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    • 3. 发明授权
    • Monolithic light-to-digital signal converter
    • 单片光数字信号转换器
    • US5850195A
    • 1998-12-15
    • US625611
    • 1996-03-29
    • John H. Berlien, Jr.Cecil J. AswellEugene G. DierschkeMehedi Hassan
    • John H. Berlien, Jr.Cecil J. AswellEugene G. DierschkeMehedi Hassan
    • H03M1/12H03M1/00G08C19/04
    • H03M1/129G01J1/46H03M1/60
    • A monolithic light-to-digital signal converter (1.10) includes a photodiode array (1.24) having a plurality of sections with each section producing a current signal in response to incident light, a current-to-digital signal converter circuit (1.28) for converting selected ones of the current signals to a digital signal, and a control circuit (1.26) for scaling the digital signal in response to user supplied programming signals. The control circuit (1.26) also responds to user supplied programming signals to supply control signals to current-to-digital signal converter circuit (1.28). Current-to-digital signal converter circuit (1.28) is responsive to the control signals for combining selected ones of the current signals into a composite current signal and converting the composite current signal to a digital signal.
    • 单片光数字信号转换器(1.10)包括具有多个部分的光电二极管阵列(1.24),每个部分响应于入射光而产生电流信号;电流 - 数字信号转换器电路(1.28),用于 将所选择的当前信号转换为数字信号,以及用于响应于用户提供的编程信号对数字信号进行缩放的控制电路(1.26)。 控制电路(1.26)还响应用户提供的编程信号,将控制信号提供给电流 - 数字信号转换器电路(1.28)。 电流 - 数字信号转换器电路(1.28)响应于用于将选定电流信号组合成复合电流信号的控制信号,并将复合电流信号转换为数字信号。
    • 4. 发明授权
    • Method of making position sensing photosensor device
    • 制造位置传感光电传感器的方法
    • US5547879A
    • 1996-08-20
    • US554878
    • 1995-11-07
    • Eugene G. DierschkeJohn H. Berlien, Jr.
    • Eugene G. DierschkeJohn H. Berlien, Jr.
    • H01L27/144H01L31/02H01L31/18
    • H01L27/1443H01L31/02024
    • A photosensor device (41) having tapered photodiodes (53, 55) that are interdigitated and which is compatible with typical ASIC, CMOS and BiCMOS processes. A left side photodiode array of tapered regions (53) of a first conductivity type is disposed into an epitaxil layer of a second conductivity type. This array of photodiodes is coupled together and further coupled to a first output terminal (43). A right side photodiode array of tapered regions (55) of said first conductivity type is disposed into the epitaxial layer of the second conductivity type, spaced apart from the left side photodiode by a minimum distance. A second output terminal is coupled to the array of right side photodiodes (51). An incident light spot (39) is focused onto the sensor. The amount of current generated at the first and second output terminals (43, 51) will be proportional to the area of the left photodiode array and the area of the right photodiode array which is receiving light. By comparing the current generated at the first and second output terminals, the position of the incident light spot can be accurately measured as a percentage of the total width of the sensor. The photosensor (41) may be used in many applications but is particularly well suited to autofocusing systems. Several embodiments are described which vary the size and number of photodiodes used. An integrated circuit (123) which incorporates the photosensor with the circuitry needed to output a digital position measurement is described.
    • 具有交错指示并且与典型的ASIC,CMOS和BiCMOS工艺兼容的锥形光电二极管(53,55)的光电传感器装置(41)。 将第一导电类型的锥形区域(53)的左侧光电二极管阵列设置在第二导电类型的外延层中。 这个光电二极管阵列耦合在一起并进一步耦合到第一输出端(43)。 所述第一导电类型的锥形区域(55)的右侧光电二极管阵列被布置在与左侧光电二极管间隔开最小距离的第二导电类型的外延层中。 第二输出端子耦合到右侧光电二极管阵列51。 入射光点(39)聚焦在传感器上。 在第一和第二输出端子(43,41)处产生的电流量将与左光电二极管阵列的面积和正在接收光的右光电二极管阵列的面积成比例。 通过比较在第一和第二输出端产生的电流,入射光点的位置可以精确地测量为传感器的总宽度的百分比。 光传感器(41)可以用于许多应用中,但是特别适合于自动对焦系统。 描述了改变所使用的光电二极管的尺寸和数量的几个实施例。 描述了将光传感器与输出数字位置测量所需的电路结合的集成电路(123)。
    • 5. 发明授权
    • Defective pixel filtering for digital imagers
    • 数字成像器的缺陷像素滤波
    • US07286179B2
    • 2007-10-23
    • US10798211
    • 2004-03-10
    • Zhiliang Julian ChenEugene G. DierschkeSteven Derek ClynesAnli Liu
    • Zhiliang Julian ChenEugene G. DierschkeSteven Derek ClynesAnli Liu
    • H04N9/64
    • H04N5/3675H04N5/16H04N5/20H04N5/243
    • Defective pixels in a CMOS array give rise to spot noise that diminishes the integrity of the resulting image. Because CMOS arrays and digital logic can be fabricated on the same integrated circuit using the same processing technology and relatively inexpensive and fast circuit can be employed to digitally filter the pixel data stream and to identify pixels having values that do not fall in the range defined by the immediately neighboring pixels and the deviate from the neighboring pixels by more than a threshold amount. Such conditions would indicate that the deviation is caused by a defective pixel rather than by desired image data. The threshold amount can be preprogrammed or can be provided by a user or can be dynamically set using feedback indicating image quality. The filter would also provide a solution for other sensors such as CCD, although a single chip solution would likely not be possible.
    • CMOS阵列中的不良像素会产生斑点噪声,从而降低所得图像的完整性。 由于可以使用相同的处理技术在相同的集成电路上制造CMOS阵列和数字逻辑,并且可以使用相对便宜且快速的电路来对像素数据流进行数字滤波,并且识别具有不在下面限定的范围内的值的像素 紧邻相邻像素并且偏离相邻像素超过阈值量。 这样的条件将指示偏差是由缺陷像素而不是期望的图像数据引起的。 阈值可以是预编程的,也可以由用户提供,也可以使用表示图像质量的反馈进行动态设定。 该滤波器还将为其他传感器(如CCD)提供解决方案,尽管单芯片解决方案可能无法实现。