If you go to a store selling consumer electronics, then with a high degree of probability you can see at least one TV with an OLED display. It is because of the technology of making the screen such a device will be very expensive. But why? What are the features of such a display? The answer is in this article.
Please note that OLED technology in its true form is mainly used for the production of large-sized LCD panels. That is, to meet such screens most often possible on TVs. In portable electronics, AMOLED displays are commonly used, which, by the way, are very similar in general terms. But OLED-screen is typical for smart watches and fitness bracelets.
Like the traditional LCD-display, OLED-panel consists of a set of pixels, which form the picture. However, a cheaper competitor has a backlit layer, but there is no such element here. Instead, each pixel is essentially an organic light-emitting diode, which can emit light independently. That is, the brightness of the OLED screen is adjusted pixel-by-pixel. At IPS-or TFT-panel in any case, the entire area is illuminated by the backlight, because of which the contrast is far from ideal.
OLED displays consist of a certain number of thin organic films between two conductors. It is the supply of voltage to the conductors that causes the screen to emit light. This design allows you to bend the display without much difficulty - some manufacturers have already shown panels that can be twisted into a tube. This must be the future of OLED TVs. It remains only to figure out how to achieve flexibility from the processor, memory, motherboard and other components.
Subpixels on color OLED panels can have a different arrangement. Now the most popular are three schemes:
- The first is traditional, when the picture is formed using three organic LEDs - red, green and blue.
- The second option involves the use of blue emitters and special fluorescent materials that convert shortwave radiation into longwave - green and red colors.
- The third model is used less frequently, losing in terms of energy efficiency - such an OLED screen involves the use of three white emitters, the light from which then passes through color filters.
Be that as it may, the structure of the matrix does not play a big role - in any case, the screen will please with excellent color reproduction, high contrast and smaller thickness.
The main advantages of OLED
There are many reasons why OLED displays will become more and more popular.
In particular, such matrices have the following advantages:
- The picture has no distortion at any angle;
- The absence of a separate backlit layer has a positive effect on energy consumption;
- Such screens have a minimum thickness, and therefore the physical dimensions of the final device are reduced;
- Contrast is almost perfect, because when showing black colors, the backlight is almost completely extinguished;
- OLED technology allows you to display more colors.
None of the technologies for the production of LCD displays is ideal. If we talk about OLED, then the following limitations come to mind:
- It is much more difficult to buy a device with such a screen due to the very high cost (in this case, this is not about wearable electronics, but TVs);
- Early OLED-displays sinned short blue LEDs, ranging from two to three years - now this problem is almost completely solved (including programmatically, when other colors gradually begin to adapt to the weakened fellow).
AMOLED vs OLED
If you make a comparison with the AMOLED-matrix, then special differences can not be seen. The fact is that these are actually two technologies under one name. Just OLED-screen, as described above, can display a picture in many ways. AMOLED also implies a single technology, and such displays are strictly compact, which allows their use only in portable electronics.
Also, it should be noted that AMOLED screens are produced in sufficient quantities only by Samsung . As for OLED, various technological giants create their screens using this technology. However, these words are true only in the case of OLED-panels for wearable electronics. If we talk about large-size displays for TVs, here LG Electronics holds the palm.
Devices with OLED screen
This technology is not new. The first screens based on it were made many years ago. But for a long time, such panels had a limited set of colors, and more often the displays were completely monochrome. Color matrices began to be used relatively recently - mainly TVs are endowed with such panels. Most often this is a very expensive model, the price tag of which varies from 150 thousand to 1.5 million rubles.
Another category of products where the OLED screen is regularly found is wearable gadgets. In particular, now for very little money you can buy smart watches and fitness bracelets. Such devices need such a display to reduce thickness and reduce power consumption. Standard IPS-screen can not be used in these gadgets, otherwise the battery charge will melt before your eyes. Mi Band 2. Само собой, экран здесь является монохромным. The most popular fitness bracelet with an OLED display is the Xiaomi Mi Band 2. Of course, the screen here is monochrome. But this does not prevent the device from showing all the most necessary information.
Well, smartphones with OLED-display actually do not exist. Almost all manufacturers, without exception, have relied on AMOLED - a proprietary technology from Samsung. And this is despite the fact that in the early 2000s there were button phones with an OLED display. Apparently, many companies have not been able to start production of such screens in a compact form factor on an industrial scale. And there was not much point in this, because IPS-displays were much cheaper, which had a positive effect on the price tag of the final device.
Predicting the further development of OLED technology is extremely difficult. Based on her screens already know how to display almost perfect picture. Now the matter is small - to start mass production of several companies at once, which would lead to competition and lower prices for final products. Then OLED-displays will begin to appear in those TVs, the cost of which does not make you grab your heart.