Patents Represented by Attorney Robert F. O'Connell
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Patent number: 5283477Abstract: A common driver circuit for driving a load heavy in a capacitive property such as a common electrode or the like of a liquid crystal panel is composed of the simple circuit construction provided with each circuit of the voltage follower, the low-pass filter, the feedback, the control so that the variation in the direction current component which gives bad influences in the processing of the signals of this type of circuit is restrained to improve the reliability, and the direct current is not required to be cut to eliminate the direct current cutting capacitor of the large capacity.Type: GrantFiled: March 13, 1992Date of Patent: February 1, 1994Assignee: Sharp Kabushiki KaishaInventor: Takeshi Shibata
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Patent number: 5280374Abstract: A liquid crystal display device and a method of compensating for a luminance point defect of the liquid crystal display device. After a detective luminance point pixel is detected, a laser beam is irradiated from an excimer laser oscillator on a portion of a surface of one of glass substrates of a liquid crystal panel on which an illuminating light is incident, the portion being located on the same irradiation path of the illuminating light with the luminance point pixel. In this way, the portion is laseretched, thereby forming a rough surface in the portion. When such a panel is used in a projection device, the light transmitted through the luminance point pixel is scattered and so reduced. Accordingly, the defective luminance point pixel is inconspicuous to normal pixels around the defective luminance point pixel.Type: GrantFiled: February 28, 1992Date of Patent: January 18, 1994Assignee: Sharp Kabushiki KaishaInventors: Shunji Nakai, Toshio Maeda, Yasuo Mizokoshi
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Patent number: 5274483Abstract: A liquid crystal display including first and second translucent substrates opposed to each other, first and second transparent electrodes formed on the opposite faces of the first and second substrates, orientation films formed on the opposite faces so as to cover the first and second transparent electrodes, a liquid crystal filled in a space between the orientation films, the first electrode being divided into a plurality of dot electrodes arranged in the row and column directions, and the second electrode being divided into a plurality of stripe electrodes arranged opposite to the dot electrodes of the first electrode in the row direction, a first conductive film for serially connecting the dot electrodes in each column, and a second conductive film provided along the longitudinal edge of the stripe electrode, wherein the first and second substrates are positionally set such that the second conductive film is opposed to concave portions formed between the dot electrodes in the row direction.Type: GrantFiled: January 14, 1992Date of Patent: December 28, 1993Assignee: Sharp Kabushiki KaishaInventor: Nobuyuki Itoh
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Patent number: 5272537Abstract: In a solid state imaging device, a horizontal transfer unit has first and second transfer paths which are disposed in parallel and in which the transfer direction of image signals is changed according to the mode of a driving signal applied to the paths. One end of the first transfer paths is connected to one end of the second transfer path through a third transfer path. When a driving signal of a first mode is applied, the first path transfers image signals from the one end to the other end to output normal image signals. When a driving signal of a second mode is applied, the first path transfers image signals from the other end to the one end to transfer the image signals to the second transfer path via the third transfer path, and the second transfer path transfers image signals from the one end to the other end to output mirror image signals.Type: GrantFiled: July 31, 1991Date of Patent: December 21, 1993Assignee: Sharp Kabushiki KaishaInventor: Takashi Watanabe
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Patent number: 5270558Abstract: A charge-coupled device having an array of pixel elements formed in a substrate, which device is operable in a first state to expand the depletion well regions of each pixel element into the substrate for storing incoming photoelectrons therein and in a second state to contract the expanded depletion well regions to prevent storage of photoelectrons in the contracted depletion well regions.Type: GrantFiled: March 1, 1993Date of Patent: December 14, 1993Assignee: Massachusetts Institute of TechnologyInventors: Robert K. Reich, Bernard Kosicki, Eugene D. Savoye
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Patent number: 5268927Abstract: A digital adaptive transversal filter includes an interface circuit for regulating and digitizing analog input signals, which comprise of multiple spread-spectrum signals, additive thermal noise and additive multiple narrowband interferers, to provide multi-bit digital input signals. A digital finite impulse response filter having a set of variable digital weight coefficients responds to the multi-bit digital input signals to generate digital output signals which contain a reduced amount of narrowband interference. A digital weight generator responds to the digital input and digital output signals for updating the digital weight coefficients, and a reset generator periodically resets the digital weight coefficients to zero initial values.In a preferred embodiment an 8-tap, 8-bit digital adaptive transversal filter operating at 22 MHz was implemented with discrete components and a processing gain of 30 dB was demonstrated.Type: GrantFiled: October 6, 1992Date of Patent: December 7, 1993Assignee: Mayflower Communications Company, Inc.Inventors: George Dimos, Triveni N. Upadhyay
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Patent number: 5269016Abstract: A fault tolerant data processing system which provides single fault Byzantine resilience which system uses a number of fault containment regions each of which includes at least one processing element. The fault containment regions of the system are arranged to utilize a shared memory, each of such regions including a portion of the shared memory. The shared memory portion of each fault containment region provides communication with the shared memory portions of each of the other fault containment regions. A shared memory portion includes an encoder for encoding a data byte from the processor in the region into a number of data byte symbols from which the data byte can be reconstructed. The data byte symbols can be stored in the shared memory portion of the region and can be transmitted to one or more of the shared memory portions of the other fault containment regions.Type: GrantFiled: September 24, 1990Date of Patent: December 7, 1993Assignee: Charles Stark Draper Laboratory, Inc.Inventors: Bryan P. Butler, Richard E. Harper
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Patent number: 5268665Abstract: A resistor device for blower motor comprising one plate of PTC element having two side surfaces and a plurality of electrodes disposed on at least one of the two side surfaces. A plurality of different resistance values can be obtained from the one plate of PTC element, which makes it possible to realize a small and compact structure for the resistor device.Type: GrantFiled: November 20, 1991Date of Patent: December 7, 1993Assignee: Pacific Engineering Co., Ltd.Inventor: Murakami Iwao
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Patent number: 5267049Abstract: An image quality adjusting apparatus provided for a copying machine having a capability of adjusting copied image quality of an original, includes a unit for reading image data, a first storing unit for storing image data of the original read by the reading unit, a second storing unit for storing image data of a copied sheet read by the reading unit, the copied sheet being copied by the copying machine, and a unit for deriving correction data by means of comparing the original image data stored in the first storing unit with the copied sheet image data stored in the second storing unit, and amending the original image data on the basis of the derived correction data.Type: GrantFiled: February 25, 1992Date of Patent: November 30, 1993Assignee: Sharp Kabushiki KaishaInventor: Kazushi Yamamoto
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Patent number: 5265671Abstract: An apparatus is disclosed for projecting a stiffly flexible conduit or cable through a bore of a tube to be cleaned, surveyed or otherwise processed, said apparatus comprising a drum enabling the conduit or cable to be stored therein in a plurality of wound coils with a distal or free end of the conduit or cable to be projected from the apparatus and into the bore of the tube to be cleaned, surveyed or the like, the drum being mounted for simultaneous axial and rotary motion and drive means being provided to effect the axial and rotary motion of the drum, restraining means being provided to prevent radial expansion of the wound coils on the drum.Type: GrantFiled: December 4, 1991Date of Patent: November 30, 1993Assignee: Barry Brothers Specialised ServiceInventor: Robert W. Vowles
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Patent number: 5266098Abstract: A process for producing charged uniformly sized metal droplets in which a quantity of metal is placed in a container and liquified, the container having a plurality of orifices to permit passage of the liquified metal therethrough. The liquified metal is vibrated in the container. The vibrating liquified metal is forced through the orifices, the vibration causing the liquified metal to form uniformly sized metal droplets. A charge is placed on the liquified metal either when it is in the container or after the liquified metal exits the container, the charging thereof causing the droplets to maintain their uniform size. The uniformly sized droplets can be used to coat a substrate with the liquified metal.Type: GrantFiled: January 7, 1992Date of Patent: November 30, 1993Assignee: Massachusetts Institute of TechnologyInventors: Jung-Hoon Chun, Christian H. Passow
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Patent number: 5267333Abstract: An image compressing apparatus forms a synthetic image from a plurality of image data. The apparatus includes a device for sorting a plurality of image data into a plurality of image types in accordance with at least one of a nature and a use of each image data, a device for selecting an image compressing method out of a plurality of predetermined various image compressing methods for each image data in accordance with the sorted image type, and a device for compressing the image data in accordance with the selected image compressing method and recording the compressed image data in a recording medium.Type: GrantFiled: December 21, 1992Date of Patent: November 30, 1993Assignee: Sharp Kabushiki KaishaInventors: Tomoko Aono, Hiroyuki Katata, Masaki Takakura, Yoji Noguchi, Noritoshi Kako
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Patent number: 5267066Abstract: In a liquid crystal display device having pixels arranged in a matrix form, light is allowed to pass or blocked depending upon whether or not a voltage is applied to electrodes each corresponding to the pixels, and the display operation is conducted by controlling the transmission/nontransmission of light. When a conductor or switching element connected to an electrode is broken, it is not possible to apply such a voltage to the respective electrode. Such a pixel is always at the light transmission display state, with the result that the pixel becomes a bright spot, thereby degrading the display quality. Therefore, a blocking piece for blocking light is disposed over the pixel which becomes a bright spot. This prevents the bright spot from appearing, thereby improving the display quality.Type: GrantFiled: March 26, 1992Date of Patent: November 30, 1993Assignee: Sharp Kabushiki KaishaInventors: Syunzi Nakai, Toshio Maeda, Teruo Horii, Seiichi Kajitani, Tadashi Nishioka, Shigeharu Ino
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Patent number: 5267302Abstract: A facsimile system includes: a telephone apparatus; a facsimile receiving device for detecting a CNG (Calling Tone) signal, which follows a call request signal from a telephone exchange, on a telephone line, and receiving a facsimile data through the telephone line if the CNG signal is detected; a switching device for selectively connecting the telephone line to either the facsimile receiving device or the telephone apparatus; a device for controlling the switching device such that the switching device connects the telephone line to the telephone apparatus if the CNG signal is not detected by the facsimile receiving device while the telephone line is connected to the facsimile receiving device; and a device for generating a control signal if the CNG signal is not detected by the facsimile receiving device.Type: GrantFiled: December 4, 1991Date of Patent: November 30, 1993Assignee: Sharp Kabushiki KaishaInventors: Matahira Kotani, Motohiko Hayashi
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Patent number: 5262856Abstract: A method of processing video data created for display in one aspect ratio in a plurality of different sequences of frames thereof, each frame in a sequence containing background data which represents at least a part of the same relatively stationary background data in the sequence. The background data in each frame of a sequence is stored and processed so as to produce combined background data representing the background image in the sequence in a different aspect ratio, without the presence of moving objects therein. Data representing moving objects in each frame of a sequence are stored together with selected portions of the background data which surround the moving objects in each frame.Type: GrantFiled: June 4, 1992Date of Patent: November 16, 1993Assignee: Massachusetts Institute of TechnologyInventors: Andrew B. Lippman, Walter R. Bender, Patrick G. McLean
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Patent number: 5260838Abstract: An FM carrier is FM-modulated with a video signal for recordal on a magnetic medium. The phase of the FM carrier corresponding to a tip portion of a horizontal synchronizing pulse in the video signal is reset to, and the phase is fixed at, a reference phase at a leading edge of the horizontal synchronizing pulse and is fixed during every period of the horizontal synchronizing pulse width. In reproducing the video signal, the FM carrier, with its frequency doubled, is demodulated by a pulse count type FM demodulator having a frequency-doubling function. The FM carrier is always maintained in phase with the horizontal synchronizing pulse in the video signal, so that beat stripes or moire do not appear on the reproduced picture, and interference due to the leakage appears as reproduced picture distortion in correlation with the video signal. A reference burst signal necessary to a time base correction is extracted from the reproduced FM carrier.Type: GrantFiled: May 31, 1991Date of Patent: November 9, 1993Assignee: Sharp Kabushiki KaishaInventors: Soichi Iwamura, Hiroaki Nogami
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Patent number: 5260720Abstract: An image formation system includes an image data outputting device for outputting three-primary-color image data for forming a full color image, and a printer selectively writing the image data from the image data outputting device in an optical image memory by beam light for printing the image out on a recording medium, the printer including, a specifying device for specifying an arrangement of images written in the optical image memory, and a writing device dividing the single optical image memory into sections corresponding to the specified arrangement, for writing primary color images into the sections, the optical image memory being a memory where a stored image is optically recognizable and can be repetitively read out.Type: GrantFiled: March 26, 1991Date of Patent: November 9, 1993Assignee: Sharp Kabushiki KaishaInventors: Yoichi Yamamoto, Masao Narumiya, Frederic J. Kahn
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Patent number: 5258851Abstract: In a VTR for TCI signals, horizontal synchronizing signal with different time width is inserted for identifying the chrominance signal component multiplexed in each recording line at the time of recording. At the time of reproduction, this horizontal synchronizing signal is separated to generate a signal identifying the chrominance signal component in the corresponding recording line. The chrominance signal sequence in the reproduced TCI signal indicated by the identification signal and the proper sequence of the chrominance signal process are compared, where both sequences are made to coincide with each other when there is discrepancy between both sequences to prevent the generation of hue error on a monitor.Type: GrantFiled: December 21, 1990Date of Patent: November 2, 1993Assignee: Sharp Kabushiki KaishaInventor: Takayoshi Yamaguchi
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Patent number: 5253650Abstract: The apparatus for recording an electrocardiogram capable of displaying a change of spike intervals of adjacent QRS groups among a plurality of QRS groups of an electrocardiographic wave, the apparatus capable of displaying a time change of an electric potential with heart pulsations, the QRS groups showing an electric potential at a start of a ventricular systole includes a first memory unit for storing a measured electrocardiographic wave proportional to a predetermined time period, a unit for detecting a reference point of each R wave of the QRS groups in the electrocardiographic wave stored in the memory unit, a unit for displaying the electrocardiographic wave stored in the memory unit, and a control unit for controlling the display unit so that a reference point of one of the QRS groups in the electrocardiographic wave is displayed at a predetermined position on displaying unit, the control unit being capable of shifting the QRS groups in a time scale while the electrocardiographic wave is displayed on tType: GrantFiled: March 29, 1991Date of Patent: October 19, 1993Assignee: Sharp Kabushiki KaishaInventor: Yoshihiro Wada
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Patent number: 5254165Abstract: An image forming apparatus including an image receiving sheet transport system in which a photosensitive sheet and an image receiving sheet are pressed together to form an image on the image receiving sheet which is then transported to a glosser unit at a slower speed than the transporting speed of the image receiving sheet by a pressure developing device and the glosser unit, the image receiving sheet being temporarily buckled between the pressure developing device and the transport device, and then being taken up by the glosser unit. The image receiving sheet is smoothly pulled by a one-way clutch in the direction in which it is stretched.Type: GrantFiled: November 18, 1992Date of Patent: October 19, 1993Assignee: Sharp Kabushiki KaishaInventor: Akira Haruna