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发明授权
CN104584434B 光传感器和电子设备 有权

光传感器和电子设备
摘要：
光传感器(101)包括：驱动电路(8)，其以在第一期间、第二期间和第四期间使发光元件(LED)断开，另一方面在第三期间使发光元件(LED)导通的方式进行驱动；积分电路(1)，其输出第一积分值差和第二积分值差，其中第一积分值差为第一期间与第二期间的根据发光元件(LED)的各自的状态产生的受光元件(PD)的光电流的积分值之差，第二积分值差为第三期间与第四期间的根据发光元件(LED)的各自的状态产生的光电流的积分值之差；和输出控制电路(3)，其在第一积分值差为零时输出第二积分值差，另一方面在第一积分值差不为零时输出第二积分值差与第一积分值差之差。
摘要（英）：

An optical sensor includes: a driving circuit that turns off a light-emitting element during a first period, a second period, and a fourth period and that turns on the light-emitting element during a third period; an integrating circuit that outputs a first integrated-value difference (FID) and a second integrated-value difference (SID), the FID being a difference between an integrated value of a photocurrent generated by a light-receiving element in accordance with respective states of the light-emitting element during the first period and the second period, the SID being a difference between an integrated value of a photocurrent generated in accordance with respective state of the light-emitting element during the third period and the fourth period; and an output control circuit that outputs the SID when the FID is zero and that outputs a difference between the SID and the FID when the FID is not zero.

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