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:
Mar. 01, 2011
Filed:
Jan. 25, 2007
Yasushi Tanijiri, Osakasayama, JP;
Ichiro Kasai, Toyonaka, JP;
Tetsuya Noda, Tenri, JP;
Hiroshi Yamaguchi, Suita, JP;
Yoshie Shimizu, Ibaraki, JP;
Yasushi Tanijiri, Osakasayama, JP;
Ichiro Kasai, Toyonaka, JP;
Tetsuya Noda, Tenri, JP;
Hiroshi Yamaguchi, Suita, JP;
Yoshie Shimizu, Ibaraki, JP;
Konica Minolta Holdings, Inc., Tokyo, JP;
Abstract
Variation of the wavelength of the light emitted from a light source is reduced by a wavelength variation reduction mechanism. Hence, wavelength deviation of the intensity peak of the light emitted from the light source from the diffraction-efficiency peak of a hologram optical element is reduced. Thus, even when a high-brightness light source is used, the light emitted therefrom can be diffracted with the hologram optical element efficiently. Moreover, the heat generated by the light source is efficiently rejected through the surface of a land portion of a flexible printed circuit, is then, via an insulating layer of the flexible printed circuit, efficiently absorbed through the surface of a heat absorbing member, and is then, via a shield conductor, led out of a casing, so as to be thereby expelled.