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. 13, 2023
Filed:
Oct. 21, 2022
Nichia Corporation, Tokushima, JP;
Takuma Horiuchi, Yamanashi-ken, JP;
Takumi Miyashita, Yamanashi-ken, JP;
Kiyokazu Watanabe, Yamanashi-ken, JP;
NICHIA CORPORATION, Tokushima, JP;
Abstract
To provide a backlight that reduces the number of LEDs used while facilitating the attempt to make the backlight smaller in thickness. On a mount substrate (), LEDs () are mounted in a square lattice arrangement. Over a portion near the center of each unit of the square lattice, protrusions () of a diffusion plate () are disposed. Among light emitted from the LEDs (), light traveling in lateral directions between the mount substrate () and the diffusion plate () is captured by the protrusions (). The captured light is refracted and reflected by the interfaces of the protrusions (), and diffused due to diffusing particles, with the result that the light is turned into upward illumination light.