Patents by Inventor Michael D. McCreary
Michael D. McCreary 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: 11854448Abstract: A method for driving electro-optic displays including electro-optic material disposed between a common electrode and a backplane. The backplane includes an array of pixel electrodes, each coupled to a transistor. A display controller applies waveforms to the pixel electrodes. The method includes applying first measurement waveforms to a first portion of the pixel electrodes. During each frame of the first measurement waveforms, the same time-dependent voltages are applied to each pixel electrode of the first portion of pixel electrodes. The method includes determining the impedance of the electro-optic material in proximity to the first portion of pixel electrodes based on a measurement of the current flowing through a current measurement circuit and the time-dependent voltages applied to each pixel electrode during the first measurement waveforms, and selecting driving waveforms based on the impedance of the electro-optic material in proximity to the first portion of pixel electrodes.Type: GrantFiled: December 27, 2022Date of Patent: December 26, 2023Assignee: E Ink CorporationInventors: Karl Raymond Amundson, Teck Ping Sim, Michael D. McCreary, Yi Lu, Kosta Ladavac
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Patent number: 11835835Abstract: An electro-optic device comprising electrophoretic medium including a dispersion of a plurality of particles in a fluid configured to migrate within the fluid in a direction responsive to an applied electric field. The plurality of particles include a first type of particles having a first charge of a first charge polarity, a second type of particles having a second charge of a second charge polarity, and a third type of particles having a third charge of the second charge polarity. The first charge polarity is opposite to the second charge polarity, and the third type of particles are configured to migrate within the fluid in a direction responsive to an applied magnetic field gradient.Type: GrantFiled: October 28, 2022Date of Patent: December 5, 2023Assignee: E Ink CorporationInventors: Michael D. McCreary, Richard J. Paolini, Jr., Stephen J. Telfer, Samantha Morrill
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Publication number: 20230343260Abstract: A method for driving electro-optic displays including electro-optic material disposed between a common electrode and a backplane. The backplane includes an array of pixel electrodes, each coupled to a transistor. A display controller applies waveforms to the pixel electrodes. The method includes applying first measurement waveforms to a first portion of the pixel electrodes. During each frame of the first measurement waveforms, the same time-dependent voltages are applied to each pixel electrode of the first portion of pixel electrodes. The method includes determining the impedance of the electro-optic material in proximity to the first portion of pixel electrodes based on a measurement of the current flowing through a current measurement circuit and the time-dependent voltages applied to each pixel electrode during the first measurement waveforms, and selecting driving waveforms based on the impedance of the electro-optic material in proximity to the first portion of pixel electrodes.Type: ApplicationFiled: June 30, 2023Publication date: October 26, 2023Inventors: Karl Raymond AMUNDSON, Teck Ping SIM, Michael D. MCCREARY, Yi LU
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Publication number: 20230206796Abstract: A method for driving electro-optic displays including electro-optic material disposed between a common electrode and a backplane. The backplane includes an array of pixel electrodes, each coupled to a transistor. A display controller applies waveforms to the pixel electrodes. The method includes applying first measurement waveforms to a first portion of the pixel electrodes. During each frame of the first measurement waveforms, the same time-dependent voltages are applied to each pixel electrode of the first portion of pixel electrodes. The method includes determining the impedance of the electro-optic material in proximity to the first portion of pixel electrodes based on a measurement of the current flowing through a current measurement circuit and the time-dependent voltages applied to each pixel electrode during the first measurement waveforms, and selecting driving waveforms based on the impedance of the electro-optic material in proximity to the first portion of pixel electrodes.Type: ApplicationFiled: December 27, 2022Publication date: June 29, 2023Inventors: Karl Raymond AMUNDSON, Teck Ping SIM, Michael D. MCCREARY, Yi LU, Kosta LADAVAC
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Publication number: 20230048575Abstract: An electro-optic device comprising electrophoretic medium including a dispersion of a plurality of particles in a fluid configured to migrate within the fluid in a direction responsive to an applied electric field. The plurality of particles include a first type of particles having a first charge of a first charge polarity, a second type of particles having a second charge of a second charge polarity, and a third type of particles having a third charge of the second charge polarity. The first charge polarity is opposite to the second charge polarity, and the third type of particles are configured to migrate within the fluid in a direction responsive to an applied magnetic field gradient.Type: ApplicationFiled: October 28, 2022Publication date: February 16, 2023Inventors: Michael D. MCCREARY, Richard J. PAOLINI, Jr., Stephen J. TELFER, Samantha MORRILL
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Patent number: 11513413Abstract: An electro-optic device comprising electrophoretic medium including a dispersion of a plurality of particles in a fluid configured to migrate within the fluid in a direction responsive to an applied electric field. The plurality of particles include a first type of particles having a first charge of a first charge polarity, a second type of particles having a second charge of a second charge polarity, and a third type of particles having a third charge of the second charge polarity. The first charge polarity is opposite to the second charge polarity, and the third type of particles are configured to migrate within the fluid in a direction responsive to an applied magnetic field gradient.Type: GrantFiled: October 28, 2019Date of Patent: November 29, 2022Assignee: E Ink CorporationInventors: Michael D. McCreary, Richard J. Paolini, Jr., Stephen J. Telfer, Samantha Morrill
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Patent number: 11250794Abstract: A dielectrophoretic display is shifted from a low frequency closed state to a high frequency open state via at least one, and preferably several, intermediate frequency states; the use of such multiple frequency steps reduces flicker during the transition. A second type of dielectrophoretic display has a light-transmissive electrode through which the dielectrophoretic medium can be viewed and a conductor connected to the light-transmissive electrode at several points to reduce voltage variations within the light-transmissive electrode.Type: GrantFiled: July 7, 2016Date of Patent: February 15, 2022Assignee: E Ink CorporationInventors: George G. Harris, Richard J. Paolini, Jr., Thomas H. Whitesides, Michael D. McCreary, Charles Howie Honeyman
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Patent number: 10976634Abstract: Electro-optic, especially electrophoretic, displays are used in variety of architectural and furniture applications, including a tile (100) comprising an electro-optic layer (110) capable of changing the color of the file, front and multiple rear electrodes and a light-transmissive polymeric layer (102), the exposed surface of which is textured to provide a plurality of facets inclined to the plane of the tile (100), the rear electrodes being aligned with the facets. A variable color writable board is also provided.Type: GrantFiled: November 21, 2018Date of Patent: April 13, 2021Assignee: E Ink CorporationInventors: Richard J. Paolini, Jr., Michael D. McCreary, Carl Taussig, Paul Apen, George G. Harris, Sunil Krishna Sainis, Joseph Fillion
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Publication number: 20200133089Abstract: An electro-optic device comprising electrophoretic medium including a dispersion of a plurality of particles in a fluid configured to migrate within the fluid in a direction responsive to an applied electric field. The plurality of particles include a first type of particles having a first charge of a first charge polarity, a second type of particles having a second charge of a second charge polarity, and a third type of particles having a third charge of the second charge polarity. The first charge polarity is opposite to the second charge polarity, and the third type of particles are configured to migrate within the fluid in a direction responsive to an applied magnetic field gradient.Type: ApplicationFiled: October 28, 2019Publication date: April 30, 2020Inventors: Michael D. MCCREARY, Richard J. PAOLINI, Jr., Stephen J. TELFER, Samantha MORRILL
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Publication number: 20190272791Abstract: Video displays using relatively low frame rates of about 10 to about 20 frames per second, but having acceptable video quality are described. The displays may use bistable media, and may be driven such that the medium, when driven, changes its optical properties continuously during the driving of each frame. The displays may use an electro-optic medium such that the frame period is from about 50 to about 200 per cent of the switching time of the electro-optic medium at the driving voltage used.Type: ApplicationFiled: May 16, 2019Publication date: September 5, 2019Inventors: George G. HARRIS, Shamus Ford PATRY, Michael D. MCCREARY
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Patent number: 10372008Abstract: A wavelength selective reflection display (10) comprises a wavelength selective reflection medium (20) and a backing member (30) having a first, non-reflective optical state, and a second, reflective optical state. Both the wavelength selective reflection medium (20) and the backing member (30) are divided into pixels (40, 50, 60), and the backing member (30) is switchable between its first and second optical states on a pixel-by-pixel basis. The pixels of the backing member (30) are substantially aligned with those of the wavelength selective reflection medium (20).Type: GrantFiled: May 18, 2012Date of Patent: August 6, 2019Assignee: E Ink CorporationInventors: Stephen J. Telfer, Richard J. Paolini, Jr., Michael D. McCreary, David John Cole
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Patent number: 10324354Abstract: A first electro-optic display comprises first and second substrates, and an adhesive layer and a layer of electro-optic material disposed between the first and second substrates, the adhesive layer comprising a mixture of a polymeric adhesive material and a hydroxyl containing polymer having a number average molecular weight not greater than about 5000. A second electro-optic display is similar to the first but has an adhesive layer comprising a thermally-activated cross-linking agent to reduce void growth when the display is subjected to temperature changes. A third electro-optic display, intended for writing with a stylus or similar instrument, is produced by forming a layer of an electro-optic material on an electrode; depositing a substantially solvent-free polymerizable liquid material over the electro-optic material; and polymerizing the polymerizable liquid material.Type: GrantFiled: January 10, 2017Date of Patent: June 18, 2019Assignee: E Ink CorporationInventors: Richard J. Paolini, Jr., Michael D. McCreary, Charles Howie Honeyman, Bin Wu
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Patent number: 10319313Abstract: Video displays using relatively low frame rates of about 10 to about 20 frames per second, but having acceptable video quality are described. The displays may use bistable media, and may be driven such that the medium, when driven, changes its optical properties continuously during the driving of each frame. The displays may use an electro-optic medium such that the frame period is from about 50 to about 200 per cent of the switching time of the electro-optic medium at the driving voltage used.Type: GrantFiled: May 21, 2008Date of Patent: June 11, 2019Assignee: E Ink CorporationInventors: George G. Harris, Shamus Ford Patry, Michael D. McCreary
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Publication number: 20190094646Abstract: Electro-optic, especially electrophoretic, displays are used in variety of architectural and furniture applications, including a tile (100) comprising an electro-optic layer (110) capable of changing the color of the file, front and multiple rear electrodes and a light-transmissive polymeric layer (102), the exposed surface of which is textured to provide a plurality of facets inclined to the plane of the tile (100), the rear electrodes being aligned with the facets. A variable color writable board is also provided.Type: ApplicationFiled: November 21, 2018Publication date: March 28, 2019Inventors: Richard J. PAOLINI, Jr., Michael D. MCCREARY, Carl TAUSSIG, Paul APEN, George G. HARRIS, Sunil Krishna SAINIS, Joseph FILLION
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Patent number: 10175550Abstract: Electro-optic, especially electrophoretic, displays are used in variety of architectural and furniture applications, including a tile (100) comprising an electro-optic layer (110) capable of changing the color of the file, front and multiple rear electrodes and a light-transmissive polymeric layer (102), the exposed surface of which is textured to provide a plurality of facets inclined to the plane of the tile (100), the rear electrodes being aligned with the facets. A variable color writable board is also provided.Type: GrantFiled: November 6, 2015Date of Patent: January 8, 2019Assignee: E Ink CorporationInventors: Richard J. Paolini, Jr., Michael D. McCreary, Carl Taussig, Paul Apen, George G. Harris, Joseph Fillion
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Patent number: 10048564Abstract: A first electro-optic display comprises first and second substrates, and an adhesive layer and a layer of electro-optic material disposed between the first and second substrates, the adhesive layer comprising a mixture of a polymeric adhesive material and a hydroxyl containing polymer having a number average molecular weight not greater than about 5000. A second electro-optic display is similar to the first but has an adhesive layer comprising a thermally-activated cross-linking agent to reduce void growth when the display is subjected to temperature changes. A third electro-optic display, intended for writing with a stylus or similar instrument, is produced by forming a layer of an electro-optic material on an electrode; depositing a substantially solvent-free polymerizable liquid material over the electro-optic material; and polymerizing the polymerizable liquid material.Type: GrantFiled: April 22, 2015Date of Patent: August 14, 2018Assignee: E Ink CorporationInventors: Richard J. Paolini, Jr., Michael D. McCreary, Charles Howie Honeyman, Bin Wu
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Patent number: 10048563Abstract: A first electro-optic display comprises first and second substrates, and an adhesive layer and a layer of electro-optic material disposed between the first and second substrates, the adhesive layer comprising a mixture of a polymeric adhesive material and a hydroxyl containing polymer having a number average molecular weight not greater than about 5000. A second electro-optic display is similar to the first but has an adhesive layer comprising a thermally-activated cross-linking agent to reduce void growth when the display is subjected to temperature changes. A third electro-optic display, intended for writing with a stylus or similar instrument, is produced by forming a layer of an electro-optic material on an electrode; depositing a substantially solvent-free polymerizable liquid material over the electro-optic material; and polymerizing the polymerizable liquid material.Type: GrantFiled: April 22, 2015Date of Patent: August 14, 2018Assignee: E Ink CorporationInventors: Richard J. Paolini, Jr., Michael D. McCreary, Charles Howie Honeyman, Bin Wu
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Patent number: 9921422Abstract: Various types of edge seals for protecting electro-optic displays against environmental contaminants are described. In one type of seal, the electro-optic layer is sandwiched between a backplane and a protective sheet and a sealing material extends between the backplane and the protective sheet. In other seals, the protective sheet is secured to the backplane or to a second protective sheet adjacent the backplane. The electro-optic layer can also be sealed between two layers of adhesive or between one layer of adhesive and the backplane. Other seals make use of flexible tapes extending around the periphery of the display.Type: GrantFiled: December 15, 2016Date of Patent: March 20, 2018Assignee: E Ink CorporationInventors: Guy M. Danner, Shamus Ford Patry, Charles Howie Honeyman, Thomas H. Whitesides, Michael D. McCreary, Gregg M. Duthaler
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Publication number: 20170168370Abstract: A dielectrophoretic display has a substrate having walls defining a cavity, the cavity having a viewing surface and a side wall inclined to the viewing surface. A fluid is contained within the cavity; and a plurality of particles are present in the fluid. There is applied to the substrate an electric field effective to cause dielectrophoretic movement of the particles so that the particles occupy only a minor proportion of the viewing surface.Type: ApplicationFiled: February 27, 2017Publication date: June 15, 2017Inventors: Karl R. Amundson, Alexandros Cosmos Arango, Joseph M. Jacobson, Thomas H. Whitesides, Michael D. McCreary, Richard J. Paolini, JR.
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Publication number: 20170131612Abstract: A first electro-optic display comprises first and second substrates, and an adhesive layer and a layer of electro-optic material disposed between the first and second substrates, the adhesive layer comprising a mixture of a polymeric adhesive material and a hydroxyl containing polymer having a number average molecular weight not greater than about 5000. A second electro-optic display is similar to the first but has an adhesive layer comprising a thermally-activated cross-linking agent to reduce void growth when the display is subjected to temperature changes. A third electro-optic display, intended for writing with a stylus or similar instrument, is produced by forming a layer of an electro-optic material on an electrode; depositing a substantially solvent-free polymerizable liquid material over the electro-optic material; and polymerizing the polymerizable liquid material.Type: ApplicationFiled: January 10, 2017Publication date: May 11, 2017Inventors: Richard J. PAOLINI, JR., Michael D. MCCREARY, Charles Howie HONEYMAN, Bin WU