Lab – The impressive anti-reflective treatment of the Lenovo Yoga 7i Carbon touchscreen

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During testing, the ultraportable Lenovo Yoga 7i Carbon is equipped with a touchscreen with an anti-glare treatment so effective we didn’t think it was tactile. Assessment under the gloss meter, which measures the reflectance of the tiles.

For a few years now Digital, we test the ability of our devices’ screens to reflect light using a gloss meter. First started on smartphones, this measure has been extended to TVs, monitors and laptops. Thus, all laptops that pass through our lab are also subjected to the gloss meter to determine the reflection rate of their screen and therefore its gloss. This measurement is also an integral part of the monitor’s score, in the same way as the colorimetry or contrast ratio. Yes, what could be more annoying than constantly adjusting your screen to limit the reflections from the light sources that surround you?

The anti-reflective treatment of the Lenovo Yoga 7i Carbon enables the panel to reflect just under 18% of the light.

© The Digital

Thus, this percentage of reflection generally varies between 10 and 60% depending on the type of panel used and the presence of an anti-reflection treatment applied by the manufacturers, 100% corresponding to a mirror. In this game, gaming laptops and their matte panels generally fare best, with reflection rates below 20%; then the glossy panels are exposed to a more or less effective anti-reflective treatment, with 20 to 30% light reflection. Above 40% light reflection, we are dealing with a shiny panel without effective treatment.

lenovo yoga 7i carbon

The Lenovo Yoga 7i Carbon panel is actually tactile on our model.

© The Digital

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A matte and tactile panel

The Lenovo Yoga 7i Carbon, which is currently being tested in the lab, has a “PureSight” IPS panel that displays 2560 x 1600 px with a refresh rate of 90 Hz. It’s also tactile, something we hadn’t noticed. In fact, instead of having a glass overlay on the screen to make the plate tactile, the Yoga 7i Carbon has an integrated plate, like a non-touch screen, with a slight offset between the edges and the plate. Lenovo’s French office, contacted on this matter, was unfortunately on vacation and we were unable to obtain data on the technology used. The only information we could get hold of is the manufacturer of the IPS panel: CSOT, which is none other than the manufacturer of panels for TCL, and which belongs to the latter.

lenovo yoga 7i carbon touchscreen puresight

The integration of the tactile overlay is invisible.

© The Digital

Switching to the gloss meter confirms our first impressions with a light reflection rate worthy of the best matte panels with just 17.78% reflected light, while the Asus Zenbook S 13 Oled tested a few weeks ago tops out at 51.66% reflected light.

Lenovo Yoga 7i Carbon Asus ZenBook S 13 Oled reflective anti-reflective treatment

On the left Lenovo Yoga 7i Carbon; on the right Asus ZenBook S 13 OLED.

© The Digital

This is therefore a good point for the Lenovo Yoga 7i Carbon, which offers touch without its disadvantages, namely the reflections and the weight of the glass overlay. The test of the ultraportable of 970 g follows its course and will be read very soon Digital.

Asus ZenBook S 13 OLED (2022)

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This is how the price table works

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