Patents Assigned to Hitachi Media Electronics Co., Ltd.
  • Patent number: 9076494
    Abstract: An optical pickup, including a housing, and an optical element mounted on the housing, wherein the optical element is fixed onto wall surfaces of the housing via adhesive agents on both sides of a certain single surface of the optical element, the optical pickup, further including a protrusion portion on the other side of a surface with the optical element positioned therebetween, the surface being orthogonal to the wall surfaces of the housing, the protrusion portion protruding from the housing, the front end of the protrusion portion protruding than the adhesive agents in a direction away from the wall surfaces.
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: July 7, 2015
    Assignee: HITACHI MEDIA ELECTRONICS CO., LTD.
    Inventors: Tatsuya Yamasaki, Kenji Kiya, Katsuhiko Kimura
  • Publication number: 20150062589
    Abstract: A small and inexpensive optical measurement apparatus is provided in which noise due to optical interference such as inter-layer crosstalk or speckle is suppressed.
    Type: Application
    Filed: February 25, 2014
    Publication date: March 5, 2015
    Applicant: Hitachi Media Electronics Co., Ltd.
    Inventors: Kentaro OSAWA, Daisuke TOMITA, Masaki MUKO
  • Publication number: 20150034723
    Abstract: A motion picture is captured while a focal position is changed in a predetermined reproduction layer of a recording medium, the resolutions of a plurality of still images acquired by the capturing of the motion picture are checked using check patterns, which are recorded at a predetermined frequency, of the medium, it is determined whether the still images are usable for the reproduction of data, and a plurality of the still images determined to be usable are composed.
    Type: Application
    Filed: February 27, 2014
    Publication date: February 5, 2015
    Applicant: Hitachi Media Electronics Co., Ltd.
    Inventors: Takao WATANABE, Daisuke TOMITA, Koichi WATANABE, Ryo IMAI
  • Publication number: 20150022568
    Abstract: The white balance for a high brightness region and a low brightness region is improved in an image display device using MEMS and a laser light source. An image processing unit of the device superposes a signal based on a first measured value of a light quantity at a first temperature on a picture signal, during its blanking period, which is supplied to the laser light source, and superposes a high frequency signal on the picture signal during its effective scanning period. An amplification factor of the light source drive unit is changed so that a second measured value at a second temperature comes close to the first measured value at the first temperature as a target value based on the second measured value at which the light quantity of light generated at the laser light source is measured at the second temperature different from the first temperature on the signal based on the first measured value.
    Type: Application
    Filed: March 6, 2014
    Publication date: January 22, 2015
    Applicant: Hitachi Media Electronics Co., Ltd.
    Inventors: Yasunori ISHII, Fumio HARUNA
  • Patent number: 8937855
    Abstract: A holographic optical pickup device includes an optical axis split element for splitting a reference beam into two light beams in different propagation directions having polarized states substantially orthogonal to each other, angular variable elements for changing incident angle of the reference beam for irradiating an optical information recording medium, an image sensor for detecting a diffracted beam generated from a recorded region upon irradiation of the optical information recording medium with the reference beam to form a reproduction signal, and photodetectors for detecting the diffracted beam generated from the recorded region upon irradiation of the optical information recording medium with the reference beam. An angular error signal is generated for controlling the angular variable element using signals detected by the photodetectors.
    Type: Grant
    Filed: June 19, 2013
    Date of Patent: January 20, 2015
    Assignee: Hitachi Media Electronics Co., Ltd.
    Inventors: Kazuyoshi Yamazaki, Ken-ichi Shimada
  • Patent number: 8902723
    Abstract: A fixing structure of an optical component is composed of a device chassis; a holder holding an optical component; first and second plate parts for joint to the device chassis and a connecting part of both the plate parts are formed in the holder; a plurality of joint holes are formed in the second plate part; a U-groove into which the connecting part of the holder is fitted and a plurality of through-holes are formed in the device chassis; and an adhesive that is extended in a circular columnar shape and is made by inserting the holder into the U-groove of the device chassis, and applying a UV-curing adhesive in such a manner that the UV-curing adhesive is bonded to the first plate part of the holder and is continuous to the inside of the joint hole via the inside of the through-hole, and radiating UV light along the through-hole.
    Type: Grant
    Filed: November 21, 2013
    Date of Patent: December 2, 2014
    Assignee: Hitachi Media Electronics Co., Ltd.
    Inventors: Hiroaki Furuichi, Yasuo Amano, Teppei Tanaka, Hitoshi Sugawara, Masahiko Kamesawa
  • Publication number: 20140320826
    Abstract: In an optical unit of a projective display device which projects light source light reflected by a DMD, one prism of TIR prisms has a first boundary surface which is arranged in parallel to an emission surface of the light source light of other prism at a predetermined distance and on which the light source light from other prism is incident and a second boundary surface which is provided to face the DMD and emits the light source light illuminating the DMD and on which reflected light from the DMD is incident. When a swinging angle of minute mirrors of the DMD is set as ±?, a refractive index of the prisms is set as n, an angle formed by the first boundary surface and the second boundary surface is set as ?, and an emission angle of the light source light with respect to the DMD in the second boundary surface is set as ?, the swinging angle ?, the refractive index n, the angle ?, and the angle ? satisfy a predetermined relation.
    Type: Application
    Filed: February 27, 2014
    Publication date: October 30, 2014
    Applicant: HITACHI MEDIA ELECTRONICS CO., LTD.
    Inventors: Mitsuru NAGASAWA, Kunikazu ONISHI, Satoshi OUCHI, Toshiteru NAKAMURA
  • Patent number: 8873173
    Abstract: In the object lens drive unit including a lens holder with an object lens attached to, a plurality of driving coils attached to the lens holder, connection substrates attached to both sides of the lens holder, and a plurality of suspension wires with end parts thereof connected to the connection substrates for operatively supporting the lens holder, a plurality of sets of wire connection electrodes for connecting the suspension wires and coil connection electrodes electrically connected to the wire connection electrodes for connecting terminal wires of the coils are arranged in line in an optic axis direction of the object lens and the wire connection electrodes and the coil connection electrodes are formed in a symmetric shape to a central axis parallel to the optic axis direction on the connection substrates.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: October 28, 2014
    Assignee: Hitachi Media Electronics Co., Ltd.
    Inventors: Atsushi Kazama, Katsuhiko Kimura, Takahiro Yamaguchi, Souichirou Yamada
  • Publication number: 20140285541
    Abstract: A light irradiation device to display an image by light irradiation prevents easy perception of distortion occurring in the displayed image due to vibration of the device or movement of viewpoint. A random number is generated, and the refresh rate of the displayed image is distributed at random in correspondence with the random number. The light emission intensity is changed in correspondence with the refresh rate. When the number of lines is changed, the input video signal is subjected to scaling and a display is produced. The refresh rate is changed in correspondence with the frequency of the vibration detected with the vibration monitor.
    Type: Application
    Filed: February 20, 2014
    Publication date: September 25, 2014
    Applicant: Hitachi Media Electronics Co., Ltd.
    Inventors: Yoshiho SEO, Satoshi OUCHI, Hiromi KUSAKA
  • Publication number: 20140285536
    Abstract: A change in the white balance caused due to the temperature is reduced in an image display device using MEMS and a laser light source. An image processing unit of the device superposes a signal based on a first measured value of a light quantity at a first temperature on a image signal to be supplied to the laser light source. An amplification factor of the light source drive unit is changed so that a second measured value at a second temperature comes close to the first measured value at the first temperature as a target value based on the second measured value at which the light quantity of light generated at the laser light source is measured at the second temperature different from the first temperature on the signal based on the first measured value.
    Type: Application
    Filed: November 22, 2013
    Publication date: September 25, 2014
    Applicant: HITACHI MEDIA ELECTRONICS CO., LTD.
    Inventors: Fumio HARUNA, Tsutomu KUROIWA, Yuya OGI
  • Publication number: 20140268358
    Abstract: A virtual image display device includes: an image projection device that projects an image light; a diverging element on which the image light emitted from the image projection device is incident, spreading the image light out over a range of a predetermined angle; and a light branching element that reflects the image light emitted from the diverging element, while transmitting the incident light from the surface other than the reflecting surface. The image light from the image projection device is formed into an image on the diverging element. A virtual image of the image formed on the diverging element is generated on an extension line in the opposite direction to the emission direction of the image light reflected from the light branching element. Further, an optical axis converting element is provided to convert the optical axis of the image light emitted from the image projection device, into a predetermined direction.
    Type: Application
    Filed: February 24, 2014
    Publication date: September 18, 2014
    Applicant: Hitachi Media Electronics Co., Ltd.
    Inventors: Hiromi KUSAKA, Satoshi OUCHI, Yoshiho SEO
  • Publication number: 20140253527
    Abstract: A laser projection display device includes: a laser light source drive unit; an attribute amount detection unit for detecting the attribute amount of a picture signal; a light sensor for measuring the light amounts of the laser light sources; and a temperature sensor for measuring the temperatures of the laser light sources. The laser projection display device is configured so that the current vs. light amount output characteristics of the laser light sources with a threshold current and current gain as a parameter are corrected in accordance with the load amount of the picture signal per frame if the change of the attribute amount exceeds a predefined amount; the light sources are driven at a predefined timing of the vertical blanking interval; controls the threshold currents and current gains in accordance with the light amounts; and the threshold currents and current gains are corrected on the basis of the measured temperatures.
    Type: Application
    Filed: January 15, 2014
    Publication date: September 11, 2014
    Applicant: Hitachi Media Electronics Co., Ltd.
    Inventors: Yuya OGI, Yoshiho SEO, Fumio HARUNA, Toshio UEDA, Tomoyuki NONAKA
  • Patent number: 8830810
    Abstract: A holographic optical pickup device includes an image sensor that detects a diffracted beam generated from the region to be reproduced when irradiating an optical information recording medium with a reference beam, and sets the detected diffraction beam as a reproduction signal, and a photodetector that is different from the image sensor, which detects the diffracted beam generated from a recorded region in the recording medium when irradiating the recording medium with the reference beam. A light receiver of the photodetector is divided into a plurality of light receiving planes so as to generate the position error signal indicating the positional shifting of the region to be recorded/reproduced of the recording medium with respect to the objective lens from a differential signal of a plurality of signals derived from the respective light receiving planes.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: September 9, 2014
    Assignee: Hitachi Media Electronics Co., Ltd.
    Inventor: Kazuyoshi Yamazaki
  • Publication number: 20140231965
    Abstract: Provided are a method for forming a microfine structure and a microfine structure forming body prepared by the method. The method allows a remaining film part to be formed thinner and more uniform on a substrate than the conventional techniques. The method comprises the steps of: forming an oxide layer on a metallic thin film; a photocurable resin layer via first and second adhesive layers over the oxide layer; and transferring a microfine structure formed on a mold by pressing the mold onto the photocurable resin layer. The first adhesive layer includes a compound having at least two hydrolysable functional groups, and the second adhesive layer includes a compound having at least a hydrolysable functional group and a reactive functional group.
    Type: Application
    Filed: November 20, 2013
    Publication date: August 21, 2014
    Applicant: Hitachi Media Electronics Co., Ltd.
    Inventors: Ryuta WASHIYA, Masahiko OGINO, Shiro NAGASHIMA, Akio YABE, Masaki SUGITA, Akihiro MIYAUCHI
  • Publication number: 20140234596
    Abstract: An adhesive structure of an optical component includes a horizontal surface and a vertical surface. In a structure in which an optical component is adhered to a chassis having the horizontal surface and the vertical surface, an adhesive force per unit area of the vertical surface is higher than that per unit area of the horizontal surface.
    Type: Application
    Filed: November 8, 2013
    Publication date: August 21, 2014
    Applicant: Hitachi Media Electronics Co., Ltd.
    Inventors: Masayuki OKAMURA, Hiroaki FURUICHI, Teppei TANAKA, Masahiko KAMESAWA, Hitoshi SUGAWARA
  • Publication number: 20140226452
    Abstract: A fixing structure of an optical component is composed of a device chassis; a holder holding an optical component; first and second plate parts for joint to the device chassis and a connecting part of both the plate parts are formed in the holder; a plurality of joint holes are formed in the second plate part; a U-groove into which the connecting part of the holder is fitted and a plurality of through-holes are formed in the device chassis; and an adhesive that is extended in a circular columnar shape and is made by inserting the holder into the U-groove of the device chassis, and applying a UV-curing adhesive in such a manner that the UV-curing adhesive is bonded to the first plate part of the holder and is continuous to the inside of the joint hole via the inside of the through-hole, and radiating UV light along the through-hole.
    Type: Application
    Filed: November 21, 2013
    Publication date: August 14, 2014
    Applicant: Hitachi Media Electronics Co., Ltd.
    Inventors: Hiroaki FURUICHI, Yasuo AMANO, Teppei TANAKA, Hitoshi SUGAWARA, Masahiko KAMESAWA
  • Patent number: 8804474
    Abstract: An optical information recording/reproducing apparatus, to apply holograms of an angle multiplex recording method therein includes: a light source to emit a light beam; a divider unit to divide the light beam into a signal beam and a reference light; an angle variable unit to change an angle of the reference light incident upon an optical information recording medium; a spatial light modulator unit to add information to the signal beam; an objective lens to irradiate the signal beam on the medium; an image pickup unit to detect a diffracted light generating from a recording region, when the reference light is irradiated on the medium; and an optical element to shape a form of light flux of the reference light, so that a light flux diameter of the reference light in a multiplex direction becomes larger than the light flux diameter of the reference light in a pitch direction.
    Type: Grant
    Filed: August 6, 2013
    Date of Patent: August 12, 2014
    Assignee: Hitachi Media Electronics Co., Ltd.
    Inventors: Mayumi Nagayoshi, Kenichi Shimada, Kazuyoshi Yamazaki, Taku Hoshizawa, Makoto Hosaka
  • Publication number: 20140204388
    Abstract: Provided is a compact, low-cost optical measuring apparatus capable of acquiring an image of a target to be measured without moving a mirror or using a wavelength-scanning light source or beam splitter. A laser beam emitted from a light source is split into first and second beams, and the first beam is focused as a signal beam onto the target by a lens for irradiation purposes, while the second beam is reflected as a reference beam by a mirror without irradiating the target. Then, a signal beam reflected by or scattered by the target is multiplexed with the reference beam and then enters interference optics, whereby three or more interference beams with different phases are generated and detected by photodetectors. Then, the detection signals are operated by a signal processing unit. During the measurement, the focus position of the first beam is moved at least in the optical axis direction.
    Type: Application
    Filed: November 8, 2013
    Publication date: July 24, 2014
    Applicant: HITACHI MEDIA ELECTRONICS CO., LTD.
    Inventors: Kentaro OSAWA, Koichi WATANABE, Daisuke TOMITA
  • Publication number: 20140204389
    Abstract: A luminous flux including laser light of different wavelengths outgoing from a light source unit is split into two luminous fluxes, the first luminous flux is focused on a sample with an objective lens, and the second luminous flux functions as reference light without radiating it onto the sample. Signal light reflected from the sample and the reference light are multiplexed by a polarized beam splitter and are made to interfere on four photodetectors out of phase in a photodetection unit. A signal processing unit acquires the optical axis distribution of an object of examination in the sample by operating using the outputs of the plural photodetectors for input every wavelength, acquiring a detection signal and calculating the ratio of detection signals of different wavelengths every position in the sample.
    Type: Application
    Filed: November 19, 2013
    Publication date: July 24, 2014
    Applicant: HITACHI MEDIA ELECTRONICS CO., LTD.
    Inventors: Masaki MUKOH, Kentaro OSAWA, Tatsuro IDE
  • Publication number: 20140192093
    Abstract: A laser beam display device includes: a dimming setting input unit into which any one of the dimming values of plural dimming steps are input; a first dimming processing unit having plural dimming LUTs that store dimming amounts regarding the respective dimming steps with the corresponding gradation levels as indexes; a second dimming processing unit having one gain LUT that holds gains regarding the respective dimming steps and a multiplier that creates the indexes for the respective diming LUTs by multiplying a video signal by the gains; and a light source drive unit that drives a laser diode on the basis of reference results obtained by referring to the dimming LUTs of the first dimming processing unit. The luminance of the emission beam of the laser diode, which corresponds to the video signal, is dimmed in accordance with a dimming setting input from the dimming setting input unit.
    Type: Application
    Filed: December 18, 2013
    Publication date: July 10, 2014
    Applicant: HITACHI MEDIA ELECTRONICS CO., LTD.
    Inventors: Fumio HARUNA, Yuya OGI, Tomoki KOBORI, Yoshiho SEO, Masayuki HATORI, Toshio UEDA