Patents by Inventor Tetsuichiro Yamamoto
Tetsuichiro Yamamoto has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11743408Abstract: The present invention provides a control method of an image reading device, an image reading device, and a non-transitory computer-readable medium having a program stored thereon, which avoid a reduction in reading resolution. The control method of the image reading device includes: a first step (ST101) of generating N line-shaped images indicating N line-shaped regions (W11) in an imaging target (T1) being conveyed in a conveying direction (X1) by imaging the N line-shaped regions (W11) extending in a direction perpendicular to the conveying direction (X1); a second step (ST102) of performing the same step as the first step (ST101) at a point in time when the imaging target (T1) is conveyed by an amount associated to a width (11a) of N?1 line-shaped regions; and a step (ST103) of generating a read image by arranging the N line-shaped images generated in each of the steps in ascending order.Type: GrantFiled: February 9, 2021Date of Patent: August 29, 2023Assignee: NEC Platforms, Ltd.Inventor: Tetsuichiro Yamamoto
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Publication number: 20230077148Abstract: The present invention provides a control method of an image reading device, an image reading device, and a non-transitory computer-readable medium having a program stored thereon, which avoid a reduction in reading resolution. The control method of the image reading device includes: a first step (ST101) of generating N line-shaped images indicating N line-shaped regions (W11) in an imaging target (T1) being conveyed in a conveying direction (X1) by imaging the N line-shaped regions (W11) extending in a direction perpendicular to the conveying direction (X1); a second step (ST102) of performing the same step as the first step (ST101) at a point in time when the imaging target (T1) is conveyed by an amount associated to a width (11a) of N?1 line-shaped regions; and a step (ST103) of generating a read image by arranging the N line-shaped images generated in each of the steps in ascending order.Type: ApplicationFiled: February 9, 2021Publication date: March 9, 2023Applicant: NEC Platforms, Ltd.Inventor: Tetsuichiro Yamamoto
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Patent number: 9294651Abstract: An image reading device includes: a CCD for reading an image on a document to output an image signal; a light source for switchingly emitting visible light and non-visible light; and lighting control means for controlling lighting periods of the light source. The lighting control means is adapted to perform control such that a first light source lighting period for applying non-visible light is longer than a second light source lighting period for applying visible light. The image reading device also includes splitting means for splitting the image signals outputted from the CCD into an image signal upon application of visible light and an image signal upon application of non-visible light.Type: GrantFiled: April 8, 2010Date of Patent: March 22, 2016Assignee: NEC Engineering, LTD.Inventors: Kouji Okada, Tetsuichiro Yamamoto, Hiroshi Hoshimiya
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Patent number: 9167123Abstract: The present invention provides an image reader apparatus capable of obtaining an image having stable brightness while suppressing an increase of the cost of the apparatus. The image reader apparatus 1 for reading an image on a document 2 being fed and outputting an image signal includes a synchronization signal generation circuit 4 for generating a synchronization signal SS synchronous with a feed timing and a feed cycle of the document 2, a CCD 6 for reading an image on the document 2 in synchronism with the synchronization signal SS, an LED 9 for emitting white light, and a lighting control circuit 7 for turning the LED 9 on in synchronism with the synchronization signal SS and turning the light source off so that a lighting period is equalized for each line irrespective of a variation of the feed cycle of the document 2. The lighting control circuit 7 turns the LED 9 off so that the lighting period of the LED 9 is equal to a predetermined preset period.Type: GrantFiled: December 22, 2009Date of Patent: October 20, 2015Assignee: NEC Engineering, Ltd.Inventors: Kouji Okada, Tetsuichiro Yamamoto, Hiroshi Hoshimiya
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Patent number: 8854702Abstract: An image reading apparatus includes a touch panel that outputs a press position pressed by a finger as coordinate information in a sub-scanning direction, the finger being placed on the surface of the touch panel, a CCD that takes an image of the finger placed on the touch panel from the rear side of the touch panel in a main-scanning direction, and outputs an image signal, and a motor that moves the CCD in the sub-scanning direction so as to follow a rotational movement of the finger based on the movement amount detected by the movement detection unit.Type: GrantFiled: August 9, 2011Date of Patent: October 7, 2014Assignee: NEC Engineering, Ltd.Inventor: Tetsuichiro Yamamoto
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Publication number: 20130300852Abstract: An image reading device includes: a diffuser for resting a finger on its upper surface and for diffusing light entering from its lower surface; a light source for irradiating the finger rested on the diffuser with light from the lower surface of the diffuser at a predetermined angle of irradiation; a mirror for receiving the light reflected from the finger on the diffuser which has been emitted from the light source; a CCD for, by receiving the light reflected with the mirror, capturing an image of the finger on the diffuser in a horizontal scanning direction from the lower surface of the diffuser, and then outputting an image signal; and a motor for moving, in a vertical scanning direction, a reading unit which includes at least the light source, the mirror, and the CCD. The upper surface of the diffuser on which the finger is rested is set to be a diffusion surface, and the lower surface of the diffuser through which the light from the light source enters is set as a non-diffusion surface.Type: ApplicationFiled: January 23, 2012Publication date: November 14, 2013Inventor: Tetsuichiro Yamamoto
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Publication number: 20130176604Abstract: An image reading apparatus includes a touch panel that outputs a press position pressed by a finger as coordinate information in a sub-scanning direction, the finger being placed on the surface of the touch panel, a CCD that takes an image of the finger placed on the touch panel from the rear side of the touch panel in a main-scanning direction, and outputs an image signal, and a motor that moves the CCD in the sub-scanning direction so as to follow a rotational movement of the finger based on the movement amount detected by the movement detection unit.Type: ApplicationFiled: August 9, 2011Publication date: July 11, 2013Inventor: Tetsuichiro Yamamoto
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Publication number: 20120127543Abstract: An image reading device includes: a CCD for reading an image on a document to output an image signal; a light source for switchingly emitting visible light and non-visible light; and lighting control means for controlling lighting periods of the light source. The lighting control means is adapted to perform control such that a first light source lighting period for applying non-visible light is longer than a second light source lighting period for applying visible light. The image reading device also includes splitting means for splitting the image signals outputted from the CCD into an image signal upon application of visible light and an image signal upon application of non-visible light.Type: ApplicationFiled: April 8, 2010Publication date: May 24, 2012Applicant: NEC ENGINEERING, LTD.Inventors: Kouji Okada, Tetsuichiro Yamamoto, Hiroshi Hoshimiya
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Publication number: 20110255118Abstract: The present invention provides an image reader apparatus capable of obtaining an image having stable brightness while suppressing an increase of the cost of the apparatus. The image reader apparatus 1 for reading an image on a document 2 being fed and outputting an image signal includes a synchronization signal generation circuit 4 for generating a synchronization signal SS synchronous with a feed timing and a feed cycle of the document 2, a CCD 6 for reading an image on the document 2 in synchronism with the synchronization signal SS, an LED 9 for emitting white light, and a lighting control circuit 7 for turning the LED 9 on in synchronism with the synchronization signal SS and turning the light source off so that a lighting period is equalized for each line irrespective of a variation of the feed cycle of the document 2. The lighting control circuit 7 turns the LED 9 off so that the lighting period of the LED 9 is equal to a predetermined preset period.Type: ApplicationFiled: December 22, 2009Publication date: October 20, 2011Inventors: Kouji Okada, Tetsuichiro Yamamoto, Hiroshi Hoshimiya
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Patent number: 6943922Abstract: An image reading apparatus is provided which is capable of reading an original document at a higher speed. M pieces of lines on the surface of the original document can be simultaneously read by M pieces of line-like strings of light sensing devices making up a CCD (Charge-Coupled Device) having an interval represented by N pieces of lines to be read. When simultaneous reading is completed, the original document is moved to a line existing apart by L pieces of lines from the lines that have been read. While the original document is moving, image signals of lines that have been read are A/D (analog to digital) converted and then stored to memory regions. Simultaneous reading operation and subsequent storing are sequentially performed on lines on which the line-like strings of light sensing devices are placed.Type: GrantFiled: April 25, 2001Date of Patent: September 13, 2005Assignee: NEC CorporationInventors: Tetsuichiro Yamamoto, Kouji Nakahara
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Patent number: 6713744Abstract: The scanner includes the switch 10 that is closed when a document is read, the boosted-voltage conversion circuit 12 that boosts a DC voltage of 12 volts (V) supplied from a power source (not shown) and then converts it into a high-frequency signal b of 50 KHz, the temperature detection circuit 20 formed of the thermistor 15 for ambient temperature detection and correction circuit 16, and the dimmer control circuit 13 that varies the high-frequency signal b from the boosted-voltage conversion circuit 12 according to a temperature detected by the thermistor 15 and produces a drive signal c to vary the luminance of the cold-cathode-tube light source 2.Type: GrantFiled: October 25, 2000Date of Patent: March 30, 2004Assignee: NEC CorporationInventors: Shinya Kubo, Tetsuichiro Yamamoto
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Patent number: 6628437Abstract: An image reading apparatus according to the present invention employs an optical system including a fluorescent lamp as a line light source for illumination of the image source. An image reader housing has an elongated window. The translucent lamp positioned within the housing has a light emitting tube. The light emitting tube includes a middle section that is elongated in a direction parallel to the window width with a length at least equal to the maximum extent of the window width. The light emitting tube includes two boundary sections between which the middle section extends. The two boundary sections have bent ends connected to the middle section at ends thereof, respectively.Type: GrantFiled: October 23, 1998Date of Patent: September 30, 2003Assignee: NEC CorporationInventors: Hiroya Ooki, Tetsuichiro Yamamoto
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Publication number: 20020069111Abstract: A consumable item providing system, includes: a consumptive amount calculating unit and a controlling unit. The consumptive amount calculating unit is provided in a information communicating unit and has an initial information of an initial stock amount of a consumable item consumed by the information communicating unit and measures a consumptive amount of the consumable item to calculate a current stock amount of the consumable item based on the initial stock amount and the consumptive amount. The controlling unit responds to the current stock amount to output a consumable item information with regard to the consumable item when the current stock amount is equal to or less than a reference value.Type: ApplicationFiled: December 4, 2001Publication date: June 6, 2002Inventor: Tetsuichiro Yamamoto
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Publication number: 20020063785Abstract: An image reading apparatus is provided which is capable of reading an original document at a higher speed. M pieces of lines on the surface of the original document can be simultaneously read by M pieces of line-like strings of light sensing devices making up a CCD (Charge-Coupled Device) having an interval represented by N pieces of lines to be read. When simultaneous reading is completed, the original document is moved to a line existing apart by L pieces of lines from the lines that have been read. While the original document is moving, image signals of lines that have been read are A/D (analog to digital) converted and then stored to memory regions. Simultaneous reading operation and subsequent storing are sequentially performed on lines on which the line-like strings of light sensing devices are placed.Type: ApplicationFiled: April 25, 2001Publication date: May 30, 2002Applicant: NEC CORPORATIONInventors: Tetsuichiro Yamamoto, Kouji Nakahara
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Patent number: 6396648Abstract: An image reader including a light source irradiating light to a reading object, a reading device reading an image on the reading object based on the radiated light; and a lens focusing the image onto the reading device and having a characteristic by which a distortion rate is increased from the central part to the end part. The distortion rate of the end part is set to a value in which there is no need to complement the read image.Type: GrantFiled: March 17, 2000Date of Patent: May 28, 2002Assignee: NEC CorporationInventors: Tetsuichiro Yamamoto, Shinya Kubo
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Patent number: 6313586Abstract: An image input apparatus comprises a cold cathode tube light source and a solid imaging device. The image input apparatus reads an image from a document paper by receiving at the solid imaging device a reflected light which is obtained by reflecting a light of the cold cathode tube light source on the document paper. On putting cold cathode tube light source into an on-state, an inverter control circuit controls an inverter to make the inverter supply the cold cathode tube light source with an overcurrent higher than a predetermined tube current which is for use in continuously and stably irradiating a predetermined luminous energy from the cold cathode tube light source. After the overcurrent is applied to the cold cathode tube light source during a predetermined duration, the inverter control circuit controls the inverter to make the inverter reduce the overcurrent to a predetermined current in accordance with an output of the solid imaging device.Type: GrantFiled: March 30, 2000Date of Patent: November 6, 2001Assignees: NEC Corporation, Murata Manufacturing Co., Ltd.Inventors: Tetsuichiro Yamamoto, Tatsuya Shimizu, Yutaka Okazaki
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Patent number: 6239884Abstract: A scanner according to the present invention includes a cold-cathode tube for radiating light on a manuscript reading position where an image on a manuscript is detected by an image sensor, a pre-heater for preheating before the lighting of the cold-cathode tube, a light source for detection connected to the pre-heater in series for radiating light toward the manuscript reading position to detect the end of the manuscript, a detecting element for detecting light reflected in the manuscript reading position from the light source for detection and generating a detection signal showing that the end of the manuscript is detected and a driving circuit for controlling the lighting of the cold-cathode tube and the stop of the pre-heater according to the detection signal from the detecting element.Type: GrantFiled: February 10, 2000Date of Patent: May 29, 2001Assignee: NEC CorporationInventor: Tetsuichiro Yamamoto
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Patent number: 5963343Abstract: When the scanner moves over the subject copy, the first reading elements of a close contact type image sensor (1) read the copy. As the movement causes a platen roller (5) to rotate, an encoder ring (4), having a prescribed distinguishing pattern (10) printed within, rotates. Second reading elements configured outside the copy reading range of the close contact type image sensor (1) read the distinguishing pattern, which moves over the reading face as the encoder ring (4) rotates. The second reading elements which read the distinguishing pattern are driven independently of the first reading elements for reading the subject copy, and their reading period is shorter than that of the first reading elements. This configuration enables the moving speed to be accurately detected even when the scanner moves faster than the copy reading speed.Type: GrantFiled: February 20, 1997Date of Patent: October 5, 1999Assignee: NEC CorporationInventors: Shinya Kubo, Tetsuichiro Yamamoto
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Patent number: 5852686Abstract: An image reading device, particularly a hand scanner, capable of setting a reading position in the main scanning direction accurately at all times. A stage glass is affixed to the reading surface of the hand scanner. A reference line is printed on the stage glass outside of the valid reading range of a CCD (Charge Coupled Device) image scanner. For the adjustment of the valid reading range, the image sensor and a lens are roughly adjusted such that data representative of the reference line appears at the edge of the valid reading range. Subsequently, the valid reading range is electrically shifted in the main scanning direction such that the reference line disappears.Type: GrantFiled: October 10, 1996Date of Patent: December 22, 1998Assignee: NEC CorporationInventors: Shinya Kubo, Tetsuichiro Yamamoto, Yasushi Matsumoto