![]() ![]() ![]() During our review period (spanning several days) we did not encounter any apparent afterglow as a result of contrast-rich display contents. Static elements - for example the task bar or various menu bars - are quite common when operating a Windows computer, so burn-in and memory effects could potentially be an issue. Watching movies can result in the opposite: depending on the situation - take a look at the scene "Movie (2)" from Star Wars below - the OLED display can actually be the more efficient and should be at least equal to the IPS display. Taking into account that the OLED display consumes about as much as the IPS display only at 45 % and below, the user consequently can expect a shorter battery life. As long as the percentage of white areas is minimal, even raising the display brightness to 300 cd/m² doesn't really affect the power requirements, while a completely white background at 198 cd/m² resulted in a healthy power draw of 8.7 watts.ĭuring browsing and word processing tasks, 50 to 70 % white on average is realistic in our opinion. As we mentioned before, this is independent of the display content.įor the OLED display we measured a slightly higher minimum consumption of 1.9 watts, which fluctuated according to brightness as well as the content. At 2 cd/m² we showed a consumption of about 1.5 watts, at 150 cd/m² about 3.9 watts and at 240 cd/m² about 5.2 watts. The IPS panel shows a nearly linear correlation between power consumption and brightness. To determine the power consumption and efficiency of both the IPS and OLED displays, we recorded the differences between an active and inactive display for various usage scenario for each of the notebooks. The profiles we created during our attempts all exhibited a bluish cast and lightening of darker areas - likely a software issue, since the panel should lend itself to a calibration quite nicely thanks to the outstanding color gamut. Unfortunately we weren't able to improve the results via a calibration. Although the color temperature is a little too low in either case, the presets certainly produce respectable results, as the average DeltaE-deviations of 3.1 ( ColorChecker sRGB) respectively 3.8 (ColorChecker AdobeRGB) clearly show. In addition to the default option ("Native"), there is another one called "Standard" (roughly corresponding with the sRGB color space) and "Photo Pro" (approximately equivalent to the AdobeRGB color space). The higher saturation would be an issue while working in the smaller sRGB color space, so Lenovo supplies different color profiles, which can be selected via right-clicking on the desktop. At times, the color gamut surpasses the very demanding AdobeRGB standard - for example for the colors red, yellow, and magenta. This is not to say that the panel looks overly saturated - even at high saturation levels of 80 and 100 %, the differences are still noticeable. The following picture of a Star Wars scene unfortunately can only show that to a limited extent, as neither our camera nor normal displays are able of adequately reproducing the dynamic range an OLED display is capable of.Īs far as the colors are concerned, "eye-catching" hits the nail on the head - such vivid colors are a rarity among IPS displays. Movies like Star Trek, Interstellar or Gravity almost look better on the 14-inch Yoga then they do on an LCD TV three times the size. The picture floats seamlessly in space and the resulting immersion is simply phenomenal. In completely dark surroundings, the difference is quite dramatic when watching movie scenes with lots of contrast: even the best IPS displays depict blacks as slightly gray, but OLED displays don't show any differences, so the black bars on top are not noticeable in a completely dark scene. What doesn't appear that exciting at first, actually has quite an impact during everyday use: in dimmer environments, an OLED display looks more saturated, more vivid and live-like than any IPS panel could. The resulting black value 0.00015 cd/m² is too low to be measured or confirmed by the naked eye: in a completely dark room, black is simply black - and that even at maximum brightness. ![]() OLED displays on the other hand are in an entirely different league: the manufacturer claims a contrast ratio of 2000000:1. The black areas of high-end IPS panels still emit light at one one-thousandth of the backlight-luminance - so at 300 cd/m², that's still accounts for about 0.3 cd/m². ![]()
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