This Apple patent shows a stylus that can draw on any surface and even in midair
Apple has filed a patent for a stylus that works on any surface, not just touch-sensitive ones, and would allow users to also draw doodles in midair. The patent application describes a pen that can be monitored by a force sensor in the tip or tracked using motion and orientation sensors, a camera, or “an electromagnetic- or sound-based triangulation scheme.” That could mean your computer would wirelessly monitor the stylus from multiple positions to determine its location in 3D space.
The pen can be used to generate text or 3D drawings. For example, you could draw a 3D cylinder in midair, and have the drawing appear on a computer screen while you work, so you’re not limited to a 2D plane. The concept of drawing in midair makes it sound…
