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公开(公告)号：KR1020140084817A
公开(公告)日：2014-07-07
申请号：KR1020120154733
申请日：2012-12-27
Applicant: 삼성전자주식회사
CPC classification number: H04N5/3745 , G01S7/4914 , G01S17/89
Abstract: A depth pixel of a three-dimensional image sensor comprises a light detection unit, an ambient light removing current source, a driving transistor, and a selection transistor. The light detection unit generates a light current based on received light reflected from a subject. The ambient light removing current source generates a compensation current for removing an ambient light component included in the received light in response to a power supply voltage and at least one compensation control signal. The driving transistor amplifies an effective voltage corresponding to the sum of the light current and the compensation current. The selection transistor outputs the amplified effective voltage as depth information in response to a selection signal.
Abstract translation: 三维图像传感器的深度像素包括光检测单元，环境光去除电流源，驱动晶体管和选择晶体管。 光检测单元基于从被摄体反射的接收光产生光电流。 环境光去除电流源响应于电源电压和至少一个补偿控制信号产生用于去除接收的光中包括的环境光分量的补偿电流。 驱动晶体管放大对应于光电流和补偿电流之和的有效电压。 选择晶体管响应于选择信号输出放大的有效电压作为深度信息。
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