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:
Nov. 23, 2010
Filed:
Nov. 26, 2008
Naotada Okada, Kanagawa-ken, JP;
Kazuo Horiuchi, Kanagawa-ken, JP;
Haruhiko Okumura, Kanagawa-ken, JP;
Takashi Sasaki, Kanagawa-ken, JP;
Naotada Okada, Kanagawa-ken, JP;
Kazuo Horiuchi, Kanagawa-ken, JP;
Haruhiko Okumura, Kanagawa-ken, JP;
Takashi Sasaki, Kanagawa-ken, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A head-up display optical film includes: a first optical layer configured to convert the polarization plane of incident light by 90 degrees; a second optical layer configured to convert the polarization plane of incident light by 90 degrees; and an intermediate optical layer sandwiched between the first optical layer and the second optical layer and having a refractive index that is different from the refractive index of the first optical layer and from the refractive index of the second optical layer.