Patents by Inventor Seiji Nakazawa
Seiji Nakazawa 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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Patent number: 9472094Abstract: A display device includes a display portion for displaying a video, a generator for generating a synchronization signal including a command signal synchronized with display of frame images of the video and a transmitter for transmitting the synchronization signal. The command signal including a predetermined member of pulse signals has a leading pulse signal for notifying a start of the command signal, a terminal pulse signal for notifying an end of the command signal and a control pulse signal for notifying a content of synchronization control synchronized with the display of the frame images.Type: GrantFiled: February 16, 2012Date of Patent: October 18, 2016Assignee: PANASONIC INTELLECTUAL PROPERTY MANGEMENT CO., LTD.Inventors: Kazuhiro Mihara, Hiroshi Mitani, Shuji Inoue, Masanobu Inoe, Katsuo Saigo, Seiji Nakazawa
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Patent number: 9201246Abstract: A controller for controlling an eyeglass device which performs an assistance operation for assisting in stereoscopically viewing a video includes: a first acquisition portion for acquiring first frequency information relating to a display frequency of frame images of the video; a second acquisition portion for acquiring second frequency information relating to an environmental factor which periodically varies in an environment where the video is viewed; and a generator for generating a reference signal to adapt the assistance operation of the eyeglass device to display of the frame image and periodic variation of the environmental factor on the basis of the first frequency information and the second frequency information.Type: GrantFiled: September 20, 2011Date of Patent: December 1, 2015Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Kazuhiro Mihara, Yoshio Umeda, Seiji Nakazawa
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Patent number: 9001119Abstract: The instant application describes display device for switching display mode between first display mode for displaying stereoscopic images with eyewear device which adjusts incident light amounts to the left and right eyes, and second display mode different from the first display mode. The display device includes signal generator which generates timing signals for notifying timings of increasing the incident light amount to the left and right eyes in the first and second display modes or stop signals for stopping the adjustment operation, as control signals for the adjustment operation; and transmitter which transmits the control signals to the eyewear device. During the first display mode, the transmitter transmits the timing signals for the first display mode. Switching operation from the first to second display mode causes the transmitter to transmit the stop signal and then the timing signal for the second display mode to the eyewear device.Type: GrantFiled: September 13, 2012Date of Patent: April 7, 2015Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Kazuhiro Mihara, Keisuke Suetsugi, Katsuo Saigo, Seiji Nakazawa
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Patent number: 8934001Abstract: An eyeglass device for assisting in viewing a video to be stereoscopically perceived includes an optical filter portion with left and right filters for adjusting light amount to be transmitted to left and right eyes, respectively and a controller for controlling adjustment operation of the light amount by the optical filter portion, wherein the controller switches a control mode of the optical filter portion between a first control mode of controlling the optical filter portion so that the adjustment operation becomes synchronized with display of a frame image of the video and a second control mode of controlling the optical filter so that that the adjustment operation becomes slower than a frame rate of the video to make a viewer perceive the adjustment operation which is asynchronous with the display of the frame image.Type: GrantFiled: September 23, 2011Date of Patent: January 13, 2015Assignee: Panasonic CorporationInventors: Shuji Inoue, Hiroshi Mitani, Kazuhiro Mihara, Masanobu Inoe, Katsuo Saigo, Seiji Nakazawa
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Patent number: 8643707Abstract: An image signal processing apparatus performs gradation control on respective pixels. Specifically, the image signal processing apparatus includes an image signal processing unit which controls light emission and non-light emission of respective subfields so as to provide a field having a level of brightness. Here, the field is a unit display period of the pixels and divided into the subfields which have different light emission periods and are arranged in a predetermined sequence. In the predetermined sequence, the subfields are arranged in a manner such that a subfield having the shortest light emission period among the subfields is in the first place, one of a subfield having the longest light emission period and a subfield having the second longest light emission period among the subfields is in the second place, and the other one is in the third place.Type: GrantFiled: September 3, 2010Date of Patent: February 4, 2014Assignee: Panasonic CorporationInventors: Keizo Matsumoto, Hiroshi Miyai, Katsuo Saigo, Masanobu Inoe, Seiji Nakazawa
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Patent number: 8599107Abstract: An image system includes: a display device configured to display an image; and an eyeglasses device for viewing the image displayed by the display device, wherein the display device includes: a display portion configured to display in time series the image to be viewed through the eyeglasses device; a signal generation portion configured to generate a synchronization signal for synchronizing timing of switching of frames of the image; and a transmission portion configured to transmit the synchronization signal, the eyeglasses device includes: an optical filter portion configured to adjust an amount of light of the image; a reception portion configured to receive the synchronization signal transmitted from the transmission portion; and a control portion configured to control action of the optical filter portion corresponding to the switching of the frames of the image, based on the synchronization signal, the signal generation portion further generates a parameter signal including action information for definiType: GrantFiled: August 28, 2009Date of Patent: December 3, 2013Assignee: Panasonic CorporationInventors: Kazuhiro Mihara, Hiroshi Miyai, Katsuo Saigo, Masafumi Shimotashiro, Seiji Nakazawa, Masayuki Kozuka, Yoshiho Gotoh
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Patent number: 8564648Abstract: An image signal processing apparatus outputs, alternately on a-per frame basis, a first image to be displayed to one of left and right eyes of a viewer and a second image to be displayed to the other eye, and transmits, to a pair of image viewer glasses, a synchronizing signal for controlling timing of opening and closing of optical filters so as to allow the viewer to see the output frames through corresponding eyes. Specifically, the apparatus includes: a persistence amount detecting unit which detects a persistence amount indicating an effect of a first frame in the first image on a second frame in the second image and immediately following the first frame; and an optical-filter adaptive control unit which generates the synchronizing signal indicating timing of opening and closing of the optical filter corresponding to the second frame. The timing is changed based on the persistence amount detected.Type: GrantFiled: September 3, 2010Date of Patent: October 22, 2013Assignee: Panasonic CorporationInventors: Keizo Matsumoto, Hiroshi Miyai, Katsuo Saigo, Masanobu Inoe, Seiji Nakazawa
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Patent number: 8363095Abstract: The present invention discloses a video system provided with a display device for displaying a video image including a first video image and a second video image and an eyeglass device for assisting a viewer in viewing the video image, wherein the display device includes: a display for displaying the first and second video images; a first generator for generating a synchronizing signal in synchronization with the first video image; and a transmitter for transmitting the synchronizing signal to the eyeglass device, and the eyeglass device includes: a receiver for receiving the synchronizing signal; a second generator for generating an internal signal in synchronization with the second video image, based on the synchronizing signal; an optical filter portion for adjusting amounts of incident light to left and right eyes, respectively; and a controller for controlling the optical filter portion based on the internal signal.Type: GrantFiled: November 30, 2009Date of Patent: January 29, 2013Assignee: Panasonic CorporationInventors: Hiroshi Mitani, Kazuhiro Mihara, Shuji Inoue, Masanobu Inoe, Seiji Nakazawa, Katsuo Saigo
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Publication number: 20130002666Abstract: The instant application describes display device for switching display mode between first display mode for displaying stereoscopic images with eyewear device which adjusts incident light amounts to the left and right eyes, and second display mode different from the first display mode. The display device includes signal generator which generates timing signals for notifying timings of increasing the incident light amount to the left and right eyes in the first and second display modes or stop signals for stopping the adjustment operation, as control signals for the adjustment operation; and transmitter which transmits the control signals to the eyewear device. During the first display mode, the transmitter transmits the timing signals for the first display mode. Switching operation from the first to second display mode causes the transmitter to transmit the stop signal and then the timing signal for the second display mode to the eyewear device.Type: ApplicationFiled: September 13, 2012Publication date: January 3, 2013Inventors: Kazuhiro Mihara, Keisuke Suetsugi, Katsuo Saigo, Seiji Nakazawa
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Patent number: 8294752Abstract: An image system comprises an image display device which displays images, and image viewing eyeglasses used for viewing images displayed by the image display device.Type: GrantFiled: September 25, 2009Date of Patent: October 23, 2012Assignee: Panasonic CorporationInventors: Kazuhiro Mihara, Hiroshi Miyai, Katsuo Saigo, Masafumi Shimotashiro, Seiji Nakazawa, Masayuki Kozuka, Yoshiho Gotoh
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Publication number: 20120154371Abstract: A display device including: a display portion for displaying a video; a generator for generating a synchronization signal including a command signal synchronized with display of frame images of the video; and a transmitter for transmitting the synchronization signal, wherein the command signal including a predetermined member of pulse signals has a leading pulse signal for notifying a start of the command signal, a terminal pulse signal for notifying an end of the command signal, and a control pulse signal for notifying a content of synchronization control synchronized with the display of the frame images.Type: ApplicationFiled: February 16, 2012Publication date: June 21, 2012Inventors: Kazuhiro MIHARA, Hiroshi Mitani, Shuji Inoue, Masanobu Inoe, Katsuo Saigo, Seiji Nakazawa
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Publication number: 20120038829Abstract: A display apparatus includes: input port for receiving input of video signal representing display color in red, green, and blue hues; display portion including pixel with red, green, blue and yellow sub-pixels for performing plasma emission in red, green, blue and yellow hues, respectively; and converter for converting video signal and outputting conversion signal for causing sub-pixels to emit light, respectively, such that display color corresponding to display color represented by video signal is displayed on display portion, wherein conversion signal output by converter includes red and green conversion signals for causing red and green sub-pixels to perform plasma emission at lower luminosity value than luminosity value used in the video signal, respectively, and yellow conversion signal for causing yellow sub-pixel to perform plasma emission, and yellow sub-pixel performs plasma emission with shorter afterglow time than red and green sub-pixels.Type: ApplicationFiled: October 26, 2011Publication date: February 16, 2012Inventors: Hiroshi Mitani, Yoshihisa Nagasaki, Seiji Nakazawa
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Publication number: 20120007965Abstract: A controller for controlling an eyeglass device which performs an assistance operation for assisting in stereoscopically viewing a video includes: a first acquisition portion for acquiring first frequency information relating to a display frequency of frame images of the video; a second acquisition portion for acquiring second frequency information relating to an environmental factor which periodically varies in an environment where the video is viewed; and a generator for generating a reference signal to adapt the assistance operation of the eyeglass device to display of the frame image and periodic variation of the environmental factor on the basis of the first frequency information and the second frequency information.Type: ApplicationFiled: September 20, 2011Publication date: January 12, 2012Inventors: Kazuhiro MIHARA, Yoshio Umeda, Seiji Nakazawa
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Publication number: 20120007966Abstract: An eyeglass device for assisting in viewing a video to be stereoscopically perceived includes an optical filter portion with left and right filters for adjusting light amount to be transmitted to left and right eyes, respectively and a controller for controlling adjustment operation of the light amount by the optical filter portion, wherein the controller switches a control mode of the optical filter portion between a first control mode of controlling the optical filter portion so that the adjustment operation becomes synchronized with display of a frame image of the video and a second control mode of controlling the optical filter so that that the adjustment operation becomes slower than a frame rate of the video to make a viewer perceive the adjustment operation which is asynchronous with the display of the frame image.Type: ApplicationFiled: September 23, 2011Publication date: January 12, 2012Inventors: Shuji INOUE, Hiroshi Mitani, Kazuhiro Mihara, Masanobu Inoe, Katsuo Saigo, Seiji Nakazawa
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Publication number: 20120002011Abstract: A display device including an input portion into which a reference signal with a predetermined frequency is input, a transmitter for transmitting a synchronization signal which is synchronized with display of video frame image, a determination portion for determining an intermittent transmission cycle including a first period in which the synchronization signal is transmitted and a second period without transmission of the synchronization signal on the basis of the reference signal, and a transmission controller for controlling the transmitter so that the synchronization signal is transmitted in the first period except for the second period. The determination portion adjusts a timing of the first period to avoid interference between the synchronization signals.Type: ApplicationFiled: September 7, 2011Publication date: January 5, 2012Inventors: Shuji INOUE, Kazuhiro Mihara, Seiji Nakazawa
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Publication number: 20110282740Abstract: To combine thrifty power consumption with up-to-dateness of displayed information, an information processing apparatus (100) includes: a battery unit (114); a remaining amount determining unit (113) which determines a remaining battery amount; a display unit (111) having a memory characteristic; a power-off determining unit (116) which specifies an amount of power to be supplied from the battery unit to the information processing apparatus that is equal to or less than a predetermined amount; a timer unit (115) which controls a start of supplying power at a predetermined time; and a control unit (110) which (i) causes the timer unit to set the predetermined time, and causes the amount of the power to be equal to or less than the predetermined amount, and (ii) displays, on the display unit, information about the remaining battery amount when the timer unit starts the supply of the power to the information processing apparatus.Type: ApplicationFiled: June 30, 2010Publication date: November 17, 2011Applicant: PANASONIC CORPORATIONInventors: Makoto Ochi, Takuji Maeda, Monta Nakatsuka, Kazuya Fujimura, Seiji Nakazawa
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Publication number: 20110205334Abstract: A display device for displaying a stereoscopic image including a left-eye image viewed by a left eye and a right-eye image viewed by a right eye including: a display portion configured to display the left-eye image and the right-eye image; and a transmitter configured to transmit a synchronization signal synchronized with the stereoscopic image, wherein the transmitter includes a first transmitter and a second transmitter disposed away from the first transmitter.Type: ApplicationFiled: December 17, 2010Publication date: August 25, 2011Inventors: Shuji INOUE, Kazuo Okamoto, Seiji Nakazawa
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Publication number: 20110134229Abstract: An image signal processing apparatus performs gradation control on respective pixels. Specifically, the image signal processing apparatus includes an image signal processing unit which controls light emission and non-light emission of respective subfields so as to provide a field having a level of brightness. Here, the field is a unit display period of the pixels and divided into the subfields which have different light emission periods and are arranged in a predetermined sequence. In the predetermined sequence, the subfields are arranged in a manner such that a subfield having the shortest light emission period among the subfields is in the first place, one of a subfield having the longest light emission period and a subfield having the second longest light emission period among the subfields is in the second place, and the other one is in the third place.Type: ApplicationFiled: September 3, 2010Publication date: June 9, 2011Inventors: Keizo MATSUMOTO, Hiroshi MIYAI, Katsuo SAIGO, Masanobu INOE, Seiji NAKAZAWA
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Publication number: 20110134228Abstract: An image signal processing apparatus outputs, alternately on a-per frame basis, a first image to be displayed to one of left and right eyes of a viewer and a second image to be displayed to the other eye, and transmits, to a pair of image viewer glasses, a synchronizing signal for controlling timing of opening and closing of optical filters so as to allow the viewer to see the output frames through corresponding eyes. Specifically, the apparatus includes: a persistence amount detecting unit which detects a persistence amount indicating an effect of a first frame in the first image on a second frame in the second image and immediately following the first frame; and an optical-filter adaptive control unit which generates the synchronizing signal indicating timing of opening and closing of the optical filter corresponding to the second frame. The timing is changed based on the persistence amount detected.Type: ApplicationFiled: September 3, 2010Publication date: June 9, 2011Inventors: Keizo MATSUMOTO, Hiroshi MIYAI, Katsuo SAIGO, Masanobu INOE, Seiji NAKAZAWA
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Publication number: 20100328194Abstract: The present invention discloses video system including a display device for displaying an video image and an eyeglass device for assisting a viewer in viewing the video image, wherein the display device includes: a display portion for displaying the video image; a first generation portion for generating a synchronizing signal for the video image; and a transmission portion for transmitting the synchronizing signal, the synchronizing signal representing control information with a duration of a continuous active time during which the control information is transmitted, and the eyeglass device includes: a reception portion for receiving the synchronizing signal; an optical filter portion for adjusting an incident light to a left eye and a right eye; a second generation portion for generating an internal signal based on the control information; and a control portion for controlling the optical filter portion based on the internal signal.Type: ApplicationFiled: November 27, 2009Publication date: December 30, 2010Inventors: Masanobu INOE, Kazuhiro Mihara, Hiroshi Mitani, Shuji Inoue, Seiji Nakazawa, Katsuo Saigo