公开(公告)号：US20140043287A1

公开(公告)日：2014-02-13

申请号：US13926034

申请日：2013-06-25

Applicant: ALPS ELECTRIC CO., LTD.

Inventor： Satoshi NAKAJIMA ,  Satoshi HAYASAKA ,  Shinichi ENDO

IPC: G06F3/041

CPC classification number: G06F3/0418 ,  G06F3/044

Abstract: Provided is an input device including a coordinate input unit having plural capacitance detection units, a capacitance measurement unit that measures capacitance for each of the plural capacitance detection units, and performs an AD conversion on the measured capacitance to output the converted capacitance as a measurement signal, and a control unit that controls the capacitance measurement unit, calculates a data signal by arithmetically operating the measurement signal, stores the data signal in association with coordinate information of the capacitance detection unit, and outputs a control signal. The control unit calculates a difference value between a predetermined reference value and the data signal at a constant time interval, performs a weighted average process on the data signal and the predetermined reference value to update and store a value on which the process is performed as a new reference value, and changes a weight given to the weighted average process.

Abstract translation: 提供了一种输入装置，包括具有多个电容检测单元的坐标输入单元，测量多个电容检测单元中的每一个的电容的电容测量单元，并且对所测量的电容进行AD转换，以输出转换的电容作为测量信号 以及控制电容测量单元的控制单元，通过算术运算测量信号来计算数据信号，将数据信号与电容检测单元的坐标信息相关联，并输出控制信号。 控制单元以恒定时间间隔计算预定参考值和数据信号之间的差值，对数据信号和预定参考值执行加权平均处理，以更新和存储执行该处理的值作为 新的参考值，并改变给予加权平均过程的权重。