Patents by Inventor Allan Evans
Allan Evans 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).
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Publication number: 20150037925Abstract: A method of fabricating a superlattice structure requires that atoms of a first III-V semiconductor compound be introduced into a vacuum chamber such that the atoms are deposited uniformly on a substrate. Atoms of at least one additional III-V compound are also introduced such that the atoms of the two III-V compounds form a repeating superlattice structure of alternating thin layers. Atoms of a surfactant are also introduced into the vacuum chamber while the III-V semiconductor compounds are being introduced, or immediately thereafter, such that the surfactant atoms act to improve the quality of the resulting SL structure. The surfactant is preferably bismuth, and the III-V semiconductor compounds are preferably GaSb along with either InAs or InAsSb; atoms of each material are preferably introduced using molecular beam epitaxy. The resulting superlattice structure is suitably used to form at least a portion of an IR photodetector.Type: ApplicationFiled: August 1, 2013Publication date: February 5, 2015Inventors: ALLAN EVANS, William Tennant, Andrew Hood
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Patent number: 8945052Abstract: A liquid delivery apparatus for the intrathecal delivery of one or more medications to a patient is disclosed. The liquid delivery apparatus generally includes a liquid reservoir, a liquid metering unit fluidly connected to the liquid reservoir, and a catheter delivery tube fluidly connected to the liquid metering unit. Preferably, the liquid delivery apparatus includes two or more liquid reservoirs. In various embodiments, the liquid reservoir includes a deformable balloon and a compressive sleeve spring as a pressure source, the liquid metering unit is a piezoelectrically actuated microvalve, and/or diagnostic sensors are included in the apparatus. The disclosed apparatus are compact, volume-efficient, energy-efficient, capable of delivering accurate fluid volumes, and address problems associated with multi-medication therapies. Methods of operating the liquid delivery apparatus are also disclosed.Type: GrantFiled: October 31, 2012Date of Patent: February 3, 2015Assignee: The Regents of the University of MichiganInventors: Srinivas Chiravuri, Allan Evans, Yogesh B. Gianchandani, Jong Moon Park
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Patent number: 8896507Abstract: A liquid crystal device comprises an active matrix substrate (6) and a counter-substrate (7) provided with homeotropic alignment surfaces (11). A layer of nematic liquid crystal material is provided between the alignment surfaces (11) so as to form a vertically aligned nematic device. The substrates (6, 7) carry a pixel electrode arrangement and a counter-electrode arrangement which define a plurality of pixel regions. Each of least some of these regions has a pixel electrode (13), which may be split into two halves, and a counter-electrode (8) which are arranged to apply an electric field for controlling the liquid crystal director (12) out-of-plane tilt angle. A further electrode (14), for example in the form of a plurality of parallel fingers, cooperates with at least one of the other electrodes (8, 13) to apply a second electric field for controlling the director in-plane azimuth angle. Such a device may be used, for example, as a switchable public/private display.Type: GrantFiled: September 26, 2008Date of Patent: November 25, 2014Assignee: Sharp Kabushiki KaishaInventors: Benjamin John Broughton, Nathan James Smith, Allan Evans, Paul Antony Gass
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Publication number: 20140196488Abstract: An apparatus extracts water from the air using a single circuit of gas containing a compressor, a cooling element, a heat exchanger and an ion source, where a single stream of air is used to provide water and to pre-cool the inlet air.Type: ApplicationFiled: January 17, 2013Publication date: July 17, 2014Applicant: SHARP KABUSHIKI KAISHAInventors: Philip Mark Shryane ROBERTS, Allan EVANS, Michael Charles TOMLIN, Harry Garth WALTON
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Patent number: 8698718Abstract: A display device is provided that comprises a liquid crystal display panel for displaying an image by spatial light modulation, and circuitry for switching liquid crystal in the panel between having a first configuration in a first mode to cause an image displayed using the panel to be discernible from a wide range of viewing angles, and having a second configuration in a second mode to cause an image displayed using the panel to be discernible substantially only from within a narrow range of viewing angles. Several types of display panel to achieve such in-panel switching between public and private viewing modes are disclosed.Type: GrantFiled: September 22, 2011Date of Patent: April 15, 2014Assignee: Sharp Kabushiki KaishaInventors: Paul Antony Gass, Diana Ulrich Kean, Nathan Smith, Thomas Mathew Wynne-Powell, Allan Evans, Benjamin John Broughton
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Patent number: 8558853Abstract: A single view display of reduced power consumption is provided. The display comprises a display device for displaying the single view and an optical system for concentrating light modulated by the single view into a reduced angular range. A viewer direction determining system determines the direction of a viewer relative to the display and controls the display device and the optical system so that the angular range includes the direction of the viewer.Type: GrantFiled: February 19, 2009Date of Patent: October 15, 2013Assignee: Sharp Kabushiki KaishaInventors: Michel Sagardoyburu, Allan Evans, Alistair Paul Curd, Sumanta Talukdar, Harry Garth Walton, Nathan James Smith
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Patent number: 8502138Abstract: An ion mobility spectrometer includes a plurality of substrates defining a measurement region for receiving a singular laminar gas flow without any carrier or sheath gas. The measurement region includes an ionization region that is continuous with a detection region. An ionizing electrode, which may include a plurality of asymmetric electrodes, produces ions in the gas sample within the ionization region. The ionizing electrode may apply a time varying voltage to the gas sample to generate a time dependent ion production. A field generating electrode generates an electric field to deflect the ions in the gas sample, and a detection electrode array detects the deflected ions within the detection region. A controller is configured to determine ion species based on the detection of ions by the detection electrode array.Type: GrantFiled: July 29, 2011Date of Patent: August 6, 2013Assignee: Sharp Kabushiki KaishaInventors: Sinead Marie Matthews, Lesley Anne Parry-Jones, Allan Evans
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Patent number: 8400384Abstract: A display device is provided that comprises a liquid crystal display panel for displaying an image by spatial light modulation, and circuitry for switching liquid crystal in the panel between having a first configuration in a first mode to cause an image displayed using the panel to be discernible from a wide range of viewing angles, and having a second configuration in a second mode to cause an image displayed using the panel to be discernible substantially only from within a narrow range of viewing angles. Several types of display panel to achieve such in-panel switching between public and private viewing modes are disclosed.Type: GrantFiled: February 16, 2012Date of Patent: March 19, 2013Assignee: Sharp Kabushiki KaishaInventors: Paul Antony Gass, Diana Ulrich Kean, Nathan Smith, Thomas Mathew Wynne-Powell, Allan Evans, Benjamin John Broughton
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Publication number: 20130057961Abstract: A multiple depth display provided for displaying images at different depths comprises a single display device (61), for displaying all of the images. An optical system (62, 63, 64) is disposed in front of the display device (61). The optical system comprises first and second spaced-apart partial reflectors (62, 63) and polarization optics (64) for providing first and second light paths for first and second images or sequences of images displayed by the device (61). The first light path (65) comprises partial transmission through the first reflector (62), partial reflection from the second reflector (63), partial reflection from the first reflector (62), and partial transmission through the second reflector (65) towards a viewing region.Type: ApplicationFiled: September 7, 2012Publication date: March 7, 2013Applicant: SHARP KABUSHIKI KAISHAInventors: Allan EVANS, Alistair CURD, Thomas WYNNE-POWELL, Adrian JACOBS, Nathan SMITH, Emma WALTON, Gregory GAY
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Patent number: 8368727Abstract: A display device having a display panel for displaying an image by spatial light modulation includes a plurality of pixel groups, each pixel group including a first pixel having a first type of luminance against viewing angle response, and a second pixel having a second type of luminance against viewing angle response, wherein the first and second luminance against viewing angle responses are different from one another. The display device further includes a controller operatively coupled to each of the plurality of pixel groups, wherein the controller is configured to drive each of the plurality of pixel groups such that on average the plurality of pixel groups simultaneously provide a predetermined on-axis luminance and an predetermined off-axis luminance for a region of the image corresponding to each pixel group.Type: GrantFiled: January 18, 2010Date of Patent: February 5, 2013Assignee: Sharp Kabushiki KaishaInventors: Nathan James Smith, Benjamin John Broughton, Allan Evans, Andrew Kay, Kenji Maeda, Tatsuo Watanabe
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Publication number: 20130026357Abstract: An ion mobility spectrometer includes a plurality of substrates defining a measurement region for receiving a singular laminar gas flow without any carrier or sheath gas. The measurement region includes an ionization region that is continuous with a detection region. An ionizing electrode, which may include a plurality of asymmetric electrodes, produces ions in the gas sample within the ionization region. The ionizing electrode may apply a time varying voltage to the gas sample to generate a time dependent ion production. A field generating electrode generates an electric field to deflect the ions in the gas sample, and a detection electrode array detects the deflected ions within the detection region. A controller is configured to determine ion species based on the detection of ions by the detection electrode array.Type: ApplicationFiled: July 29, 2011Publication date: January 31, 2013Applicant: SHARP KABUSHIKI KAISHAInventors: Sinead Marie MATTHEWS, Lesley Anne PARRY-JONES, Allan EVANS
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Publication number: 20130015362Abstract: A system and method are disclosed for the simultaneous optical disinfection and detection of biological particles in a flowing fluid, such as air or water, medium. A light source for irradiating the flowing medium is a dual wavelength laser element simultaneously emitting a visible laser beam and an ultraviolet laser beam. In particular, a laser diode may generate a first visible laser light beam, and a second ultraviolet laser light beam may be generated by passing the first laser light beam through a frequency doubling crystal. Optical detectors measure scattering, fluorescence and/or transmission of the laser light beams from the air or water medium to determine the presence of biological particles in real-time.Type: ApplicationFiled: July 12, 2011Publication date: January 17, 2013Applicant: SHARP KABUSHIKI KAISHAInventors: Stewart Edward HOOPER, Tim Michael SMEETON, Allan EVANS
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Patent number: 8344976Abstract: A display device is provided that comprises a liquid crystal display panel for displaying an image by spatial light modulation, and circuitry for switching liquid crystal in the panel between having a first configuration in a first mode to cause an image displayed using the panel to be discernible from a wide range of viewing angles, and having a second configuration in a second mode to cause an image displayed using the panel to be discernible substantially only from within a narrow range of viewing angles. Several types of display panel to achieve such in-panel switching between public and private viewing modes are disclosed.Type: GrantFiled: February 16, 2012Date of Patent: January 1, 2013Assignee: Sharp Kabushiki KaishaInventors: Paul Antony Gass, Diana Ulrich Kean, Nathan Smith, Thomas Mathew Wynne-Powell, Allan Evans, Benjamin John Broughton
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Patent number: 8323246Abstract: A liquid delivery apparatus for the intrathecal delivery of one or more medications to a patient is disclosed. The liquid delivery apparatus generally includes a liquid reservoir, a liquid metering unit fluidly connected to the liquid reservoir, and a catheter delivery tube fluidly connected to the liquid metering unit. Preferably, the liquid delivery apparatus includes two or more liquid reservoirs. In various embodiments, the liquid reservoir includes a deformable balloon and a compressive sleeve spring as a pressure source, the liquid metering unit is a piezoelectrically actuated microvalve, and/or diagnostic sensors are included in the apparatus. The disclosed apparatus are compact, volume-efficient, energy-efficient, capable of delivering accurate fluid volumes, and address problems associated with multi-medication therapies. Methods of operating the liquid delivery apparatus are also disclosed.Type: GrantFiled: December 8, 2008Date of Patent: December 4, 2012Assignee: The Regents of the University of MichiganInventors: Srinivas Chiravuri, Allan Evans, Yogesh B. Gianchandani, Jong M. Park
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Publication number: 20120154458Abstract: A method of processing image data for display by a display panel of a display device is provided. The method comprises receiving main image pixel data representing a main and side image pixel data representing a side image. In a first processing step, a mapping is performed of the pixel data to signals used to drive the display panel. The mapping is arranged to produce an average on-axis luminance which is dependent mainly on the main image pixel data and an average off-axis luminance which is dependent at least to some extent on the side image pixel data. In a second processing step, the received side image pixel data are processed to emphasise at least one feature of the side image which might otherwise be perceived by a viewer as being de-emphasised in the side image displayed off axis as a result of the first processing step.Type: ApplicationFiled: September 10, 2010Publication date: June 21, 2012Applicant: SHARP KABUSHIKI KAISHAInventors: Andrew Kay, Allan Evans, Benjamin John Broughton, Kenji Maeda
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Publication number: 20120147026Abstract: A display device is provided that comprises a liquid crystal display panel for displaying an image by spatial light modulation, and circuitry for switching liquid crystal in the panel between having a first configuration in a first mode to cause an image displayed using the panel to be discernible from a wide range of viewing angles, and having a second configuration in a second mode to cause an image displayed using the panel to be discernible substantially only from within a narrow range of viewing angles. Several types of display panel to achieve such in-panel switching between public and private viewing modes are disclosed.Type: ApplicationFiled: February 16, 2012Publication date: June 14, 2012Applicant: SHARP KABUSHIKI KAISHAInventors: Paul Antony GASS, Diana Ulrich KEAN, Nathan SMITH, Thomas Mathew WYNNE-POWELL, Allan EVANS, Benjamin John BROUGHTON
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Patent number: 8194197Abstract: A display device includes a first layer having an optically active display portion, a second layer including a photovoltaic element, and a third layer including electronics operatively coupled to the first layer, wherein the electronics are configured to drive the optically active display portion. Further, the second layer is arranged between the first and third layers.Type: GrantFiled: April 13, 2010Date of Patent: June 5, 2012Assignee: Sharp Kabushiki KaishaInventors: Allan Evans, Stephen Day, Sunay Shah, Patrick Zebedee, Lesley Parry-Jones, Gareth Nicholas
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Patent number: 8149272Abstract: A multiple view display comprises a parallax optic such as a parallax barrier (25) and a spatial light modulator (20) having a plurality of pixels arranged as rows and columns. The parallax optic (25) cooperates with the pixel structure to create a plurality of primary viewpoint-corrected viewing windows. The rows are arranged as groups and the parallax elements are arranged as rows. Each parallax element is aligned with a respective group of rows of the pixels. The pixels comprise sets of pixels of different colors arranged so that the sequence of visible colors viewable in each viewing window through each parallax element of each row of parallax elements is different from the sequence of pixel colors visible through the or each nearest parallax element in the or each adjacent row of parallax elements.Type: GrantFiled: September 20, 2005Date of Patent: April 3, 2012Assignee: Sharp Kabushiki KaishaInventors: Allan Evans, Jonathan Mather, Graham Jones
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Patent number: 8144093Abstract: A display device is provided that comprises a liquid crystal display panel for displaying an image by spatial light modulation, and circuitry for switching liquid crystal in the panel between having a first configuration in a first mode to cause an image displayed using the panel to be discernible from a wide range of viewing angles, and having a second configuration in a second mode to cause an image displayed using the panel to be discernible substantially only from within a narrow range of viewing angles. Several types of display panel to achieve such in-panel switching between public and private viewing modes are disclosed.Type: GrantFiled: September 10, 2010Date of Patent: March 27, 2012Assignee: Sharp Kabushiki KaishaInventors: Paul Antony Gass, Diana Ulrich Kean, Nathan Smith, Thomas Mathew Wynne-Powell, Allan Evans, Benjamin John Broughton
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Publication number: 20120056914Abstract: A display device is provided that comprises a liquid crystal display panel for displaying an image by spatial light modulation, and circuitry for switching liquid crystal in the panel between having a first configuration in a first mode to cause an image displayed using the panel to be discernible from a wide range of viewing angles, and having a second configuration in a second mode to cause an image displayed using the panel to be discernible substantially only from within a narrow range of viewing angles. Several types of display panel to achieve such in-panel switching between public and private viewing modes are disclosed.Type: ApplicationFiled: September 22, 2011Publication date: March 8, 2012Applicant: SHARP KABUSHIKI KAISHAInventors: Paul Antony GASS, Diana Ulrich KEAN, Nathan SMITH, Thomas Mathew WYNNE-POWELL, Allan EVANS, Benjamin John BROUGHTON