Patents by Inventor Toyoharu Oohata

Toyoharu Oohata 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: 20190181608
    Abstract: In a semiconductor laser according to an embodiment of the present disclosure, a ridge part has a structure in which a plurality of gain regions and a plurality of Q-switch regions are each disposed alternately with each of separation regions being interposed therebetween in an extending direction of the ridge part. The separation regions each have a separation groove that separates from each other, by a space, the gain region and the Q-switch region adjacent to each other. The separation groove has a bottom surface at a position, in a second semiconductor layer, higher than a part corresponding to a foot of each of both sides of the ridge part. The semiconductor laser includes an electrode provided over the bottom surface of each separation groove with an insulating layer being interposed therebetween.
    Type: Application
    Filed: June 22, 2017
    Publication date: June 13, 2019
    Inventors: TOMOKI ONO, MIKIO TAKIGUCHI, TOYOHARU OOHATA, TAKAHIRO KOYAMA
  • Publication number: 20190173262
    Abstract: In a semiconductor laser according to an embodiment of the present disclosure, a ridge part has a structure in which a plurality of gain regions and a plurality of Q-switch regions are each disposed alternately with each of separation regions being interposed therebetween in an extending direction of the ridge part. The separation regions each have a separation groove that separates from each other, by a space, the gain region and the Q-switch region adjacent to each other. The separation groove has a bottom surface at a position, in a second semiconductor layer, higher than a part corresponding to a foot of each of both sides of the ridge part.
    Type: Application
    Filed: July 12, 2017
    Publication date: June 6, 2019
    Inventors: TOMOKI ONO, TOYOHARU OOHATA, TAKAHIRO KOYAMA, MIKIO TAKIGUCHI, MASAYUKI TANAKA
  • Publication number: 20190154815
    Abstract: Disclosed is a distance measurement device including a control section. The control section executes control so that an operating voltage for operating a light-receiving section is applied to the light-receiving section at a second time point. The second time point is later than a first time point by a predetermined time. The first time point is a time point at which a light-emitting section operates.
    Type: Application
    Filed: April 10, 2017
    Publication date: May 23, 2019
    Applicant: Sony Corporation
    Inventor: Toyoharu OOHATA
  • Publication number: 20190129032
    Abstract: A distance measurement apparatus including at least one measurement unit, in which the measurement unit includes: a voltage level converter that applies an arbitrary bias to a voltage obtained on the basis of an output from a light receiver to offset a level of the voltage; an amplifier that amplifies a voltage output from the voltage level converter; and a measurement section that measures a timing at which an output from the amplifier reaches a predetermined threshold.
    Type: Application
    Filed: January 31, 2017
    Publication date: May 2, 2019
    Inventors: TAKAHIRO KOYAMA, TOYOHARU OOHATA, TOMOKI ONO
  • Publication number: 20190033451
    Abstract: A ranging device provided with a light projecting unit for projecting a reference pulse set row including a main pulse and at least one sub pulse, a light receiving unit for receiving a reflected pulse set row obtained by reflection of the reference pulse set row by an object to be measured, an identifying unit for identifying the reflected pulse set row corresponding to the reference pulse set row, and a calculating unit for calculating a distance to the object to be measured on the basis of a delay time difference between the reference pulse set row and the reflected pulse set row corresponding to the reference pulse set row, in which the light projecting unit is configured to project a plurality of reference pulse set rows having different pulse intervals.
    Type: Application
    Filed: October 26, 2016
    Publication date: January 31, 2019
    Inventors: TAKAHIRO KOYAMA, TOYOHARU OOHATA, TOMOKI ONO
  • Publication number: 20180259629
    Abstract: Provided is a correction device including: a photon number counting unit that counts a photon number on the basis of an output signal output from a light receiving unit; a correction value acquiring unit that acquires a correction value corresponding to the photon number; and a correction unit that performs correction based on the correction value.
    Type: Application
    Filed: June 7, 2016
    Publication date: September 13, 2018
    Inventors: TOYOHARU OOHATA, TAKAHIRO KOYAMA, TOMOKI ONO
  • Publication number: 20180238999
    Abstract: A distance measurement apparatus includes at least one measurement unit. The measurement unit includes a first light reception section including a plurality of photon counting type light reception devices connected to each other, a first conversion section configured to convert current outputted from the first light reception section into a voltage, a first amplification section configured to output an amplification value obtained by amplifying the voltage outputted from the first conversion section and output, when the amplification value exceeds a given limit value, the limit value as the amplification value, and a first measurement section configured to measure a timing at which the output value from the first amplification section reaches a given threshold value.
    Type: Application
    Filed: June 6, 2016
    Publication date: August 23, 2018
    Applicant: Sony Corporation
    Inventors: TAKAHIRO KOYAMA, TOYOHARU OOHATA, TOMOKI ONO
  • Publication number: 20140235037
    Abstract: A crystal foundation having dislocations is used to obtain a crystal film of low dislocation density, a crystal substrate, and a semiconductor device. One side of a growth substrate (11) is provided with a crystal layer (13) with a buffer layer (12) in between. The crystal layer (13) has spaces (13a), (13b) in an end of each threading dislocation D1 elongating from below. The threading dislocation D1 is separated from the upper layer by the spaces (13a), (13b), so that each threading dislocation D1 is blocked from propagating to the upper layer. When the displacement of the threading dislocation D1 expressed by Burgers vector is preserved to develop another dislocation, the spaces (13a), (13b) vary the direction of its displacement. As a result, the upper layer above the spaces (13a), (13b) turns crystalline with a low dislocation density.
    Type: Application
    Filed: April 23, 2014
    Publication date: August 21, 2014
    Applicant: SONY CORPORATION
    Inventors: Etsuo Morita, Yousuke Murakami, Goshi Biwa, Hiroyuki Okuyama, Masato Doi, Toyoharu Oohata
  • Patent number: 8741451
    Abstract: A crystal foundation having dislocations is used to obtain a crystal film of low dislocation density, a crystal substrate, and a semiconductor device. One side of a growth substrate (11) is provided with a crystal layer (13) with a buffer layer (12) in between. The crystal layer (13) has spaces (13a), (13b) in an end of each threading dislocation D1 elongating from below. The threading dislocation D1 is separated from the upper layer by the spaces (13a), (13b), so that each threading dislocation D1 is blocked from propagating to the upper layer. When the displacement of the threading dislocation D1 expressed by Burgers vector is preserved to develop another dislocation, the spaces (13a), (13b) vary the direction of its displacement. As a result, the upper layer above the spaces (13a), (13b) turns crystalline with a low dislocation density.
    Type: Grant
    Filed: October 23, 2007
    Date of Patent: June 3, 2014
    Assignee: Sony Corporation
    Inventors: Etsuo Morita, Yousuke Murakami, Goshi Biwa, Hiroyuki Okuyama, Masato Doi, Toyoharu Oohata
  • Patent number: 8476826
    Abstract: A manufacturing method of a display device, includes: a first step of collectively transferring light-emitting elements arranged at every specified number of light-emitting elements formed and arranged on a first substrate to a transfer area set on a second substrate; and a second step of transferring light-emitting elements remaining on the first substrate to between the plural light-emitting elements mounted on the second substrate in at least one of a state where the first substrate is moved with respect to the transfer area on the second substrate and a state where the first substrate is rotated in a plane.
    Type: Grant
    Filed: March 25, 2010
    Date of Patent: July 2, 2013
    Assignee: Sony Corporation
    Inventors: Toyoharu Oohata, Katsuhiro Tomoda, Naoki Hirao, Masato Doi
  • Patent number: 8409886
    Abstract: A method of producing the image display unit, wherein the image display unit includes an array of a plurality of light emitting devices for displaying an image, and wherein the method of producing the image display unit employs, for example, a space expanding transfer, whereby a first transfer step includes transferring the devices arrayed on a first substrate to a temporary holding member such that the devices are spaced from each other with a pitch larger than a pitch of the devices arrayed on the first substrate, a second holding step includes holding the devices on the temporary holding member, and a third transfer step includes transferring the devices held on the temporary holding member onto a second board such that the devices are spaced from each other with a pitch larger than the pitch of the devices held on the temporary holding member.
    Type: Grant
    Filed: November 10, 2006
    Date of Patent: April 2, 2013
    Assignee: Sony Corporation
    Inventors: Toshiaki Iwafuchi, Toyoharu Oohata, Masato Doi
  • Patent number: 8361268
    Abstract: A method of transferring a device includes the steps of: arranging a first substrate, on which a device is provided with a release layer having a planar shape equal to or smaller than the device interposed therebetween, and a second substrate, on which an adhesive layer is provided, so as to be spaced from and opposite each other in a state where the device and the adhesive layer face each other; and irradiating a laser beam having an irradiation area larger than the base area of the release layer onto the entire surface of the release layer from the first substrate side so as to ablate the release layer, to separate the device from the first substrate, and to transfer the device on the second substrate.
    Type: Grant
    Filed: March 25, 2010
    Date of Patent: January 29, 2013
    Assignee: Sony Corporation
    Inventors: Takeshi Mizuno, Katsuhiro Tomoda, Toyoharu Oohata
  • Patent number: 8257538
    Abstract: A device transfer method and a display apparatus are provided. A device transfer method and a display apparatus are provided by or in which, in transferring devices arranged on a substrate onto another substrate, it is possible to easily strip the substrate after the transfer of the devices, to lower the possibility of damaging of the substrate, and to additionally transfer devices onto the same substrate after the transfer of the devices. A plurality of devices arranged on a temporary holding substrate are embedded into and held in a pressure sensitive adhesive layer formed on a transfer substrate, and the devices are stripped from the temporary holding substrate. Other devices are further additionally embedded into the pressure sensitive adhesive layer before hardening the pressure sensitive adhesive layer, whereby the devices can be arranged on a transfer substrate having a large area.
    Type: Grant
    Filed: August 24, 2006
    Date of Patent: September 4, 2012
    Assignee: Sony Corporation
    Inventors: Masato Doi, Katsuhiro Tomoda, Toshihiko Watanabe, Toyoharu Oohata
  • Patent number: 8101432
    Abstract: A method of repairing a defective one of devices mounted on substrate is provided. Devices are arrayed on a substrate and electrically connected to wiring lines connected to a drive circuit, to be thus mounted on the substrate. The devices mounted on the substrate are then subjected to an emission test. If a defective device is detected in this test, a repair device is mounted at a position corresponding to a position of the defective device. At this time, after wiring lines connected to the defective device are cut off, the repair device is electrically connected to portions of the wiring lines, the portions of the wiring lines being located at positions nearer to the drive circuit side than the cut-off positions of the wiring lines.
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: January 24, 2012
    Assignee: Sony Corporation
    Inventors: Toyoharu Oohata, Toshiaki Iwafuchi, Hisashi Ohba
  • Patent number: 7888690
    Abstract: An image display unit and a method of producing the image display unit, wherein the image display unit includes an array of a plurality of light emitting devices for displaying an image, and wherein the method of producing the image display unit employs, for example, a space expanding transfer, whereby a first transfer step includes transferring the devices arrayed on a first substrate to a temporary holding member such that the devices are spaced from each other with a pitch larger than a pitch of the devices arrayed on the first substrate, a second holding step includes holding the devices on the temporary holding member, and a third transfer step includes transferring the devices held on the temporary holding member onto a second board such that the devices are spaced from each other with a pitch larger than the pitch of the devices held on the temporary holding member.
    Type: Grant
    Filed: February 20, 2008
    Date of Patent: February 15, 2011
    Assignee: Sony Corporation
    Inventors: Toshiaki Iwafuchi, Toyoharu Oohata, Masato Doi
  • Patent number: 7880184
    Abstract: An image display unit and a method of producing the image display unit, wherein the image display unit includes an array of a plurality of light emitting devices for displaying an image, and wherein the method of producing the image display unit employs, for example, a space expanding transfer, whereby a first transfer step includes transferring the devices arrayed on a first substrate to a temporary holding member such that the devices are spaced from each other with a pitch larger than a pitch of the devices arrayed on the first substrate, a second holding step includes holding the devices on the temporary holding member, and a third transfer step includes transferring the devices held on the temporary holding member onto a second board such that the devices are spaced from each other with a pitch larger than the pitch of the devices held on the temporary holding member.
    Type: Grant
    Filed: April 30, 2003
    Date of Patent: February 1, 2011
    Assignee: Sony Corporation
    Inventors: Toshiaki Iwafuchi, Toyoharu Oohata, Masato Doi
  • Publication number: 20100258543
    Abstract: A method of transferring a device includes the steps of: arranging a first substrate, on which a device is provided with a release layer having a planar shape equal to or smaller than the device interposed therebetween, and a second substrate, on which an adhesive layer is provided, so as to be spaced from and opposite each other in a state where the device and the adhesive layer face each other; and irradiating a laser beam having an irradiation area larger than the base area of the release layer onto the entire surface of the release layer from the first substrate side so as to ablate the release layer, to separate the device from the first substrate, and to transfer the device on the second substrate.
    Type: Application
    Filed: March 25, 2010
    Publication date: October 14, 2010
    Applicant: SONY CORPORATION
    Inventors: Takeshi Mizuno, Katsuhiro Tomoda, Toyoharu Oohata
  • Publication number: 20100259164
    Abstract: A manufacturing method of a display device, includes: a first step of collectively transferring light-emitting elements arranged at every specified number of light-emitting elements formed and arranged on a first substrate to a transfer area set on a second substrate; and a second step of transferring light-emitting elements remaining on the first substrate to between the plural light-emitting elements mounted on the second substrate in at least one of a state where the first substrate is moved with respect to the transfer area on the second substrate and a state where the first substrate is rotated in a plane.
    Type: Application
    Filed: March 25, 2010
    Publication date: October 14, 2010
    Applicant: SONY CORPORATION
    Inventors: Toyoharu Oohata, Katsuhiro Tomoda, Naoki Hirao, Masato Doi
  • Patent number: 7744770
    Abstract: A device transfer method is provided. The device transfer method is disclosed by which, when a laser ablation technique is used to selectively exfoliate devices arranged on a substrate, the energy is transmitted efficiently to transfer the devices with a high degree of accuracy and at a high speed. A laser irradiation apparatus is used which includes a laser light source for generating a laser beam, a reflection section for reflecting the laser beam toward a required direction, and a control section for controlling whether or not the laser beam is to be irradiated in an interlocking relationship with the reflection section. The laser beam is selectively irradiated on a plurality of devices arranged on a transfer source substrate to cause laser ablation such that the selected devices are transferred to a transfer destination substrate by the selective laser ablation.
    Type: Grant
    Filed: June 22, 2005
    Date of Patent: June 29, 2010
    Assignee: Sony Corporation
    Inventors: Masato Doi, Toyoharu Oohata
  • Patent number: 7727331
    Abstract: A crystal foundation having dislocations is used to obtain a crystal film of low dislocation density, a crystal substrate, and a semiconductor device. One side of a growth substrate (11) is provided with a crystal layer (13) with a buffer layer (12) in between. The crystal layer (13) has spaces (13a), (13b) in an end of each threading dislocation D1 elongating from below. The threading dislocation D1 is separated from the upper layer by the spaces (13a), (13b), so that each threading dislocation D1 is blocked from propagating to the upper layer. When the displacement of the threading dislocation D1 expressed by Burgers vector is preserved to develop another dislocation, the spaces (13a), (13b) vary the direction of its displacement. As a result, the upper layer above the spaces (13a), (13b) turns crystalline with a low dislocation density.
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: June 1, 2010
    Assignee: Sony Corporation
    Inventors: Etsuo Morita, Yousuke Murakami, Goshi Biwa, Hiroyuki Okuyama, Masato Doi, Toyoharu Oohata