Patents by Inventor John Ernest Harden, Jr.
John Ernest Harden, Jr. 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: 11243408Abstract: A speckle reduction system is provided and includes a speckle reduction component and a control module. The speckle reduction component includes electrode layers and a liquid crystal layer. The liquid crystal layer is disposed between the electrode layers and configured to receive light from a coherent light source. The control module is configured to (i) supply a first voltage signal having a first voltage to the electrode layers to provide a first speckle pattern output, and (ii) supply a second voltage signal having a second voltage to the electrode layers to provide a second speckle pattern output, wherein the first voltage and the second voltage are greater than zero. The control module is configured to transition between providing the first voltage signal and the second voltage signal in less than at least one of half an integration time of a human eye or 8 milliseconds.Type: GrantFiled: February 5, 2020Date of Patent: February 8, 2022Assignees: GM GLOBAL TECHNOLOGY OPERATIONS LLC, KENT STATE UNIVERSITYInventors: John Ernest Harden, Jr., Liang-Chy Chien, Kai-Han Chang, Thomas A. Seder
-
Publication number: 20210239996Abstract: A speckle reduction system is provided and includes a speckle reduction component and a control module. The speckle reduction component includes electrode layers and a liquid crystal layer. The liquid crystal layer is disposed between the electrode layers and configured to receive light from a coherent light source. The control module is configured to (i) supply a first voltage signal having a first voltage to the electrode layers to provide a first speckle pattern output, and (ii) supply a second voltage signal having a second voltage to the electrode layers to provide a second speckle pattern output, wherein the first voltage and the second voltage are greater than zero. The control module is configured to transition between providing the first voltage signal and the second voltage signal in less than at least one of half an integration time of a human eye or 8 milliseconds.Type: ApplicationFiled: February 5, 2020Publication date: August 5, 2021Inventors: John Ernest HARDEN, JR., Liang-Chy CHIEN, Kai-Han CHANG, Thomas A. SEDER
-
Patent number: 9416487Abstract: A piezoelectric device includes a fiber mat comprising polymer fibers with ferroelectric particles embedded in the polymer fibers. The ferroelectric particles are oriented to generate a net polarization in the fiber mat. The ferroelectric particles may comprise barium titanate particles. The polymer fibers may comprise polylactic acid (PLA) fibers. The piezoelectric device may further include substrates sandwiching the fiber mat, and the fiber mat may be formed by electrospinning polymer fibers containing ferroelectric particles onto one of the substrates. The piezoelectric device may be a piezoelectric actuator configured to receive an input voltage applied across the fiber mat and to output a mechanical displacement in response to the voltage, or the piezoelectric device may be configured to output a voltage in response to a mechanical force applied to the fiber mat.Type: GrantFiled: October 11, 2013Date of Patent: August 16, 2016Assignee: Kent State UniversityInventors: Antal I. Jakli, Ebru Aylin Buyuktanir, John L. West, Jason Morvan, John Ernest Harden, Jr.
-
Publication number: 20150102704Abstract: A piezoelectric device includes a fiber mat comprising polymer fibers with ferroelectric particles embedded in the polymer fibers. The ferroelectric particles are oriented to generate a net polarization in the fiber mat. The ferroelectric particles may comprise barium titanate particles. The polymer fibers may comprise polylactic acid (PLA) fibers. The piezoelectric device may further include substrates sandwiching the fiber mat, and the fiber mat may be formed by electrospinning polymer fibers containing ferroelectric particles onto one of the substrates. The piezoelectric device may be a piezoelectric actuator configured to receive an input voltage applied across the fiber mat and to output a mechanical displacement in response to the voltage, or the piezoelectric device may be configured to output a voltage in response to a mechanical force applied to the fiber mat.Type: ApplicationFiled: October 11, 2013Publication date: April 16, 2015Applicant: KENT STATE UNIVERSITYInventors: Antal I. Jakli, Ebru Aylin Buyuktanir, John L. West, Jason Morvan, John Ernest Harden, JR.
-
Patent number: 8595923Abstract: There are provided methods for creating energy conversion devices based on the giant flexoelectric effect in non-calamitic liquid crystals. By preparing a substance comprising at least one type of non-calamitic liquid crystal molecules and stabilizing the substance to form a mechanically flexible material, flexible conductive electrodes may be applied to the material to create an electro-mechanical energy conversion device which relies on the giant flexoelectric effect to produce electrical and/or mechanical energy that is usable in such applications as, for example, power sources, energy dissipation, sensors/transducers, and actuators.Type: GrantFiled: March 19, 2010Date of Patent: December 3, 2013Assignee: Kent State UniversityInventors: Antal I. Jakli, John Ernest Harden, Jr., Samuel Sprunt, James T. Gleeson, Peter Palffy-Muhoray
-
Publication number: 20110309305Abstract: A conductive, durable, peelable and flexible polymeric composition such as a coating can be utilized as an electrode sheet or substrate for organic and polymer light emitting diodes, for organic transistors, medical electrodes, and the like. The conductive polymeric composition is a blend of a conductive polymer blend and a peelable polymer blend wherein the conductive polymer comprises a negative-charged accepting polymer and a positive-charged accepting polymer and wherein the peelable polymer blend comprises a water soluble polymer, a polyalkylene oxide, and an alkyl glycol.Type: ApplicationFiled: October 19, 2010Publication date: December 22, 2011Applicant: KENT STATE UNIVERSITYInventors: Antal Istvan Jákli, John Ernest Harden, JR., Wilder G. Iglesias Gonzalez
-
Patent number: 8035279Abstract: There are provided methods for creating energy conversion devices based on the giant flexoelectric effect in non-calamitic liquid crystals. By preparing a substance comprising at least one type of non-calamitic liquid crystal molecules and stabilizing the substance to form a mechanically flexible material, flexible conductive electrodes may be applied to the material to create an electro-mechanical energy conversion device which relies on the giant flexoelectric effect to produce electrical and/or mechanical energy that is usable in such applications as, for example, power sources, energy dissipation, sensors/transducers, and actuators.Type: GrantFiled: March 19, 2010Date of Patent: October 11, 2011Assignee: Kent State UniversityInventors: Antal I. Jakli, John Ernest Harden, Jr., Samuel Sprunt, James T. Gleeson, Peter Palffy-Muhoray
-
Patent number: 7832093Abstract: There are provided methods for creating energy conversion devices based on the giant flexoelectric effect in non-calamitic liquid crystals. By preparing a substance comprising at least one type of non-calamitic liquid crystal molecules and stabilizing the substance to form a mechanically flexible material, flexible conductive electrodes may be applied to the material to create an electro-mechanical energy conversion device which relies on the giant flexoelectric effect to produce electrical and/or mechanical energy that is usable in such applications as, for example, power sources, energy dissipation, sensors/transducers, and actuators.Type: GrantFiled: June 11, 2007Date of Patent: November 16, 2010Assignee: Kent State UniversityInventors: Antal I. Jakli, John Ernest Harden, Jr., Samuel Sprunt, James T. Gleeson, Peter Palffy-Muhoray
-
Publication number: 20100207493Abstract: There are provided methods for creating energy conversion devices based on the giant flexoelectric effect in non-calamitic liquid crystals. By preparing a substance comprising at least one type of non-calamitic liquid crystal molecules and stabilizing the substance to form a mechanically flexible material, flexible conductive electrodes may be applied to the material to create an electro-mechanical energy conversion device which relies on the giant flexoelectric effect to produce electrical and/or mechanical energy that is usable in such applications as, for example, power sources, energy dissipation, sensors/transducers, and actuators.Type: ApplicationFiled: March 19, 2010Publication date: August 19, 2010Applicant: KENT STATE UNIVERSITYInventors: Antal I. Jakli, John Ernest Harden, JR., Samuel Sprunt, James T. Gleeson
-
Publication number: 20100182026Abstract: There are provided methods for creating energy conversion devices based on the giant flexoelectric effect in non-calamitic liquid crystals. By preparing a substance comprising at least one type of non-calamitic liquid crystal molecules and stabilizing the substance to form a mechanically flexible material, flexible conductive electrodes may be applied to the material to create an electro-mechanical energy conversion device which relies on the giant flexoelectric effect to produce electrical and/or mechanical energy that is usable in such applications as, for example, power sources, energy dissipation, sensors/transducers, and actuators.Type: ApplicationFiled: March 19, 2010Publication date: July 22, 2010Applicant: KENT STATE UNIVERSITYInventors: Antal I. Jakli, John Ernest Harden, JR., Samuel Sprunt, James T. Gleeson
-
Publication number: 20080303376Abstract: Devices and methods for energy conversion based on the giant flexoelectric effect in non-calamitic liquid crystals. By preparing a substance comprising at least one type of non-calamitic liquid crystal molecules and stabilizing the substance to form a mechanically flexible material, flexible conductive electrodes may be applied to the material to create an electro-mechanical energy conversion device which relies on the giant flexoelectric effect to produce electrical and/or mechanical energy that is usable in such applications as, for example, power sources, energy dissipation, sensors/transducers, and actuators. The ability to directly and accurately measure the giant flexoelectric effect for different types of non-calamitic liquid crystal molecules is important for identifying molecules that may be effective for particular applications.Type: ApplicationFiled: June 11, 2007Publication date: December 11, 2008Applicant: KENT STATE UNIVERSITYInventors: Antal I. JAKLI, John Ernest HARDEN, Jr., Samuel SPRUNT, James T. GLEESON