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:
Aug. 22, 2006
Filed:
Dec. 14, 2004
Manabu Kobayashi, Saitama, JP;
Tetsuji Suzuki, Yokosuka, JP;
Takatsugu Aizaki, Yokosuka, JP;
Ryusaku Takahashi, Yokosuka, JP;
Manabu Kobayashi, Saitama, JP;
Tetsuji Suzuki, Yokosuka, JP;
Takatsugu Aizaki, Yokosuka, JP;
Ryusaku Takahashi, Yokosuka, JP;
Victor Company of Japan, Limited, Kanagawa-ken, JP;
Abstract
An image display apparatus includes a diaphragm () arranged at a pupil position. The shape of an aperture of the diaphragm () is similar to the shape of a light source image formed by an illuminating optical system at the pupil position. An area varying mechanism () varies the area of the aperture of the diaphragm () in response to a focal length varying operation of a projection lens (). This prevents an excessive opening from being formed around a light source image cast by the illuminating optical system, thereby preventing the deterioration of displayed images due to unwanted light that may pass through the excessive opening.