IP Library Granted Patent US 11,789,330
Granted Patent B2
US 11,789,330 · App. 16/512,726 · Granted Oct 17, 2023

Electro-optic displays and driving methods

Inventor: Craig Lin (Fremont, CA)
Assignee: E Ink California, LLC
G02F1/167G09G3/2074G09G3/344G09G2300/08G09G2310/02G09G2310/06G09G2320/0204
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Quick Facts
Patent No.
US 11,789,330
App. No.
16/512,726
Granted
Oct 17, 2023
Kind
B2
Abstract

A driving method for driving a display comprising an electrophoretic material having at least one type of colored pigment particle, the method includes applying at least one pulse pair to reset the at least one type of colored pigment particle, applying a separation pulse, and applying a second pulse pair to reset the at least one type of colored pigment particle.

Claims (24)

1. A driving method for driving a display having a front plane laminate, wherein the front plane laminate comprises:

a plurality of microcells filled with an electrophoretic material having at least one type of colored pigment particle disposed in a fluid, and

a sealing material that seals the electrophoretic material within the plurality of microcells,

the driving method comprising:

applying a first shaking waveform comprising at least one first pulse pair to reset the at least one type of colored pigment particle, wherein a duration of the first shaking waveform is based on a resistance of the sealing material;

applying a first separation pulse after the at least one first pulse pair, wherein a duration of the first separation pulse is not long enough to drive the at least one type of colored pigment particle to an extreme optical state;

applying a second shaking waveform comprising at least one second pulse pair to reset the at least one type of colored pigment particle,

wherein a duration of the second shaking waveform is based on the resistance of the sealing material,

wherein the first separation pulse separates the at least one first pulse pair from the at least one second pulse pair,

wherein the first separation pulse maintains a constant amplitude and a constant negative polarity for the duration of the first separation pulse and is the only pulse between the at least one first pulse pair and the at least one second pulse pair, and

wherein the first shaking waveform and the second shaking waveform are configured to drive the at least one type of colored pigment particle to a mixed state in the fluid; and

applying a second separation pulse after the at least one second pulse pair, wherein a duration of the second separation pulse is not long enough to drive the at least one type of colored pigment particle to an extreme optical state.

2. The driving method of claim 1 , wherein the at least one first pulse pair includes a pulse having a positive amplitude and a pulse having a negative amplitude.

3. The driving method of claim 2 , wherein the pulse having the positive amplitude and the pulse having the negative amplitude have the same duration.

4. The driving method of claim 2 , wherein the first separation pulse has the same amplitude as the pulse having the negative amplitude.

5. The driving method of claim 1 , wherein the first separation pulse has a longer duration than the at least one first pulse pair.

6. The driving method of claim 1 wherein the at least one first pulse pair has a different duration than the at least one second pulse pair.

7. The driving method of claim 1 , wherein the at least one first pulse pair is DC balanced.

8. The driving method of claim 1 , wherein the driving method is DC balanced.

9. The driving method of claim 1 , wherein the extreme optical state comprises one of a full black state or a full white state on the display.

10. The driving method of claim 1 , wherein the electrophoretic material has at least three types of colored pigment particles disposed in the fluid.

11. The driving method of claim 10 , wherein the first shaking waveform and the second shaking waveform are configured to drive the at least three types of colored pigment particles to a mixed state in the fluid.

12. The driving method of claim 1 , wherein the duration of the first shaking waveform increases as the resistance of the sealing material increases and decreases as the resistance of the sealing material decreases.

13. The driving method of claim 1 , wherein the duration of the second shaking waveform increases as the resistance of the sealing material increases and decreases as the resistance of the sealing material decreases.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 5, 2023
From: E INK CALIFORNIA, LLC
To: E INK CORPORATION
Reel/Frame 065154/0965 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 26, 2019
From: LIN, CRAIG
To: E INK CALIFORNIA, LLC
Reel/Frame 049870/0434 →
Continuity (2)
Provisional Application 62699117 · Jul 17, 2018
Related Publication 20200026143A1 · Jan 23, 2020
Cited By (6)
US 12,408,437 US 12,408,438 US 12,426,376 US 12,426,377 US 12,464,825 US 12,501,709