Patents by Inventor Charles Ung
Charles Ung 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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Patent number: 9274615Abstract: An interactive input system comprises at least two imaging assemblies capturing image frames of a region of interest from different vantages, each imaging assembly comprising an image sensor and signal processing circuitry implemented on an application specific integrated circuit (ASIC), image data acquired by the image sensor being pre-processed by the signal processing circuitry; and processing structure processing pre-processed image data output by the imaging assemblies to determine the location of at least one pointer within the region of interest.Type: GrantFiled: November 13, 2012Date of Patent: March 1, 2016Assignee: PixArt Imaging Inc.Inventors: Clinton Lam, Lawrence Bruce Hewitt, Trevor Akitt, Charles Ung
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Patent number: 8902195Abstract: An input panel for an interactive input system comprises an optical waveguide; a first radiation source directing radiation into said optical waveguide, said radiation undergoing total internal reflection within said optical waveguide; a diffusion layer adjacent to and on one side of the optical waveguide, totally internally reflected light being frustrated and escaping the optical waveguide in response to pointer contacts on the diffusion layer; a second radiation source directing radiation towards another side of the optical waveguide that is opposite the one side; and at least one imaging device having a field of view looking at the optical waveguide and capturing image frames, wherein said first and second radiation sources are turned on and off in succession and wherein said first radiation source is turned off when said second radiation source is on and wherein said first radiation source is turned on when said second radiation source is off.Type: GrantFiled: September 1, 2010Date of Patent: December 2, 2014Assignee: SMART Technologies ULCInventors: Grant McGibney, Gerald Morrison, Charles Ung, Trevor Akitt, Ed Tse, Erik Benner, Jamie Duncalf
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Patent number: 8456418Abstract: An apparatus for detecting a pointer within a region of interest includes a first reflective element extending along a first side of the region of interest and reflecting light towards the region of interest. A second reflective element extends along a second side of the region of interest and reflects light towards the region of interest. The second side is joined to the first side to define a first corner. A non-reflective region generally in the plane of at least one of the first and second reflective elements is adjacent the first corner. At least one imaging device captures images of the region of interest including reflections from the first and second reflective elements.Type: GrantFiled: June 13, 2007Date of Patent: June 4, 2013Assignee: SMART Technologies ULCInventors: Chi Man Charles Ung, David Kenneth Booth, Stephen Worthington, Mark Andrew Fletcher, Roberto A. L. Sirotich
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Publication number: 20120274765Abstract: An apparatus for detecting a pointer within a region of interest comprises a first reflective element extending along a first side of the region of interest and reflecting light towards the region of interest. The first reflective element comprises at least two generally parallel bands thereon, the bands at least comprising a retro-reflective band and a reflective band. A second reflective element extends along a second side of the region of interest and reflects light towards the region of interest, the second side being joined to the first side to define a first corner. The second reflecting element comprises at least two generally parallel bands thereon, the bands at least comprising a retro-reflective band and a reflective band. At least one imaging device captures images of the region of interest including reflections from the reflective and retro-reflective bands of the first and second reflective elements.Type: ApplicationFiled: February 28, 2012Publication date: November 1, 2012Applicant: SMART TECHNOLOGIES ULCInventors: Chi Man Charles Ung, David Kenneth Booth, Stephen Worthington, Roberto A.L. Sirotich, Mark Andrew Fletcher, Holly Wytrykush
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Patent number: 8274496Abstract: An apparatus for detecting a pointer includes a waveguide and a touch surface over the waveguide on which pointer contacts are to be made. At least one reflecting device extends along a first side of the waveguide and touch surface. The reflecting device defines an optical path between the interior of the waveguide and the region of interest above the touch surface. At least one imaging device looks across the touch surface and into the waveguide. The imaging device captures images of the region of interest and within the waveguide including reflections from the reflecting device.Type: GrantFiled: October 31, 2008Date of Patent: September 25, 2012Assignee: SMART Technologies ULCInventors: Chi Man Charles Ung, David Kenneth Booth, Roberto A. L. Sirotich
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Publication number: 20110242005Abstract: An interactive input device comprises a panel formed of energy transmissive material and having an input surface, energy dispersing structure associated with the panel, the energy dispersing structure dispersing energy emitted by a pointer that enters the panel via the input surface and at least one imaging assembly, at least some of the dispersed energy being directed towards the at least one imaging assembly.Type: ApplicationFiled: March 31, 2010Publication date: October 6, 2011Applicant: SMART Technologies ULCInventors: CHI MAN CHARLES UNG, Andrew Macaskill, Luqing Wang
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Publication number: 20110095977Abstract: An interactive input system comprises at least one imaging device having a field of view looking into a region of interest. At least one radiation source emits radiation into the region of interest. A bezel at least partially surrounds the region of interest. The bezel comprises a multi-angle reflecting structure to reflect emitted radiation from the at least one radiation source towards the at least one imaging device.Type: ApplicationFiled: October 23, 2009Publication date: April 28, 2011Applicant: SMART Technologies ULCInventor: CHARLES UNG
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Publication number: 20110050650Abstract: An input panel for an interactive input system comprises an optical waveguide; a first radiation source directing radiation into said optical waveguide, said radiation undergoing total internal reflection within said optical waveguide; a diffusion layer adjacent to and on one side of the optical waveguide, totally internally reflected light being frustrated and escaping the optical waveguide in response to pointer contacts on the diffusion layer; a second radiation source directing radiation towards another side of the optical waveguide that is opposite the one side; and at least one imaging device having a field of view looking at the optical waveguide and capturing image frames, wherein said first and second radiation sources are turned on and off in succession and wherein said first radiation source is turned off when said second radiation source is on and wherein said first radiation source is turned on when said second radiation source is off.Type: ApplicationFiled: September 1, 2010Publication date: March 3, 2011Applicant: SMART Technologies ULCInventors: Grant McGibney, Gerald Morrison, Charles Ung, Trevor Akitt, Ed Tse, Erik Benner, Jamie Duncalf
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Publication number: 20090146973Abstract: An apparatus for detecting a pointer includes a waveguide and a touch surface over the waveguide on which pointer contacts are to be made. At least one reflecting device extends along a first side of the waveguide and touch surface. The reflecting device defines an optical path between the interior of the waveguide and the region of interest above the touch surface. At least one imaging device looks across the touch surface and into the waveguide. The imaging device captures images of the region of interest and within the waveguide including reflections from the reflecting device.Type: ApplicationFiled: October 31, 2008Publication date: June 11, 2009Applicant: SMART TECHNOLOGIES ULCInventors: Chi Man Charles Ung, David Kenneth Booth, Roberto A.L. Sirotich
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Patent number: 7460110Abstract: An apparatus for detecting a pointer includes a waveguide and a touch surface over the waveguide on which pointer contacts are to be made. At least one reflecting device extends along a first side of the waveguide and touch surface. The reflecting device defines an optical path between the interior of the waveguide and the region of interest above the touch surface. At least one imaging device looks across the touch surface and into the waveguide. The imaging device captures images of the region of interest and within the waveguide including reflections from the reflecting device.Type: GrantFiled: April 29, 2004Date of Patent: December 2, 2008Assignee: Smart Technologies ULCInventors: Chi-Man Charles Ung, David Kenneth Boone, Roberto A. L. Sirotich
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Patent number: 7274356Abstract: An apparatus for detecting a pointer within a region of interest includes a first reflective element extending along a first side of the region of interest and reflecting light towards the region of interest. A second reflective element extends along a second side of the region of interest and reflects light towards the region of interest. The second side is joined to the first side to define a first corner. A non-reflective region generally in the plane of at least one of the first and second reflective elements is adjacent the first corner. At least one imaging device captures images of the region of interest including reflections from the first and second reflective elements.Type: GrantFiled: October 9, 2003Date of Patent: September 25, 2007Assignee: Smart Technologies Inc.Inventors: Chi Man Charles Ung, David Kenneth Booth, Stephen Worthington, Mark Andrew Fletcher, Roberto A. L. Sirotich