When choosing a television set must take into account many different factors, but mainly the TV diagonal is the main parameter. It determines the size of the screen, as well as affect his authorization, and the device class. A model with a larger screen first to receive technological innovations and new additional functions. Therefore, many are interested in the value of the TV diagonal in inches and centimeters.
Inch - a measure of length, which is used in the United States, Britain and other countries, is indicated. " It is equal to 2.54 cm. As the first major technology brands have appeared in America, today screen diagonal is measured in inches.
The former CRT TVs length of the sides of the screen was the same, therefore, the ratio was 1: 1. With the development of technology has set the standard 4: 3, and the image proportions are closer to film shots. Modern standard 16: 9 viewing area increases, which can reach the vision.
Keep in mind that at the same diagonal height and width of the display is different depending on the aspect ratio.
Communication resolution with a diagonal
screen resolution - the number of pixels that form an image. The more of them, the clearer the picture will be. video format should match the resolution of a television receiver matrix.
If the display with high resolution and wide screen lodge poor quality signal, the image will be blurred, and the eye to see the clear picture will have otsest away. In this case, high-quality signal to the matrix with low resolution will also be reproduced poorly, making the picture loses its detail and color saturation.
Sometimes multiple image standards:
- SD - 720x576 pixels is used in inexpensive phones and tablets;
- HD - 1290h720 pixels used in television sets with a screen size of up to 32 ";
- Full HD - 1920x1080 pixels, suitable for display receivers to 40-43 ";
- Ultra HD or 4k - 3840h2160 pixels see a noticeable difference between Full HD and Ultra HD only on large screens from 40-50 "and above;
- Quad Ultra HD or 8k - 7680h4320 pixels found in the most modern models with a display of 70 ".
4k source standard signal is not so much, and even more so 8k. The content of this quality is mainly focused on the Internet.
screen measurement
The diagonal of the matrix is traditionally included in the name of the set-top box models and stands in it after the lettering, for example, Samsung UE49NU7300U - TV with a screen of 49 inches. To measure this parameter by yourself can be a tape or sewing meter, but for concave screens fit only tape measure - it must be constantly pressed against the surface.
A distance to be measured between the corners on the diagonal matrix TV - between the upper right and lower left, or vice versa, between the left upper and right lower. Frame and other body parts in this size are not included.
Translation inches to centimeters
The easiest way to find out how many centimeters inches possible by multiplying the number of inches by 2.54. And contrary to translate the size of centimeters inches - divide the value by 2.54. It is also the most common sizes in both TV units are summarized in the table below.
The choice of the diagonal
When buying a TV screen size selection depends on the following factors:
- size of the room;
- the distance to the vehicle from the point of view;
- standard signal source;
- image type.
In addition, all depends on the available budget - the display is bigger, the price is higher.
size of room
Large displays in the 55-70 "expensive, in addition, their potential is not fully apparent in the kitchen or in the small living room. For compact spaces is better to take the model to 32 "- their place will be easier and more convenient to watch.
Distance
The standard dimensions of the room where the suit model 40 "and more from the sofa to the TV at least 3-5 meters. For devices from 65 ", as a rule, a separate room equipped with high-quality acoustics.
The signal source
standard signal source is also important in the selection screen size. If the picture comes from a satellite receiver, issuing only HD, then it makes no sense to buy a high-quality television with a large matrix and the 4k standard.
image type
It should be noted and the influence on the image type selection. If you plan on viewing dynamic content, it is still necessary to pay attention to the frame refresh rate - it should be no lower than 100 hertz. Otherwise, the image will lose its realism will be blurred.
For dynamic content may include, for example, live sports broadcasts on cable channels in high quality. When connecting to a game console to a television, this parameter is very important too, otherwise the image will lose its realism will be blurred.
Calculation of the distance to the TV
According to medical recommendations positioned for watching movies need as far as possible from the display. This is necessary to reduce the load on the eye.
The image should occupy an optimum position in the field of view. If a big TV to sit too close, the eye muscles are overstrained by trying to cover too wide sector. This can lead to vision loss.
To roughly calculate the best distance to viewer television set can use the formula on which the distance should be three diagonals. So, for the display of 40 inches is the optimal distance of 2.5-3 meters, and for the 80-inch will need already 5-6 meters.
With the increase in screen resolution recommended distance is somewhat reduced, to give the viewer the opportunity to view the details. In addition, specific recommendations are always described in the data sheet model.
Diagonal TV screen - one of the main parameters of the choice of the TV. It determines the size of the image is associated with the broadcast standard resolution and additional features. Therefore, the optimal viewing distance transmission is determined based on the diagonal. And in order to have a more accurate representation of the values of inches can be converted into the more familiar centimeters.
