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    • 51. 发明申请
    • FOCUS DETECTION APPARATUS, METHOD OF DRIVING THE SAME AND CAMERA SYSTEM
    • 聚焦检测装置,其驱动方法和相机系统
    • US20080002958A1
    • 2008-01-03
    • US11751974
    • 2007-05-22
    • Daisuke InoueHidekazu Takahashi
    • Daisuke InoueHidekazu Takahashi
    • G03B3/00
    • G03B13/36G02B7/346
    • A low cost and high speed AF sensor is realized by increasing AF speed without providing a sensor dedicated for a large de-focusing AF. The AF sensor has two sensors each including a plurality of photoelectric conversion elements and detects a focus based on signals read from the sensors. The two sensors each includes a plurality of linear sensors 11 to 13. The two sensors each has a plurality of accumulation controlling circuits (PB detection circuits 14 to 16 and accumulation decision circuits 17 to 19) for controlling the accumulation time of the photoelectric conversion elements and a plurality of scanning circuits (shift registers 21 to 23) for reading out output signals from the photoelectric conversion elements. The AF sensor has a first mode in which the accumulation time of each linear sensor in the two sensors is independently controlled to independently read a signal output and a second mode in which the accumulation time of the linear sensors in the two sensors is collectively controlled to read a signal output.
    • 通过增加AF速度实现低成本和高速AF传感器,而不需要提供专用于大型去焦AF的传感器。 AF传感器具有两个传感器,每个传感器包括多个光电转换元件,并且基于从传感器读取的信号来检测焦点。 两个传感器各自包括多个线性传感器11至13.两个传感器各自具有多个累积控制电路(PB检测电路14至16和累积判定电路17至19),用于控制光电转换元件的累积时间 以及用于读出来自光电转换元件的输出信号的多个扫描电路(移位寄存器21〜23)。 AF传感器具有第一模式,其中独立地控制两个传感器中的每个线性传感器的累积时间,以独立地读取信号输出和第二模式,其中两个传感器中的线性传感器的累积时间被集中控制到 读取信号输出。