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发明公开
CN104205020A 光传感器 失效 - 权利终止

光传感器
摘要：
本发明提供一种光传感器。在基板(2)的表面(2A)设置有3个发光元件(3)～(5)和1个感光元件(6)。信号处理电路(11)的运算处理部(15)从来自感光元件(6)的光检测信号(S0)分离出3个反射光信号(Sr1)～(Sr3)。运算处理部(15)使反射光信号(Sr2)偏移，并且对反射光信号(Sr1)、(Sr2)的波形整体的差分的平方和进行运算。运算处理部(15)根据该运算值为最小时的偏移量(x21)，来运算出反射光信号(Sr1)、(Sr2)的相位差(T21)。基于相同的处理，运算处理部(15)运算出反射光信号(Sr2)、(Sr3)的相位差(T32)。运算处理部(15)根据相位差(T21)、(T32)，来确定被检测物体(Obj)的移动方向。
摘要（英）：

Three light-emitting elements (3)-(5) and one light-receiving element (6) are disposed on the surface (2A) of a substrate (2). An arithmetic processor (15) of a signal processing circuit (11) separates three reflected light signals (Sr1)-(Sr3) from a photodetection signal (S0) from the light-receiving element (6). The arithmetic processor (15), while shifting the reflected light signal (Sr2), computes the sum of squares of the difference between the waveforms in their entirety for the reflected light signals (Sr1), (Sr2). The arithmetic processor (15) computes a phase difference (T21) between the reflected light signals (Sr1), (Sr2) on the basis of the amount of shift (x21) when the operation value decreases. Based on the same processing, the arithmetic processor (15) computes a phase difference (T32) between the reflected light signals (Sr2), (Sr3). The arithmetic processor (15) identifies the direction of movement of an object to be detected (Obj) on the basis of the phase differences (T21), (T32).

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