Patents by Inventor Clive Catchpole

Clive Catchpole 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).

  • Patent number: 7009666
    Abstract: A reflective cholesteric display that may be viewed under a wide range of ambient lighting conditions, ranging from complete darkness to bright sunlight. The display includes a chiral nematic liquid crystal material located between first and second substrates, an ambidextrous or bi-directional circular polarizer, a partial mirror, also referred to as a transflector, and a light source. The liquid crystal material includes focal conic and planar textures that are stable in the absence of an electric field. The ambidextrous circular polarizer is located adjacent to one of the substrates that constrain the liquid crystal material. The chiral nematic liquid crystal display may be operated in both a transmissive mode and a reflective mode.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: March 7, 2006
    Assignee: Kent Displays Incorporated
    Inventors: Asad A. Khan, Michael E. Stefanov, Clive Catchpole
  • Publication number: 20020030776
    Abstract: A reflective cholesteric display that may be viewed under a wide range of ambient lighting conditions, ranging from complete darkness to bright sunlight. The display includes a chiral nematic liquid crystal material located between first and second substrates, an ambidextrous or bi-directional circular polarizer, a partial mirror, also referred to as a transflector, and a light source. The liquid crystal material includes focal conic and planar textures that are stable in the absence of an electric field. The ambidextrous circular polarizer is located adjacent to one of the substrates that constrain the liquid crystal material. The chiral nematic liquid crystal display may be operated in both a transmissive mode and a reflective mode.
    Type: Application
    Filed: September 24, 2001
    Publication date: March 14, 2002
    Applicant: Kent Displays Incorporated
    Inventors: Asad A. Khan, Michael E. Stefanov, Clive Catchpole
  • Patent number: 5644330
    Abstract: A display device (10) having first and second substrates (12) and (30) and a layer of a PSCT or PFCT liquid crystal material disposed therebetween. The display is driven by an addressing scheme in which voltages are applied either in phase or out of phase in order to switch the liquid crystal material between stable states.
    Type: Grant
    Filed: August 22, 1995
    Date of Patent: July 1, 1997
    Assignee: Kent Displays, Inc.
    Inventors: Clive Catchpole, Haiji Yuan, Minhua Lu
  • Patent number: 5313726
    Abstract: An improved apparatus for viewing transparent film prints, such as X-rays, mammograms and sonograms, is provided, which apparatus includes a light source, a viewing stage and an array of light valves to selectively prevent the transmission of light from the light source to certain areas of the viewing stage. The apparatus allows an operator to more efficiently and accurately discern detail in the analysis of transparent film prints.
    Type: Grant
    Filed: December 1, 1992
    Date of Patent: May 24, 1994
    Assignee: Advanced Technology Incubator, Inc.
    Inventors: Zvi Yaniv, Lionel Robbins, Clive Catchpole
  • Patent number: 5063599
    Abstract: Check processing apparatus including an offset pair of image-lift sites and an associated "Heat-Dump", with this apparatus preferably built as an add-on, plug-in module to be used in a check-sorting system.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: November 5, 1991
    Assignee: Unisys Corporation
    Inventors: David Concannon, Gary Copenhaver, Johan Bakker, John Vala, Gerald Banks, Clive Catchpole
  • Patent number: 4993802
    Abstract: An optical array including a source projecting spectral light onto the input-aperture of a fibre-optic bundle, the bundle's exit-aperture outputting a rectangular beam with fibres "random-laid" and spread-along the exit-aperture to make this rectangular beam's intensity more uniform.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: February 19, 1991
    Assignee: Unisys Corp.
    Inventors: David Concannon, John Vala, Clive Catchpole
  • Patent number: 4827085
    Abstract: Disclosed is an image data input and display means, and a voice and data electronic teleconferencing system incorporating the image data input and display means. The image data input and display means includes sensor means for inputting image data integrally with means for displaying both the local input image data and remotely inputted image data.
    Type: Grant
    Filed: January 6, 1988
    Date of Patent: May 2, 1989
    Assignee: Ovonic Imaging Systems, Inc.
    Inventors: Zvi Yaniv, Clive Catchpole
  • Patent number: 4827084
    Abstract: A solid state, touch sensitive position sensor, which sensor includes a conductive surface along the boundaries of which are disposed at least two sets of two elongated current distribution and collection means. The touch sensitive position sensor further includes resistance means operatively disposed so as to interconnect said current distribution and collection means with said conductive surface. The current distribution and collection means and resistance means are configured, so as to (1) provide a substantially linear electric field distribution of equipotential lines and (2) sequentially turn one set of said current distribution and collection means on while turning the other sets off. In an important embodiment, the conductive surface is formed immediately atop a copyboard and by utilizing erasable, felt tip markers having metallic inserts therein, visual images as well as electrical signals, indicative of X-Y coordinate location, may be simultaneously generated.
    Type: Grant
    Filed: November 19, 1987
    Date of Patent: May 2, 1989
    Assignee: Ovonic Imaging Systems, Inc.
    Inventors: Zvi Yaniv, Clive Catchpole, Vincent D. Cannella, John C. McGill, Mike Prewarski, Ronald G. Mulberger
  • Patent number: 4746804
    Abstract: By maintaining the first electrodes of a photogenerative element and a current blocking element at a common potential while electrically interconnecting the second electrodes thereof, the blocking element need not be masked from incident radiation because the stored electrical signal generated by the photogenerative element will not be dissipated by photogenerated carrier pairs contributed by the current blocking element.
    Type: Grant
    Filed: September 8, 1987
    Date of Patent: May 24, 1988
    Assignee: Ovonic Imaging Systems, Inc.
    Inventors: Koichi Kitamura, Louis D. Swartz, Clive Catchpole, Zvi Yaniv
  • Patent number: 4731610
    Abstract: An electronic matrix system and method for rapidly storing and efficiently retaining electric charge in selected ones of a plurality of storage elements are disclosed. Each storage element is addressable through a pair of parallel row select address lines and a column address line. A pair of threshold devices are coupled in nonopposing relation between the row select address lines and the storage element is coupled between the common node of the threshold devices and the column address line to which charging potential is applied. During the charging of the storage element, operating potentials which are substantially equal and opposite in polarity are applied to the row select line pair to forward bias both threshold devices and thereafter operating potentials which are also substantially equal and opposite in polarity are applied to the row select line pair to back bias both threshold devices to provide retention of the charge in the storage element.
    Type: Grant
    Filed: January 21, 1986
    Date of Patent: March 15, 1988
    Assignee: Ovonic Imaging Systems, Inc.
    Inventors: Yair Baron, Walter E. Chapelle, Shui-Chih A. Lien, Clive Catchpole
  • Patent number: 4728803
    Abstract: Novel line imaging apparatus utilizing a large area linear array of amorphous silicon alloy photosensitive elements, said apparatus adapted to provide automatic adjustment for sensor and circuit variables as well as for changes in the intensity of image illumination.
    Type: Grant
    Filed: July 15, 1986
    Date of Patent: March 1, 1988
    Assignee: Ovonic Imaging Systems, Inc.
    Inventors: Clive Catchpole, John M. Jepsen, Louis D. Swartz, Olivier F. Prache
  • Patent number: 4714836
    Abstract: By maintaining the first electrodes of a photogenerative element and a current blocking element at a common potential while electrically interconnecting the second electrodes thereof, the blocking element need not be masked from incident radiation because the stored electrical signal generated by the photogenerative element will not be dissipated by photogenerated carrier pairs contributed by the current blocking element.
    Type: Grant
    Filed: September 16, 1986
    Date of Patent: December 22, 1987
    Assignee: Ovonic Imaging Systems, Inc.
    Inventors: Koichi Kitamura, Louis D. Swartz, Clive Catchpole, Zvi Yaniv
  • Patent number: 4675739
    Abstract: An incident radiation sensing apparatus comprises an array of photosensitive elements formed as an integrated circuit on a substrate. Each of the photosensitive elements includes a capacitor for storing charge, a conductive means for charging the capacitor to a preselected magnitude, a blocking means for inhibiting the discharge of charge stored on the capacitor; and a photoresponsive means formed from deposited semiconductor material for generating charge carriers at a rate responsive to the intensity of radiation incident upon the photoresponsive means. The photoresponsive means is connected to the capacitor so that the charge carriers generated in the photoresponsive means reduce the magnitude of the charge on the capacitor as a function of the magnitude of, and the time incidence of, the incident radiation.
    Type: Grant
    Filed: March 20, 1985
    Date of Patent: June 23, 1987
    Assignee: Energy Conversion Devices, Inc.
    Inventors: Clive Catchpole, Zvi Yaniv, Vincent D. Cannella, John Keem, Louis D. Swartz