It was decided to buy a new TV or monitor … In the home appliance store, just eyes run out … Different models with incomprehensible notation and characteristics: LED, LCD, IPS, OLED, VA. What it is and how to make a choice in favor of a TV and monitor, read in our article.
What it is?
The matrix is an important and most expensive part of the TV, the basis of its screen. Any LCD monitor or TV works for the property of liquid crystals to change the polarization plane when the light stream passes, proportional to the applied voltage. The liquid crystal matrix is a system of electrodes that are located vertically and horizontally. If you look at the matrix through a microscope or a special powerful eyepiece, you can see green, blue and red “particles”. Most often they are rectangular. Each of them is subpixel. Three subpixels together – this is a pixel. To make an image, the light stream must pass through all the layers, of which the matrix consists. This is polarizer, liquid crystals, light filter and one more layer of polarizer.
Located vertically columns are connected to the decryptor (column drive). Horizontal and vertical rows do not come into contact. Their functions are controlled by a lowercase decoder. Also this device is called the addicator counter.
So you can just tell how the LCD panel is arranged.
Types of TV matrices differ in each other. When a person goes to the store for buying, he will see the differences between them: the image of different models will vary.
Review of species
Matrix with different characteristics can be installed in each TV model. From these parameters depends on what the image and the nature of the color rendition will be. Perform them to compare.
This type (twisted nematic) is usually installed in cheap TV models. Translated from the English name means “twisted crystal”. Liquid crystals in pixels are spiral.
Advantages of such products – Energy Economicity, Budget price, response time less than 6 ms.
Cons of this type – the different color of the same object depending on the viewing angle of the watching, also the incomplete transmission of all colors. To increase the viewing angle slightly, sometimes use special coating (TN-FILM type).
TV with this type of matrix is suitable if you watch it at right angles. In this case, the image will be as close as possible to the real, how much allows this technology. If the furniture is located so that the TV will look at an angle, it is better to make a choice in favor of technology with another type of matrix.
Another significant disadvantage – “broken” pixels that are glowing are not very noticeable on the screen. They may arise because even in the absence of voltage, liquid crystals still miss the light.
This type (in-Plane Switching) was developed by Hitachi. The advantages of it is an excellent color rendering, a bright picture, an angle of view up to 178 ° (VA type – up to 160 °). Such an angle makes it possible to see the same picture from different sides (from above, on the side, straight).
The price of multimedia devices with a type of matrix is significantly higher than others. Also a bit “lame” response time. Only in very expensive models there are no problems.
This type (Vertical Alignment) has an abbreviation that translates “Vertical Alignment”. This is the brainchild of the Japanese company Futjitsu.
Optimal solution if you need to select a monitor for computer games. The main advantage of this type of matrices is uniform illumination. The color rendition is good. The viewing angle is quite large, response time – fast (up to 5 ms).
They are based on organic LEDs. Available on sale as models with RGB LED matrix and WRGB matrix. In the last variant, except for the LEDs of the main three colors, another white diode is installed. Brightness, thanks to this technology, rises. Black transfer – very realistic. Response time – minimal. These models have good characteristics and attractive design. They are superfine and look very modern.
Each of the pixels radiates light. They can turn on and off separately from each other. Next to black there may be last minute pixels. Thanks to such technology, the effect of infinite contrast is achieved. Additionally, the backlight is not required.
Negative factor when choosing a TV with such a matrix is a limited operation of the LED. So, in the red working resource about 15 thousand. hours, and in green – about 100 thousand. hours. It follows from this that the longer the device works more, the worse its color rendition becomes.
ULED and QLED are distinguished by the presence of illumination from blue dots, as well as the presence of green and red quantum dots. RThe result – the formation of spectral white light. Due to this, the color gamut is expanding on the screen. Technique on which such matrices are installed, can transmit absolutely white or pure-sulfur. Such matrices will suit connoisseurs of beautiful pictures and high-quality color reproduction. These are the most modern matrices.
In the event of a failure of the matrix, it can be replaced with another. Interchangeability – an interesting feature of matrices. If they are the same in size – it may already mean that they are suitable for replacing each other.
You need to choose not by the name of the TV model, but on compatibility. This can be found out on labeling.
It is easy to do. Need to remove the rear casing on the TV. And find the necessary information. It is usually located above the serial number, next to the name of the model of the TV or monitor. In some cases, when replacing the matrix to another – you have to reflash the scoleler.
How to find out type?
To determine the type of matrix, sometimes it is enough to look into the manufacturer’s documents. However, this can be done independently, paying attention to external signs.
- Type VA In view of the inspection, the color will pale before.
- If you carefully spend your finger across the screen, the visible trace remains. This means that the VA matrix is installed.
- Black color on IPS type matrix – slightly with a bluish tinge.
One of the largest manufacturers of manufacturers of matrices for LCD TVs in the world – known to all the company Samsung. Produced the elements in question are also brands such as LG, NEC, Toshiba, Hitachi.
Most matrices manufacturing factories are located in China, Taiwan.
Among the local Chinese manufacturers of mass production leaders Boe and China Star Optoelectronics Technology (CSOT).
What better to choose?
To choose the right one or another model of the TV, you must first decide for what purpose it will be used. Also worth paying attention to the fullness of your own wallet. If there is a financial opportunity, then choose a better option with an expensive matrix. Although need needs to be taken into account. If the requirements are low, you can choose a technique with a TN type matrix. Similar TVs most often have a diagonal not more than 43 inches. Such a TV can be used as a monitor.
Technique with TN Matrix Type Suitable:
- lovers of dynamic computer games;
- Those who want to save on the purchase;
- To those people who need a TV with a diagonal of 23-24 inches, for example, in the kitchen or to the cottage.
Equipment with IPS matrices will be optimal for:
- designers and those who work with photos;
- big families (the TV, they probably look from different places room, the picture will be the same for everyone, without distortion, is great for home theaters);
- lovers play games-strategy.
Technique with installed VA type matrices well suitable for small rooms. Color reproduction is a little worse than in IPS type matrices. Devices with such matrices – medium price category.
If the color rendition is important, then you need to choose equipment with IPS, OLED matrices, qled. They look the most realistic.
The most popular on the household appliances market are models equipped with OLED matrices. This technology has huge advantages over others. Distinctive features – deep black, no illumination on the sides.
Also advise when choosing a technique to rely on your eyes. People may have a slightly different perception of the color scheme, brightness, contrast. Therefore, you can trust yourself and take that tv that suits on the basis of individual preferences.
New technologies go ahead with sevenmile steps. A couple of years ago, TVs equipped with a 4K system were still in the wonder. Now they are bought much more often. In televisions supporting such a format, the following types of matrices are usually set:
How to check for performance?
To check the working capacity of the matrix, you need to spend a test. To do this, use test pictures downloaded to the USB flash drive. It is white, green, red and blue color fields.
On the monophonic pictures of this plan, you will see broken pixels. They can be considered for sure using a mobile phone camera.
It is also worth checking the image of a TV on a gray background. Sometimes significant defects can only be noticed on it, for example, the polarizer defect.
You should see the real image on the TV. It happens that on a gray background a little noticeable dark spot. And on a realistic picture it is not visible. Such a defect is not knowledgeable. TV can be purchased, because on a huge screen, and even from a distance of several meters such a spot is exactly no one to see.
Verification of the TV on the uniformity of the LED backlight is carried out on a dark background. You need to make sure that there are no big “illumination”. Small non-uniform illumination Most manufacturers are not considered for marriage. TV may not change if the defect will be detected later.
If a person likes to watch TV before bedtime, with a muted or completely off light, then the presence of a light defect can be a very unpleasant surprise. Therefore, before buying it costs carefully and not hurry to check the image.
Possible defects and malfunctions
If there were broken pixels after purchasing the TV, then vertical stripes on the screen may be discovered after some time. This defect can also appear in the form of horizontal strips. Most often there is one line. Sometimes there are several of them. Color can be black or green, red, blue. It depends on what pixels are affected.
On a gray or white background, you can also see “colored spots”. Manufacturers consider such a defect permissible. TV for this reason will not be subject to exchange.
Also on a light background you can see dark corners. It is also not considered marriage. If dark spots are significant in size, and the dimensions of the screen are small, watching TV will not be too nice. Therefore, in the store you need to carefully consider checking the image.
If the crack appeared on the matrix, it means that it was mechanically exposed, which was the reason that she burst. Usually even on the TV turned off it is noticeable that the matrix is damaged. But sometimes there are cases that the crack can be detected, only turning on the TV to the network. There will be no image on the screen at all or only some part of it. Most often only color stripes are visible, and a part of the screen where the matrix cracked, completely black, as if with subteps.
Mechanical breakage can also occur against fluid from entering the device.
Dark circles on the matrix can be a factory marriage. And can manifest themselves due to dust or moisture in the body of the product. Usually such circles are easy to cleans.
But the matrix does not need to disassemble independently – you need to contact a specialist, otherwise damage may occur. Then, instead of inexpensive repair, you will have to “fork out” to buy a new matrix or TV.
It is worth remembering that small lights, light or dark stripes, stains, small in diameter, and even dark and glowing individual points may be present on TV screens. Even on expensive models. Each manufacturer has their tolerances for small defects. Therefore, the goal of the buyer is to find a TV without defects or with a minimum, almost inconspicuous eye.
Sometimes the matrices “burn out”. Burnout occurs in some places. Usually in those where blue or white colors are used more often. The main reason for this process is the life cycle of different light components is different, so the color rendition changes with the time.
Independently carry out the repair of the TV or monitor in the event of their breakdown is not recommended. If connected incorrectly, the matrix can burn. Contact a specialized service center.