What is led-technology in monitors
For many years, computer monitors were created forthe same principle as television sets. The differences, of course, were, but rather, an evolutionary nature. For example, the size of the point (grain) of the monitors was much smaller than that of the TVs, and the frequencies of the line and frame scans differed. This can also be attributed to a high resolution. Still, not too much, as we would like. However, progress does not stand still, therefore, a new image output technology was proposed, which made a quiet revolution in the field of television and monitor building. Now outside the 21st century window, and monitors on liquid crystals (TFT, LCD, led display) finally settled on the tables of computer owners.
The basis of such a monitor is a matrix. In fact, it is a huge field of thousands of pixel points with a control scheme. Since the matrix does not emit light, it is impossible to directly see the image on it. To do this, you need to send a stream of light to it, either from the front (this is how screens of calculators work, or hours), or to shine through it. "Frontal" lighting is used in specific devices, in monitors - through. There are two ways to implement it: fluorescent lamps and diodes (read further, if you do not know what a led).
Gas-discharge lamps are familiar to everyone, these are thosethe most luminous tubes in supermarkets and their successors are household "economical" lamps. For monitor illumination, miniature versions of tubes are used, with improved color gamut and increased frequency (and you thought LCD monitors do not flicker? This is confusing!). At present, this technological branch is actively supplanted by a more progressive one. This can be easily verified by reading the words "led screen" on most boxes with monitors in stores. Often and choose, especially, not from anything - all on this technology.
It is understandable interest of buyers to the question ofwhat is led. The word "led" is an abbreviation from English, meaning "diode emitting light." Fluorescent backlight lamps are replaced by LED lines. In budget models, they are placed on the sides of the matrix, and a uniform filter is used to obtain uniform illumination.
A person who is interested in what a led, with respect to monitors, should have an idea of the advantages and, alas, the shortcomings of this technology.
As already mentioned, the backlight flickers. This is due to the gas-discharge nature of the generation of the light flux. True, the frequency is so high that the eye is not fixed (about 400 Hz). In turn, the diodes are spared this disadvantage.
The consumed electric power of the lamps is several times higher than that of the diodes. A clear advantage.
Often a buyer who knows what a led is,chooses such a monitor because of its smaller size. The thickness of the screen does not usually exceed 20 mm. Advantage is rather controversial, however it sometimes pushes to the choice of just such models.
However, LED backlighting technology, in comparison withlamp, there is a significant drawback - a narrow light spectrum. Because of this, the color rendering quality suffers. For the same reason, many owners of led-monitors quickly get tired when working at a computer. On the forums in the network, entire branches are being created with a discussion of this problem. If desired, they can easily be found and familiarized with the described situations. In general, monitors on liquid crystals are a rather ambiguous solution. Although they are considered less harmful to eyesight, when switching from CRT to LCD, almost all at first note the discomfort, until the return to the tested device. With led history repeats itself. Although no one calls the exact reason, there is an occasion to think about. At a minimum, we can recommend the purchase of a medium-to-high-price led monitor, in which the backlighting lines consist of colored diodes and are placed evenly behind the matrix, and not along its edges.
