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:
Jun. 18, 2019
Filed:
Apr. 14, 2017
Seiko Epson Corporation, Tokyo, JP;
Akinori Yamada, Ina, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
A resonator includes: a resonator element that includes a base portion and a resonating arm; and a base. When n is one natural number of 2 or greater and j is 1 or greater and a natural number which is less than or equal to n, the resonator element performs resonations with n inherent resonation modes. In a relationship between arbitrary integers kand resonance frequencies fcorresponding to the n inherent resonation modes, respectively, when frepresents the resonance frequency of the main resonation of the resonator element and a normalized frequency difference Δf is defined by a relationship of |Δf|≥0.03 is satisfied. The arbitrary integers ksatisfy relationships of 3≤Σ|k|≤10 and n≤Σ|k|. A ratio of an amount of a change in the resonance frequency of the main resonation, to excitation power that electrically excites the main resonation, is 20 [ppm/μW] or higher.