> In the modern world, the characteristics of TVs help make the right choice when buying equipment. They can also help with setting up the TV. Many people mistakenly believe that price is the main criterion for evaluating products, but this is far from the case. If you look at all the shelves with TVs, you can notice a significant difference in image quality.
The consultant will turn on one TV to evaluate it and it will be difficult to find defects without comparing it with analogues. So, when buying any equipment you need knowledge about key characteristics. The article contains information about them.
Content
Brightness
It is one of the most important parameters of TVs. Stock brightness of the picture is necessary for each type of screen. This criterion is responsible for comfortable viewing of your favorite films in low or too high light conditions in the room.
It is recommended to select a TV with a value of 250-400 cd / m². This is the minimum limit that can provide decent quality. Brightness directly depends on the size of the screen diagonal. For example, for nineteen inch devices, the acceptable brightness is 250 cd / m², and for thirty-six inches - 500 cd / m². This is the standard minimum that should be followed.
To check the brightness, it is necessary to raise the value of the indicator to the maximum and then lower it to the minimum during video playback under medium illumination. If the technique is of good quality, then the picture will darken noticeably for the human eye. On LCD this effect cannot be seen. The most important thing is that the brightness of the picture should not exceed the normal values so that the eyes do not hurt during viewing. At maximum, lightening should also be visible.
Viewing angles
This parameter was of greater importance several decades ago. In LCD TVs, the color quality is adjusted by the angle of the image, in contrast to Soviet picture tubes. In the first LCD-type models, the ability to view at an angle was not provided at all. Despite this, do not forget to check from all angles. In order to verify the large viewing angle, you need to move away from the screen and look at it. If you are satisfied with the quality, then you can buy the unit.
Manufacturers of modern TVs indicate this indicator in degrees. It is recommended to consider models with an angle of at least 175 degrees.
Pixels
It is worth considering the number of idle pixels as a separate characteristic. These are image particles that cannot acquire the color required by the incoming message. In any screen you can find these details. The developers allow the appearance of several non-working fragments. So, choosing a TV, it is recommended to study in detail all its components and choose a model without broken pixels.
Connectivity options
Technical characteristics of TVs are often quite high. But to use the capabilities, it is fully necessary to connect third-party devices. When choosing a technique, pay attention to the number of connectors and their location. To date, the most common plug-in devices are:
- blu ray player;
- video and camera;
- console for games;
- a computer;
- USB stick
- small cinema;
- antennas.
There are several types of connectors:
- scart;
- C-Video;
- component
- tulip;
- HDMI
- USB
At the moment, the last of the above are most relevant.
Matrix Response Duration
This parameter demonstrates the time it takes to change the location of the crystal at a point for a diverse ability to transmit colors.Modern liquid crystal models were able to achieve a result in a few milliseconds. This characteristic is decisive for the matrix board of an LCD TV. Developers are trying to minimize this parameter. Different manufacturers do not have a unified definition of response time, therefore, it is not uncommon for TVs with different indicators to show the same quality.
For example, to get a small board response time, manufacturers measure the time the pixel transforms from an open to a closed state, that is, from black to white. Such a result provides for the imposition of a large voltage on the pixel, therefore, the speed of changing the position of the crystals also increases. But when measuring the duration of the transition between the borders of black and white colors, this transition time is much longer, which happens when measuring in the conditions of the store.
It is necessary not only to consider passport data when selecting a TV, but also to check the image quality yourself. This indicator is recommended to be checked with the help of a quick frame change. If no loops are observed behind the picture, then the response time is normal.
Screen resolution
Comparing TVs according to these characteristics is necessary. The parameter tells about the number of points that are used to create the viewed image on the screen. The resolution is indicated in the passport in the form of a ratio of two digits. The first indicates the number of pixels horizontally, and the second vertically. If you look at the screen in detail, then you can make out three points that are its components. The cost depends on the number of points. The more of them, the better the clarity and color reproduction.
In addition to the resolution of the TV screen, there is also a resolution of the external signal that is supplied to the device. Therefore, to fully appreciate the characteristics of the TV will turn out only when watching high-quality video material.
For example, a television with a resolution of 1920 by 1080 is supplied with a television signal of 72 by 756 points. The result will be worse than the old CRT TV. But if the signal is the same as the TV screen, then the output will be excellent clarity.
The 1920x1080 signal is called an HDTV, aka Full HD. To play this resolution, you need a blu-ray player and matching discs. There are also screens with a resolution of 1366x768, but today most of the models support 3840 by 2160.
TV diagonal
To choose a good TV in terms of parameters and price, you need to focus on the diagonal of the screen. Its units are inches, it is contained in the technical data sheet of the device. The device name contains this number. Most often it is twenty one, thirty two or thirty seven. Choose should be based on the following factor. The distance at which you will watch the device. The recommended distance is three or four diagonals of the display. But it should be remembered that the closer the viewer to the TV, the brighter the imperfections of the image. Distortion becomes less as resolution increases. Simply put, the higher the numerical indicator of this parameter, the closer viewing is allowed. But you should not look from such a distance at which you have to turn your head.
Picture contrast
This indicator shows how many units one part of the picture exceeds the other in contrast. In the technical data sheet, the contrast is usually indicated as 900: 1. This demonstrates the ratio of white and black levels. To choose a good LCD TV, two types of contrast should be distinguished:
- Dynamic. Varies according to the characteristics of the reproduced image.
- Static Corresponds to the parameter of the liquid crystal matrix. Shows how much the lightest picture will be brighter than the darkest.
After reading this article, the average consumer will know by what parameters to choose a TV and what is the determining factor when buying it.
Here were considered the main characteristics of televisions, which form its final cost. It is worth remembering that acquiring equipment based on only one indicator is stupid and inexpedient. Often televisions from different price categories have different numerical characteristics. They can be higher or lower. Only a comprehensive review of the device parameters will allow you to choose it for a long time.
It is also worth paying attention to the selection of a TV for advanced parameters. If it is difficult to make a choice according to standard indicators, you can always pay attention to details that betray the advantage of a particular model.
