Patents Represented by Attorney Kevin J. Fournier
  • Patent number: 5539523
    Abstract: Any specific color (e.g., flesh-color, sky-blue and so on) is determined for its area on an original color image and corrected by the use of a matrix color correcting factor to assure a high level of reproduction of that color. Any specific color, for example flesh color, is previously extracted by pre-scanning (S1, S2). An area of the color is determined by counting its pixels included therein (S3). The determined area S of the specific color is compared with a given value C (S4). When S<C, a usual color correction is made (S6). When S>C, another kind of color correction is made (S9, S10). An area of each color is extracted (S9) and a suitable correction factor is selected (S10). All colors are separately corrected by using respectively selected correction factors, that assures a high-quality reproduction of the color image to be printed.
    Type: Grant
    Filed: September 22, 1993
    Date of Patent: July 23, 1996
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yoshiyuki Nakai, Tuyoshi Takeno
  • Patent number: 5539522
    Abstract: A color copying machine has a color correcting circuit. The color correcting circuit includes a device for generating reference pattern data on each color, a device for printing the reference pattern data generated by the generating device, a device for reading a printed result of the reference pattern data printed by the printing device, a device for measuring a color reproduction error based on the reference pattern data generated by the generating device and the printed result of the reference pattern data read by the reading device, and a device for calculating a color correction coefficient of each color based on the color reproduction error measured by the measuring device.
    Type: Grant
    Filed: October 27, 1992
    Date of Patent: July 23, 1996
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Yasuhiro Yoshida
  • Patent number: 5538905
    Abstract: A method for forming a transparent conductive film includes the steps of: forming an ITO film on a substrate by sputtering a target including oxygen atoms, indium atoms, and tin atoms under an inert gas atmosphere; patterning the ITO film by selectively removing a prescribed portion of the ITO film using an etching method; and doping the patterned ITO film with oxygen using an ion shower doping method, thereby forming the transparent conductive film from the ITO film.
    Type: Grant
    Filed: October 20, 1993
    Date of Patent: July 23, 1996
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yukiya Nishioka, Yukinobu Nakata, Hidenori Negoto, Yoshinori Shimada, Takehisa Sakurai, Mikio Katayama
  • Patent number: 5537237
    Abstract: A ferroelectric liquid crystal display device includes a pair of substrates on which an electrode is selectively formed on the surface, an insulating film and an orientation film are formed thereon and uniaxial orientation processing is performed and which are arranged so that directions of their uniaxial orientation processing may be almost parallel to each other; a liquid crystal panel which is formed by injecting a liquid crystal having a chiral smectic C phase between the substrates; a driving means for switching an optical axis of the liquid crystal by selectively applying a voltage to the electrode; and a means for optically identifying the switching of the optical axis, in which the liquid crystal shows a chevron structure as a layer structure at the chiral smectic C phase in which a layer structure is doglegged, and an orientation region generated from interaction in the uniaxial orientation processing direction and the layer structure is an inside region surrounded by a lightning defect generated in
    Type: Grant
    Filed: January 9, 1995
    Date of Patent: July 16, 1996
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Nobuyuki Itoh
  • Patent number: 5537129
    Abstract: A common electrode driving circuit for use in a display apparatus including a first substrate; a second substrate opposed to the first substrate with a display medium interposed therebetween; a plurality of pixel electrodes, a plurality of common electrode driving terminals provided on a surface of the first substrate opposed to the second substrate; and at least one common electrode provided on a surface of the second substrate opposed to the first substrate. The common electrode is opposed to the plurality of pixel electrodes and is connected to the plurality of common electrode driving terminals respectively through a plurality of common electrode transfer resistances.
    Type: Grant
    Filed: December 23, 1993
    Date of Patent: July 16, 1996
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hisao Okada, Tadatsugu Nishitani, Yuji Yamamoto, Takeshi Takarada
  • Patent number: 5535180
    Abstract: A magneto-optical recording and readout method involves making a tape-type magneto-optical recording medium run in front of at least a single pole of a permanent magnet or an electromagnet at a position forwards of an optical head relative to the running direction of the recording medium, without contacting the magnet so as to cross at a substantial right angle to magnetic force lines, thereby initializing the recording medium or erasing information therein. The tape-type magneto-optical recording medium has at least a magneto-optical recording layer on one side of a base film having a thickness of not more than 50 .mu.m. Recording of information is effected by irradiating beams to the recording medium under application of an external magnetic field of not more than 24 kA/m.
    Type: Grant
    Filed: December 5, 1994
    Date of Patent: July 9, 1996
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Takumi Shimamori, Naoyuki Uchida
  • Patent number: 5534820
    Abstract: In signal processing circuitry using active devices, non-linearity of the device causes distortion of pure tones and the generation of intermodulation products for more complex signals. The transfer characteristics of such active devices may be considered as the accumulated characteristics of input and output filter stages separated by a non-linear region. To compensate for non-linearities and reduce intermodulation products, a drive circuit comprises pre- and post-correction filters separated by a compensating amplifier. The frequency response of the pre-correction filter corresponds to that of the input filter stage but is reversed in the frequency spectrum; with conventional I.F. the transfer characteristic of the amplifier and frequency response characteristic of the post-correction filter are the respective complements, of those of the non-linear region and pre-correction filter.
    Type: Grant
    Filed: December 16, 1994
    Date of Patent: July 9, 1996
    Assignee: British Broadcasting Corporation
    Inventors: George I. F. Tupper, Anthony C. Allegranza, Phillip J. Doherty
  • Patent number: 5535026
    Abstract: A liquid crystal display device includes a pair of substrates provided with electrodes, at least one of the substrates being transparent, a liquid crystal region and a polymeric wall surrounding the liquid crystal region, the liquid crystal region and the polymeric wall being interposed between the pair of substrates.
    Type: Grant
    Filed: July 19, 1995
    Date of Patent: July 9, 1996
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Koichi Fujimori, Shinji Yamagishi, Tokihiko Shinomiya
  • Patent number: 5535010
    Abstract: A portable image processing apparatus includes a sheet holding section formed so as to have a substantially cylindrical shape, a holding roller for cylindrically holding a sheet along a side of the sheet holding section, a sheet carrying section with a doughnut-like shape, a printing section fixed in an opposite position to the side of the sheet holding section, a stepping motor for scanning for rotating the sheet holding section which holds a sheet on an axis of a cylinder, and a stepping motor for carrying for rotating the sheet carrying section from its inner circumference towards its outer circumference in order to transfer the sheet parallel to the axis of the sheet holding section. As a result, the apparatus is miniaturized, thereby making it possible to improve its portability.
    Type: Grant
    Filed: June 30, 1995
    Date of Patent: July 9, 1996
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hirokazu Izumi, Masanobu Deguchi, Koji Oku, Shuuhei Yamamoto, Harumi Katayama
  • Patent number: 5534886
    Abstract: Displacement between an actual designation position designated by a detection pen and a detection coordinates is corrected. A correction calculation section includes a plurality of processing mode determination modules, a propagation delay correction module, an inward displacement correction module, a waveform distortion correction module, and a periodical fluctuation correction module. The processing mode determination module determines a correction module according to a detection coordinate value input. Each of the correction modules includes a correction formula or a lookup table inherent to each area. According to the correction formula or the lookup table, input detection coordinate value is corrected to thereby correct the displacement between the actual designation position and the detection coordinate value.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: July 9, 1996
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Toshio Nomura, Takao Tagawa, Noritoshi Kako
  • Patent number: 5528351
    Abstract: An elastically-deformable heat-resistant belt is made in the form of a cylinder made of nickel, which accommodates therein a heater lamp and a reflecting plate for concentrically directing radiant heat from the heater lamp to the vicinity of an area wherein the cylinder-like belt comes into contact with a recording paper sheet carrying a toner image. When the recording paper is transferred along a guide plate, the driving roller rotates the heat-resistant belt in contact with the recording paper. At this time, the rotating belt and the guide plate are pressed against each other and, furthermore, the movable guide plate is further pushed toward the belt by rotation of an eccentric cam with an operating lever to vary the pressed condition of the belt to form a flat surface of a paper transferring portion with a variable nip width therebetween.
    Type: Grant
    Filed: July 26, 1995
    Date of Patent: June 18, 1996
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Masaru Tsuji
  • Patent number: 5527634
    Abstract: The invention provides fuel cells and fuel cell stacks having a plurality of manifolds for providing reactive gases to cell layers. The manifolds are distributed across the planar area of the cells whereby the flow path lengths are reduced to the point that current collectors are not required. Substantial stack volume, cost and contact resistance reductions are also realized.
    Type: Grant
    Filed: October 12, 1994
    Date of Patent: June 18, 1996
    Assignee: Electric Power Research Institute, Inc.
    Inventor: G. B. Kirby Meacham
  • Patent number: 5523608
    Abstract: A peripheral IC 6 for a solid state imaging device is mounted on an island 7 of a lead frame and thereafter covered and sealed by a molding resin, thus forming a premolded package 2. Subsequently, a solid state image sensor 1 is mounted on the island 7 on one side thereof facing an opening. Thereafter, for protection of the solid state image sensor 1, a transparent lid 11 is attached to the premolded package 2 by adhesive. As a result, packaging area can be reduced in mounting the solid state image sensor on a packaging substrate, allowing video equipment such as video cameras to be miniaturized.
    Type: Grant
    Filed: October 3, 1994
    Date of Patent: June 4, 1996
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kouki Kitaoka, Takamichi Maeda, Shozo Minamide
  • Patent number: 5521383
    Abstract: A corona discharge device includes a plurality of discharge electrodes each having a pointed tip for concentrating electric field, a plurality of resistors and a common electrode, each of the plurality of resistors connects corresponding one of the plurality of discharge electrodes to the common electrode, and causes a prescribed voltage drop within a range of from 200 V to 2000 V.
    Type: Grant
    Filed: June 14, 1994
    Date of Patent: May 28, 1996
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kazuhiko Furukawa, Toshiaki Kagawa, Syogo Yokota, Hiroyuki Sawai, Toshihiro Tamura, Hiroshi Ishii
  • Patent number: 5519533
    Abstract: There is reproduced a three-dimensional image in which there is no dimness or no cross talk and which is light and high in resolution, by a three-dimensional information reproducing apparatus comprising a liquid crystal panel for displaying a discrete Fourier transform image, a light source array which is disposed to the rear of the liquid crystal panel and which emits parallel light, and a synchronous control device for switching, with time division, the discrete Fourier transform image that is displayed in the liquid crystal panel and also an angle of the parallel light that is emitted from the source light array.
    Type: Grant
    Filed: February 28, 1995
    Date of Patent: May 21, 1996
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Toshio Nomura, Masayuki Katagiri, Noritoshi Kako
  • Patent number: 5512950
    Abstract: An object of the invention is to provide a solid state imager device in which an electronic shutter function is provided and charges never overflow a light receiving portion even when the light with a high intensity enters thereinto and to provide the driving method thereof. In the solid state imager device and the driving method, an electronic shutter operation is conducted by sweeping out the charges in the light receiving portion by applying a predetermined voltage to a substrate, and the voltage application period is within a horizontal blanking period when an effective exposure period of the electronic shutter exceeds a vertical blanking period and the voltage application period covers an effective horizontal scanning period when the effective exposure period is within the vertical blanking period.
    Type: Grant
    Filed: August 10, 1994
    Date of Patent: April 30, 1996
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takashi Watanabe, Akihira Tokuno
  • Patent number: 5508536
    Abstract: The present invention provides a heterojunction bipolar transister includes: a collector layer, a base layer, an emitter layer, a transition layer formed between the base layer and the emitter layer, a collector electrode connected to the collector layer, a base electrode connected to the base layer, and an emitter electrode connected to the emitter layer, wherein the emitter layer and the transition layer are formed of a composition including elements forming the base layer and at least one element different from the elements forming the base layer, a composition of the different element in the transition layer at the emitter side is substantially equal to that of the emitter layer, a composition of the different element in the transition layer at the base side is smaller than that of the emitter side and varies abruptly towards the base layer, and the composition of the transition layer gradingly varies from the base side to the emitter side.
    Type: Grant
    Filed: April 7, 1994
    Date of Patent: April 16, 1996
    Assignee: Sharp Kabushiki Kaisha
    Inventors: John K. Twynam, Katsuhiko Kishimoto, Toshiaki Kinosada
  • Patent number: 5506706
    Abstract: A phase difference plate capable of eliminating contrast changes due to viewing angle changes of display image, coloring phenomenon of display screen, and black and white reversal phenomenon, and a liquid crystal display device capable of displaying images of high quality are presented. A phase difference plate is a drawn and elongated material possessing optical anisotropy such as high polymer compound formed in a flat plate form, and the direction of the minimum principal refractive index na of the three principal refractive indices na, nb, nc of the index ellipsoid is parallel to the y-axis direction, and the direction of the principal refractive index nb is inclined to the normal direction of the surface.
    Type: Grant
    Filed: June 18, 1993
    Date of Patent: April 9, 1996
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Motohiro Yamahara, Kei Sasaki, Teruyoshi Hara, Shuichi Kohzaki
  • Patent number: 5504602
    Abstract: A projection apparatus for holographic stereogram recording has a transmissive liquid crystal device and a diffusion screen. The transmissive liquid crystal device has a microlens array on its incident side and a polarizing sheet on its transmitting side. The microlenses are in one to one correspondence with the pixels of the liquid crystal device. The position of the diffusion screen is chosen such that the image transmitted to it from the liquid crystal device appears continuous.
    Type: Grant
    Filed: October 8, 1993
    Date of Patent: April 2, 1996
    Assignee: Sharp Kabushiki Kaisha
    Inventor: William J. Farmer
  • Patent number: 5502482
    Abstract: Studio camera position and motion may be derived from the camera image by separating out the background and deriving from a background having a number of areas of hue and/or brightness different from adjacent areas estimates of movement from one image to the next. The initial image is used as a reference and amended with predicted motion value. The amended image is compared with incoming images and the result used to derive translation and scale change information. Once the proportion of the reference image contained in an incoming image falls below a threshold a fresh reference image is adopted.
    Type: Grant
    Filed: April 15, 1994
    Date of Patent: March 26, 1996
    Assignee: British Broadcasting Corporation
    Inventor: Alexander T. Graham