US 12,469,467 B2
Color display device and driving methods therefor
Craig Lin, Fremont, CA (US)
Assigned to E Ink Corporation, Billerica, MA (US)
Filed by E Ink Corporation, Billerica, MA (US)
Filed on Apr. 23, 2024, as Appl. No. 18/643,777.
Application 17/116,052 is a division of application No. 16/503,894, filed on Jul. 5, 2019, granted, now 10,891,906, issued on Jan. 12, 2021.
Application 18/643,777 is a continuation of application No. 17/699,993, filed on Mar. 21, 2022.
Application 17/699,993 is a continuation of application No. 17/116,052, filed on Dec. 9, 2020, granted, now 11,315,505, issued on Apr. 26, 2022.
Application 16/503,894 is a continuation of application No. 15/859,407, filed on Dec. 30, 2017, granted, now 10,380,955, issued on Aug. 13, 2019.
Application 15/859,407 is a continuation in part of application No. 15/168,493, filed on May 31, 2016, granted, now 9,922,603, issued on Mar. 20, 2018.
Application 15/859,407 is a continuation in part of application No. 15/088,465, filed on Apr. 1, 2016, granted, now 10,032,419, issued on Jul. 24, 2018.
Application 15/168,493 is a continuation in part of application No. 14/794,689, filed on Jul. 8, 2015, granted, now 9,671,668, issued on Jun. 6, 2017.
Application 15/168,493 is a continuation in part of application No. 14/626,552, filed on Feb. 19, 2015, granted, now 9,541,814, issued on Jan. 10, 2017.
Claims priority of provisional application 62/241,633, filed on Oct. 14, 2015.
Claims priority of provisional application 62/169,300, filed on Jun. 1, 2015.
Claims priority of provisional application 62/143,631, filed on Apr. 6, 2015.
Claims priority of provisional application 62/061,077, filed on Oct. 7, 2014.
Claims priority of provisional application 62/022,557, filed on Jul. 9, 2014.
Prior Publication US 2024/0282277 A1, Aug. 22, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G09G 3/34 (2006.01); G02F 1/167 (2019.01); G09G 3/20 (2006.01); G02F 1/1675 (2019.01)
CPC G09G 3/344 (2013.01) [G02F 1/167 (2013.01); G09G 3/2003 (2013.01); G02F 2001/1678 (2013.01); G09G 3/2074 (2013.01); G09G 2310/0254 (2013.01); G09G 2310/068 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A driving method for an electrophoretic display comprising a first surface on the viewing side, a second surface on the non-viewing side and an electrophoretic fluid which fluid is sandwiched between a common electrode and a layer of pixel electrodes and comprises a first type of particles, a second type of particles, a third type of particles, a fourth type of particles and a fifth type of particles, all of which are dispersed in a solvent or solvent mixture, wherein:
(a) the five types of pigment particles have optical characteristics differing from one another;
(b) the first and second types of particles carry opposite charge polarities;
(c) the third and fourth types of particles carry the same charge polarity as the first type of particles, and the first type, the third type and the fourth type of particles have progressively lower charge magnitudes; and
(d) the fifth type of particles carries the same charge polarity as the second type of particles but the charge magnitude of the fifth particle is lower than that of the second type of particles, the
method comprising:
(i) applying a first driving voltage having a polarity and a magnitude to a pixel of the electrophoretic display for a first period of time to drive the first type of particles, the third type of particles, and the fourth type of particles towards the first surface, and the second type of particles and the fifth type of particles toward the second surface;
(ii) applying a second driving voltage to the pixel for a second period of time, wherein the second driving voltage has a polarity opposite to the first driving voltage and a magnitude lower than that of the first driving voltage, to drive the first type of particles, the third type of particles, and the fourth type of particles from the first surface towards the second surface, and to drive the second type of particles and the fifth type of particles from the second surface toward the first surface so that a color state of the fifth type of particles appears at the viewing side; and
(iii) applying a third driving voltage to the pixel for a third period of time, wherein the third driving voltage has the same polarity as the first driving voltage and a magnitude lower than that of the first driving voltage, to drive the fifth type of particles from the first surface towards the second surface, and to cause the third type of particles to appear at the first surface on the viewing side.