公开(公告)号：US20240295789A1

公开(公告)日：2024-09-05

申请号：US18662851

申请日：2024-05-13

Applicant: E Ink Corporation

Inventor： Stephen J. TELFER ,  Richard J. PAOLINI, JR. ,  Karl Raymond AMUNDSON ,  Kenneth R. CROUNSE ,  Alain BOUCHARD ,  Sunil Krishna SAINIS

IPC: G02F1/167 ,  G02F1/1675 ,  G09G3/20 ,  G09G3/34

CPC classification number: G02F1/167 ,  G09G3/2003 ,  G09G3/3406 ,  G09G3/344 ,  G02F2001/1678 ,  G09G2310/068

Abstract: A color electrophoretic display with distinct switching areas formed by a segmented top plane electrode opposite driving pixel electrodes. The distinct areas are programmed to switch at different times, thereby reducing the “flashiness” seen by a viewer during an image update. In one embodiment, the color electrophoretic medium of the display includes a reflective white particle and three other sets of particles, each comprising a different color.

公开(公告)号：US20240087496A1

公开(公告)日：2024-03-14

申请号：US18510185

申请日：2023-11-15

Applicant: E INK CORPORATION

Inventor： Demetrious Mark HARRINGTON ,  Kenneth R. CROUNSE ,  Karl Raymond AMUNDSON ,  Teck Ping SIM ,  Matthew J. APREA

IPC: G09G3/20 ,  G09G3/34

CPC classification number: G09G3/2007 ,  G09G3/344 ,  G09G2230/00 ,  G09G2340/16

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.

公开(公告)号：US20180252980A1

公开(公告)日：2018-09-06

申请号：US15910039

申请日：2018-03-02

Applicant: E Ink Corporation

Inventor： Kenneth R. CROUNSE ,  Karl Raymond AMUNDSON ,  Teck Ping SIM ,  Yuval BEN-DOV ,  Chih-Hsiang HO

IPC: G02F1/167 ,  G02F1/00 ,  G09G3/34

Abstract: This invention provides methods of and related apparatus for driving an electro-optic display having a plurality of pixels. The method includes dividing the plurality of pixels into n groups, where n is an integer larger than 1, applying a full clearing waveform to at least one group of the n groups of pixels, and applying a top off waveform to cardinal pixels of the at least one group of pixels.

公开(公告)号：US20230072611A1

公开(公告)日：2023-03-09

申请号：US17982281

申请日：2022-11-07

Applicant: E Ink Corporation

Inventor： Stephen J. TELFER ,  Richard J. PAOLINI, JR. ,  Karl Raymond AMUNDSON ,  Kenneth R. CROUNSE ,  Alain BOUCHARD ,  Sunil Krishna SAINIS

IPC: G02F1/167 ,  G09G3/20 ,  G09G3/34

Abstract: A color electrophoretic display with distinct switching areas formed by a segmented top plane electrode opposite driving pixel electrodes. The distinct areas are programmed to switch at different times, thereby reducing the “flashiness” seen by a viewer during an image update. In one embodiment, the color electrophoretic medium of the display includes a reflective white particle and three other sets of particles, each comprising a different subtractive color.

公开(公告)号：US20230040814A1

公开(公告)日：2023-02-09

申请号：US17876217

申请日：2022-07-28

Applicant: E INK CORPORATION

Inventor： Karl Raymond AMUNDSON ,  Kosta LADAVAC ,  Stephen J. TELFER ,  Dan John LAUBER ,  Darwin Scott BULL

IPC: G02F1/167 ,  G02F1/1676 ,  G02F1/1343 ,  G02F1/16757 ,  G03F7/00

Abstract: An electrophoretic display (100) comprises an electrophoretic medium (114) having electrically charged particles disposed in a fluid and capable of moving through the fluid on application of an electric field. An electrode (104, 120) is disposed adjacent the electrophoretic medium and arranged to apply an electric field thereto. A dielectric layer (106, 118) is disposed between the electrophoretic medium (114) and the electrode (104, 120) and has at least one aperture (107, 119) extending therethrough. The provision of the apertures (107, 119) in the dielectric layers enables the dielectric layers (106, 118) to protect the electrodes (104, 120) while reducing electro-optical kickback. When multiple electrodes (104, 120) are present adjacent the electrophoretic medium (114), more than one or all of the electrodes (104, 120) may be provided with apertured dielectric layers (106, 118).

公开(公告)号：US20220415268A1

公开(公告)日：2022-12-29

申请号：US17899283

申请日：2022-08-30

Applicant: E INK CORPORATION

Inventor： Karl Raymond AMUNDSON ,  Matthew J. APREA ,  Kenneth R. CROUNSE ,  Demetrious Mark HARRINGTON ,  Jason LIN ,  Theodore A. SJODIN ,  Chia-Chen SU

IPC: G09G3/34

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.

公开(公告)号：US20180136532A1

公开(公告)日：2018-05-17

申请号：US15852807

申请日：2017-12-22

Applicant: E INK CORPORATION

Inventor： Richard J. PAOLINI, JR. ,  Stephen BULL ,  Seth J. BISHOP ,  Karl Raymond AMUNDSON ,  Stephen J. TELFER ,  George G. HARRIS

IPC: G02F1/167 ,  G02F1/1362 ,  G02F1/1343

CPC classification number: G02F1/167 ,  G02F1/13439 ,  G02F1/136286 ,  G02F1/1368 ,  G02F1/155 ,  G02F2001/134318 ,  G02F2001/1672 ,  G02F2001/1676

Abstract: A first display includes a layer of electro-optic material with first and second electrodes on opposed sides thereof. One or both electrodes have at least two spaced contacts. Voltage control means are arranged to vary the potential difference between the two spaced contacts attached to the same electrode. A second display includes a layer of electro-optic material with a sequence of at least three electrodes adjacent thereto. Voltage control means vary the potential difference between the first and last electrodes of the sequence. The electrodes of the sequence alternate between two surfaces of the layer of electro-optic material, and have edges that overlap or lie adjacent the preceding and following electrodes of the sequence. The electrodes, other than the first and last, are electrically isolated such that the potential thereof is controlled by passage of current through the layer of electro-optic material. Methods for driving these displays are also provided.

公开(公告)号：US20180102081A1

公开(公告)日：2018-04-12

申请号：US15726864

申请日：2017-10-06

Applicant: E Ink Corporation

Inventor： Yi LU ,  Theodore A. SJODIN ,  Chih-Hsiang HO ,  Karl Raymond AMUNDSON

IPC: G09G3/20 ,  G09G3/34 ,  G02F1/167

CPC classification number: G09G3/2014 ,  G02F1/167 ,  G02F2201/123 ,  G09G3/2011 ,  G09G3/2018 ,  G09G3/3446 ,  G09G3/3648 ,  G09G2310/065 ,  G09G2310/08 ,  G09G2320/0209 ,  G09G2320/0219

Abstract: 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.

公开(公告)号：US20230222985A1

公开(公告)日：2023-07-13

申请号：US18097538

申请日：2023-01-17

Applicant: E INK CORPORATION

Inventor： Pierre-Yves EMELIE ,  Kenneth R. CROUNSE ,  Karl Raymond AMUNDSON

IPC: G09G3/34

CPC classification number: G09G3/344 ,  G09G3/3433 ,  G09G2320/048 ,  G09G2320/0257 ,  G09G2320/0209 ,  G09G2320/045 ,  G09G2340/12 ,  G09G2310/08 ,  G09G2300/06 ,  G09G2320/041 ,  Y02E50/10 ,  G09G2300/0473 ,  G09G2310/04 ,  Y02E50/30

Abstract: There are provided display controllers and driving methods related to those described in US Published Patent Application No. 2013/0194250. These include (a) a display controller having an update buffer, means for removing from the update buffer pixels not requiring updating, and means to ensure that pixels having certain special states are not removed from the update buffer; (b) a method of driving a bistable display wherein, in a pixel undergoing a white-to-white transition and lying adjacent another pixel undergoing a visible transition, there is applied to the pixel one or more balanced pulse pairs and at least one top-off pulse; (c) a method of driving a bistable display by overlaying a non-rectangular item over a pre-existing image content and then removing the item, where only pixels in the region of the item perform transitions (including self-transitions); and (d) a method of driving a bistable display in which a proportion of background pixels not undergoing an optical change are subjected to a refresh pulse to correct optical state drift.

公开(公告)号：US20230056258A1

公开(公告)日：2023-02-23

申请号：US17890312

申请日：2022-08-18

Applicant: E Ink Corporation

Inventor： Aaron CHEN ,  Teck Ping SIM ,  Kenneth R. CROUNSE ,  Karl Raymond AMUNDSON

IPC: G09G3/34

Abstract: Methods are described for driving an electro-optic display having a plurality of display pixels. Each of the display pixels is associated with a display transistor. The method includes the following steps in order. A first voltage is applied to a first display transistor associated with a first display pixel of the plurality of display pixels. The first voltage is applied during at least one frame of a driving waveform. A second voltage is applied to the first display transistor associated with the first display pixel. The second voltage has a non-zero amplitude less than the first voltage and is applied during the last frame of the driving waveform. The amplitude of the second voltage is based on a voltage offset value and a sum of remnant voltages each frame of the driving waveform contributes to the first display pixel when the first voltage is applied to the first display transistor