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:
Sep. 04, 2012
Filed:
Mar. 01, 2011
Akeo Kasakura, Minato-ku, JP;
Kazuhiko Kagawa, Yokkaichi, JP;
Naoto Kijima, Yokohama, JP;
Mitsubishi Chemical Corporation, Tokyo, JP;
Abstract
An illuminating device comprises one or more luminescent devices (). The luminescent device comprises a semiconductor light emitting element () emitting a excitation light having an peak within a wavelength range from 350 nm to 430 nm, and a luminescent part () comprising a sealing member () and a phosphor () absorbing the light from the semiconductor light emitting element () and emitting a light with different emission spectrum. For the luminescent device (), an excitation light contribution degree ΔE, an index quantitatively representing what extent of a visible component of the excitation light is involved in color mixing of a combined light of the luminescent device (), is 0.005 or less, and a mean color rendering index Ra is 70 or more.