Patents by Inventor Tetsuro Ashida

Tetsuro Ashida 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).

  • Publication number: 20210151850
    Abstract: According to the present invention, there is provided a power divider/combiner in which two transmission lines configured to connect between respective input/output terminals and an isolation resistor are at least partially adjusted to have suitable impedances during an even-mode operation and an odd-mode operation, for each of the even mode operation and the odd mode operation, to thereby ensure satisfactory reflection characteristics at the respective input/output terminals during the odd-mode operation, a satisfactory reflection characteristic at a common terminal during the even-mode operation, and satisfactory reflection characteristics at the respective input/output terminals during the even-mode operation over a wide band.
    Type: Application
    Filed: June 28, 2017
    Publication date: May 20, 2021
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hideharu YOSHIOKA, Hiroyuki AOYAMA, Naofumi YONEDA, Tetsuro ASHIDA
  • Publication number: 20180041007
    Abstract: A temperature control circuit includes a temperature detector to detect temperature of an LD, a TEC to control temperature of the LD, a current calculation circuit to calculate an amount of current caused to flow through the TEC on the basis of a temperature of the LD and a target temperature, a current control circuit to control current to flow through the TEC on the basis of the amount of current, and a target temperature calculation circuit to set a first target temperature as the target temperature during LD shutdown cancellation, to set the target temperature to monotonously decrease from the first target temperature to a second target temperature lower than the first target temperature until a certain time elapses since an LD shutdown start, and to set the second target temperature as the target temperature when the certain time elapses since the LD shutdown start.
    Type: Application
    Filed: May 27, 2015
    Publication date: February 8, 2018
    Applicant: Mitsubishi Electric Corporation
    Inventor: Tetsuro ASHIDA
  • Publication number: 20170063452
    Abstract: An APD that converts a received optical signal to a current signal, a current mirror circuit that duplicates the current signal and outputs a duplicate current signal as a mirror current, a resistor that converts the mirror current to a voltage, a sample and hold circuit that samples the converted voltage at a timing when a trigger voltage is input and holds a value of the sampled voltage, an inverter connected between the resistor and the sample and hold circuit, and a capacitor connected to the output side of the inverter are included, and the inverter allows the capacitor to be connected to the input side of the sample and hold circuit when a trigger voltage is input to the sample and hold circuit and allows the capacitor to be unconnected to the input side of the sample and hold circuit when the trigger voltage is not input to the sample and hold circuit.
    Type: Application
    Filed: June 5, 2014
    Publication date: March 2, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventors: Satoshi SHIRAI, Tetsuro ASHIDA, Masamichi NOGAMI
  • Patent number: 8848077
    Abstract: An imaging apparatus includes a solid-state imaging device that has a plurality of pairs of a first photoelectric conversion element and a second photoelectric conversion element, which have different spectral sensitivity characteristics, respectively. A wavelength range where the first photoelectric conversion element of each pair mainly has a spectral sensitivity and a wavelength range where the second photoelectric conversion element of the pair mainly has a spectral sensitivity fall within wavelength ranges of specific colors of visible light respectively. The plurality of pairs include a plurality of types of pairs having different specific colors. A half-width in a spectral sensitivity characteristic of the second photoelectric conversion element of each pair is wider than a half width in a spectral sensitivity characteristic of the first photoelectric conversion element of the pair.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: September 30, 2014
    Assignee: FUJIFILM Corporation
    Inventors: Kousuke Takahashi, Noriko Kawamura, Tomoyuki Kawai, Seiji Tanaka, Tetsuro Ashida, Takehiro Kouguchi, Hisashi Endo, Tomoki Inoue
  • Patent number: 8842203
    Abstract: A solid-state imaging device includes a plurality of pairs of a first photoelectric conversion element and a second photoelectric conversion element which have different spectral sensitivity characteristics. A wavelength range where the first photoelectric conversion element of each pair mainly has a spectral sensitivity and a wavelength range where the second photoelectric conversion element of each pair mainly has a spectral sensitivity respectively fall within a wavelength ranges of specific colors of visible light. The plurality of pairs include a plurality of types of pairs having different specific colors of visible light. The half width in the spectral sensitivity characteristic of the first photoelectric conversion element of the each pair is wider than a half width in the spectral sensitivity characteristic of the second photoelectric conversion element of the each corresponding pair.
    Type: Grant
    Filed: October 19, 2012
    Date of Patent: September 23, 2014
    Assignee: FUJIFILM Corporation
    Inventors: Tomoyuki Kawai, Seiji Tanaka, Tetsuro Ashida, Takehiro Kouguchi, Hisashi Endo, Tomoki Inoue
  • Patent number: 8836815
    Abstract: A WB gain calculation unit 24 determines a light source of a Surface A on the basis of color distribution of the Surface A and a black body locus AD, determines a light source of a Surface B on the basis of color distribution of the Surface B and a black body locus BD and determines a light source of a Surface AB on the basis of color distribution of the Surface AB and a block body locus ABD and calculates the white balance gains on the basis of the determined light sources.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: September 16, 2014
    Assignee: FUJIFILM Corporation
    Inventors: Tetsuro Ashida, Tomoyuki Kawai, Seiji Tanaka, Hisashi Endo, Takehiro Kouguchi
  • Patent number: 8810678
    Abstract: An imaging apparatus includes a solid-state imaging device and a driving unit. The solid-state imaging device has a plurality of pairs of first and second photoelectric conversion elements having different spectral sensitivity characteristics. The driving unit independently controls an exposure time of a first group of the plurality of first photoelectric conversion elements and an exposure time of a second group of the plurality of second photoelectric conversion elements. A wavelength range where the first photoelectric conversion element of each pair mainly has a spectral sensitivity and a wavelength range where the second photoelectric conversion element of each pair mainly has spectral sensitivity fall within the respective wavelength ranges of specific colors of visible light.
    Type: Grant
    Filed: October 19, 2012
    Date of Patent: August 19, 2014
    Assignee: FUJIFILM Corporation
    Inventors: Noriko Kawamura, Tomoyuki Kawai, Seiji Tanaka, Tetsuro Ashida, Takehiro Kouguchi, Hisashi Endo
  • Patent number: 8743238
    Abstract: In an image processing method according to an aspect of the presently disclosed subject matter, a captured image obtained by continuous imaging is acquired, the captured image is divided into a plurality of divided areas, a flicker that flashes is detected for each of the divided areas, it is detected, for each of the divided areas where the flicker has been detected, whether a divided area is an LED area including light from a light emitting diode (LED) based on a luminance difference between a luminance in a turn-on state and a luminance in an turn-off state, and LED area information is output.
    Type: Grant
    Filed: May 22, 2013
    Date of Patent: June 3, 2014
    Assignee: FUJIFILM Corporation
    Inventors: Tetsuro Ashida, Satoru Obinata
  • Patent number: 8736724
    Abstract: Two kinds of color images, obtained by a solid-state imaging device, having different color tones are combined with each other. A first captured color image due to a first pixel group (pixels in which spectral sensitivities of color filters are wide) of the solid-state imaging device is processed. A second captured color image due to a second pixel group (pixels in which spectral sensitivities of color filters are narrow) is processed. The level difference between captured image signals of the pixels of the first pixel group and captured image signals of the pixels of the second pixel group, and due to the spectral sensitivity difference between the color filters in which the spectral sensitivities are wide and narrow is obtained (steps S1 and S2). The level difference is corrected. The first captured color image and the second captured color image are combined with each other.
    Type: Grant
    Filed: October 19, 2012
    Date of Patent: May 27, 2014
    Assignee: FUJIFILM Corporation
    Inventors: Seiji Tanaka, Tetsuro Ashida, Tomoyuki Kawai, Takehiro Kouguchi, Hisashi Endo
  • Publication number: 20130258134
    Abstract: In an image processing method according to an aspect of the presently disclosed subject matter, a captured image obtained by continuous imaging is acquired, the captured image is divided into a plurality of divided areas, a flicker that flashes is detected for each of the divided areas, it is detected, for each of the divided areas where the flicker has been detected, whether a divided area is an LED area including light from a light emitting diode (LED) based on a luminance difference between a luminance in a turn-on state and a luminance in an turn-off state, and LED area information is output.
    Type: Application
    Filed: May 22, 2013
    Publication date: October 3, 2013
    Applicant: FUJIFILM Corporation
    Inventors: Tetsuro ASHIDA, Satoru OBINATA
  • Patent number: 8229217
    Abstract: Whether purple fringing (PF) has occurred is determined for every pixel of interest P(i,j) (step 41). The RGB ratio of a purple-fringed pixel P(i,j) at which PF has been determined and the RGB ratio of a PF convergence pixel P(m,n) spaced N pixels away from the purple-fringed pixel P(i,j) within a zone in the proximity of the purple-fringed pixel P(i,j) are calculated (steps 42, 43). A correction coefficient Rev (i,j) that causes the RGB ratio of the purple-fringed pixel P(i,j) to approach the RGB ratio of the PF convergence pixel P(m,n) is calculated (step 44). The purple-fringed pixel P(i,j) is color-corrected using the correction coefficient Rev (i,j) calculated. Purple fringing is made inconspicuous by changing the color of image portions at which purple fringing has occurred.
    Type: Grant
    Filed: October 13, 2010
    Date of Patent: July 24, 2012
    Assignee: Fujifilm Corporation
    Inventors: Shinya Fujiwara, Tetsuro Ashida, Seiji Tanaka
  • Publication number: 20120082380
    Abstract: Whether purple fringing (PF) has occurred is determined for every pixel of interest P(i,j) (step 41). The RGB ratio of a purple-fringed pixel P(i,j) at which PF has been determined and the RGB ratio of a PF convergence pixel P(m,n) spaced N pixels away from the purple-fringed pixel P(i,j) within a zone in the proximity of the purple-fringed pixel P(i,j) are calculated (steps 42, 43). A correction coefficient Rev (i,j) that causes the RGB ratio of the purple-fringed pixel P(i,j) to approach the RGB ratio of the PF convergence pixel P(m,n) is calculated (step 44). The purple-fringed pixel P(i,j) is color-corrected using the correction coefficient Rev (i,j) calculated. Purple fringing is made inconspicuous by changing the color of image portions at which purple fringing has occurred.
    Type: Application
    Filed: October 13, 2010
    Publication date: April 5, 2012
    Inventors: Shinya Fujiwara, Tetsuro Ashida, Seiji Tanaka
  • Patent number: 7643072
    Abstract: The present invention provides an image capturing apparatus which enables a desired image quality to be maintained regardless of transfer efficiency of a CCD image capturing element. R, G and B signals (CCD-RAW data) are acquired from the CCD image capturing element. In addition, various information, namely transfer efficiency of the CCD image capturing element, camera sensitivity upon photography, drive frequency of the CCD image capturing element, WB gains of the acquired R, G and B signals, pixel count, internal temperature of camera or temperature of the CCD image capturing element, and CCD color filter array of the CCD image capturing element are acquired. Signal processing on the acquired R, G and B signals is changed according to the acquired information in order to suppress image quality deterioration due to transfer efficiency degradation.
    Type: Grant
    Filed: July 19, 2006
    Date of Patent: January 5, 2010
    Assignee: Fujifilm Corporation
    Inventors: Tetsuro Ashida, Kousuke Irie, Hitoshi Yamashita, Tooru Ueda, Kenkichi Hayashi, Takeshi Miyashita
  • Patent number: 7457479
    Abstract: To provide an image playback apparatus that enables an image picked up and recorded with a wide dynamic range to be changed to the exposure desired by a viewer. An apparatus that performs image playback by outputting, to a monitor or printer, image data stored in an image storage unit such as built-in memory or a memory card, is equipped with a line-of-sight detection apparatus that detects the line-of-sight direction of the person viewing the image, or a touch panel, and is configured so that the area looked at by the viewer is automatically detected, or an arbitrary part of the screen can be specified by the viewer himself or herself from the touch panel. At first, conventional dynamic range playback is performed, then the dynamic range is changed, by changing the tone conversion curve, etc., for the part where the line-of-sight was detected within the screen, or the part specified by means of the touch panel, and a white-skip part or blackening part is reproduced appropriately.
    Type: Grant
    Filed: November 8, 2000
    Date of Patent: November 25, 2008
    Assignee: Fujifilm Corporation
    Inventors: Tetsuro Ashida, Kimiaki Nakada
  • Publication number: 20070040916
    Abstract: The present invention provides an image capturing apparatus which enables a desired image quality to be maintained regardless of transfer efficiency of a CCD image capturing element. R, G and B signals (CCD-RAW data) are acquired from the CCD image capturing element. In addition, various information, namely transfer efficiency of the CCD image capturing element, camera sensitivity upon photography, drive frequency of the CCD image capturing element, WB gains of the acquired R, G and B signals, pixel count, internal temperature of camera or temperature of the CCD image capturing element, and CCD color filter array of the CCD image capturing element are acquired. Signal processing on the acquired R, G and B signals is changed according to the acquired information in order to suppress image quality deterioration due to transfer efficiency degradation.
    Type: Application
    Filed: July 19, 2006
    Publication date: February 22, 2007
    Inventors: Tetsuro Ashida, Kousuke Irie, Hitoshi Yamashita, Tooru Ueda, Kenkichi Hayashi, Takeshi Miyashita
  • Patent number: 7129980
    Abstract: When a shutter release button of an image capturing apparatus is half pressed, an exposure time t is determined by a normal AE function. Then, if a shutter release button is fully pressed, an image is captured with the exposure time t, and the captured image is stored in a frame memory. At the same time, a color-coding circuit color-codes the captured image according to luminance thresholds, and the color-coded image is displayed on an LCD. If a user selects a color of an area equivalent to a main subject with reference to the color-coded image, a dynamic range, gamma characteristics, and the like of the image are determined so that the area in the selected color can have a correct luminance. The image is corrected accordingly, and image data acquired by the correction is stored in a recording part.
    Type: Grant
    Filed: January 27, 2000
    Date of Patent: October 31, 2006
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Tetsuro Ashida
  • Patent number: 6833864
    Abstract: An image capturing apparatus determines whether, if images are sequentially captured at a predetermined time interval, a main subject will hardly move in the images. The determination is made based on the detection by a tripod detection switch, which detects whether the image capturing apparatus is mounted on a tripod or not, etc. Only when it is determined that the main subject will be at the same position in the images, an imaging device including a solid state image sensor captures images multiple times at the predetermined time interval while an exposure control part changes exposures for the plurality of images, respectively. Then, the plurality of images with different exposures are combined into one image. Consequently, it is possible to combine the captured images, in which the main subject is at the same position, to obtain a desirable image with a broad dynamic range.
    Type: Grant
    Filed: July 8, 1999
    Date of Patent: December 21, 2004
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Tetsuro Ashida
  • Patent number: 6560410
    Abstract: A camera section photographs a camera test chart. A calibration controller of the camera section reads out image data of the camera test chart, and executes calibration of the camera section by use of characteristic values of obtained image data and standard data, which is stored in an internal memory. Next, a printer test chart, printed by a printer section, is photographed by the calibrated camera section. Image data of the printer test chart is sent to the printer section from the camera section. A calibration controller of the printer section performs calibration of the printer section by use of characteristic values of obtained image data and standard data, which is stored in an internal memory. By calibrating both the camera and the printer sections, it is possible to execute effective calibration of the apparatus.
    Type: Grant
    Filed: May 25, 2001
    Date of Patent: May 6, 2003
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Koji Ichikawa, Makoto Tsugita, Tetsuro Ashida
  • Publication number: 20020196289
    Abstract: A preview image output system compares image data and a preview file list that records data such as the date and time when thumbnail images representative of image files are displayed for preview. A determination is made, based on the comparison, which of the images have not been output for preview, and image data representative of the images that is determined not to have been output for preview is read out, and thumbnail images of the images represented by the image data that is determined not to have been output for preview are first displayed for preview.
    Type: Application
    Filed: June 21, 2002
    Publication date: December 26, 2002
    Inventors: Koichi Sakamoto, Kazuhiko Takemura, Koji Ichikawa, Tetsuro Ashida
  • Publication number: 20010046381
    Abstract: A camera section photographs a camera test chart. A calibration controller of the camera section reads out image data of the camera test chart, and executes calibration of the camera section by use of characteristic values of obtained image data and standard data, which is stored in an internal memory. Next, a printer test chart, printed by a printer section, is photographed by the calibrated camera section. Image data of the printer test chart is sent to the printer section from the camera section. A calibration controller of the printer section performs calibration of the printer section by use of characteristic values of obtained image data and standard data, which is stored in an internal memory. By calibrating both the camera and the printer sections, it is possible to execute effective calibration of the apparatus.
    Type: Application
    Filed: May 25, 2001
    Publication date: November 29, 2001
    Applicant: FUJI PHOTO FILM CO., LTD.
    Inventors: Koji Ichikawa, Makoto Tsugita, Tetsuro Ashida