We understand what is special about OLED TVs and finds out when it is better to choose an OLED screen. Read on to find out more.
Why is OLED technology interesting?
OLED (organic light-emitting diode) is called the future of television technology, which promises rich colors, including deep blacks, and reduced motion blur. It may seem that the new technology is not much different from the more common LED panels on the market. But the word “organic” implies a difference in the way images are presented on the screen.
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What are the advantages of OLED screens?
LED screen – Liquid crystal display with enhanced LED backlighting. In modern LCD TVs, liquid crystals rotate under the influence of electricity and transmit light through every pixel in the image. Light passes through filters (red, blue, and green) and, when mixed, results in colors ranging from darkest to white. If all crystals are rotated not to miss any of the three colors, then the output is black.
Crystals have their advantages; low cost, thinness, and lightness of materials, but there is also an important disadvantage – the black color level. The crystals block the light, but the backlight continues to work. The light falls on the “black” pixels, which makes a dark image appear faded.
OLED screens have no backlighting – each pixel emits light on its own when an electric current is applied to it. If the pixel does not receive electricity, then we see the absence of light – real black.
Absolute zero values for color and brightness alter the perception of contrast. On an OLED display, even the smallest amount of light in the darker parts of the image is perceived brighter than LED displays. Also, pixels in OLED screens can change color almost instantly, unlike LED panels, which take longer to activate and move.
Another advantage of OLED technology derives from the black level, and contrast is realistically saturated colors.
Do pixels burn out on OLED screens?
On older plasma TVs, pixels could burn out in those parts of the screen where something static was located for a long time, such as a channel logo or a video game menu. Traces from such objects could be permanently “imprinted” on display, so manufacturers added special tools to the TV settings to avoid this.
This is not typical for OLED screens, but if a static image is left for several hours in a row, it can “freeze,” leaving a barely noticeable trail, for about an hour, and then completely disappear. Nothing bad will happen to the TV.
How bright are OLED displays?
If the TV has an Ultra HD Premium sticker, its pixels must reach the minimum brightness threshold. This value can vary depending on the depth of the black. If the black level in an OLED panel is somewhere between 0.0005 and 0.5 cd / m 2, then the maximum brightness for such a TV should start from 1000 cd / m 2. But if the screen is capable of an even darker color, its maximum can start from 540 cd / m 2.
The brightness of an OLED TV is perceived depending on where you place it, so in a bright room, the benefits of an OLED screen won’t be noticeable. Inexpensive OLED-panels produce brightness at the level of 700-800 cd / m 2, while LED-TVs are capable of more – 1,400-1,500 cd / m 2.
This year there will be a new OLED-TV model c brightness up to 2000 cd / m 2, but the price is unlikely to please buyers.
At maximum screen brightness of 800 cd / m, 2 of its advantages over LCD TVs visible at night in low light or day with curtains closed. As soon as you dim the light, the effect of black on image quality becomes obvious. However, deep blacks are not the magic that transforms any movie on the screen. Sometimes, black can be encoded in streaming services not as a complete absence of light but as its lighter version.
What are the disadvantages of OLED technology?
As with color rendering quality, motion blur reduction depends on the original content. In theory, OLED technology surpasses LCD and LED standards for motion transmission.
In practice, only specially prepared files and blur reduction mode produce noticeable results. Dynamic movies with an image rate of 24 frames per second will not work. At the same time, it isn’t easy to find 4K video with realistic colors and high frame rates at the same time, to justify the purchase of an expensive OLED panel.
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Should I buy an OLED TV or not?
So far, for most buyers, the answer is no. If you don’t need the mandatory HDR-10 or Dolby Vision support, then you can spend much less on a 4K LED TV with low blur and low input lag. You will not get the juiciest picture, but you can, for example, get a good audio system.
If you still want to join the world of HDR, then, in this case, it is better to choose an OLED screen, but you have to calibrate it properly. For large rooms, these TVs are not profitable to buy unless you have more than $ 20,000 for a 77-inch LG model.
The low blur and vibrant colors of OLED panels are also good for gaming, but consider the higher input latency, which affects responsiveness and is especially critical in online gaming. Manufacturers have already begun to solve this problem with firmware updates.
HDR and OLED technologies will surprise you with image quality right now, but there is still little content suitable for them.
Adapted and translated by Wiki Avenue Staff
Sources: Life hacker