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1. 发明授权

US10182177B2 Signal processing device, image scanning device, image forming apparatus, and method of controlling the same 有权
公开(公告)号：US10182177B2
公开(公告)日：2019-01-15
申请号：US15485323
申请日：2017-04-12
申请人： Tomohiro Sasa , Masamoto Nakazawa , Hiroki Shirado , Hideki Hashimoto
发明人： Tomohiro Sasa , Masamoto Nakazawa , Hiroki Shirado , Hideki Hashimoto
IPC分类号： H04N1/409 , H04N1/00 , H04N1/193 , H04N1/40
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.

2. 发明授权

US11095788B2 Document size detection device, image reading device, image forming apparatus, document size detecting method, and recording medium 有权
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
IPC分类号： H04N1/00 , H04N1/028
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.

3. 发明授权

US11089177B2 Reading device, image forming apparatus, and image reading method 有权
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
IPC分类号： H04N1/04 , H04N1/028 , H04N1/00
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.

4. 发明授权

US10855866B2 Document size detection device, image reading device, image forming apparatus, and document size detecting method 有权
公开(公告)号：US10855866B2
公开(公告)日：2020-12-01
申请号：US16575457
申请日：2019-09-19
申请人： Tomohiro Sasa , Hiroki Shirado , Tadaaki Oyama , Tatsuya Ozaki , Kohsuke Nambara
发明人： Tomohiro Sasa , Hiroki Shirado , Tadaaki Oyama , Tatsuya Ozaki , Kohsuke Nambara
IPC分类号： H04N1/00
摘要： A document size detection device includes: a light source to irradiate a document with light; an imaging device to receive light reflected at the document; and circuitry to control switch on and off of the light source and movement in a sub-scanning direction of the light source, and determine a size of the document based on image data acquired by the imaging device. The circuitry is to determine a size in a main-scanning direction of the document based on: first image data acquired when the light source is switched off while the light source is at a first reading position; second image data acquired when the light source is switched on while the light source is at the first reading position; and third image data acquired when the light source is switched on while the light source is being moved from the first reading position to a second reading position.

5. 发明申请

US20200120224A1 DOCUMENT SIZE DETECTION DEVICE, IMAGE READING DEVICE, IMAGE FORMING APPARATUS, AND DOCUMENT SIZE DETECTING METHOD 审中-公开
公开(公告)号：US20200120224A1
公开(公告)日：2020-04-16
申请号：US16575457
申请日：2019-09-19
申请人： Tomohiro Sasa , Hiroki Shirado , Tadaaki Oyama , Tatsuya Ozaki , Kohsuke Nambara
发明人： Tomohiro Sasa , Hiroki Shirado , Tadaaki Oyama , Tatsuya Ozaki , Kohsuke Nambara
IPC分类号： H04N1/00
摘要： A document size detection device includes: a light source to irradiate a document with light; an imaging device to receive light reflected at the document; and circuitry to control switch on and off of the light source and movement in a sub-scanning direction of the light source, and determine a size of the document based on image data acquired by the imaging device. The circuitry is to determine a size in a main-scanning direction of the document based on: first image data acquired when the light source is switched off while the light source is at a first reading position; second image data acquired when the light source is switched on while the light source is at the first reading position; and third image data acquired when the light source is switched on while the light source is being moved from the first reading position to a second reading position.

6. 发明授权

US12066854B2 Data processing device, image reading apparatus, image forming apparatus, and method for processing data 有权
公开(公告)号：US12066854B2
公开(公告)日：2024-08-20
申请号：US17766254
申请日：2020-11-20
申请人： Hajime Tsukahara , Tomohiro Sasa
发明人： Hajime Tsukahara , Tomohiro Sasa
IPC分类号： G06F1/10 , G06F1/12 , G06F11/07
CPC分类号： G06F1/10 , G06F1/12 , G06F11/0733 , G06F11/0751 , G06F11/0772 , G06F11/0793
摘要： A data processing device comprises: a data receiver to receive data to be processed, an external clock, and a unit control signal determining a processing unit for the data to be processed from an outside, the data receiver including a PLL circuit to receive the external clock; a clock abnormality detector to operate based on a clock of a system different from a system of the external clock and detect abnormality of the external clock based on a lock signal output from the PLL circuit; and a data processing controller to control processing of the data. When abnormality of the external clock is detected, the data processing controller stops taking in the data to be processed, and when the external clock becomes normal again, take in the unit control signal and resume taking in the data to be processed.

7. 发明授权

US10093087B2 Distance measuring device, image forming apparatus, and distance measuring method 有权
公开(公告)号：US10093087B2
公开(公告)日：2018-10-09
申请号：US15696960
申请日：2017-09-06
申请人： Masaya Kawarada , Nobuyuki Satoh , Kenji Morita , Yuichi Sakurada , Tomohiro Sasa , Daisaku Horikawa
发明人： Masaya Kawarada , Nobuyuki Satoh , Kenji Morita , Yuichi Sakurada , Tomohiro Sasa , Daisaku Horikawa
IPC分类号： B41J29/393 , B41J2/045 , G01B11/14 , B41J19/14 , B41J2/21 , H04N1/04 , G06K15/10 , B41J2/125
摘要： A distance measuring device includes: an imaging unit that captures a test pattern image including a pair of first markers and a second marker that is formed under a condition different from a condition applied to the first markers; a position detecting unit that detects a position of each of the pair of first markers and the second marker in a captured image captured by the imaging unit; a ratio calculating unit that calculates a ratio of a distance between the pair of the first markers in the captured image and an actual distance between the pair of the first markers; and an actual distance calculating unit that calculates an actual distance between one of the first markers as the pair and the second marker by multiplying a distance between the one of the first markers as the pair and the second marker in the captured image by the ratio.

8. 发明授权

US09191535B2 Image forming apparatus, image forming method and storage medium 有权
标题翻译：图像形成装置，图像形成方法和存储介质
公开(公告)号：US09191535B2
公开(公告)日：2015-11-17
申请号：US14304202
申请日：2014-06-13
申请人： Tomohiro Sasa
发明人： Tomohiro Sasa
IPC分类号： H04N1/407 , G06T5/00 , B41J29/38 , H04N1/00 , H04N1/028
CPC分类号： H04N1/00755 , H04N1/00689 , H04N1/00734 , H04N1/0075 , H04N1/00753 , H04N1/02815
摘要： An image forming apparatus includes a detection unit that emits light on a recording medium or a platen and detects reflected light while the detection unit moves in a direction perpendicular to a transportation direction of the recording medium; a width calculation unit that compares a value indicative of light intensity responsive to the reflected light with a threshold, and calculates a width of the recording medium measured from a position of the detection unit where the value indicative of light intensity responsive to the reflected light becomes greater than or equal to the threshold; an image formation unit that performs an operation of forming an image based on the calculated width of the recording medium; and an image formation control unit that halts the operation of forming the image upon detecting that the calculated width is less than or equal to a predefined value.
摘要翻译：图像形成装置包括：检测单元，其在记录介质或台板上发光，并且在检测单元沿与记录介质的传送方向垂直的方向移动时检测反射光; 宽度计算单元，其将响应于反射光的光强度的值与阈值进行比较，并且计算从响应于反射光的表示光强度的值的检测单元的位置测量的记录介质的宽度变为大于或等于阈值; 图像形成单元，其基于计算出的记录介质的宽度执行形成图像的操作; 以及图像形成控制单元，其在检测到所计算的宽度小于或等于预定值时停止形成图像的操作。

9. 发明授权

US10158767B2 Image capturing apparatus, image forming apparatus, distance measuring method, and computer-readable recording medium 有权
公开(公告)号：US10158767B2
公开(公告)日：2018-12-18
申请号：US15174143
申请日：2016-06-06
申请人： Tomohiro Sasa , Nobuyuki Satoh , Yuichi Sakurada , Kenji Morita , Masaya Kawarada , Daisaku Horikawa
发明人： Tomohiro Sasa , Nobuyuki Satoh , Yuichi Sakurada , Kenji Morita , Masaya Kawarada , Daisaku Horikawa
IPC分类号： H04N1/04 , H04N1/00 , H04N1/60 , G01J3/50 , H04N1/387
摘要： An image capturing apparatus includes: a casing having an opening; a light source arranged inside the casing; a sensor arranged inside the casing and configured to capture, through the opening, an image of an object present outside the casing while the light source is on; and a distance calculator to calculate a distance between the casing and the object, based on an image that has been captured by the sensor and contains, within an image region of the object defined by the opening, a high-luminance region and low-luminance regions located more outside than the high-luminance region.

10. 发明授权

US11429141B2 Data processing device, image reading apparatus, image forming apparatus, and data processing method 有权
公开(公告)号：US11429141B2
公开(公告)日：2022-08-30
申请号：US16820728
申请日：2020-03-17
申请人： Tomohiro Sasa , Hajime Tsukahara
发明人： Tomohiro Sasa , Hajime Tsukahara
IPC分类号： G06F1/14 , G06F1/10
摘要： A data processing device includes a data processing circuit and a data processing control circuit. The data processing circuit is configured to perform data processing on processing target data by use of an external clock, the processing target data being included in a data signal received from an outside, the external clock being included in the data signal. The data processing control circuit is configured to detect a state of the external clock and control execution of the data processing on the processing target data in accordance with the state of the external clock. The data processing control circuit is configured to operate with a clock having a lower impedance than an impedance of the external clock, and discard the processing target data received during a period in which an abnormality of the external clock is detected, in a case of detecting the abnormality of the external clock.

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