专利检索 ap:("NORITAKE CO., LIMITED" OR "NORITAKE ITRON CORPORATION") AND inv:"Kazuhisa Shibata" 第 1 页

1.

发明授权
Method for lighting backlight of capacitive touch switch module 有权

公开(公告)号：US10778224B2

公开(公告)日：2020-09-15

申请号：US16290588

申请日：2019-03-01

申请人： NORITAKE CO., LIMITED , NORITAKE ITRON CORPORATION

发明人： Yukari Takeda , Toru Kohama , Kazuhisa Shibata

IPC分类号： H03K17/96

摘要： 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 backlight 6 is 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.