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:
Jan. 27, 2015
Filed:
Jun. 25, 2014
U-shin Ltd., Tokyo, JP;
Izumi Dohi, Hiroshima, JP;
Kazuyuki Fukushima, Hiroshima, JP;
U-Shin Ltd., Tokyo, JP;
Abstract
Techniques reduce erroneous judgment due to effects of noise accompanying PWM control. LEDs light operating portions and function as indicators. Circuitry adjusts brightness of the LEDs through PWM control. A detecting circuit outputs detected values in accordance with electrostatic capacitances of the electrode. A CPU senses a touch operation when a difference between a detected value of the detecting circuit and a reference value is more than a prescribed value. The CPU stores a detected value as a reference value which is the first value detected by the detecting circuit after the PWM control execution state of the LEDs has been changed or the first value that is detected by the detecting circuit, which is comprised by a touch switch that is in a specified positional relationship with respect to the touch switch which executing state of PWM control of the LEDs has changed, after transition of the executing state.