Patents by Inventor Danjun ZHAO

Danjun ZHAO 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).

  • Patent number: 10677655
    Abstract: A measuring device includes a first light receiving element that receives measurement light and outputs a first output value, and a second light receiving element that receives the measurement light and outputs a second output value which is different from the first output value. A weighted composition is performed on the first output value and the second output value.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: June 9, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Danjun Zhao, Masanobu Kobayashi
  • Patent number: 10419623
    Abstract: A measuring apparatus includes a carriage on which an imaging control section that controls imaging of an object is mounted, a movement control section that moves the carriage relative to the object, an image processing section that acquires image information, a first signal line that connects the imaging control section and the movement control section to each other, and a second signal line that connects the imaging control section and the image processing section to each other. A control signal is transmitted over the first signal line, and a data signal is transmitted over the second signal line.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: September 17, 2019
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Danjun Zhao, Tetsuo Tatsuda
  • Patent number: 10148835
    Abstract: An image processing device is adapted to be provided with a photographing device configured to generate image data by photographing a print pattern and to output the image data, vertical synchronization signals, and horizontal synchronization signals. The image processing device includes: a first processor configured to, based on the synchronization signals, determine occurrence of abnormalities of the image data that is input, a memory including two storage areas, and a second processor. The second processor is configured to perform for each frame of the image data an addition process while exchanging a first storage area and a second storage area different from the first storage area of the memory with each other.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: December 4, 2018
    Assignee: Seiko Epson Corporation
    Inventor: Danjun Zhao
  • Publication number: 20180340828
    Abstract: A measuring device includes a first light receiving element that receives measurement light and outputs a first output value, and a second light receiving element that receives the measurement light and outputs a second output value which is different from the first output value. A weighted composition is performed on the first output value and the second output value.
    Type: Application
    Filed: August 2, 2018
    Publication date: November 29, 2018
    Inventors: Danjun ZHAO, Masanobu KOBAYASHI
  • Publication number: 20180316812
    Abstract: An image processing device is adapted to be provided with a photographing device configured to generate image data by photographing a print pattern and to output the image data, vertical synchronization signals, and horizontal synchronization signals. The image processing device includes: a first processor configured to, based on the synchronization signals, determine occurrence of abnormalities of the image data that is input, a memory including two storage areas, and a second processor. The second processor is configured to perform for each frame of the image data an addition process while exchanging a first storage area and a second storage area different from the first storage area of the memory with each other.
    Type: Application
    Filed: April 25, 2018
    Publication date: November 1, 2018
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Danjun Zhao
  • Patent number: 10066996
    Abstract: A measuring device includes a first light receiving element that receives measurement light and outputs a first output value, and a second light receiving element that receives the measurement light and outputs a second output value which is different from the first output value. A weighted composition is performed on the first output value and the second output value.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: September 4, 2018
    Assignee: Seiko Epson Corporation
    Inventors: Danjun Zhao, Masanobu Kobayashi
  • Patent number: 10063785
    Abstract: An imaging device outputs imaging data captured with a predetermined exposure time, and a brightness determination unit determines whether the brightness of the imaging data is within a predetermined range. Re-imaging is performed with the exposure time changed when the brightness of the imaging data is not within the predetermined range. The re-imaging is performed with the exposure time lengthened when the brightness of the imaging data is less than a determination value, and the re-imaging is performed with the exposure time shortened when the brightness of the imaging data is saturated.
    Type: Grant
    Filed: August 14, 2015
    Date of Patent: August 28, 2018
    Assignee: Seiko Epson Corporation
    Inventors: Danjun Zhao, Tetsuo Tatsuda
  • Publication number: 20180241888
    Abstract: A measuring apparatus includes a carriage on which an imaging control section that controls imaging of an object is mounted, a movement control section that moves the carriage relative to the object, an image processing section that acquires image information, a first signal line that connects the imaging control section and the movement control section to each other, and a second signal line that connects the imaging control section and the image processing section to each other. A control signal is transmitted over the first signal line, and a data signal is transmitted over the second signal line.
    Type: Application
    Filed: February 20, 2018
    Publication date: August 23, 2018
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Danjun Zhao, Tetsuo Tatsuda
  • Patent number: 9702760
    Abstract: A spectrometry apparatus includes a wavelength variable interference filter emitting light of various predetermined wavelengths; a roll shutter imaging element having pixels accumulating electric charges when exposed to light, and forming one frame by photodetection for each pixel block including pixels with a predetermined time delay for each pixel block, in which the imaging element accumulates electric charges in a photodetection period, and outputs a detection signal in response to the accumulated electric charges in a non-photodetection period; and a spectroscopic controller controlling the wavelength change driving of the emitted light of the wavelength variable interference filter. For the one frame, the spectroscopic controller starts the wavelength change driving at an end timing of the photodetection period of a final pixel block for which the photodetection process is performed at the end.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: July 11, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Danjun Zhao, Tetsuo Tatsuda, Shinichi Arazaki
  • Publication number: 20170074723
    Abstract: A measuring device includes a first light receiving element that receives measurement light and outputs a first output value, and a second light receiving element that receives the measurement light and outputs a second output value which is different from the first output value. A weighted composition is performed on the first output value and the second output value.
    Type: Application
    Filed: September 8, 2016
    Publication date: March 16, 2017
    Inventors: Danjun ZHAO, Masanobu KOBAYASHI
  • Publication number: 20160116336
    Abstract: Provided is an optical module including a wavelength-selective interference filter capable of selecting light of a predetermined wavelength from incident light and changing the wavelength of emitted light, a rolling shutter capturing element in which a light receiving process including a light exposing period for accumulating charges as well as a light blocking period for outputting a detection signal corresponding to the charges accumulated during the light exposing period is sequentially performed in a delayed manner per pixel row configured of a plurality of pixels, and a filter drive unit controlling a wavelength changing drive of the wavelength-selective interference filter.
    Type: Application
    Filed: October 27, 2015
    Publication date: April 28, 2016
    Inventors: Danjun ZHAO, Tetsuo TATSUDA
  • Publication number: 20160057330
    Abstract: An imaging device outputs imaging data captured with a predetermined exposure time, and a brightness determination unit determines whether the brightness of the imaging data is within a predetermined range. Re-imaging is performed with the exposure time changed when the brightness of the imaging data is not within the predetermined range. The re-imaging is performed with the exposure time lengthened when the brightness of the imaging data is less than a determination value, and the re-imaging is performed with the exposure time shortened when the brightness of the imaging data is saturated.
    Type: Application
    Filed: August 14, 2015
    Publication date: February 25, 2016
    Inventors: Danjun ZHAO, Tetsuo TATSUDA
  • Patent number: 9182279
    Abstract: An optical module includes a wavelength variable interference filter that selects light of a predetermined wavelength from incident light, and can change the wavelength of emitted light; a global shutter imaging element that accumulates electric charges while being exposed to the emitted light, and outputs a detection signal in response to the accumulated electric charges; an imaging element controller for setting a photodetection period during which the electric charges are accumulated in the imaging element, and a standby period during which the electric charges accumulated in the imaging elements are reset; and a spectroscopic controller for controlling the wavelength change driving of the emitted light. The imaging element controller sets the duration of the standby period to a minimum drive time for changing the wavelength or greater. The spectroscopic controller starts the wavelength change driving at the start of the standby period.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: November 10, 2015
    Assignee: Seiko Epson Corporation
    Inventors: Danjun Zhao, Tetsuo Tatsuda, Shinichi Arazaki
  • Publication number: 20150185074
    Abstract: An optical module includes a wavelength variable interference filter that selects light of a predetermined wavelength from incident light, and can change the wavelength of emitted light; a global shutter imaging element that accumulates electric charges while being exposed to the emitted light, and outputs a detection signal in response to the accumulated electric charges; an imaging element controller for setting a photodetection period during which the electric charges are accumulated in the imaging element, and a standby period during which the electric charges accumulated in the imaging elements are reset; and a spectroscopic controller for controlling the wavelength change driving of the emitted light. The imaging element controller sets the duration of the standby period to a minimum drive time for changing the wavelength or greater. The spectroscopic controller starts the wavelength change driving at the start of the standby period.
    Type: Application
    Filed: December 23, 2014
    Publication date: July 2, 2015
    Inventors: Danjun ZHAO, Tetsuo TATSUDA, Shinichi ARAZAKI
  • Publication number: 20150185080
    Abstract: A spectrometry apparatus includes a wavelength variable interference filter emitting light of various predetermined wavelengths; a roll shutter imaging element having pixels accumulating electric charges when exposed to light, and forming one frame by photodetection for each pixel block including pixels with a predetermined time delay for each pixel block, in which the imaging element accumulates electric charges in a photodetection period, and outputs a detection signal in response to the accumulated electric charges in a non-photodetection period; and a spectroscopic controller controlling the wavelength change driving of the emitted light of the wavelength variable interference filter. For the one frame, the spectroscopic controller starts the wavelength change driving at an end timing of the photodetection period of a final pixel block for which the photodetection process is performed at the end.
    Type: Application
    Filed: December 23, 2014
    Publication date: July 2, 2015
    Inventors: Danjun ZHAO, Tetsuo TATSUDA, Shinichi ARAZAKI