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:
Feb. 26, 2019
Filed:
Nov. 29, 2016
Konica Minolta, Inc., Tokyo, JP;
Masayuki Imaoka, Izumiotsu, JP;
Konica Minolta, Inc., Tokyo, JP;
Abstract
A projection display apparatus includes: a micromirror device that reflects light on an image display surface to emit image light; a prism unit that bends an optical path of the image light emitted from the micromirror device; and a projection optical system that includes a diaphragm and that projects the image light emitted from the prism unit onto a screen, wherein the image display surface is formed with a plurality of micromirrors, and an image is formed on the image display surface through ON/OFF control on a tilt of a surface of each of the micromirrors and intensity modulation on incident light, the prism unit has an air gap tilted at a predetermined angle with respect to a principal ray of the image light emitted from the center of the image display surface, and the image light emitted from the micromirror device passes through the air gap.