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:
Jan. 08, 2008
Filed:
Aug. 08, 2003
Adrianus Johannes Stephanes Maria DE Vaan, Eindhoven, NL;
Adrianus Johannes Stephanes Maria De Vaan, Eindhoven, NL;
Koninlijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The invention relates to a projection device for projecting an image, comprising an illumination means () having an entrance () for entering light from a light source, a polarization-selective mirror () for transmitting a first polarization component () of the light to a display panel () and reflecting a second component () back to the illumination means (), and a display panel () for selecting colour components of the first polarization component for projection at a projection means (). The display panel comprises a dichroic filter means () for filtering colour components of the first polarization component () and a controllable reflective means () for changing the state of polarization of the filtered colour components depending on a control signal and for reflecting the filtered colour components back to the polarization-selective mirror (). All light that is reflected from the dichroic filter means () and the controllable reflective means () back to the polarization-selective mirror (), having an unchanged state of polarization, is transmitted back to the illumination means (). The reflected light having a changed state of polarization is reflected to the projection means () for projection.