The optimal distance that is suitable to comfortably watch Full HD or UHD is based on a different principle. Based on the manufacturer’s recommendations, you can calculate the distance as follows: for Full HD, for viewing in complete safety, the display diagonal is multiplied by 1.6, and for UHD. by 0.8.
Distance table depending on the diagonal of the TV receiver.
|Diagonal size in inches||Full HD, up to TV screen, m||UHD, up to TV screen, m|
In this case, the need for a distance of 3 m or more is needed only with a large monitor size. The advantage of new technologies lies in wider possibilities of using the premises, without being dependent on distance. Now even a children’s room can become a place for a TV receiver, it all depends on how to choose the right viewing angle, the necessary gaming gadgets, take into account the distance from the floor to the TV on the wall, if it is placed there.
Television does not always broadcast a quality picture. In 4K, you need an app and additional accessories to get high-quality content, otherwise the software will correct the imperfections of the map, and if you sit too close, you may see a blurry image. The same rule applies when zooming in for a photo. How many pixels are needed to maintain a normal image?
For everyday use and extended viewing, manufacturers recommend choosing high-definition TVs. They, even with a relatively small diagonal, allow the viewer not to depend on the distance. With such devices, you can afford to sit closer, expand the possible viewing angle and even activate the peripheral vision that is important for a person to the maximum extent.
See below useful information on this topic.
Plasma LCD and LED TVs
Until recently, they were recommended as the newest and most technologically advanced models in the world of television production. However, if you carefully read the instructions of manufacturers and doctors, then you can calculate the approximate distance here according to the same principle: both of them recommend choosing the required value when purchasing, multiplying the diagonal by 5. The optimal viewing distance is selected by the formula:
- D is the length of the diagonal;
- L. the required distance to the diagonal of the TV;
- K is a special coefficient, the meaning of which is clear to specialists and has a value from 3 to 6, depending on how the TV diagonal should be located, whether the maximum or minimum allowable range is needed.
According to this formula, the MDD (the minimum length at which the viewer should be to the screen), with D (diagonal parameters) 70-80 inches (and 65 too), should be 5 m. Choose the ratio of the diagonal to the location of the device and furniture, where the viewer will sit, much easier than making the choice of the diagonal of the TV, and then trying to attach it depending on the number of required meters.
A common misconception when thinking about how to choose the size of a TV is that the diagonal size of the screen determines good visualization and there is a direct connection between them. However, even on the screens of smartphones and laptops, the image is clearer. You can only achieve the desired viewing angle by fixing a fixed distance to a relatively large screen (43 or 49 inches) or by reducing the distance to TV receivers. But in this case, even with guaranteed security, it is important to consider the number of pixels.
What is the best distance to watch 4K TV
4K is an abbreviation for 4K resolution in digital cinema and computer graphics. To obtain a high-quality image, the optimal aspect ratio of TV, monitor and projector in the 16: 9 aspect ratio.
- Fans of new technologies convince the average consumer that the resolution of the standardized scan at 3840×2160 pixels allows you to watch a higher scan (4096×2160), while providing impressive differences in clarity, sharpness, color reproduction and even contrast.
- They also assure that as compensation for expensive cables and ports with increased bandwidth, 4K TV can be watched from almost any distance, and the selection of dimensions here should be done only taking into account the room. In fact, in this case, the calculation of the required size of the diagonal is carried out only taking into account the optimal distance.
- The problem of choosing from what distance it is better to look at the image is precisely the multi-pixel. For a large screen or monitor, 2.7-3 meters is recommended. But, according to experts, in this case the human eye does not see all the subtleties provided. If the distance from the screen to the viewer is less than the prescribed distance, 4K will clearly demonstrate the pixels, but will not give the desired picture clarity.
- Therefore, it is believed that a table will help to determine the necessary distance, which is difficult for an uninitiated person to understand. Meanwhile, most buyers of new models are trying to calculate a safe distance, and at the same time, a high-quality image is not the most important for them.
Calculation of the ratio between the screen diagonal and the distance from the intended place of viewing the TV. this is what determines the health of the eyes and the quality of the picture on the screen. If we take into account only the resolution of the TV receiver, and do not care about the health of human eyes, then the novelty and manufacturability of the device will not be appreciated.
At what distance to watch TV: table of optimal values
The distance to the TV, depending on the diagonal, is certainly an optimal parameter to be taken into account, which must be determined responsibly. Physicians have long been concerned about the problem of the influence of a television screen on vision. Nevertheless, the practice of calculating the distance from TV depending on its diagonal is still not widespread.
The overwhelming majority of people, starting from middle age, spend most of their free time watching TV and movies. This is quite understandable, given today’s realities. every home has a TV (despite the claim that computers are replacing it).
CRT, or CRT TVs, are a type of standard device for watching TV programs, in which the required distance practically did not depend on the size of the screen. The required distance to the TV is also calculated from the diagonal size. It is quite SIMple to determine it by measuring the distance from the TV to the eyes (approximately at the place where the viewer will sit), and then divide by 5.
Naturally, a distance of 2 meters will give a figure of 40 centimeters, and if you divide this figure by 2.54 (the value of an inch in centimeters), you get about 16 inches. If the diagonal is 32 inches, then there should be 4 meters from the TV. The last CRT in these TV models, with a large screen, was released in 2014. This is due not so much to its shortcomings (of which there are relatively few), but to fire hazard and harmful radiation.
Determine the diagonal taking into account the size of the room
To correctly determine at what distance to watch TV, you must first of all proceed from which type of TV is selected. With the existing variety of models, it is difficult for an incompetent person to understand matrices, resolutions and other wisdom.
The main thing here is to asSIMilate one immutable truth. the larger the diagonal you select, the further you will have to sit from the screen. And the main thing here is not the quality of the image transmitted from the antenna, but the ability of human vision to perceive the image.
If someone tried to enlarge a picture from a mobile phone, a strong increase (zoom in) leads to the disintegration into blurry spots, and no gadgets and cars will save the photo, and mobile tariffs are not to blame for this. It all depends on where the screen is. Sometimes the image is blurry up close, but if you look at it from a distance, everything will be clearly visible on it.
Therefore, before giving preference to a huge screen, you should measure the room where the new device will be lovingly installed.
The standard requirement for distance from a 55-inch screen is 4.5 m. If the size of the room allows it to withstand it, everything is fine. If you choose a TV with a 32-inch screen, you will need to watch it from a distance of 2.5 m.Correctly selected technical characteristics will make the image clearer and more beautiful than a TV receiver with a large screen, but with worse matrix characteristics.
You can follow a different principle and calculate the diagonal using the proposed formula. measure the distance from the viewing location to the intended location of the purchase. The length will turn out in cm, but you need to divide it by 5, and then by 2.54 (inch), and you will get the optimal size of the diagonal, which you can set and look without prejudice to your own vision.
Specification Based Recommendations
The calculation of the distance between the TV and the eyes is made correctly taking into account several more parameters: the quality of the matrix, the declared resolution of the TV, contrast and screen formatting.
At what distance to watch TV?
The choice of modern TVs pleases even the most demanding consumers, the range is really amazing. And the number of selection options is also impressive. However, many people who buy a TV do not take into account the fact that they need to watch it from a certain distance. In order for watching your favorite TV programs not turn into a trip to an optometrist, you need to know at what distance you can watch a specific TV model. However, you need to understand that if your room is small, but you want to install a plasma panel on the entire wall, then nothing good will come of this venture.
Cathode ray tube television
LCD, LED and Plasma TVs
LCD (liquid crystal) and plasma televisions are considered the safest. When viewing them, flickering does not harm the eyes, because it is completely absent. The safe distance to LCD TVs can be arbitrary, they do not have harmful radiation, so you can watch them from any distance convenient for you. The safe distance to TVs from the LED series is no different. You can also watch such TV without fear of harmful radiation and flicker, which damages your eyesight.
As you may have already understood, the optimal viewing distance for a TV directly depends on its model. After all, if you have an LCD or LED TV at home, then the picture will be as clear as possible from any distance and from any angle.
But whatever your TV, you should know that if you sit right in front of the screen, nothing good will come of it. The safest distance for watching programs on any TV is considered to be equal to its four diagonals, which is usually about two meters. This opinion was reached by Western scientists after a series of experiments with volunteers. Despite the fact that these requirements are mainly addressed to older models of televisions with a ray tube, you should still not neglect your eyesight by watching TV programs too close to the screen.
The empirical formula for calculating the exact distance for viewing this type of TV is given in the table:
3D TV: distance calculation
Today you can watch movies in 3D without leaving your home. In order to fully immerse yourself in the events taking place on the screen, it is recommended not to sit far from the TV, but will it not damage your eyesight? Experts assure that watching films in 3D does not harm a person’s eyesight at all. The optimal distance to the 3D TV screen is three meters, and the recommended angle of the TV should be within 60 °. If you follow these recommendations, the effects from viewing in 3D will be as close as possible to what you might see in a movie theater. Be sure to consider the quality (resolution) of the material. If the resolution is up to 720p, then you should be at a distance of three meters from the screen, and if it is equal to 1080p, then the most comfortable distance is about two meters.
precise information is given in the table:
Whatever your TV model, try to avoid watching TV programs from a distance of less than two meters from your eyes to the screen. If you do not adhere to this recommendation, then your vision will be subjected to unnecessary stress.
In the living room, the owners receive friends, relatives, and celebrate family holidays. In short, it is here that people spend more time, which means they watch TV from different angles: from behind a desk, from armchairs, from a sofa or at a dining table. Conventionally, the optimal point in the middle of the screen is at a distance of 70 to 175 cm from the floor, and in most cases at a height of 1.2 to 1.4 m.
What should be considered first of all, in order to understand at what height to hang the TV in the living room:
- from what place will TV be watched most often: from the table or from the sofa;
- average height of all family members.
If in the vast majority of cases you plan to watch movies or TV shows while sitting on the couch, then the height should be lower, if from the table, then higher. Doctors recommend the following.
- The head should not be tilted forward or backward, this provokes unnecessary stress on the cervical regions.
- The distance from the eyes to the screen should be proportional to the diagonal of the monitor. The established standard is 1: 2 (3), that is, if the monitor size is 100 cm, then the distance should vary in the range from 200 to 300 cm for LCD panels, for conventional TVs 25% more.
One should not overlook the fact that television can have a negative effect on vision for both adults and children. The viewing process also involves the cervical spine. Therefore, expert advice on the recommended eye-to-screen distance should be taken into account.
Often the answer to the question is found by itself when the panel is placed in a special niche in the furniture. This is not always correct: with this arrangement, the height of the TV may be lower / higher than necessary if the level of the sofa does not correspond to the standard, plus it is important to take into account your own height. It will not be superfluous to experience for yourself how comfortable this height will be. If there is discomfort, then the location should be adjusted.
TV in the kitchen
A good placement option within the kitchen is selected based on its area and purpose. If the room is small, it is likely used for one or two people to cook and eat. Here the device often serves as a background. A spacious kitchen can include a dining area, a sofa, a curbstone, which allows you to watch programs for a long time.
There are three optimal places: on the bedside table; on a wall when the height of the center of the TV is between 1.2 m and 1.5 m from the floor; over the refrigerator. Can I put the TV directly on the refrigerator? This neighborhood has certain nuances. It is also important to note:
- the panel is not hung next to the stove, oven or water sources;
- the center of the monitor should be located opposite the eyes when standing, when prolonged viewing is not meant, or from a sitting position, if the kitchen is equipped and designed for relaxation;
- sunlight from windows creates glare and reflections on the screen, this should be eliminated with roller blinds or thick textile curtains, location.
Do not forget about your own preferences or habits. Such subjective problems cannot be solved based only on what experts and electronics manufacturers recommend. The height of the TV is always adjusted based on the most frequent viewing places, the height of the person, and comfortable positions.
Optimal TV Installation Height
The installation height of the TV can be somewhat difficult. Often the opinions of family members differ, or the owner himself is lost among two or three options. In reality, there are no strict requirements and rules in this regard, but there are a number of useful recommendations based on medical research and technical features of devices. It does not matter how many TVs in your house, it is important in which room you plan to install them: in the bedroom, kitchen, living room. Based on the purpose of the premises, you can begin to calculate the ideal location for the panel.
Methods for determining the height from floor to TV panel
Having previously determined the place on the wall, you can start choosing the height of the mount relative to the floor. You can choose the place for mounting the bracket, focusing on the feeling of comfort and aesthetics, or relying on mathematical calculations.
The location is determined in direct proportion to the diagonal of the TV screen and the distance to the device. The larger the TV panel, the longer must be the distance to the viewing locations, including the height relative to the floor.
Farther away from the large screen, the viewing angle narrows. The completeness of the survey is influenced by the interior items, which the household members sit on to watch programs on TV. You should take into account the height of chairs, armchairs, a sofa, as well as the arrangement of other furniture in the room, choosing the optimal place on the wall for the TV.
The square of a house or apartment is one of the main criteria that influences the choice of a place for installing a TV and the dimensions of a device purchased for a particular room. In a one-room apartment, for comfortable viewing, the TV panel should be placed diagonally from the center of the sofa, bed or sofa. This approach allows you to see what is happening on the screen from anywhere in the room.
What affects the height of TV placement on the wall
Several factors affect the choice of wall location for hanging a large screen and height from the floor. The purpose of the room is taken into account: it is a living room, a bedroom or a kitchen, and the existing furnishings. After all, it is important that the TV on the wall fits harmoniously into the interior, and does not spoil the aesthetics of the wall with wires. The main criteria in deciding the choice of placing the TV in height are the dimensions of the room and the panel itself.
By my own feelings
The method is SIMple, implemented collegially by adult household members. One needs to sit comfortably on the couch, close his eyes for a few seconds, and open his gaze to the wall. In the place where the “viewer” is looking, the second can mount the bracket. It will be useful to listen to the comments: to the left, to the right, slightly higher or lower.
The calculation is carried out taking into account the recommendations of doctors: the screen should be located at the eye level of the viewer. Otherwise, image distortion will be observed. Also, the formula includes a coefficient that determines the distance from the wall where the TV is planned to be placed to the viewing point. The distance is determined by multiplying the coefficient by the length of the diagonal of the TV-panel.
The multiplier value depends on the type of matrix (LCD or plasma) and resolution (720p or 1080p). For LED screens with a 720p resolution, a factor of 2.3 is used, and for a 1080p resolution, a factor of 1.6. According to mathematical calculations, the optimal height for different conditions varies from 1 to 1.3 meters.
Table of TV diagonals and distances to them
For those who do not want to go into online calculators and play with different parameters of diagonals, viewing angles and distances, you can focus on a ready-made table of acceptable values in a given range of values.
|Screen diagonal, inches (16: 9)||ten||1.02|
|Best distance, m|
When discussing maximum screen size, two factors are taken into account: screen resolution and distance from the TV screen. Most TVs are 1080p, which is a large number of pixels on the screen. Even on the largest flat panel sizes available today, you will not see the pixels at 2.7 meters.
If your TV (or projector) is not of high quality, you may see various image artifacts such as picture noise or poor quality anti-aliasing, but you are unlikely to see pixels. If you place yourself at a shorter distance to such a TV, then the pixels may become visible (but this is too small a distance).
This is one of the reasons we think Ultra HD (4K) TVs are “stupid” because of the large number of pixels the human eye can actually see. Technology and math beats organic.
So, very large TVs may not look so good when you are very close to them. It is good if you are watching a high quality source such as Blu-ray disc on a 4K player. The most “crooked” option is viewing SD or HD content that has been upscaled (scaling).
Another factor is the dominance of the room over the allowed space. Naturally, this is a purely subjective factor. The question is. what is the largest TV “should” occupy the space in your room so that it does not become the dominant device in the room (figuratively and literally)?
You can go the easy way. Print or cut cardboard of a TV screen of the appropriate size that you dream about or know its physical dimensions from the characteristics, and arrange the “layout” in the place of installation. So to speak, really to look at. But you need to take into account the fact that the TV will actually be a little larger than your cardboard. Of course, it depends on your room, decor and the opinions of your loved ones, which should be considered.
TV Distance Recommendations and Calculations
There is a direct correlation between the recommended screen size and the viewing distance. The farther the distance, the larger your TV should be. Ideal is a screen view that fills a certain field of view, although the term “ideal” requires additional discussion and interpretation.
THX (The Standard for the Total Requirements for High-Quality Home Theater Systems) recommends, for example, a 40-degree viewing angle, considering it to be optimal for the “fullness of sight”. What does 40 degrees mean to the viewer?
For example, most users prefer to be located 9 feet (108 “or 2.74 m) away from the TV, so THX recommends a 90” screen size for this distance. This means that a 55-inch TV will not be the largest, at least of these recommendations. Therefore, the recommendations are reduced to installing a 60-inch screen at a distance of 2.74 meters from the browser.
The SMPTE (Society of Motion Picture and Television Engineers) recommends a 30-degree view, slightly less than THX’s recommendation. To calculate the distance using these guidelines, you need to multiply the distance between the viewer and the TV screen by 0.625. Thus, given our distance (in the example) 2.74 meters, the diagonal of the TV screen should be 68 inches (average between 65 and 70). However, we understand that not everyone has the opportunity to install such a large TV due to the space of the room.
CNET, having connected to this question, recommends to be located no closer than 1.5 times the diagonal of the screen, or use a multiplier of 0.667 to calculate the distance in a SIMilar way. This calculation results in a “slightly larger” TV screen size for your room than SMPTE guidelines. So, the maximum size is 72 inches (closest to 70 inches) for our estimated distance of 2.7 m.
Although these are correct recommendations, we believe that they should be taken precisely “as recommendations”, and not as specific rules. It is too easy to get addicted to mathematical numbers and calculations, when in reality reality is far from theory and much more complicated. In everyday life, additional factors always happen, and “for one or two” these calculations do not work.
Distance to TV depending on diagonal. Table
In this article, we’ll take a look at the factors that affect the optimal viewing distance on a TV screen. From what distance to watch TV depends mainly on the diagonal and resolution of the TV screen. We offer you to familiarize yourself with the recommendations of THX, CNET, SMPTE in this regard, we will provide a table for calculating the distance to the TV depending on the diagonal, screen resolution and content viewed on it from SD to 4K.
What’s the biggest 4K TV you need? 37, 42, 50, 65 or 75 inches, if any diagonal from the vending TV series is available and the budget allows? We’re not going to be looking at a huge study or entertainment center right now, where you could probably install the largest TV. Consider an ordinary living space. your room or hall.
How far to watch 4K TV
The question “From what distance to watch TV” refers to the distance that depends on the size of your room, or more precisely, the distance from the place where you sit to the screen. Also, the choice of the diagonal depends on the number of people SIMultaneously watching TV.
In other words, first choose the place where the TV will stand, and the seat from where you are going to watch it. Then measure the distance to the TV. Depending on this distance, you should choose a TV with a diagonal size that is comfortable for viewing.
In our opinion, the recommendations of organizations such as SMPTE and THX are somewhat overstated for 4K TVs to take them as a basis. In addition, we did not consider the option that if 2 or 3 viewers SIMultaneously watch a TV set even with a diagonal of 60 from a 1.5-meter distance, then viewing will be uncomfortable due to the increased viewing angle. In the end, we tried to consider from a mathematical point of view the question of what distance to the TV is most convenient for a certain size of the TV diagonal, and talked about the best viewing angle of the TV.
Distance to TV for home viewing
Choose a TV. not the most common event in life. Leaving aside preferences in brands and type of TV, these are topics of other articles. Let’s see how the screen size affects the distance to the TV from which we will be watching.
Of course, it is very important to place the TV in a specific room in terms of free space and design features of the room. We will also omit these parameters and take a purely scientific approach, taking into account the peculiarities of human visual perception.
The choice will be based on the most correct and most impressive perception of the movie, which depends on the distance from the TV.
Angle of view and distance from TV
The angle of view should ideally be symmetrical and range from 40 to 45 degrees. In a cinema, depending on the size of the auditorium, the size of the screen also has a certain value. Peripheral vision is most sensitive to movement, while direct vision is focused on the clarity of perception, which is why peripheral vision is responsible for the realistic perception of virtual reality cinema.
The most realistic perception of a motion picture occurs when the viewer is located in the VIP zone, which is usually 2/3 of the distance from the screen.
With these parameters, human vision works most optimally. both central vision and peripheral vision are used.
Lack of peripheral vision when watching TV (or unnecessary perception of the home environment) significantly reduces the emotional experience of cinema.
According to Dolby LABS requirements for cinemas, the horizontal angle of view in the last row of the cinema should not be less than 31 degrees and not more than 60 degrees in the first row. By setting the parameter of the angle of view of 45 degrees, you can make the following table:
It turns out that with a diagonal of 2 inches, the distance to the TV should be 85 centimeters? By and large. Yes. But in the cinema, the viewing angles are applied to the 1: 2.35 aspect ratio. In this format, most films for film distribution are shot. The TV has an aspect ratio of 16: 9, or speaking in “cinematic” language 1: 1.78. What to do? We’ll have to transfer from the beginning of the VIP zone a little further, to its last row, where the horizontal angle of view is 35 degrees.
Let’s make calculations with this value:
So we got the optimal viewing distance for a 16: 9 TV. Everything seems to be clear. But the TV is not a cinema, the picture has a completely different resolution. And there are Full HD TVs, and there is HD Ready.
It is known from the physiology of the human body that visual acuity in a normal person is equal on average to 1 arc minute, that is, 1/60 of a degree. If the angle between two visible points is less than this value, then they will merge, if more than this value, then we will see them separately (discretely). So, in order for us to perceive the picture clearly enough, but it does not crumble into separate pixels, we need to see 60 points (pixels) in 1 degree of angular view.
Multiply 60 points by 35 degrees to get 2100 points. But a Full HD TV only has 1920 horizontal dots! Therefore, TV manufacturers transfer us from the VIP zone even further, almost to the last row. 1920 points correspond to 32 degrees of angular view.
Let’s recalculate our table again:
This distance corresponds to the threshold value when the perception of the human eye is on the verge between the integrity of the picture and its possible pixelation. Our little movement and that’s it, the brain caught the grain and noticed the artifacts of the image details. It is necessary to move further, alas, to the last row of our virtual cinema, where the viewing angle is 31 degrees.
We’ll have to recalculate our table again:
Features of the choice of viewing distance
What about HD Ready TVs? Alas, they will not provide a “cinematic” experience in any way. The maximum angle for viewing a clear picture is 21 degrees (divide 1280 by 60). However, you can move closer at the recommended distance and try not to pay attention to noticeable pixelation in the image. If they move further, then the picture will be perceived organically, clearly, in detail, but the peripheral vision of your eyes will not be involved. Consequently, it will be SIMply impossible to perceive the film as it is perceived in the cinema.
Realizing all this absurdity, some manufacturers are starting to release TVs, “sharpened” specifically for the film format. For example, a Philips Cinema TV has an aspect ratio of 21: 9. Using cinematic parameters, the aspect ratio is 1: 2.37 and its resolution is 2560 x 1080 pixels. What angle of view does it provide? Dividing 2560 by 60 gives 42.7 degrees of horizontal angle view. Ideal setting for the best place in the VIP area of the cinema!
Of course, the TV is bought not only to watch movies. There are news, educational, entertainment, sports programs. and a lot of things. And here you should not adhere to the above recommendations. In this case, other criteria play a decisive role, sometimes just subjective.
But if you are a movie fan, or are building a home theater primarily focused on watching high-quality films, then choose the screen size and viewing distance correctly. You want to have a strong movie experience like in a good cinema.
And don’t forget the recommendations of the famous filmmaker George Lucas, who said that good sound is half the impression of a film. Do not limit yourself only to high-quality images, multi-channel sound coupled with great picture will give you hours of pleasure from the magical world of cinema. Even if you watch films where the main parameter is the storyline, then a good and sound sequence will greatly enhance the emotional experience.
Distance from eyes to TV
Formula for calculating range
A person spends a lot of time in front of the TV, and incorrect installation can lead to fatigue, headaches and, naturally, visual impairment. This is due primarily to its unfortunate location, since when viewing the diagonal of the TV and the distance to it are really important.
For those who want to understand how the distance from the screen is determined, it is better to read the article, and for those who do not want to count on their own, I suggest using a calculator, it gives the distance for TVs with different resolutions:
If you feel such discomfort or are just looking for a place to put it, then this topic really needs clarification.
There are several ways to calculate the distance from your eyes to your TV. One of them is based on the mathematical relationship between the size of the TV and its distance from the user. It is also called the rule of five diagonals. This rule was also used with CRT TVs. In this case, the TV diagonal was multiplied by five, for example, for a 21-inch device (1 ″ equals 2.54 cm), the optimal distance to the TV screen should have been approximately 2.6 meters.
The second method requires calculation and involves using a special formula to determine the distance from the TV to the viewer and is more suitable for LCD TVs:
L = DP,
D. TV size (inches);
L. distance to the screen (meters);
P is a parameter that allows you to determine the largest and smallest value of the possible distance (ranges from 3 to 6 units).
Hence, if you need to calculate at what distance you need to watch TV if its diagonal is 42 inches, then substituting the values we get the optimal range for the TV from 1.26 m to 2.52 m.
Here are some more calculated values for LED TVs with popular diagonals.
- 32 inches. 0.96 / 1.92 meters;
- 40 inches. 2 / 2.40 meters.
Still, all these values can be considered approximate, but it is quite possible to choose the optimal distance. In fact, everything is somewhat more complicated.
If you sit close to the TV, you will see the “grain” of the image, but if you sit far away, then peripheral vision will not be involved and there will be poor detail. In this case, the calculation is carried out in a different way.
Human vision is designed so that it is 1 arc minute (1/60 of a degree), that is, so that the image does not disintegrate into pixels, we must see exactly 60 pixels in 1 degree.
Now let’s take the popular Full HD TV size of 1920 horizontal dots and 1080 vertical dots. From here we get the optimal viewing angle. 1920/60 = 32 degrees. Now, remembering the school course of trigonometry, knowing the leg and angle, you can get the distance to the TV.
But all the same, this angle assumes being in such a zone that a slight deviation from it (tilt forward) and the point structure of the image will become noticeable, so it is better to reduce the angle to at least 31 degrees, that is, sit further.
From here we get the following results:
For 3D TVs, the angle should be increased to 50. 70 degrees.
If you don’t want to count, you can use the calculator, it gives the distance for TVs with different resolutions:
If you sit close to the TV, you will definitely see pixels on the screen, even if there is a 1080p movie streaming there. Accordingly, as the distance between you and the TV increases, the density of details will also increase, creating a better picture. This effect is called angular resolution, that is, the number of pixels per angle of view. The further the distance from the user to the TV, the greater the angular resolution.
The limit to which you can increase the angle of resolution, moving away from the TV, depends on your visual acuity. at some point, your eyes will no longer see detail. Research shows that a person with a visual acuity of 1.0 (or 6/6 or 20/20) can distinguish pixels from each other at a ratio of 1/60. This means 60 pixels per degree, or 32 degrees for a 1080p TV.
Using this data, you can calculate the closest distance you can sit to your TV, while maintaining the maximum angular resolution, and this distance will be 1.6 times the diagonal of your TV. For example, a 55 “TV would have an ideal viewing distance of 88” (55 “x1.6) or 223.52 cm (88 x 2.54).
The diagram below shows the optimal distance for various resolutions such as DVD (NTSC 720×480 or PAL 720×576), 720p, 1080p and 4K (Ultra HD). Only the number of horizontal dots is taken into account, therefore PAL and NTSC in DVD resolution are located together.
Optimal TV-to-user distance for comfortable viewing
The distance from the eyes to the TV screen: what should be optimal
Bigger and closer. that’s what the consumer thinks about when it comes to choosing the perfect TV for the apartment. But size is a factor that influences not only the price of a TV, but also the perceived picture quality.
The distance from the eyes to the TV screen: what should be optimal
The final diagram by which you can calculate the optimal distance to the TV is in the middle of this article, if it is not clear how to read it, then there is also an explanation just below the diagram itself. Well, the theory, what is how and why, further in the text.
How to read a diagram
Suppose you have a 50 ″ TV, so the graph starts at the bottom of the diagram at 50 ″. At a distance from 0 to 0.9 in Ultra HD resolution, you will see pixels (white box in the chart). The gap between 0.9 and 2.0 meters (blue field) will be ideal for viewing in Ultra HD quality, since you will not see the pixels in this gap and still see all the details of the image. Further, in the range from 2.0 to 3.0 meters (purple field), you can watch 1080p with the greatest comfort. Above three meters, the image quality will degrade for 1080p because your eye will no longer see all the detail of the displayed content. Accordingly, at a distance of more than three meters, your eye will not see the difference between 720p and 1080p, but up to 5.5 meters, you will still see pixels at 480p. Further five and a half meters, you can already comfortably watch content in 480p.
The ideal distance is the point where the diagonal dimension line touches the color resolution line. But this, as a rule, is not always realizable, so you can use the distance that, with the specified diagonal, is in the field of the required resolution.
You’re probably thinking something like, “My sofa is 3 meters away from the TV, so I need a 75″ TV? This is madness!” Yes, if you want to get the full effect from 1080p resolution, then this will be the best option given the distance of the user from the screen. And that brings us to the main limitation for most people. the budget, as the cost of a TV increases exponentially by its size.