Patents by Inventor Makoto Iwahara

Makoto Iwahara 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: 20120105432
    Abstract: The present invention provides a method for displaying a three-dimensional image without using a lens array with aberration and a highly defined flat display. The method comprises steps of arranging a plurality of basic units 8a, 8b, 8c . . . two-dimensionally; inputting image signals to the respective basic units 8a, 8b, 8c . . . ; and projecting light beams emitted from light sources 9a, 9b, 9c . . . two-dimensionally in space by driving the respective basic units in accordance with the inputted image signals. Light beams before emitting from the light sources are respectively modulated in their luminance in accordance with movements of the two-dimensionally projected light beams.
    Type: Application
    Filed: December 29, 2010
    Publication date: May 3, 2012
    Inventors: Hongen Liao, Makoto Iwahara, Takeyoshi Dohi
  • Publication number: 20100238545
    Abstract: The present invention provides a method of manufacturing a lens array for recording or reproducing three-dimensional images with enhanced precision comprising uniform convex lenses of excellent optical properties without difficulties. A plurality of circular plateaus 3m having uniform diameter and shape are formed two-dimensionally arranged with high precision on a transparent substrate 3 by utilizing a laser plotter or an electron beam exposure system. A predetermined amount of transparent liquid resin 5 is dropped onto the respective circular plateaus one after another. The transparent liquid resin is left as it is until it forms dome shapes on the respective plateaus due to its surface tension. The dome shaped transparent liquid resin 5? is hardened, so that the lens array having excellent and uniform optical properties two-dimensionally regularly arranged is obtained.
    Type: Application
    Filed: March 19, 2010
    Publication date: September 23, 2010
    Inventors: Hongen Liao, Takeyoshi Dohi, Makoto Iwahara
  • Patent number: 6909552
    Abstract: The present invention provides a three-dimensional image display device capable of reproducing clear, deviation-free and distortion-free three-dimensional images generated by a three-dimensional generating method. The three-dimensional image display device 4 comprises a lens array 1 having the predetermined number of convex lenses arranged in a matrix; and image display means for displaying a plurality of two-dimensional images 3 corresponding to the respective convex lenses. The same lens array 1 is employed in the three-dimensional display device as the lens array employed for generating the two-dimensional images.
    Type: Grant
    Filed: March 23, 2004
    Date of Patent: June 21, 2005
    Assignee: DHS, Ltd.
    Inventors: Takeyoshi Dohi, Makoto Iwahara, Nobuhiko Hata, Hongen Liao, Yoichi Katayama
  • Publication number: 20040190146
    Abstract: The present invention provides a three-dimensional image display device capable of reproducing clear, deviation-free and distortion-free three-dimensional images generated by a three-dimensional generating method. The three-dimensional image display device 4 comprises a lens array 1 having the predetermined number of convex lenses arranged in a matrix; and image display means for displaying a plurality of two-dimensional images 3 corresponding to the respective convex lenses. The same lens array 1 is employed in the three-dimensional display device as the lens array employed for generating the two-dimensional images.
    Type: Application
    Filed: March 23, 2004
    Publication date: September 30, 2004
    Applicant: DHS, Ltd.
    Inventors: Takeyoshi Dohi, Makoto Iwahara, Nobuhiko Hata, Hongen Liao, Yoichi Katayama
  • Patent number: 6626828
    Abstract: A body cavity-observing apparatus includes an endoscope with an imaging optical system on the front edge thereof, a prism movably mounted on the forefront of the imaging optical system, and an actuator to drive the prism on a given command signal. A different endoscope image is obtained by moving the prism, and thus, a wide range endoscope image can be easily obtained.
    Type: Grant
    Filed: June 18, 2001
    Date of Patent: September 30, 2003
    Assignee: The University of Tokyo
    Inventors: Takeyoshi Dohi, Ichiro Sakuma, Etsuko Kobayashi, Makoto Iwahara
  • Publication number: 20020022767
    Abstract: A body cavity-observing apparatus has an endoscope with an imaging optical system on the front edge thereof, a prism movably mounted on the forefront of the imaging optical system, and an actuator to drive the prism on a given command signal. Then, a different endoscope image is obtained by moving the prism, and thus, a wide range endoscope image can be easily obtained.
    Type: Application
    Filed: June 18, 2001
    Publication date: February 21, 2002
    Applicant: The University of Tokyo
    Inventors: Takeyoshi Dohi, Ichiro Sakuma, Etsuko Kobayashi, Makoto Iwahara
  • Patent number: 5140443
    Abstract: An apparatus for scanning an image, comprising a main unit body casing, a first original platen having a transparent surface on which a light-reflective original is placed, a second original platen movable in a horizontal direction inside the main unit body casing upon which platen a light-transmissive original is placed, a light source that irradiates light to the first and second original platens, an image sensor, and an optical apparatus disposed inside the body casing, and which respectively passes reflected light from the original placed on the first original platen and light transmitted through the original placed on the second original platen to the image sensor.
    Type: Grant
    Filed: July 24, 1990
    Date of Patent: August 18, 1992
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Makoto Iwahara, Tadayoshi Miyoshi, Shigeaki Tada, Takashi Kuriyama, Itsuo Takanashi, Ichiro Shishido, Kaoru Kitami
  • Patent number: 4831452
    Abstract: An image pickup device includes an optical modulator element for storing information corresponding to an optical image formed thereon, an imaging lens for forming an optical image of an object on the optical modulator element, and a device for reading the optical image information from the optical modulator element and for generating information corresponding to the optical image of the object formed on the optical modulator element.
    Type: Grant
    Filed: December 29, 1987
    Date of Patent: May 16, 1989
    Assignee: Victor Company of Japan Ltd.
    Inventors: Itsuo Takanashi, Shintaro Nakagaki, Makoto Iwahara, Hirohiko Shinonaga, Masato Furuya, Tsutou Asakura
  • Patent number: 4739418
    Abstract: An information signal recording disc is recorded with a stereoscopic television signal comprising a stereoscopic video signal and audio signals. The disc comprises a spiral track made up of a plurality of track turns, and video signals related to four fields are recorded on each of the plurality of track turns. Each track turn is time-sequentially recorded with right-eye and left-eye video signals of mutually different field numbers out of the right-eye and left-eye video signals of a simultaneous stereoscopic television signal in a sequence of field numbers together with audio signals, so that the right-eye video signal and the left-eye video signal are respectively recorded for a time period of two fields in each track turn. The right-eye and left-eye video signals related to identical fields are recorded side by side to each other in two mutually adjacent track turns.
    Type: Grant
    Filed: March 17, 1986
    Date of Patent: April 19, 1988
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Makoto Iwahara, Kiyoaki Suzuki, Hidetsugu Suzuki, Atsushi Sakamoto
  • Patent number: 4703506
    Abstract: A directional microphone apparatus includes an array of at least three sets of microphone units, circuits for processing the output signals from the microphone units to produce a first signal which varies in accordance with the second order bidirectional sound pressure gradient characteristic of the array, weighting circuits for applying respective weighting coefficients to the output signals from the microphone units in accordance with a desired shape of directivity response characteristic, to produce corresponding weighted signals which are combined to form a second signal. The first and second signals are combined to produce an output signal which exhibits sharp directivity even at relatively low frequencies in the audio range.
    Type: Grant
    Filed: July 22, 1986
    Date of Patent: October 27, 1987
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Atsushi Sakamoto, Makoto Iwahara
  • Patent number: 4696043
    Abstract: A microphone apparatus includes an array of equally spaced microphones divided into a center subarray and a pair of side subarrays located one on each side of the center subarray. A first weighting network having a plurality of weighting factors impresses a first weighting function on signals from the center subarray. Second and third weighting networks each having a plurality of weighting factors impress second and third weighting functions respectively on signals from the side subarrays. The first, second and third weighting functions correspond respectively to center and side portions of a total function. Signals from the first weighting network are summed in a first adder, signals from the second and third weighting networks being summed in a second adder and cmbined with the output of the first adder in a third adder to produce an output signal.
    Type: Grant
    Filed: August 16, 1985
    Date of Patent: September 22, 1987
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Makoto Iwahara, Naotaka Miyaji, Atsushi Sakamoto
  • Patent number: 4672434
    Abstract: A stereoscopic television system and apparatus comprise a memory for storing right-eye information related to odd and even fields and left-eye information related to the odd and even fields, a circuit for producing a main scanning direction synchronizing signal for synchronizing a scanning in a vertical direction of a reproduced picture and a sub scanning direction synchronizing signal for synchronizing a scanning in a horizontal direction of the reproduced picture, where the sub scanning direction synchronizing signal has a frequency which is m.+-.
    Type: Grant
    Filed: March 11, 1986
    Date of Patent: June 9, 1987
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Kiyoaki Suzuki, Makoto Iwahara, Hidetsugu Suzuki, Atsushi Sakamoto
  • Patent number: 4628525
    Abstract: An M-S type stereophonic microphone comprises a mid microphone unit having a main axis thereof directed to the front of the M-S type stereophonic microphone, a side microphone unit having a main axis thereof directed to the side of the M-S type stereophonic microphone and perpendicular to the direction of the main axis of the mid microphone unit, a unit support body for unitarily supporting the mid and side microphone units, a main microphone body frame, and a resilient support mechanism comprising resilient support members for resiliently supporting the unit support body on the frame. The resilient support mechanism resiliently supports the unit support body so that the unit support body is movable in the main axis direction of the mid microphone unit and in the main axis direction of the side microphone unit.
    Type: Grant
    Filed: March 7, 1985
    Date of Patent: December 9, 1986
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Makoto Iwahara, Hiroshi Ogawa
  • Patent number: 4559642
    Abstract: A phased-array sound pickup apparatus has an array of directional microphones having individual directivity patterns equally oriented in a given direction. The directivity patterns of the microphones combine into the main lobe of the array. A plurality of variable delay circuits are connected to be responsive respectively to individual signals from the microphones for providing incremental delays to the individual signals and combining the delayed signals for delivery as an output of the apparatus. A delay control circuit is coupled to the variable delay circuits for generating a delay control signal for controlling the amount of the incremental delays to cause the main lobe to be steered at an angle to the given direction as a function of the delay control signal.
    Type: Grant
    Filed: August 19, 1983
    Date of Patent: December 17, 1985
    Assignee: Victor Company of Japan, Limited
    Inventors: Naotaka Miyaji, Atsushi Sakamoto, Makoto Iwahara
  • Patent number: 4521908
    Abstract: In a phased-array sound pickup apparatus microphones are divided into a first and second subarrays, the microphones of the first subarray having individual unidirectional response patterns oriented on one side of the normal to the array and the microphones of the second subarray having their response patterns oriented on the other side of the normal so that the array's main lobe assumes different orientation from the orientation of the microphone's individual response patterns so that the array's unwanted back lobe falls outside of the microphone's response patterns. The microphones may be grouped into a plurality of pairs and the signals from the paired microphones are mixed so that different individual response patterns are generated in correlation with the array's main front lobe to cause the unwanted back lobe to occur outside of the individual response patterns.
    Type: Grant
    Filed: August 31, 1983
    Date of Patent: June 4, 1985
    Assignee: Victor Company of Japan, Limited
    Inventors: Naotaka Miyaji, Atsushi Sakamoto, Makoto Iwahara
  • Patent number: 4349698
    Abstract: Spatially correlated input audio signals are combined in a first combination of adder and subtracter to produce an input summation signal and an input difference signal, which are respectively translated by first and second filter circuits. The transfer function of the first filter circuit describes the relationship between the input summation signal and a summation of output audio signals and the transfer function of the second filter circuit describes the relationship between the input difference signal and a difference between the output audio signals. The translated signals are combined in a second combination of adder and subtracter to produce the output audio signals. Each of the filter circuits is designed with a minimum amount of phase shift which allows elimination of delay elements.
    Type: Grant
    Filed: June 18, 1980
    Date of Patent: September 14, 1982
    Assignee: Victor Company of Japan, Limited
    Inventor: Makoto Iwahara
  • Patent number: 4238744
    Abstract: A frequency band dividing filter comprises a delay-line filter which is supplied with an input signal and produces a divided frequency band signal as an output, a circuit for deriving a delayed signal in which the input signal has been delayed by a predetermined amount of time, and a circuit for substantially performing subtraction of the delayed signal output signal of the delay-line filter, and producing another divided frequency band output signal. The delay-line filter comprises a plurality of delay circuits cascade connected, coefficient multipliers respectively supplied with the input signal and the output signal of the delay circuits and for multiplying specific coefficients to the signals thus supplied, and an adder for adding output signals of each of the coefficient multipliers.
    Type: Grant
    Filed: September 6, 1978
    Date of Patent: December 9, 1980
    Assignee: Victor Company of Japan, Ltd.
    Inventor: Makoto Iwahara
  • Patent number: 4209665
    Abstract: A signal translator includes right- and left-channel translating networks, each being constructed to have a transfer function 1/(A+B), where A is the transfer function of a direct acoustic path between a right-channel sound source and a listener's ear and B is the transfer function of an acoustic crosstalk path between a left-channel sound source and the listener's ear. Through the right- and left-channel networks, the right and left channel components of spatially correlated audio signals undergo transformation of 1/(A+B). When binaural signals are applied to the translating networks, the translated output signals are applied to a pair of loudspeakers in a listening room in which the acoustic direct and crosstalk paths transform the signals so that the impinging sound at the listener's ears is a distortion-free audio signals.
    Type: Grant
    Filed: August 29, 1978
    Date of Patent: June 24, 1980
    Assignee: Victor Company of Japan, Limited
    Inventor: Makoto Iwahara
  • Patent number: 4199658
    Abstract: The speaker system of the invention comprises a pair of inner and outer rightward loudspeakers and a pair of inner and outer leftward loudspeakers all of which are arranged such that their points of sound transmission are aligned on an equal vertical straight plane in front of a listener and the inner speaker of each pair is horizontally inwardly spaced from the outer speaker of the same pair a distance which is equal to the distance between the respective ears of the human head to thereby form a parallel crosstalk cancellation planes extending perpendicular to the frontal plane on which the speakers are arranged. A first crosstalk cancellation network is connected between the input circuits of the outer rightward speaker and the inner leftward speaker and a second crosstalk cancellation network is connected between the inner rightward speaker and the outer leftward speaker. Right- and left-channel binaural signals are applied to the inner right and leftward speakers, respectively.
    Type: Grant
    Filed: September 7, 1978
    Date of Patent: April 22, 1980
    Assignee: Victor Company of Japan, Limited
    Inventor: Makoto Iwahara
  • Patent number: 4192969
    Abstract: A stereophonic reproduction system comprises a localization network receptive of sterophonic signals to localize of sonic images at desired locations. A crosstalk canceler, connected in tandem with the localization network, cancels acoustic crosstalk interference. The localization network comprises in each channel a first adder providing algebraic summation of the input signal of the own channel and a negative feedback signal supplied from its output through a first subtractor and through a first transfer circuit having a transfer function representing the ratio of hypothetical crosstalk path transfer function to hypothetical direct path transfer function. The subtractor also responds to the signal of the other channel to algebraically combine the received signal in phase through the first transfer circuit with the input signal of the own channel.
    Type: Grant
    Filed: September 7, 1978
    Date of Patent: March 11, 1980
    Inventor: Makoto Iwahara