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公开(公告)号：US10542184B2
公开(公告)日：2020-01-21
申请号：US15878467
申请日：2018-01-24
摘要： A photoelectric conversion device includes a photoelectric conversion element to generate an image signal according to an intensity of light being input and circuitry. The circuitry obtains pixel values in dark time, respectively, for at least a first time and a second time. The second time is longer than the first time. The pixel values in dark time represent pixel values obtained when no light is input to the photoelectric conversion element. The circuitry obtains a subtraction between the pixel values for the first time and the pixel values for the second time. The circuitry detects a noise amount based on the subtraction. The circuitry determines at least one pixel having the detected noise amount that is equal to or greater than a predetermined first threshold value, as a defective pixel of the photoelectric conversion element.
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公开(公告)号：US11457121B2
公开(公告)日：2022-09-27
申请号：US17487278
申请日：2021-09-28
摘要： A reading device includes a first light source configured to emit light, a second light source configured to emit light in a wavelength of light different from a wavelength of light of the first light source, circuitry configured to instruct the first light source and the second light source to turn on and turn off, a first light-intensity adjuster configured to adjust light intensity of the first light source based on a first light intensity value, a second light-intensity adjuster configured to adjust light intensity of the second light source based on a second light intensity value, a first image sensor configured to receive the light that is emitted from the first light source and is reflected by an object, and a second image sensor configured to receive the light that is emitted from the first light source and the second light source and is reflected by the object.
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公开(公告)号：US10182177B2
公开(公告)日：2019-01-15
申请号：US15485323
申请日：2017-04-12
摘要： A signal processing device includes a signal output circuit, a controller, and a corrector. The signal output circuit outputs a signal according to a physical quantity being input. The controller controls the signal output circuit. The corrector corrects a signal to be corrected. The signal to be corrected is output from the signal output circuit. The signal output circuit selectively performs one of first operation of outputting a characteristic signal that indicates characteristics of the signal output circuit and second operation of outputting a pseudo signal that is generated spuriously, according to control of the controller. The corrector corrects the signal to be corrected based on one of the characteristic signal and the pseudo signal output from the signal output circuit.
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公开(公告)号：US10536655B2
公开(公告)日：2020-01-14
申请号：US15790101
申请日：2017-10-23
摘要： A photoelectric conversion device having plural photoelectric conversion pixels includes an imaging unit, a position identifying unit, an interpolation determining unit, and an interpolation processing unit. The imaging unit generates image data for each of plural colors based on light received in the photoelectric conversion pixels. The position identifying unit detects in the photoelectric conversion pixels a defective pixel outputting an electrical signal at an abnormal level, and stores position information of the defective pixel. The interpolation deter mining unit determines, based on respective pixel values of peripheral pixels peripheral to the defective pixel, whether to perform an interpolation process on the defective pixel. The interpolation processing unit performs the interpolation process on the defective pixel when the interpolation determining unit determines to perform the interpolation process on the defective pixel. The interpolation process approximates the electrical signal of the defective pixel to an electrical signal at a normal level.
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5.发明授权公开(公告)号：US10475844B2
公开(公告)日：2019-11-12
申请号：US15831509
申请日：2017-12-05
申请人： Keita Inoue , Masamoto Nakazawa , Hiroki Shirado
发明人： Keita Inoue , Masamoto Nakazawa , Hiroki Shirado
IPC分类号： H04N1/40 , H01L27/146 , H04N1/12 , H04N1/19
摘要： A photoelectric conversion device includes a generation circuit and a controller. The generation circuit generates an image signal according to an intensity of light being input. The controller controls the generation circuit to generate a dark-time image signal equivalent to an image signal generated by the generation circuit without exposure to external light.
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6.发明申请公开(公告)号：US20180213124A1
公开(公告)日：2018-07-26
申请号：US15878467
申请日：2018-01-24
CPC分类号： H04N1/58 , H04N1/401 , H04N1/4076 , H04N5/361 , H04N5/367 , H04N5/3694 , H04N2201/0081 , H04N2201/0094
摘要： A photoelectric conversion device includes a photoelectric conversion element to generate an image signal according to an intensity of light being input and circuitry. The circuitry obtains pixel values in dark time, respectively, for at least a first time and a second time. The second time is longer than the first time. The pixel values in dark time represent pixel values obtained when no light is input to the photoelectric conversion element. The circuitry obtains a subtraction between the pixel values for the first time and the pixel values for the second time. The circuitry detects a noise amount based on the subtraction. The circuitry determines at least one pixel having the detected noise amount that is equal to or greater than a predetermined first threshold value, as a defective pixel of the photoelectric conversion element.
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7.发明申请公开(公告)号：US20180175096A1
公开(公告)日：2018-06-21
申请号：US15831509
申请日：2017-12-05
申请人： Keita Inoue , Masamoto Nakazawa , Hiroki Shirado
发明人： Keita Inoue , Masamoto Nakazawa , Hiroki Shirado
IPC分类号： H01L27/146 , H04N1/12 , H04N1/40
CPC分类号： H01L27/14643 , H04N1/126 , H04N1/1906 , H04N1/40056
摘要： A photoelectric conversion device includes a generation circuit and a controller. The generation circuit generates an image signal according to an intensity of light being input. The controller controls the generation circuit to generate a dark-time image signal equivalent to an image signal generated by the generation circuit without exposure to external light.
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公开(公告)号：US11095788B2
公开(公告)日：2021-08-17
申请号：US16589329
申请日：2019-10-01
申请人： Tadaaki Oyama , Masamoto Nakazawa , Hiroki Shirado , Tomohiro Sasa , Tatsuya Ozaki , Kohsuke Nambara
发明人： Tadaaki Oyama , Masamoto Nakazawa , Hiroki Shirado , Tomohiro Sasa , Tatsuya Ozaki , Kohsuke Nambara
摘要： A document size detection device includes: a light source that irradiates a document placed on placing means with scanning light via the placing means; a reading unit that receives reflection light from the document via the placing means to acquire image data of the document; and circuitry to set an illumination depth of the scanning light at a size detection time when the size is detected, shallower than an illumination depth of the scanning light at an image reading time when an image of the document is read, and detects, at the size detection time, the size based on a difference between first image data acquired in a state in which the scanning light is switched off and second image data acquired in a state in which the scanning light is switched on.
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公开(公告)号：US11089177B2
公开(公告)日：2021-08-10
申请号：US16589258
申请日：2019-10-01
申请人： Tatsuya Ozaki , Tadaaki Oyama , Tomohiro Sasa , Hiroki Shirado , Kohsuke Nambara , Masamoto Nakazawa
发明人： Tatsuya Ozaki , Tadaaki Oyama , Tomohiro Sasa , Hiroki Shirado , Kohsuke Nambara , Masamoto Nakazawa
摘要： A reading device includes: a light source that irradiates a subject with scanning light; a light receiving section that receives reflection light from the subject; and circuitry to: control the light source to switch on and off of the scanning light; control the light receiver to receive the reflection light from the subject for a predetermined acquisition time at a predetermined acquisition interval so as to acquire data; and calculate a difference between the data acquired while the scanning light is switched on and the data acquired while the scanning light is switched off. The predetermined acquisition time and the predetermined acquisition interval are set such that the acquisition time or a total time of the acquisition time and the acquisition interval become an integer multiple of a fluctuation cycle of a fluctuation factor.
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公开(公告)号：US09973659B2
公开(公告)日：2018-05-15
申请号：US15191035
申请日：2016-06-23
申请人： Yoshio Konno , Masamoto Nakazawa , Hiroki Shirado
发明人： Yoshio Konno , Masamoto Nakazawa , Hiroki Shirado
IPC分类号： H04N1/04 , H04N1/40 , H04N1/58 , H04N1/028 , H04N5/363 , H04N5/378 , H04N5/361 , H04N5/369 , H04N1/401
CPC分类号： H04N1/58 , H04N1/02805 , H04N1/401 , H04N5/361 , H04N5/363 , H04N5/3692 , H04N5/378 , H04N2201/0081 , H04N2201/0094
摘要： An imaging element includes: a plurality of pixel units configured to each include a plurality of light receiving elements performing photoelectric conversion; a plurality of analog-to-digital (A/D) converters configured to be provided to each of the pixel units for sequentially converting an analog signal obtained by photoelectric conversion performed by the light receiving elements to a digital signal; a plurality of first holding units configured to be provided to each of the pixel units for sequentially holding a digital signal obtained by conversion performed by the A/D converters; and a plurality of second holding units configured to receive and hold a digital signal held by the first holding units in a period when the A/D converters do not convert an analog signal to a digital signal.
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