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. 15, 2026
Filed:
Nov. 18, 2025
Applicant:
Japan Display Inc., Tokyo, JP;
Inventor:
Shouhei Itou, Tokyo, JP;
Assignee:
Japan Display Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21V 14/00 (2018.01); F21L 4/04 (2006.01); F21V 23/04 (2006.01); G02F 1/133 (2006.01); G02F 1/1335 (2006.01); G02F 1/1343 (2006.01); G02F 1/1347 (2006.01);
U.S. Cl.
CPC ...
F21V 14/003 (2013.01); F21L 4/04 (2013.01); F21V 23/04 (2013.01); G02F 1/13306 (2013.01); G02F 1/133612 (2021.01); G02F 1/134309 (2013.01); G02F 1/1347 (2013.01);
Abstract
A lighting device includes an optical element driving circuit portion and a first push switch connected to the optical element driving circuit portion. The optical element driving circuit portion generates a first signal having a first pulse wave and a second signal having a second pulse wave inverted in phase from the first pulse wave. Each time a push button of the first push switch is pressed, one of a plurality of input contacts is selected so as to be electrically connected to an output contact, and an amplitude of each of the first pulse wave and the second pulse wave is changed in a stepwise manner.