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    OPTICAL SENSOR CIRCUIT, TWO-DIMENSIONAL COORDINATE DETECTION APPARATUS, INFORMATION PROCESSING APPARATUS, AND METHOD OF REFRESH-DRIVING OPTICAL SENSOR ELEMENT
    1.
    发明申请
    OPTICAL SENSOR CIRCUIT, TWO-DIMENSIONAL COORDINATE DETECTION APPARATUS, INFORMATION PROCESSING APPARATUS, AND METHOD OF REFRESH-DRIVING OPTICAL SENSOR ELEMENT 审中-公开
    光传感器电路，二维坐标检测装置，信息处理装置以及刷新光传感器元件的方法

    公开(公告)号：US20120250033A1

    公开(公告)日：2012-10-04

    申请号：US13512946

    申请日：2010-11-05

    申请人： Hideki Kitagawa ,  Takuya Watanabe ,  Hajime Imai ,  Yukihiko Nishiyama ,  Atsuhito Murai ,  Kazunori Morimoto

    发明人： Hideki Kitagawa ,  Takuya Watanabe ,  Hajime Imai ,  Yukihiko Nishiyama ,  Atsuhito Murai ,  Kazunori Morimoto

    IPC分类号： G01B11/14

    CPC分类号： G06F3/0428

    摘要： An optical sensor circuit in accordance with the present invention detects, based on a change in the amount of light received when a pointer (P) is placed in a coordinate detection area (2) through which light from a light source (3) passes, coordinates of a position of the pointer (3) in the coordinate detection area (2). A first optical sensor circuit including an optical sensor element (41), which receives a larger amount of light due to its position relative to the light source (3), has a first wire to which a refresh signal (Shield_A) is supplied, the refresh signal (Shield_A) initializing a threshold characteristic that determines light sensitivity of the optical sensor element (41); whereas a second optical sensor circuit including an optical sensor element (42), which receives a smaller amount of light, has a second wire to which a refresh signal (Shield_B) is supplied independently of the refresh signal (Shield_A), the refresh signal (Shield_B) initializing a threshold characteristic of the optical element (42).

    摘要翻译： 根据本发明的光学传感器电路基于当将指示器（P）放置在来自光源（3）的光通过的坐标检测区域（2）中时接收的光量的变化来检测， 坐标检测区域（2）中的指针（3）的位置的坐标。 包括由于其相对于光源（3）的位置而接收更大量的光的光学传感器元件（41）的第一光学传感器电路具有提供刷新信号（Shield_A）的第一布线， 刷新信号（Shield_A）初始化确定光学传感器元件（41）的光灵敏度的阈值特性; 而包括接收较少光量的光学传感器元件（42）的第二光学传感器电路具有第二导线，独立于刷新信号（Shield_A）提供刷新信号（Shield_B），刷新信号（Shield_A），刷新信号 Shield_B）初始化光学元件（42）的阈值特性。