Patents by Inventor Koji Fujiwara

Koji Fujiwara 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: 20040080498
    Abstract: A pen input unit includes ultrasonic receivers that receive an ultrasonic signal transmitted from an ultrasonic transmitter of an input pen. Based on the received signal, the distance (distance value) of the ultrasonic transmitter from each of the ultrasonic receivers is determined. The distance value is used for the display control of the display panel, and is supplied to a reception sensitivity control section. The reception sensitivity control section carries out reception sensitivity control for reducing a difference in level of the respective waveforms received by the ultrasonic receivers. As a result, a pen input display device of an ultrasonic pen input system is provided that prevents errors over the entire input area of the display panel without increasing power consumption or impairing operability of pen entry.
    Type: Application
    Filed: September 30, 2003
    Publication date: April 29, 2004
    Inventors: Koji Fujiwara, Naoto Inoue
  • Patent number: 6724359
    Abstract: An electronic device includes on a substrate: a plurality of first capacitors each including a first electrode and a second electrode opposing the first electrode via a first dielectric layer; a plurality of second capacitors each including a third electrode electrically connected to the first electrode and a fourth electrode opposing the third electrode via a second dielectric layer; a first line whose electrical connection to the first electrode and the third electrode is turned ON/OFF by a first switching element; a second line electrically connected to the second electrode at least temporarily; a third line whose electrical connection to the fourth electrode is turned ON/OFF by a second switching element; and a fourth line whose electrical connection to the fourth electrode is turned ON/OFF by a third switching element.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: April 20, 2004
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tomohiko Yamamoto, Keiichi Tanaka, Hideki Ichioka, Naoto Inoue, Koji Fujiwara
  • Publication number: 20040060745
    Abstract: A self-propelled working vehicle comprises a front wheel unit, a rear wheel unit including a left rear wheel and a right rear wheel, and a drive transmission apparatus for transmitting drive from an engine to the rear wheel unit. The drive transmission apparatus includes a first drive transmission mechanism for transmitting the drive to the left rear wheel and a second drive transmission mechanism for transmitting the drive to the right rear wheel. The first transmission mechanism is arranged at the left side of the vehicle body, while the second transmission mechanism is arranged at the right side of the vehicle body. A brake assembly is arranged between the first drive transmission mechanism and the second drive transmission mechanism for acting on an output shaft of a first transmission unit and an output shaft of a second transmission unit. The first and second transmission units act as first and second change speed devices, respectively, which are operable independently of each other.
    Type: Application
    Filed: February 28, 2003
    Publication date: April 1, 2004
    Applicant: KUBOTA CORPORATION
    Inventors: Hideya Umemoto, Takeshi Komorida, Shoso Ishimori, Takashi Fujii, Koji Fujiwara, Hiroyuki Tada
  • Publication number: 20030197691
    Abstract: The invention concerns an input device including an input receiving panel and a stylus enabling an input, the input device sensing an input by means of capacitive coupling between a panel electrode on the input receiving panel and a stylus electrode on the stylus, and includes: a signal supply section supplying an input sensing signal to the panel electrode; a signal detecting circuit detecting a signal generated in the stylus electrode; and an input sensing section comparing the input sensing signal with the detection signal detected by the signal detecting circuit and sensing an input based on a result of the comparison. An input-sensing digital code is superimposed on the input sensing signal. This allows for further reduction in the possibility of false sensing caused by noise than conventional techniques.
    Type: Application
    Filed: April 17, 2003
    Publication date: October 23, 2003
    Inventors: Koji Fujiwara, Naoto Inoue, Tomohiko Yamamoto, Keiichi Tanaka, Hideki Ichioka
  • Patent number: 6614416
    Abstract: A wave A1 is used as a signal inputted to a liquid crystal panel via an operational amplifier OP. The wave A1 is a superimposed wave made up of, for example, a first rectangular wave to be the base of a driving signal and a second wave capable of increasing respective amplitudes of the first wave in rising and falling directions. Because a wave A3 is superimposed, using the wave A1 as the driving signal of the liquid crystal panel surely results in increase in a quantity of charges with which respective pixels of the liquid crystal panel are supplied at early stages of writing, more than simply applying the wave A2 to the liquid crystal panel.
    Type: Grant
    Filed: October 13, 2000
    Date of Patent: September 2, 2003
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tomohiko Yamamoto, Naoto Inoue, Keiichi Tanaka, Koji Fujiwara, Hideki Ichioka
  • Publication number: 20030137629
    Abstract: A display device includes: a first substrate including data electrodes and first and second groups of connecting pads; a second substrate, which faces the first substrate and which includes data signal input terminals, a spare line, and third and fourth groups of connecting pads opposed to the first and second groups of connecting pads, respectively; and a display medium layer interposed between the first and second substrates. The data signal input terminals are connected to the third group of connecting pads. In case of disconnection, a data signal to be supplied to one of the data electrodes may be input through the spare line. The fourth group of connecting pads crosses the spare line with an insulating layer interposed between them. Each pair of connecting pads in the first and third groups or the second and fourth groups is electrically connected together with an anisotropic conductive material.
    Type: Application
    Filed: January 21, 2003
    Publication date: July 24, 2003
    Inventors: Hideki Ichioka, Tomohiko Yamamoto, Keiichi Tanaka, Naoto Inoue, Koji Fujiwara
  • Publication number: 20030128177
    Abstract: A driving method of a liquid crystal display device is performed with respect to a liquid crystal display device arranged so that: a TFT having a gate electrode, a drain electrode, and a source electrode is provided on a first substrate; the gate electrode is connected to a scanning line, the drain electrode is connected to a pixel electrode and the source electrode is connected to a reference line; and signal lines are provided on a second substrate opposite to the first substrate; and the liquid crystal display device applies an electric field to a liquid crystal layer provided between the pixel electrode and the second substrate. The method comprising the step of: driving the signal lines that apply a voltage to a line of pixels scanned by the scanning line so that signal lines Sm−1 and Sm+1 at both ends of three adjacent signal lines Sm−1, Sm and Sm+1 are respectively supplied with a voltage opposite to each other in polarity.
    Type: Application
    Filed: December 10, 2002
    Publication date: July 10, 2003
    Inventors: Naoto Inoue, Tomohiko Yamamoto, Keiichi Tanaka, Hideki Ichioka, Koji Fujiwara
  • Publication number: 20030117411
    Abstract: A texture mapping apparatus for jointing a plurality of texture images where mapping positions are partially overlapped so as to map the texture images on a surface of a three-dimensional model. The texture mapping apparatus has a texture cutting out section which extracts a boundary between a texture portion and a background portion for each of the texture images, a texture evaluating section which weights segments obtained by segmentalizing the texture portion correlatively with a distance from the boundary using boundary information obtained by the extraction of the boundary, and a texturing blending section which calculates a mapping value by means of weighted average for overlapped portions of the plural texture images.
    Type: Application
    Filed: December 19, 2002
    Publication date: June 26, 2003
    Applicant: Minolta Co., Ltd.
    Inventors: Koichi Fujiwara, Koji Fujiwara
  • Patent number: 6570551
    Abstract: As a method of driving a liquid crystal display device, the average voltage of reference line drive voltages Vcom for AC-driving a liquid crystal is set higher than the average voltage of signal line drive voltage V0. Moreover, when displaying a plurality of gray scales, the respective voltages are set so that the average voltage of the signal line drive voltages is lowered with a decrease in a voltage difference to be applied to the liquid crystal as an absolute value. In a liquid crystal display device of an opposing signal line structure, a high-quality image display is achieved by compensating for the non-symmetry of the transmissivity of the liquid crystal with respect to positive and negative drive voltages to prevent flickering and image persistence.
    Type: Grant
    Filed: June 12, 2002
    Date of Patent: May 27, 2003
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Naoto Inoue, Tomohiko Yamamoto, Keiichi Tanaka, Koji Fujiwara, Hideki Ichioka
  • Publication number: 20030080951
    Abstract: A display device is arranged in such a manner that rows on the screen on which pixel electrodes are provided in a matrix manner are sequentially selected so as to be scanned by scanning signal lines formed on a substrate, and a data signal is supplied from gray scale signal lines, which are formed on a counter substrate facing the substrate, to the pixel electrodes on the selected row, so that the display is carried out. Also, an idle period, (i) which is longer than a scanning period for scanning the screen once and (ii) during which period all scanning signal lines are in the state of non-scanning, is provided, and the scanning period and the idle period constitute one vertical period. With this arrangement, it is possible to (1) provide a driving method of a display device by which method the reduction of power consumption is sufficiently realized without causing the degradation of the display qualities, and (2) provide a display device using the same.
    Type: Application
    Filed: October 15, 2002
    Publication date: May 1, 2003
    Inventors: Koji Fujiwara, Tomohiko Yamamoto, Keiichi Tanaka, Naoto Inoue, Hideki Ichioka
  • Publication number: 20030067462
    Abstract: In order to simply generate an accurate three-dimensional shape model, the generating method has the step (#1) of arranging a three-dimensional shape model in an initial state in a virtual space, the step (#2) of projecting points on the three-dimensional shape model onto photographed images and specifying pixels on the respective photographed images corresponding to the points, the step (#3) of evaluating scattering of pixel values of the respective pixels on the photographed images corresponding to the points on the three-dimensional shape model, and the step (#4) of deforming the three-dimensional shape model so that the scattering of the pixel values of the respective pixels becomes small.
    Type: Application
    Filed: October 3, 2002
    Publication date: April 10, 2003
    Applicant: MINOLTA CO., LTD.
    Inventor: Koji Fujiwara
  • Publication number: 20030048261
    Abstract: Input position is accurately detected not depending on electrode scanning. In an x-detection period of a non-display period, a source drive circuit 3 simultaneously applies to all signal wiring lines a pulse of a peak value proportional to a distance from a gate drive circuit 2. A coordinate detection circuit 8 obtains an x-coordinate on the basis of a voltage induced at a pen 7 corresponding to the peak value (x-coordinate) of the applied pulse. In a y-detection period, a pulse generation circuit 5 applies one pulse to a common line. The pen 7 detects a potential variation in amplitude proportional to a distance (y-coordinate) from the source drive circuit 3, generated approximately simultaneously on all the signal wiring lines via a capacitance. The coordinate detection circuit 8 obtains the y-coordinate similarly to the case of x-coordinate detection. Thus, the input position is detected in a very short time scanning neither the scanning lines nor the signal wiring lines.
    Type: Application
    Filed: September 11, 2002
    Publication date: March 13, 2003
    Inventors: Tomohiko Yamamoto, Koji Fujiwara, Keiichi Tanaka, Naoto Inoue, Hideki Ichioka
  • Publication number: 20030034971
    Abstract: In order to provide a curved surface model generating technique which makes use of both advantages of a modeling method by using distance image data and a modeling method by using silhouette data while photographic and measurement data from less angles are utilized, firstly a curved surface model generating section inputs 2D color image data and distance image data. When silhouette image data are extracted from the 2D color image data, initial model data are generated by the Volume Intersection method or the like. The distance image data are converted into world coordinate values by using photographing position/posture data. In a fitting processing section, a fidelity where the distance with the distance image data is used as a measure and a fidelity where the distance with the silhouette image data is used as a measure are added to be evaluated, and a curved surface is fitted to initial model data so that curve surface model data are generated.
    Type: Application
    Filed: August 8, 2002
    Publication date: February 20, 2003
    Applicant: Minolta Co., Ltd.
    Inventors: Koji Fujiwara, Firo Fujii
  • Patent number: 6504521
    Abstract: As a method of driving a liquid crystal display device, the average voltage of reference line drive voltages Vcom for AC-driving a liquid crystal is set higher than the average voltage of signal line drive voltage V0. Moreover, when displaying a plurality of gray scales, the respective voltages are set so that the average voltage of the signal line drive voltages is lowered with a decrease in a voltage difference to be applied to the liquid crystal as an absolute value. In a liquid crystal display device of an opposing signal line structure, a high-quality image display is achieved by compensating for the non-symmetry of the transmissivity of the liquid crystal with respect to positive and negative drive voltages to prevent flickering and image persistence.
    Type: Grant
    Filed: October 1, 1999
    Date of Patent: January 7, 2003
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Naoto Inoue, Tomohiko Yamamoto, Keiichi Tanaka, Koji Fujiwara, Hideki Ichioka
  • Publication number: 20020190986
    Abstract: Disclosed herein are a method for generating volume data from images of an object viewed from diverse view points. This method comprises the steps of: (a) in each of discrete coordinate positions within a coordinate system for rendering a volume, obtaining a value corresponding to the distance to the boundary of a viewed volume defined by the contour of the image of said object and by the point of view of said image; and (b) in each of said coordinate positions, on the basis of a plurality of said values obtained for said images of said object, determining a value corresponding to the distance to the object surface and then maintaining said value in a manner corresponded to said coordinate position. In the method, multi-valued data can be assigned to each vertex or lattice point, and therefore, a small number of voxels can represent precisely the three-dimensional shape.
    Type: Application
    Filed: June 11, 2002
    Publication date: December 19, 2002
    Applicant: Minolta Co., Ltd.
    Inventors: Koichi Fujiwara, Koji Fujiwara
  • Publication number: 20020175994
    Abstract: The present invention provides a three-dimensional chart, a parameter acquiring method and an information processing device that are used for carrying out camera calibration in a wide range with high precision. For this reason, a plurality of unit graphic forms the sizes of which are coded by using different cross-ratios are placed on side faces of a three-dimensional chart. The cross-ratios of unit graphic forms are calculated from a picked-up image of the three-dimensional chart, and by collating these with actual values, the position and orientation of the image-pickup point are determined. The shifting average of the heights of the unit graphic forms is made approximately proportional to the distance from the apex so that it is possible to reduce the limitation of image-pickup distances. A movable camera is attached to a subject-use camera, and upon picking up an image of the subject, an image of the three-dimensional chart is also picked up simultaneously.
    Type: Application
    Filed: May 20, 2002
    Publication date: November 28, 2002
    Inventors: Kuniteru Sakakibara, Eiro Fujii, Koji Fujiwara
  • Publication number: 20020171615
    Abstract: As a method of driving a liquid crystal display device, the average voltage of reference line drive voltages Vcom for AC-driving a liquid crystal is set higher than the average voltage of signal line drive voltage V0. Moreover, when displaying a plurality of gray scales, the respective voltages are set so that the average voltage of the signal line drive voltages is lowered with a decrease in a voltage difference to be applied to the liquid crystal as an absolute value. In a liquid crystal display device of an opposing signal line structure, a high-quality image display is achieved by compensating for the non-symmetry of the transmissivity of the liquid crystal with respect to positive and negative drive voltages to prevent flickering and image persistence.
    Type: Application
    Filed: June 12, 2002
    Publication date: November 21, 2002
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Naoto Inoue, Tomohiko Yamamoto, Keiichi Tanaka, Koji Fujiwara, Hideki Ichioka
  • Publication number: 20020171797
    Abstract: A liquid crystal display device has a liquid crystal layer between a glass substrate and a counter substrate. A TFT and scanning lines which control the TFT are provided on the glass substrate. On the counter substrate, a gradation signal line which is connected to a counter electrode applying a voltage to the liquid crystal layer is provided opposite to the scanning lines. A sealing section for sealing the liquid crystal of the liquid crystal layer is provided while enclosing the display area between the glass substrate and the counter substrate. The sealing section has conductive particles. Upper contact pads connected to the gradation signal lines and lower contact pads on the glass substrate are electrically connected via the conductive particles. This realizes a liquid crystal display device with a smaller frame and makes the mounting compact in size without causing poor connection due to line breakage.
    Type: Application
    Filed: March 6, 2002
    Publication date: November 21, 2002
    Inventors: Hideki Ichioka, Tomohiko Yamamoto, Naoto Inoue, Keiichi Tanaka, Koji Fujiwara
  • Publication number: 20020158294
    Abstract: A solid state imaging device includes a semiconductor substrate, a light receiving section which is provided in a surface of the semiconductor substrate, and includes an array of pixels that accumulate electric charge through photoelectric conversion of incoming light, a light shielding section which includes an array of pixels formed in the surface of the semiconductor substrate and shielded from light, and a drain which is situated between the light receiving section and the light shielding section, and is formed to a depth deeper in the semiconductor substrate than the light receiving section and the light shielding section.
    Type: Application
    Filed: September 27, 2001
    Publication date: October 31, 2002
    Applicant: FUJITSU LIMITED
    Inventors: Koji Fujiwara, Iwao Sugiyama, Toshitaka Mizuguchi
  • Publication number: 20020150288
    Abstract: A method for processing image data and a modeling device are provided in which the total time necessary for performing area extraction of plural images can be shortened. The image data process, in which an object area corresponding to an object is extracted from plural images obtained by shooting the object from different eye points, comprises the steps of obtaining shoot condition data indicating the positional relationship between a camera and the object when plural object images are obtained and an optical parameter for image formation, and estimating the object area in one image in accordance with the object area extracted from another image and the shoot condition data for the other image.
    Type: Application
    Filed: February 6, 2002
    Publication date: October 17, 2002
    Applicant: Minolta Co., Ltd.
    Inventor: Koji Fujiwara