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:
Apr. 04, 2017
Filed:
Feb. 09, 2015
Konica Minolta, Inc., Tokyo, JP;
Norio Maeda, Moriguchi, JP;
Kohei Wataru, Sakai, JP;
Kazuhiko Inoue, Sakai, JP;
Masahiro Terada, Osaka, JP;
Takashi Ohta, Amagasaki, JP;
Yasumasa Sawai, Yamatotakada, JP;
KONICA MINOLTA, INC., Tokyo, JP;
Abstract
A projection type image display apparatus () comprises a focus correction system (). The system includes a temperature detection mechanism () for measuring temperature in the vicinity of a projection lens group (), a correction amount calculation unit () for calculating a correction amount for correcting the focus shift caused by a temperature change, and a driving signal generation unit () for generating, based on the correction amount, a driving signal for driving a focus adjustment mechanism (). If the user performs a focus adjustment using a focus operation input unit (), a focus operation determination unit () determines that a focus adjustment has occurred independently of the focus correction system and changes a correction condition stored in a memory ().