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    • 83. 发明授权
    • Front-end signal processing circuit and imaging device
    • 前端信号处理电路及成像装置
    • US07652690B2
    • 2010-01-26
    • US11723117
    • 2007-03-16
    • Naohisa HataniMitsuhiko OtaniKouji Yamaguchi
    • Naohisa HataniMitsuhiko OtaniKouji Yamaguchi
    • H04N5/228
    • H04N5/361H04N5/3575H04N5/3655
    • A front-end signal processing circuit that stabilizes a black level of an output signal of an image sensor in a prescribed set level, without being influenced by a DC offset component of circuit elements making up a feedback loop, and an imaging device including such the front-end signal processing circuit, are provided.The front-end signal processing circuit includes a feedback loop made up of a luminance detecting/digitizing section and a black level clamp section, and clamps a black level of an output signal of an image sensor to a prescribed set level. The front-end signal processing circuit further includes an offset correction section. The offset correction section stores an offset value being a difference between a signal level of an OB region of the image sensor and the prescribed level, subtracts the offset value from a digital luminance signal corresponding to an effective pixel region of the image sensor, and outputs the obtained signal.
    • 一种前端信号处理电路,其在规定的设定电平下稳定图像传感器的输出信号的黑电平,而不受构成反馈回路的电路元件的DC偏移分量的影响;以及成像装置, 前端信号处理电路。 前端信号处理电路包括由亮度检测/数字化部分和黑电平钳位部分构成的反馈回路,并将图像传感器的输出信号的黑电平钳位到规定的设定电平。 前端信号处理电路还包括偏移校正部分。 偏移校正部存储作为图像传感器的OB区域的信号电平与规定电平之间的差的偏移值,从与图像传感器的有效像素区域对应的数字亮度信号中减去偏移值,并输出 获得的信号。
    • 84. 发明申请
    • IR CAMERA AND METHOD FOR USE WITH IR CAMERA
    • 红外摄像机和使用红外摄像机的方法
    • US20090273675A1
    • 2009-11-05
    • US12114865
    • 2008-05-05
    • Henrik Jonsson
    • Henrik Jonsson
    • H04N5/33
    • H04N5/33H04N5/3655H04N17/002
    • An infrared camera is arranged to compensate for temperature variations of the camera byRecording the output signal of each pixel of the detector during a shutter operation Using the recorded signal from each pixel to update a temperature offset map stored in the camera to ensure uniform signal levels at different camera temperatures, Said code means being arranged to perform the following steps during operation of the camera: save at least a first temperature offset map during a first shutter operation at a first temperature and a second temperature offset map during a second shutter operation at a second temperature fit the data from the at least first and second offset maps to a curve using the curve to compensate for variations in signal output caused by temperature variations.
    • 红外摄像机被设置为通过在快门操作期间记录检测器的每个像素的输出信号来补偿摄像机的温度变化使用来自每个像素的记录信号来更新存储在照相机中的温度偏移映射,以确保均匀的信号电平 所述代码装置被布置为在相机操作期间执行以下步骤:在第二快门操作期间在第一温度和第二温度偏移映射的第一快门操作期间保存至少第一温度偏移映射 第二温度将来自至少第一和第二偏移映射的数据与使用该曲线的曲线拟合以补偿由温度变化引起的信号输出的变化。
    • 87. 再颁专利
    • Infrared imaging system employing on-focal plane nonuniformity correction
    • 红外成像系统采用焦平面不均匀校正
    • USRE40249E1
    • 2008-04-22
    • US09667826
    • 2000-09-21
    • Robert F. CannataJeffrey L. Metschuleit
    • Robert F. CannataJeffrey L. Metschuleit
    • G01J5/20G01J5/24
    • G01J5/22H04N5/33H04N5/3651H04N5/3655H04N5/374
    • An infrared imaging system having a focal plane array including an array of detector elements and a readout circuit and including nonuniformity correction circuitry on the focal plane array. The individual detector elements correspond to pixels of an infrared scene to be imaged. Offsets in detection signals from each pixel arising from nonuniformities in the individual detector elements in the array are corrected by storing offset correction values for each detector element and using the stored offset values to control correction circuitry as the respective detector element signals are read out. The detector array and readout circuit are preferably formed as a monolithic or hybrid structure and the offset correction is provided on the focal plane array prior to signal amplification and analog to digital conversion.
    • 一种具有焦平面阵列的红外成像系统,包括检测器元件阵列和读出电路,并且在焦平面阵列上包括非均匀性校正电路。 各个检测器元件对应于要成像的红外场景的像素。 通过存储每个检测器元件的偏移校正值并使用所存储的偏移值来对各个检测器元件信号进行读出来控制校正电路来校正来自阵列中各个检测器元件中的不均匀性的来自每个像素的检测信号的偏移。 检测器阵列和读出电路优选地形成为单片或混合结构,并且在信号放大和模数转换之前在焦平面阵列上提供偏移校正。