E Ink Corporation

Michael D McCreary

Richard J Paolini, Jr

Charles Howie Honeyman

Thomas Henry Whitesides

Guy Danner

Gregg Michael Duthaler

Shamus Ford Patry

Joseph M Jacobson

Bin Wu

Karl Raymond Amundson

George G Harris

Richard M Webber

Stephen J Telfer

Michael D Walls

Carl Philip Taussig

Michael L Steiner

Teck Ping Sim

Craig A Herb

John E Ritter

Yi Lu

Seungman Sohn

Samantha Morrill

Paul Apen

Joseph Fillion

Paul Stephen Drzaic

Robert Waverly Zehner

Ian D Morrison

Kosta Ladavac

Russell J Wilcox

Sunil Krishna Sainis

Jianna Wang

Anthony Edward Pullen

Alexi Arango

Stephen P Dudek

Emily J Pratt

David John Cole

Caprice L Gray

Guy M Danner

Thomas H Whitesides

Jr Richard J Paolini

Richard Paolini

A method for driving electro-optic displays including electro-optic material disposed between a common electrode and a backplane. The backplane includes an array of pixel electrodes, each coupled to a transistor. A display controller applies waveforms to the pixel electrodes. The method includes applying first measurement waveforms to a first portion of the pixel electrodes. During each frame of the first measurement waveforms, the same time-dependent voltages are applied to each pixel electrode of the first portion of pixel electrodes. The method includes determining the impedance of the electro-optic material in proximity to the first portion of pixel electrodes based on a measurement of the current flowing through a current measurement circuit and the time-dependent voltages applied to each pixel electrode during the first measurement waveforms, and selecting driving waveforms based on the impedance of the electro-optic material in proximity to the first portion of pixel electrodes.

Methods for measuring electrical properties of electro-optic displays

An electro-optic device comprising electrophoretic medium including a dispersion of a plurality of particles in a fluid configured to migrate within the fluid in a direction responsive to an applied electric field. The plurality of particles include a first type of particles having a first charge of a first charge polarity, a second type of particles having a second charge of a second charge polarity, and a third type of particles having a third charge of the second charge polarity. The first charge polarity is opposite to the second charge polarity, and the third type of particles are configured to migrate within the fluid in a direction responsive to an applied magnetic field gradient.

Electro-optic media and writable display incorporating the same

A dielectrophoretic display is shifted from a low frequency closed state to a high frequency open state via at least one, and preferably several, intermediate frequency states; the use of such multiple frequency steps reduces flicker during the transition. A second type of dielectrophoretic display has a light-transmissive electrode through which the dielectrophoretic medium can be viewed and a conductor connected to the light-transmissive electrode at several points to reduce voltage variations within the light-transmissive electrode.

Methods for driving electrophoretic displays using dielectrophoretic forces

Electro-optic, especially electrophoretic, displays are used in variety of architectural and furniture applications, including a tile () comprising an electro-optic layer () capable of changing the color of the file, front and multiple rear electrodes and a light-transmissive polymeric layer (), the exposed surface of which is textured to provide a plurality of facets inclined to the plane of the tile (), the rear electrodes being aligned with the facets. A variable color writable board is also provided.

Applications of electro-optic displays

A wavelength selective reflection display () comprises a wavelength selective reflection medium () and a backing member () having a first, non-reflective optical state, and a second, reflective optical state. Both the wavelength selective reflection medium () and the backing member () are divided into pixels (), and the backing member () is switchable between its first and second optical states on a pixel-by-pixel basis. The pixels of the backing member () are substantially aligned with those of the wavelength selective reflection medium ().

Electro-optic displays

A first electro-optic display comprises first and second substrates, and an adhesive layer and a layer of electro-optic material disposed between the first and second substrates, the adhesive layer comprising a mixture of a polymeric adhesive material and a hydroxyl containing polymer having a number average molecular weight not greater than about 5000. A second electro-optic display is similar to the first but has an adhesive layer comprising a thermally-activated cross-linking agent to reduce void growth when the display is subjected to temperature changes. A third electro-optic display, intended for writing with a stylus or similar instrument, is produced by forming a layer of an electro-optic material on an electrode; depositing a substantially solvent-free polymerizable liquid material over the electro-optic material; and polymerizing the polymerizable liquid material.

Electro-optic displays, and materials for use therein

Video displays using relatively low frame rates of about 10 to about 20 frames per second, but having acceptable video quality are described. The displays may use bistable media, and may be driven such that the medium, when driven, changes its optical properties continuously during the driving of each frame. The displays may use an electro-optic medium such that the frame period is from about 50 to about 200 per cent of the switching time of the electro-optic medium at the driving voltage used.

Methods for driving video electro-optic displays

Various types of edge seals for protecting electro-optic displays against environmental contaminants are described. In one type of seal, the electro-optic layer is sandwiched between a backplane and a protective sheet and a sealing material extends between the backplane and the protective sheet. In other seals, the protective sheet is secured to the backplane or to a second protective sheet adjacent the backplane. The electro-optic layer can also be sealed between two layers of adhesive or between one layer of adhesive and the backplane. Other seals make use of flexible tapes extending around the periphery of the display.

Electro-optic display with edge seal

Growing community of inventors

Acton, MA, United States of America

Michael D McCreary