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公开(公告)号：US11635498B2
公开(公告)日：2023-04-25
申请号：US16862792
申请日：2020-04-30
Applicant: STMicroelectronics (Grenoble 2) SAS)
Inventor： Pascal Mellot
IPC: G01S7/4914 , G01S17/36 , H01L31/107 , G01S7/4865
Abstract: A time-of-flight ranging system includes an array of single photon avalanche diode (SPAD) pixels, and control circuitry that causes the array of SPAD pixels to integrate SPAD event data received from each SPAD pixel of a first cluster of SPAD pixels during a first illumination of a target, the first cluster of SPAD pixels being a subset of the array of SPAD pixels, and integrate SPAD event data received from each SPAD pixel of a second cluster of SPAD pixels during a second illumination of the target, the second cluster of SPAD pixels being a subset of the array of SPAD pixels. At a start of integration of the SPAD event data received from each SPAD pixel of the second cluster of SPAD pixels, the integrated SPAD event data that was received from each SPAD of the first cluster of SPAD pixels is accumulated.
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公开(公告)号：US11500095B2
公开(公告)日：2022-11-15
申请号：US16289016
申请日：2019-02-28
Applicant: STMicroelectronics (Grenoble 2) SAS
Inventor： Pascal Mellot
IPC: G01S17/36 , G01S7/4915 , G01S7/481 , H01L31/107 , G06F17/12 , G01S17/10 , G01S17/931
Abstract: A method, for determining the real distance separating an object and an optical detection system, includes, from several so-called reported distances respectively less than or equal to individual reference distances dependent respectively on modulation frequencies: in a first step, determining an initial deviation coefficient between the reported distances and incrementing the smallest of the reported distances with the corresponding individual reference distance; then in a second step, determining a current deviation coefficient between the current distances obtained in the preceding step and incrementing the smallest of the current distances with the corresponding individual reference distance; and in a third step, repeating the second step until all the current distances exceed a common reference distance greater than the individual reference distances.
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公开(公告)号：US11209310B2
公开(公告)日：2021-12-28
申请号：US17006436
申请日：2020-08-28
Applicant: STMicroelectronics (Grenoble 2) SAS
Inventor： Pascal Mellot , Laurent Plaza , Jeannie Chinal
Abstract: The present disclosure relates to a depth map sensor including a light source for transmitting light pulses into an image scene; an array of pixel circuits, where each pixel circuit has a photodetector and three asynchronous counters; and a control circuit to control each of a plurality of groups of the pixel circuits of the array to generate a histogram of detection events by accumulating events during eight distinct time intervals between consecutive light pulses transmitted by the light source, such that the histogram comprises eight or more histogram bins.
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54.发明授权公开(公告)号：US10712198B2
公开(公告)日：2020-07-14
申请号：US16110779
申请日：2018-08-23
Applicant: STMicroelectronics (Grenoble 2) SAS
Inventor： Pascal Mellot
Abstract: In an embodiment, a method for measuring an average frequency of an AC signal includes receiving the AC signal, triggering a first counter that is clocked at a first frequency, detecting each zero crossing of the AC signal in a predetermined crossing direction, recording a value of the first counter at each detected zero crossing, incrementing a second counter at each detected zero crossing, and calculating the average frequency of the AC signal based on the first frequency, a last recorded value of the first counter, and a last value of the second counter.
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公开(公告)号：US10416294B2
公开(公告)日：2019-09-17
申请号：US15169464
申请日：2016-05-31
Applicant: STMicroelectronics (Research & Development) Limited , STMicroelectronics (Grenoble 2) SAS
Inventor： Pascal Mellot , Stuart McLeod , Marc Drader
Abstract: A ranging device includes an array of photon detection devices that receive an optical signal reflected by an object in an image scene and first and second logic devices to respectively combine the outputs of first and second pluralities of the photon detection devices. First and second counter circuits are respectively coupled an output of the first and second logic devices and generate first and second count values respectively by counting the photon detection events generated by the first and second pluralities of photon detection devices. A range estimation circuit estimates the range of the object by estimating the timing of one or more pulses of said optical signal based on the first and second count values.
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Patent Agency Ranking
56.发明申请公开(公告)号：US20190170573A1
公开(公告)日：2019-06-06
申请号：US16110779
申请日：2018-08-23
Applicant: STMicroelectronics (Grenoble 2) SAS
Inventor： Pascal Mellot
CPC classification number: G01J1/44 , G01J1/4204 , G01R23/10
Abstract: In an embodiment, a method for measuring an average frequency of an AC signal includes receiving the AC signal, triggering a first counter that is clocked at a first frequency, detecting each zero crossing of the AC signal in a predetermined crossing direction, recording a value of the first counter at each detected zero crossing, incrementing a second counter at each detected zero crossing, and calculating the average frequency of the AC signal based on the first frequency, a last recorded value of the first counter, and a last value of the second counter.
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公开(公告)号：US10094915B2
公开(公告)日：2018-10-09
申请号：US14927717
申请日：2015-10-30
Applicant: STMICROELECTRONICS (GRENOBLE 2) SAS
Inventor： Marc Drader , Pascal Mellot
Abstract: A method is for estimating a distance to an object. The method may include determining, by a ranging device, a first range value based upon a time of flight of first optical pulses having a period of a first duration, and determining, by the ranging device, a second range value based upon a time of flight of second optical pulses having a period of a second duration different from the first duration. The method may include estimating the distance based upon the first and second range values.
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58.发明申请公开(公告)号：US20180217241A1
公开(公告)日：2018-08-02
申请号：US15938435
申请日：2018-03-28
Applicant: STMicroelectronics (Grenoble 2) SAS
Inventor： Pascal Mellot
CPC classification number: G01S7/4865 , G01S7/487 , G01S17/026 , G01S17/10
Abstract: A method includes preparing a first histogram from the emission of initial optical radiation and including at least one processing iteration performed at a rate of a clock signal having an internal period equal to a sub-multiple of the optical period a sensor signal and a reference signal. Successive iterations of histogram preparation are performed so that in each iteration a time shift of the initial optical radiation is provided by a first fraction of the internal period until at least one portion of the internal period is covered to obtain an additional histogram at the conclusion of each iteration. A numerical combination of the first histogram and additional histograms is performed to obtain a final histogram having a finer time granularity than that of the first histogram.
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公开(公告)号：US09200951B2
公开(公告)日：2015-12-01
申请号：US14107844
申请日：2013-12-16
Applicant: STMicroelectronics (Grenoble 2) SAS
Inventor： Pascal Mellot
CPC classification number: G01J1/4204 , H04N5/23245 , H04N5/2351 , H04N5/345
Abstract: A device includes an image sensor and a circuit for controlling the sensor. The control circuit is configured control the device in a first operating mode and second operating mode. In the first operating mode images acquired by the sensor are output. In the second operating mode, no images are provided, but a selected subassembly of pixels of the image sensor are read and image data therefrom is processed to provide an ambient luminosity value.
Abstract translation: 一种装置包括图像传感器和用于控制传感器的电路。 控制电路被配置为在第一操作模式和第二操作模式下控制设备。 在第一操作模式中，输出由传感器获取的图像。 在第二操作模式中，不提供图像，而是读取图像传感器的所选择的像素组件，并处理其图像数据以提供环境光度值。
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公开(公告)号：US20150268094A1
公开(公告)日：2015-09-24
申请号：US14727918
申请日：2015-06-02
Applicant: STMicroelectronics (Grenoble 2) SAS
Inventor： Pascal Mellot
CPC classification number: G01J1/4204 , G01J1/18 , G01J1/42 , G01J1/44 , G01J2001/4426 , H04N1/00917
Abstract: The following steps are performed in connection with a photodiode circuit: a) resetting the photodiode circuit; b) determining when a photodiode voltage changes in response to illumination to reach a threshold; and c) updating a counter in response to the determination in step b). The steps a) to c) are repeated until an end of a measurement period is reached. The value of the counter at the end of the measurement period is then output to indicate an intensity of the illumination.
Abstract translation: 结合光电二极管电路执行以下步骤：a）复位光电二极管电路; b）确定光电二极管电压何时响应于照明而改变以达到阈值; 以及c）响应于步骤b）中的确定来更新计数器。 重复步骤a）至c），直到达到测量周期的结束。 然后输出测量周期结束时计数器的值以指示照明的强度。
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