Patents by Inventor Atsushi Ozawa

Atsushi Ozawa 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: 20080150970
    Abstract: A peak intensity level control device that controls a peak intensity level in a self light-emitting display module of active matrix driving type is disclosed. The device includes: an average picture value calculation section that calculates an average picture value of display data to be supplied to the self light-emitting display module; a driving condition control section that controls, at a time of performing intensity-up driving with respect to the peak intensity level, a driving condition of the self light-emitting display module to be able to derive the peak intensity level suited for the average picture value; and a gamma change section that applies, at the time of performing the intensity-up driving with respect to the peak intensity level, gamma change to the display data not to increase power consumption compared with driving with the peak intensity level of a standard value.
    Type: Application
    Filed: December 17, 2007
    Publication date: June 26, 2008
    Applicant: Sony Corporation
    Inventors: Atsushi Ozawa, Mitsuru Tada
  • Publication number: 20080062208
    Abstract: Disclosed herein is a power consumption reduction device including: a region-adaptive gray level conversion unit; wherein the gray level conversion unit is operable to convert n1 bits of gray level information for a low gray level region into m1 (<n1) bits of gray level information, further operable to convert n2 bits of gray level information for an intermediate gray level region into m2 (?n2) bits of gray level information, and still further operable to convert n3 bits of gray level information for a high gray level region into m3 (<n3) bits of gray level information, and the gray level conversion unit converts a gray level of an input video signal so that m1?m2, m3?m2 and n1+n2+n3>m1+m2+m3 are all satisfied.
    Type: Application
    Filed: August 27, 2007
    Publication date: March 13, 2008
    Applicant: Sony Corporation
    Inventors: Mitsuru Tada, Atsushi Ozawa
  • Patent number: 7322607
    Abstract: A telescopic shaft for steering of a vehicle is assembled in a steering shaft and includes a male shaft and a female shaft that are so fitted as not to be rotatable but to be slidable. Rolling members are fitted through an elastic body for pre-load between at least a pair of axially-extending grooves formed in an outer peripheral surface of the male shaft and in an inner peripheral surface of the female shaft. A slide member is fitted in between at least another pair of axially-extending grooves formed in the outer peripheral surface of the male shaft and in the inner peripheral surface of the female shaft. When a steering toque is equal to or smaller than a predetermined level, the elastic body for the pre-load exhibits a low rigidity characteristic as the elastic body performs pre-load action. When the steering torque is equal to or larger than the predetermined level, the slide member exhibits a high rigidity characteristic as the slide member engages with the pair of axially extending grooves.
    Type: Grant
    Filed: June 10, 2003
    Date of Patent: January 29, 2008
    Assignee: NSK Ltd.
    Inventors: Yasuhisa Yamada, Akihiro Shoda, Atsushi Ozawa, Kinji Yukawa, Takatsugu Yamada
  • Publication number: 20080018640
    Abstract: Disclosed herein is a power consumption detection apparatus including: a line current calculation section configured to calculate, based on an image signal, a value of a line current consumed by each of horizontal lines; and a power consumption calculation section configured to calculate, on a horizontal line cycle, power consumed by an entire display panel based on the most recent values of the line currents, the values corresponding in number to a vertical resolution.
    Type: Application
    Filed: June 29, 2007
    Publication date: January 24, 2008
    Applicant: Sony Corporation
    Inventors: Mitsuru Tada, Atsushi Ozawa
  • Publication number: 20070273137
    Abstract: A telescopic shaft for steering of a vehicle is assembled in a steering shaft and includes a male shaft and a female shaft that are so fitted as not to be rotatable but to be slidable. Rolling members are fitted through an elastic body for pre-load between at least a pair of axially-extending grooves formed in an outer peripheral surface of the male shaft and in an inner peripheral surface of the female shaft. A slide member is fitted in between at least another pair of axially-extending grooves formed in the outer peripheral surface of the male shaft and in the inner peripheral surface of the female shaft. When a steering toque is equal to or smaller than a predetermined level, the elastic body for the pre-load exhibits a low rigidity characteristic as the elastic body performs pre-load action. When the steering torque is equal to or larger than the predetermined level, the slide member exhibits a high rigidity characteristic as the slide member engages with the pair of axially extending grooves.
    Type: Application
    Filed: August 2, 2007
    Publication date: November 29, 2007
    Inventors: Yasuhisa YAMADA, Akihiro SHODA, Atsushi OZAWA, Kinji Yukawa, Takatsugu YAMADA
  • Publication number: 20070252846
    Abstract: The present invention provides a character highlighting control apparatus including a character pixel extractor and a highlighting degree controller. The character pixel extractor is configured to extract a pixel corresponding to a character part from input image data. The highlighting degree controller is configured to carry out control in such a way that a maximum emission luminance of a display device is linked with input image data, to thereby selectively increase an emission luminance of an extracted pixel on a display screen and avoid increase of an emission luminance of a background part on the display screen.
    Type: Application
    Filed: April 24, 2007
    Publication date: November 1, 2007
    Applicant: Sony Corporation
    Inventors: Atsushi Ozawa, Mitsuru Tada
  • Publication number: 20070236431
    Abstract: A light-emitting display device is disclosed. The display includes: a display panel having a plurality of light-emitting elements disposed on a substrate in a matrix; a deterioration amount difference calculation section; a correction amount calculation section; a deterioration amount difference correction section; a gamma conversion section; an actual deterioration amount calculation section; and an estimation error detection section.
    Type: Application
    Filed: March 7, 2007
    Publication date: October 11, 2007
    Applicant: Sony Corporation
    Inventors: Mitsuru Tada, Atsushi Ozawa
  • Patent number: 7270606
    Abstract: A power transmission device prevents vibration in a rotation direction and collision noise, even if a shock absorbing rubber is permanently deformed in a compression direction. Specifically, even if compression forces repeatedly applied to a shock absorbing rubber causes the shock absorbing rubber to be permanently deformed in a compression direction, an elastic member placed between the shock absorbing rubber and each protrusion presses circumferentially the shock absorbing rubber of a pulley and a transmission ring, and therefore, a shock of an abrupt rotation number change caused by rattling between the shock absorbing rubber and the transmission ring may be absorbed by the elastic member, and vibration in a rotation direction and collision noise may be prevented.
    Type: Grant
    Filed: April 19, 2005
    Date of Patent: September 18, 2007
    Assignee: Sanden Corporation
    Inventors: Yoshihiro Ochiai, Atsushi Ozawa
  • Publication number: 20070176861
    Abstract: A self-luminous display apparatus capable of varying a peak luminance of a display panel in a unit of one frame, includes: a mean gradation value calculation section configured to calculate a mean gradation value of a video signal in a unit of a frame for each one frame; a specific condition detection section configured to detect, based on the mean gradation values calculated over a period of several frames, an input of the video signal which satisfies a specific condition in which a drop of a physical peak luminance is not likely to be perceived visually; and a light emission condition control section configured to perform dropping control of the peak luminance in a unit of a frame so that a dropping condition set in advance may be satisfied for a period of time after the frame which satisfies the specific condition is detected until the detection state is canceled.
    Type: Application
    Filed: November 17, 2006
    Publication date: August 2, 2007
    Applicant: Sony Corporation
    Inventors: Mitsuru Tada, Atsushi Ozawa
  • Publication number: 20070139406
    Abstract: Disclosed herein is a self light emission display device includes a buffer memory configured to delay the supply of pixel data to a self light emission panel, a lookup table configured to store all gradation values corresponding to a variable range of the pixel data and electric power values to be consumed for light emission respectively at the gradation values, in association with each other, and a power consumption calculator configured to add respective power consumption values of all pixels of a frame which are determined by referring to said lookup table to calculate a power consumption value of the frame.
    Type: Application
    Filed: December 1, 2006
    Publication date: June 21, 2007
    Applicant: Sony Corporation
    Inventors: Atsushi Ozawa, Mitsuru Tada
  • Publication number: 20070126672
    Abstract: A self-luminous display apparatus, a peak luminance adjustment apparatus is disclosed wherein power to be consumed by a self-luminous display panel is compulsorily suppressed to a level within a prescribed range and consequently the life of a battery is maintained. A mean gradation value calculation section calculates a mean gradation value of a video signal inputted within a period of one frame. A power consumption calculation section determines a standard peak luminance corresponding to the calculated mean gradation value and calculates a power consumption amount to be consumed based on the standard peak luminance and the calculated mean gradation value. A peak luminance adjustment section adjusts the standard peak luminance so that a total value of the power consumption to be consumed within a fixed period of time may not exceed a preset power amount.
    Type: Application
    Filed: November 22, 2006
    Publication date: June 7, 2007
    Applicant: Sony Corporation
    Inventors: Mitsuru Tada, Hiroshi Hasegawa, Atsushi Ozawa
  • Publication number: 20070103408
    Abstract: Disclosed herein is a self-luminous display apparatus including a light emission panel whose light emission time period can be varied within a period of one frame, including: an area-specific motion decision section configured to make a decision between a moving picture area and a still picture area for each one frame; a frame-specific motion decision section configured to decide a frame having a high ratio of moving picture areas as a moving picture frame but decide a frame having a low ratio of moving picture areas as a still picture frame; and a light emission condition control section configured to control, when a frame decided as a moving picture frame by the frame-specific motion decision section is to be displayed, so that a peak luminance to be visually observed may be kept fixed and to decrease the light emission time period of the light emission panel from a reference light emission time period.
    Type: Application
    Filed: November 6, 2006
    Publication date: May 10, 2007
    Inventors: Mitsuru Tada, Atsushi Ozawa
  • Publication number: 20060164348
    Abstract: A self-luminous apparatus is disclosed wherein a deterioration amount difference between different pixels can be eliminated accurately to correct a sticking phenomenon while the self-luminous apparatus is used. In the self-luminous apparatus, a deterioration amount difference appearing between a correction object pixel and a reference pixel within a first light emission period of time is calculated first using a deterioration ratio derived from gradation values of the pixels. Then, a deterioration ratio for correction for the correction object pixel necessary to eliminate the calculated deterioration amount difference within a second light emission period of time is derived using a deterioration ratio of the reference pixel. Thereafter, the derived deterioration ratio for correction is converted into a corresponding gradation value, and the correction object pixel is driven to emit light with the converted gradation value.
    Type: Application
    Filed: January 4, 2006
    Publication date: July 27, 2006
    Applicant: Sony Corporation
    Inventors: Atsushi Ozawa, Mitsuru Tada
  • Patent number: 7041019
    Abstract: In an automotive compressor, a pulley (6) is rotatably supported on a compressor housing (1) through a bearing (5) to have an axial gap (10) left between the compressor housing and the pulley. A waterproof cover (13) covers the axial gap and serves to suppress water from the outside from reaching the bearing. The waterproof cover is fixed to the compressor housing by a ring-shaped fastener (14). Instead of use of the waterproof cover, the axial gap may be controlled in size thereof.
    Type: Grant
    Filed: March 13, 2003
    Date of Patent: May 9, 2006
    Assignee: Sanden Corporation
    Inventors: Tomohiko Matsubara, Atsushi Ozawa
  • Publication number: 20050261092
    Abstract: The present invention provides a power transmission device of a compressor that can always transmit power satisfactorily without transmitting a rotation number fluctuation applied from a power source to a pulley to a transmission member. Specifically, a one-way clutch is provided between the pulley and a torque plate, thereby allowing torque in one direction only of the pulley to be transmitted to the torque plate. Therefore, even if power from a power source such as an internal combustion engine in which the rotation number fluctuates in a short cycle is transmitted to the pulley, torque at the time of reduction in the rotation number is not transmitted to the torque plate, and inertial torque of a rotation component of the compressor produced by the reduction in the rotation number is reduced to reduce vibration or noise of the compressor. The one-way clutch is placed between a pulley body and a support portion, thereby reducing an axial size of the entire power transmission device to save space.
    Type: Application
    Filed: May 17, 2005
    Publication date: November 24, 2005
    Applicant: Sanden Corporation
    Inventors: Yoshihiro Ochiai, Atsushi Ozawa
  • Publication number: 20050245337
    Abstract: A power transmission device has a driving pulley disposed in a power transmitting path between a vehicle engine and a compressor for an air conditioning system of the vehicle and is rotatably supported on the compressor, and a driven rotor arranged in the driving pulley, for connecting between the driving pulley and a drive shaft of the compressor. The driven rotor has an outer ring forming its outer circumferential surface, a plurality of connecting lugs integrally formed in the outer ring, for fastening the outer ring to one end face of the driving pulley with connecting bolts, and a hardened layer formed in the entire surfaces of the connecting lugs by heat treatment.
    Type: Application
    Filed: April 28, 2005
    Publication date: November 3, 2005
    Applicant: Sanden Corporation
    Inventors: Hiroaki Matsuyama, Atsushi Ozawa
  • Publication number: 20050230208
    Abstract: There is provided a power transmission device that causes no vibration in a rotation direction and collision noise even if a shock absorbing rubber is permanently deformed in a compression direction. Specifically, even if compression forces repeatedly applied to a shock absorbing rubber 12 causes the shock absorbing rubber 12 to be permanently deformed in a compression direction, an elastic member 16 placed between the shock absorbing rubber 12 and each protrusion 11a presses the shock absorbing rubber 12 circumferentially of a pulley 10 and a transmission ring 11, and therefore, a shock of an abrupt rotation number change caused by rattling between the shock absorbing rubber 12 and the transmission ring 11 can be absorbed by the elastic member 16, and vibration in a rotation direction and collision noise can be prevented.
    Type: Application
    Filed: April 19, 2005
    Publication date: October 20, 2005
    Applicant: Sanden Corporation
    Inventors: Yoshihiro Ochiai, Atsushi Ozawa
  • Publication number: 20050143208
    Abstract: The invention provides a pulley that can prevent the rusting of an insertion member without using expensive heat resistant plating treatment and effectively prevent the slippage between a pulley main body and an insertion member. That is, the pulley main body 10a is integrally formed by the injection molding of synthetic resin on the outer circumferential surface side of the insertion member 11b in which painting having rust preventive properties and heat resistant properties is applied to at least part of surfaces including the outer circumferential surface. Therefore, the rusting of the insertion member 11b can be effectively prevented and besides even when the interior of a mold during injection molding comes to a high temperature state, the painting applied to the surface of the insertion member 11b will not deteriorate due to the high temperature and the corrosion resistance of the insertion member 11b will not be decreased.
    Type: Application
    Filed: December 27, 2004
    Publication date: June 30, 2005
    Inventors: Atsushi Ozawa, Hidenao Takahashi
  • Publication number: 20050104354
    Abstract: A telescopic shaft for steering of a vehicle is assembled in a steering shaft and includes a male shaft and a female shaft that are so fitted as not to be rotatable but to be slidable. Rolling members are fitted through an elastic body for pre-load between at least a pair of axially-extending grooves formed in an outer peripheral surface of the male shaft and in an inner peripheral surface of the female shaft. A slide member is fitted in between at least another pair of axially-extending grooves formed in the outer peripheral surface of the male shaft and in the inner peripheral surface of the female shaft. When a steering toque is equal to or smaller than a predetermined level, the elastic body for the pre-load exhibits a low rigidity characteristic as the elastic body performs pre-load action. When the steering torque is equal to or larger than the predetermined level, the slide member exhibits a high rigidity characteristic as the slide member engages with the pair of axially extending grooves.
    Type: Application
    Filed: June 10, 2003
    Publication date: May 19, 2005
    Inventors: Yasuhisa Yamada, Akihiro Shoda, Atsushi Ozawa, Kinji Yukawa, Takatsugu Yamada
  • Publication number: 20040245759
    Abstract: A vehicle steering telescopic shaft having a male shaft and a female shaft so fitted to each other as not to be rotatable but to be slidable. First torque transmitting members are disposed between the male shaft and the female shaft, and roll when the male shaft and the female shaft make relative movements in axial directions. Elastic members are disposed adjacent in a radial direction to the first torque transmitting members and restrict them when rotated and apply a pre-load to the male shaft and the female shaft through the first torque transmitting members when not rotated. Second torque transmitting members are provided between the male shaft and the female shaft, and slide when the male shaft and the female shaft make the relative movements in the axial directions, and transmit a torque when rotated.
    Type: Application
    Filed: March 11, 2004
    Publication date: December 9, 2004
    Inventors: Yasuhisa Yamada, Akihiro Shoda, Atsushi Ozawa, Masato Taniguchi