Which is better super amoled or ips screens. Subscribe to news

I was inspired to create this article by two things: numerous speculations by marketers and specialized journalists on the topic of screens; and a bunch of absolutely identical comment threads under smartphone reviews with absolutely identical discussions about which matrices are better. Usually, the hottest thing happens under reviews of Chinese phones with OLED screens. I’m tired of fighting windmills, communicating with each reader individually, in this material I decided to dot all the i’s and dispel numerous myths about modern screens, looking ahead I will say that the emphasis will be on the confrontation between IPS and AMOLED matrices. Most likely, most of you will not see anything new in what has been written; you will not receive sacred knowledge here, nor will you be stripped of your veils. I will talk about obvious things that neither bloggers nor journalists want to talk about. The guide is designed for adequate thinking people; convinced fanatics can go about their business.

Definition of the term “screen”

Before getting to the point, we need to define the term screen and clarify its functional purpose. Wikipedia tells us that a screen or display is an electronic device designed to display information visually. If we try to give a less laconic and more modern definition of the screen from the point of view of functionality and with an emphasis on consumer properties, then it will turn out something like this: a screen is a device whose task is to display as accurately and in detail as possible all kinds of content and the user interface of operating systems and applications such how the authors intended them. Physical resolution is responsible for “maximum detail”, otherwise: the number of smallest screen elements (picture’s elements) or simply pixels (pixels), the higher the resolution the better, ideally it should be infinitely large. “As accurately as possible” are responsible for such parameters as: color accuracy and contrast, or the ratio of the lightest and darkest point on the screen. Secondary parameters that do not directly affect the accuracy or detail of information display, but affect the consumer properties of the screen, include: maximum brightness, picture distortion when the view deviates from perpendicular, reflectance, picture refresh rate, response time, energy efficiency and some others . A special parameter stands out: color gamut - the most important parameter for professional monitors and practically meaningless for devices intended for consuming content. But it is the color gamut that has been the subject of much speculation by manufacturers of mobile gadgets in recent years. Let's clear up this murky topic before moving on.

What is color gamut and why is it the subject of much speculation?

You need to start with the fact that any image is encoded when captured and stored in the memory of a photo or video camera. Artificially created pictures and clips, as well as parts of the graphical user interface of operating systems and applications, are initially encoded in a similar way. In both cases, color information is represented using a color model - a special mathematical tool for describing color using numbers or, more precisely, coordinates. The most common is the three-dimensional RGB model, in which each color is described by a set of three coordinates responsible for one of the colors: red, green and blue; the displayed hue depends on the brightness ratio of each component. Modern screens are capable of displaying only part of the spectrum of colors and shades visible to humans; color gamut literally means how large this “part” is. Due to such limitations, a person is forced to create standards for representing the color spectrum based on the capabilities of existing screens. So in 1996, to unify the use of the RGB model in monitors and printing, HP and Microsoft developed the sRGB standard, which used the primary colors described by the BT.709 standard, common on television at that time, and gamma correction designed for monitors with cathode ray tubes. It is important to understand that such unification allows, albeit with some reservations, to guarantee that the creator and consumer of content on their screens will see approximately the same thing. Subsequently, the sRGB standard became widespread in all areas of content production, including the creation of Internet sites. Of course, there are other standards for representing the color spectrum, such as Adobe RGB, which has a much wider color gamut, but today the vast majority of content is encoded in accordance with sRGB.

What happens if sRGB content is viewed on a screen with a wider color gamut without adaptation? The coordinates of the sRGB space will be transferred to the coordinate system of the color space of such a screen, as a result of which the colors will appear more saturated than they actually are, in some cases the shades will be distorted so much that orange will become red, light green green, and blue blue. Conversely, if content with a wider color gamut is viewed on an sRGB screen, the coordinate shift will cause the colors to appear less saturated than they should be.

We all know that the screens of most modern flagship smartphones have an expanded color gamut relative to sRGB, so how does this affect their consumer properties? If this is a smartphone or tablet on Android, then three options are possible. In the best case, the shell settings will contain preset color profiles, among which there is one that brings the space to the sRGB standard, an example would be MIUI or the shell from Samsung. But even in this case, applying profiles on the fly is impossible, and the user will have to choose between an expanded color gamut and correct color rendition. The second option is when the system does not have built-in profiles, but in the developer settings you can activate the sRGB mode, for example, this can be done on Google Pixel and OnePlus 3T smartphones. Unfortunately, the operating system GUI becomes faded when sRGB mode is activated, as it is coded according to the color gamut of their screens. In the third worst case scenario, the user will not find any profiles in the system and, accordingly, will not receive any choice; he will be left to enjoy oversaturated colors. But in personal computers running Windows and MacOS there is no such problem, since both systems not only support color profiles, but can also “on the fly” convert colors from one space to another, that is, regardless of what content and on what screen will be displayed, the user, with some reservations, will see the colors as the author intended them. A similar color profile management system is available in iOS. Manufacturers, either for the sake of beautiful numbers on the specifications page, or just for the sake of it, continue to install IPS and OLED screens with an expanded color gamut in flagship models, despite the fact that there is no need for this, since 99% of the content complies with the sRGB standard and the situation is unlikely to change radically in the near future. There are simply no tasks that such screens can perform in devices designed for content consumption. All this would make at least some sense if Google added color profile management to Android, as Apple did, but at least in 2017 we won’t see this. The irony is that the problem was created out of nowhere, and no one is in a hurry to solve it.

Liquid crystal screen: operating principle; Advantages and disadvantages

Twenty years ago, most monitors and televisions were equipped with screens based on cathode ray tubes; they were soon replaced by liquid crystal displays or LCD (liquid crystal display), which over time received several branches of development and today there are three technologies for the production of liquid crystal matrices screens: TN, MVA and IPS, the latter, due to a successful combination of advantages and disadvantages, has become dominant in the mobile technology segment. The operating principle of an LCD is simple, some parts may vary depending on the manufacturing technology, but a typical matrix includes a backlight lamp and six other layers. The first thing behind the lamp is a vertical filter that polarizes the light accordingly. Behind it are two layers of electrodes with a layer of liquid crystals located between them; the voltage applied to the electrodes orients the crystals and they refract the light so that it passes or does not pass through the next layer - a horizontal polarizing filter. The last is a color filter - red, green or blue. Liquid crystal screens are lighter, more compact and more energy efficient than their predecessors, but they also have a number of serious drawbacks, in particular low contrast and black depth, and even limited color gamut potential, which depends on the imperfection of the backlight. In addition, brightness and contrast may deteriorate if you look at the screen at a different angle.

Organic LED screen: advantages, disadvantages, PWM, Pentile

Relatively recently, LCD has a serious competitor - these are screens with active matrix organic light-emitting diodes or AMOLED. Such screens are fundamentally different from LCDs in that the light source in them is not a backlight lamp, but each subpixel separately, which gives AMOLED many advantages over liquid crystal screens, the main ones being: almost infinite contrast; less power consumption when displaying images with a predominance of dark tones; potentially wider color gamut; and smaller dimensions. The first AMOLED screens, in addition to their advantages, also had significant disadvantages, including: inaccurate color rendition; rapid burnout of LEDs; high power consumption when displaying images with a predominance of light colors; flicker due to pulse width modulation; and most importantly the high cost of production. Over time, most of the shortcomings were overcome or reduced to a minimum, except for PWM, which to this day is the Achilles heel of the technology. Pulse width modulation, or PWM, is one way to adjust the brightness of LEDs, which has the side effect of causing the screen to flicker at a certain frequency. Most people are not susceptible to this kind of flicker, but for some users, PWM can cause rapid eye fatigue and even headaches. It is important to note that the flickering effect is completely absent at brightness values ​​close to maximum and begins to appear at brightness levels of 80% and below.

It is impossible to ignore the topic of organizing subpixels in screens based on organic LEDs; the fact is that in most AMOLED matrices, subpixels are arranged according to the RGBG scheme, when a pixel consists not of three subpixels like a typical LCD screen, but of four: red, blue and two green, this scheme is also called Pentile. The manufacturer (Samsung) considers the physical resolution of such screens to be exactly two times less in terms of the number of green subpixels, red and blue subpixels in the matrix. Obviously, to obtain a shade you need at least three full-fledged subpixels. Thus, the effective resolution of such screens is not equal to the nominal resolution specified in the official specification. For example, for a QHD screen the nominal resolution is 2560*1440 pixels, the resolution based on the number of red and blue subpixels will be approximately 1811*1018:

The effective resolution of such a matrix, taking into account the clever interpolation algorithms embedded in the screen controller, is somewhere between 1811 * 1018 and 2560 * 1440, we can assume that it corresponds to FullHD resolution in RGB matrices. It may very well be that it is precisely for this compliance that Samsung has been choosing QHD resolution for its flagship smartphones for many years in a row.

Detailed comparison of IPS and AMOLED using the example of iPhone 7 and Galaxy S8 smartphone screens

Now that we have learned everything about the characteristics of screens and the features of different types of matrices, we can move on to the main question: which technology is better? I’m sure it’s correct to try to answer this question by comparing the best AMOLED and IPS matrices available today, namely the screens of the Samsung Galaxy S8 and Apple iPhone 7 smartphones. Since I have not yet acquired testing equipment, I will analyze the test results taken from a reputable resource. Let's start with the resolution, the Galaxy S8 screen has 2960*1440 pixels, the guaranteed effective resolution will be 2094*1018, the guaranteed effective pixel density will be 403 per inch. The iPhone 7 Plus has a lower nominal effective resolution: 1920*1080, and an effective pixel density of 401 per inch. The advantage is obvious in favor of the screen from the Korean vendor. The resolution of both screens is enough for everyday use and not enough for comfortable use with virtual reality helmets. Next, let's move on to accuracy; the contrast ratio of the Galaxy S8 is almost infinite. The iPhone 7 has a stated contrast ratio of 1400:1, but the actual contrast is slightly higher – 1700:1; this contrast is more than enough for comfortable viewing of content. It turns out that in this parameter the screen of the Galaxy S8 was ahead. As for color accuracy, both smartphones showed virtually identical results; color errors in the Galaxy S8 and iPhone 7 can be safely ignored. You can see the most important secondary characteristics in my opinion below:

As for the color gamut, the iPhone 7 is ahead here, since it can display the colors of the DCI-P3 space or 126% of the sRGB field, while the user does not need to sacrifice color rendition; the content is displayed based on the color profile embedded in it. The Galaxy S8 screen has an even wider color gamut - approximately 142% of the sRGB field, but does not have color profile management, driving the user into a corner, that is, into the Main mode, which corresponds to 100% of the sRGB field.

So what's the bottom line? If we consider screen technologies in isolation from the final product, AMOLED today is superior to IPS in almost everything, although it still has problems with PWM and high power consumption. Without any doubt, OLED matrices are the future. Unfortunately, due to the limitations of Android, their full potential has not yet been realized. When comparing ready-made solutions in the form of Galaxy S8 and iPhone 7, the slight superiority of the latter due to honest DCI-P3 and standard other parameters is obvious. I would like to warn you against projecting the results of the above comparison onto absolutely all IPS and AMOLED screens. There are a lot of good, average and bad matrices on the market, and each case needs to be analyzed separately. Internet publications focused on technical detail and reliability will help us with this; among such publications I would include the already mentioned, anandtech.com and some other sites, from Russian-language sites - ixbt.com.

Perhaps you shouldn’t take the consumer properties of screens too seriously, because objective information is almost always superimposed on the factor of subjective perception. For example, in Southeast Asia there are a lot of people who like unnatural, oversaturated colors; in our country there are also quite a few such people. On the other hand, broadcasting information poured into the ears by marketers in numerous discussions under reviews on YouTube is at least strange. Finally, I’ll be Cap and give you a couple of banal tips: don’t stop thinking and be critical of any information you receive from brand representatives and the media, know how to analyze data and check facts, or just read resources and watch bloggers you can trust.

By 2018, the competition between screen technologies had come down to the fact that there were only two worthy options left on the market. TN matrices were supplanted, VA matrices were not used in mobile devices, and something new had not yet been invented. Therefore, competition has developed between IPS and AMOLED. It’s worth remembering here that IPS, LCD LTPS, PLS, SFT are the same as OLED, Super AMOLED, P-OLED, etc. are just variations of LED technology.

On the topic of what is better, IPS or AMOLED, . But technology does not stand still, so in 2018 it will not be superfluous to make adjustments and analyze it taking into account today’s realities. After all, both types of matrices are constantly being improved, some disadvantages are eliminated, or these disadvantages become less significant.

Now let’s try to find out which is better for a smartphone, IPS or AMOLED. To do this, we will weigh all the pros and cons of each technology in order to identify the absolute leader based on the preponderance of strengths or, taking into account the specifics, decide what is better in specific conditions.

Pros and cons of IPS displays

The development and improvement of IPS displays has been going on for two decades, and during this time the technology has acquired a number of advantages.

Advantages of IPS matrices

IPS matrices are the best among all types of LCD panels due to a number of advantages.

• Availability. Over the years of development, many companies have massively mastered the technology, making mass production of IPS screens inexpensive. The cost of a smartphone screen with FullHD resolution now starts at around $10. Due to their low price, such screens make smartphones more affordable.
• Color rendition. A well-calibrated IPS screen reproduces colors with maximum accuracy. That is why professional monitors for designers, graphic artists, photographers, etc. are produced on IPS matrices. They have the greatest coverage of shades, which allows you to get realistic colors of objects on the screen.
• Fixed power consumption. Liquid crystals that form the image on an IPS screen consume almost no current; the main consumer is backlight diodes. Therefore, energy consumption does not depend on the image on the display and is determined by the backlight level. Due to the fixed power consumption, IPS screens provide approximately the same autonomy when watching movies, web surfing, written communication, etc.
• Durability. Liquid crystals are almost not subject to aging and wear, so in terms of reliability, IPS is better than AMOLED. Backlight LEDs can degrade, but the service life of such LEDs is very long (tens of thousands of hours), so even after 5 years the screen hardly loses its brightness.

Disadvantages of IPS matrices

Despite significant advantages, IPS also has disadvantages. These shortcomings are fundamental and cannot be eliminated by improving technology.

• Black purity problem. Liquid crystals, which display black, do not block light from the backlight 100%. But since the backlight of the IPS screen is common to the entire matrix, its brightness does not decrease, the panel remains illuminated, and as a result the black color is not very deep.

• Low contrast. The contrast level of LCD matrices (approximately 1:1000) is acceptable for comfortable picture perception, but in this regard AMOLED is better than IPS. Due to the fact that the black is not very deep, the difference between the brightest and darkest pixels in such screens is noticeably smaller than in LED matrices.
• Long response time. The pixel response speed of IPS panels is low, about tens of milliseconds. This is enough for normal image perception when reading or watching videos, but not enough for VR content and other demanding tasks.

Pros and cons of AMOLED displays

OLED technology is based on the use of an array of miniature LEDs located on a matrix. They are independent, so they offer a number of advantages over IPS, but they are not without their disadvantages.

Advantages of AMOLED matrices

AMOLED technology is newer than IPS, and its creators have taken care to eliminate the disadvantages characteristic of LCD displays.

• Separate pixel glow. In AMOLED screens, each pixel itself is a light source and is controlled by the system independently of the others. When displaying black, it does not glow, and when displaying mixed shades, it can produce increased brightness. Due to this, AMOLED screens demonstrate better contrast and black depth.

• Almost instant response. The response speed of pixels on an LED matrix is ​​orders of magnitude higher than that of IPS. Such panels are capable of displaying a dynamic picture at a high frame rate, making it smoother. This feature is a plus in games and when interacting with VR.
• Reduced power consumption when showing dark tones. Each pixel of the AMOLED matrix lights up independently. The lighter its color, the brighter the pixel, so when displaying dark tones, such screens consume less power than IPS. But when displaying white AMOLED panels, they show similar, or even greater, battery consumption than IPS.
• Small thickness. Since AMOLED matrices do not have a layer that scatters backlight light onto liquid crystals, such displays are thinner. This allows you to reduce the size of your smartphone while maintaining its reliability and without sacrificing battery capacity. In addition, in the future it is possible to create flexible (and not just curved) AMOLED matrices. This is not possible for IPS.

Disadvantages of AMOLED matrices

AMOLED matrices also have disadvantages, and the culprit for most troubles is one. These are blue LEDs. Mastering their production is more difficult, and they are inferior in quality to green and red ones.

• Sineva or PWM. When choosing a smartphone with an AMOLED screen, you have to choose between pulse-width brightness control and blue light tones. This is due to the fact that with a continuous glow, blue subpixels are perceived stronger than red and green ones. This can be corrected by using PWM brightness control, but then another drawback emerges. At maximum screen brightness there is no PWM or the adjustment frequency reaches about 250 Hz. This indicator is on the border of perception and has almost no effect on the eyes. But when the backlight level decreases, the PWM frequency also decreases; as a result, at low levels, flickering with a frequency of about 60 Hz can lead to eye fatigue.

• Blue Burnout. There is also a problem with blue diodes. Their service life is shorter than green and red ones, so color reproduction may become distorted over time. The screen turns yellow, the white balance shifts towards warm tones, and the overall color rendition deteriorates.

• Memory effect. Since miniature LEDs are prone to fading, areas on the screen that displayed a bright, static image (for example, a clock or a light-colored network indicator) may lose brightness over time. As a result, even if the element is not displayed, the silhouette of this element is visible in these places.

• PenTile. The PenTile structure is not a fundamental disadvantage of all AMOLED panels, but is still characteristic of most of them. With this structure, the matrix contains an unequal number of red, green and blue subpixels (Samsung has half as many blue ones, LG has twice as many). The main motive for using PenTile is the desire to compensate for the shortcomings of blue LEDs. However, a side effect of this solution is a decrease in picture clarity, which is especially noticeable in VR headsets.

Taking into account all the features of both types of matrices, it can be noted that high-resolution IPS is better if you are interested in VR and need maximum picture clarity. After all, in AMOLED, the comfortable perception of virtual reality is slightly hampered by PenTile, and the PWM backlight so far neutralizes the instantaneous response speed. IPS is also better if you have to work more with light colors (web surfing, instant messengers).

AMOLED screens are the future, but the technology is not perfect yet. However, you can safely buy a smartphone with an LED screen, especially if it is a flagship. Brightness, contrast, deep blacks and energy savings when displaying dark tones can overcome all the disadvantages of OLED.

In this article I will not go into the technical details of creating IPS and AMOLED matrices, they are not so interesting in this case. What is more important is what the average consumer gets when choosing this or that matrix. Therefore, in this material I will talk about the practical advantages and disadvantages of these two types of matrices.

Benefits of IPS

IPS matrices are an evolutionary development of TFT displays, but with a number of specific advantages. Firstly, they have much better color reproduction; the picture on IPS is much brighter and richer. Secondly, they have much higher viewing angles; when deviated, the picture does not fade. The overall brightness level of IPS panels is also superior to conventional TN displays. The last advantage is natural white color, which is quite problematic to achieve on AMOLED.

Advantages of AMOLED

AMOLED matrices are produced by Samsung and were initially used only by it, but later other manufacturers also gained access to such displays.

The first advantage of AMOLED matrices is the natural black color; on both IPS and TN matrices, the black color is more like gray, especially at maximum brightness. With AMOLED, you get perfect blacks, and the added bonus is reduced power consumption when displaying them.

The second plus is the high contrast of the picture. Many users love AMOLED displays for their bright and rich colors. Any picture looks very cool on such screens.

The third advantage is the high level of maximum brightness. In a direct comparison, on a bright sunny day, the AMOLED matrix will outperform IPS.

The fourth advantage is low power consumption. Smartphones equipped with IPS screens will discharge with an active screen much faster than their counterparts with AMOLED

Disadvantages of IPS

Perhaps the only drawback of IPS matrices is their imperfect display of black colors. Otherwise, these are excellent displays with natural color reproduction, maximum viewing angles and good brightness levels.

Disadvantages of AMOLED

AMOLED displays have a special pixel structure that uses a larger number of green subpixels; this solution has one significant drawback called PenTile. When reading small text, you may notice red halos around the letters, which some people find annoying.

The second disadvantage is PWM (pulse width modulation). Its essence is that individual pixels turn on/off at a very high speed, visually indistinguishable by the human eye. This is done to reduce power consumption, but in fact the eyes get tired faster from such displays. Because of this, such displays on the camera may flicker.

Conclusion

And yet, despite the disadvantages listed above, it is AMOLED displays that are installed in the flagships of most large companies. The thing is that, all other things being equal, they show a brighter and juicier picture, as well as better behavior in the sun.

IPS matrices are also good displays, so Meizu installs them in most mid-segment smartphones, leaving AMOLED for flagships.

Describing the differences between IPS and TN matrices as part of advice when buying a monitor or laptop. It's time to talk about all the modern display production technologies that we may encounter and have an idea about types of matrices in devices of our generation. Do not confuse with LED, EDGE LED, Direct LED - these are types of screen backlighting and display technologies are indirectly related.

Probably everyone can remember the monitor with a cathode ray tube that they used before. True, there are still users and fans of CRT technology. Currently, screens have increased in diagonal size, display manufacturing technologies have changed, and there are more and more varieties in the characteristics of matrices, denoted by the abbreviations TN, TN-Film, IPS, Amoled, etc.

The information in this article will help you choose a monitor, smartphone, tablet and other various types of equipment. In addition, it will highlight the technologies for creating displays, as well as the types and features of their matrices.

A few words about liquid crystal displays

LCD (Liquid Crystal Display) is a display made from liquid crystals that change their location when voltage is applied to them. If you come close to such a display and look closely at it, you will notice that it consists of small dots - pixels (liquid crystals). In turn, each pixel consists of red, blue and green subpixels. When voltage is applied, the subpixels are arranged in a certain order and transmit light through them, thus forming a pixel of a certain color. Many such pixels form an image on the screen of a monitor or other device.

The first mass-produced monitors were equipped matrices TN- having the simplest design, but which cannot be called the highest quality type of matrix. Although among this type of matrices there are very high-quality specimens. This technology is based on the fact that in the absence of voltage, subpixels transmit light through themselves, forming a white dot on the screen. When voltage is applied to the subpixels, they are arranged in a certain order, forming a pixel of a given color.

Disadvantages of TN matrix

• Due to the fact that the standard pixel color, in the absence of voltage, is white, this type of matrix does not have the best color rendering. Colors appear duller and faded, and blacks appear more of a dark gray.
• Another main disadvantage of a TN matrix is ​​small viewing angles. Partially they tried to cope with this problem by improving TN technology to TN+Film, using an additional layer applied to the screen. Viewing angles became larger, but still remained far from ideal.

At the moment, TN+Film matrices have completely replaced TN.

Advantages of TN matrix

• fast response time
• relatively inexpensive cost.

Drawing conclusions, we can say that if you need an inexpensive monitor for office work or surfing the Internet, monitors with TN+Film matrices are best suited.

The main difference between IPS matrix technology and TN— perpendicular arrangement of subpixels in the absence of voltage, which form a black point. That is, in a state of calm the screen remains black.

Advantages of IPS matrices

• better color reproduction compared to screens with TN matrices: you have bright and rich colors on the screen, and black remains truly black. Accordingly, when voltage is applied, the pixels change color. Considering this feature, owners of smartphones and tablets with IPS screens can be advised to use dark color schemes and wallpapers on the desktop, then the smartphone’s battery life will last a little longer.
• large viewing angles. On most screens they are 178°. For monitors, and especially for mobile devices (smartphones and tablets), this feature is important when the user chooses a gadget.

Disadvantages of IPS matrices

• long screen response time. This affects the display in dynamic pictures such as games and movies. In modern IPS panels, things are better with response time.
• higher cost compared to TN.

To summarize, it is better to choose phones and tablets with IPS matrices, and then the user will receive great aesthetic pleasure from using the device. The matrix for a monitor is not so critical, modern ones.

AMOLED screens

The latest smartphone models are equipped with AMOLED displays. This technology for creating matrices is based on active LEDs, which begin to glow and display color when voltage is applied to them.

let's consider features of Amoled matrices:

• Color rendition. The saturation and contrast of such screens are higher than required. The colors are displayed so brightly that some users may experience eye strain when using their smartphone for long periods of time. But the black color is displayed even blacker than even in IPS matrices.
• Display power consumption. Just like IPS, displaying black requires less power than displaying a specific color, much less white. But the difference in power consumption between displaying black and white in AMOLED screens is much greater. Displaying white requires several times more energy than displaying black.
• "Picture Memory". If a static image is displayed for a long time, marks may remain on the screen, and this in turn affects the quality of the information displayed.

Also, due to their rather high cost, AMOLED screens are currently only used in smartphones. Monitors built on this technology are unreasonably expensive.

VA (Vertical Alignment)- this technology, developed by Fujitsu, can be considered as a compromise between TN and IPS matrices. In VA matrices, the crystals in the off state are located perpendicular to the screen plane. Accordingly, the black color is ensured as pure and deep as possible, but when the matrix is ​​rotated relative to the direction of view, the crystals will not be visible equally. To solve the problem, a multi-domain structure is used. Technology Multi-Domain Vertical Alignment (MVA) provides protrusions on the plates that determine the direction of rotation of the crystals. If two subdomains rotate in opposite directions, then when viewed from the side, one of them will be darker and the other lighter, so for the human eye the deviations cancel out. There are no protrusions in PVA dies developed by Samsung, and the crystals are strictly vertical when turned off. In order for the crystals of neighboring subdomains to rotate in opposite directions, the lower electrodes are shifted relative to the upper ones.

To reduce response time, Premium MVA and S-PVA matrices use a dynamic voltage increase system for individual sections of the matrix, which is usually called Overdrive. The color rendition of PMVA and SPVA matrices is almost as good as that of IPS, the response time is slightly inferior to TN, the viewing angles are as wide as possible, the black color is the best, the brightness and contrast are the highest possible among all existing technologies. However, even with a slight deviation of the direction of view from the perpendicular, even by 5–10 degrees, distortions in halftones can be noticed. This will go unnoticed by most, but professional photographers continue to dislike VA technology for this.

MVA and PVA matrices have excellent contrast and viewing angles, but the situation with response time is worse - it grows as the difference between the final and initial states of the pixel decreases. Early models of such monitors were almost unsuitable for dynamic games, but now they show results close to TN matrices. Color rendering *VA matrices, of course, is inferior to IPS matrices, but remains at a high level. However, due to their high contrast, these monitors are an excellent choice for working with text and photography, with drawing graphics, and also as home monitors.

In conclusion, I can say that the choice is always yours...

The competition of screen technologies is of particular importance in the world of electronics, since they are used in almost every field of activity. Every year their development is becoming more noticeable, which is why it can be difficult to choose a device with the right display. This article talks about which is better - AMOLED or IPS.

AMOLED

A ctive M atrix O organic L ight E mitting D iode (active matrix on organic light-emitting diodes) - this is how this acronym stands for. This technology originates in OLED matrices, where liquid crystals were replaced by organic LEDs that do not require backlighting. Receiving electric current, they themselves emit light.

In this case, OLED is divided into two types: PMOLED (Passive Matrix) and AMOLED (Active Matrix). The first is practically not used in modern phones. So, AMOLED uses thin film resistors (TFT) to drive the diodes.

A subtype (but not a separate type) of the AMOLED matrix is ​​Super AMOLED (an advertising ploy by Samsung). Its peculiarity is that there is no layer of air between the display sensor layer and the matrix. In IPS, this “trick” was called OGS (One Glass Solution).

It’s worth understanding the main pros and cons in order to objectively compare with IPS.

Advantages

AMOLED is a newer technology compared to IPS. But don’t be confused by the fact that it is considered first, since with the latter everything is not as simple as one might assume. Main advantages of AMOLED:

Flaws

Despite these advantages, there are also disadvantages:

IPS

Production and modernization of screens " i n- p lane s witching" has been going on for 20 years. Again, this technology also has its own history and goes back to the TN+film technology, the essence of which was to twist the crystals into a spiral when receiving an electrical impulse. In IPS, they rotate perpendicular to their standard position.

This feature made it possible to increase the viewing angle almost to the maximum - 178 °. But there are pros and cons here.

Advantages

IPS matrices are considered the best relative to all types of LCD displays due to the following advantages:

• availability. Over its history, the technology has been mastered by many companies, which has made the production of IPS screens relatively cheap. Thus, the price of a matrix for a phone with Full HD resolution starts from $10, which makes them absolutely affordable;
• color transfer. Good calibration of the IPS screen allows you to reproduce color with extreme accuracy. In view of this, monitors for professionals working in the field of design, graphics and photography are produced with IPS matrices;
• unambiguous energy consumption. LCDs that form the image on the display consume small amounts of current. The main consumers are backlight diodes. Because of this, energy consumption is not affected by the displayed picture, but only by the backlight level;
• durability. LCDs practically do not age or wear out, which makes them much more reliable compared to AMOLED technology. LED backlights are subject to degradation, but their service life exceeds 5 years without a noticeable loss of brightness.

Flaws

Even with so much time left for various improvements, IPS technology is not without its drawbacks, including:

conclusions

When answering the question of which is better - AMOLED or IPS, you should understand that the technologies are used for different tasks, where they show maximum efficiency. They also have a different operating principle, and they have their own advantages and disadvantages.