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. 06, 2024
Filed:
May. 19, 2021
Fujifilm Corporation, Tokyo, JP;
Satoshi Kuniyasu, Minamiashigara, JP;
Ryosuke Shimizu, Minamiashigara, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
A plant growth lighting fixture has two or more of a blue light source, a green light source, and a red light source and a reflective-type circularly polarizing plate having two or more of a blue-reflecting cholesteric liquid crystal layer having a center wavelength of an effective wavelength range in blue light, a green-reflecting cholesteric liquid crystal layer having a center wavelength of an effective wavelength range in green light, and a red-reflecting cholesteric liquid crystal layer having a center wavelength of an effective wavelength range in red light. The wavelength ranges of the emission center wavelengths as the light sources and the wavelength ranges of the center wavelength of the effective wavelength range as the reflective-type circularly polarizing plate are wavelength ranges of the same colors, and the reflective-type circularly polarizing plate has a polarization correction layer having a phase difference in a thickness direction.