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:
Jul. 29, 2025
Filed:
Sep. 13, 2024
Darfon Electronics Corp., Taoyuan, TW;
Yi-Jui Pan, Taoyuan, TW;
DARFON ELECTRONICS CORP., Taoyuan, TW;
Abstract
A circuit board includes a substrate having a plurality of through-openings, a plurality of coupling members disposed on the substrate and configured to connect to a keycap, a switch circuit disposed on the substrate and having switch pads for triggering a keyswitch signal in response to the keycap moving toward the substrate, a lighting circuit disposed on the substrate at a side opposite to the coupling members, and an illuminant electrically connected to the lighting circuit. The switch pads and illuminant arranged such that their vertical projections fall within an area surrounded by the plurality of coupling members. A keyboard includes the switch circuit, the lighting circuit, a light guide sheet, and at least one keycap, such that light from the illuminant enters the light guide and propagates transversely to illuminate the at least one keycap.