Determining the dimensions of the TV in cm diagonally in inches

Reasons for measuring TV diagonal in inches

There are several factors that explain the widespread measurement of TV diagonals in inches. The main reason is that most models of household appliances are manufactured abroad, where this metric system is adopted.

In the USSR, televisions of the “Berezka 61TTs-311D” brand were produced with a diagonal of 61 cm, which is reflected in the name. Today, Russian TV manufacturing companies use the European metric system when describing the characteristics of their products, which increases the convenience of product selection for users.

Indicating the width and height of a TV screen makes it difficult to represent a specific model, so in order to save money, manufacturers and sellers of household appliances began to indicate the screen diagonal in inches.

What is an inch

In mathematics lessons at school, each person had to learn what an inch is. But not everyone retains this knowledge. The inch is a non-metric unit of length. It was used in different countries and had a different meaning in almost every case. The inch, which is currently used in Russia to indicate data in industry, is an English unit of measurement. Since in electrical stores the technical characteristics of imported products are indicated in inches, manufacturers of domestic devices indicate similar data. This allows customers not to get confused when choosing the right products.

How to measure diagonal

When purchasing a TV, some users measure the screen incorrectly. They consider the display size to be the distance in width from one edge to the other. However, the main parameter is the diagonal, a line drawn from the lower corner to the opposite upper one.

The TV screen is measured without taking into account the frame of the case. Only the matrix needs to be measured.

In addition, in some Chinese models the matrix has a black edge, on which the picture is not displayed when the device is turned on. In most cases, such an area is not covered by a frame, so the model appears larger when turned off.

It is easier to determine the diagonal of a curved screen when using a tape measure. The tool is made of elastic material, so it will not damage the matrix.

Features of choice

Today, TVs with large displays are extremely popular. The demand for such models is increasing every year. Manufacturers are trying to minimize the thickness of the screen frames in order to ensure a completely immersive viewing experience. This design solution also guarantees an increase in usable screen area.

Of course, when comparing TV diagonals, it should be noted that large displays evoke positive emotions among users. The broadcast picture seems to come to life during viewing. However, the distance from the viewing point to the screen, as well as the area of ​​the room, does not always allow you to purchase a large TV. If you are too close to the display, then your eyes simply will not be able to capture the entire image.

The process of choosing a new TV directly depends on the user’s wishes. Firstly, you need to take into account the area of ​​the room in which the new equipment will be located. Secondly, manufacturers offer a wide selection of different screen models: LED, OLED, QLED, LCD. Today no one remembers the CRT TVs that have lost their relevance.

LCD screens remain the preferred option. The modern market offers models with the largest possible diagonal. They are significantly superior to their plasma counterparts. They are not able to reproduce Full HD content if the diagonal is less than 50 inches.

As for LCD models with a small screen, they also should not be written off ahead of time. Firstly, they are much cheaper. Secondly, they take up a minimum of free space and fit harmoniously into the interior of the room. This is an ideal solution for small rooms.

Equipment sales statistics from leading manufacturers indicate that buyers mainly choose 55-inch TVs. However, you need to remember that incorrect placement of a device with a large display will not allow you to fully enjoy watching content.

Considering the above arguments, we can say with confidence that the choice of TV should be approached individually. Be sure to think about exactly what features you are going to use. For example, there is absolutely no need to overpay for 3D, since today there is a problem with a shortage of such content.

As for the choice of diagonal, previously calculations were used to make the correct choice: the display size was multiplied by a factor of 5. However, this option is more suitable for viewing tube TV. The popularization of liquid crystal devices has made certain adjustments to this process. To calculate the diagonal, a completely different formula is used. The screen should be three times smaller than the optimal distance from the viewing point to the TV. For example, if the distance in your room is 3 meters, then you need to buy a 40 diagonal.

Relationship between diagonal and TV size

In addition to the screen diagonal, TVs are characterized by their aspect ratio:

• 4 to 3;
• 16 to 9.

Video displays differently in different formats. On a 4:3 panel, width is to height as 4 to 3. This proportion is gradually being replaced by a more advanced standard - 16:9. In this case, 16 parts of the screen width correspond to 9 parts of the height.

Content reproduced on such a matrix looks as realistic as possible - the real proportions of the image are successfully preserved.

You can figure out how the values ​​of 4:3 or 16:9 are calculated mathematically using the Pythagorean theorem. A simple formula can be used to find the diagonal of a rectangle: √a2+b2. With the 16:9 standard, the equation takes the following form:

• c2 = √162+92;
• c = √337= 18.35.

Here “c” is the screen diagonal. From it you can determine the scaling value - the length of one segment, which divides each side into 16 or 9 sections. For example, you can find out the size of a 40-inch (102 cm) TV:

102/18,35=5,56.

Knowing the size of one segment, it is easy to determine the width of the screen - 5.56 * 16 = 89 cm. The height of a matrix with a diagonal of 40 inches is 5.56 * 9 = 50 cm. The dimensions of the device for the 4:3 format are calculated in a similar way.

Rules for converting inches to cm

TV diagonals in inches and centimeters
You can calculate how many cm are in 1 inch in the diagonal of a TV using the European metric system.

There are 2.54 cm in 1 inch. There are 0.393 inches in 1 centimeter.

If you need to find out the diagonal of the TV in centimeters, you will need to multiply the value in inches by 2.54. For example, a 32” matrix has a size of 81.28 cm (32x2.54). The calculation result is rounded up.

An inch is indicated by a double-dash symbol” (standard quotation marks). To find out the diagonal of the TV in inches, you need to multiply the indicator obtained by measuring the screen with a centimeter tape by 0.393. If the TV diagonal in cm is 81.28, in inches it is 32 (81.28x0.393).

To find out the screen sizes in a certain size, you can use online converters. In order to comfortably watch movies and programs, it is important to choose the correct TV diagonal in cm - the table of values ​​is at the end of the article.

How to choose the TV diagonal to fit the size of the room

As mentioned above, a larger screen diagonal is not always the best choice. The main rule: the image should be clear and not ripple. In addition, you need to take into account the type of screen: plasma or LCD. The pixel size of plasma is much larger, so the distance to the TV for comfortable viewing is much greater.

Attention: if the TV is installed in a niche (furniture or plasterboard), then the actual diagonal size is especially important when choosing a particular model. In addition, the TV should not be placed close to the wall; the device needs constant air circulation from the rear.

For kitchen

It all depends on the room, or more precisely on the size of the kitchen. For a small area, LCD TVs with a small diagonal are ideal. The optimal TV diagonal for the kitchen is from 19 to 24 inches. There are 2 criteria when choosing a TV for the kitchen:

• Viewing angle
• Speaker sound quality

The second criterion is especially important, because in the kitchen they often listen to TV shows rather than watch full-length films.

For bedroom or living room

If we take into account old-style bedrooms and living rooms with an area of ​​20 to 45 square meters, then a TV diagonal of 28 to 32 inches is considered ideal. Everything is determined by the choice of furniture, which allows you to install a TV of exactly this diagonal. The optimal distance to such a TV is 2 meters.

When choosing a TV for the bedroom or living room, it is important to consider the resolution of the TV (4K or Full HD) and the distance to it for comfortable viewing. It is recommended to select the TV diagonal value based on these parameters and, based on the results, determine the price range.

Rules for choosing TV sizes

When purchasing a TV, you should consider the size and resolution of the device’s screen, as well as the required distance to the user. It is important to take into account the dimensions of the room and the placement of spectators.

Distance to screen depending on TV size

Depending on screen format

The widescreen aspect ratio standard 16:9 replaced the analog 4:3 with the advent of digital television. Depending on these indicators, the distance from the audience to the TV panel is selected:

• for devices with a ratio of 4 to 3 - from 3 to 5 diagonals;
• if there is a 16 to 9 format - 2.5-3 diagonals.

Users can comfortably view images on 40-inch widescreen TVs at a distance of 2.5-3 m. If the panel is 55” in size, it is better to view it from 4 meters. In front of a device with a 32” matrix, you should sit at a distance of 2-2.5 m.

Depending on resolution

When choosing a TV panel, it is especially important to pay attention to its resolution. It indicates the number of dots (pixels) placed on the panel. The more there are, the clearer and more realistic the picture.

It is worth distinguishing between the resolution of the TV and the resolution of the signal it reproduces. Signal resolution types:

• DVD – 720x576 or 720x480 pixels. This value is also referred to as 480p.
• HD – 1280x720 (720p).
• FullHD – 1920×1080 (1080p).
• UltraHD or 4k – 3840x2160.

The lower the resolution of the signal transmitted to the panel, the lower quality the picture will be.

If the calculation of the distance from the user to the TV is carried out based on a minimum resolution of 720x576 pixels, then you should focus on the value of the sides of the screen. At higher rates, follow the following recommendations:

• If the video is broadcast in a resolution of 1280x720, the viewer should move 2.3 diagonals away from the panel.
• With a 1920x1080 screen, the minimum distance is 1.56 times the matrix size.
• If the picture has UltraHD resolution, users need to move 0.7 diagonals away from the TV.

Depending on the size of the matrix, the distance to the audience is calculated. For example, for a device with a diagonal of 100 cm and a resolution of 1920x1080 pixels, it is better to position yourself at a distance of 1.56 m from the device. If the model has UltraHD resolution and the diagonal is 120 cm, programs can be viewed from a distance of 86 cm.

Depending on the size of the room

The dimensions of the room play a significant role when choosing the size of the television device. In small rooms it is better to install devices with a small diagonal.

If you incorrectly calculate the area of ​​the room and purchase large equipment, the user will feel discomfort while watching, and his eyes will get tired faster.

Relaxing in front of the TV in this case will not bring complete satisfaction:

• If the distance to the screen is too close, the viewer will see all the defects in the picture, especially with a weak signal.
• With a short distance to the device, users' vision will gradually weaken.
• At a short distance from a large TV, it is difficult to take in the entire screen with your gaze.

Large equipment looks out of place in a room with small dimensions. In a store, choosing the right devices with optimal parameters is quite difficult. Trading areas are large, so the TV panels on the shelves seem small.

Modern TVs are offered in a wide range with diagonals from 26 to 110 inches. In the latter case, the device is a home theater. The screen size should be approximately 3-4 times smaller than the distance to the audience:

• a device with a 40” matrix should be purchased if the sofa is located 1.6 m away from it;
• for 50” the distance is 2.2 m;
• with a screen size of 65” the minimum distance to users should be 2.6 m.

When choosing a TV panel taking into account the size of the room, you should understand that the device will be located at some distance from the wall, and the back of the sofa or chair moves the audience away from the opposite wall.

To determine the dimensions of the panel in advance, it is important to take into account the nature of the content that you plan to watch. For example, if the bulk of it consists of movies, you can choose a device that is slightly larger than the recommended size. Thanks to this solution, users get the feeling of being in a cinema hall.

To frequently watch sports channels and news, you should not purchase large equipment, since a person will miss some of the information without completely covering the image with his gaze.

What to look for when choosing a TV diagonal?

As practice shows, a large TV screen is not always convenient and comfortable. It’s not enough to buy a 102-inch diagonal TV; you need to correctly correlate the size of the display and factors such as:

1. room sizes – for small rooms, 19-20-inch monitors are sufficient;
2. distance from the screen to the viewer - traditionally, the viewing distance is calculated as 3-4 diagonals of the TV;
3. ratio of diagonal to screen resolution - the smaller the diagonal, the lower the resolution and vice versa. If this condition is not met, the picture may disintegrate into individual pixels, which significantly reduces viewing comfort.

Essentially, today there are two options for choosing the optimal screen diagonal. The first is that based on the area of ​​the room, the location of the TV viewer and the operating features (watching news programs, DVD recordings, etc.), the maximum allowable diagonal of the TV is selected. Second, taking into account the desired screen diagonal, the location for installing the TV and the place for viewers is selected. Practice shows that for standard apartments the ideal solution is a TV with a diagonal of 32 - 40 inches.

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Table of TV diagonals (inches and centimeters)

To make it easier to select a TV panel, you should refer to the following data:

Based on the data in the table, you can determine what dimensions the screen has by one parameter. For example, it is easy to find out how much the diagonal of a 90 cm wide TV will be. Judging by the given parameters, it is 41 inches or 104 cm.

The dimensions of TV panels are determined based on the dimensions of the room, the operating characteristics of the equipment (watching movies or programs), and the picture resolution. Knowing the approximate characteristics, you can find a model for the most comfortable viewing.

Review of the 43-inch 4K LCD TV Hyundai H-LED43EU1312 on the Yandex.TV platform

Specifications, delivery set and price

Appearance

The screen is visually frameless; it looks like a monolithic surface, limited at the bottom by a narrow bar, and at the top and sides by a narrow border. The edging is made of plastic with a black glossy surface. The bar is also plastic, but with a silver coating. The legs are similarly plastic with a silver coating. The surfaces of the bar and legs may reflect, which will slightly interfere with watching TV. Having displayed the image on the screen, you can see that in fact there are narrow margins between the outer borders of the screen and the display area itself (from the display area to the outer borders of the screen at the top and sides of 10 mm, and at the bottom - 20 mm). In the center of the front strip there is a logo made of glued plastic letters with a metallized mirror-smooth surface

The outer surface of the matrix is ​​glossy, but when viewed perpendicularly, a slight matte blur of reflected objects is visible. There is no special anti-reflective coating. The screen surface looks black and feels hard to the touch.

The TV looks neat from the back.

The rear panel in the upper part is made of a thin sheet of steel and has a durable matte black finish. The casing protruding back at the bottom and extending to the bottom end is made of black plastic with a matte surface. Interface connectors are located in two open niches. Some of the connectors are directed downward, some to the side. It is inconvenient to reach the connectors from the front, even those directed to the side. Connecting cables to downward-facing connectors is even more difficult. At the top, the TV is relatively thin.

At the bottom end in the center there is an overlay made of transparent tinted plastic. It covers the IR receiver of the remote control and the status indicator. The indicator is bright, as it is an LED in a transparent housing without a matte light diffuser. In standby mode, the indicator glows red, in working mode it glows green, and when receiving commands from the remote control, it blinks from green to red.

On the back cover under the right hand there are seven mechanical buttons with which you can control the TV to a limited extent without a remote control.

The standard stand consists of two plastic legs with a tick, which are attached to the bottom end with screws. The legs rest on anti-slip pads made of elastic plastic. The rigidity of the structure corresponds to the weight of the TV. The TV stands stable, without any visible tilt. The distance between the extreme points of the legs is 863 mm.

There are ventilation grilles on the plastic casing at the back, top and bottom. Behind the grille at the bottom end you can see a pair of loudspeakers with elongated diffusers.

The TV and everything for it are packed in a modestly decorated box made of corrugated cardboard.

For carrying, the box has slotted side handles.

Switching

The power cable is non-detachable, its length is 1.55 m.

The table with characteristics at the beginning of the article gives an idea of ​​​​the communication capabilities of the TV. Most connectors are full-size and placed more or less freely. An exception is the connector for input of a component video signal in analog form, which is a socket for a four-pin minijack. The corresponding adapter for three RCAs is not included in the package. Of all the possible HDMI control functions, only one works: the player connected via HDMI turns off when the TV is turned off. You can connect external speakers or headphones, as well as a mouse and keyboard to the TV via Bluetooth.

Remote control and other control methods

The remote control body is made of black plastic with a matte surface. The button labels are quite contrasting and large. There are few buttons themselves, but the organization of the interface and not very rich functional equipment do not give much reason to regret the lack of additional buttons. The remote control is hybrid, it can work both via IR and Bluetooth. The indicator on the front of the remote control blinks red in the first case and green in the second. The IR remote control works before pairing with the TV or when the TV is in standby mode or in deep sleep. In all other cases, the IR transmitter does not work and commands are transmitted via Bluetooth. There is a microphone hole on the front of the remote control next to the indicator.

The remote control does not have coordinate input functions, such as a gyroscopic mouse. The limited capabilities of the remote control in the case of such a “smart” TV can be compensated by connecting a real keyboard and mouse to the TV. These input devices (like drives) work over USB even through a USB hub, freeing up scarce USB ports for other tasks. Scrolling with the wheel is supported, and the right mouse button is cancel/redo, which is very convenient. The delay in moving the mouse cursor relative to the movement of the mouse itself is small. For a connected keyboard, by default the layout cannot be switched using a hot key combination, but you can install and configure a third-party application to quickly change layouts. Some shortcut keys from the main and additional set are supported (for example, back/cancel, go to the main page, call up contextual settings, adjust volume, stop/play, next/previous track or file, switch between recently running programs). It should be noted that, in general, the standard interface of the TV itself is well optimized for using only the included remote control, so connecting a keyboard and mouse, in general, is not necessary, but you may have to for comfortable work in the browser and other third-party programs.

Yandex.TV platform

This TV runs on the Yandex.TV platform, based in this case on Android version 9. It is assumed that Yandex.TV will be installed mainly on inexpensive smart TVs. In principle, you don’t have to connect this TV to the Internet and you don’t have to log into your Yandex account on it, but then the Yandex.TV platform will be of no use. So we'll connect and log in.

The Yandex.TV developers wisely decided not to overwhelm the viewer with any sophisticated and sophisticated interfaces. As a result, the Yandex.TV home page resembles the familiar YouTube interface in the version for Smart TV, and the settings menu remains in its original form for Android TV.

Conveniently, the menu with settings is called up directly in any operating mode of the TV by pressing the button dedicated for this on the remote control. The menu on the home page allows you to go to entering a search query, to a list of television channels, among which there will be satellite, cable and terrestrial, as well as Internet television channels, for which you do not need an antenna to watch.

The Movies, TV Series, Bloggers and Cartoons items allow you to select relevant content, further divided into categories.

And if you stay on the main page, the user will see a list of recently used applications, and a very long list of recommended content, also divided into categories. At the bottom of the home page there are icons for displaying brief help on working with Alice, for going to work with accounts, for displaying a list of applications, and for going to settings.

If we exclude system ones, then only three applications are preinstalled on the TV. This is a utility for enabling the screen mirroring mode of a mobile device, KinoPoisk HD and File Manager (aka media player).

There is not even an explicit YouTube application, there is only a link to the web version for Smart TV. There is also no app store. However, the user is offered a list of direct links that allow them to install several popular applications. Also, applications, including third-party stores, can be installed from APK files. These files, like, for example, movies, photos and music, can be recorded on a USB drive and then installed or played on the TV using the already installed File Manager. However, the concept of the Yandex.TV platform assumes that the user will receive all the content he needs directly from the TV home page, using Alice as an adviser if necessary, and therefore there is no particular need to use third-party applications.

In the case of Yandex.TV, there is completely free content, but there is not very much of it; much more interesting content appears if the viewer at least subscribes to Yandex.Plus. The base price for this subscription is 199 rubles per month. Buyers of a TV with the Yandex.TV platform are given a free opportunity to evaluate the benefits of a Yandex.Plus subscription for three months.

In fact, there are several options for Yandex subscriptions, the most expensive is Yandex.Plus Multi with Amediateka, the base price of which is already 649 rubles per month, but, as the name suggests, content from Amediateka and a number of other services is available for free. However, there will still be some restrictions, as well as paid content. Of course, there are ways to watch movies and TV series for free, but when using paid services, the user pays for convenience and saving his time, which, as we know, is priceless. It is worth mentioning the support of those who produce the content. Of course, if the buyer of a TV with Yandex.TV is ultimately not tempted by paid subscriptions, he will still have convenient access to free content, as well as the TV itself with almost full-fledged Android TV and Alice to boot.

Alice in this TV listens to the user only when he presses and holds the button with the microphone icon on the remote control. There is no other way to activate the voice assistant. You can ask Alice to find a movie or TV series by title, movies with a specific actor, etc.

"Show me back to the future"

She can switch to a television channel by its name, including over-the-air channels. Alice can also answer some questions.

“Where should I go to relax in the summer?”

If smart devices are linked to your Yandex account, then with the help of Alice you can control them by speaking commands into the TV remote control. Note that Alice in Yandex.TV has fewer skills compared to Alice in smart speakers or in a mobile application. For example, she does not know how to play music or tell stories. As we have learned, the developers are working to correct this situation.

"Tell me a story"

Also, Alice practically does not know how to control the TV directly. We found only commands for changing the volume (“Louder” and “Queterer”, in 5% increments), and that’s all.

Let's summarize. TVs with Yandex.TV provide subscribers to Yandex services with convenient access to a wide variety of content. And those who are wondering whether to pay for films and TV series can appreciate the benefits of a Yandex.Plus subscription for three months of free use. Alice, who lives in these TVs, will help you find the right content, answer pressing questions and transmit user commands to Yandex smart home devices.

Playing multimedia content

The hardware configuration is explained by data from the CPU-Z program:

The TV is switched to shallow sleep mode by briefly pressing the power button. From this mode, the TV wakes up very quickly - in about 5 seconds. Long pressing the power button (and selecting Power Off in the menu that appears) or a power outage puts the TV into deep sleep mode. When turned on from this state, the system restarts again, and this already takes much longer, approximately 36 seconds.

In Miracast mode, you can transfer a copy of the mobile device screen and sound to your TV via Wi-Fi. In principle, in the case of a sufficiently powerful device, you can get video output of satisfactory quality. For example, when connected to a Xiaomi Mi Pad 4 tablet, it was possible to obtain an output of 60 fps with rare skipping of single frames. There is desynchronization of sound and image, but it is insignificant.

Built-in applications cannot boast of special functionality and convenience, so you can install and subsequently use third-party programs preferred by the user. For example, we installed MX Player and VLC for Android to play video files, and ES Explorer to access the file system, network resources, etc.

In our superficial testing of multimedia content playback, we limited ourselves to a number of files launched mainly from external USB drives. Sources of multimedia content, for example, when using the VLC for Android program, can also be UPnP (DLNA) servers and SMB servers. We tested hard drives, external SSDs and regular flash drives. The two tested hard drives worked without problems from any of the two USB ports without additional power, and in the standby mode of the TV itself or after a certain period of inactivity, the hard drives turned off. Note that the TV supports reading USB drives with FAT32 and NTFS file systems, exFAT is not supported, and there were no problems with Cyrillic names of files and folders. The TV player detects all files in folders, even if there are a lot of files on the disk (more than 100 thousand).

There is little point in testing the playback of audio files using the built-in player, since there will definitely be a third-party program that can handle this well and in a way that is convenient for the user. In the case of raster graphics files, the capabilities of the built-in player are worth discussing, since only it can play these files in the true resolution of 3840x2160. All third-party programs, like the OS itself, display a static image in a resolution of 1920x1080. However, both the built-in player and third-party programs can output video in true 3840x2160 resolution using hardware decoding. Also, a number of video streaming programs, such as YouTube, can output 4K video.

We have confirmed the ability of the TV's built-in player to display raster graphics files in JPEG, GIF, PNG, MPO (one angle) and BMP formats, including in the form of a slide show.

The brightness and color clarity when displaying images on the screen are high and correspond to 4K resolution.

Testing of video file playback was carried out mainly using the MX Player. Hardware decoding of audio tracks in at least AAC, AC3, MP2, MP3 and PCM formats is supported; DTS and WMA tracks - software only. Most of the modern high-definition files we tested played back without problems in hardware decoding mode, up to H.265 variants with 4K resolution at 60 fps. In MX Player you can watch copies of Blu-ray discs, but only by file, and in places with high bitrates there may be stuttering. However, you can still switch between audio tracks and subtitles, even if there are a lot of them. Playback of HDR video files is supported (HDR10 and HLG, MP4, TS, WebM and MKV containers, AV1, VP9 and H.265 codecs), and in the case of files with 10 bits per color, according to visual assessment, there are more shade gradations than 8- bit files.

Rarely, but there were video files with which the TV had problems. For example, DivX 3 files in AVI container, DivX 5 (MPEG4 ASP) files in AVI, DIVX, MKV and OGM containers were not played in hardware decoding mode. Also VCD MPEG1, MPEG2 SVCD/KVCD files were not enlarged to the nearest edges of the screen, but MPEG2 [email protected] with 720p/1080p resolution played back fine.

Test videos to determine the uniformity of frame alternation helped to reveal that when playing video files, the TV does not adjust the screen refresh rate (it is always 60 Hz) to the frame rate in the video file. By adjusting the brightness and contrast, you can ensure that all shade gradations are displayed in the standard video range (16–235). The maximum bitrate of video files, at which there were no artifacts yet, when playing from USB media was 250 Mbit/s (H.264, https://jell.yfish.us/), over a wired Ethernet network - 70 Mbit/s, and via Wi-Fi (network in the 5 GHz range) - 200 Mbit/s. In the last two cases, the media server of the Asus RT-AC68U router was used. Statistics on the router show that over Wi-Fi the reception and transmission speed is 866.7 Mbit/s, that is, the TV has an 802.11ac adapter installed. The iPerf3 test (default settings, the server is connected to the router via 1 Gbps Ethernet) showed that the average speed over Ethernet is 90 Mbps, and over Wi-Fi - 200 Mbps.

Sound

The volume of the built-in speaker system for a living room corresponding to the size of a given screen diagonal is sufficient. The stereo effect is difficult, but can be recognized. There are high and medium frequencies, practically no low ones. There are clearly parasitic resonances of the housing. In general, even for the class of acoustics built into a TV, its quality is average. Let's compare the frequency response of this TV with the frequency response of two high-class TVs (obtained using a sound level meter when playing an audio file with pink noise, SPL interval in 1/3 octaves):

It can be seen that this TV does not have the lowest frequencies, and the middle of the range is protruding. The volume is relatively high (83 dBA for pink noise).

When you connect headphones, the built-in speakers are muted. There is no volume reserve when using 32 Ohm headphones with a sensitivity of 92 dB, there is no noise in pauses, the lowest frequencies are clearly not enough, the stereo effect is clearly expressed, the sound is harsh and a high amplitude signal leads to overloads of the audio path, the overall sound quality is average.

Please note that when connecting external speakers via Bluetooth, the built-in speakers are not disabled. This shouldn't happen, of course.

Working with video sources

Cinema operating modes were tested when connected to a Sony BDP-S300 Blu-ray player. An HDMI connection was used. The TV supports 480i/p, 576i/p, 720p, 1080i and 1080p modes at 24/50/60 Hz. The colors are correct, given the type of video signal, luminance clarity is high, but color clarity is reduced. In the standard video range (16-235) all shade gradations are displayed (but you need to adjust the brightness and contrast settings). In the case of 1080p mode at 24 fps, frames are output with a 2:3 interleaved duration.

In most cases, the TV does a good job of converting interlaced video signals into progressive images, even with the most intricate interleaving of half-frames (fields). When scaling from low resolutions and even in the case of interlaced signals and dynamic images, partial smoothing of object boundaries is performed. The video noise reduction function also works well, without leading to significant artifacts in the case of dynamic images.

When connected to a computer via HDMI, we received image output in a resolution of 3840 by 2160 pixels with a frame rate of up to 60 Hz inclusive. With this connection, the TV adjusts the screen refresh rate, but only to 50 or 60 Hz, so in the case of a signal with 24 fps, the frames are also output with a 2:3 alternating duration. Scaling to the resolution of the TV matrix (if necessary) is performed with acceptable quality. In the case of a 4K signal with native color clarity (output in RGB mode or a component signal with 4:4:4 color encoding), the actual image cannot be output to a TV screen without reducing color clarity both horizontally and vertically. Note that in this TV the built-in function of geometric transformation (changing the output format) does not actually work - the option of automatically selecting the desired mode is always selected. But at least when switching to PC mode, the slight zoom with edge cropping is turned off.

Under Windows 10, output in HDR mode to this TV is possible by selecting the appropriate options in the display settings. At a resolution of 4K and 50/60 Hz, the output is in 8 bits per color mode, supplemented by dynamic color mixing, apparently using a video card at the hardware level. At 30 Hz - 12 bits per color (dynamic expansion to 10 bits is performed by the TV itself). Playing test videos with 10-bit color and smooth gradients showed that the noticeability of transitions between shades was much less noticeable than with simple 8-bit output without HDR. Colors in HDR content are close to expected, although a little on the pale side. The maximum brightness in HDR mode is the same as in SDR mode, and the color gamut is not wide (see below), so HDR support is nominal, but it is still there.

TV tuner

This model, in addition to the satellite tuner, is equipped with a tuner that receives analog and digital signals from broadcast and cable broadcasts. The quality of reception of digital channels on a decimeter antenna mounted on the wall of the building (almost direct visibility in the direction of the TV tower in Butovo, located 14 km away) was at a high level - we were able to find TV channels in three multiplexes without any problems.

Note that the TV does not have advanced functions to improve image quality, so the picture of channels in SD quality looks extremely unattractive. There is basic support for the electronic program guide - you can see exactly what is on or will be on the current and other channels and read a brief description.

Microphotographs of the matrix

The identified screen characteristics suggest that this TV has an IPS matrix. Microphotographs do not contradict this (the black dots are dust on the camera sensor):

Subpixels of three colors (red, green and blue) are divided into two approximately equal areas with different domain orientations. Such a complex device is, in principle, capable of providing good viewing angles.

As the brightness of the output hue decreases, the brightness of some subpixels decreases greatly. For example, this is what a dark blue-green and dark red field looks like at not very high magnification:

Dark blue-green field

Dark red field

As a result, if you sit at a distance at which 4K resolution differs from Full HD, many shades look “loose” with a visible mesh structure. If you sit further away, this grid is not visible, but the advantage from 4K resolution almost disappears.

Note that there is no visible “crystalline effect” (microscopic variation in brightness and hue) in this case.

Brightness and power consumption measurements

Brightness measurements were taken at 25 screen points located in increments of 1/6 of the screen width and height (screen borders not included). Contrast was calculated as the ratio of the brightness of the white and black fields at the measured points.

Hardware measurements showed that the contrast for this type of matrix is ​​typical. The uniformity of white and black fields is low, but the uniformity of contrast is good. Apparently, the unevenness is mainly due to the unevenness of the backlight. On the black field you can see the variation in illumination over the screen area:

The table below shows the brightness of the white field in the entire screen when measured in the center of the screen and the power consumption (no USB devices connected, sound off, Wi-Fi active, settings values ​​​​provide maximum brightness):

In standby mode, consumption is about 0.5 W. In deep sleep mode, consumption for some reason increases to 1.6 W.

At maximum brightness, the image will not appear faded in the case of a typical artificially lit living room, but there is no brightness reserve at all. Conversely, for conditions of complete darkness, the minimum brightness may be too high.

At any brightness level, there is no significant backlight modulation, so there is no screen flicker. As proof, here are graphs of brightness (vertical axis) versus time (horizontal axis) for different Backlight settings:

The heating of the TV can be assessed from the following image from an IR camera, obtained after long-term operation at maximum brightness in a room with a temperature of approximately 24 °C:

Front heating

Judging by the distribution of heating areas, this TV uses backlighting that is not divided into independently controlled zones.

Determining response time and output latency

The response time for the black-white-black transition is 17 ms (9 ms on + 8 ms off). Transitions between semitones occur on average in 18 ms in total. There is a very weak “overclocking” of the matrix, which does not lead to visible artifacts - there are barely detectable emissions at the on and off fronts in the case of some transitions.

In general, from our point of view, this matrix speed is quite enough for playing not very dynamic games.

For a clear idea of ​​what such a matrix speed means in practice and what overclocking artifacts may be, we present a picture taken using a moving camera. Such pictures show what a person sees if he follows an object moving on the screen with his eyes. The description of the test is given here, the page with the test itself is here. Recommended settings were used (motion speed 960 pixels/s), shutter speed 1/15 s.

The clarity in motion is low, there are no visible artifacts from overclocking.

Let's try to imagine what would happen in the case of a matrix with instant pixel switching. For it, at 60 Hz, an object with a movement speed of 960 pixels/s is blurred by 16 pixels. Blurred as the focus moves at the specified speed and the subject remains stationary for 1/60 of a second. To illustrate this, let's simulate a blur of 16 pixels:

It can be seen that the clarity of the moving image on this TV is noticeably lower than in the case of an ideal matrix.

We determined the total output delay from switching video buffer pages to the start of displaying the image on the screen. As a result, when connected via HDMI, the image output delay in the case of a signal of 3840×2160 and 60 Hz was about 48 ms. This delay is felt when using a TV as a monitor for working on a PC, and for dynamic games it is even more significant.

Color rendering quality assessment

To assess the nature of the increase in brightness on the gray scale, we measured the brightness of 17 shades of gray at different values ​​of the Gamma parameter. The graph below shows the obtained gamma curves (the values ​​of the approximating function indicators are given in parentheses in the captions, and the coefficient of determination is also there):

The actual gamma curve is closer to standard in the case of the Medium option, so we next measured the brightness of 256 shades of gray (from 0, 0, 0 to 255, 255, 255) at this value (lowering the Contrast setting to 49 so that there were no highlights off by one shade). The graph below shows the increase (not absolute value!) in brightness between adjacent halftones:

The increase in brightness is more or less uniform, and almost every next shade is significantly brighter than the previous one, even in the darkest area:

The approximation of the resulting gamma curve gave a value of 2.20, which is exactly equal to the standard value of 2.2. However, the real gamma curve noticeably deviates from the approximating power function:

To assess the quality of color rendering, we used the i1Pro 2 spectrophotometer and the Argyll CMS software package (1.5.0).

Color gamut is close to sRGB:

Below is the spectrum for the white field (white line), superimposed on the spectra of the red, green and blue fields (lines of the corresponding colors):

This spectrum with a relatively narrow peak of blue and wide humps of green and red is typical for monitors that use white LED backlighting with a blue emitter and a yellow phosphor.

The graphs below show the color temperature at various parts of the gray scale and the deviation from the blackbody spectrum (ΔE parameter) when choosing the Normal (brightest mode) option for the Color Temperature setting and after correcting the color balance with the gain settings of the three primary colors (values ​​0, −47 and −51 to enhance red, green and blue):

The range closest to black can be ignored, since color rendering in it is not so important, and the error in measuring color characteristics is high. Manual correction reduced ΔE to an acceptable value and brought the color temperature closer to the standard 6500 K, while both parameters change little from hue to hue on a significant part of the gray scale - this has a positive effect on the visual assessment of color balance. However, this correction reduced the maximum brightness to 134 cd/m², and the contrast decreased accordingly.

Measuring viewing angles

To find out how screen brightness changes when deviated from perpendicular to the screen, we took a series of measurements of black, white and grayscale brightness at the center of the screen over a wide range of angles, deflecting the sensor axis in the vertical, horizontal and diagonal directions.

Reducing brightness by 50% of maximum value:

In terms of the speed of brightness decrease, viewing angles are not the worst. When deviating in the diagonal direction, the brightness of the black field begins to increase sharply already at 20°-30° deviation from the perpendicular to the screen. If you sit not very far from the screen, then the black field in the corners will be noticeably lighter than in the center, but remain relatively neutral gray. Contrast over an angle range of ±82° in the case of diagonal deviation in one direction drops below 10:1 at −78°.

To quantify the change in color rendering, we performed colorimetric measurements for white, gray (127, 127, 127), red, green and blue, as well as light red, light green and light blue fields in the full screen using a setup similar to that , which was used in the previous test. Measurements were carried out in the angle range from 0° (the sensor is directed perpendicular to the screen) to 80° in steps of 5°. The obtained intensity values ​​were recalculated into deviation ΔE relative to the measurement of each field at a perpendicular position of the sensor relative to the screen. The results are presented below:

You can choose a deviation of 45° as a reference point. A criterion for maintaining correct colors can be considered a ΔE value of less than 3. Color stability is generally good (although it can be better), this is one of the main advantages of an IPS matrix.

conclusions

The main feature of the Hyundai H-LED43EU1312 TV is that it runs on the Yandex.TV platform with an integrated voice assistant Alice. The platform provides convenient access to free and paid (subscription and one-time fee) content. The Android system is not very deeply hidden under Yandex.TV, so the user, if desired, can install almost any third-party software that best suits his needs and personal preferences. Below are the lists:

Advantages:

• No backlight flickering
• Supports HDR signal and HDR content
• Good quality of reception of digital terrestrial TV programs
• The remote control works via Bluetooth and IR
• Dual-band Wi-Fi
• Convenient menu

Flaws:

• Halftone grid visible at close range
• Variation of frame duration in case of signal or files with 24 fps
• Low maximum brightness (196 cd/m²)
• Minimum brightness is high (77 cd/m²)
• When connecting external speakers via Bluetooth, the built-in speakers do not turn off

In conclusion, we suggest watching our video review of the Hyundai H-LED43EU1312 TV:

Our video review of the Hyundai H-LED43EU1312 TV can also be viewed on iXBT.video

Convert inches to centimeters

If you want to know how many centimeters diagonally there will be on a TV display with a value of 32″, multiply the number 32 by 2.54 and get the value in centimeters - 81.28. The result is always rounded up.

And if you do not have the opportunity or desire to use a calculator, then you can find out the value from a special table:

Varied size

It is not at all difficult to calculate the size of a television or computer monitor in inches. The screen height is multiplied by 2, double the width is added, and the diagonal is measured in the resulting rectangle. But this is not the answer to the question of how many cm the TV occupies, what its overall height is and what parameters it has in length.

Rules and regulations

There is a frame that surrounds the monitor if it is a computer or laptop, and the TV and its screen have a frame provided by the manufacturer. In addition there is a leg. These device accessories also include the concepts of height and width, which the average consumer needs to fit the purchased device, TV or personal computer, into an equipped niche or computer desk.

Sometimes it seems that measuring a monitor diagonally was invented not by well-known electronics brands, but by lazy salespeople. Let's note some points:

1. Remembering the distance from one lower corner to the other upper (in this case, the diagonal of the monitor is 24″) is much easier than telling the buyer that the width and length of the device are two specific numbers, and the same parameters of its screen are smaller and equal to two more digital indicators . The same thing would happen when buying a computer or laptop. Otherwise, you can simply call one indicator – 24″ or indicate any other variable value.
2. 24″ is a specific device size, usually demanded by homeowners who have large kitchens. In small apartments, it is extremely rare to install a 24-inch TV (monitor) in the kitchen. Equipment with monitors from 19 to 22 inches is more in demand there. It gives a relatively normal view for viewing content, appropriate only in this limited space. The parameter is 19–22 inches, 24″ or more - depends on the footage of the utility room. But if you install such a device in a spacious room in order to see the image from the far corner, such a device is not enough.

Installation height

A personal computer 61 cm diagonally is a relative norm. However, for those who constantly work behind it, sometimes this size is not enough. But how many inches are needed for a laptop monitor to be optimal for the owner is decided depending on the purposes for which it is used.