OLED-TVs: advantages and disadvantages of technology
Technologies / / December 19, 2019
Layfhaker versed in what feature of OLED-TVs, and clarifies the cases in which it is better to choose the OLED-display.
What is interesting OLED-technology?
OLED (organic light emitting diode) is called the future of TV technology, which promises vibrant colors, including deep black, and reduce motion blur.
It may seem that the new technology is not very different from the more common on the LED-panel market. But the word "organic" refers to the difference in the mode of representation of images on the screen.
What is the dignity of OLED-screens?
LED-display - liquid crystal display with improved LED backlight. In modern LCD-TVs, liquid crystal are rotated by the action of electricity and transmit light through each pixel of the image. Light passes through the filters (red, blue and green) and when mixed results in a color from the darkest to white. If all the crystals are rotated so as not to miss any of the three colors, then the output is black.
In crystals has its advantages: low cost, thinness and lightness of the materials, but there is a major drawback - the level of black. Crystals cover light, but the light continues to operate. Light falls on the "black" pixels, which makes a dark image faded.
The OLED-displays no backlight - each individual pixel emits light during a self-energizing it with the electric current. If the pixel does not get electricity, we see the lack of light - a true black.
Absolutely zero values for the color and luminance change the perception of contrast. In OLED-display, even a minimum quantity of light in the dark parts of the image perceived brighter compared to the LED-displays. Furthermore, the pixels in the OLED-screens may change color almost instantly, in contrast to delay LED-panels, for activation and movement crystals which requires more time.
Another advantage of OLED-technology, which is derived from the black level and contrast - rich colors realistic.
Burn out whether pixels on OLED-screens?
On older plasma TVs can burn out pixels in the parts of the screen, where a long time housed something static, such as a watermark or video menu. Traces of such objects could ever "imprinted" on the display, so manufacturers have added special tools in the TV settings so that it could be avoided.
For the OLED-screen is not the case, but if a static image is left on for several hours, it can "hang", leaving a faint trail for about an hour, and then completely disappear. Nothing wrong with the TV is not going to happen.
How bright OLED-displays?
If on TV a sticker Ultra HD Premium, its pixels must attain a minimum brightness threshold. This value may be different depending on the depth of black. If the level of black color in OLED-panel located somewhere between 0.0005 and 0.5 cd / m2, The maximum brightness for this TV should begin from 1000 cd / m2. But if the screen is capable of even more dark color, its maximum can start already from 540 cd / m2.
The brightness of the OLED-TV is seen depending on the place where you position it, so in the room with the bright light of the advantages of the screen OLED will not be much noticeable. Cheap OLED-panel give brightness level of 700-800 cd / m2While the LED-TVs are capable of more - 1 400-1 500 cd / m2.
This year appear new OLED-TV model c brightness up to 2000 cd / m2But their price is unlikely to please the customers.
At maximum screen brightness of 800 cd / m2 its advantages over LCD TVs visible at night or in low light with the curtains closed during the day. One has only to dim the lights, as the influence of the black color on the image quality becomes apparent.
However, a deep black color - it's not a magic force, transforming any movie on the screen. Sometimes, for example in strimingovyh services, the black color can not be coded as the complete absence of light, as well as his lighter option.
What disadvantages OLED-technology?
As in the case of the color display quality, motion blur reduction dependent on the initial content. In theory, OLED-technology is superior to LCD and LED-standards for the transmission of motion.
In practice, only specially prepared files and blur reduction mode leads to noticeable results. Dynamic movies with a frequency of 24 image frames per second will not work. At the same time quite difficult to find the video in the 4K-resolution, with realistic color and high frame rates at the same time, to justify the purchase of expensive OLED-panels.
OLED-TV buy or not?
So far, the answer for most buyers negative. If you do not need mandatory standards support HDR-10 or Dolby Vision, you can spend a much smaller amount for LED-equipped with a 4K-resolution, low smearing and delay input signal. You will not get the most juicy picture, but you can, for example, to get a good sound system.
If you still want to join the world HDR, Then in this case it is better to choose OLED-screen, but will have to calibrate it properly. For large rooms such TVs to buy unprofitable, but if you will not find more than 20 000 dollars in the 77-inch model LG.
Low levels of blur and bright color OLED-panels are also well suited for gaming, but it is necessary to take into account more high input signal delay which affects the responsiveness and control is particularly critical in the network games. This problem manufacturers have already started to solve the firmware update.
HDR-standard and OLED-technology will surprise you with image quality now, but appropriate content for them yet small.