A little over fifteen years ago, new types of televisions began to appear. Until that time, people used indicating devices built on the same principle. The characteristics of new products are becoming higher, the quality is better. Consider a brief overview - a variety of basic, most common types of TVs, indicating the strengths and weaknesses available.
Content
CRT TVs
Televisions with a cathode ray tube, or, as they are commonly called, kinescope televisions (although this is not the only type of televisions equipped with a kinescope), have long been considered standard and were ubiquitous. Although they are reliable, they cannot be compared in quality with displays based on advanced technologies. Every year, the production of CRT TVs is reduced.
Advantages
Some time ago, this point would have been extensive, since there were no decent alternatives to CRT TVs. Now we can distinguish only one significant advantage - low cost. Otherwise, cathode ray tube televisions are losing to more modern designs.
disadvantages
One of the main disadvantages of CRT screens is their size and weight. Even devices with a small screen diagonal can weigh 5-10 kilograms and take up a lot of space.
Other disadvantages include:
- high power consumption;
- insufficiently clear image quality;
- fire hazard due to the use of ultrahigh voltages and heating electrical elements;
- a cathode ray tube is a source of radiation and magnetic fields that are unfavorable to human health.
Projection Televisions
The desire to increase the screen diagonal of CRT televisions led to the development of projection televisions. In them, the image using optical systems was enlarged to the required size.
At the time, this type of TV was popular as home cinema systems.
Advantages
- large screen size;
- reduced energy consumption compared to CRT models.
disadvantages
By cons, characteristic of all televisions with picture tubes, projection ones have several additional disadvantages:
- excessively large size and weight;
- narrow viewing angle;
- costly maintenance.
LCD TVs
Years of research, development and improvement of the most sophisticated technology of liquid crystals have led to a real revolution in the production of television sets. Stylish flat panels appeared on the market, which began to differ from their predecessors both externally and many times surpass them in all respects. The disappeared need to use a bulky picture tube allowed to produce models of various shapes and designs - for every taste.
The novelty quickly gained universal popularity.
Advantages
- high-quality clear image;
- light weight;
- increased sweep frequency - no flicker;
- acceptable viewing angle;
- lack of electromagnetic radiation.
disadvantages
- poor saturation of black creates glare when viewed in rooms with bright lighting;
- Long response times can cause blur.
LED TVs
In fact, these are the same liquid crystal panels with the same characteristics and having only a few differences. They are due to design features - the screen backlighting is carried out not with the help of lamps, but with the use of LED LED-matrix.
- The main difference is the best black saturation, which makes the image look more attractive.
- LED backlighting is more reliable. In the event of a breakdown, it is easier to replace than lamps.
- Electricity consumption is almost one and a half times lower than standard LCD TVs of the same size.
To date, this type of TV is the most common throughout the world.
Plasma panels
At its core, the plasma panel is a huge number of microscopic transparent capsules filled with special gases, which have a unique property - to glow during an electric discharge. Each pixel of such a screen contains three capsules of different colors at once: red, green and blue. Depending on which of the gas cells the TV controller supplies voltage, it will glow in this color.
Advantages
Plasma devices are the most advanced. They have a clear contrast image, an unusually wide viewing angle and high durability. By design features they are equipped with a widescreen screen, which allows you to view movies with the highest resolution.
disadvantages
The “plasma” has few disadvantages, and all of them are not significant for the average consumer. So, they consume more energy compared to LCD counterparts. But in a modern house full of diverse equipment, this remains almost invisible.
Another significant drawback is the high cost, because of which not everyone can afford to purchase this type of TV. The presence of additional functions (built-in Android-console, 3D) makes them even more expensive.
Progress on the development of more advanced types of TVs does not stop today. There are already new generations of laser projection technologies that will soon be able to change ideas about television devices.
