Patents by Inventor Stephan R. Clark
Stephan R. Clark 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: 9651425Abstract: A color sensor array includes a plurality of sensors. Each of the plurality of sensors has a width dimension and a length dimension that is elongated with respect to the width dimension. The length dimensions of the sensors are substantially equal to one another and parallel to an illumination plane. Each of the plurality of sensors includes a face defined by opposing first and second elongated sides and opposing first and second non-elongated sides. The first non-elongated sides of the plurality of sensors are aligned with one another along an axis that is substantially perpendicular to the illumination plane.Type: GrantFiled: February 27, 2009Date of Patent: May 16, 2017Assignee: Hewlett-Packard Development Company, L.P.Inventors: Stephan R. Clark, Brett E. Dahlgren
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Patent number: 9636913Abstract: Light redirected by liquid droplets ejected from nozzles (30) of a plurality of columns (26, 226, 227) of nozzles (30) is sensed to detect a vertical trajectory of the liquid droplets for each of the nozzles (30).Type: GrantFiled: April 9, 2012Date of Patent: May 2, 2017Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventor: Stephan R. Clark
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Patent number: 9522527Abstract: A sensor images drops ejected from a printhead nozzle. The sensor has two parallel spaced-apart rows of imaging pixels. In one example, a lens projects an image of a drop ejected from a printhead onto the rows sequentially as the drop travels along a trajectory.Type: GrantFiled: October 30, 2013Date of Patent: December 20, 2016Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Stephan R. Clark, Alexander Govyadinov, Jonathan James Mott, Lorraine Theresa Widmann
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Publication number: 20160250848Abstract: A sensor images drops ejected from a printhead nozzle. The sensor has two parallel spaced-apart rows of imaging pixels. In one example, a lens projects an image of a drop ejected from a printhead onto the rows sequentially as the drop travels along a trajectory.Type: ApplicationFiled: October 30, 2013Publication date: September 1, 2016Applicant: HEWLETT PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Stephan R. CLARK, Alexander Govyadinov, Jonthan James Mott, Lorraine Theresa Widmann
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Patent number: 9291756Abstract: Embodiments disclosed herein relate to a filter (100). In one embodiment, the filter includes a pattern (120). The pattern may reflect or fluoresce non-visible light.Type: GrantFiled: January 28, 2011Date of Patent: March 22, 2016Assignee: Hewlett-Packard Development Company, L.P.Inventors: Daniel I. Croft, Barry T Phillips, Brad Benson, Cary G Addington, Angus Wu, Stephan R Clark, Guy Adams, James Stasiak
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Publication number: 20140347420Abstract: Light redirected by liquid droplets ejected from nozzles (30) of a plurality of columns (26, 226, 227) of nozzles (30) is sensed to detect a vertical trajectory of the liquid droplets for each of the nozzles (30).Type: ApplicationFiled: April 9, 2012Publication date: November 27, 2014Inventor: Stephan R. Clark
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Publication number: 20140216692Abstract: Heat dissipating devices and methods are disclosed. An example method may include evaporating a liquid working fluid, a resulting vapor phase to absorb heat. The method may also include condensing the vaporized working fluid back to a liquid phase to release the heat to an external environment. The method may also include returning the liquid working fluid back to the evaporation zone.Type: ApplicationFiled: September 19, 2011Publication date: August 7, 2014Inventors: Frank Bretl, Stephan R. Clark
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Patent number: 8687193Abstract: A color measurement device includes a light pipe and a light source. The light pipe is oriented length-wise towards a color sample surface along a first axis that is non-perpendicular to the surface. A color sample is positioned on the surface. The light pipe has a near opening, a far opening, and a face at the far opening. The near opening is closer to the color sample than the far opening. The light source is positioned near the far opening of the light pipe, and is to output light along a second axis and into the light pipe at the far opening. The light reflects off the surface after exiting the light pipe at the near opening. The second axis is non-perpendicular to the face of the light pipe at the far opening. The light non-uniformly illuminates the color sample after exiting the light pipe at the near opening.Type: GrantFiled: October 31, 2008Date of Patent: April 1, 2014Assignee: Hewlett-Packard Development Company, L.P.Inventors: Brett E. Dahlgren, Stephan R. Clark
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Patent number: 8665438Abstract: A color sensing apparatus includes an optical system that produces a spatially uniform light beam independent of the use of a diffusion chamber, and a color sensor that senses reflected light of a reflection of the spatially uniform light beam, wherein the optical system includes a light integrator with a tapered inlet surface and a lens secured to an exit plane thereof.Type: GrantFiled: January 30, 2013Date of Patent: March 4, 2014Assignee: Hewlett-Packard Development Company, L.P.Inventors: Stephan R. Clark, Brett E. Dahlgren
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Publication number: 20140034112Abstract: Apparatus and methods are provided for use with solar energy. An optical concentrator and splitter (OCS) includes a non-planar bottom surface having symmetrical halves, each half defined by an off-axis section of a parabola. The bottom surface bears a dielectric surface treatment. The OCS is configured to concentrate a first spectral portion of photonic energy through respective side surfaces, and to concentrate a second spectral portion through the bottom surface. Targets such as photovoltaic cells or others receive the concentrated first and second spectral portions, respectively.Type: ApplicationFiled: May 26, 2011Publication date: February 6, 2014Inventors: Scott Lerner, Stephan R. Clark, John P. Whitlock
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Publication number: 20130334441Abstract: Embodiments disclosed herein relate to a filter (100). In one embodiment, the filter includes a pattern (120). The pattern may reflect or fluoresce non-visible light.Type: ApplicationFiled: January 28, 2011Publication date: December 19, 2013Inventors: Daniel I. Croft, Bany T. Phillips, Brad Benson, Cary G. Addington, Angus Wu, Stephan R. Clark, Guy Adams
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Patent number: 8513584Abstract: Apparatus are provided for use in photovoltaic systems. A photovoltaic array includes a rigid transparent material supporting a flexible material there beneath. Numerous photovoltaic cells are supported by the flexible material and are electrically coupled to circuit pathways borne there on. A positioner operates to shift the flexible material thus adjusting respective angular relationships between the photovoltaic cells and the overlying transparent material. Photovoltaic cells are reoriented in accordance with daily or seasonal variations in the suns position by way of the present teachings.Type: GrantFiled: December 14, 2009Date of Patent: August 20, 2013Assignee: Hewlett-Packard Development Company, L.P.Inventors: Stephan R. Clark, Karl S. Weibezahn
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Patent number: 8513833Abstract: A first electrical path has a terminal, and a second electrical path has a terminal. First photovoltaic (PV) dies are electrically connected within the first electrical path. Each first PV die is adapted to convert light having a first wavelength range to electrical energy. Second PV dies are electrically connected within the second electrical path. Each second PV die is adapted to convert light having a second wavelength range different than the first wavelength range to electrical energy. A circuit is electrically connected between the terminals of the first and the second electrical paths to limit an absolute voltage difference between the terminals to no greater than a threshold voltage.Type: GrantFiled: June 20, 2010Date of Patent: August 20, 2013Assignee: Hewlett-Packard Development Company, L.P.Inventors: Andrew L. Van Brocklin, Stephan R. Clark
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Publication number: 20130098427Abstract: An example of this disclosure relates to paraboloid reflectors. Another example of this disclosure relates to a collector panel including collector cells and paraboloid reflectors.Type: ApplicationFiled: October 25, 2011Publication date: April 25, 2013Inventors: Frank Bretl, Stephan R. Clark, Scott Lerner
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Publication number: 20130078441Abstract: A substrate for an optical film stack is disclosed herein. A method of preparing a substrate for an optical film stack includes placing a polymer base material in a vacuum chamber, the polymer base material having a glass transition temperature (Tg) that is lower than a deposition temperature of an optical film layer to be deposited on the substrate to form the optical film stack. The method further includes depositing a capping layer on the polymer base material, the depositing taking place at a temperature that is less than or equal to 10% above the Tg of the polymer base material.Type: ApplicationFiled: September 28, 2011Publication date: March 28, 2013Inventors: James Elmer Abbott, JR., Todd A. Berdahl, Stephan R. Clark
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Publication number: 20130068281Abstract: Offset light concentrating is disclosed. An example method includes providing a parabolic optic having an offset reflective surface for incident light. The method also includes offsetting a photovoltaic device from a path of the incident light. The method also includes concentrating light from the reflective surface of the parabolic optic on the photovoltaic device.Type: ApplicationFiled: September 19, 2011Publication date: March 21, 2013Inventor: Stephan R. Clark
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Patent number: 8390810Abstract: A color sensing apparatus (10) includes an optical system (16) that produces a spatially uniform light beam (18).Type: GrantFiled: December 20, 2007Date of Patent: March 5, 2013Assignee: Hewlett-Packard Development Company, L.P.Inventors: Stephan R. Clark, Brett E. Dahlgren
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Publication number: 20120325287Abstract: Apparatus and methods are provided for use with solar energy. A curved surface includes integral support ribs extending away from a backside thereof. A dichroic surface treatment is born on the curved surface to define a curved dichroic surface. A curved reflector is disposed apart from the backside of the curved dichroic surface. Photovoltaic cells can be disposed at respective photonic energy concentration regions defined by the curved dichroic surface and the curved reflector.Type: ApplicationFiled: June 27, 2011Publication date: December 27, 2012Inventor: Stephan R. Clark
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Patent number: 8330955Abstract: A color detector includes a light source, a photodiode, and a filter tuned to only allow light of a specific color to pass through to the photodiode. When the light reaches the photodiode, the photodiode outputs a current that indicates that the color is present in the light. The filter may include a pair of partially reflective layers consisting of a reflective metal, such as silver. To prevent the metal from oxidizing or reacting with the environment, the partially reflective layers may be coated with a protective layer, such as aluminum nitride. The color detector may further include a color enhancing layer. Finally, the color detector may include a capping layer. Accordingly, the color detector provided herein allows for the filter to use metals for partially reflective layers that would normally oxidize, as well as detect light of a specific spectrum of wavelengths.Type: GrantFiled: February 12, 2008Date of Patent: December 11, 2012Assignee: Hewlett-Packard Development Company, L.P.Inventors: Stephan R. Clark, Michael G. Monroe, Melinda M. Valencia, Daniel A. Kearl
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Publication number: 20120305050Abstract: Apparatus and methods are provided for use with solar energy. An optical material defines light-directing surface features, each configured to direct incident photonic energy away from a respective dead-space. Photovoltaic cells or other entities receive photonic energy propagating through the optical material, including that portion being directed by the light-directing surface features. Various entities can be located within the dead-spaces defined between the photovoltaic cells.Type: ApplicationFiled: May 31, 2011Publication date: December 6, 2012Inventors: Scott Lerner, John P Whitlock, Stephan R Clark