The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 02, 2008
Filed:
Nov. 07, 2003
Paul H. Dietz, Hopkinton, MA (US);
Darren L. Leigh, Belmont, MA (US);
Ramesh Raskar, Cambridge, MA (US);
Johnny Chung Lee, Pittsburgh, PA (US);
Paul H. Dietz, Hopkinton, MA (US);
Darren L. Leigh, Belmont, MA (US);
Ramesh Raskar, Cambridge, MA (US);
Johnny Chung Lee, Pittsburgh, PA (US);
Mitsubishi Electric Research Laboratories, Inc., Cambridge, MA (US);
Abstract
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.