Jillian B Smith

US Patent:

20200272017, Aug 27, 2020

Filed:

Jan 29, 2020

Appl. No.:

16/776042

Inventors:

- Billerica MA, US
Peter Carsten Bailey WIDGER - Nashua NH, US
Jillian SMITH - Dorchester MA, US
Jay William ANSETH - Canton MA, US
Craig A. HERB - Medford MA, US
George G. HARRIS - Woburn MA, US
Mark Benjamin ROMANOWSKY - Cambridge MA, US

International Classification:

G02F 1/167
G02F 1/1676
G02F 1/16757
C08L 33/12
C08K 3/04
G02F 1/1681

Abstract:

An electro-optic media includes either a plurality of microcapsules in a binder, a polymeric sheet containing sealed microcells, or droplets in a continuous polymeric phase. Each of the microcapsules, microcells, or droplets contain a dispersion that includes a plurality of charged composite particles and a suspending fluid, and the charged particles move through the suspending fluid under the influence of an electric field. The composite particles include one or more types of pigment particles that are at least partially coated with a polymeric material. Each of the binder, polymeric sheet, continuous polymeric phase, the charged composite particles, and the suspending fluid have an index of refraction, and a difference between the index of refraction of the composite particles and at least one of the binder, polymeric sheet, continuous polymeric phase, and solvent is less than or equal to 0.05 at 550 nm.

US Patent:

20180364542, Dec 20, 2018

Filed:

Jun 14, 2018

Appl. No.:

16/008180

Inventors:

- Billerica MA, US
Jay William ANSETH - Canton MA, US
Mark Benjamin ROMANOWSKY - Cambridge MA, US
Jillian SMITH - Dorchester MA, US
Stephen J. TELFER - Arlington MA, US
Craig Alan BREEN - Arlington MA, US
Stephen BULL - Windham NH, US

International Classification:

G02F 1/167
G09G 3/34
C09B 67/08

Abstract:

A variable transmission film may include an electrophoretic medium having a plurality of capsules and a binder, each capsule containing a plurality of electrically charged particles and a fluid, the charged particles being movable by application of an electric field and being capable of being switched between an open state and a closed state. The film may include at least one of a binder containing fish gelatin and a polyanion; a binder containing one or more tinting agents; capsules containing charge control agents, such as an oligoamine-terminated polyolefin and a branched chain fatty acid comprising at least 8 carbon atoms; a selection of capsules in which at least 60% have a diameter between 50 μm and 90 μm and at least 15% have a diameter between 20 μm and 49 μm; a tinted adhesive layer; and a fluid selected from one or more nonconjugated olefinic hydrocarbons.