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:
Jan. 20, 2015
Filed:
Nov. 21, 2013
Seiko Epson Corporation, Tokyo, JP;
Tsukasa Funasaka, Nagano, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
An optical filter includes first and second substrates, first and second mirrors and first and second electrodes. The second substrate includes first, second and third surfaces. The second surface surrounds the first surface in a plan view, and the third surface surrounds the second surface in a plan view. A second height of the second surface is lower than a first height of the first surface, and a third height of the third surface is higher than the first height of the first surface. The first, second and third surfaces face a single flat surface of the first substrate. The first mirror is disposed on the first substrate. The second mirror is disposed on the first surface of the second substrate. The first electrode is disposed on the first substrate. The second electrode is disposed on the second surface of the second substrate and faces the first electrode.