The first televisions appeared almost a hundred years ago, back in 1929, and were produced by one of the American companies. They produced an image that was no larger than a modern matchbox and was viewed using a large magnifying glass.
To receive a sound signal on such devices, a separate special receiver was used, which was tuned to a certain frequency. And only five years later, in 1934, their mass production began in Germany.
Description of TV matrix technologies in a simple way
There are 4 technologies in the modern world: PDP, LCD, OLED and QLED. Let’s try to describe each of the technologies without using an abundance of technical terms and incomprehensible words, but to explain everything in a simple language that is understandable to any layman, what types of TV screen matrices exist and which matrix is \u200b\u200bbest. And so let’s get started
PDP (Plasma Display Panel)
– it is also in the common people plasma, which at one time began to displace devices on a cathode ray tube (CRT). It was distinguished by the best image quality, primarily by the depth and brightness of the picture, as well as a large screen diagonal.
In such a screen, there was no need for backlighting, since the plasma cells acted as a light source. Despite its advantages, this technology has “sunk into oblivion”. This was due to the increased power consumption and the large size of such TVs. Also, certain defects associated with increased temperature began to appear, which led to the appearance of dim pixels (they burned out) and a shadow effect was formed near the silhouettes.
This technology is used in watches, calculators, various measuring instruments and, of course, TVs. In 1987, Sharp was one of the first to develop a liquid color crystal display. This technology is based on the polarization of the light flux, liquid crystals sifting light, passing only certain waves of the light beam.
With the help of electricity, the orientations of the molecules of the crystals are changed and thereby the creation of an image is ensured.
As a rule, such matrices consist of:
– color filter;
– film, which is used to close part of the matrix (front side);
– backlight, which is located on the back of the matrix;
– and of course the liquid crystals themselves
This technology had low power consumption, the devices themselves were light in weight and due to which they were in high demand. It is worth paying attention to the environmental aspect, mercury is used in TVs with LCD technology.
LED (light emitting diode)
– matrices based on LED illumination.
They have some improvements:
– for RGB matrices, a significant coverage of colors (good color reproduction);
– increased contrast;
– relatively low power consumption;
– small thickness and weight;
– low cost
These TVs last much longer than other similar technologies. Due to the fact that LEDs are light in weight, such TVs are lighter and thinner.
For the sake of justice, it should be noted that this technology is not without drawbacks and has a negative impact on the optic nerve and vision in general.
OLED (Organic light-emitting diode)
– organic LED. As the name implies, images on devices with this technology are formed by organic diodes. Diodes are capable of emitting light in a different color spectrum: green, blue, white and red. When “mixing” these colors, we get a rich, bright picture with many different shades and colors.
Advantages of OLED:
– excellent picture contrast;
– large viewing angle;
– no distortion;
– high-quality transmission of colors;
– reality pictures
The disadvantages include, first of all, the cost and short service life of LEDs.
QLED (Quantum-dot Light-Emitting Diode)
Quantum dots are crystals that glow when exposed to current or light. The researchers say quantum dot displays can have up to five times lower power consumption than conventional LCDs, as well as a longer lifespan than OLED displays. It is also claimed that the manufacturing cost could be half that of LCD and OLED displays.
The technology is based on the fact that pixels contain RGB subpixels (RGB – from the English words red – red, green – green, blue – blue).
let’s imagine QLED as a puff pastry that consists of several layers. First, the backlight is located, then the quantum dots, and finally the last layer is the liquid crystal matrix. Due to this, when changing the color of the frame, the image must remain sharp (that is, there will be no blur). QLED is one of the variations of the LED screen, but better.
How to determine the type of TV screen matrix
The easiest and most reliable way is to refer to the original source: the user manual or the official website of the manufacturer. Or a little easier, using any search engine, specifying the exact model and brand of the device, you will find a description of the technical characteristics, incl. and matrix type.
You can also find out the type of TV matrix by some indirect signs:
– for TN matrices, the image may deteriorate greatly if you change the color palette and contrast settings;
– if the shades of colors disappear when you look at the screen at a right angle, then most likely you are the owner of an MVA / PVA matrix;
– IPS-matrix is characterized by shades of purple and slight distortion when looking at black at a slight angle