Laptops use OLED screens but they are actually flawed

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Tencent Digital (Wen Xin) According to the Digital Trends website, notebook display technology has not changed much in the past decades. In addition to very few early models in the 1980s, they generally use LED displays.

Over the years this has been a notebook advantage, but recently the LED display has been dragged down. Why do you say that? The LED display requires a backlight and it cannot be completely turned off (if it can be completely turned off, the user will not see the contents on the display at all). Even if the display shows dark black, the LED display will still glow.

TV fans are very dissatisfied with this, which is why plasma TVs are liked by home theater enthusiasts. At present, the "crown" of plasma TVs has been replaced by OLED TVs, and notebooks will also use OLED displays.

The naked eye can find the difference between the two

It is likely that readers have never seen OLED TVs or notebooks before (OLEDs are common on cell phones). The reader may want to know the gap between the OLED and the LED screen. The following figure illustrates this well:

The figure above is a comparison of the contrast between two configurations of OLED displays and the best two LED display notebooks. The difference is still quite large. When the OLED display shows a pure black image, Digital Trends is used to test the notebook's sensor - Datacolor's Spyder5 Elite, and the detected screen brightness is zero. Therefore, the value of the contrast depends on the maximum brightness of the display.

Do not be too excited. Although the original data show that the OLED screen contrast is much higher than the traditional LED screen. In fact, the advantage of contrast is limited because the contrast of the person's eyes and viewing content is also limited.

Digital Trends said that the user can notice the black level of the display. Gray seen in movies and television in the past was replaced by pure black. Users will even notice this in more trivial tasks. The display of web pages will suddenly become finer and more colorful, comparable to print magazines.

Battery life is an inadequacy

There is no doubt that OLED can significantly improve image quality. The two systems tested by Digital Trends - the Lenovo ThinkPad X1 Yoga and the Samsung TabPro S - are equipped with the best PC display. In addition to extremely high contrast, the OLED panel has a wider color gamut and a better gamma curve. Color accuracy is not the best we have ever seen, but it is not bad.

The Lenovo ThinkPad X1 Yoga proved to be the perfect OLED technology test stand because Digital Trends has tested models with OLED and non-OLED displays. The standard IPS LED screen resolution even reaches the level of the OLED screen, so the two are highly comparable.

The test results are clear and consistent. Depending on the load, the use of an OLED screen will shorten the battery life by 10%-25%. When running the Peacekeeper Internet surfing test program, the battery life is most affected. The background of the test process is white, so the brightness of the screen is very high; the impact on the battery life of the video test is minimal, which is understandable because there are many videos. Low brightness scene.

Why does battery life become shorter? According to the current state of the art, the energy consumption of a fully lighted OLED display is higher than that of an LED display. The OLED display does not require a backlight, and each pixel emits light. When all pixels emit light, the energy consumption of the OLED display will be much higher.

Digital Trends said that battery life is not an advantage of OLED displays, but this is not disastrous. If you switch to an OLED display, your laptop battery life may be reduced from 5 hours to 4 hours. For users who need 5 hours of battery life, this is definitely not good news, but it is not important for users who use a little longer than 3 hours.

Will you buy OLED notebooks?

Samsung TabPro S comes standard with an OLED display. However, it will increase the cost of notebooks. In X1 Yoga, the OLED display costs $125 (approximately RMB 836), and the HP Spectre x360 with an OLED display costs $1,500 (approximately RMB 10028). The alien version 13 of the OLED version costs 1,300 US dollars (approximately RMB 8,691).

Considering the purchase price of 600 US dollars (about 4011 yuan RMB) about ordinary users do not expect OLED screen. OLED displays are expensive and may not be used in mainstream notebooks for the next few years.

If you consider buying a high-end notebook, Digital Trends thinks OLED screens are worth considering—though it's expensive. As long as the notebook is used, the user cannot leave the screen. The screen is irreplaceable and it will not be outdated soon.

In fact, if you can choose between upgrading the OLED screen and the processor, it is best to choose to upgrade the OLED screen. Of course, the premise is that you don't care about sacrificing some battery life.

Source: Digital Trends

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