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, 2020
Filed:
Mar. 01, 2019
Applicants:
Noritake Co., Limited, Aichi, JP;
Noritake Itron Corporation, Mie, JP;
Inventors:
Assignees:
NORITAKE CO., LIMITED, Aichi, JP;
NORITAKE ITRON CORPORATION, Mie, JP;
Primary Examiner:
Int. Cl.
CPC ...
H03K 17/96 (2006.01);
U.S. Cl.
CPC ...
H03K 17/9622 (2013.01); H03K 2217/960755 (2013.01); H03K 2217/960785 (2013.01);
Abstract
To provide a method for lighting a backlight of a capacitive touch switch module in which driving of the backlight hardly affects sensitivity of a touch switch. An electrical noise generated when a LED backlightis driven is suppressed by at least one of (1) setting timings of turning on and/or turning off of pulse waveforms for light emitting diode backlights in a pulse modulation system not to be the same but to be different from each other, and (2) lengthening a time necessary for at least one of rising and falling of the pulse waveform in the pulse modulation system.