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公开(公告)号：US12248226B2
公开(公告)日：2025-03-11
申请号：US18097819
申请日：2023-01-17
Applicant: E INK CORPORATION
Inventor： Kosta Ladavac , Richard J. Paolini, Jr. , Stephen J. Telfer , Lee Yezek , Sunil Krishna Sainis , Peter Carsten Bailey Widger
IPC: G02F1/1685 , G02F1/167 , G02F1/1676
Abstract: A variable light transmission device has at least one layer of electrophoretic medium comprising charged particles. Application of a an electric field having a waveform formed by a superposition of a carrier and a modulator waveform enables the switching of the device from a closed state to an open state, wherein the open state has higher light transmission than the closed state. As a result, the device enables the selection of the desired optical state by the user.
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公开(公告)号：US11579510B2
公开(公告)日：2023-02-14
申请号：US16862910
申请日：2020-04-30
Applicant: E INK CORPORATION
Inventor： Kosta Ladavac , Richard J. Paolini, Jr. , Stephen J. Telfer , Lee Yezek , Sunil Krishna Sainis , Peter Carsten Bailey Widger
IPC: G02F1/1685 , G02F1/1676 , G02F1/167
Abstract: A variable light transmission device has at least one layer of electrophoretic medium comprising charged particles. Application of a an electric field having a waveform formed by a superposition of a carrier and a modulator waveform enables the switching of the device from a closed state to an open state, wherein the open state has higher light transmission than the closed state. As a result, the device enables the selection of the desired optical state by the user.
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公开(公告)号：US11854448B2
公开(公告)日：2023-12-26
申请号：US18146608
申请日：2022-12-27
Applicant: E INK CORPORATION
Inventor： Karl Raymond Amundson , Teck Ping Sim , Michael D. McCreary , Yi Lu , Kosta Ladavac
CPC classification number: G09G3/006 , G01R27/16 , G09G3/2007 , G09G3/344 , G09G2310/06 , G09G2320/0257
Abstract: 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.
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公开(公告)号：US11776496B2
公开(公告)日：2023-10-03
申请号：US17474375
申请日：2021-09-14
Applicant: E INK CORPORATION
Inventor： Stephen J. Telfer , Kosta Ladavac , Christopher L. Hoogeboom
Abstract: Improved methods for driving a four particle electrophoretic medium including a scattering particle and at least two subtractive particles. Such methods allow displays such as a color electrophoretic display including a backplane having an array of thin film transistors, wherein each thin film transistor includes a layer of metal oxide semiconductor. The metal oxide transistors allow faster, higher voltage switching, and thus allow direct color switching of a four-particle electrophoretic medium without a need for top plane switching. As a result, the color electrophoretic display can be updated faster and the colors are reproduced more reliably.
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公开(公告)号：US11468855B2
公开(公告)日：2022-10-11
申请号：US16858999
申请日：2020-04-27
Applicant: E INK CORPORATION
Inventor： Stephen J. Telfer , Stephen Bull , Jennifer M. Morrison , Luke M. Slominski , David Darrell Miller , Olga Vladimirova Barykina-Tassa , Christopher L. Hoogeboom , Ana L. Lattes , Lee Yezek , Brandon MacDonald , Kosta Ladavac , Craig A. Herb
IPC: G09G3/34 , G02F1/167 , C09B67/08 , G09G3/20 , G02F1/1685 , G02F1/1675
Abstract: An electrophoretic medium comprises a fluid, a first, light scattering particle (typically white) and second, third and fourth particles having three subtractive primary colors (typically magenta, cyan and yellow); at least two of these colored particles being non-light scattering. The first and second particles bear polymer coatings such that the electric field required to separate an aggregate formed by the third and the fourth particles is greater than that required to separate an aggregate formed from any other two types of particles. Methods for driving the medium to produce white, black, magenta, cyan, yellow, red, green and blue colors are also described.
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Patent Agency Ranking
公开(公告)号：US11195481B2
公开(公告)日：2021-12-07
申请号：US16585453
申请日：2019-09-27
Applicant: E INK CORPORATION
Inventor： Stephen J. Telfer , Stephen Bull , Alain Bouchard , Craig A. Herb , Kosta Ladavac , Ana L. Lattes , Jennifer M. Morrison , Richard J. Paolini, Jr. , Michael Thomas Regan , Luke M. Slominski , Lee Yezek , Kenneth R. Crounse , J. Ryan Kruse , Christopher L. Hoogeboom , Jason D. Feick , David Darrell Miller
IPC: G09G3/34 , G02F1/167 , G02F1/1685 , G02F1/1675
Abstract: An electrophoretic display comprising a fluid including a first species of particles and a charge control agent disposed between first and second electrodes. When a first addressing impulse have an electrical polarity is applied to the medium, the first species of particles move in one direction relative to the electric field, but when a second addressing impulse, larger than the first addressing impulse but having the same electrical polarity, is applied to the medium, the first species of particles move in the opposed direction relative to the electric field.
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公开(公告)号：US10796649B2
公开(公告)日：2020-10-06
申请号：US15959614
申请日：2018-04-23
Applicant: E INK CORPORATION
Inventor： Stephen J. Telfer , Richard J. Paolini, Jr. , Stephen Bull , Joshua A. Ritchey , Kosta Ladavac , Lee Yezek , Craig A. Herb , Peter Carsten Bailey Widger
IPC: G09G3/34 , G02F1/167 , G02F1/1685 , H01B3/10
Abstract: A variable transmission medium comprises a fluid and a plurality of nanoparticles dispersed in the fluid, wherein addition of acid to the fluid causes the nanoparticles to flocculate and form aggregates of particles that scatter light. The nanoparticles may comprise at least one metal oxide, such as titanium dioxide, zinc oxide or zirconium dioxide. The fluid may have a dielectric constant less than about 10. The medium may be used in, for example, privacy glass for a conference room.
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公开(公告)号：US09921451B2
公开(公告)日：2018-03-20
申请号：US14849658
申请日：2015-09-10
Applicant: E INK CORPORATION
Inventor： Stephen J. Telfer , Stephen Bull , Jennifer M. Morrison , Luke M. Slominski , David Darrell Miller , Olga Vladimirovna Barykina-Tassa , Lee Yezek , Brandon MaCDonald , Kosta Ladavac , Craig A. Herb
CPC classification number: G02F1/167 , C09B67/0013 , G02F2001/1678 , G09G3/2003 , G09G3/344 , G09G2300/0452 , G09G2310/068
Abstract: An electrophoretic medium comprises a fluid, a first, light scattering particle (typically white) and second, third and fourth particles having three subtractive primary colors (typically magenta, cyan and yellow); at least two of these colored particles being non-light scattering. The first and second particles bear polymer coatings such that the electric field required to separate an aggregate formed by the third and the fourth particles is greater than that required to separate an aggregate formed from any other two types of particles. Methods for driving the medium to produce white, black, magenta, cyan, yellow, red, green and blue colors are also described.
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公开(公告)号：US09697778B2
公开(公告)日：2017-07-04
申请号：US14277107
申请日：2014-05-14
Applicant: E INK CORPORATION
Inventor： Stephen J. Telfer , Stephen Bull , Alain Bouchard , Craig A. Herb , Kosta Ladavac , Ana L. Lattes , Jennifer M. Morrison , Richard J. Paolini, Jr. , Michael Thomas Regan , Luke M. Slominski , Lee Yezek , Kenneth R. Crounse , J. Ryan Kruse , Christopher L. Hoogeboom , Jason D. Feick , David Darrell Miller
CPC classification number: G09G3/344 , G02F1/167 , G02F2001/1678 , G09G2310/06 , G09G2310/068
Abstract: An electrophoretic medium comprises a fluid and at least one species of particles disposed, When a first addressing impulse is applied to the medium, the first species of particles move in one direction relative to the electric field, but when a second addressing impulse, larger than the first addressing impulse, is applied to the medium, the first species of particles move in the opposed direction relative to the electric field.
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10.发明授权公开(公告)号：US11837184B2
公开(公告)日：2023-12-05
申请号：US18100792
申请日：2023-01-24
Applicant: E INK CORPORATION
Inventor： Stephen J. Telfer , Kosta Ladavac , Christopher L. Hoogeboom
Abstract: Improved methods for driving a four particle electrophoretic medium including a scattering particle and at least two subtractive particles. Such methods allow displays such as a color electrophoretic display including a backplane having an array of thin film transistors, wherein each thin film transistor includes a layer of metal oxide semiconductor. The metal oxide transistors allow faster, higher voltage switching, and thus allow direct color switching of a four-particle electrophoretic medium without a need for top plane switching. As a result, the color electrophoretic display can be updated faster and the colors are reproduced more reliably.
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