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:
Jun. 14, 2011
Filed:
May. 25, 2007
Mitsuhiro Wada, Kyoto, JP;
Shinya Sannohe, Osaka, JP;
Yoshimasa Fushimi, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A projection type display apparatus includes: a rotary color filterhaving color filtersR,G andB that transmit particular colors of light of white light emitted from a light-emitting surface; a spatial light modulatorthat is disposed so as to be in substantially a conjugate relationship with the light-emitting surface, and modulates incident light from the rotary color filter, so as to display an image; and a control devicethat controls rotation of the rotary color filter so as to be in synchronization with the image display by the spatial light modulator. With respect to partial display regions, . . . of the spatial light modulator that correspond respectively to partial light-emitting regions, . . . defined by dividing the light-emitting surface, the control device switches each of the partial display regions, . . . between a normal image display state and an OFF state for cutting off light, in synchronization with passing of boundary linesandbetween each pair of adjacent ones of the color filters of the rotary color filter over each of the partial light-emitting regions, . . . . Thus, the efficiency of using illumination light by the spatial light modulator is improved, and it is possible to achieve an increased color luminance of a projected image, while sufficiently maintaining an effect of preventing color mixing from being caused by adjoining color filters.