Patents by Inventor Theodore A. Sjodin
Theodore A. Sjodin 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: 11657773Abstract: A variety of methods for driving electro-optic displays so as to reduce visible artifacts are described. Such methods include (a) applying a first drive scheme to a non-zero minor proportion of the pixels of the display and a second drive scheme to the remaining pixels, the pixels using the first drive scheme being changed at each transition; (b) using two different drive schemes on different groups of pixels so that pixels in differing groups undergoing the same transition will not experience the same waveform; (c) applying either a balanced pulse pair or a top-off pulse to a pixel undergoing a white-to-white transition and lying adjacent a pixel undergoing a visible transition; (d) driving extra pixels where the boundary between a driven and undriven area would otherwise fall along a straight line; and (e) driving a display with both DC balanced and DC imbalanced drive schemes, maintaining an impulse bank value for the DC imbalance and modifying transitions to reduce the impulse bank value.Type: GrantFiled: August 30, 2022Date of Patent: May 23, 2023Assignee: E Ink CorporationInventors: Karl Raymond Amundson, Matthew J. Aprea, Kenneth R. Crounse, Demetrious Mark Harrington, Jason Lin, Theodore A. Sjodin, Chia-Chen Su
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Publication number: 20220415268Abstract: A variety of methods for driving electro-optic displays so as to reduce visible artifacts are described. Such methods include (a) applying a first drive scheme to a non-zero minor proportion of the pixels of the display and a second drive scheme to the remaining pixels, the pixels using the first drive scheme being changed at each transition; (b) using two different drive schemes on different groups of pixels so that pixels in differing groups undergoing the same transition will not experience the same waveform; (c) applying either a balanced pulse pair or a top-off pulse to a pixel undergoing a white-to-white transition and lying adjacent a pixel undergoing a visible transition; (d) driving extra pixels where the boundary between a driven and undriven area would otherwise fall along a straight line; and (e) driving a display with both DC balanced and DC imbalanced drive schemes, maintaining an impulse bank value for the DC imbalance and modifying transitions to reduce the impulse bank value.Type: ApplicationFiled: August 30, 2022Publication date: December 29, 2022Inventors: Karl Raymond AMUNDSON, Matthew J. APREA, Kenneth R. CROUNSE, Demetrious Mark HARRINGTON, Jason LIN, Theodore A. SJODIN, Chia-Chen SU
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Patent number: 11462183Abstract: A variety of methods for driving electro-optic displays so as to reduce visible artifacts are described. Such methods include (a) applying a first drive scheme to a non-zero minor proportion of the pixels of the display and a second drive scheme to the remaining pixels, the pixels using the first drive scheme being changed at each transition; (b) using two different drive schemes on different groups of pixels so that pixels in differing groups undergoing the same transition will not experience the same waveform; (c) applying either a balanced pulse pair or a top-off pulse to a pixel undergoing a white-to-white transition and lying adjacent a pixel undergoing a visible transition; (d) driving extra pixels where the boundary between a driven and undriven area would otherwise fall along a straight line; and (e) driving a display with both DC balanced and DC imbalanced drive schemes, maintaining an impulse bank value for the DC imbalance and modifying transitions to reduce the impulse bank value.Type: GrantFiled: July 30, 2021Date of Patent: October 4, 2022Assignee: E Ink CorporationInventors: Karl Raymond Amundson, Matthew J. Aprea, Kenneth R. Crounse, Demetrious Mark Harrington, Jason Lin, Theodore A. Sjodin, Chia-Chen Su
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Publication number: 20210375217Abstract: A variety of methods for driving electro-optic displays so as to reduce visible artifacts are described. Such methods include (a) applying a first drive scheme to a non-zero minor proportion of the pixels of the display and a second drive scheme to the remaining pixels, the pixels using the first drive scheme being changed at each transition; (b) using two different drive schemes on different groups of pixels so that pixels in differing groups undergoing the same transition will not experience the same waveform; (c) applying either a balanced pulse pair or a top-off pulse to a pixel undergoing a white-to-white transition and lying adjacent a pixel undergoing a visible transition; (d) driving extra pixels where the boundary between a driven and undriven area would otherwise fall along a straight line; and (e) driving a display with both DC balanced and DC imbalanced drive schemes, maintaining an impulse bank value for the DC imbalance and modifying transitions to reduce the impulse bank value.Type: ApplicationFiled: July 30, 2021Publication date: December 2, 2021Inventors: Karl Raymond AMUNDSON, Matthew J. APREA, Kenneth R. CROUNSE, Demetrious Mark HARRINGTON, Jason LIN, Theodore A. SJODIN, Chia-Chen SU
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Patent number: 11145261Abstract: A variety of methods for driving electro-optic displays so as to reduce visible artifacts are described. Such methods include (a) applying a first drive scheme to a non-zero minor proportion of the pixels of the display and a second drive scheme to the remaining pixels, the pixels using the first drive scheme being changed at each transition; (b) using two different drive schemes on different groups of pixels so that pixels in differing groups undergoing the same transition will not experience the same waveform; (c) applying either a balanced pulse pair or a top-off pulse to a pixel undergoing a white-to-white transition and lying adjacent a pixel undergoing a visible transition; (d) driving extra pixels where the boundary between a driven and undriven area would otherwise fall along a straight line; and (e) driving a display with both DC balanced and DC imbalanced drive schemes, maintaining an impulse bank value for the DC imbalance and modifying transitions to reduce the impulse bank value.Type: GrantFiled: April 21, 2020Date of Patent: October 12, 2021Assignee: E Ink CorporationInventors: Karl Raymond Amundson, Matthew J. Aprea, Kenneth R. Crounse, Demetrious Mark Harrington, Jason Lin, Theodore A. Sjodin, Chia-Chen Su
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Publication number: 20200265790Abstract: A variety of methods for driving electro-optic displays so as to reduce visible artifacts are described. Such methods include (a) applying a first drive scheme to a non-zero minor proportion of the pixels of the display and a second drive scheme to the remaining pixels, the pixels using the first drive scheme being changed at each transition; (b) using two different drive schemes on different groups of pixels so that pixels in differing groups undergoing the same transition will not experience the same waveform; (c) applying either a balanced pulse pair or a top-off pulse to a pixel undergoing a white-to-white transition and lying adjacent a pixel undergoing a visible transition; (d) driving extra pixels where the boundary between a driven and undriven area would otherwise fall along a straight line; and (e) driving a display with both DC balanced and DC imbalanced drive schemes, maintaining an impulse bank value for the DC imbalance and modifying transitions to reduce the impulse bank value.Type: ApplicationFiled: April 21, 2020Publication date: August 20, 2020Inventors: Karl Raymond AMUNDSON, Matthew J. APREA, Kenneth R. CROUNSE, Demetrious Mark HARRINGTON, Jason LIN, Theodore A. SJODIN, Chia-Chen SU
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Patent number: 10726798Abstract: A method of operating an electro-optic display in which an image is scrolled across the display, and in which a clearing bar is provided between two portions of the image being scrolled, the clearing bar scrolling across in display in synchronization with said two portions of the image, the writing of the clearing bar being effected such that every pixel over which the clearing bar passes is rewritten.Type: GrantFiled: March 2, 2017Date of Patent: July 28, 2020Assignee: E Ink CorporationInventors: Demetrious Mark Harrington, Theodore A. Sjodin, Robert W. Zehner, Timothy J. O'Malley, Benjamin Harris Paletsky
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Patent number: 10672350Abstract: A variety of methods for driving electro-optic displays so as to reduce visible artifacts are described. Such methods include (a) applying a first drive scheme to a non-zero minor proportion of the pixels of the display and a second drive scheme to the remaining pixels, the pixels using the first drive scheme being changed at each transition; (b) using two different drive schemes on different groups of pixels so that pixels in differing groups undergoing the same transition will not experience the same waveform; (c) applying either a balanced pulse pair or a top-off pulse to a pixel undergoing a white-to-white transition and lying adjacent a pixel undergoing a visible transition; (d) driving extra pixels where the boundary between a driven and undriven area would otherwise fall along a straight line; and (e) driving a display with both DC balanced and DC imbalanced drive schemes, maintaining an impulse bank value for the DC imbalance and modifying transitions to reduce the impulse bank value.Type: GrantFiled: January 31, 2013Date of Patent: June 2, 2020Assignee: E Ink CorporationInventors: Karl R. Amundson, Matthew J. Aprea, Kenneth R. Crounse, Demetrious Mark Harrington, Jason Lin, Theodore A. Sjodin, Chia-Chen Su
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Patent number: 9996195Abstract: A touch screen electro-optic display is arranged such that upon a touch being detected on the display surface, the display surface surrounding the touch “blinks” by being driven to a different optical state, then back to its original state. A second method uses a display having a pen or stylus which can draw lines upon the display. A first line segment is detected and its area updated using a first drive scheme having short waveforms. The area of a second line segment is updated using the first drive scheme. Thereafter, the areas of both line segments are updated using a second drive scheme different from the first drive scheme.Type: GrantFiled: October 28, 2016Date of Patent: June 12, 2018Assignee: E Ink CorporationInventors: Theodore A. Sjodin, Yuval Ben-Dov, Kenneth R. Crounse, Jason Lin, Karl Raymond Amundson, Michael Patrick Almon, Hugh M. Enxing, Timothy J. O'Malley
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Publication number: 20180102081Abstract: A driving method an electro-optic display having a plurality of display pixels, the method include applying a first set of waveform to a first display pixel, the first set of waveform having at least one active portion configured to affect the optical state of the first display pixel and at least one non-active portion configured not to substantially affect the optical state of the first display pixel. The method also include applying a second set of waveform to a second display pixel, the second set of waveform having at least one active portion configured to affect the optical state of the second display pixel and at least one non-active portion configured not to substantially affect the optical state of the second display pixel, where the at least one active portions of the first and second set of waveforms do not overlap in time.Type: ApplicationFiled: October 6, 2017Publication date: April 12, 2018Inventors: Yi LU, Theodore A. SJODIN, Chih-Hsiang HO, Karl Raymond AMUNDSON
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Publication number: 20170178574Abstract: A method of operating an electro-optic display in which an image is scrolled across the display, and in which a clearing bar is provided between two portions of the image being scrolled, the clearing bar scrolling across in display in synchronization with said two portions of the image, the writing of the clearing bar being effected such that every pixel over which the clearing bar passes is rewritten.Type: ApplicationFiled: March 2, 2017Publication date: June 22, 2017Inventors: Demetrious Mark HARRINGTON, Theodore A. SJODIN, Robert W. ZEHNER, Timothy J. O'MALLEY, Benjamin Harris Paletsky
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Patent number: 9672766Abstract: A bistable electro-optic display having a plurality of pixels each of which is capable of displaying at least three optical states, including two extreme optical states, is driven by the method comprising a first drive scheme capable of effecting transitions between all of the gray levels which can be displayed by the pixels; and a second drive scheme which contains only transitions ending at one of the extreme optical states of the pixels.Type: GrantFiled: April 14, 2009Date of Patent: June 6, 2017Assignee: E Ink CorporationInventor: Theodore A. Sjodin
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Patent number: 9620067Abstract: An electro-optic display uses first and second drive schemes differing from each other, for example a slow gray scale drive scheme and a fast monochrome drive scheme. The display is first driven to a pre-determined transition image using the first drive scheme, then driven to a second image, different from the transition image, using the second drive scheme. The display is thereafter driven to the same transition image using the second drive scheme; and from thence to a third image, different from both the transition image and the second image, using the first drive scheme.Type: GrantFiled: November 23, 2015Date of Patent: April 11, 2017Assignee: E Ink CorporationInventors: Demetrious Mark Harrington, Theodore A. Sjodin, Robert W. Zehner, Timothy J. O'Malley, Benjamin Harris Paletsky
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Publication number: 20170045965Abstract: A touch screen electro-optic display is arranged such that upon a touch being detected on the display surface, the display surface surrounding the touch “blinks” by being driven to a different optical state, then back to its original state. A second method uses a display having a pen or stylus which can draw lines upon the display. A first line segment is detected and its area updated using a first drive scheme having short waveforms. The area of a second line segment is updated using the first drive scheme. Thereafter, the areas of both line segments are updated using a second drive scheme different from the first drive scheme.Type: ApplicationFiled: October 28, 2016Publication date: February 16, 2017Inventors: Theodore A. SJODIN, Yuval BEN-DOV, Kenneth R. CROUNSE, Jason LIN, Karl Raymond AMUNDSON, Michael Patrick ALMON, Hugh M. ENXING, Timothy J. O'MALLEY
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Patent number: 9495918Abstract: A method is provided for driving electro-optic displays, especially bistable displays, to avoid edge effects when driving a limited area of the display. Pixels in an edge elimination region, at least one pixel wide and substantially surrounding the limited area, are driven from their original gray level to an intermediate gray level, and then back to their original gray level.Type: GrantFiled: February 28, 2014Date of Patent: November 15, 2016Assignee: E INK CORPORATIONInventors: Demetrious Mark Harrington, Kenneth R. Crounse, Karl Raymond Amundson, Matthew J. Aprea, Theodore A. Sjodin
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Publication number: 20160321981Abstract: Methods for driving electro-optic displays, especially bistable displays, include (a) using two-part waveforms, the first part of which is dependent only upon the initial state of the relevant pixel; (b) measuring the response of each individual pixel and storing for each pixel data indicating which of a set of standard drive schemes are to be used for that pixel; (c) for at least one transition in a drive scheme, applying multiple different waveforms to pixels on a random basis; and (d) when updating a limited area of the display, driving “extra” pixels in an edge elimination region to avoid edge effects.Type: ApplicationFiled: July 12, 2016Publication date: November 3, 2016Inventors: Demetrious Mark Harrington, Kenneth R. Crounse, Karl Raymond Amundson, Matthew J. Aprea, Theodore A. Sjodin, Alain Bouchard, Stephen J. Telfer, Ana L. Lattes, Yuval Ben-Dov
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Publication number: 20160078820Abstract: An electro-optic display uses first and second drive schemes differing from each other, for example a slow gray scale drive scheme and a fast monochrome drive scheme. The display is first driven to a pre-determined transition image using the first drive scheme, then driven to a second image, different from the transition image, using the second drive scheme. The display is thereafter driven to the same transition image using the second drive scheme; and from thence to a third image, different from both the transition image and the second image, using the first drive scheme.Type: ApplicationFiled: November 23, 2015Publication date: March 17, 2016Applicant: E Ink CorporationInventors: Demetrious Mark Harrington, Theodore A. Sjodin, Robert W. Zehner, Timothy J. O'Malley, Benjamin Harris Paletsky
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Patent number: 9230492Abstract: An electro-optic display uses first and second drive schemes differing from each other, for example a slow gray scale drive scheme and a fast monochrome drive scheme. The display is first driven to a pre-determined transition image using the first drive scheme, then driven to a second image, different from the transition image, using the second drive scheme. The display is thereafter driven to the same transition image using the second drive scheme; and from then to a third image, different from both the transition image and the second image, using the first drive scheme.Type: GrantFiled: April 11, 2011Date of Patent: January 5, 2016Assignee: E Ink CorporationInventors: Demetrious Mark Harrington, Theodore A. Sjodin, Robert W. Zehner, Timothy J. O'Malley, Benjamin Harris Paletsky
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Publication number: 20140292830Abstract: Methods for driving electro-optic displays, especially bistable displays, include (a) using two-part waveforms, the first part of which is dependent only upon the initial state of the relevant pixel; (b) measuring the response of each individual pixel and storing for each pixel data indicating which of a set of standard drive schemes are to be used for that pixel; (c) for at least one transition in a drive scheme, applying multiple different waveforms to pixels on a random basis; and (d) when updating a limited area of the display, driving “extra” pixels in an edge elimination region to avoid edge effects.Type: ApplicationFiled: February 28, 2014Publication date: October 2, 2014Inventors: Demetrious Mark Harrington, Kenneth R. Crounse, Karl Raymond Amundson, Matthew J. Aprea, Theodore A. Sjodin, Alain Bouchard, Stephen J. Telfer, Ana L. Lattes, Yuval Ben-Dov
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Publication number: 20140085350Abstract: Waveforms for driving electro-optic displays, especially bistable electro-optic displays, are modified by one or more of insertion of at least one balanced pulse pair into a base waveform; excision of at least one balanced pulse pair from the base waveform; and insertion of at least one period of zero voltage into the base waveform. Such modifications permit fine control of gray levels.Type: ApplicationFiled: November 25, 2013Publication date: March 27, 2014Applicant: E INK CORPORATIONInventors: Karl Raymond Amundson, Robert W. Zehner, Theodore A. Sjodin