Patents by Inventor Euan Christopher Smith
Euan Christopher Smith 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: 20140240293Abstract: A touch sensitive device, the device comprising: a touch sensor light source to project a plane of light above a surface: a camera directed to capture a touch sense image from a region including at least a portion of said plane of light, said touch sense image comprising light scattered from said plane of light by a plurality of said objects simultaneously approaching or touching said surface; a signal processor coupled to said camera, to process a said touch sense image from said camera to identify a lateral location of each of said objects; and an output object position output, to provide output object positions for said plurality of objects; and wherein said signal processor is further configured to: input a succession of said touch sense images; process each said touch sense image to identify a plurality of candidate object touch positions; and filter said candidate object touch positions from said successive touch sense images to link said candidate object touch positions to previously identified outputType: ApplicationFiled: June 15, 2012Publication date: August 28, 2014Applicant: Light Blue Optics LtdInventors: Gareth John McCaughan, Paul Richard Routley, John Andrew, Euan Christopher Smith, Adrian James Cable
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Publication number: 20140232695Abstract: We describe a touch sensitive image display device including: an image projector to project a displayed image onto a surface; a touch sensor light source to project a plane of light above the displayed image; a camera to capture a touch sense image from light scattered from the plane of light by an approaching object; and a signal processor to process the touch sense image to identify a location of the object. The touch sensor light source is amplitude modulated, and signal processor is further configured to process a plurality of the touch sense images captured when said touch sensor light source is off to compensate for ambient light in a touch sense image captured when the touch sensor light source is on.Type: ApplicationFiled: June 15, 2012Publication date: August 21, 2014Applicant: Light Blue Optics Ltd.Inventors: Gareth John McGaughan, Paul Richard Routley, John Andrew, Euan Christopher Smith, Peter William Tudor Mash
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Patent number: 8564505Abstract: This invention generally relates to image processing systems. More particularly it relates to systems and methods for displaying images using multi-line addressing (MLA) or total matrix addressing (TMA) techniques, and to techniques for post-processing of data for display generated by these techniques. Embodiments of the invention are particularly useful for driving OLED (organic light emitting diode) displays. We describe a method of driving an electroluminescent display to display an image using a plurality of temporal sub-frames, data for a said sub-frame comprising a first set of drive values (R;C) and second set of drive values (C;R) for driving respective first and second axes of said display, a said sub-frame having an associated sub-frame display time.Type: GrantFiled: March 21, 2007Date of Patent: October 22, 2013Assignee: Cambridge Display Technology LimitedInventor: Euan Christopher Smith
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Publication number: 20130194644Abstract: We describe a holographic image projector, comprising: a laser light source to provide light at a laser wavelength; a first spatial light modulator (SLM) to display a hologram, wherein said first SLM is illuminated by said laser light source; intermediate image optics to provide a first intermediate real image plane at which a real image produced by said hologram displayed on said first SLM is formed; a wavelength-conversion material located at said first intermediate real image plane to convert said laser wavelength to at least a first output wavelength different to said laser wavelength; and second optics to project light from said real image at said output wavelength to provide a displayed image.Type: ApplicationFiled: January 30, 2012Publication date: August 1, 2013Inventors: Adrian James Cable, Paul Richard Routley, Euan Christopher Smith
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Patent number: 8405581Abstract: Embodiments relate to systems and methods for displaying images using multi-line addressing (MLA) or total matrix addressing (TMA) techniques, with reduced noise. Embodiments of the invention are particularly useful for driving OLED (organic light emitting diode) displays.Type: GrantFiled: March 21, 2007Date of Patent: March 26, 2013Assignee: Cambridge Display Technology LimitedInventors: Euan Christopher Smith, Peter Mash, Adrian Cable
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Patent number: 8300057Abstract: Embodiments include a hardware accelerator for non-negative matrix factorization (NMF), in particular for driving an OLED display. The hardware accelerator determines a oair of factor matrices (R;C) which when multiplied together approximate a target matrix. Each factor matrix R, C has multiple data buses each associated with a respective block of memory and there is a matrix of processor blocks and an associated memory block storing a portion of a matrix (Q) representing a difference between a product of the pair of factor matrices and the target matrix. Control circuitry controls the reading and writing of data between the various elements to perform the matrix factorisation.Type: GrantFiled: March 21, 2007Date of Patent: October 30, 2012Assignee: Cambridge Display Technology LimitedInventors: Euan Christopher Smith, Nicholas Lawrence
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Patent number: 8237638Abstract: A method of driving an electro-optic display, the display having a plurality of pixels each addressable by a row electrode and a column electrode, the method including: receiving image data for display, the image data defining an image matrix; factorizing the image matrix into a product of at least first and second factor matrices, the first factor matrix defining row drive signals for the display, the second factor matrix defining column drive signals for the display; and driving the display row and column electrodes using the row and column drive signals respectively defined by the first and second factor matrices.Type: GrantFiled: September 29, 2005Date of Patent: August 7, 2012Assignee: Cambridge Display Technology LimitedInventors: Euan Christopher Smith, Nicholas Lawrence
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Patent number: 8237635Abstract: This invention relates to methods and apparatus for driving emissive, in particular organic light emitting diodes (OLED), displays using multi-line addressing (MLA) techniques. Embodiments of the invention are particularly suitable for use with so-called passive matrix OLED displays. A method of driving an emissive display, the display comprising a plurality of pixels each addressable by a row electrode and a column electrode, the method comprising: driving a plurality of column electrodes with a first set of column drive signals; and driving two or more row electrodes with a first set of forward bias row drive signals at the same time as the column electrode driving with the column drive signals; then driving the plurality of column electrodes with a second and subsequent sets of column drive signals; and driving the two or more row electrodes with a second and subsequent sets of forward bias row drive signals at the same time as the column electrode driving with the second column drive signals.Type: GrantFiled: October 10, 2011Date of Patent: August 7, 2012Assignee: Cambridge Display Technology LimitedInventors: Euan Christopher Smith, Paul Richard Routley, Jonathan James Michael Halls
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Publication number: 20120081416Abstract: This invention relates to methods and apparatus for driving emissive, in particular organic light emitting diodes (OLED) displays using multi-line addressing (MLA) techniques. Embodiments of the invention are particularly suitable for use with so-called passive matrix OLED displays.Type: ApplicationFiled: October 10, 2011Publication date: April 5, 2012Inventors: Euan Christopher Smith, Paul Richard Routley, Jonathan James Michael Halls
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Patent number: 8115704Abstract: A method of driving an emissive display, the display comprising a plurality of pixels each addressable by a row electrode and a column electrode, the method comprising: driving a plurality of the column electrodes with a first set of column drive signals; and driving two or more of the row electrodes with a first set of forward bias row drive signals at the same time as the column electrode driving with the column drive signals; then driving the plurality of column electrodes with a second and subsequent sets of column drive signals; and driving the two or more row electrodes with a second and subsequent sets of forward bias row drive signals at the same time as the column electrode driving with the second column drive signals.Type: GrantFiled: September 29, 2005Date of Patent: February 14, 2012Assignee: Cambridge Display Technology LimitedInventors: Euan Christopher Smith, Paul Richard Routley, Jonathan James Michael Halls
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Patent number: 7953682Abstract: This invention generally relates to methods, apparatus and computer program code processing digital data using non-negative matrix factorisation.Type: GrantFiled: November 30, 2005Date of Patent: May 31, 2011Assignee: Cambridge Display Technology LimitedInventors: Euan Christopher Smith, Paul Richard Routley, Clare Louise Foden
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Patent number: 7944410Abstract: This invention relates to methods and apparatus for driving electroluminescent, in particular organic light emitting diodes (OLED) displays using multi-line addressing (MLA) techniques. Embodiments of the invention are particularly suitable for use with so-called passive matrix OLED displays. A current generator for an electroluminescent display driver, the current generator including; a first, reference current input to receive a reference current; a second, ratioed current input to receive a ratioed current; a first ratio control input to receive a first control signal input; a controllable current mirror having a control input coupled to the first ratio control input, a current input coupled to the reference current input, and an output coupled to the ratioed current input; the current generator being configured such that a signal and the control input controls a ratio of the ratioed current to the reference current.Type: GrantFiled: September 29, 2005Date of Patent: May 17, 2011Assignee: Cambridge Display Technology LimitedInventors: Euan Christopher Smith, Paul Richard Routley
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Publication number: 20100253710Abstract: This invention relates to pixel driver circuits for active matrix optoelectronic devices, in particular OLED (organic light emitting diodes) displays. We describe an active matrix optoelectronic device having a plurality of active matrix pixels each said pixel including a pixel circuit comprising a thin film transistor (TFT) for driving the pixel and a pixel capacitor for storing a pixel value, wherein said TFT comprises a TFT with a floating gate.Type: ApplicationFiled: October 29, 2008Publication date: October 7, 2010Applicant: CAMBRIDGE DISPLAY TECHNOLOGY LTD.Inventors: Aleksandra Rankov, Euan Christopher Smith
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Publication number: 20090322724Abstract: This invention generally relates to image processing systems. More particularly it relates to systems and methods for displaying images using multi-line addressing (MLA) or total matrix addressing (TMA) techniques, and to techniques for post-processing of data for display generated by these techniques. Embodiments of the invention are particularly useful for driving OLED (organic light emitting diode) displays. We describe a method of driving an electroluminescent display to display an image using a plurality of temporal sub-frames, data for a said sub-frame comprising a first set of drive values (R;C) and second set of drive values (C;R) for driving respective first and second axes of said display, a said sub-frame having an associated sub-frame display time.Type: ApplicationFiled: March 21, 2007Publication date: December 31, 2009Inventor: Euan Christopher Smith
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Patent number: 7537947Abstract: Apparatus and methods for providing displays based upon the principle of photoluminescent quenching are described. The invention includes a method of displaying information using photoluminescence quenching, the method comprising providing an optoelectronic display comprising a photoluminescent material between a pair of electrodes, providing illumination for the photoluminescent material to cause the photoluminescent material to photoluminescence, and biasing the electrodes to at least partially quench the photoluminescence.Type: GrantFiled: August 29, 2002Date of Patent: May 26, 2009Assignee: Cambridge Display Technology LimitedInventors: Euan Christopher Smith, Alec Gordon Gunner, Jonathan J. M. Halls
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Publication number: 20090128571Abstract: This invention generally relates to data processing hardware, and more particularly to hardware accelerators and related methods for matrix factorisation especially non-negative matrix factorisation (NMF). Embodiments of the invention are particularly useful for driving electroluminescent displays such as OLED displays.Type: ApplicationFiled: March 21, 2007Publication date: May 21, 2009Inventors: Euan Christopher Smith, Nicholas Lawrence
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Publication number: 20090128459Abstract: This invention generally relates to image processing systems, and more particularly to systems and methods for displaying images using multi-line addressing (MLA) or total matrix addressing (TMA) techniques, with reduced noise. Embodiments of the invention are particularly useful for driving OLED (organic light emitting diode) displays.Type: ApplicationFiled: March 21, 2007Publication date: May 21, 2009Inventors: Euan Christopher Smith, Peter Mash, Adrian Cable
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Publication number: 20080291122Abstract: This invention generally relates to methods, apparatus and computer program code processing digital data using non-negative matrix factorisation.Type: ApplicationFiled: November 30, 2005Publication date: November 27, 2008Inventors: Euan Christopher Smith, Paul Richard Routley, Clare Louise Foden
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Publication number: 20040263045Abstract: Apparatus and methods for providing displays based upon the principle of photoluminescent quenching are described. The invention includes a method of displaying information using photoluminescence quenching, the method comprising providing an optoelectronic display comprising a photoluminescent material between a pair of electrodes, providing illumination for the photoluminescent material to cause the photoluminescent material to photoluminescence, and biasing the electrodes to at least partially quench the photoluminescence.Type: ApplicationFiled: August 26, 2004Publication date: December 30, 2004Inventors: Euan Christopher Smith, Alec Gordon Gunner, Jonathan J. M. Halls