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:
Feb. 04, 2020
Filed:
Feb. 07, 2018
Seiko Epson Corporation, Tokyo, JP;
Wataru Yasumatsu, Azumino, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
An illumination device of the invention includes a light source unit including light emitting devices having light emission surfaces, a collimating system having collimating lenses provided to respectively correspond to the light emitting devices of the light source unit, into which lights from the respective light emitting devices enter, a collecting lens into which the lights output from the collimating lenses enter, and a rod lens having a light incident end surface into which the light collected by the collecting lens enters. The light source unit and the collimating system are adapted so that a principal ray of the light output from the light emission surface corresponding to a part of the light emitting devices of the light source unit may enter a position separated from an optical axis of the collimating lens corresponding to the part of the light emitting devices of the light source unit.