Technology development is massive. In recent years, it has gained momentum, and it is no longer easy for everyone to understand the new products that appear on the market. Everyone has long known LCD TVs, but few can explain this name of the device. In fact, the technology appeared a long time ago, not to mention when liquid crystals became known.
Abbreviation
So, as you already understood, today we will consider LCD TVs. If you have ever had to choose a similar technique or monitor, then you have often come across incomprehensible abbreviations such as LCD or LCD. What does it mean? And if it is easy to guess that LCD is liquid crystal, then not everyone knows what LCD is.
The last abbreviation is also related to our topic. In English, it stands for liquid crystal display, which in translation again brings us back to the liquid crystal display. That is, LCD and LCD are one and the same. Therefore, when choosing a TV, do not look for the difference between these concepts.
What is this?
This type of screen appeared first in simple electronics. It was used in the production of thermometers with a screen, players, watches, phones, etc. This type acquired a monochrome display, and received multicolor thanks to the RGB triad.
Now this display is used in a variety of devices. These are computer monitors, laptops, TVs, phones, cameras, e-books and more.
Over time, a display with a matrix appeared. Thus, a tool for controlling thin-film transistors was added to the screen. And TFT and other types of matrices began to be added to the LCD abbreviation.
Development
The LCD TV did not appear immediately. As early as 1888, liquid crystals were found. Already 40 years later, a technology was created that began to be used in modern displays. The first attempts to create such a screen were made in the 70s of the last century. RCA was able to produce a monochrome product based on this material.
This gave impetus to the active use of new items in various electronics. A color version of the LCD appeared in 1987. Sharp, now known for its TV models, has released a three-inch color screen.
The development of screens for laptops also contributed to the development of LCD displays. After applying the new technology, shortcomings were noticeable. Initially, black and white matrices were used. When we decided to try the color version, a lot came outproblems. The static picture looked tolerable, but the slightest movement blurred the images.
This is how active matrices appeared, which could correctly display moving objects on the screen. Soon mass production of monitors began. Already at the beginning of the 21st century, televisions began to appear, but in small sizes: up to 15 inches.
How it works
Explaining how a liquid crystal screen works is not easy. Especially for people who are not technically savvy. In order not to go into details that will completely confuse everyone, let's start with the elements.
Obviously, the display consists of several parts. They are conditionally represented by layers. There is an LCD display. Previously, it was a flat package with glass plates. Between the layers were liquid crystals. At the beginning of the 21st century, all internal elements were replaced with more flexible ones made using polymers.
The display has a light source that illuminates the picture. All this is enclosed in a case, and the electricity comes from the wires.
Of course, the component part of the screen does not end there. The LCD matrix can also be represented in parts. Its pixel has transparent electrodes, between which there is a layer of molecules. It all works with a pair of polarizing filters.
If this whole structure is at rest, that is, without applying voltage, the molecules are in an amorphous state. If electricity comes in, they line up in the direction of the electric field,distorting its original structure. A thin-film transistor is responsible for the color in the composition of the screen. It works on the RGB color scheme. Each pixel is born from three color cells. The difference in colors is affected by the magnitude of the electric charge.
Benefits
The device of a TV with a liquid crystal screen allowed such models to break into the leaders of sales. The first thing to note is the variety of sizes. If we compare displays with and without a kinescope, it becomes clear that the manufacturer has many opportunities to create all kinds of models.
The LCD panel is lightweight and takes up less space on your desktop. The new products have no problems with focusing. Thanks to the use of technology, flaws with clarity at high resolutions have also disappeared. Almost all LCD monitors have become digital. Therefore, the graphics card does not need to work with digital-to-analog conversions. But even in this case, manufacturers have learned how to deal with situations with unwanted artifacts if the monitor is connected to VGA.
As a result, we can say that such screens have become more economical both in terms of cost and in terms of occupied territory. They stopped "poisoning" the user with electromagnetic radiation. Annoying flickering has disappeared, and the screen area itself has noticeably expanded.
Flaws
But, of course, not everything is so smooth. There are problems that may not be noticeable to the average user, but they are also worth remembering. For example, image clarityonly achieved with a certain resolution. If you change it, then only through interpolation.
As for CRT monitors, LCDs don't have enough contrast and black depth. Below is the speed of changing the picture. Contrast depends on viewing angles. Often you have to deal with the replacement of the LCD screen on the TV, since most budget models are not protected from mechanical damage in any way. And if the matrix is not covered with a protective glass, then even a slight pressure leads to degradation.
Overview
However, at the moment it is the most popular type of display. It is not easy to choose a TV from the whole variety. Buyers face difficulties at the first stage - choosing a manufacturer.
But even if you skip this point and consider all the existing models on the market, you need to take a few individual parameters for yourself. For example, immediately determine the size of the screen. If you need a TV in the kitchen, 21 inches will be enough. If we are talking about the living room, then you can also purchase a 75-inch screen here.
Brightness and contrast settings are unlikely to help you, because on average everything looks the same. But the appearance may affect your decision. Here you already need to select models by color, design, etc.
Many try to pay attention to technical specifications. You can buy a regular TV that will just show TV shows and nothing more. There is an optionbuy a "smart" model that has access to the Internet, games and other useful features.
By 2017, the trend was determined by which users choose their model. It turned out that the majority prefers 40-43-inch displays. Samsung was the most popular manufacturer among all. Although LCD TVs from LG are not inferior to him.
Giant
It is not easy to review all existing models. In addition, each buyer is looking for something individual. But to tell about the most popular and attractive is real. So, relatively recently, a real giant appeared on the market - Samsung UE75ES9007U. This is a 75 inch LCD TV. Its resolution is 1920x1080 with an aspect ratio of 16:9.
The model supports digital and cable broadcasting of different systems. It has many interfaces for connecting additional devices: Ethernet, USB, D-Sub, audio output. There are gesture control technology, teletext, picture-in-picture, etc.
But you shouldn't expect anything else for such a diagonal and quality. Before us, almost frameless model with a large stand at the bottom. If you hang it on the wall, it seems that we have a picture hanging in the air.
Universal
LCD TV LG 43UH610V has become a popular universal model. To say that this is a budget model is difficult. Nevertheless, for such dimensions and functionality, it is practically for nothing.
This TV has a slightly larger bezel than the previous one. But the model still belongs to the unspoken class"frameless". She stands on two small legs. The diagonal, as the name implies, is 43 inches. The resolution is 4K, and this is perhaps the main advantage.
The TV has an advanced feature set. It works with Smart TV and is equipped with various technologies that affect both sound and picture quality. Got a lot of ports and connectors. In general, a worthy option for those who do not require much, but want a reliable model with wide functionality.
Care
Any technique requires maintenance. That's why you need to watch TV. In addition, situations are different. On the Internet, people often ask how to wipe the LCD TV screen. Someone easily copes with a wet rag, and then complains about problems with the device. To do this, it is better to read additional information.
There are several options for how to effectively clean the model from dirt and dust. The easiest is to purchase special napkins. They will help eliminate static electricity, cause no damage and are free from abrasives.
You can also use plain dry wipes or microfiber wipes. The latter cope well with dust, streaks and stains. You can moisten them with water.
Shops may offer a special spray. This liquid has no alcohol or allergens. In addition, according to the manufacturer, it covers the equipment with a special protective layer.
Rules
So that after such cleaning you do not need to take the device to the repair of LCD screensTVs, it is better to follow some rules. Remove dust preferably with a lint-free cloth. You can’t press on the screen, since not every matrix is protected by glass and can bend. Sprays and other liquids must not be splashed onto the screen. They need to be sprayed onto the fabric.
The napkin should not be very wet. To clean the dirt from the joints of the screen, you can take cotton swabs or swabs. Every time you need to use new wipes. And of course you can't clean while the TV is on.
Repair
Sometimes models get seriously damaged. Hence popular questions like: “If the liquid crystal screen is leaking, what should I do?” As practice shows, such a breakdown occurs more often due to mechanical damage. Sometimes situations are comical, for example, your cat decided to tag a device. All this also affects the performance of the screen.
You cannot fix such a breakdown on your own. You can, of course, find out the type of matrix and look for a replacement. But you still have to contact the service center to replace the display.
Conclusions
LCD TVs have long entered our lives. Now millions use such models. They have become more beautiful, more compact, better quality. Manufacturers annually develop new technologies to make monitors show a good picture.
Choosing such a TV is not difficult. You need to calculate the amount you can spend on, then decide on the screen size and, possibly, choose a manufacturer. And then the matter is small.
