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    • 6. 发明申请
    • PHOTODETECTOR AND SPATIAL INFORMATION DETECTING DEVICE USING THE SAME
    • 照相机和空间信息检测装置使用它
    • US20100141927A1
    • 2010-06-10
    • US12448615
    • 2007-12-27
    • Yusuke HashimotoFumi TsunesadaKenji ImaiYuji Takada
    • Yusuke HashimotoFumi TsunesadaKenji ImaiYuji Takada
    • G01C3/08H01L27/148H01L31/09
    • H01L27/14887H01L27/14812
    • A photodetector capable of improving dynamic range for input signals is provided. This photodetector includes a photoelectric converting portion, a charge separating portion, a charge accumulating portion, a barrier electrode formed the charge separating portion and the charge accumulating portion, and a barrier-height adjusting portion electrically connected to the barrier electrode. Undesired electric charges such as generated when environment light is incident on the photoelectric converting portion are removed by the charge separating portion. A potential barrier with an appropriate height is formed under the barrier electrode by applying a voltage to the barrier electrode according to an electric charge amount supplied from the charge separating portion to the barrier-height adjusting portion. Electric charges flowing from the charge separating portion into the charge accumulating portion over the potential barrier are provided as an output of the photodetector.
    • 提供能够改善输入信号的动态范围的光检测器。 该光检测器包括光电转换部分,电荷分离部分,电荷累积部分,形成电荷分离部分和电荷累积部分的势垒电极,以及与阻挡电极电连接的势垒高度调节部分。 当环境光入射到光电转换部分时产生的不期望的电荷被电荷分离部分除去。 通过根据从电荷分离部向阻挡高度调节部供给的电荷量向阻挡电极施加电压,在阻挡电极下形成具有适当高度的势垒。 作为光电检测器的输出,提供从电荷分离部分流过势垒上的电荷累积部分的电荷。