One Advantage to Concave Displays for Smartphones: Reducing Reflections

Display expert Raymond M. Soneira:

Introducing a slightly curved cylindrically concave screen is a very important and major innovation in Smartphone display technology — very far from being a marketing gimmick as has been widely reported. The Galaxy Round screen curvature is very subtle, just 0.10 inches away from flat, which is similar to the slight curvature in a handheld magnifying mirror. But that small curvature is the key to a series of optical effects that result in significantly reducing interference from reflected ambient light by a large factor. It substantially improves screen readability, image contrast, color accuracy, and overall picture quality, but can also increase the running time on battery because the screen brightness and display power can be lowered due to the reduced light interference from ambient light reflections.

But that’s for a concave display. Bloomberg’s report regarding Apple’s supposedly forthcoming displays describes “larger displays with glass that curves downward at the edges” — downward sounds like convex, not concave. It’s possible that Bloomberg’s source is describing a design where the display is flat but the glass surface above the display tapers at the edge of the device.

★ Monday, 11 November 2013