Patents by Inventor Yukinobu Tada
Yukinobu Tada 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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Publication number: 20230367121Abstract: An image display element includes an incident diffraction grating which diffracts incident light, and an outgoing diffraction grating from which light that has propagated through the light guide plate after being diffracted by the incident diffraction grating is emitted, the incident diffraction grating and the outgoing diffraction grating being each formed by a pattern of concave-convex formed on a surface of the light guide plate, and the image display element being obtained by joining the light guide plate and a cover glass protecting the pattern of concave-convex or two or more light guide plates with an air layer therebetween by a holding member, and being configured such that the light guide plate and the cover glass are formed by a plastic material, and the holding member has an air vent through which air in the air layer and outside air communicate.Type: ApplicationFiled: June 17, 2021Publication date: November 16, 2023Inventors: Daisuke TOMITA, Hiroyuki MINEMURA, Yumiko ANZAI, Hideo SUENAGA, Yukinobu TADA
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Patent number: 10656424Abstract: In a wearable information display terminal, information related to an object is displayed at a timing required by a user in an easily recognized form. Photography is performed in a field-of-vision direction, a first object is detected from a first image obtained by the photography, relevant information related to the first object is acquired from a network, and a second image related to the relevant information is generated. A second object different from the first object is detected from the first image, the second object is used as a display trigger, and the second image is displayed when the second object is close to the first object.Type: GrantFiled: July 11, 2019Date of Patent: May 19, 2020Assignee: MAXELL, LTD.Inventors: Susumu Yoshida, Satoshi Ouchi, Yukinobu Tada, Tadashi Kuwabara, Yoshiho Seo
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Publication number: 20190331927Abstract: In a wearable information display terminal, information related to an object is displayed at a timing required by a user in an easily recognized form. Photography is performed in a field-of-vision direction, a first object is detected from a first image obtained by the photography, relevant information related to the first object is acquired from a network, and a second image related to the relevant information is generated. A second object different from the first object is detected from the first image, the second object is used as a display trigger, and the second image is displayed when the second object is close to the first object.Type: ApplicationFiled: July 11, 2019Publication date: October 31, 2019Inventors: Susumu YOSHIDA, Satoshi OUCHI, Yukinobu TADA, Tadashi KUWABARA, Yoshiho SEO
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Patent number: 10386637Abstract: In a wearable information display terminal, information related to an object is displayed at a timing required by a user in an easily recognized form. Photography is performed in a field-of-vision direction, a first object is detected from a first image obtained by the photography, relevant information related to the first object is acquired from a network, and a second image related to the relevant information is generated. A second object different from the first object is detected from the first image, the second object is used as a display trigger, and the second image is displayed when the second object is close to the first object.Type: GrantFiled: January 15, 2014Date of Patent: August 20, 2019Assignee: MAXELL, LTD.Inventors: Susumu Yoshida, Satoshi Ouchi, Yukinobu Tada, Tadashi Kuwabara, Yoshiho Seo
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Publication number: 20160320622Abstract: In a wearable information display terminal, information related to an object is displayed at a timing required by a user in an easily recognized form. Photography is performed in a field-of-vision direction, a first object is detected from a first image obtained by the photography, relevant information related to the first object is acquired from a network, and a second image related to the relevant information is generated. A second object different from the first object is detected from the first image, the second object is used as a display trigger, and the second image is displayed when the second object is close to the first object.Type: ApplicationFiled: January 15, 2014Publication date: November 3, 2016Inventors: Susumu YOSHIDA, Satoshi OUCHI, Yukinobu TADA, Tadashi KUWABARA, Yoshiho SEO
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Patent number: 8284644Abstract: A focus jump technique enables focus control on recording layers of a disc in such a manner that its effect is not absorbed by disturbance or a variation in the movement speed of an objective lens. The technique involves monitoring level of a focus error signal and rejecting noise from the error signal. A speed sensor detects movement speed of an objective lens; and a speed control circuit generates a voltage for controlling the objective lens, based on the detected movement speed. Movement speed of the objective lens is detected during focus jump, a corresponding lens drive signal is generated, and an end position is determined from behavior of the error signal immediately before the end of the jump. A focus control is pulled, from a focus point corresponding to one recording layer, into a focus point corresponding to another recording layer forcibly in a stable manner.Type: GrantFiled: November 3, 2010Date of Patent: October 9, 2012Assignee: Hitachi, Ltd.Inventors: Yukinobu Tada, Yoshinori Ishikawa
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Publication number: 20110044144Abstract: A focus jump technique enables focus control on recording layers of a disc in such a manner that its effect is not absorbed by disturbance or a variation in the movement speed of an objective lens. The technique involves monitoring level of a focus error signal and rejecting noise from the error signal. A speed sensor detects movement speed of an objective lens; and a speed control circuit generates a voltage for controlling the objective lens, based on the detected movement speed. Movement speed of the objective lens is detected during focus jump, a corresponding lens drive signal is generated, and an end position is determined from behavior of the error signal immediately before the end of the jump. A focus control is pulled, from a focus point corresponding to one recording layer, into a focus point corresponding to another recording layer forcibly in a stable manner.Type: ApplicationFiled: November 3, 2010Publication date: February 24, 2011Applicant: HITACHI, LTDInventors: Yukinobu Tada, Yoshinori Ishikawa
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Patent number: 7876654Abstract: An IC provided in an optical disk device having an objective lens and a pickup for a disk. The IC has a circuit for holding a signal which drives the objective lens in a focus or tracking direction and for detecting the moving direction of the objective lens, and a circuit for generating a signal which applies an acceleration to the objective lens. When the objective lens passes through a defect on the disk, on the basis of the detected moving direction of the objective lens, the IC applies the acceleration alternately in plus and minus directions to the objective lens to make the objective lens stationary. As a result, after the defect passage, the objective lens can be quickly returned to a focused point or an on-track position and reproducing/recording operation can be resumed.Type: GrantFiled: December 20, 2006Date of Patent: January 25, 2011Assignee: Renesas Technology Corp.Inventor: Yukinobu Tada
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Patent number: 7848190Abstract: A focus jump technique enables focus control on recording layers of a disc in such a manner that its effect is not absorbed by disturbance or a variation in the movement speed of an objective lens. The technique involves monitoring level of a focus error signal and rejecting noise from the error signal. A speed sensor detects movement speed of an objective lens; and a speed control circuit generates a voltage for controlling the objective lens, based on the detected movement speed. Movement speed of the objective lens is detected during focus jump, a corresponding lens drive signal is generated, and an end position is determined from behavior of the error signal immediately before the end of the jump. A focus control is pulled, from a focus point corresponding to one recording layer, into a focus point corresponding to another recording layer forcibly in a stable manner.Type: GrantFiled: December 1, 2008Date of Patent: December 7, 2010Assignee: Hitachi, Ltd.Inventors: Yukinobu Tada, Yoshinori Ishikawa
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Publication number: 20090310458Abstract: The present invention aims to, when recording pulse information are transmitted to a laser driver lying over a pickup through an optical disk, reduce the number of transmission paths or lines from a conventional transmission method and avoid degradation of recording performance due to transmission path characteristics upon fastening of a recording speed thereby to provide stable recording performance at high-speed recording. The invention of the present application reduces the number of transmission signals by encoding multi-level laser pulse information transmitted by the laser driver. Further, gray codes are used for encoding to reduce constraints of skew between bits. Furthermore, encoding is executed using each state transition and the state transitions are switched according to each recording mark and space, thereby reducing the occurrence of a short pulse on each transmission path.Type: ApplicationFiled: May 14, 2009Publication date: December 17, 2009Inventors: Koichiro Nishimura, Masato Soma, Toshifumi Takeuchi, Manabu Katsuki, Yukinobu Tada
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Publication number: 20090086592Abstract: A focus jump technique enables focus control on recording layers of a disc in such a manner that its effect is not absorbed by disturbance or a variation in the movement speed of an objective lens. The technique involves monitoring level of a focus error signal and rejecting noise from the error signal. A speed sensor detects movement speed of an objective lens; and a speed control circuit generates a voltage for controlling the objective lens, based on the detected movement speed. Movement speed of the objective lens is detected during focus jump, a corresponding lens drive signal is generated, and an end position is determined from behavior of the error signal immediately before the end of the jump. A focus control is pulled, from a focus point corresponding to one recording layer, into a focus point corresponding to another recording layer forcibly in a stable manner.Type: ApplicationFiled: December 1, 2008Publication date: April 2, 2009Applicant: HITACHI, LTD.Inventors: Yukinobu TADA, Yoshinori Ishikawa
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Patent number: 7471597Abstract: A focus jump technique enables focus control on recording layers of a disc in such a manner that its effect is not absorbed by disturbance or a variation in the movement speed of an objective lens. The technique involves monitoring level of a focus error signal and rejecting noise from the error signal. A speed sensor detects movement speed of an objective lens; and a speed control circuit generates a voltage for controlling the objective lens, based on the detected movement speed. Movement speed of the objective lens is detected during focus jump, a corresponding lens drive signal is generated, and an end position is determined from behavior of the error signal immediately before the end of the jump. A focus control is pulled, from a focus point corresponding to one recording layer, into a focus point corresponding to another recording layer forcibly in a stable manner.Type: GrantFiled: March 8, 2007Date of Patent: December 30, 2008Assignee: Hitachi, Ltd.Inventors: Yukinobu Tada, Yoshinori Ishikawa
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Publication number: 20070159950Abstract: A focus jump technique enables focus control on recording layers of a disc in such a manner that its effect is not absorbed by disturbance or a variation in the movement speed of an objective lens. The technique involves monitoring level of a focus error signal and rejecting noise from the error signal. A speed sensor detects movement speed of an objective lens; and a speed control circuit generates a voltage for controlling the objective lens, based on the detected movement speed. Movement speed of the objective lens is detected during focus jump, a corresponding lens drive signal is generated, and an end position is determined from behavior of the error signal immediately before the end of the jump. A focus control is pulled, from a focus point corresponding to one recording layer, into a focus point corresponding to another recording layer forcibly in a stable manner.Type: ApplicationFiled: March 8, 2007Publication date: July 12, 2007Applicant: HITACHI, LTD.Inventors: Yukinobu Tada, Yoshinori Ishikawa
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Publication number: 20070160347Abstract: A video recording/reproducing apparatus capable of discriminating commercial message portions even when a broadcasting mode is the same. A magnetic head records television broadcasting signals to a magnetic tape and reproduces the television broadcasting signals from this magnetic tape. When the television broadcasting signals are reduced by recording/reproducing apparatus, an audio-free portion detector detects audio-free portions from audio signals in the television broadcasting signals. Commercial message (CM) portion detector detects the commercial message portions in the television broadcasting signals by the time intervals among a plurality of audio-free portions detected by the audio-free portion detector, and a CM information memory circuit stores the information of the recording positions of the commercial message portions detected by this commercial message portion detector to the magnetic tape.Type: ApplicationFiled: March 22, 2007Publication date: July 12, 2007Applicant: HITACHI, LTD.Inventors: Yukinobu TADA, Hideo NISHIJIMA, Kaneyuki OKAMOTO, Masayuki KIJIMA
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Publication number: 20070147206Abstract: An IC provided in an optical disk device having an objective lens and a pickup for a disk. The IC has a circuit for holding a signal which drives the objective lens in a focus or tracking direction and for detecting the moving direction of the objective lens, and a circuit for generating a signal which applies an acceleration to the objective lens. When the objective lens passes through a defect on the disk, on the basis of the detected moving direction of the objective lens, the IC applies the acceleration alternately in plus and minus directions to the objective lens to make the objective lens stationary. As a result, after the defect passage, the objective lens can be quickly returned to a focused point or an on-track position and reproducing/recording operation can be resumed.Type: ApplicationFiled: December 20, 2006Publication date: June 28, 2007Inventor: Yukinobu Tada
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Patent number: 7212472Abstract: A focus jump technique enables focus control on recording layers of a disc in such a manner that its effect is not absorbed by disturbance or a variation in the movement speed of an objective lens. The technique involves monitoring level of a focus error signal and rejecting noise from the error signal. A speed sensor detects movement speed of an objective lens; and a speed control circuit generates a voltage for controlling the objective lens, based on the detected movement speed. Movement speed of the objective lens is detected during focus jump, a corresponding lens drive signal is generated, and an end position is determined from behavior of the error signal immediately before the end of the jump. A focus control is pulled, from a focus point corresponding to one recording layer, into a focus point corresponding to another recording layer forcibly in a stable manner.Type: GrantFiled: November 16, 2004Date of Patent: May 1, 2007Assignee: Hitachi, Ltd.Inventors: Yukinobu Tada, Yoshinori Ishikawa
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Patent number: 7209631Abstract: A video recording/reproducing apparatus capable of discriminating commercial message portions even when a broadcasting mode is the same. A magnetic head records television broadcasting signals to a magnetic tape and reproduces the television broadcasting signals from this magnetic tape. When the television broadcasting signals are reduced by recording/reproducing apparatus, an audio-free portion detector detects audio-free portions from audio signals in the television broadcasting signals. Commercial message (CM) portion detector detects the commercial message portions in the television broadcasting signals by the time intervals among a plurality of audio-free portions detected by the audio-free portion detector, and a CM information memory circuit stores the information of the recording positions of the commercial message portions detected by this commercial message portion detector to the magnetic tape.Type: GrantFiled: May 22, 2001Date of Patent: April 24, 2007Assignee: Hitachi, Ltd.Inventors: Yukinobu Tada, Hideo Nishijima, Kaneyuki Okamoto, Masayuki Kijima
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Patent number: 7200075Abstract: A focus jump technique enables focus control on recording layers of a disc in such a manner that its effect is not absorbed by disturbance or a variation in the movement speed of an objective lens. The technique involves monitoring level of a focus error signal and rejecting noise from the error signal. A speed sensor detects movement speed of an objective lens; and a speed control circuit generates a voltage for controlling the objective lens, based on the detected movement speed. Movement speed of the objective lens is detected during focus jump, a corresponding lens drive signal is generated, and an end position is determined from behavior of the error signal immediately before the end of the jump. A focus control is pulled, from a focus point corresponding to one recording layer, into a focus point corresponding to another recording layer forcibly in a stable manner.Type: GrantFiled: November 16, 2004Date of Patent: April 3, 2007Assignee: Hitachi, Ltd.Inventors: Yukinobu Tada, Yoshinori Ishikawa
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Patent number: 7151722Abstract: A focus jump technique enables focus control on recording layers of a disc in such a manner that its effect is not absorbed by disturbance or a variation in the movement speed of an objective lens. The technique involves monitoring level of a focus error signal and rejecting noise from the error signal. A speed sensor detects movement speed of an objective lens; and a speed control circuit generates a voltage for controlling the objective lens, based on the detected movement speed. Movement speed of the objective lens is detected during focus jump, a corresponding lens drive signal is generated, and an end position is determined from behavior of the error signal immediately before the end of the jump. A focus control is pulled, from a focus point corresponding to one recording layer, into a focus point corresponding to another recording layer forcibly in a stable manner.Type: GrantFiled: November 16, 2004Date of Patent: December 19, 2006Assignee: Hitachi, Ltd.Inventors: Yukinobu Tada, Yoshinori Ishikawa
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Patent number: 7111133Abstract: In a control apparatus for operating with program data, it is possible to alter the operation of a control circuit by rewriting the data of the program memory built in an LSI, with ease and at a low cost independently of the operation of the control circuit. For that purpose, the control apparatus includes a ROM, a SRAM, a means for writing data in the SRAM, a selection means for selecting the output from the ROM or the SRAM in accordance with the addresses supplied to the ROM and the SRAM, and a control means for outputting the addresses to the ROM and the SRAM and operating with the output from the selection means as program data.Type: GrantFiled: November 25, 2003Date of Patent: September 19, 2006Assignee: Hitachi, Ltd.Inventors: Yoshinori Ishikawa, Yukinobu Tada, Masato Soma, Dan Aoki