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:
Apr. 01, 2025
Filed:
May. 02, 2024
Minebea Mitsumi Inc., Nagano, JP;
Tomotaka Horikawa, Kitasaku-gun, JP;
Kota Matsunaga, Kitasaku-gun, JP;
MINEBEA MITSUMI Inc., Nagano, JP;
Abstract
A planar illumination device of an embodiment includes a light guide plate for emitting light incident from a light incident side surface from one principal surface of two principal surfaces, and a plurality of light sources arranged in a longitudinal direction of the light incident side surface and emitting light incident on the light incident side surface. The light sources include a light emitting element for emitting first light and a wavelength conversion material for emitting second light having a wavelength longer than a wavelength of the first light by the light emitted by the light emitting element. The light incident side surface is formed with a plurality of rows of first irregularities extending in a width direction of the light guide plate and diffusing incident light in a thickness direction of the light guide plate in a partial range in the thickness direction of the light guide plate, the range opposing the light emitting element.
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