公开(公告)号：US20120138777A1

公开(公告)日：2012-06-07

申请号：US13388505

申请日：2010-06-17

Applicant: Eric K. Larson ,  Matthew C. Webster ,  Jian Hong Kang ,  Matthew J. Grimes

Inventor： Eric K. Larson ,  Matthew C. Webster ,  Jian Hong Kang ,  Matthew J. Grimes

IPC: H01L31/167

CPC classification number: H01L31/167 ,  G01D5/2448 ,  G01J1/18

Abstract: An optical-interrupter provides a mechanically integrated electric light source and electric light sensor positioned across a gap to transmit a light beam across the gap that may be interrupted with an opaque vane. The optical-interrupter uses conventional LEDs for both the light source and a light receiver. An integrated circuit comparator may be used to provide an adjustable threshold for the determination of whether the light beam is blocked.

Abstract translation: 光学断续器提供机械地集成的电光源和电光传感器，其位于跨越间隙的位置，以透过可能被不透明叶片中断的间隙的光束。 光断续器使用传统的LED用于光源和光接收器。 可以使用集成电路比较器来提供用于确定光束是否被阻挡的可调阈值。

公开(公告)号：US20120113291A1

公开(公告)日：2012-05-10

申请号：US13346786

申请日：2012-01-10

Applicant: Tomohisa Kinugasa

Inventor： Tomohisa Kinugasa

IPC: H04N5/228 ,  H03F3/08

CPC classification number: G01J1/44 ,  G01J1/18 ,  H01L31/1105

Abstract: The present invention provides a photo-sensor with a stable current limiting function and pixel reset function. When the incident light quantity of the phototransistor is equal to or less than a predetermined quantity and the base potential of the phototransistor is in a first potential of an operation point in a stationary state, an MOSFET for discharging an electric charge is controlled so as to be turned OFF. In addition, when the incident light quantity of the phototransistor is equal to or more than the predetermined quantity, a MOSFET for detecting an electric current is controlled so as to operate in a saturation region. When the base potential of the phototransistor has changed to a second potential from the first potential, the MOSFET for discharging an electric charge is controlled so as to be turned ON.

Abstract translation: 本发明提供具有稳定的限流功能和像素复位功能的光传感器。 当光电晶体管的入射光量等于或小于预定量并且光电晶体管的基极电位处于静止状态的操作点的第一电位时，控制用于放电的MOSFET，以便 关闭。 此外，当光电晶体管的入射光量等于或大于预定量时，用于检测电流的MOSFET被控制为在饱和区域中操作。 当光电晶体管的基极电位从第一电位变为第二电位时，用于放电电荷的MOSFET被控制为接通。

公开(公告)号：US20110265840A1

公开(公告)日：2011-11-03

申请号：US12770743

申请日：2010-04-30

Applicant: Moshe Sela

Inventor： Moshe Sela

IPC: H01L31/042 ,  G01J1/42

CPC classification number: G01J1/18 ,  F24S40/00 ,  F24S2201/00 ,  G01J1/4204 ,  G01J2001/4266 ,  H02S50/10 ,  Y02E10/40

Abstract: A photovoltaic efficiency estimator, comprising a photovoltaic cell covered by a sunlight-penetrable surface; an illuminator for artificially illuminating said surface; and a controller connected to said photovoltaic cell and to said illuminator, said controller being configured to measure an amount of voltage produced in said photovoltaic cell as a result of the artificial illumination by said illuminator, so as to estimate a decrease in the efficiency of said photovoltaic cell caused by dirt on said surface.

Abstract translation: 一种光伏效率估计器，包括由阳光透射表面覆盖的光伏电池; 用于人造照明所述表面的照明器; 以及连接到所述光伏电池和所述照明器的控制器，所述控制器被配置为通过所述照明器的人造照明来测量在所述光伏电池中产生的电压的量，以便估计所述光电池的效率的降低 光电池由所述表面上的污垢引起。

公开(公告)号：US08039799B2

公开(公告)日：2011-10-18

申请号：US12118261

申请日：2008-05-09

Applicant: Mark C. Buckley ,  David E. Merritt

Inventor： Mark C. Buckley ,  David E. Merritt

IPC: G01J5/00

CPC classification number: G01J1/02 ,  G01J1/0228 ,  G01J1/0271 ,  G01J1/0488 ,  G01J1/18 ,  G01J1/4204 ,  G01J1/4228 ,  G01J5/0846 ,  G01J5/34 ,  G01J2005/068 ,  G08B13/1895 ,  G08B13/191

Abstract: A system and method for detecting the presence of a moving object within a detection zone is provided. The system includes a first sensor responsive to light in a first range of wavelengths in the detection zone, a second sensor responsive to light in a second range of wavelengths in the detection zone, wherein the second range of wavelengths is different from the first range of wavelengths, and a processing component for generating a variable threshold value for the first sensor based upon at least maximum and minimum output signals from the second sensor within a predetermined period of time, and for comparing the first output signal with the variable threshold value. The processing component generates an activating signal if the first output signal exceeds the threshold value.

Abstract translation: 提供了一种用于检测检测区域内的移动物体的存在的系统和方法。 该系统包括响应于检测区域中的第一波长范围内的光的第一传感器，响应于检测区域中的第二波长范围内的光的第二传感器，其中第二波长范围不同于第一范围 以及用于在预定时间段内基于来自第二传感器的至少最大和最小输出信号产生用于第一传感器的可变阈值的处理部件，以及用于将第一输出信号与可变阈值进行比较。 如果第一输出信号超过阈值，则处理部件产生激活信号。

公开(公告)号：US08003930B2

公开(公告)日：2011-08-23

申请号：US12906839

申请日：2010-10-18

Applicant: Shinichi Otsuka ,  Yuichiro Nakata ,  Junji Fujino

Inventor： Shinichi Otsuka ,  Yuichiro Nakata ,  Junji Fujino

IPC: H01J40/14

CPC classification number: H05B41/3922 ,  G01J1/18 ,  G01J1/4204 ,  G01J1/44 ,  H03F3/08

Abstract: In an ambient light sensor according to the present invention, a current amplification portion which amplifies a light current obtained by a light receiving portion to generate an output signal includes: a current amplification stage that has: a first current mirror amplifier which is composed of a bipolar transistor, and a second current mirror amplifier which is composed of a field effect transistor connected in parallel with the first current mirror amplifier; and a changeover control circuit which monitors an amplified current input into the current amplification stage, and performs changeover control of the first and second current mirror amplifiers according to a value of the amplified current.

Abstract translation: 在根据本发明的环境光传感器中，放大由光接收部分获得的光电流以产生输出信号的电流放大部分包括：电流放大级，其具有：第一电流镜放大器，其由 双极晶体管和第二电流镜放大器，其由与第一电流镜放大器并联连接的场效应晶体管组成; 以及切换控制电路，其监视输入到电流放大级的放大电流，并根据放大电流的值执行第一和第二电流镜放大器的切换控制。

公开(公告)号：US20110149274A1

公开(公告)日：2011-06-23

申请号：US12645721

申请日：2009-12-23

Applicant: Tero P. Rissa ,  Samu T. Koskinen ,  Tuomo Maki-Marttunen ,  Matti Viikinkoski

Inventor： Tero P. Rissa ,  Samu T. Koskinen ,  Tuomo Maki-Marttunen ,  Matti Viikinkoski

IPC: G01J1/44 ,  G01J1/18

CPC classification number: G01J1/46 ,  G01J1/18 ,  H04N5/3745

Abstract: An apparatus includes an array containing N sub-diffraction limit light sensors each having an associated light absorption activation threshold for switching from a reset state to an activated state, where the light absorption activation values lie within a range of values. The apparatus further includes a processor connected with a memory including computer program code, where the memory and computer program code are configured to, with the processor, cause the apparatus at least to perform estimating an intensity of light that illuminates the array based on electrical outputs of the array.

Abstract translation: 一种装置包括一个阵列，其包含N个亚衍射极限光传感器，每个子衍射极限光传感器具有相关联的光吸收激活阈值，用于从复位状态切换到激活状态，其中光吸收激活值位于值的范围内。 该设备还包括与包括计算机程序代码的存储器连接的处理器，其中存储器和计算机程序代码被配置为与处理器一起使得设备至少基于电输出来估计照亮阵列的光强度 的数组。

公开(公告)号：US20110141078A1

公开(公告)日：2011-06-16

申请号：US12884986

申请日：2010-09-17

Applicant: Jeffrey Raynor ,  Abdelouahid Zakriti ,  Stephane Vivien ,  Pascal Mellot

Inventor： Jeffrey Raynor ,  Abdelouahid Zakriti ,  Stephane Vivien ,  Pascal Mellot

IPC: G06F3/038 ,  G01J1/44 ,  G01D18/00

CPC classification number: G01J1/18 ,  G01J1/46

Abstract: Ambient light is detected by a photodiode circuit by measuring the time taken for a digital output of the photodiode circuit to change state in response to exposure of a photodiode of the photodiode circuit to that ambient light. A nominal time for state change is calculated based on photodiode circuit characteristics. Furthermore, an effective time for the photodiode circuit digital output to change state is determined in a calibration mode where the photodiode has been disconnected and a reference current is applied to the circuit. An illumination value of the detected ambient light is then calculated as a function of: the measured time, the effective time and the nominal time.

Abstract translation: 通过测量光电二极管电路的数字输出所需的时间以响应于光电二极管电路的光电二极管暴露于​​该环境光而改变状态，由光电二极管电路检测环境光。 基于光电二极管电路特性计算状态变化的标称时间。 此外，在光电二极管已经断开并且将参考电流施加到电路的校准模式中确定用于光电二极管电路数字输出改变状态的有效时间。 然后根据测量的时间，有效时间和标称时间来计算检测到的环境光的照明值。

公开(公告)号：US20100259570A1

公开(公告)日：2010-10-14

申请号：US12822511

申请日：2010-06-24

Applicant: Toshihiko Omi ,  Isamu Fujii ,  Satoshi Machida ,  Toshiyuki Uchida

Inventor： Toshihiko Omi ,  Isamu Fujii ,  Satoshi Machida ,  Toshiyuki Uchida

IPC: G09G5/10 ,  G01J1/42

CPC classification number: H01L27/14645 ,  G01J1/02 ,  G01J1/0488 ,  G01J1/18 ,  G01J1/4228 ,  G01J1/44 ,  H01L27/14621 ,  H04N5/37457

Abstract: Provided is a photodetection device which is small in size and has excellent sensitivity. A photodetection device puts cathode terminals of photodiodes having different spectral characteristics into an open end state, and detects light intensity of a desired wavelength region according to a difference in electric charges that have been stored in those photodiodes in a given period of time. The photodiodes employ a system of storing electric charges, and hence even if a photocurrent is small, the photocurrent may be stored to obtain the electric charges required for detection, and the downsizing and high detection performance of a semiconductor device that forms the photodiodes may be achieved. Further, a wide dynamic range may be realized with an electric charge storage time being variable according to the light intensity, to intermittently drive an element required for difference detection at the time of difference detection so as to suppress electric power consumption, or to average the output so as to reduce flicker.

Abstract translation: 提供了一种尺寸小且灵敏度高的光检测装置。 光检测装置将具有不同光谱特性的光电二极管的阴极端子设置为开放状态，并且根据在给定时间段内存储在那些光电二极管中的电荷的差异来检测期望波长区域的光强度。 光电二极管使用存储电荷的系统，因此即使光电流小，也可以存储光电流以获得检测所需的电荷，并且形成光电二极管的半导体器件的小型化和高检测性能可以是 实现了 此外，可以通过根据光强度可变的电荷存储时间来实现宽的动态范围，以间歇地驱动差分检测时的差分检测所需要的元件以抑制电力消耗，或者使 输出以减少闪烁。

公开(公告)号：US07683955B2

公开(公告)日：2010-03-23

申请号：US11907597

申请日：2007-10-15

Applicant: Takayuki Shimizu

Inventor： Takayuki Shimizu

IPC: H04N3/14

CPC classification number: G01J1/44 ,  G01J1/18 ,  Y10S323/907

Abstract: A photocurrent sensing circuit includes a logarithmic compression circuit; a cancellation circuit logarithmically compressing a current substantially equal in temperature coefficient of the photocurrent to convert the same into a voltage, and performing an addition or a subtraction on the converted voltage and a voltage converted from a photocurrent by logarithmically compression; a logarithmic operation circuit logarithmically compressing the voltage received from the cancellation circuit to produce a first voltage, logarithmically compressing a voltage proportional to a thermal voltage of the photocurrent to produce a second voltage, logarithmically compressing a current having thermal dependence of nearly zero to produce a third voltage and performing an addition or a subtraction of each of the second and third voltages with respect to the first voltage to produce a fourth voltage; and an inverse logarithmic transformation circuit performing inverse logarithmic transformation on the fourth voltage to output a current.

Abstract translation: 光电流检测电路包括对数压缩电路; 抵消电路对数压缩光电流温度系数基本相等的电流，将其转换为电压，并对转换后的电压进行加法或减法，以及通过对数压缩从光电流转换的电压; 对数运算电路对数压缩从消除电路接收的电压以产生第一电压，对数压缩与光电流的热电压成比例的电压，以产生第二电压，对数压缩具有几乎为零的热依赖性的电流，以产生 并且相对于所述第一电压执行所述第二和第三电压中的每一个的相加或减法以产生第四电压; 以及逆对数变换电路，对第四电压进行逆对数变换以输出电流。

公开(公告)号：US20100037373A1

公开(公告)日：2010-02-18

申请号：US12593816

申请日：2007-10-18

Applicant: Stephen L. Macknik

Inventor： Stephen L. Macknik

IPC: A61F9/02 ,  H04N5/00 ,  G08B17/12

CPC classification number: G01J1/32 ,  G01J1/04 ,  G01J1/044 ,  G01J1/0488 ,  G01J1/18 ,  G01J1/4228 ,  G01J2001/0276 ,  G01J2001/4247 ,  H05B37/02 ,  H05B41/36 ,  H05B41/3922

Abstract: A method and apparatus are provided for processing light from a light source. The method includes the steps of measuring a predetermined set of characteristics of the light source and detecting flicker when the predetermined set of characteristics exceed a corresponding flicker fusion threshold value.

Abstract translation: 提供了一种用于处理来自光源的光的方法和装置。 该方法包括以下步骤：当预定的特征集合超过相应的闪烁融合阈值时，测量光源的一组预定特性并检测闪烁。