Apple's trackball Apple Pencil patent: Drawing on walls just became possible

Apple's trackball Apple Pencil patent: Drawing on walls just became possible

Apple just dropped a patent that could completely change how we think about the Apple Pencil. We're talking about a stylus that doesn't need an iPad screen—or really any screen at all. You could sketch on your desk, write on the wall, or even draw in mid-air. Let's break it down. What you need to know:Surface-free operation: The new Apple Pencil could work on any surface—or even hovering above it—using built-in optical sensors Trackball design: …