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    Optical proximity sensor with improved dynamic range and sensitivity
    2.
    发明授权
    Optical proximity sensor with improved dynamic range and sensitivity 有权
    光学接近传感器具有改善的动态范围和灵敏度

    公开(公告)号：US08692200B2

    公开(公告)日：2014-04-08

    申请号：US12652912

    申请日：2010-01-06

    Applicant: Qian Tao ,  Gek Yong Ng ,  Richard Lum

    Inventor： Qian Tao ,  Gek Yong Ng ,  Richard Lum

    IPC: G01J5/20

    CPC classification number: G01J1/46 ,  G01J1/28 ,  G01J5/08 ,  G01J5/0896 ,  G01J5/20

    Abstract: Various embodiments of an optical proximity sensor and corresponding circuits and methods for measuring small AC signal currents arising from the detection of pulsed AC light signals emitted by a light emitter and reflected from an object to detected in the presence of larger ambient light DC current signals are disclosed. Circuits and corresponding methods are described that improve the dynamic range, sensitivity and detection range of an optical proximity sensor by cancelling the contributions of DC current signals arising from ambient light signals that otherwise would dominate the detected small AC signal currents. The DC signal cancellation occurs in a differential amplifier circuit before small AC signal currents are provided to an analog-to-digital converter. The circuits and methods may be implemented using conventional CMOS design and manufacturing techniques and processes.

    Abstract translation: 光接近传感器的各种实施例以及相应的电路和方法，用于测量由在较大的环境光直流电流信号的存在下由光发射器发射并从物体反射以检测的脉冲AC光信号产生的小AC信号电流， 披露 描述了通过消除由环境光信号产生的DC电流信号的贡献来改善光学接近传感器的动态范围，灵敏度和检测范围的电路和相应方法，否则将主导检测到的小AC信号电流。 在将小的AC信号电流提供给模数转换器之前，在差分放大器电路中发生DC信号消除。 电路和方法可以使用传统的CMOS设计和制造技术和工艺来实现。

    Optical Proximity Sensor with Improved Dynamic Range and Sensitivity
    3.
    发明申请
    Optical Proximity Sensor with Improved Dynamic Range and Sensitivity 有权
    具有改进的动态范围和灵敏度的光学接近传感器

    公开(公告)号：US20110163233A1

    公开(公告)日：2011-07-07

    申请号：US12652912

    申请日：2010-01-06

    Applicant: Gek Yong Ng ,  Qian Tao ,  Richard Lum

    Inventor： Gek Yong Ng ,  Qian Tao ,  Richard Lum

    IPC: G01J5/20

    CPC classification number: G01J1/46 ,  G01J1/28 ,  G01J5/08 ,  G01J5/0896 ,  G01J5/20

    Abstract: Various embodiments of an optical proximity sensor and corresponding circuits and methods for measuring small AC signal currents arising from the detection of pulsed AC light signals emitted by a light emitter and reflected from an object to detected in the presence of larger ambient light DC current signals are disclosed. Circuits and corresponding methods are described that improve the dynamic range, sensitivity and detection range of an optical proximity sensor by cancelling the contributions of DC current signals arising from ambient light signals that otherwise would dominate the detected small AC signal currents. The DC signal cancellation occurs in a differential amplifier circuit before small AC signal currents are provided to an analog-to-digital converter The circuits and methods may be implemented using conventional CMOS design and manufacturing techniques and processes.

    Abstract translation: 光接近传感器的各种实施例以及相应的电路和方法，用于测量由在较大的环境光直流电流信号的存在下由光发射器发射并从物体反射以检测的脉冲AC光信号产生的小AC信号电流， 披露 描述了通过消除由环境光信号产生的DC电流信号的贡献来改善光学接近传感器的动态范围，灵敏度和检测范围的电路和相应方法，否则将主导检测到的小AC信号电流。 在将小的AC信号电流提供给模数转换器之前，在差分放大器电路中发生DC信号消除。电路和方法可以使用传统的CMOS设计和制造技术和工艺来实现。

    Optical disc recorder
    5.
    发明申请
    Optical disc recorder 有权
    光盘刻录机

    公开(公告)号：US20020100861A1

    公开(公告)日：2002-08-01

    申请号：US10058435

    申请日：2002-01-30

    Inventor： Atsushi Ogawa ,  Tomoaki Hirai

    IPC: G01J001/32

    CPC classification number: G11B7/126 ,  G01J1/28 ,  G11B7/0045

    Abstract: An error detector circuit compares a value corresponding to a laser power supplied from a monitor diode of an optical pickup with a value representative of a target laser power, and outputs an error from the target value to a change-over switch. The change-over switch selects one of low-pass filters used for CAV recording and CLV recording. The low-pass filer used for CAV recording has a larger time constant than that of the low-pass filter used for CLV recording. The servo gain of a servo loop during the CAV recording is therefore set smaller than that of a servo loop during the CLV recording. A change in the laser power becomes gentle.

    Abstract translation: 误差检测器电路将对应于从光学拾取器的监视二极管提供的激光功率的值与表示目标激光功率的值进行比较，并将误差从目标值输出到转换开关。 切换开关选择用于CAV录制和CLV录制的低通滤波器之一。 用于CAV记录的低通滤波器具有比用于CLV记录的低通滤波器的时间常数更大的时间常数。 因此，在CAV记录期间，伺服环路的伺服增益因此设置为小于CLV记录期间伺服环路的伺服增益。 激光功率的变化变得温和。

    Image pickup apparatus capable of reducing influence of flicker, method of controlling the same, and storage medium
    7.
    发明授权
    Image pickup apparatus capable of reducing influence of flicker, method of controlling the same, and storage medium 有权
    能够减少闪烁的影响的摄像装置，控制其的方法以及存储介质

    公开(公告)号：US09578255B2

    公开(公告)日：2017-02-21

    申请号：US14755860

    申请日：2015-06-30

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Yuuzou Aoyama

    IPC: H04N5/235 ,  G01J1/42

    CPC classification number: H04N5/2357 ,  G01J1/0228 ,  G01J1/28 ,  G01J1/4214 ,  H04N5/2353 ,  H04N5/335

    Abstract: An image pickup apparatus capable of reducing influence of flicker while suppressing delay of start of photographing. An image pickup device and a photometric sensor pick up images of an object. A CPU obtains images by controlling driving of one of the device and the sensor to perform charge accumulation and charge readout. Further, the CPU detects a flicker frequency and a flicker phase of a flicker light source, and stores them in a memory as first information. When photographing, if the CPU determines that the first information is not valid, an ICPU obtains images by controlling driving of the other of them to perform charge accumulation and charge readout. Further, the ICPU detects the flicker frequency and the flicker phase and stores them in a memory as second information. The CPU controls exposure timing according to the second information to perform photographing.

    Abstract translation: 一种能够抑制闪烁的影响同时抑制拍摄开始的延迟的摄像装置。 图像拾取装置和光度传感器拾取对象的图像。 CPU通过控制设备和传感器之一的驱动来获得图像，以执行电荷累积和电荷读出。 此外，CPU检测闪烁光源的闪烁频率和闪烁相位，并将它们作为第一信息存储在存储器中。 当拍摄时，如果CPU确定第一信息无效，则ICPU通过控制另一个信息的驱动来获得图像，以执行电荷累积和电荷读出。 此外，ICPU检测闪烁频率和闪烁相位，并将它们作为第二信息存储在存储器中。 CPU根据第二信息控制曝光定时以执行拍摄。

    IMAGE PICKUP APPARATUS CAPABLE OF REDUCING INFLUENCE OF FLICKER, METHOD OF CONTROLLING THE SAME, AND STORAGE MEDIUM
    8.
    发明申请
    IMAGE PICKUP APPARATUS CAPABLE OF REDUCING INFLUENCE OF FLICKER, METHOD OF CONTROLLING THE SAME, AND STORAGE MEDIUM 有权
    可减少闪光灯影响的图像拾取装置，控制其的方法和存储介质

    公开(公告)号：US20160006919A1

    公开(公告)日：2016-01-07

    申请号：US14755860

    申请日：2015-06-30

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Yuuzou Aoyama

    IPC: H04N5/235 ,  G01J1/42 ,  H04N5/378

    CPC classification number: H04N5/2357 ,  G01J1/0228 ,  G01J1/28 ,  G01J1/4214 ,  H04N5/2353 ,  H04N5/335

    Abstract: An image pickup apparatus capable of reducing influence of flicker while suppressing delay of start of photographing. An image pickup device and a photometric sensor pick up images of an object. A CPU obtains images by controlling driving of one of the device and the sensor to perform charge accumulation and charge readout. Further, the CPU detects a flicker frequency and a flicker phase of a flicker light source, and stores them in a memory as first information. When photographing, if the CPU determines that the first information is not valid, an ICPU obtains images by controlling driving of the other of them to perform charge accumulation and charge readout. Further, the ICPU detects the flicker frequency and the flicker phase and stores them in a memory as second information. The CPU controls exposure timing according to the second information to perform photographing.

    Abstract translation: 一种能够抑制闪烁的影响同时抑制拍摄开始的延迟的摄像装置。 图像拾取装置和光度传感器拾取对象的图像。 CPU通过控制设备和传感器之一的驱动来获得图像，以执行电荷累积和电荷读出。 此外，CPU检测闪烁光源的闪烁频率和闪烁相位，并将它们作为第一信息存储在存储器中。 当拍摄时，如果CPU确定第一信息无效，则ICPU通过控制另一个信息的驱动来获得图像，以执行电荷累积和电荷读出。 此外，ICPU检测闪烁频率和闪烁相位，并将它们作为第二信息存储在存储器中。 CPU根据第二信息控制曝光定时以执行拍摄。

    Image reading device, computer readable medium, and light amount adjusting method
    9.
    发明授权
    Image reading device, computer readable medium, and light amount adjusting method 有权
    图像读取装置，计算机可读介质和光量调节方法

    公开(公告)号：US08367997B2

    公开(公告)日：2013-02-05

    申请号：US12420852

    申请日：2009-04-09

    Applicant: Hideo Takeuchi

    Inventor： Hideo Takeuchi

    IPC: H01L27/00 ,  G01J1/20

    CPC classification number: G01J1/28 ,  H04N1/40056

    Abstract: An image reading device has: a light source at which plural light-emitting elements are arrayed; a detection unit that detects light amounts of illumination light which are emitted from the light-emitting elements and are reflected by a reference plate; a derivation unit; and an adjustment unit. On the basis of detected light amounts, the derivation unit derives difference amounts between a reference value and average values of light amounts per predetermined first number of adjacent light-emitting elements. On the basis of the derived difference amounts, the adjustment unit adjusts light amounts per the first number of light-emitting elements such that the average values become the reference value.

    Abstract translation: 图像读取装置具有：排列有多个发光元件的光源; 检测单元，其检测从所述发光元件发射并被参考板反射的照明光的光量; 推导单位; 和调整单元。 基于检测到的光量，导出单元根据每个预定的第一数量的相邻发光元件导出参考值和光量的平均值之间的差值。 基于导出的差量，调整单元调整每第一数量的发光元件的光量，使得平均值成为基准值。

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