公开(公告)号：US09163996B2

公开(公告)日：2015-10-20

申请号：US14298920

申请日：2014-06-08

Applicant: University of Electronic Science and Technology of China

Inventor： Jian Lv ,  Longcheng Que ,  Yun Zhou ,  Linhai Wei ,  Yadong Jiang

IPC: G01J5/00 ,  G01J5/10 ,  G01J5/22 ,  G01J5/20

CPC classification number: G01J5/10 ,  G01J5/20 ,  G01J5/22 ,  G01J2005/106 ,  H04N5/33 ,  H04N5/3651

Abstract: A readout circuit for an uncooled infrared focal plane array includes: a first biasing circuit for generating a detection output signal; a second biasing circuit for generating a first reference output signal; a first integration circuit; and an analog-to-digital circuit including: a ramp signal generating circuit for generating a ramp signal according to a second reference microbolometer of a third biasing circuit. In the readout circuit, subtracting and amplifying the detection output signal and the first reference output signal are provided by the integrator at an analog domain, while ratio counting is provided by an analog-to-digital converter during analog-to-digital conversion. Furthermore, a column level integrated readout channel utilizes only one reference microbolometer, and the chip level ramp signal generator also utilizes only one reference microbolometer. Therefore, a chip area is further saved, and noise sources are decreased.

公开(公告)号：US11828655B2

公开(公告)日：2023-11-28

申请号：US17345331

申请日：2021-06-11

Applicant: University of Electronic Science and Technology of China

Inventor： Yun Zhou ,  Jian Lv ,  Longcheng Que ,  Kang He ,  Guanyu Mi

IPC: G01J5/00 ,  G06T7/80 ,  G06T7/90 ,  G06T7/00 ,  G01J5/80

CPC classification number: G01J5/00 ,  G06T7/0002 ,  G06T7/80 ,  G06T7/90 ,  G01J5/80 ,  G06T2207/10048 ,  G06T2207/30168

Abstract: A method and system of two-point correction based on temperature substitution, includes: a black body related to the lens temperature is arranged outside a lens, a first black body arranged in front of the lens of an infrared thermal camera, so as to collect a gray value of the first black body; a temperature of the first black body being equal to the lens temperature; a second black body arranged in front of the lens of the infrared thermal camera, so as to collect a gray value of the second black body; a temperature of the second black body being higher than the lens temperature. Two correction parameters obtained by black body calculation related to temperature are strongly applicable, which eliminates the problem of image quality deterioration caused by temperature changes and greatly eliminates the pot lid phenomenon due to non-uniformity, thereby accurately calculating the corrected gray value.

公开(公告)号：US10996107B2

公开(公告)日：2021-05-04

申请号：US16577127

申请日：2019-09-20

Applicant: University of Electronic Science and Technology of China

Inventor： Longcheng Que ,  Daogang Min ,  Kai Yang ,  Yi Zhang ,  Jian Lv ,  Yun Zhou ,  Yadong Jiang

IPC: G01J1/44 ,  G01J5/28 ,  H01L31/024 ,  H04N5/33

Abstract: The present disclosure relates to an exponential model based uncooled infrared focal plane array readout circuit, including: a first microbolometer unit and a second microbolometer unit, for obtaining a detection signal and a reference signal; a conversion unit, connected with the first and second microbolometer units, and configured for converting the detection signal and reference signal to obtain a linear detection signal and linear reference signal; a subtraction unit, connected with the conversion unit, and configured for calculating a difference between the detection signal and the reference ratio signal to obtain a difference signal; and an integration unit, connected to the subtraction unit, and configured for integrating the difference signal to obtain an electrical signal for characterizing the infrared light signal of the to-be-detected object.

公开(公告)号：US10036669B1

公开(公告)日：2018-07-31

申请号：US15712287

申请日：2017-09-22

Applicant: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA

Inventor： Jian Lv ,  Longcheng Que ,  Jinyu Qin ,  Yue Wan ,  Qiming Wang ,  Yadong Jiang

IPC: G01J5/00 ,  G01J5/22 ,  H03M1/12 ,  H03K17/687

CPC classification number: G01J5/22 ,  G01J1/46 ,  H03K17/6871 ,  H03M1/12 ,  H03M1/50 ,  H04N5/33 ,  H04N5/378

Abstract: An infrared focal plane readout integrated circuit that includes a unit bias circuit, an integrating circuit, and an on-chip analog-to-digital conversion circuit, where the integrating circuit includes a first switch tube, a second switch tube, and an integrating capacitor; an output end of the unit bias circuit is connected to an input end of the first switch tube; an input end of the second switch tube is connected to a set terminal; both an output end of the first switch tube and an output end of the second switch tube are connected to one end of an integrating capacitor and an input end of the on-chip analog-to-digital conversion circuit; the other end of the integrating capacitor is grounded; and the on-chip analog-to-digital conversion circuit includes a first inverter, a second inverter, a third inverter, an exclusive-OR gate, a built-in sequence counter, and a register.

公开(公告)号：US20210048340A1

公开(公告)日：2021-02-18

申请号：US16577127

申请日：2019-09-20

Applicant: University of Electronic Science and Technology of China

Inventor： Longcheng Que ,  Daogang Min ,  Kai Yang ,  Yi Zhang ,  Jian Lv ,  Yun Zhou ,  Yadong Jiang

IPC: G01J1/44 ,  H04N5/33 ,  H01L31/024 ,  G01J5/28

Abstract: The present disclosure relates to an exponential model based uncooled infrared focal plane array readout circuit, including: a first microbolometer unit and a second microbolometer unit, for obtaining a detection signal and a reference signal; a conversion unit, connected with the first and second microbolometer units, and configured for converting the detection signal and reference signal to obtain a linear detection signal and linear reference signal; a subtraction unit, connected with the conversion unit, and configured for calculating a difference between the detection signal and the reference ratio signal to obtain a difference signal; and an integration unit, connected to the subtraction unit, and configured for integrating the difference signal to obtain an electrical signal for characterizing the infrared light signal of the to-be-detected object.

公开(公告)号：US20150192472A1

公开(公告)日：2015-07-09

申请号：US14298920

申请日：2014-06-08

Applicant: University of Electronic Science and Technology of China

Inventor： Jian Lv ,  Longcheng Que ,  Yun Zhou ,  Linhai Wei ,  Yadong Jiang

IPC: G01J5/10

CPC classification number: G01J5/10 ,  G01J5/20 ,  G01J5/22 ,  G01J2005/106 ,  H04N5/33 ,  H04N5/3651

Abstract: A readout circuit for an uncooled infrared focal plane array includes: a first biasing circuit for generating a detection output signal; a second biasing circuit for generating a first reference output signal; a first integration circuit; and an analog-to-digital circuit including: a ramp signal generating circuit for generating a ramp signal according to a second reference microbolometer of a third biasing circuit. In the readout circuit, subtracting and amplifying the detection output signal and the first reference output signal are provided by the integrator at an analog domain, while ratio counting is provided by an analog-to-digital converter during analog-to-digital conversion. Furthermore, a column level integrated readout channel utilizes only one reference microbolometer, and the chip level ramp signal generator also utilizes only one reference microbolometer. Therefore, a chip area is further saved, and noise sources are decreased.

Abstract translation: 用于非制冷红外焦平面阵列的读出电路包括：用于产生检测输出信号的第一偏置电路; 用于产生第一参考输出信号的第二偏置电路; 第一个集成电路; 以及模数电路，包括：斜坡信号发生电路，用于根据第三偏置电路的第二参考微量热计生成斜坡信号。 在读出电路中，减法和放大检测输出信号和第一参考输出信号由积分器以模拟域提供，而在模数转换期间由模数转换器提供比率计数。 此外，列级综合读出通道仅使用一个参考微量热计，芯片级斜坡信号发生器也仅使用一个参考微量热计。 因此，进一步节省了芯片面积，降低了噪声源。