Patents Represented by Attorney Richard E. Gamache
  • Patent number: 6097410
    Abstract: An image forming apparatus includes an ink tank accommodating chargeable developer ink, an ink control layer having a plurality of ink supply holes arranged in a matrix, arranged near the surface of the developer ink and having a lower portion opened in the developer ink, a potential control layer arranged above the ink control layer and having a plurality of ink passage holes arranged in the column direction of the ink supply holes, an opposing electrode arranged opposing to the potential control layer, a power supply unit for applying a potential to the developer ink and an opposing electrode to generate a prescribed potential difference between the developer ink and an opposing electrode, a surface level controller for changing surface level of the developer ink in the ink supply holes for each column of the ink supply holes, and an emission controller for controlling potential of each row of the ink supply holes in the ink passage holes of the potential control layer for controlling ink emission dot by do
    Type: Grant
    Filed: August 25, 1998
    Date of Patent: August 1, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hideo Yamasa, Kouichi Irihara
  • Patent number: 6081353
    Abstract: A color image processing device includes color conversion means for outputting color adjusted signals having been chromatically adjusted in accordance with the input of separated color signals obtained from a scanner and a variable factor signal other than color signals. The color conversion means includes a memory device for discretely storing only the color adjusted signals that correspond to predetermined separated color signals and a predetermined variable factor signal, and color adjusting means for, when the inputted separated color signal or the inputted variable factor signal directly corresponds to none of the color adjusted signals stored in the memory means, outputting color adjusted signals having been interpolated in accordance with the known color adjusted signals found in a neighborhood of the inputted separated color signals and variable factor signal.
    Type: Grant
    Filed: March 23, 1998
    Date of Patent: June 27, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tatsuya Tanaka, Makio Gotoh, Yoshinori Murakami
  • Patent number: 6078808
    Abstract: According to a conventional pager generally avalable, mere characters and symbols can be transmitted and received. In addition thereto, since code sets that can be transmitted and received are limited, data other than messages can not be transmitted and received. However, information management section of the present invention, when transmitting and receiving of data, such as schedule data, including codes other than the code sets, the data should be converted into data in a form of message before carrying out the tranmitting and receiving. Therefore, it is possible to transmit and receive a variety of data prepared in a form other than in a form of message. When transmitting of data, only the part that has been changed is transmitted while the information management section of the addressee changes only the part corresponding to the data that has been changed, i.e., the unchanged parts of the file are not changed. Therefore, it is possible to update data with remarkably little communication amount.
    Type: Grant
    Filed: June 19, 1997
    Date of Patent: June 20, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hiroshi Fukutomi, Yu Matsumoto, Yusuke Miyata
  • Patent number: 6065094
    Abstract: A compressed data storage apparatus is provided with a compressing circuit for generating compressed data by compressing digital data from a camera section, a buffer memory for storing the compressed data temporarily, a disk device for storing the compressed data stored in the buffer memory at a rate faster than a rate at which the buffer memory stores the compressed data, and a system controller for increasing a compression ratio of the compressing circuit when detecting that the disk device has become unable to record the data. According to the above arrangement, in the event that the disk device becomes unable to store the data due to vibrations or an impact, the data compression ratio is increased, whereby the rate at which the buffer memory stores the data is reduced. Consequently, the capacity of the buffer memory can be reduced, and therefore, it has become possible to provide an inexpensive compressed data storage apparatus with excellent resistance to vibrations.
    Type: Grant
    Filed: July 25, 1997
    Date of Patent: May 16, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Jun Akiyama
  • Patent number: 6057038
    Abstract: A switching element is formed by sequentially depositing on an insulating substrate a gate electrode, a gate insulating film made of an inorganic insulating film, a semiconductor layer, a channel protecting layer, an n.sup.+ Si layer that will form a source electrode and a drain electrode. Next, a metal layer and a transparent conductive film are formed on edges of the source electrode and the drain electrode. The insulating substrate on which the above films have been deposited is cleaned with vacuum ultraviolet light, before further depositing an interlayer insulating film and a pixel electrode. A substrate for use in a display element obtained in this manner exhibits an excellent adhesion strength between the film processed with vacuum ultraviolet light and a film adjacent to the film processed with vacuum ultraviolet light.
    Type: Grant
    Filed: July 22, 1997
    Date of Patent: May 2, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Shin-ichi Terashita, Shinji Yamagishi
  • Patent number: 6039435
    Abstract: An image forming unit having a toner supplying section and a printing section, causes the toner supported on a toner support to jump and pass through gates so that the toner adheres to the paper being conveyed from the paper cassette, thus forming an image directly on the paper. In this arrangement, when the value as to a certain image-quality indicator for the image which is to be formed, differs from the value for the image which is a predicated, actually formed image, by the predetermined amount, the image data is restructured so that the desired image can be obtained.
    Type: Grant
    Filed: September 1, 1998
    Date of Patent: March 21, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Shirou Wakahara
  • Patent number: 6038412
    Abstract: An image fixing device is disclosed comprising a heating roll installed with a heater, a pressure roll rotatably pressing against the heating roll, and a thermistor for sensing the surface temperature of the heating roll, wherein a CPU is provided for controlling the surface temperature of the heating roll to an initial fixing control temperature of 1.1 times a normal fixing temperature, when the surface temperature of the heating roll sensed by the thermistor is below one-third of the normal fixing temperature.
    Type: Grant
    Filed: March 20, 1998
    Date of Patent: March 14, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Shinichiro Hiraoka
  • Patent number: 6037939
    Abstract: A method for enabling a user to interactively manipulate data retained in a computer system includes the steps of: comparing a variable value with a predetermined threshold value, the variable value varying in accordance with a predetermined instruction which is input to the computer system; selecting one of a plurality of interaction tools in accordance with the result of comparison of the variable value with the predetermined threshold value, each of the plurality of interaction tools providing a different method for manipulating the same data; and displaying the selected one of the plurality of interaction tools.
    Type: Grant
    Filed: September 27, 1996
    Date of Patent: March 14, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kouichi Kashiwagi, Mitsuru Minakuchi, Toshiyuki Masui
  • Patent number: 6035156
    Abstract: An image processing apparatus reads and processes images on the documents successively presented to an original image reading section by means of an ADF. The operation of the image processing apparatus is controlled by a control section provided therein. The control section creates a management table for each document for storing processing information related to a document reading action, and manages the documents based on the content of the management tables. Consequently, the image processing apparatus can readily and precisely carry out the recovery when the documents or sheets are jammed.
    Type: Grant
    Filed: November 3, 1998
    Date of Patent: March 7, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yuji Okamoto, Shuhji Fujii, Yuji Nakagawa
  • Patent number: 6034702
    Abstract: When a character of a basic font to be used for character formation and a font to be applied to the character are designated through a key board, an element shape recognizing unit and a regular shape recognizing unit select component piece data to be used, among those stored in an element portion pasting-use component piece data storing unit and a regular shape portion pasting-use component piece data storing unit, in accordance with the information thus supplied. The element shape recognizing unit and the regular shape recognizing unit detect target portions to which component pieces are to be pasted, among the portions of the character of the basic font which was designated through the key board. The character data synthesizing unit pastes the component pieces thus selected to the target portions thus detected by the element shape recognizing unit and the regular shape recognizing unit so as to synthesize the character data.
    Type: Grant
    Filed: April 29, 1997
    Date of Patent: March 7, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yuka Yabuuchi, Susumu Hasegawa
  • Patent number: 6018282
    Abstract: The voltage-controlled variable-passband filter in accordance with the present invention is structured so that conductive patterns, R, L, and C, and other circuit elements are embedded in a ceramic substrate. Within this substrate is also embedded an insulating layer made of the same ceramic material, the capacitance of which changes in response to an electric field applied thereto. On one surface of the insulating layer is provided a control electrode, and on the other surface are provided adjacent to one another a resonator pattern, to which high-frequency signals are applied, and a ground pattern. Accordingly, two capacitors connected in series are formed between the resonator pattern and the ground pattern, and the capacitance of these series capacitors can be adjusted by an integrated circuit mounted on the ceramic substrate, thus reducing size and weight, and simplifying adjustment.
    Type: Grant
    Filed: November 6, 1997
    Date of Patent: January 25, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Yoichi Tsuda
  • Patent number: 6014354
    Abstract: A farfield pattern which occurs when a light spot passes through a pit on a disk is applied as two-phase pulses to a pulse issuing portion through photo detectors, current-voltage converters and binarizing circuits. The pulse issuing portion issues, to a difference detector, pulses corresponding to the two-phase pulses, respectively, and each having a time width starting from the time point of level change of one of the two-phase pulses and terminating at earlier one between the time point of return of the one pulse to the initial level and the time point of change in the other binary signal and the time point of level change of the other pulse. The difference detector applies a phase difference pulse corresponding to the two pulses applied thereto to a LPF. The phase difference pulse converted into an analog signal by the LPF is issued as a tracking error signal.
    Type: Grant
    Filed: November 3, 1997
    Date of Patent: January 11, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masaru Nomura, Takeshi Yamaguchi
  • Patent number: 6009011
    Abstract: A non-volatile memory includes: at least one memory cell including one non-volatile memory transistor and one capacitor; the non-volatile memory transistor being composed of a first dielectric film, a floating gate, a second dielectric film and a control gate sequentially laminated on a semiconductor substrate, and source/drain diffusion layers formed in the semiconductor substrate; the capacitor being composed of a capacitor dielectric film sandwiched between two electrodes, one of the electrodes being connected to the source diffusion layer of the non-volatile memory transistor; and an injecting/drawing means for injecting/drawing electrons from the drain diffusion layer to the floating gate by use of a tunnel current.
    Type: Grant
    Filed: December 24, 1997
    Date of Patent: December 28, 1999
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Yoshimitsu Yamauchi
  • Patent number: 6000864
    Abstract: A print control method capable of reducing power consumption of an information apparatus is performed between the information apparatus for transmitting print data and a printer receiving the print data for image forming in accordance with the print data which are connected by wireless communication. The print control method includes the steps of: calculating a first period of time it takes before it becomes ready to receive the print data by the printer; notifying the information apparatus of the first period of time by the printer; determining if the first period of time is elapsed by the information apparatus; and transmitting the print data to the printer by the information apparatus when the first period of time is elapsed. It is noted that a printing system using the print control method is also claimed.
    Type: Grant
    Filed: September 9, 1998
    Date of Patent: December 14, 1999
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Keitaro Hanada
  • Patent number: 5990924
    Abstract: For input image data (`A`) before conversion, each pixel is converted into N (=3) parts. In this case, the three sub-pixels of data corresponding to a recording pixel (black pixel) are converted into recording sub-pixels on both sides of the three (`B`). This eliminates the density variation within a single pixel. Therefore, it is possible to reduce the dot spacing at slanted area, for example, and hence eliminate jaggies, providing a reproduced image easily recognized.
    Type: Grant
    Filed: July 16, 1997
    Date of Patent: November 23, 1999
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Eiichi Kido, Yuhi Yui, Shigeyuki Wakada, Toshihide Ohgoshi, Satoshi Murakami, Takahiro Kawakami
  • Patent number: 5989705
    Abstract: A magneto-optical recording disk includes a recording layer for recording information as a mark and a reproduction layer, laminated with the recording layer, to which magnetization direction of the recording layer is transferred at high temperatures, wherein the reproduction layer and the recording layer are magnetostatically coupled and are not exchange-coupled. The information is read out by using a temperature distribution generated by a light beam for reproduction. The recording layer has, on a side thereof to which the reproduction layer is not provided, a supplementary back layer of a soft magnetic material composed of ferromagnetic material. The magneto-optical disk is designed to generate good CNR and thereby improves recording density even when a short mark is reproduced.
    Type: Grant
    Filed: November 14, 1996
    Date of Patent: November 23, 1999
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Junsaku Nakajima, Yoshiteru Murakami, Akira Takahashi, Junji Hirokane
  • Patent number: 5981902
    Abstract: A texturing apparatus for applying a texturing to a magnetic recording medium, such as a magnetic disk including a hard drive. A substrate such as a magnetic disk is held by a substrate rotating system, which is capable of rotating the substrate. A movable laser beam source including an electro-optic modulation circuit directs a laser beam through a focusing element onto the surface of the substrate. The modulation circuit allows the laser beam to pulse at a frequency from 0.1 to 100 MHz. The focusing element allows a laser beam spot diameter of 0.2 to 4 .mu.m on the surface of the substrate. This texturing includes texturing the magnetic head contact start and stop (CSS) area of hard disks.
    Type: Grant
    Filed: December 14, 1995
    Date of Patent: November 9, 1999
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Yoji Arita, Yuzo Seo, Toshihiko Kuriyama, Ryuichi Yoshiyama
  • Patent number: 5938780
    Abstract: A method for operating automatic test equipment for capturing digital data produced by a semiconductor device under test, whereby the digital data is repetitively sampled to produce a series of sampled data pairs. The digital data and the sampling frequency can be non-coherent. As a result, the digital data can be sampled early relative to some bits and late relative to other bits. The sampled data pairs that are captured while these shifts take place, from early-to-late sampling or from late-to-early sampling, are then assigned to respective groups. A minimum number of bit patterns, corresponding to the sampled digital data, is then derived from contiguous groups of sampled data pairs, and compared with expected bit patterns. The method is especially useful for capturing digital data with drifting frequency.
    Type: Grant
    Filed: September 19, 1997
    Date of Patent: August 17, 1999
    Assignee: Teradyne, Inc.
    Inventor: Michael C. Panis
  • Patent number: 5929628
    Abstract: An electronic circuit tester, having an amplitude calibration feature, for accurately measuring signals produced by an electronic device under test, including a plurality of channels, data acquisition circuitry, an internal calibration source, and a digital filter. The internal calibration source is calibrated to a known standard. The tester then uses the internal calibration source to measure a signal amplitude error introduced by the channels and data acquisition circuitry. Next, the digital filter is automatically adjusted to correct the signal amplitude error, thereby presenting corrected data samples to a test computer for subsequent analysis.
    Type: Grant
    Filed: December 5, 1996
    Date of Patent: July 27, 1999
    Assignee: Teradyne, Inc.
    Inventors: James H. Becker, Kenneth F. Coop
  • Patent number: 5930787
    Abstract: An information processing apparatus includes: an input device for receiving input information; a display device for displaying information on a display screen; and a database for storing words and information related to the words to allow information related to a related word related to an input word be retrieved.
    Type: Grant
    Filed: September 27, 1996
    Date of Patent: July 27, 1999
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Mitsuru Minakuchi, Koichi Kashiwagi, Toshiyuki Masui