In the modern world, the characteristics of TVs help to make the right choice when buying equipment. They can also help you set up your TV. Many mistakenly believe that price is the main criterion for evaluating products, but this is far from the case. If you look through all the racks 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. This means that when buying any equipment, knowledge of the key characteristics is necessary. The article contains information about them.
It is one of the most important parameters of TVs. A margin of picture brightness is required for each type of screen. This criterion is responsible for comfortable viewing of your favorite movies in low or too strong light 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 diagonal of the screen. For example, for nineteen-inch devices, acceptable brightness is 250 cd/m², and for thirty-six inches, 500 cd/m². This is the standard minimum that should be adhered to.
To check the brightness, while playing a video in medium light, you need to increase the value of the indicator to the maximum, and then lower it to the minimum. If the technique is of good quality, then the picture will darken noticeably for the human eye. On the LCD, this effect cannot be seen. Most importantly, the brightness of the picture should not exceed the norm so that the eyes do not hurt while viewing. At the maximum value, lightening should also be visible.
Viewing angles
This parameter was of greater importance several decades ago. In LCD TVs, the color reproduction quality is corrected by the image display angle, unlike Soviet kinescopes. In the first models of the LCD type, the possibility of viewing at an angle was not provided at all. Despite this, do not forget to check from all angles. In order to make sure of a 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 non-working 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, when choosing a TV, it is recommended to study in detail all its components and choose a model without dead pixels.
Connectivity
Technical characteristics of TVs are often quite high. But to take full advantage of the possibilities, you need to connect third-party devices. When choosing equipment, 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;
- game console;
- a computer;
- USB flash drive;
- small cinema;
- antennas.
There are several types of connectors:
- scart;
- C-Video;
- component;
- tulip;
- HDMI;
At the moment, the last of the above are the most relevant.
Matrix response time
This parameter shows the time to change the location of the crystal in a point for a variety of color transmission. Modern liquid crystal models were able to achieve results in a few milliseconds. This characteristic is decisive for the LCD TV matrix board. The developers are trying to minimize this parameter as much as possible. Various manufacturers do not have a common definition of response time, so it is not uncommon for TVs with different indicators to demonstrate the same quality.
For example, to get a short board response time, manufacturers measure the time it takes for a pixel to transform from an open state to a closed state, that is, from black to white. This result ensures that a large voltage is applied to the pixel, therefore, the speed of changing the position of the crystals also increases. But when measuring the duration of the transition between the boundaries of black and white colors, this transition time is much longer, which happens when measuring in a store.
It is necessary not only to take into account passport data when choosing a TV, but also to check the image quality yourself. This indicator is recommended to be checked using a quick change of frames. If there are no trails behind the picture, then the response time is normal.
Screen resolution
It is necessary to compare TVs according to these characteristics. The parameter tells about the number of points that are used to create the viewed image on the screen. Permission is indicated in the passport as a ratio of two digits. The first indicates the number of pixels horizontally, and the second vertically. If we consider the screen in detail, we can disassemble the 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 the resolution of the external signal that enters the device. Therefore, it will be possible to fully appreciate the characteristics of the TV only when viewing high-quality video material.
For example, a TV with a resolution of 1920x1080 receives a television signal of 72x756 pixels. The result will be worse than the old kinescope TV. But if the signal is the same as the TV screen, then the output will be excellent clarity.
The 1920x1080 signal is called HDTV, aka Full HD. A Blu-ray player and suitable discs are required to play this resolution. 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 of measurement 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. You should choose based on the following factor. The distance at which you will view the device. The recommended distance is three or four display diagonals. But it should be remembered that the closer the viewer is to the TV, the brighter the image imperfections become. The distortion becomes less as the resolution increases. Simply put, the higher the numerical value of this parameter, the closer the viewing is allowed. But you should not look from such a distance that you have to turn your head.
Picture Contrast
This indicator shows how many units one part of the picture exceeds the other in contrast. On the data sheet, the contrast ratio is usually stated as 900:1. This demonstrates the ratio of white and black levels. To choose a good LCD TV, you should distinguish between two types of contrast:
- Dynamic. Varies according to the characteristics of the playback picture.
- Static. Corresponds to the parameter of the liquid crystal matrix. Indicates how much the lightest picture will be brighter than the darkest.
After reading this article, the average consumer will know what parameters to choose a TV and what is the determining factor when buying it.
Here were considered the main characteristics of TVs, which form its final cost. It is worth remembering that acquiring equipment based on only one indicator is stupid and impractical. Often TVs from different price categories have different numerical characteristics. They may be higher or lower. Only a comprehensive consideration of the parameters of the device will allow you to choose it for a long time.
It is also worth paying attention to the selection of a TV according to advanced parameters. If it is difficult to make a choice according to standard indicators, you can always pay attention to the details that betray the advantage of a particular model.