公开(公告)号：US12100369B2

公开(公告)日：2024-09-24

申请号：US17980019

申请日：2022-11-03

Applicant: E INK CORPORATION

Inventor： Kenneth R. Crounse ,  Stephen J. Telfer ,  Edward Buckley ,  Sunil Krishna Sainis

IPC: G09G5/02 ,  G09G3/20 ,  G09G3/34 ,  G09G3/38 ,  G09G5/06 ,  H04N1/60 ,  H04N5/57 ,  H04N9/64 ,  H04N9/69

CPC classification number: G09G5/06 ,  G09G3/2003 ,  G09G3/2059 ,  G09G3/344 ,  G09G3/38 ,  G09G3/2044 ,  G09G2320/0209 ,  G09G2320/0214 ,  G09G2320/0242 ,  G09G2320/0666 ,  G09G2340/06

Abstract: A system for rendering color images on an electro-optic display when the electro-optic display has a color gamut with a limited palette of primary colors, and/or the gamut is poorly structured (i.e., not a spheroid or obloid). The system uses an iterative process to identify the best color for a given pixel from a palette that is modified to diffuse the color error over the entire electro-optic display. The system additionally accounts for variations in color that are caused by cross-talk between nearby pixels.

公开(公告)号：US12020658B2

公开(公告)日：2024-06-25

申请号：US18083743

申请日：2022-12-19

Applicant: E INK CORPORATION

Inventor： Kenneth R. Crounse ,  Yuval Ben-Dov ,  Stephen J. Telfer ,  Jaya Kumar

IPC: G09G3/34 ,  G09G5/06

CPC classification number: G09G3/344 ,  G09G5/06 ,  G09G2230/00

Abstract: A color electrophoretic display that includes sets of duplicative waveforms to reduce visible artifacts during image updates. Such methods include driving extra pixels where the boundary between a driven and undriven area would otherwise lead to artifact by providing paired sets of driving instructions, allowing the undriven area to be driven while maintain the desired (undriven) optical state.

公开(公告)号：US11984088B2

公开(公告)日：2024-05-14

申请号：US18138791

申请日：2023-04-25

Applicant: E INK CORPORATION

Inventor： Kenneth R. Crounse

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

CPC classification number: G09G3/344 ,  G09G3/2096 ,  G09G2320/0285 ,  G09G2320/041 ,  G09G2320/0666 ,  G09G2340/06

Abstract: A color display, including an electrophoretic medium, wherein the display includes a processor configured to transform image source colors, which are typically standard RGB values, to electrophoretic display device colors, for example ACeP device colors, for displaying the image in the best possible colors on the color display. The processor uses a look up table that depends upon eight primary colors that are produced by the electrophoretic medium.

公开(公告)号：US11922893B2

公开(公告)日：2024-03-05

申请号：US18079300

申请日：2022-12-12

Applicant: E INK CORPORATION

Inventor： Kenneth R. Crounse ,  Stephen J. Telfer ,  Ana L. Lattes ,  Christopher L Hoogeboom ,  Richard J. Paolini, Jr. ,  Seth J. Bishop

IPC: G09G3/34

CPC classification number: G09G3/344 ,  G09G2300/0426 ,  G09G2300/0842

Abstract: Improved methods for driving an active matrix of pixel electrodes controlled with thin film transistors when the voltage on a top electrode is being altered between driving frames. The methods described increase performance by providing smaller swings in the overall voltage between the top electrode and pixel electrode while reducing stress on the thin film transistor.

公开(公告)号：US20220068229A1

公开(公告)日：2022-03-03

申请号：US17462257

申请日：2021-08-31

Applicant: E Ink Corporation

Inventor： Teck Ping Sim ,  Paroma Palchoudhuri ,  Kenneth R. Crounse ,  Yuval Ben-Dov ,  Karl Raymond Amundson

IPC: G09G3/34 ,  G02F1/167 ,  G02F1/1685 ,  G02F1/1679

Abstract: A method for driving an electrophoretic display having a plurality of display pixels, the method comprising dividing the plurality of display pixels into a plurality of groups, updating one group of display pixels from the plurality of groups of display pixels, the one group of display pixels includes at least n number of adjacent display pixels being updated at the same time, wherein n is an integer greater than or equal to 2, and applying an edge clearing waveform to no more than (n×2)+2 number of cardinal pixels of the one group of display pixels.

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.

公开(公告)号：US11145235B2

公开(公告)日：2021-10-12

申请号：US15632730

申请日：2017-06-26

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

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：US10997930B2

公开(公告)日：2021-05-04

申请号：US15165795

申请日：2016-05-26

Applicant: E Ink Corporation

Inventor： Kenneth R. Crounse

IPC: G09G3/34

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.

公开(公告)号：US10852568B2

公开(公告)日：2020-12-01

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: G09G3/34 ,  G02F1/00 ,  G02F1/1685

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：US10657869B2

公开(公告)日：2020-05-19

申请号：US15602369

申请日：2017-05-23

Applicant: E Ink Corporation

Inventor： Stephen J. Telfer ,  Richard J. Paolini, Jr. ,  Karl Raymond Amundson ,  Kenneth R. Crounse ,  Alain Bouchard ,  Sunil Krishna Sainis

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

Abstract: An electrophoretic medium includes 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.