Patents by Inventor Shin-ichi Kadowaki
Shin-ichi Kadowaki 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: 8152314Abstract: A display device (100) of the present invention has a first switch (3) and a second switch (4) on an upper surface of its casing, and includes a control circuit (18) for controlling the first switch (3) and the second switch (4) and a light source (19) inside the casing. The control circuit (18) performs control so that the light source (19) is turned on when the second switch (4) is pressed after a predetermined period of time has passed from when the first switch (3) was pressed. Thereby, the display device (100) of the present invention prevents entering of a person into a projection area before projection of video, and controls inadvertent start-up.Type: GrantFiled: May 22, 2006Date of Patent: April 10, 2012Assignee: Panasonic CorporationInventors: Toshifumi Yokoyama, Ken'ichi Kasazumi, Shin-ichi Kadowaki, Kiminori Mizuuchi, Hiroyuki Furuya, Kazuhisa Yamamoto
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Patent number: 8130614Abstract: An optical storage medium can be provided by which illegal usage of the optical storage medium involving an infringement on the copyright can be prevented effectively without impairment of the functions for reproducing physical format information and optical storage medium manufacturing information. The optical storage medium includes a main information region in which encrypted data information is recorded as a pit row that is capable of being read out by means of light and a control data region. In the control data region, key information for decoding the encryption of the data information, the physical format information and the optical storage medium manufacturing information are recorded by wobbling a groove.Type: GrantFiled: July 9, 2009Date of Patent: March 6, 2012Assignee: Panasonic CorporationInventors: Shin-ichi Kadowaki, Masaru Yamaoka, Takashi Yumiba, Toyoji Gushima, Makoto Usui, Shin-ichi Tanaka, Mitsurou Moriya
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Patent number: 8107346Abstract: An optical head device according to the present invention includes a splitting section for splitting a light beam having been reflected from an optical storage medium. The splitting section includes: a first main region transmitting a first interfering portion; a second main region transmitting a second interfering portion; and first and second sub-regions through which the first interfering portion is transmitted with a lower rate than in the first main region and through which the second interfering portion is transmitted with a lower rate than in the second main region. The splitting section splits the reflected light beam into: a first main light beam transmitted through the first main region; a second main light beam transmitted through the second main region; a first sub-light beam transmitted through the first sub-region; and a second sub-light beam transmitted through the second sub-region.Type: GrantFiled: April 24, 2006Date of Patent: January 31, 2012Assignee: Panasonic CorporationInventors: Kousei Sano, Yoshiaki Komma, Shin-ichi Kadowaki
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Patent number: 8089581Abstract: A display for illuminating a liquid crystal display panel with laser light of uniform light quantity distribution, and an illuminator for irradiating with laser light of uniform light quantity distribution. The display includes a liquid crystal display panel (204), laser light sources (205, 206, 207) emitting laser light having wavelengths of green, red, and blue colors, a waveguide plate (201) arranged at the back side of the liquid crystal display panel (204) and performing multiple reflection of laser light, and a diffusion plate (202) arranged at the back side of the waveguide plate (201), diffusing laser light propagating in the waveguide plate (201) and emitting the light toward the liquid crystal display panel (204).Type: GrantFiled: July 26, 2006Date of Patent: January 3, 2012Assignee: Panasonic CorporationInventors: Kiminori Mizuuchi, Kazuhisa Yamamoto, Shin-ichi Kadowaki, Tetsuro Mizushima, Akihiro Morikawa
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Patent number: 8027237Abstract: An optical storage medium can be provided by which illegal usage of the optical storage medium involving an infringement on the copyright can be prevented effectively without impairment of the functions for reproducing physical format information and optical storage medium manufacturing information. The optical storage medium includes a main information region in which encrypted data information is recorded as a pit row that is capable of being read out by means of light and a control data region. In the control data region, key information for decoding the encryption of the data information, the physical format information and the optical storage medium manufacturing information are recorded by wobbling a groove.Type: GrantFiled: July 9, 2009Date of Patent: September 27, 2011Assignee: Panasonic CorporationInventors: Shin-ichi Kadowaki, Masaru Yamaoka, Takashi Yumiba, Toyoji Gushima, Makoto Usui, Shin-ichi Tanaka, Mitsurou Moriya
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Patent number: 7969532Abstract: A surface illuminator has a uniform luminance over a large area by using a laser light source, has a wide color reproduction range, and is capable of suppressing a speckle noise. A liquid crystal display uses such a surface illuminator. The surface illuminator includes the laser light source that emits a laser beam; a beam scan section that deflects and scans the laser beam; and a first plate-shaped light guide that causes the laser beam deflected and scanned by the beam scan section to be incident from an end face portion and causes the incident laser beam to emit from a first major surface. Further, the liquid crystal display includes a liquid crystal display panel and the surface illuminator, wherein the surface illuminator is used as a backlight illuminator that lights the liquid crystal display panel from the backside in this liquid crystal display.Type: GrantFiled: November 15, 2006Date of Patent: June 28, 2011Assignee: Panasonic CorporationInventors: Tetsuro Mizushima, Ken'ichi Kasazumi, Kiminori Mizuuchi, Kazuhisa Yamamoto, Shin-ichi Kadowaki, Tatsuo Itoh
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Patent number: 7954962Abstract: A laser image display including a laser light source emitting laser light, a beam deflector element for receiving laser light and deflecting its advancing direction, a beam deflecting element control section for controlling the degree of deflection performed by the beam deflector element, an optical integrator for receiving and guiding the deflected laser light to output from its outputting end face, a pseudo surface light source element for scattering the deflected laser light, and a modulation element for receiving and modulating the laser light scattered by the false surface light source element.Type: GrantFiled: June 1, 2006Date of Patent: June 7, 2011Assignee: Panasonic CorporationInventors: Tetsuro Mizushima, Ken'ichi Kasazumi, Tatsuo Itoh, Tomoya Sugita, Kazuhisa Yamamoto, Shin-ichi Kadowaki
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Publication number: 20110085430Abstract: An optical disc drive having an optical pickup head emitting a light beam to an optical storage medium, detecting the light beam reflected from the optical storage medium, and outputting a signal based on the received reflected light, having a jitter measuring unit measuring jitter in signals output from the optical pickup head and having an evaluation unit determining from the measured jitter if the optical storage medium is good or defective. The jitter measuring unit measures jitter in a train of 3T or longer marks or spaces from an optical storage medium to which digital information is recorded as a train of marks or spaces of length kT based on a period T and an integer k of two or more.Type: ApplicationFiled: November 22, 2010Publication date: April 14, 2011Inventors: Shin-ichi Kadowaki, Mamoru Shoji, Atsushi Nakamura, Takashi Ishida
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Publication number: 20110080927Abstract: The light sources according to the present invention include a laser oscillator including a semiconductor laser, a drive circuit for the semiconductor laser, an ACC circuit, an APC circuit, and a switch, and a starting drive current storage device, and is controlled in such a manner that the driving current at the start of the laser driving be always constant, and after the start of the lighting, it is switched to the APC operation to carry out the power control of the laser light output.Type: ApplicationFiled: December 14, 2010Publication date: April 7, 2011Inventors: Akihiro MORIKAWA, Ken'ichi KASAZUMI, Tetsuro MIZUSHIMA, Kazuhisa YAMAMOTO, Shin-ichi KADOWAKI
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Patent number: 7873087Abstract: The light sources according to the present invention include a laser oscillator including a semiconductor laser, a drive circuit for the semiconductor laser, an ACC circuit, an APC circuit, and a switch, and a starting drive current storage device, and is controlled in such a manner that the driving current at the start of the laser driving be always constant, and after the start of the lighting, it is switched to the APC operation to carry out the power control of the laser light output.Type: GrantFiled: July 11, 2006Date of Patent: January 18, 2011Assignee: Panasonic CorporationInventors: Akihiro Morikawa, Ken'ichi Kasazumi, Tetsuro Mizushima, Kazuhisa Yamamoto, Shin-ichi Kadowaki
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Patent number: 7872952Abstract: An optical disk apparatus according to the present invention includes: a light emission section for emitting laser light; an optical system for irradiating the optical disk medium with the laser light; and an aberration control section for controlling aberration of the laser light. In one embodiment, the aberration control section repeatedly switches between a plurality of aberration setting states in a focus lock-in operation. In another embodiment, the aberration control section simultaneously sets a plurality of aberration setting states in a focus lock-in operation. As a result, a plurality of aberration setting states can be allowed to substantially coexist within a single optical system.Type: GrantFiled: September 20, 2005Date of Patent: January 18, 2011Assignee: Panasonic CorporationInventors: Akira Kurozuka, Shin-ichi Kadowaki, Joji Anzai, Osamu Kajino
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Patent number: 7869326Abstract: An optical disc drive having an optical pickup head emitting a light beam to an optical storage medium, detecting the light beam reflected from the optical storage medium, and outputting a signal based on the received reflected light, having a jitter measuring unit measuring jitter in signals output from the optical pickup head and having an evaluation unit determining from the measured jitter if the optical storage medium is good or defective. The jitter measuring unit measures jitter in a train of 3T or longer marks or spaces from an optical storage medium to which digital information is recorded as a train of marks or spaces of length kT based on a period T and an integer k of two or more.Type: GrantFiled: July 23, 2009Date of Patent: January 11, 2011Assignee: Panasonic CorporationInventors: Shin-ichi Kadowaki, Mamoru Shoji, Atsushi Nakamura, Takashi Ishida
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Publication number: 20100165307Abstract: A laser image display comprising a laser light source emitting laser light, a beam deflector element for receiving laser light and deflecting its advancing direction, a beam deflecting element control section for controlling the degree of deflection performed by the beam deflector element, an optical integrator for receiving and guiding the deflected laser light to output from its outputting end face, a pseudo surface light source element for scattering the deflected laser light, and a modulation element for receiving and modulating the laser light scattered by the false surface light source element.Type: ApplicationFiled: June 1, 2006Publication date: July 1, 2010Inventors: Tetsuro Mizushima, Ken'ichi Kasazumi, Tatsuo Itoh, Tomoya Sugita, Kazuhisa Yamamoto, Shin-ichi Kadowaki
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Publication number: 20100103347Abstract: A display for illuminating a liquid crystal display panel with laser light of uniform light quantity distribution, and an illuminator for irradiating with laser light of uniform light quantity distribution are provided. The display includes a liquid crystal display panel 204, laser light sources 205, 206, 207 emitting laser light having wavelengths of green, red, and blue colors, a waveguide plate 201 arranged at the back side of the liquid crystal display panel 204 and performing multiple reflection of laser light, and a diffusion plate 202 arranged at the back side of the waveguide plate 201, diffusing laser light propagating in the waveguide plate 201 and emitting the light toward liquid crystal display panel 204.Type: ApplicationFiled: July 26, 2006Publication date: April 29, 2010Inventors: Kiminori Mizuuchi, Kazuhisa Yamamoto, Shin-ichi Kadowaki, Tetsuro Mizushima, Akihiro Morikawa
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Patent number: 7649824Abstract: An optical storage medium can be provided by which illegal usage of the optical storage medium involving an infringement on the copyright can be prevented effectively without impairment of the functions for reproducing physical format information and optical storage medium manufacturing information. The optical storage medium includes a main information region in which encrypted data information is recorded as a pit row that is capable of being read out by means of light and a control data region. In the control data region, key information for decoding the encryption of the data information, the physical format information and the optical storage medium manufacturing information are recorded by wobbling a groove.Type: GrantFiled: June 30, 2003Date of Patent: January 19, 2010Assignee: Panasonic CorporationInventors: Shin-ichi Kadowaki, Masaru Yamaoka, Takashi Yumiba, Toyoji Gushima, Makoto Usui, Shin-ichi Tanaka, Mitsurou Moriya
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Publication number: 20090303417Abstract: The present invention provides a surface illuminator having a uniform luminance over a large area by using a laser light source, having a wide color reproduction range, and capable of suppressing a speckle noise, as well as a liquid crystal display using the same. The surface illuminator of the present invention includes the laser light source that emits a laser beam; a beam scan section that deflects and scans the laser beam; and a first plate-shaped light guide that makes the laser beam deflected and scanned by the beam scan section to be incident from an end face portion and making the incident laser beam to emit from a first major surface. Further, the liquid crystal display of the present invention includes a liquid crystal display panel and the surface illuminator, wherein the surface illuminator is used as a backlight illuminator that lights the liquid crystal display panel from backside in this liquid crystal display.Type: ApplicationFiled: November 15, 2006Publication date: December 10, 2009Inventors: Tetsuro Mizushima, Ken'ichi Kasazumi, Kiminori Mizuuchi, Kazuhisa Yamamoto, Shin-ichi Kadowaki, Tatsuo Itoh
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Publication number: 20090279405Abstract: An optical disc drive having an optical pickup head emitting a light beam to an optical storage medium, detecting the light beam reflected from the optical storage medium, and outputting a signal based on the received reflected light, having a jitter measuring unit measuring jitter in signals output from the optical pickup head and having an evaluation unit determining from the measured jitter if the optical storage medium is good or defective. The jitter measuring unit measures jitter in a train of 3T or longer marks or spaces from an optical storage medium to which digital information is recorded as a train of marks or spaces of length kT based on a period T and an integer k of two or more.Type: ApplicationFiled: July 23, 2009Publication date: November 12, 2009Inventors: Shin-ichi Kadowaki, Mamoru Shoji, Atsushi Nakamura, Takashi Ishida
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Patent number: RE42825Abstract: An optical pickup head device includes a diffraction grating for generating zero-order diffracted light and at least first-order diffracted light and provides a tracking error signal with a DPP method. The diffraction grating includes grating patterns with a nonuniform period or phase. The size of the first-order diffracted light converged on an optical recording medium is larger in the direction parallel to a tangent to the track than in the direction perpendicular to the tangent. P1/P0>PW2/PW1 is established, where PW1 represents the power that is required to record information on the optical recording medium, PW2 represents the maximum power that allows information recorded on the optical recording medium to be reproduced without being erased, P0 represents the light amount of the zero-order diffracted light converged on the optical recording medium, and P1 represents the light amount of the at least first-order diffracted light converged on the optical recording medium.Type: GrantFiled: May 22, 2007Date of Patent: October 11, 2011Assignee: Panasonic CorporationInventors: Shin-Ichi Kadowaki, Yoshiaki Komma, Kousei Sano
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Patent number: RE43126Abstract: An optical pickup head is provided with a light source, a diffracting means for creating a plurality of diffracted beams, a converging means for focusing the diffracted beams onto an optical storage medium, a beam branching means for branching the plurality of beams reflected by the optical storage medium, and an optical detecting means for outputting a signal corresponding to the amount of light of the received beams. The optical detecting means has main beam light receiving portions and sub-beam light receiving portions. The amount of light of the first or higher order diffracted beams when they are substantially focused on and reflected by a focus plane of the plurality of information recording planes is equal to or greater than the amount of light of the zero order diffracted beam when it is reflected without focusing by a non-focus plane other then the focus plane of the plurality of information recording planes.Type: GrantFiled: September 28, 2006Date of Patent: January 24, 2012Assignee: Panasonic CorporationInventors: Hideki Hayashi, Sadao Mizuno, Daisuke Ogata, Shin-ichi Kadowaki, Kousei Sano, Jouji Anzai, Akihiro Yasuda
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Patent number: RE44808Abstract: An optical disc drive having an optical pickup head emitting a light beam to an optical storage medium, detecting the light beam reflected from the optical storage medium, and outputting a signal based on the received reflected light, having a jitter measuring unit measuring jitter in signals output from the optical pickup head and having an evaluation unit determining from the measured jitter if the optical storage medium is good or defective. The jitter measuring unit measures jitter in a train of 3T or longer marks or spaces from an optical storage medium to which digital information is recorded as a train of marks or spaces of length kT based on a period T and an integer k of two or more.Type: GrantFiled: January 8, 2013Date of Patent: March 18, 2014Assignee: Panasonic CorporationInventors: Shin-ichi Kadowaki, Mamoru Shoji, Atsushi Nakamura, Takashi Ishida