When it comes to comparing and contrasting the differences between IPS and PLS LCD monitor panel types, the competition is pretty stiff. Both monitors are fairly similar with the exception that PLS is meant to be an improvement on the previous technology. Here are the key factors that should be considered when deciding which one is the best monitor panel for LCD industrial displays.

PLS monitors offer superior viewing angles when compared to IPS displays. Unlike IPS displays, PLS monitors don’t have any noticeable colour distortions and they have significantly lower production costs.

Colour contrast and brightness is a central concern when purchasing a new commercial or industrial display. Whether you’re a gamer or graphic designer, your best option in this regard is to stick to IPS displays. They offer far more consistent image quality, colour contrast, and brightness that’s perfect for applications that rely heavily on high-quality image production.

Unfortunately, PLS and IPS monitors both have a fairly slow response time (the amount of time it takes for liquid crystals to shift from one colour or shade to another). For this reason, neither one is the ideal choice for gaming purposes, but they’re both suitable for graphic design projects that focus more on colour distribution and accuracy than response time.

PLS panel types have been proven to have superior colour distribution and accuracy compared to IPS panel types. PLS displays have a far more expansive colour gamut that’s ideal for users who require the most natural-looking images and colour options.

Backlight bleed occurs when the lights from the back of the screen leak through the edges, which results in uneven lighting or glow. This is a fairly common shortcoming of IPS screens when the brightness is adjusted to a particularly high level and can make for a poor viewing experience. PLS panel types don’t have this problem and offer even lighting regardless of the brightness settings.

The answer is inconclusive. Both IPS and PLS monitor types certainly have their advantages. Although PLS is slightly better in terms of backlighting and faster response times, the margins for improvement are fairly tight. It really just depends on what your preferences are as well as the applications that the monitors are being used for.

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Before you get a new monition for your organization, comparing the TFT display vs IPS display is something that you should do. You would want to buy the monitor which is the most advanced in technology. Therefore, understanding which technology is good for your organization is a must. click to view the 7 Best Types Of Display Screens Technology.

That is why it is important to break it down and discuss point by point so that you can understand it in a layman’s language devoid of any technical jargon. Therefore, in this very article, let’s discuss what exactly TFT LCDs and IPS LCDs are, and what are their differences? You will also find out about their pros and cons for your organization.

The word TFT means Thin-Film-Translator. It is the technology that is used in LCD or Liquid Crystal Display. Here you should know that this type of LCD is also categorically referred to as active-matrix LCDs. It tells that these LCDs can hold back some pixels while using other pixels. So, the LCD will be using a very minimum amount of energy to function. TFT LCDs have capacitors and transistors. These are the two elements that play a key part in ensuring that the display monitor functions by using a very small amount of energy without running out of operation.

Now, it is time to take a look at its features that are tailored to improve the experience of the monitor users significantly. Here are some of the features of the TFT monitor;

The display range covers the application range of all displays from 1 inch to 40 inches as well as the large projection plane and is a full-size display terminal.

Display quality from the simplest monochrome character graphics to high resolution, high color fidelity, high brightness, high contrast, the high response speed of a variety of specifications of the video display models.

No radiation, no scintillation, no harm to the user’s health. In particular, the emergence of TFT LCD electronic books and periodicals will bring humans into the era of a paperless office and paperless printing, triggering a revolution in the civilized way of human learning, dissemination, and recording.

It can be normally used in the temperature range from -20℃ to +50℃, and the temperature-hardened TFT LCD can operate at low temperatures up to -80 ℃. It can not only be used as a mobile terminal display, or desktop terminal display but also can be used as a large screen projection TV, which is a full-size video display terminal with excellent performance.

The manufacturing technology has a high degree of automation and good characteristics of large-scale industrial production. TFT LCD industry technology is mature, a mass production rate of more than 90%.

TFT LCD screen from the beginning of the use of flat glass plate, its display effect is flat right angles, let a person have a refreshing feeling. And LCDs are easier to achieve high resolution on small screens.

The word IPS refers to In-Plane-Switching which is a technology used to improve the viewing experience of the usual TFT displays. You can say that the IPS display is a more advanced version of the traditional TFT LCD module. However, the features of IPS displays are much more advanced and their applications are very much widespread. You should also know that the basic structure of the IPS LCD is the same as TFT LCD if you compare TFT LCD vs IPS.

As you already know, TFT displays do have a very quick response time which is a plus point for it. But, that does not mean IPS displays a lack of response time. In fact, the response time of an IPS LCD is much more consistent, stable, and quick than the TFT display that everyone used to use in the past. However, you will not be able to gauge the difference apparently by watching TFT and IPS displays separately. But, once you watch the screen side-by-side, the difference will become quite clear to you.

The main drawback of the TFT displays as figured above is the narrow-angle viewing experience. The monitor you buy for your organization should give you an experience of wide-angle viewing. It is very much true if you have to use the screen by staying in motion.

So, as IPS displays are an improved version of TFT displays the viewing angle of IPS LCDs is very much wide. It is a plus point in favor of IPS LCDs when you compare TFT vs IPS. With a TFT screen, you cannot watch an image from various angles without encountering halo effects, blurriness, or grayscale that will cause problems for your viewing.

It is one of the major and remarkable differences between IPS and TFT displays. So, if you don’t want to comprise on the viewing angles and want to have the best experience of viewing the screen from wide angles, the IPS display is what you want. The main reason for such a versatile and wonderful viewing angle of IPS display is the screen configuration which is widely set.

Now, when you want to achieve wide-angle viewing with your display screen, you need to make sure it has a faster level of frequency transmittance. It is where IPS displays overtake TFT displays easily in the comparison because the IPS displays have a much faster and speedier transmittance of frequencies than the TFT displays.

Now the transmittance difference between TFT displays and IPS displays would be around 1ms vs. 25ms. Now, you might think that the difference in milliseconds should not create much of a difference as far as the viewing experience is concerned. Yes, this difference cannot be gauged with a naked eye and you will find it difficult to decipher the difference.

However, when you view and an IPS display from a side-by-side angle and a TFT display from a similar angle, the difference will be quite evident in front of you. That is why those who want to avoid lagging in the screen during information sharing at a high speed; generally go for IPS displays. So, if you are someone who is looking to perform advanced applications on the monitor and want to have a wider viewing angle, then an IPS display is the perfect choice for you.

As you know, the basic structure of the IPS display and TFT displays are the same. So, it is quite obvious that an IPS display would use the same basic colors to create various shades with the pixels. However, there is a big difference with the way a TFT display would produce the colors and shade to an IPS display.

The major difference is in the way pixels get placed and the way they operate with electrodes. If you take the perspective of the TFT display, its pixels function perpendicularly once the pixels get activated with the help of the electrodes. It does help in creating sharp images.

But the images that IPS displays create are much more pristine and original than that of the TFT screen. IPS displays do this by making the pixels function in a parallel way. Because of such placing, the pixels can reflect light in a better way, and because of that, you get a better image within the display.

As the display screen made with IPS technology is mostly wide-set, it ensures that the aspect ratio of the screen would be wider. This ensures better visibility and a more realistic viewing experience with a stable effect.

As you already know the features of both TFT and IPS displays, it would be easier for you to understand the difference between the two screen-types. Now, let’s divide the matters into three sections and try to understand the basic differences so that you understand the two technologies in a compressive way. So, here are the difference between an IPS display and a TFT display;

Now, before starting the comparison, it is quite fair to say that both IPS and TFT displays have a wonderful and clear color display. You just cannot say that any of these two displays lag significantly when it comes to color clarity.

However, when it comes to choosing the better display on the parameter of clarity of color, then it has to be the IPS display. The reason why IPS displays tend to have better clarity of color than TFT displays is a better crystal oriental arrangement which is an important part.

That is why when you compare the IPS LCD with TFT LCD for the clarity of color, IPS LCD will get the nod because of the better and advanced technology and structure.

IPS displays have a wider aspect ratio because of the wide-set configuration. That is why it will give you a better wide-angle view when it comes to comparison between IPS and TFT displays. After a certain angle, with a TFT display, the colors will start to get a bit distorted.

But, this distortion of color is very much limited in an IPS display and you may see it very seldom after a much wider angle than the TFT displays. That is why for wide-angle viewing, TFT displays will be more preferable.

When you are comparing TFT LCD vs. IPS, energy consumption also becomes an important part of that comparison. Now, IPS technology is a much advanced technology than TFT technology. So, it is quite obvious that IPS takes a bit more energy to function than TFT.

Also, when you are using an IPS monitor, the screen will be much larger. So, as there is a need for much more energy for the IPS display to function, the battery of the device will drain faster. Furthermore, IPS panels cost way more than TFT display panels.

1. The best thing about TFT technology is it uses much less energy to function when it is used from a bigger screen. It ensures that the cost of electricity is reduced which is a wonderful plus point.

2. When it comes to visibility, the TFT technology enhances your experience wonderfully. It creates sharp images that will have no problems for older and tired eyes.

1. One of the major problems of TFT technology is that it fails to create a wider angle of view. As a result, after a certain angle, the images in a TFT screen will distort marring the overall experience of the user.

Although IPS screen technology is very good, it is still a technology based on TFT, the essence of the TFT screen. Whatever the strength of the IPS, it is a TFT-based derivative.

Finally, as you now have a proper understanding of the TFT displays vs IPS displays, it is now easier for you when it comes to choose one for your organization. Technology is advancing at a rapid pace. You should not be surprised if you see more advanced display screens in the near future. However, so far, TFT vs IPS are the two technologies that are marching ahead when it comes to making display screens.

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IPS (in-plane switching) is a screen technology for liquid-crystal displays (LCDs). In IPS, a layer of liquid crystals is sandwiched between two glass surfaces. The liquid crystal molecules are aligned parallel to those surfaces in predetermined directions (in-plane). The molecules are reoriented by an applied electric field, whilst remaining essentially parallel to the surfaces to produce an image. It was designed to solve the strong viewing angle dependence and low-quality color reproduction of the twisted nematic field effect (TN) matrix LCDs prevalent in the late 1980s.

The TN method was the only viable technology for active matrix TFT LCDs in the late 1980s and early 1990s. Early panels showed grayscale inversion from up to down,Vertical Alignment (VA)—that could resolve these weaknesses and were applied to large computer monitor panels.

Shortly thereafter, Hitachi of Japan filed patents to improve this technology. A leader in this field was Katsumi Kondo, who worked at the Hitachi Research Center.thin-film transistor array as a matrix and to avoid undesirable stray fields in between pixels.Super IPS). NEC and Hitachi became early manufacturers of active-matrix addressed LCDs based on the IPS technology. This is a milestone for implementing large-screen LCDs having acceptable visual performance for flat-panel computer monitors and television screens. In 1996, Samsung developed the optical patterning technique that enables multi-domain LCD. Multi-domain and in-plane switching subsequently remain the dominant LCD designs through 2006.

IPS technology is widely used in panels for TVs, tablet computers, and smartphones. In particular, most IBM products was marketed as CCFL backlighting, and all Apple Inc. products marketed with the label backlighting since 2010.

Most panels also support true 8-bit-per-channel colour. These improvements came at the cost of a lower response time, initially about 50 ms. IPS panels were also extremely expensive.

IPS has since been superseded by S-IPS (Super-IPS, Hitachi Ltd. in 1998), which has all the benefits of IPS technology with the addition of improved pixel refresh timing.

Unlike TN LCDs, IPS panels do not lighten or show tailing when touched. This is important for touch-screen devices, such as smartphones and tablet computers.

Toward the end of 2010 Samsung Electronics introduced Super PLS (Plane-to-Line Switching) with the intent of providing an alternative to the popular IPS technology which is primarily manufactured by LG Display. It is an "IPS-type" panel technology, and is very similar in performance features, specs and characteristics to LG Display"s offering. Samsung adopted PLS panels instead of AMOLED panels, because in the past AMOLED panels had difficulties in realizing full HD resolution on mobile devices. PLS technology was Samsung"s wide-viewing angle LCD technology, similar to LG Display"s IPS technology.

In 2012 AU Optronics began investment in their own IPS-type technology, dubbed AHVA. This should not be confused with their long standing AMVA technology (which is a VA-type technology). Performance and specs remained very similar to LG Display"s IPS and Samsung"s PLS offerings. The first 144 Hz compatible IPS-type panels were produced in late 2014 (used first in early 2015) by AUO, beating Samsung and LG Display to providing high refresh rate IPS-type panels.

Cross, Jason (18 March 2012). "Digital Displays Explained". TechHive. PC World. p. 4. Archived from the original on 2 April 2015. Retrieved 19 March 2015.

"TFT Technology: Enhancing the viewing angle". Riverdi (TFT Module Manufacturer). Archived from the original on 23 April 2016. Retrieved 5 November 2016. However, [twisted nematic] suffers from the phenomenon called gray scale inversion. This means that the display has one viewing side in which the image colors suddenly change after exceeding the specified viewing angle. (see image Inversion Effect) External link in |quote= (help)

tech2 News Staff (19 May 2011). "LG Announces Super High Resolution AH-IPS Displays". Firstpost.com. Archived from the original on 11 December 2015. Retrieved 10 December 2015.

Baker, Simon (30 April 2011). "Panel Technologies: TN Film, MVA, PVA and IPS Explained". Tftcentral.co.uk. Archived from the original on 29 June 2017. Retrieved 13 January 2012.

Ivankov, Alex (1 September 2016). "Advantages and disadvantages of IPS screen technology". Version Daily. Archived from the original on 26 September 2017. Retrieved 25 September 2017.

"Samsung PLS improves on IPS displays like iPad"s, costs less". electronista.com. Archived from the original on 27 October 2012. Retrieved 30 October 2012.

One of the most important aspects of any display you can understand is the panel technology being used. Specifications alone won’t give you the full picture of a displays performance, and we all know that manufacturers can exaggerate specs on paper to suit their marketing. With an understanding of the panel technology being used you will get a feel for the overall performance characteristics of the display and how it should perform in real terms. Our extensive panel search database helps you identify the panel technology (and manufacturer and part number where known) of many screens in the market. This article which follows will help you understand what the different panel technologies can offer you. A lot of manufacturers now list the panel technology as well in their specs, something which wasn’t included a in the past.

TN Film panels are the mostly widely used in the desktop display market and have been for many years since LCD monitors became mainstream. Smaller sized screens (15″, 17″ and 19″) are almost exclusively limited to this technology in fact and it has also extended into larger screen sizes over the last 7 years or so, now being a popular choice in the 20 – 28″ bracket as well. The TN Film panels are made by many different manufacturers, with the big names all having a share in the market (Samsung, LG.Display, AU Optronics) and being backed up by the other companies including most notably Innolux and Chunghwa Picture Tubes (CPT). You may see different generations of TN Film being discussed, but over the years the performance characteristics have remained similar overall.

TN Film has always been so widely used because it is comparatively cheap to produce panels based on this technology. As such, manufacturers have been able to keep costs of their displays down by using these panels. This is also the primary reason for the technology to be introduced into the larger screen sizes, where the production costs allow manufacturers to drive down retail costs for their screens and compete for new end-users.

The other main reason for using TN Film is that it is fundamentally a responsive technology in terms of pixel latency, something which has always been a key consideration for LCD buyers. It has long been the choice for gaming screens and response times have long been, and still are today, the lowest out of all the technologies overall. Response times typically reach a limit of around 5ms at the ISO quoted black > white > black transition, and as low as 1ms across grey to grey transitions where Response Time Compensation (overdrive) is used. TN Film has also been incorporated into true 120Hz+ refresh rate desktop displays, pairing low response times with high refresh rates for even better moving picture and gaming experiences, improved frame rates and adding 3D stereoscopic content support. Modern 120Hz+ refresh rate screens normally also support NVIDIA 3D Vision 2 and their LightBoost system which brings about another advantage for gaming. You can use the LightBoost strobed backlight system in 2D gaming to greatly reduce the perceived motion blur which is a significant benefit. Some screens even include a native blur reduction mode instead of having to rely on LightBoost ‘hacks’, providing better support for strobing backlights and improving gaming experiences when it comes to perceived motion blur. As a result, TN Film is still the choice for gamer screens because of the low response times and 120Hz+ refresh rate support.

Movie playback is often hampered by ‘noise’ and artifacts, especially where overdrive is used. Black depth was traditionally quite poor on TN Film matrices due to the crystal alignment, however, in recent years, black depth has improved somewhat and is generally very good on modern screens, often surpassing IPS based screens and able to commonly reach contrast ratios of ~1000:1. TN Film is normally only a true 6-bit colour panel technology, but is able to offer a 16.7 million colour depth thanks to dithering and Frame Rate Control methods (6-bit + FRC). Some true 8-bit panels have become available in recent years (2014 onwards) but given the decent implementation of FRC on other 6-bit+FRC panels, the real-life difference is not something to concern yourself with too much.

Most TN Film panels are produced with a 1920 x 1080 resolution, although some larger sizes have become available with higher resolutions. A new generation of Quad HD 2560 x 1440 27″ TN Film panels emerged in 2014. We’ve also seen the introduction of 28″ Ultra HD 3840 x 2160 resolution TN Film panels become available, and adopted in many of the lower cost “4k” models in the market. Where used, the Anti-Glare (AG) coating used on most TN Film panels is moderately grainy – not as grainy as some older IPS panel coatings, but not as light as modern IPS, VA or equivalents. Also at the time of writing there are no ultra-wide (21:9 aspect ratio) or curved format TN Film panels in production.

MVA technology, was later developed by Fujitsu in 1998 as a compromise between TN Film and IPS technologies. On the one hand, MVA provided a full response time of 25 milliseconds (that was impossible at the time with IPS, and not easily achievable with TN), and on the other hand, MVA matrices had wide viewing angles of 160 – 170 degrees, and thus could better compete with IPS in that parameter. The viewing angles were also good in the vertical field (an area where TN panels suffer a great deal) as well as the horizontal field. MVA technology also provided high contrast ratios and good black depth, which IPS and TN Film couldn’t quite meet at the time.

In MVA panels, the crystals in the domains are oriented differently, so if one domain lets light pass through, the neighboring domain will have the crystals at an angle and will shutter the light (of course, save for the display of white color, in which case all the crystals are placed almost in parallel to the matrix plane).

While some improvements have been made, the color-reproduction properties of these modern MVA technologies can still be problematic in some situations. Such panels give you vivid and bright colors, but due to the peculiarities of the domain technology many subtle color tones (dark tones often) are lost when you are looking at the screen strictly perpendicularly. When you deflect your line of sight just a little, the colors are all there again. This is a characteristic “VA panel contrast shift” (sometimes referred to as ‘black crush’ due to the loss of detail in dark colours) and some users pick up on this and might find it distracting. Thus, MVA matrices are somewhere between IPS and TN technologies as concerns color rendering and viewing angles. On the one hand, they are better than TN matrices in this respect, but on the other hand the above-described shortcoming prevents them from challenging IPS matrices, especially for colour critical work.

Traditionally MVA panels offered 8-Bit colour depth (a true 16.7 million colours) which is still common place today. We have yet to see any new breed of 10-bit capable MVA panel even using Frame Rate Control (8-bit + FRC). Black depth is a strong point of these P-MVA /S-MVA panels, being able to produce good static contrast ratios as a result of around 1000 – 1200:1 in practice. Certainly surpassing IPS matrices of the time as well as most TN Film panels. This has improved since with more recent AMVA panels to 3000 – 5000:1 (see next section).

MVA panels also offer some comparatively good movie playback with noise and artifacts quite low compared with other technologies. The application of overdrive doesn’t help in this area, but MVA panels are pretty much the only ones which haven’t suffered greatly in movie playback as a result. Many of the MVA panels are still pretty good in this area, sadly something which overdriven TN Film, IPS and PVA panels can’t offer. While CMO are still manufacturing some S-MVA matrices, AU Optronics no longer produce P-MVA panels and instead produce their newer generation of MVA, called AMVA (see below).

AU Optronics have more recently (around 2005) been working on their latest generation of MVA panel technology, termed ‘Advanced Multi Domain Vertical Alignment’ (AMVA). This is still produced today although a lot of their focus has moved to the similarly named, and not to be confused AHVA (Advanced Hyper Viewing Angle, IPS-type) technology. Compared with older MVA generations, AMVA is designed to offer improved performance including reduced colour washout, and the aim to conquer the significant problem of colour distortion with traditional wide viewing angle technology. This technology creates more domains than conventional multi-domain vertical alignment (MVA) LCD’s and reduces the variation of transmittance in oblique angles. It helps improve colour washout and provides better image quality in oblique angles than conventional VA LCD’s. Also, it has been widely recognized worldwide that AMVA technology is one of the few ways to provide optimized image quality through multiple domains.

AMVA provides an extra-high contrast ratio of greater than 1200:1, reaching 5000:1 in manufacturer specs at the time of writing for desktop monitor panels by optimized colour-resist implementation and a new pixel design and combining the panels with W-LED backlighting units. In practice the contrast ratio is typically nearer to 3000:1 from what we’ve seen, but still far beyond IPS and TN Film matrices. The result is a more comfortable viewing experience for the consumer, even on dimmer images. This is one of the main improvements with modern AMVA panels certainly, and remains way above what competing panel technologies can offer.

AMVA still has some limitations however in practice, still suffering from the off-centre contrast shift you see from VA matrices. Viewing angles are therefore not as wide as IPS technology and the technology is often dismissed for colour critical work as a result. As well as this off-centre contrast shift, the wide viewing angles often show more colour and contrast shift than competing IPS-type panels, although some recent AMVA panel generations have shown improvements here (see BenQ GW2760HS for instance with new “Color Shift-free” technology). Responsiveness is better than older MVA offerings certainly, but remains behind TN Film and IPS/PLS in practice. The Anti-Glare (AG) coating used on most panels is light, and sometimes even appears “semi glossy” and so does not produce a grainy image.

We have included this technology in this section as it is a modern technology still produced by Sharp as opposed to the older generations of MVA discussed above. Sharp are not a major panel manufacturer in the desktop space, but during 2013 began to invest in new and interesting panels using their MVA technology. Of note is their 23.5″ sized MVA panel which was used in the Eizo Foris FG2421 display. This is the first MVA panel to offer a native 120Hz refresh rate, making it an attractive option for gamers. Response times had been boosted significantly on the most part, bringing this MVA technology in line with modern IPS-type panels when it comes to pixel latency. The 120Hz support finally allowed for improved frame rates and motion smoothness from VA technology, helping to rival the wide range of 120Hz+ TN Film panels on the market.

Of particular note also are the excellent contrast ratios of this technology, reaching up to an excellent 5000:1 in practice, not just on paper. Viewing angles are certainly better than TN Film and so overall these MVA panels can offer an attractive all-round option for gaming, without some of the draw-backs of the TN Film panels. Viewing angles are not as wide as IPS panel types and there is still some noticeable gamma shift at wider angles, and the characteristic VA off-centre contrast shift still exists.

The liquid crystals in a PVA matrix have the same structure as in a MVA matrix – domains with varying orientation of the crystals allow keeping the same color, almost irrespective of the user’s line of sight and viewing angle. Viewing angles are not perfect though, as like with MVA matrices when you are looking straight at the screen, the matrix “loses” some shades, which return after you deflect your line of sight from the perpendicular a little. This ‘off-centre’ contrast shift, or ‘black crush’ as it is sometimes called is the reason why some colour enthusiasts prefer IPS-type displays. The overall viewing angles are also not as wide as IPS-type panels, showing more obvious colour and contrast shifts as you change your line or sight.

There was the same problem with traditional PVA matrices as with MVA offerings – their response time grew considerably when there’s a smaller difference between the initial and final states of the pixel. Again, PVA panels were not nearly as responsive as TN Film panels. With the introduction of MagicSpeed (Samsung’s overdrive / RTC) with later generations (see below), response times have been greatly improved and are comparable to MVA panels in this regard on similarly spec-ed panels. They still remain behind TN Film panels in gaming use, but the overdrive really has helped improve in this area. There are no PVA panels supporting native 120Hz+ refresh rates and Samsung have no plans to produce any at this time. In fact Samsung’s investment in PVA seems to have been cut back significantly in favour of their IPS-like PLS technology.

The contrast ratio of PVA matrices is a strong point, as it is with MVA. Older PVA panels offered contrast ratios of 1000 – 1200:1 typically, but remained true to their spec in many cases. As such at the time of their main production they were better than TN Film, IPS and even MVA in this regard.  Movie playback is perhaps one area which is a weak point for PVA, especially on Samsung’s overdriven panels. Noise and artifacts are common unfortunately and the panels lose out to MVA in this regard. Most PVA panels were true 8-bit modules, although some generations (see below) began to use 6-bit+FRC instead. There are no 10-bit supporting PVA panels available, either native 10-bit or 8-bit+FRC. Panel coating is generally light on PVA panels, quite similar to a lot of MVA panels.

The introduction of overdrive to PVA panels lead to the next generation of Super Patterned Vertical Alignment (S-PVA) technology in 2004. Like P-MVA panels were to MVA, these are really just an extension of the existing PVA technology, but with the MagicSpeed (overdrive) technology, they have managed to make them more suitable for gaming than the older panels. One other difference is that the liquid crystal cell structure is a boomerang shape, splitting each sub pixel into two different sections with each aligned in opposite directions. This is said to help improve viewing angles and colour reproduction when viewed from the side. Limitations still exist with S-PVA and they don’t offer as wide viewing angles as IPS-type panels, and still suffer from the off-centre contrast shift we’ve described. Most S-PVA panels offered a true 8-bit colour depth, but some did feature Frame Rate Control (FRC) to boost a 6-bit panel (6-bit+FRC).

In late 2009 Samsung started to produce their latest generation of so called “cPVA” panels. These new panels featured a simpler sub-pixel structure in comparison with S-PVA, but allowed Samsung to produce the panels at a lower cost, and drive down the retail cost of their new screens. It’s unclear what the “c” stands for. This is a similar approach to e-IPS which we discuss a little later on.

There is very little official information about this technology but some Samsung monitors started to be labelled as having an A-PVA panel around 2012 onwards. We suspect that nothing has really changed from S-PVA / cPVA panels, but that the term “Advanced” has been added in to try and distinguish the new models, and perhaps compete with LG.Display’s successful IPS technology and AU Optronics AMVA technology where they have also added the word “Advanced” for their latest generations (see AMVA and AH-IPS).

In Plane Switching (IPS – also known as ‘Super TFT’) technology was developed by Hitachi in 1996 to try and solve the two main limitations of TN Film matrices at the time, those being small viewing angles and low-quality color reproduction. The name In-Plane Switching comes from the crystals in the cells of the IPS panel lying always in the same plane and being always parallel to the panel’s plane (if we don’t take into account the minor interference from the electrodes). When voltage is applied to a cell, the crystals of that cell all make a 90-degrees turn. By the way, an IPS panel lets the backlight pass through in its active state and shutters it in its passive state (when no voltage is applied), so if a thin-film transistor crashes, the corresponding pixel will always remain black, unlike with TN matrices.

IPS matrices differ from TN Film panels not only in the structure of the crystals, but also in the placement of the electrodes – both electrodes are on one wafer and take more space than electrodes of TN matrices. This leads to a lower contrast and brightness of the matrix. IPS was adopted for colour professional displays due to its wide viewing angles, good colour reproduction and stable image quality. However, response times were very slow originally, making IPS unsuitable for dynamic content.

The original IPS technology became a foundation for several improvements: Super-IPS (S-IPS), Dual Domain IPS (DD-IPS), and Advanced Coplanar Electrode (ACE). The latter two technologies belong to IBM (DD-IPS) and Samsung (ACE) and are in fact unavailable in shops. The manufacture of ACE panels is halted, while DD-IPS panels are coming from IDTech, the joint venture of IBM and Chi Mei Optoelectronics – these expensive models with high resolutions occupy their own niche, which but slightly overlaps with the common consumer market. NEC is also manufacturing IPS panels under such brands as A-SFT, A-AFT, SA-SFT and SA-AFT, but they are in fact nothing more than variations and further developments of the S-IPS technology.

In 1998 production started for Super-IPS panels, and were mostly produced by LG.Philips (now LG.Display). They have gone through several generations since their inception. Initially S-IPS built upon the strengths of IPS by employing an advanced “multi-domain” liquid crystal alignmentt. The term S-IPS is actually still widely used in modern screens, but technically there may be subtle differences making them S-IPS, e-IPS, H-IPS, or p-IPS (etc) generations for example. See the following sections for more information.

Since their initial production in 1998 S-IPS panels have gained the widest recognition, mostly due to the efforts of LG.Philips LCD (now known as LG.Display), who were outputting rather inexpensive and high-quality 19″ – 30″ matrices. The response time was among the serious drawbacks of the IPS technology – first panels were as slow as 60ms on the “official” black-to-white-to-back transitions (and even slower on grey-to-grey ones!) Fortunately, the engineers dragged the full response time down to 25 ms and then 16ms later, and this total is equally divided between pixel rise and pixel fall times. Moreover, the response time doesn’t greatly grow up on black-to-gray transitions compared to the specification, so some older S-IPS matrices at the time could challenge TN Film panels in this parameter.

The IPS technology has always been at the top end when it comes to colour reproduction and viewing angles. Colour accuracy has always been a strong point, and even in modern displays the IPS matrices can surpass the performance of TN Film and VA equivalents. The viewing angles are a key part in this, since IPS matrices are free of the off-centre contrast shift that you can see from VA type panels. This is the reason why IPS is generally considered the preferred choice for colour critical work and professional colour displays, combining the excellent colour accuracy with truly wide viewing angles (178/178). S-IPS panels can show a purple colour when viewing dark images from a wide angle.

One main problem of the S-IPS technology traditionally was the low contrast ratio. Black depth was often a problem with S-IPS panels and contrast ratios of 500 – 600:1 were common for the early S-IPS offerings. However, these have been improved significantly, and contrast ratios are now much better as a result with modern IPS generations (see following sections). One other area which remains problematic for modern IPS panels is movie playback, again with noise being present, and only accentuated by the heavy application of overdrive technologies. S-IPS panels are sometimes criticized for their Anti-Glare (AG) coating, which can appear quite grainy and dirty looking, especially when viewing white/light backgrounds in office applications. Again that has been improved significantly in recent generations.

Moving Picture Image Sticking (MPIS) – S-IPS panels do not show any image sticking when touching a moving image. On the other hand severe image sticking happens in VA panel and lasts after the image is changed for a short time.

Sometimes you will see these terms being used, but S-IPS is still widely used as an umbrella for modern IPS panels. In 2002 Advanced Super IPS (AS-IPS) boosted the amount of light transmitted from the backlighting by around 30% compared with the standard Super IPS technology developed in 1998. This did help boost contrast ratios somewhat, but they could still not compete with VA panel types. In 2005 with the introduction of RTC technologies (Overdrive Circuitry – ODC) and dynamic contrast ratios, LG.Display started to produce their so called “Enhanced IPS” (E-IPS, not to be confused with e-IPS) panels. Pixel response times were reduced across G2G transitions to as low as 5ms on paper.

Enhanced S-IPS builds on S-IPS technology by providing the same 178° viewing angle from above and below and to the sides, and greatly improves the off-axis viewing experience by delivering crisp images with minimal colour shift, even when viewed from off-axis angles such as 45°. You will rarely see this E-IPS term being used to be honest. You may also occasionally see the name “Advanced S-IPS” (AS-IPS) being used, but this was just a name given specifically by NEC to the E-IPS panel developed and used in their very popular NEC 20WGX2 screen, released in 2006. The AS-IPS name was also (confusingly) used by Hitachi in some of their earlier IPS generations as shown below, back in 2002.

Above: Evolution of IPS as detailed by Hitachi Displays: “IPS technology was unveiled by Hitachi, Ltd. in 1995, and put to practical use in 1996. Since then, it has evolved into Super-IPS, Advanced-Super IPS, and IPS-Pro.”

In 2006 – 2007 LG.Display IPS panels have altered the pixel layout giving rise to ‘Horizontal-IPS’ (H-IPS) panels. In simple terms, the manufacturer has reportedly reduced the electrode width to reduce light leakage, and this has in turn created a new pixel structure. This structure features vertically aligned sub-pixels in straight lines as opposed to the arrow shape of older S-IPS panels.

In practice, it can be quite hard to spot the difference, but close examination can reveal a less ‘sparkly’ appearance and a slightly improved contrast ratio. Some users find a difference in text appearance as well relating to this new pixel structure but text remains clear and sharp. H-IPS will also often show a white glow from a wide angle when viewing black images, as opposed to the purple tint from S-IPS matrices. This is actually more noticeable than the S-IPS purple tint and is referred to as “IPS glow”. Some IPS panels in high end displays are coupled with an Advanced True Wide (A-TW) polarizer which helps improve blacks from wide viewing angles, and reduces some of the pale glow you can normally see. However, this A-TW polarizer is not included in every model featuring H-IPS and this should not be confused. It is very rarely used nowadays unfortunately. H-IPS panels from around this time are sometimes criticized for their Anti-Glare (AG) coating, which can appear quite grainy and dirty looking, especially when viewing white backgrounds in office applications.

Close inspection of modern IPS panels can show this new H-IPS pixel structure, although not all manufacturers refer to their models as featuring an H-IPS panel. Indeed, LG.Display don’t really make reference to this H-IPS version, although from a technical point of view, most modern IPS panels are H-IPS in format. As an example of someone who has referred to this new generation, NEC have used the H-IPS name in their panel specs for models such as the LCD2690WXUi2 and LCD3090WUXi screens.

The following technical report has feedback from the LG.Philips LCD laboratory workers: “Wedesigned a new pixel layout to improve the aperture ratioof IPS mode TFT-LCD (H-IPS). This H-IPS pixel layout design has reducedthe width of side common electrode used to minimize thecross talk and light leakage which is induced by interferencebetween data bus line and side common electrode of conventionalIPS mode. The side common electrodes of a pixel canbe reduced by horizontal layout of inter-digital electrode pattern whereconventional IPS pixel designs have vertical layout of inter-digital electrodes.We realized 15 inch XGA TFT LCD of H-IPS structurewhich has aperture ratio as much as 1.2 times ofcorresponding conventional IPS pixel design.” ©2004 Society for Information Display.

During 2009 LG.Display began to develop a new generation of e-IPS (it is unclear what the “e” actually stands for) panels which is a sub-category of H-IPS. They simplified the sub-pixel structure in comparison with H-IPS (similar to cPVA vs. S-PVA) and increased the transparency of the matrix by producing a wider aperture for light transmission. In doing so, they have managed to reduce production costs significantly by integrating the panels with lower cost, lower power backlight units. This allowed LG.Display to compete with the low cost TN Film panels and Samsung’s new cPVA generation. Because transparency is increased, they are able to reduce backlight intensity as you need less light to achieve the same luminance now.

The drawback of e-IPS in comparison with S-IPS is that the viewing angles are slightly smaller. When you take a look at an e-IPS matrix from a side, the image will lose its contrast as black turns into grey. On the other hand, there is no tonal shift (as with TN and cPVA matrixes) and the viewing angles, especially vertical ones, are still much larger than with TN Film. Many e-IPS panels are actually 6-bit + AFRC modules (as opposed to true 8-bit) which might explain how the costs are kept very low in some cases, although in practice the FRC algorithm is very well implemented and you are unlikely to see any obvious side affects. Like H-IPS panels from years prior, e-IPS panels are sometimes criticized for their Anti-Glare (AG) coating, which can appear quite grainy and dirty looking, especially when viewing white backgrounds in office applications.

These are new names which some manufacturers seem to promote a little around 2009 – 2010. It has been stated that these ‘new’ panels offer improved energy efficiency, but it’s unclear what the new letters stand for. Perhaps the ‘UH-IPS’ stands for ‘Ultra Horizontal-IPS’? It certainly seems these are just slightly updated versions of H-IPS panels as was e-IPS. It’s possible as well that UH-IPS is just the same thing as e-IPS, with different manufacturers using different terminology to try and separate their displays. We suspect that UH-IPS is either the same thing as e-IPS, or a sub-category of that development, which in turn is a sub-category of H-IPS.

Some spec sheets from LG.Display give some clues as to the differences. The lines separating the sub-pixels are smaller than with H-IPS and therefore the UH-IPS technology has an 18% higher aperture ratio. The drive for increased LCD panel transmissivity is not for the purpose specifically of increasing on screen brightness, but rather to maintain brightness and reduce backlight lamps, inverters, and optical films in order to lower panel costs. LG have used this terminology with some of their LED backlight monitors.

Another term used by some manufacturers around 2010 with the launch of their IPS screens. This “S-IPS II” reportedly has an even higher aperture ratio than UH-IPS (11.6% higher), further improving brightness and contrast and helping save energy. It looks also from the information available (above) that the pixel structure has been altered and is no longer vertical as with H-IPS, but more like the traditional S-IPS / AS-IPS “arrow” layout. This looks more like an e-IPS type development, but returning to the older S-IPS pixel layout as opposed to developing H-IPS.

This was a new name which NEC introduced in early 2010 with their new PA series of screens. Thankfully they’ve been kind enough to tell us what the ‘p’ stands for in their marketing, giving rise to the generation of ‘Performance IPS’ panels. This new panel name is being used in the new 24″ – 30″ sized screens (PA241W, PA271W and PA301W). In fact the p-IPS name is just a sub-category of H-IPS technology, being created as a way for NEC to distinguish their new “10-bit” models from the rest of their range. In addition, when you look into the details of it the panels are actually an 8-bit module with 10-bit receiver, giving you an 8-bit + FRC module. This is capable of producing a 1.07 billion colour palette (10-bit) through FRC technology but it is not a true 10-bit colour depth.

It’s all very well saying a panel is capable of 10-bit colour depth (1.07 billion colour palette) as opposed to an 8-bit colour depth (16.7 million colours), but you need to take into account whether this is practically useable and whether you’re ever going to truly use that colour depth. Apart from the requirements of your application, operating system, graphics card and software, one more pertinent limitation is from a display point of view, where there must be an interface which can support 10-bit colour depth. At the moment DisplayPort and Dual-link DVI are the only options which can. A full 10-bit work flow is still extremely uncommon in the current market.

Regardless of whether you have a true10-bit colour depth being displayed, a screen with 10-bit capabilities still has its advantages. The monitor should still be capable of scaling the colours well, even from 24-bit sources. Most of these 10-bit panels will also be coupled with extended internal processing which will help improve accuracy and these are better translated onto a 10-bit panel than they would be onto an 8-bit panel, giving less deviation and less chance of banding issues.

This term was introduced by LG.Display in 2011 and primarily used when talking about their smaller panels, used in tablets and mobile devices. The term “Retina” (introduced by Apple) has also been used to describe these new panels, offering increased resolution and PPI. That seemed to be the main focus of AH-IPS panels when first introduced although they also offered an increased aperture size, allowing for greater light transmission and lower power consumption as a result. In the desktop monitor market the term “AH-IPS” has been used by several manufacturers in an effort to try and distinguish their new models, when in fact many could equally be described as H-IPS or e-IPS. With the high resolution aspect in mind, the modern 27″ 2560 x 1440 IPS panels could sensibly be referred to as AH-IPS and the term has been used for some of the very recent panels. In fact there have been a couple of other changes in IPS based screens at around the same time (2012) with the introduction of wide gamut GB-r-LED backlighting, and the change in the Anti-Glare (AG) coating being used. With older S-IPS / H-IPS panels often being criticised for their grainy AG coating, this new lighter coating offers improved picture quality and sharpness.

The term AH-IPS seems to be widely used now in 2014/2015 for modern IPS panels, and with the arrival of other ultra-high res panels we expect it to be used for some time. Performance characteristics remain very similar to older H-IPS and e-IPS panel generations overall. Response times are generally very good nowadays, with quoted specs as low as 5ms G2G common. They aren’t quite as fast as modern TN Film panels still in most cases. Only very recently (2015) have high refresh rate IPS-type panels been introduced, although not by LG.Display (see AHVA section). At the time of writing there is no native support for 120Hz+ refresh rates at this time from LG.Display manufactured IPS-variants. Some Korean manufactured displays featuring IPS panels are capable of being “over-clocked” to 100Hz+ but this is not officially supported by the panel, and can really vary from one screen to another. Furthermore, response times are not adequate to provide optimum gaming experience in most cases, despite the improved refresh rate.

Contrast ratios were typically around 700 – 800:1 in practice up until a couple of years ago, but some can reach up to around 1000:1 – 1100:1 in the better cases nowadays. They are still not capable of challenging VA-type matrices in this area. Viewing angles are still wider than those offered by VA and TN Film panels, with a more stable image and less contrast/colour shift across the panel. They are also free from the off-centre contrast shift issue seen on VA panels. When viewed from an angle, dark content can show a pale / white glow which some user find distracting. This so-called “IPS glow” can be problematic on larger screen sizes, especially when working in darker environments or with a lot of dark content. It is often mistaken for backlight bleed, when in fact the glow changes as you change your line of sight or move further away from the screen.

LG.Display’s IPS panels are available in a wide variety of sizes and resolutions, including panels with Ultra HD (3840 x 2160), 4k (4096 x 2160) and even 5k (5120 x 2880) resolutions. A lot of their current focus seems to be on ultra-high DPI screens like this, and they are also investing in ultra-wide 21:9 aspect ratio and curved format displays in various sizes, up to 34″.

PLS was introduced by Samsung at the end of 2010 and designed to compete with LG.Display’s long-established and very popular IPS technology. It is an IPS-type technology and for all intents and purposes can be considered IPS, just being manufactured by another company. Samsung claimed they had reduced production costs compared with IPS by about 15% and so were making a play at the market of IPS panels when it was launched. At the time it was also being dubbed “S-PLS” (Super-PLS) but that name seemed to be dropped quite quickly in favour of just “PLS”. It wasn’t until mid 2011 that the first PLS displays started to appear, fittingly they were manufactured by Samsung themselves. The Samsung S27A850D was the first of its kind and its overall performance certainly reminded users of IPS panels.

Response times are very comparable to IPS matrices, with 5ms G2G being the current lowest spec on paper. There is currently no support for refresh rates above 60Hz from Samsung PLS panels, although there are some Korean manufactured screens which can be over-clocked to 100Hz refresh rates. This is not natively or officially supported though. Contrast ratios are typically around 700 – 900:1 in practice, although can reach up to 1000:1 in some cases as per their spec. Viewing angles are very comparable to IPS as well with wide fields of view and freedom from the off-centre contrast shifts you see from VA panels. From a wide angle dark content has a pale / white glow to it like modern IPS panels, again leading to a fair amount of so-called “PLS-glow” which can be distracting to some users. AG coating is also light, much like the light coating used on modern AH-IPS panels from LG.Display.

All in all, PLS is very comparable in practice to IPS. It should be noted that some display manufacturers market their screens as using an IPS panel, whereas underneath the hood the panel is actually a Samsung PLS matrix. Testament to how close these technologies are really considered although somewhat mis-leading. Samsung have largely moved away from their focus on PVA panels and are concentrating on PLS (and TN Film still) now instead. At the time of writing PLS panels are typically available in sizes between 23 and 27″ with resolutions up to 2560 x 1440. They do also have a 31.5″ panel with Ultra HD 3840 x 2160 available which is currently their largest. They do not currently manufacturer any ultra-wide 21:9 aspect ratio of curved format panels.

In 2012 some PLS based screens started to be marketed using the “AD-PLS” name. It is unclear what is supposed to have changed, if anything, with these recent panel variants. We suspect this is just a marketing name designed to keep up with LG.Display’s change to the “Advanced High-Performance IPS (AH-IPS)” name from the same time. Performance characteristics remain as described in the PLS section above.

Again like Samsung’s PLS technology, AU Optronics have invested in their own IPS-type technology since 2012, dubbed AHVA. This technology is designed by AU Optronics as another alternative to IPS. Confusingly the AHVA name makes it sound like it’s a VA-type panel, which AU Optronics have been manufacturing for many years. It should not be confused with AMVA which is their current “true” VA technology produced. The BenQ BL2710PT was the first display featuring this new technology and gave us some insight into the performance characteristics of AHVA, confirming how closely it resembled an LG.Display IPS panel.

Response time specs reach as low as 4ms G2G on paper but in reality the matrix does not perform any better than the faster IPS or PLS panel versions. Contrast ratios can reach up to the advertised 1000:1 and viewing angles are also very comparable to IPS. There is no off-centre contrast shift like you see on normal VA panels, but a pale glow is visible on dark content from an angle like with IPS/PLS. The AG coating is very light, often semi-glossy.

In very recent times (2015) AU Optronics have been the first to release official high refresh rate (144Hz) IPS-type panels, through their AHVA technology. The first display to use one of these panels was the Acer Predator XB270HU which was impressive when it came to refresh rate support and response times. We expect further panels to emerge at a later date with 120Hz+ refresh rates which can only be a good thing when it comes to gaming. With the addition of this high refresh rate we also saw the first inclusion of a blur reduction backlight (from the NVIDIA ULMB mode) on an IPS-type panel. Again a positive sign when it comes to the gaming future of IPS-type panels.

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