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:
Mar. 23, 2004
Filed:
Jun. 20, 2002
Simon Magarill, Cincinnati, OH (US);
Todd S. Rutherford, Cincinnati, OH (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
Illumination systems ( ) are disclosed which provide scrolling progressive color change on a liquid crystal panel ( ), such as a LCoS panel. The systems use transmissive color filters ( ) which form an assembly ( ) which is rotated about a rotation axis ( ). Incident light from a light source ( ) passes through the filters and reflects from a reflecting surface ( ). As a result of this reflection, the system's optical axis ( ) is turned from an orientation substantially perpendicular to the rotation axis to an orientation which does not intersect a filter. Such turning of the optical axis allows colored light to be easily removed from the assembly and avoids problems with color mixing at boundaries between filters as occurs for systems in which light passes through two filters.