Mitsubishi Electric Research Laboratories, Inc.

Mitsubishi Denki Kabushiki Kaisha

Johnny Chung Lee

Ramesh Raskar

Paul H Dietz

Darren L Leigh

Daniel Maynes-Aminzade

An interactive display system includes a pixel-based display surface and a light pen. A sequence of patterns is projected onto the display surface. The sequence of patterns has a unique sequence of light intensities for each location of the display surface. Intensities of light at an arbitrary location are sensed by the light pen while projecting the sequence of patterns. The intensifies of light are decoded to determine coordinates of the arbitrary location.

Light pen system for pixel-based displays

A system determines correspondence between locations on a display surface and pixels in an output image of a projector. The display surface can have an arbitrary shape and pose. Locations of known coordinates are identified on the display surface. Each location is optically coupled to a photo sensor by an optical fiber installed in a throughhole in the surface. Known calibration patterns are projected, while sensing directly an intensity of light at each location for each calibration pattern. The intensities are used to determine correspondences between the locations and pixels in an output image of the projector so that projected images can be warped to conform to the display surface.

Growing community of inventors

Pittsburgh, PA, United States of America

Johnny Chung Lee