Clinton I Braganza

US Patent:

20140016076, Jan 16, 2014

Filed:

Jul 16, 2012

Appl. No.:

13/549907

Inventors:

Clinton BRAGANZA - Kent OH, US
Mathew BOWSER - Hubbard OH, US
John KRINOCK - North Canton OH, US
Forrest NICHOLSON - Kent OH, US

Assignee:

KENT DISPLAYS INCORPORATED - Kent OH

International Classification:

G02F 1/1339
B32B 38/04
B32B 37/12
B32B 37/14

US Classification:

349153, 156146

Abstract:

A method of making an electrooptical display comprises providing a first substrate and a second substrate. A first layer of electrically conductive material is disposed on the first substrate and a second layer of electrically conductive material is disposed on the second substrate. A bead of adhesive gasket material is formed over the first substrate. Light modulating material is flowed onto the first layer of electrically conductive material and over the bead. The second substrate is positioned in contact with the light modulating material in proximity to the first substrate. The gasket material is cured.

US Patent:

20130314621, Nov 28, 2013

Filed:

May 22, 2012

Appl. No.:

13/477602

Inventors:

Erica N. MONTBACH - Kent OH, US
Asad A. KHAN - Kent OH, US
Clinton I. BRAGANZA - Kent OH, US
Nithya VENKATARMAN - Wooster OH, US

Assignee:

KENT DISPLAYS INCORPORATED - Kent OH

International Classification:

G02F 1/1335
G02F 1/1333

US Classification:

349 12, 349110

Abstract:

An electronic display includes electrically conductive layers. At least one active layer is disposed between adjacent electrically conductive layers. The active layer includes cholesteric liquid crystal material. The display includes a front transparent substrate behind which the electrically conductive layers are disposed. A back component is disposed at a back of the display below the active layer. At least one patterned layer is disposed at at least one of the following locations: on, in or near the front substrate and as an interlayer between the front substrate and the back component. The patterned layer is opaque or semitransparent. Electronic circuitry applies a voltage to the conductive layers that enables at least one of erasing or writing of the active layer. The active layer and the patterned layer cooperate to produce an image on the display.

US Patent:

20130314622, Nov 28, 2013

Filed:

May 22, 2012

Appl. No.:

13/477638

Inventors:

Clinton I. BRAGANZA - Kent OH, US
Matthew SCHLEMMER - Kent OH, US
Erica N. MONTBACH - Kent OH, US
Asad A. KHAN - KENT OH, US

Assignee:

KENT DISPLAYS INCORPORATED - Kent OH

International Classification:

G02F 1/1335
G02F 1/13357

US Classification:

349 12, 349106, 349 65

Abstract:

An electronic display includes electrically conductive layers. An active layer is disposed between adjacent electrically conductive layers. The active layer includes cholesteric liquid crystal material. At least one transparent front substrate is disposed adjacent one of the electrically conductive layers near a front of the display. A semitransparent back layer absorbs light that passes through the active layer, reflects grey light or light of a color and is light transmitting. Electronic circuitry applies a voltage to the conductive layers that enables at least one of erasing or writing of the active layer.

US Patent:

20220365385, Nov 17, 2022

Filed:

May 17, 2021

Appl. No.:

17/321866

Inventors:

- Kent OH, US
Clinton BRAGANZA - Kent OH, US
Anthony DANIELS - Kent OH, US

International Classification:

G02F 1/137
G02F 1/1334
G02F 1/1335

Abstract:

A liquid crystal device that is flexible and includes a cholesteric liquid crystal material erased by flexing. Totally free of electronics and electrically conductive electrodes, the liquid crystal device takes advantage of a reverse mode effect observed in cholesteric liquid crystals whereby pressure applied to the device changes a reflective texture to a transmissive texture to create an image. The image is erased and the device reinitialized by flexing to create reflective texture surroundings.

US Patent:

20230027561, Jan 26, 2023

Filed:

Jul 20, 2021

Appl. No.:

17/380812

Inventors:

- Kent OH, US
Nathan HIRT - Kent OH, US
Bryan OWEN - Kent OH, US
Clinton BRAGANZA - Kent OH, US
Hunter MORRIS - Kent OH, US

International Classification:

G02F 1/137
G02F 1/1333
G02F 1/1339
G06F 3/0354

Abstract:

A liquid crystal writing device is erased by a stylus. The liquid crystal writing device includes a liquid crystal layer including cholesteric liquid crystal material. A user applies pressure to a flexible substrate that changes reflectivity of the cholesteric liquid crystal material to form images on the liquid crystal writing device. The liquid crystal layer is disposed between electrically conductive layers. Writing device terminals are electrically conductive and connected to the electrically conductive layers. The stylus includes stylus electronics adapted to apply an erase voltage or erase voltage waveform to the writing device terminals.

US Patent:

20200026106, Jan 23, 2020

Filed:

Jul 20, 2018

Appl. No.:

16/040968

Inventors:

- Kent OH, US
Erica MONTBACH - Kent OH, US
Forrest NICHOLSON - Kent OH, US
Clinton BRAGANZA - Kent OH, US

International Classification:

G02F 1/1334
G02F 1/137
G02F 1/1335
C09J 7/25
B43L 1/00

Abstract:

A liquid crystal writing device with enhanced line acuity includes the following features. Included is a front writing surface. A liquid crystal layer includes a dispersion of cholesteric liquid crystal and polymer, wherein a reflectance of the cholesteric liquid crystal changes in response to pressure applied to the front writing surface so as to form an image on the liquid crystal layer. The liquid crystal layer is disposed between electrically conductive layers. A second of the electrically conductive layers is more distal from the front writing surface than a first of the electrically conductive layers is from the front writing surface. A backing supports the pressure applied to the front writing surface. An adhesive layer is disposed between the second of the electrically conductive layers and the backing. A line acuity of the image has a value of not more than 3.0 determined according to the Line Acuity Measurement Method of this disclosure.

US Patent:

20190056611, Feb 21, 2019

Filed:

Aug 14, 2018

Appl. No.:

16/103500

Inventors:

- Kent OH, US
Clinton BRAGANZA - Kent OH, US

International Classification:

G02F 1/133
G02F 1/1333
G02F 1/1334
G02F 1/137
G09G 3/36
G06F 3/041
G06F 3/0488

Abstract:

A liquid crystal eWriter device with user adjustable select erase includes a front substrate formed of a flexible, polymeric material. Electrically conductive layers are spaced apart from each other. A dispersion layer includes a dispersion of cholesteric liquid crystal material and polymer disposed between the electrically conductive layers, wherein pressure applied to the front substrate changes a reflectance of the cholesteric liquid crystal material forming an image. Electronic circuitry is adapted to fully and selectively erase the image by applying a full erase voltage waveform and a select erase voltage waveform, respectively, to the electrically conductive layers. The image is select erased by applying the select erase voltage waveform to the electrically conductive layers while applying pressure to the front substrate and tracing a portion of the image. At least one SELECT ERASE actuator is included in the electronic circuitry and enables the user to adjust the select erase voltage waveform so as to adjust select erasing of the image. Also featured is a method of making select erase adjustments on the eWriter.

US Patent:

20160342023, Nov 24, 2016

Filed:

May 20, 2016

Appl. No.:

15/160767

Inventors:

- Kent OH, US
Asad A. KHAN - Kent OH, US
Mauricio ECHEVERRI - Akron OH, US
Clinton I. BRAGANZA - Kent OH, US

International Classification:

G02F 1/1335
C09K 19/54
C09K 19/36
G02F 1/1334
G02F 1/1339

Abstract:

An enhanced brightness cholesteric liquid crystal eWriter device for writing and drawing includes substrates and electrically conductive layers disposed on the substrates. There is a gap, d, between the electrically conductive layers. Polymer dispersed cholesteric liquid crystal material is disposed in the gap. The polymer dispersed cholesteric liquid crystal material exhibits a written reflectance, R, which occurs in response to pressure applied to one of the substrates that changes reflectance of the cholesteric liquid crystal material. The device follows the relationship Rd1d2, where Rd2 is a written reflectance of an eWriter device of gap d2 and Rd1 is written reflectance of another eWriter device of gap d1. Further, a cholesteric liquid crystal eWriter device includes a layer of cholesteric liquid crystal material in a cell gap, d, wherein d