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US 2014/0232699 A1Published application
Interactive Projection System with Actuated Stylus
AssigneeMicrovision, Inc.
InventorsP. Selvan Viswanathan, Roeland Collet
Life of this patent
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Abstract
An actuated stylus conditionally occludes or exposes a reflector. The actuation mechanism may be mechanical, electrical, or a combination. When the reflector is occluded and the stylus is in the field of view of an interactive projection, no light is reflected back to the projection system. When the reflector is exposed, light is reflected back to the projection system. The reflector may be exposed in a time coded sequence to encode information such as a stylus ID and user action.
Claims24
A stylus comprising:
- a reflective element disposed at one end of the stylus;
- and
- an actuating mechanism to conditionally expose the reflective element.
An interactive projection system comprising:
- a scanning laser projector that scans a modulated laser beam to paint an image;
- a photodetector to detect reflections of the laser beam;
- and
- a processing element configured to recognize a sequence of reflections as having emanated from a stylus.
1 more element
A method comprising:
- exposing a reflector at an end of a stylus in response to a user action, wherein the reflector is configured to reflect a scanning laser beam when exposed.
Dependencies are inferred from the claim text.