Apple is continuing to refine its work on light sensors that could work through a display, likely for use in a future version of Face ID or Touch ID on an iPhone. Credit: AppleInsider Current iPhone models, like the iPhone 12 and iPhone 12 Pro series, house their Face ID system and sensor suite in a notch at the top of the display. Apple, however, is working on a system that could ultimately allow it to minimize or nix the notch entirely. In a patent application published March 4 and titled "Sensing System for Detection of Light Incident to a Light Emitting Layer of an Electronic Device Display," Apple lays out a system to embed a light detection layer in the display stack. "In particular, light sensors associated with the light sensing system can be distributed around or within an active display area of the display," the patent reads.