Eastman-kodak Company

Skc Haas Display Films Co., Ltd.

Nitto-denko Corporation

Jehuda Greener

Thomas M Laney

YuanQiao Rao

Debasis Majumdar

Robert P Bourdelais

Peter T Aylward

Charles Chester Anderson

Xiang-Dong Mi

Yeh-Hung Lai

Mridula Nair

Andy Haishung Tsou

Dennis J Massa

James F Elman

Wen-Li A Chen

Richard Dominic Bomba

Michael R Brickey

Jon A Hammerschmidt

Herong Lei

Jose L Garcia

Robert H Fehnel

Gary D Smith

Gary M Mosehauer

Beverly A Contestable

Yongcai Wang

Dinesh Tyagi

Marek W Kowarz

Paul D Yacobucci

Mark Lelental

Narasimharao Dontula

Tamara K Jones

Cheryl J Kaminsky

David B Bailey

Catherine A Falkner

Tomohiro Ishikawa

Kam Chuen Ng

Alfred B Fant

Donald R Preuss

Eric Eugene Arrington

Elizabeth K Priebe

Gary S Freedman

Gary W Visconte

Cathy A Fleischer

Stephen C Meissner

Jeffrey R Gillmor

Robert L Walton

Chul B Park

Michael R Landry

John M Palmeri

Justin Z Gao

Steven J Neerbasch

James M Pearson

Louis P Harasta, Jr

Anthony L Kaye

Michael L Ferranti

Patrick C Lee

Jin Wang

Hani E Naguib

Yuangiao Rao

Julie A Sampson

The present invention provides a composite light guide plate having a thickness of more than about 1 mm, for use in LCD backlights or in general illumination devices. In the fabrication method of the present invention the extrusion roll molding process is combined with coating and lamination steps to enable a cost effective roll-to-roll or roll-to-sheet manufacture of the thick composite light guide plate wherein one or both principal surfaces of the light guide plate contain a pattern to enable extraction and redirection of light by the light guide plate from a light source or multiple light sources placed at one or multiple edges of the light guide plate. The composite light guide plate comprises a patterned film and a pre-cut sheet joined together by an adhesive layer. In order to attain good light extraction efficiency the adhesive layer and the two constituent layers of the light guide plate must be optically matched such that the refractive indices of any two of the three materials of the composite light guide plate can differ by no more than 0.01.

Composite light guide plate

The present invention provides a diffusely-reflecting polarizer comprising:

Diffusely-reflecting polarizer having nearly isotropic continuous phase

A method of forming an optical compensation film includes coating one or more first layers and one or more second layers onto a carrier substrate, and stretching the first layers and second layers simultaneously. The one or more first layers include a polymer having an out-of-plane birefringence (&#x394;n) not more negative than &#x2212;0.005 and not more positive than +0.005, and the one or more second layers include a polymer having an out-of-plane birefringence more negative than &#x2212;0.005 or more positive than +0.005. The overall in-plane retardation (R) of the optical compensation film is greater than 20 nm and the out-of-plane retardation (R) of the optical compensation film is more negative than &#x2212;20 nm or more positive than +20 nm.

Optical compensation films produced by a carrier-web-casting process

Reflective polarizer with polarization splitting microstructure

The present invention provides a diffusely-reflecting polarizer having

A backlight device for a display comprising (1) a side-lit light source, (2) a light guide plate and (3) a turning film comprising a light entry and a light exit surface comprising lenticular elements on the exit surface and prismatic structures on the entry surface, wherein the average values of the parameters of the features and the thickness of the film are selected to provide a peak output angle of &#xb1;10&#xb0; from normal to the light exit surface of the light guide plate and an optical gain of at least 1.25. Also disclosed are methods of making the turning film and a display incorporating the backlight.

Double-sided turning film

A multilayer compensator includes one or more polymeric first layers and one or more polymeric second layers. The first layers comprise a polymer having an out-of-plane birefringence between &#x2212;0.005 and +0.005. The second layers comprise an amorphous polymer having an out-of-plane birefringence that is either less than &#x2212;0.005 or greater than +0.005. The overall in-plane retardation of the multilayer compensator is greater than 20 nm, and the out-of-plane retardation is more negative than &#x2212;20 nm or more positive than +20 nm. The amorphous polymer of the second layer(s) has a glass transition temperature (Tg) such that 110&#xb0; C.&#x2266;Tg&#x2266;180&#xb0; C. when the Rof the multilayer compensator is more negative than &#x2212;20 nm, and 100&#xb0; C.&#x2266;Tg&#x2266;160&#xb0; C. when the Rof the multilayer compensator is more positive than +20 nm.

Multi-layered compensation film using specified Tg material as a birefringent layer

The present invention relates to a method for making an open celled microcellular foam comprising providing at least one foamable polymer and a crosslinking agent in an extruder, injecting at least one blowing agent into said at least one foamable polymer and said crosslinking agent in said extruder, blending said blowing agent injected into said at least one foamable polymer and said crosslinking agent in said extruder, feeding said blended blowing agent, at least one foamable polymer and said crosslinking agent in said extruder to a die, and depressurizing said blended blowing agent, said at least one foamable polymer and said crosslinking agent.

Manufacturing process for open celled microcellular foam

A high-CHDM PET-based support for an imaging element can be annealed relatively rapidly to achieve acceptable core-set and post-process curl properties. The fast annealing response of this material allows effective in-line annealing of the film support, yielding a more efficient manufacturing process with less annealing-induced defects in the imaging support.

Process for rapid annealing of a polyester film base to control film curl

This invention contemplates a prepackaged photographic unit containing a photographic element comprising a transparent polyester film support with improved tongue retrieval performance and acceptable cutting performance in photofinishing equipment.

One-time-use camera containing improved film element

The invention relates to a material comprising a sheet wherein said sheet comprises at least one layer comprising polyether polymeric antistat and thermally processable onium salt.

Antistat of onium salt and polyether polymer

Disclosed is a transparent polymeric film having a top and bottom surface comprising a plurality of complex lenses on at least one surface thereof and containing as its primary ingredient a polymer sufficient to impart to the film a light transmission of at least 92% based on a film thickness of 125 micrometers.

Transparent surface formed complex polymer lenses

The invention relates to a material comprising a web wherein said web comprises at least one surface layer comprising polyether polymeric antistat, extrudable polymer, and compatibilizer wherein said surface layer has a roughness of greater than 0.3 Ra.

Conductive and roughening layer

This invention relates to a poly(ethylene terephthalate)-based photographic multilayer film base having improved properties with regard to cutting and finishing operations compared to conventional PET film base. A specified amount of monomeric units derived from 1,4-cyclohexanedimethanol (CHDM) is used in at least two layers of the multilayer structure, such that the multilayer film base has a specified cutting related property.

Photographic multi-layer film base comprising 1,4-cyclohexane dimethanol

A process for making polyester film base material comprising more than 65 mol % of 1,4-cyclohexanedimethanol (CHDM) of the total glycol component in the polyester material. The film base is prepared by sequentially carrying out the following steps: (a) casting a molten polyester resin in a machine direction onto a casting surface to form a continuous sheet, (b) drafting the sheet by stretching in the machine direction at a stretch ratio of from 2 to 4, and at a temperature ranging from 70&deg; C. to 130&deg; C., (c) tentering the sheet in the transverse direction by stretching at a stretch ratio of from 2 to 4, and at a temperature ranging from 70&deg; C. to 130&deg; C. to obtain a biaxially oriented film, (d) heat-setting the oriented film at an actual temperature of from 160&deg; C. to 200&deg; C., and (e) cooling the heat-set film without substantial detentering to obtain a biaxially oriented, heat-set polyester-based film having a cutting index of 1 to 1.5 and a tensile toughness ranging from 15 to 55 MPa. The invention is also directed towards a silver halide light sensitive photographic element comprising the PET-based film base made by the present process. The photographic film base of the invention exhibits excellent dimensional stability, optical clarity and mechanical strength while also possessing a crystalline morphology that enables finishing by cutting, chopping or perforating techniques at reduced cutting index without requiring a detentering step after heat-setting.

Process for making polyester photographic film base and photographic element comprising said base

Growing community of inventors

Rochester, NY, United States of America

Jehuda Greener