Particle Suspensions (e.g., Electrophoretic) Patents (Class 345/107)
  • Patent number: 11462183
    Abstract: 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: Grant
    Filed: July 30, 2021
    Date of Patent: October 4, 2022
    Assignee: E Ink Corporation
    Inventors: Karl Raymond Amundson, Matthew J. Aprea, Kenneth R. Crounse, Demetrious Mark Harrington, Jason Lin, Theodore A. Sjodin, Chia-Chen Su
  • Patent number: 11462182
    Abstract: Methods for driving an electrophoretic medium including two pairs of oppositely charged particles. The first pair including a first type of positive particles and a first type of negative particles and the second pair consists of a second type of positive particles and a second type of negative particles, wherein the first pair of particles and the second pair of particles have different charge magnitudes (identifiable as zeta potentials). In particular, the driving methods produce cleaner optical stakes of the lesser-charged particles with less contamination from the other particles and more consistent electro-optical performance when the intermediate driving voltages are modified.
    Type: Grant
    Filed: June 3, 2021
    Date of Patent: October 4, 2022
    Assignee: E Ink California, LLC
    Inventors: Craig Lin, Feng-Shou Lin
  • Patent number: 11454855
    Abstract: An electrokinetic device is configured as a dynamic lens cover and/or filter for an imaging assembly, e.g., of a mobile device, to selectively allow electromagnetic radiation to pass through a lens of the imaging assembly when the dynamic lens cover is in a first operating state or to prevent electromagnetic radiation from reaching the lens of the imaging assembly when the dynamic lens cover is in a second operating state. The electrokinetic device includes transparent first and second substrates, and a compaction trench surrounding the lens of the imaging assembly. The compaction trench stores pigment when the dynamic lens cover is in the first operating state. In the second operating state pigment is dispersed within a carrier fluid between the first and second substrates.
    Type: Grant
    Filed: January 13, 2020
    Date of Patent: September 27, 2022
    Inventors: James E. Abbott, Jr., Timothy Koch, Cassady Roop, Palitha Wickramanayake
  • Patent number: 11440468
    Abstract: Systems, apparatus and methods related to electronic vehicle registration and tag displays, specifically a vehicle license plate frame containing multiple low power e-paper type displays configured to replace the stickers used for vehicle registration and parking authorizations as well as provide indication of purchased parking increments and/or allow for display of advertisement or other messages. The system may also allow the display of driver or vehicle specific information such as the user's driver's license number or insurance at the request of a third party authorities such as the police. The system allows for use of a mobile computing device having software connected with the internet to access a server allowing for communication with various registrations authorities including the DMV, municipal parking authorities, and private parking authorities. Displays may be overwritten and changed depending on the location of the vehicle and need to provide display of certain authorizations.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: September 13, 2022
    Inventor: Gary Golduber
  • Patent number: 11407239
    Abstract: After printing cue marks and front surface images on the front surface of web paper by a printing station, an image data elongation-contraction processor creates corrected back surface image data based on elasticity information, and a printing station prints back surface images based on the corrected back surface image data, on the back surface of the printing medium. At this time, a page interval calculator calculates a page interval from an interval between the cue marks detected by a detector, and a difference computing unit calculates differences between the page interval and image size in a transport direction of the corrected back surface image data. Since these differences indicate shifts of the correction based on the elasticity information, optimal elasticity information can be set by revising the elasticity information with these differences through a setting unit. Consequently, the operator of the apparatus can easily set optimal elasticity information based on the differences.
    Type: Grant
    Filed: September 9, 2019
    Date of Patent: August 9, 2022
    Assignee: SCREEN HOLDINGS CO., LTD.
    Inventor: Susumu Takahashi
  • Patent number: 11398196
    Abstract: A driving method is provided for an electric-optic display having a plurality of display pixels, the method including dividing the plurality of display pixels into multiple groups of pixels, applying at least one waveform structure to the multiple groups of pixels, the at least one waveform structure having a driving section for updating the multiple groups of pixels, and updating the multiple groups of pixels in a contiguous fashion such that only one group of display pixels completes the driving section at any given time.
    Type: Grant
    Filed: November 9, 2020
    Date of Patent: July 26, 2022
    Assignee: E Ink Corporation
    Inventors: Pierre-Yves Emelie, Ana L. Lattes, Kenneth R. Crounse, Chih-Hsiang Ho
  • Patent number: 11385516
    Abstract: Methods and devices are provided for the beam steering, focusing, display, and generation of light and images by electronically induced refractive index gradients and scattering fields formed by forces on particles in a colloid due to phoretic processes. The methods and devices provide control over multi-octave bandwidth and polarization diverse light having a large dynamic range in power handling. Embodiments of the technique are provided for large-angle beam steering, beam combining, focusing, and redirecting light electronically. Diverse applications for the technology include, but are not limited to: solar concentrators, LiDAR, robotic vision, smartphone zoom lenses, 3D-manufacturing, high-power laser machining, augmented & virtual reality displays, electronic paper displays, computer and television displays.
    Type: Grant
    Filed: August 2, 2019
    Date of Patent: July 12, 2022
    Assignee: GIANT LEAP HOLDINGS, LLC
    Inventor: Leo D. Didomenico
  • Patent number: 11386816
    Abstract: A flexible display device and an application method thereof are provided. The flexible display device includes a main body, a flexible display screen and a power device, the flexible display screen is configured to have a first end coupled to the main body, and a second end of the flexible display screen opposite to the first end is movable relative to the main body.
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: July 12, 2022
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Hong Li, Dawei Wang, Shanchen Kao, Yanli Wang, Haoran Wang
  • Patent number: 11378824
    Abstract: An electro-optic medium is disclosed including a continuous phase comprising a binder and a discontinuous phase comprising electro-optic material. The binder may include one or more elastomers having a Young's modulus less than 25 MPa. The electro-optic material may include capsules that encapsulate various kinds of materials capable of switching optical states, such as a plurality of charged particles dispersed in a suspending fluid and capable of moving upon application of an electric field to the suspending fluid. The electro-optic medium may be incorporated into a laminated flexible electro-optic display having an outer light-transmissive protective layer and conductive material on either side of the electro-optic medium. The conductive material on at least one side of the electro-optic medium may also be light-transmissive. The opposing side of the display relative to the outer protective layer may also include a substrate.
    Type: Grant
    Filed: July 29, 2019
    Date of Patent: July 5, 2022
    Assignee: E Ink Corporation
    Inventor: Darwin Scott Bull
  • Patent number: 11360298
    Abstract: Exemplary reflective display devices and components are described. The devices and components may include a microwell layer having a plurality of quantum dot wells. Each quantum dot well of the plurality of quantum dot wells includes a reflective layer lining an interior wall of the well, and a plurality of nanoparticles configured to emit a color of light. The reflective display components may also include an electrowetting layer positioned above the microwell layer. The electrowetting layer may be operable to independently adjust an intensity of light emitted from each quantum dot well of the plurality of quantum dot wells in the microwell layer. The reflective display components may further include at least one of a light guide layer positioned above or below the electrowetting layer and one or more color filters positioned above at least one of the quantum dot wells.
    Type: Grant
    Filed: January 18, 2022
    Date of Patent: June 14, 2022
    Assignee: Applied Materials, Inc.
    Inventors: Robert Anthony Nordsell, Arvinder M. Chadha
  • Patent number: 11353693
    Abstract: Described herein is a polymorphic display, which is a unitary apparatus constructed such that a wide variety of electro-optic functions are enabled. The polymorphic display, even when having multiple pixels, enables sharing of selected structures among the pixels. In a multi-pixel construction, there is a set of pixels in the display that exhibit one set of operable properties, such as particular stability, sequencing, and switching properties, and another set of pixels that are different from the first set. That is, they have different stability, sequencing, or switching properties. In such a way, a highly flexible polymorphic display may be construed to satisfy a wide range of display need.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: June 7, 2022
    Inventors: Paul Atkinson, John Rilum, Ben Reeves
  • Patent number: 11335267
    Abstract: An organic light emitting display device may include a display panel, a power supply, and a display driver. The display panel may comprise a plurality of scan lines, a plurality of data lines, and a plurality of pixels connected to the scan lines and to the data lines. The power supply may supply a first pixel voltage and a second pixel voltage to the pixels. The display driver may control the display panel. The display panel may display a first image in a first frame frequency during a first driving mode, and display a second image in a second frame frequency that is lower than the first frame frequency during a second driving mode, according to a control by the display driver.
    Type: Grant
    Filed: June 17, 2020
    Date of Patent: May 17, 2022
    Inventor: Jin Jeon
  • Patent number: 11320714
    Abstract: The present application discloses an image formation apparatus that can transfer an image into electronic paper using an electronic photography method, and a printing control method for the image formation apparatus. The present electronic paper comprises an electrophoresis layer for displaying an image using an electrophoresis method, a conductive layer, and a film layer for transmitting an image; and the image formation apparatus comprises a communication interface for receiving printing data, an image formation unit for transferring an image corresponding to the printing data, and a processor for controlling the image formation unit.
    Type: Grant
    Filed: December 29, 2016
    Date of Patent: May 3, 2022
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Heung-sup Park, Eog-kyu Kim, Yun-tae Kim, Young-su Lee
  • Patent number: 11315504
    Abstract: The present invention is directed to driving methods for driving an electro-optic display device which can display high quality color states. The electro-optic display may have a plurality of display pixels, a first type of pigment particle, a second type of pigment particle, and a third type of pigment particle, wherein the three types of pigment particles have optical characteristics differing from one another, the method may include: (i) driving a display pixel to the color state of the first type of pigment particles or the color state of the second type of pigment particles; (ii) driving the pixel to a grey state between the color state of the first type of pigment particle and the color state of the second type of pigment particles; and (iii) applying at least one pair of opposite driving pulses.
    Type: Grant
    Filed: September 22, 2020
    Date of Patent: April 26, 2022
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Craig Lin, Ming Wang
  • Patent number: 11315505
    Abstract: The invention relates to electrophoretic layers containing at least five different particles, and to driving methods for displaying at least five, and in some embodiments, six different colors at each pixel or sub-pixel. The electrophoretic layers may also contain uncharged neutral buoyancy particles, and the driving methods may include special shaking waveform sequences.
    Type: Grant
    Filed: December 9, 2020
    Date of Patent: April 26, 2022
    Assignee: E INK CALIFORNIA, LLC
    Inventor: Craig Lin
  • Patent number: 11294255
    Abstract: A front plane laminate useful in the manufacture of electro-optic displays comprises, in order, a light-transmissive electrically-conductive layer, a layer of an electro-optic medium in electrical contact with the electrically-conductive layer, an adhesive layer and a release sheet. This front plane laminate can be prepared as a continuous web, cut to size, the release sheet removed and the laminate laminated to a backplane to form a display. Methods for providing conductive vias through the electro-optic medium and for testing the front plane laminate are also described.
    Type: Grant
    Filed: July 22, 2019
    Date of Patent: April 5, 2022
    Assignee: E Ink Corporation
    Inventors: Gregg M. Duthaler, John E. Ritter, Michael L. Steiner
  • Patent number: 11269233
    Abstract: An anti-peeping device, an anti-peeping method thereof and a display device are disclosed. The anti-peeping device comprises: an upper substrate and a lower substrate which are arranged opposite to each other, and an electrophoresis layer filled between the upper substrate and the lower substrate; an electrode layer is arranged on a side, facing the electrophoresis layer, of at least one of the upper substrate and the lower substrate; the electrode layer includes a plurality of first sub-electrodes distributed along a first direction; and the electrophoresis layer includes charged particles with an electric property opposite to that of the first sub-electrodes to absorb light rays.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: March 8, 2022
    Assignees: BOE Technology Group Co., Ltd., Beijing BOE Display Technology Co., Ltd.
    Inventors: Yang You, Ruizhi Yang, Zhaokun Yang, Ruiyong Wang, Zhenhua Lv, Xiang Feng, Yun Qiu
  • Patent number: 11257445
    Abstract: Methods for driving an electro-optic display having a plurality of display pixels and each of the plurality of display pixels is associated with a display transistor, the method includes applying a first voltage to a transistor associated with a display pixel for a first duration of time to drain remnant voltages from the display pixel, applying a second voltage to the transistor for a second duration of time to stop the draining of remnant voltages from the display pixel, and applying a third voltage to the transistor for a third duration of time to drain remnant voltages from the display pixel.
    Type: Grant
    Filed: November 17, 2020
    Date of Patent: February 22, 2022
    Assignee: E Ink Corporation
    Inventors: Karl Raymond Amundson, Teck Ping Sim
  • Patent number: 11259426
    Abstract: A rollable display device includes: a soft display panel; a main roller for winding or unwinding the soft display panel; an actuator coupled to the soft display panel to ascend and descend the soft display panel; a housing having the main roller mounted therein, wherein an opening extending in a first direction is defined in a top of the housing to retract and extend the soft display panel therethrough; and an elastic portion having one end coupled to a perimeter of the opening and protruding to cover at least a portion of the opening, wherein the elastic portion includes a rubber portion having a predetermined length along the first direction. The rollable display device may minimize exposure of an interior of the housing to prevent foreign substances from entering.
    Type: Grant
    Filed: May 28, 2020
    Date of Patent: February 22, 2022
    Assignee: LG ELECTRONICS INC.
    Inventors: Dongkyoon Han, Kyungmin Jeong, Taesung Cha, Heegun Park, Hyeongjun Kwon
  • Patent number: 11250795
    Abstract: A method of driving an electronic paper display apparatus includes: providing a preprocessing signal in the first pulse signal to the first electrode in the display stage of the first image display stage, so that the first particles and the third particles are mixed, and the first particles and the third particles are closer to a display side of the display apparatus than the second particles; and providing a first sub-pulse signal in the first pulse signal to the first electrode in the display stage of the first image display stage after providing the preprocessing signal, so that the third particles are closer to the display side of the display apparatus than the first particles and the second particles and the microcup displays the third color.
    Type: Grant
    Filed: June 25, 2020
    Date of Patent: February 15, 2022
    Assignees: BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Yinan Gao, Qingqing Ma, Shuo Li, Chao Tian, Guojie Qin, Xiang Yuan, Junpeng Han, Tianjiao Wang, Yin Yuan, Lizhong Zhang
  • Patent number: 11237450
    Abstract: The present disclosure relates to a display panel. The display panel includes a light switching layer, and a color film layer located on the light switching layer, wherein the color film layer includes a diffraction grating. The color film layer further includes a collimating layer located on a side of the diffraction grating facing away from the light switching layer. The color film layer further includes a light splitting layer located between the diffraction grating and the light switching layer.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: February 1, 2022
    Assignees: BEIJING BOE DISPLAY TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Lianjie Qu, Kang Guo, Yonglian Qi, Hebin Zhao
  • Patent number: 11238494
    Abstract: A method of managing use of a digital billboard. The method comprises determining, by an analysis application executing on a computer system, a plurality of mobile viewsheds for each of a plurality of mobile communication devices, where a mobile viewshed comprises a location, a speed, a direction of travel of the mobile communication device, accessing demographic and profile information of a subscriber associated with the device, determining an arcscore for each of the mobile viewsheds that intersect a static viewshed of the digital billboard based in part on the speed of the mobile viewshed and the angular alignment of the direction of travel of the mobile viewshed with an orientation of the static viewshed of the digital billboard, and rotating content presentation on the digital billboard at a rate determined in part based on the arcscores and based on the average traffic speed.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: February 1, 2022
    Assignee: Sprint Communications Company L.P.
    Inventors: Robert H. Burcham, Matthew Habiger
  • Patent number: 11222876
    Abstract: There is provided a display device including a plurality of unit regions disposed adjacent to each other, a first region that is provided in each of the unit regions, and emits first light, and a second region that is provided outside the first region in each of the unit regions, and emits second light. The second light is different from the first light in at least one of luminance, wavelength, or surface-reflection component, the second regions are provided between adjacent ones of the first regions, and a difference in luminance, wavelength, or surface-reflection component between the second light to be emitted from adjacent ones of the unit regions is smaller than a difference in luminance, wavelength, or surface-reflection component between the first light and the second light in a same one of the unit regions.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: January 11, 2022
    Assignees: SONY CORPORATION, SONY SEMICONDUCTOR SOLUTIONS CORPORATION
    Inventors: Akira Ohmae, Yusuke Kataoka, Tatsuo Ohashi, Norifumi Kikuchi, Katsuhiro Tomoda, Goshi Biwa, Ippei Nishinaka
  • Patent number: 11211031
    Abstract: A driving method of a display device includes supplying a pixel with a first light emission stop pulse having a first pulse width during a first frame that is driven at a first frequency; supplying the pixel with a second light emission stop pulse having a second pulse width during a second frame that is driven at a second frequency; and supplying the pixel with a third light emission stop pulse having a third pulse width during a third frame that is driven at the second frequency. The first frequency is different from the second frequency. The second pulse width is between the first pulse width and the third pulse width.
    Type: Grant
    Filed: April 9, 2020
    Date of Patent: December 28, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventor: Ju Bong An
  • Patent number: 11195481
    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.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: December 7, 2021
    Assignee: E Ink Corporation
    Inventors: 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
  • Patent number: 11189205
    Abstract: The present disclosure relates to a portable attachment and communication system that enable a desired image to be displayed with flexibility and lower power consumption in an article worn or carried by a human. The portable attachment is an article including a display body made of an electrophoretic display, the article being carried or worn by a user. The present disclosure can be applied to, for example, a portable attachment, etc. Examples of the portable attachment carried by a user are a bag, a wallet, a key holder, etc. Examples of the portable attachment worn by the user are a hair accessory, a tie, a watch, clothing, etc.
    Type: Grant
    Filed: June 5, 2019
    Date of Patent: November 30, 2021
    Inventors: Masaaki Yamamoto, Yoichi Ito, Yuki Sugiue, Machiko Takematsu, Masakazu Mitsugi, Hiroshi Saeki
  • Patent number: 11158223
    Abstract: Method for producing an electrophoretic display device comprising a low-voltage microcontroller. The invention relates to a method for producing a segmented electrophoretic display device comprising a bistable display operating at predetermined opposing voltages and an electronic circuit with microcontroller for controlling the display according to a control program. The method includes the following steps: supplying the controller, which is different from a specific display controller for a bistable display and configured to deliver voltages, lower in absolute value to the predetermined voltages, and compensating the voltages with at least one compensation voltage to at least reach the predetermined opposing voltages. The invention also relates to the corresponding device.
    Type: Grant
    Filed: October 20, 2017
    Date of Patent: October 26, 2021
    Assignee: THALES DIS FRANCE SA
    Inventor: Stéphane Touvet
  • Patent number: 11145235
    Abstract: An electro-optic display having a plurality of pixels is driven from a first image to a second image using a first drive scheme, and then from the second image to a third image using a second drive scheme different from the first drive scheme and having at least one impulse differential gray level having an impulse potential different from the corresponding gray level in the first drive scheme. Each pixel which is in an impulse differential gray level in the second image is driven from the second image to the third image using a modified version of the second drive scheme which reduces its impulse differential The subsequent transition from the third image to a fourth image is also conducted using the modified second drive scheme but after a limited number of transitions using the modified second drive scheme, all subsequent transitions are conducted using the unmodified second drive scheme.
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: October 12, 2021
    Assignee: E Ink Corporation
    Inventors: Demetrious Mark Harrington, Kenneth R. Crounse, Karl Raymond Amundson, Teck Ping Sim, Matthew J. Aprea
  • Patent number: 11145261
    Abstract: 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: Grant
    Filed: April 21, 2020
    Date of Patent: October 12, 2021
    Assignee: E Ink Corporation
    Inventors: Karl Raymond Amundson, Matthew J. Aprea, Kenneth R. Crounse, Demetrious Mark Harrington, Jason Lin, Theodore A. Sjodin, Chia-Chen Su
  • Patent number: 11143930
    Abstract: A method of driving a variable transmission film is provided and a variable transmission device including the film and a controller configured to drive the film. The film may include a layer of electrophoretic material and at least one electrode, the electrophoretic material including a fluid containing a plurality of charged particles capable of moving through the fluid upon application of an electric field by the at least one electrode. The method may include applying a first voltage waveform to the film at an initial optical state and applying a second voltage waveform having a lower frequency and shorter pulse duration than the first voltage waveform to switch the film to a final optical state, wherein the film has a higher percent transmission at the initial optical state than the final optical state.
    Type: Grant
    Filed: June 20, 2019
    Date of Patent: October 12, 2021
    Assignee: E Ink Corporation
    Inventors: Peter Carsten Bailey Widger, George G. Harris, Richard J. Paolini, Jr., Craig Alan Breen
  • Patent number: 11126033
    Abstract: A display device is disclosed that includes a backlight comprising light-emitting diodes. The disclosed display device includes a liquid crystal panel configured to control transmission of light from the backlight to a viewer. The display device also includes one or more optical films that incorporate one or more light conversion or light absorbing materials. The optical films can be positioned between the layers of the disclosed display device and give enhanced blue-light absorption to the display device.
    Type: Grant
    Filed: February 17, 2021
    Date of Patent: September 21, 2021
    Assignee: Eyesafe Inc.
    Inventors: Arkady Garbar, Derek Harris
  • Patent number: 11086186
    Abstract: Variable transmission covering systems that can be used, for example, to control the amount of light passing through a window in a building. Using transmissive electrophoretic media that can switch between a first and second optical state, the invention can be used to change the color and/or transmissivity of a structure (or structures) that is placed in front of an object. In some embodiments, the variable transmission system can change transmission and color on command.
    Type: Grant
    Filed: May 7, 2019
    Date of Patent: August 10, 2021
    Assignee: E Ink Corporation
    Inventors: Ana L. Lattes, Stephen J. Telfer
  • Patent number: 11077675
    Abstract: An imager includes an ion-emitting unit and a conveying structure to move a passive e-paper display medium in a first orientation along a travel path and to releasably support the display medium in spaced relation to receive airborne ions from the ion-emitting unit for imaging operations.
    Type: Grant
    Filed: October 9, 2019
    Date of Patent: August 3, 2021
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Napoleon J. Leoni, Omer Gila, Henryk Birecki
  • Patent number: 11074874
    Abstract: An electro-phoretic display apparatus including an electro-phoretic display panel and a driving circuit is provided. The electro-phoretic display panel includes a display area and a border area. The driving circuit is configured to drive the display area to display an image frame according to a first voltage. The driving circuit drives the border area to maintain displaying a border of a first color or a second color according to a second voltage. The driving circuit generates the second voltage according to the first voltage. The border area includes electro-phoretic particles of the first color or the second color. A voltage difference between the first voltage and the second voltage drives the electro-phoretic particles of the first color or the second color to be maintained to a predetermined position such that the border area maintains displaying the border of the first color or the second color.
    Type: Grant
    Filed: May 18, 2020
    Date of Patent: July 27, 2021
    Assignee: E Ink Holdings Inc.
    Inventors: Hao-Ting Hsu, Chia-Hao Kuo, Yu-Jui Chang
  • Patent number: 11049463
    Abstract: The present invention is directed to driving waveforms and a driving method for an electrophoretic display. The method and waveforms have the advantage that the changes in the driving voltages due to the shift are minimized. In addition, the overall driving time for the waveforms is also shortened due to the shortened driving frames. There are no additional data points required as the number of the driving frames remains the same. Therefore, the power consumption is nearly identical with the waveform having driving frames of a fixed frame time.
    Type: Grant
    Filed: January 11, 2011
    Date of Patent: June 29, 2021
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Craig Lin, Bryan Chan
  • Patent number: 11030965
    Abstract: A method for driving an electro-optic display having a front electrode, a backplane, and a display medium including at least three differently-colored particles, wherein the medium is positioned between the front electrode and the backplane. The method includes applying a reset phase and a color transition phase to the display such that the sum of all impulses results in an offset that maintains a DC-balance across the display medium. The invention additionally includes controllers for executing the method.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: June 8, 2021
    Assignee: E Ink Corporation
    Inventors: Stephen J. Telfer, Christopher L. Hoogeboom, Kenneth R. Crounse
  • Patent number: 11030936
    Abstract: Techniques for operating an electro-optic display to reduce the appearance of light edge artifacts in displayed images are described. A method for operating the electro-optic display includes detecting a null state transition of a first pixel when transitioning from a first image to a second image. The method further includes determining whether a threshold number of cardinal neighbors of the first pixel transition from a black state to a white state when transitioning from the first image to the second image. In response to a subsequent transition to a third image, the method further includes applying a voltage signal to the first pixel, wherein the voltage signal has a waveform configured to generate an optical black state for the first pixel.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: June 8, 2021
    Assignee: E Ink Corporation
    Inventors: Pierre-Yves Emelie, Kenneth R. Crounse
  • Patent number: 11011595
    Abstract: A display panel includes a substrate having a non-display area surrounding an opening area, and a display area outside the non-display area, a plurality of display elements arranged in the display area, a plurality of first lines extending in a first direction and bypassing the opening area along an edge of the opening area, a plurality of second lines extending in a second direction that crosses the first direction and, the plurality of second lines bypassing the opening area along the edge of the opening area, and a plurality of third lines extending in the second direction and bypassing the opening area along the edge of the opening area, at least one of the plurality of third lines including a circuitous portion between neighboring first lines of the plurality of first lines in the non-display area.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: May 18, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Wonse Lee, Jintae Jeong, Jihyun Ka, Hwayoung Song
  • Patent number: 11004409
    Abstract: The present invention is directed to driving methods for a color display device which can display high quality color states. The display device utilizes an electrophoretic fluid which comprises three types of pigment particles having different optical characteristics.
    Type: Grant
    Filed: May 17, 2019
    Date of Patent: May 11, 2021
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Craig Lin, Jo-Cheng Huang, Heng-Che Chen, Peter B. Laxton, Ming Wang, Ping-Yueh Cheng, HongMei Zang
  • Patent number: 11003214
    Abstract: Various configurations of an electronic display, and devices incorporating the display, are provided. The display may have multiple portions connected along one or more axes, lines, points, or other connecting areas. The portions are movable about the connections. In various configurations, the display portions emulate different media and/or communication and computing devices. Two or more of the display devices may be coupled in an array.
    Type: Grant
    Filed: September 17, 2019
    Date of Patent: May 11, 2021
    Assignee: CFPH, LLC
    Inventor: Gregory P. Manning
  • Patent number: 10997930
    Abstract: A display device is operated by using several iterations of a scan phase followed by a global drive phase. In the scan phase, the state of each pixel in the display device is set to either “enabled” or “disabled”, during which time a global drive generator is inactive. Then, in the global drive phase, a global drive signal is sent to the display device. Only the subset of enabled pixels is affected by the global drive signal, which causes the enabled pixels to perform a transition to a desired display state. The sequence of the scan phase followed by the global drive phase is then repeated up to the number of unique transitions required to update the display device.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: May 4, 2021
    Assignee: E Ink Corporation
    Inventor: Kenneth R. Crounse
  • Patent number: 10991909
    Abstract: An organic light emitting display device includes: a thin film transistor disposed in a display area of a substrate; an insulating layer disposed on the thin film transistor; an organic light emitting element disposed on the insulating layer and connected to the thin film transistor; and an encapsulation layer covering the organic light emitting element. The encapsulation layer includes: a first inorganic layer extending from the organic light emitting element to a non-display area; an organic layer disposed on the first inorganic layer; a second inorganic layer extending from the organic layer to the non-display area; and an organic pattern layer disposed between the first inorganic layer and the second inorganic layer and spaced apart from the organic layer in the non-display area. At least a part of the first inorganic layer and at least a part of the second inorganic layer may contact each other in the non-display area.
    Type: Grant
    Filed: January 14, 2019
    Date of Patent: April 27, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Seol Kim, Eunah Kim, Sungchan Jo
  • Patent number: 10978517
    Abstract: A display substrate includes a base substrate and a filter conversion layer disposed on the base substrate. The filter conversion layer includes a light conversion material capable of absorbing light with a wavelength less than a preset wavelength range, and converting the absorbed light into light with a wavelength in the preset wavelength range. The filter conversion layer is configured to allow the light with the wavelength in the preset wavelength range to pass through.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: April 13, 2021
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Qingchao Zhou, Qing Wang, Shengji Yang, Xiaochuan Chen
  • Patent number: 10955697
    Abstract: A display device is disclosed that includes a backlight comprising light-emitting diodes. The disclosed display device includes a liquid crystal panel configured to control transmission of light from the backlight to a viewer. The display device also includes one or more optical films that incorporate one or more light conversion materials.
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: March 23, 2021
    Assignee: Eyesafe Inc.
    Inventors: Arkady Garbar, Bonnie G. Simmons, Robert Visser
  • Patent number: 10908472
    Abstract: An electrophoretic display apparatus including a driving array substrate, a color filter layer, and an electrophoretic display film is provided. The driving array substrate has a plurality of display units. The color filter layer is disposed on the driving array substrate. The color filter layer includes a plurality of color filter patterns. Each of the display units corresponds to the color filter patterns of two different colors. The electrophoretic display film is between the driving array substrate and the color filter layer. The electrophoretic display film includes a plurality of display mediums. Each of the display mediums includes an electrophoretic liquid, a plurality of color charged particles, a plurality of black charged particles, and a plurality of white charged particles. A color of the color charged particles is different from colors of the color filter patterns.
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: February 2, 2021
    Assignee: E Ink Holdings Inc.
    Inventors: Po-Yuan Lo, Lee-Tyng Chen
  • Patent number: 10901287
    Abstract: The present invention provides driving methods for electrophoretic color display devices. The backplane system used for the driving methods is found to be simpler which renders color display devices more cost effective. More specifically, the driving method comprises first driving all pixels towards a color state by modulating only the common electrode, followed by driving all pixels towards their desired color states by maintaining the common electrode grounded and applying different voltages to the pixel electrodes.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: January 26, 2021
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Craig Lin, Chi-Mao Hung
  • Patent number: 10901288
    Abstract: A display device including a pair of substrates having surfaces facing each other and electrodes formed on the surfaces, respectively, a display medium having a memory effect and formed between the pair of substrates, and a drive unit that applies a drive voltage to the display medium. The display medium includes charged particles encapsulated therein such that movement of the charged particles based on a voltage applied by the drive unit provides display, and the charged particles include first particles for displaying a first color with application of a first voltage, second particles for displaying a second color with application of a second voltage having a polarity different from a polarity of the first voltage, and third particles for displaying a third color with application of a third voltage which has the same polarity as the polarity of the first voltage and an absolute value smaller than an absolute value of the first voltage.
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: January 26, 2021
    Assignee: TOPPAN PRINTING CO., LTD.
    Inventors: Takehisa Takada, Mamoru Ishizaki
  • Patent number: 10891906
    Abstract: The invention relates to electrophoretic layers containing at least five different particles, and to driving methods for displaying at least five, and in some embodiments, six different colors at each pixel or sub-pixel. The electrophoretic layers may also contain uncharged neutral buoyancy particles, and the driving methods may include special shaking waveform sequences.
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: January 12, 2021
    Assignee: E INK CALIFORNIA, LLC
    Inventor: Craig Lin
  • Patent number: 10891907
    Abstract: A color display device in which each pixel can display four high-quality color states. More specifically, an electrophoretic fluid is provided which comprises four types of particles, dispersed in a solvent or solvent mixture, wherein each type of particle has a different charge profile (polarity and magnitude) and a different optical characteristic. When driven with a two-step process, a mixture of the particles having the highest charge state can be seen at the viewing surface.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: January 12, 2021
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Craig Lin, Ming-Jen Chang
  • Patent number: 10886439
    Abstract: Embodiments of the invention include a semiconductor light emitting device including a semiconductor structure. The semiconductor structure includes a light emitting layer disposed between an n-type region and a p-type region. A wavelength converting structure is disposed in a path of light emitted by the light emitting layer. A diffuse reflector is disposed along a sidewall of the semiconductor light emitting device and the wavelength converting structure. The diffuse reflector includes a pigment. A reflective layer is disposed between the diffuse reflector and the semiconductor structure. The reflective layer is a different material from the diffuse reflector.
    Type: Grant
    Filed: February 10, 2020
    Date of Patent: January 5, 2021
    Assignee: Lumileds LLC
    Inventors: Dawei Lu, Oleg Shchekin