Optical tablet stylus and indoor navigation system

摘要

Optical user input technology comprises three-dimensional (3D) input sensors and 3D location emitters to enable high-precision input in a 3D space, and the 3D location emitter may be a stylus or other writing or pointing device. Certain implementations may comprise an orientation assembly for transmitting orientation of the 3D location emitter in addition to location within a 3D space, and some implementations may also use selectively identifiable signaling from the 3D location emitters to the 3D input sensors to distinguish one 3D location emitter from another, to transmit data other data from a 3D location emitter to a 3D location sensor, or as a means of providing orientation information for the 3D location emitter with respect to the 3D location sensor. Also disclosed are position fixing, indoor navigation, and other complementary applications using 3D input sensors and/or 3D location emitters.

主权项

1. A three-dimensional (3D) touch-type input system for a computing device, the system comprising:
three infrared (IR) emitters fixedly coupled to an input device for emitting three IR signals; two position sensors fixedly coupled to the computing device configured to receive the three IR signals emitted from the three IR emitters, each of the two position sensors configured to sense two two-dimensional (2D) directions for each of the three IR signals emitted from the input device, the two position sensors combinedly sensing six 2D directions; and a processor configured to use the six 2D directions sensed by the two position sensors to determine at least one of an orientation of the input device, or a 3D position of a tip of the input device in a volume of space above a major surface of the computing device.