3m Innovative Properties Company

Nitto-denko Corporation

3m Innovation Properties Company

Matthew B Johnson

Adam D Haag

Ryan T Fabick

Martin E Denker

Kristy A Gillette

Carl A Stover

William Ward Merrill

Gilles J Benoit

Quinn D Sanford

Timothy J Nevitt

Richard C Allen

Kevin M Hamer

Michelle Lund Toy

Joan M Strobel

Fred J Roska

Brianna N Wheeler

Steven J Rhyner

John F VanDerlofske, Iii

Takashi Fujita

Stephan J Pankratz

Brianna N Nieson

Sun-Yong Park

William F Edmonds

Eileen M Franey

Song-Geun Lee

Timothy J Hebrink

Gary Timothy Boyd

Philip Edwin Watson

Sergey Lamansky

Kristopher J Derks

Keith Michael Kotchick

Mark B O'Neill

Fuming B Li

Edward J Kivel

Bert T Chien

Seong Taek Lee

Gregory Edward Gilligan

Nathaniel K Naismith

Jonah Shaver

Richard J Thompson

Chikara Abe

Albert I Everaerts

Hiroki Matsuda

Minoru Miyatake

William Blake Kolb

Stephen A Johnson

Kenneth A Epstein

Yi-Chen Chen

Tri Dinh Pham

Joan M Noyola

Steven P Floeder

Robert M Biegler

Jeffery N Jackson

Arthur L Kotz

James E Lockridge

Karissa L Eckert

Jason S Petaja

Stephen J Etzkorn

William B Black

Lin Zhao

Hiroaki Sawada

Michael L Ruegsegger

Guy M Kallman

Joseph P Attard

Fuguo Xu

Jeffrey W Hagen

Hideaki Shirotori

Sebastian F Zehentmaier

Tze Yuan Wang

Yu Hsin Lu

David J McDaniel

Carley A Haroldson

Ryan J Eismin

Steven H C Kong

Robert L Endres

John M Klaeser

John F Iii Vanderlofske

David J Mcdaniel

A windshield of a vehicle includes a reflective polarizer. The windshield is configured to receive and reflect an image light emitted by a display toward a passenger of the vehicle, such that for a substantially normally incident light, the windshield has first and second reflection spectra versus wavelength for the incident light polarized along respective first and second directions. The first reflection spectrum includes a plurality of reflection bands. Each of the reflection bands has a maximum reflectance R1max between 20% and 80%. Between each pair of adjacent reflection bands in the plurality of reflection bands, the first reflection spectrum has a minimum reflectance R1min between 5% and 25%. In the visible wavelength range, the second reflection spectrum has a maximum reflectance R2max and a minimum reflectance R2min, such that R2max and R2min are within 15% of each other.

Windshield, display system, and reflective polarizer

An optical stack includes a reflective polarizer including a plurality of interference layers and an absorbing polarizer disposed on the reflective polarizer. The plurality of interference layers transmits at least about 85% of an incident light having a first polarization state, reflects at least about 80% of the incident light having a second polarization state, and transmits less than about 0.1% of the incident light having the second polarization state. The absorbing polarizer has a first transmittance for the first polarization state and a second transmittance for the second polarization state. An average of the first and second transmittances is greater than about 0.46. The second transmittance has a first standard deviation. The optical stack has a transmittance for the second polarization state having a second standard deviation which is less than the first standard deviation by at least about 10%. A display includes the optical stack.

Optical stack and display

A mirror system for a side- or rear-view mirror of a vehicle includes a light absorbing layer and an optical film having a plurality of layers disposed on the light absorbing layer. For substantially normally incident light and a blue, green, and red wavelength range extending from about 420-485 nm, 525-575 nm and 625-740 nm, respectively, and for at least one polarization state, the plurality of layers includes a reflection band having a substantially flat top region at least 100 nm wide. The reflection band includes left and right band edges at respective short and long wavelength sides. The plurality of layers has an average optical reflectance R1 of greater than about 70% and a standard of deviation of less than about 5% in the substantially flat top region. An average optical reflectance Rb is less than about 0.8R1 in the blue wavelength range.

Optical systems for side/rear view mirror of a vehicle

A glass laminate including first and second glass layers, a reflective film having opposed first and second major surfaces and disposed between the first and second glass layers with the first and second major surfaces facing the respective first and second glass layers, a first adhesive layer disposed between and bonding together the first glass layer and the reflective film, and a second adhesive layer disposed between and bonding together the second glass layer and the reflective film is described. The second adhesive layer is thicker than the first adhesive layer such that the first major surface of the reflective film is separated from an outermost major surface of the first glass layer by a distance d1, the second major surface of the reflective film is separated from an outermost major surface of the second glass layer by a distance d2, and 0.05≤d1/d2≤0.9.

Glass laminate including reflective film

An optical system includes an extended illumination source configured to emit light from an extended emission surface thereof toward a display panel. The emitted light includes substantially distinct blue, green and red emission spectra having respective blue, green and red peaks at respective blue, green and red peak wavelengths, and corresponding blue, green and red full widths at half maxima (FWHMs). The blue FWHM extends from a smaller blue wavelength to a longer blue wavelength. The optical system further includes reflective polarizer disposed on the emission surface of the extended illumination source. The reflective polarizer includes a plurality of first polymeric layers. The optical system also includes an optical filter disposed between the reflective polarizer and the emission surface of the extended illumination source.

Optical system and optical combination

A multilayer optical film includes a plurality of alternating polymeric first and second layers numbering at least 20 in total. The polymeric first layers include between about 10% and 50% by weight of polyethylene terephthalate and between about 50% and 90% by weight of polyethylene naphthalate. For a substantially normally incident light and for a visible wavelength range, the multilayer optical film has respective average optical transmissions of between about 10% and 30% when the incident light is polarized along a first direction and greater than about 60% when the incident light is polarized along an in-plane orthogonal second direction. For a p-polarized incident light and for at least one wavelength in an infrared wavelength range, the multilayer optical film has optical transmissions T1 and T2 for respective incident angles of less than about 10 degrees and greater than about 40 degrees, wherein T2−T1 is less than about 40%.

Multilayer optical film, roll of multilayer optical film, backlight, and display system

A heads-up display includes a windshield with a standardized wedge profile and an embedded reflective polarizer and a display. The reflective polarizer is disposed between, and spaced apart from, opposing outermost first and second major glass surfaces of the windshield. The heads-up display forms a virtual image for viewing by the eye of a passenger. An image emitted by the display may include a first image ray emitted from a predetermined region of the display and incident on the outermost first major glass surface of the windshield at an angle of incidence greater than about 60 degrees, with at least 90% of the incident first emitted image ray polarized in a plane of incidence of the first emitted image ray.

Standardized wedge profile in glass laminate for ghost reduction

An optical film includes a plurality of alternating first and second polymeric layers, such that the first polymeric layers have a smaller average in-plane index of refraction than the second polymeric layers and the first polymeric layers have a glass transition temperature of at least 107 deg. C. The optical film may be a reflective polarizer. An optical stack includes a linear absorbing polarizer and the reflective polarizer disposed on, and bonded to, the absorbing polarizer. The reflective polarizer has an optical reflectance of at least 60% for a first polarization state and an optical transmittance of at least 60% for an orthogonal second polarization state. When heated at 105 deg. C. for 15 minutes, a difference in shrinkage of the reflective polarizer and the absorbing polarizer along the first and second polarization states is greater than about zero and 0.2%, respectively.

Optical film and optical stack

An optical film includes a plurality of first layers disposed on a plurality of polymeric second layers. Each of at least 30% of the first layers includes at least 30% by weight of an inorganic material. For a substantially normally incident light, a blue wavelength range extending from about 420 mn to about 480 m, a green wavelength range extending from about 490 nm to about 560 in, and a red wavelength range extending from about 590 nm to about 670 nm, the optical film and the plurality of second layers have respective average optical reflectances Rof(b) and R2() in the blue wavelength range, Rof(g) and R2() in the green wavelength range, and Rof(r) and R2() in the red wavelength range, where 0≤Rof(b)−R2()≤25%; Rof(g)−R2()>30%; and each of Rof(r) and R2() is greater than about 60% and |Rof(r)−R2()| is less than about 20%.

Optical film, backlight and display system

Optical films are described. In particular, optical films including a reflective polarizer portion and an infrared portion, with no adhesive between these two portions, are described. These optical films may be particularly suitable for combiner applications, including automotive heads up display applications with demanding ambient environments.

Optical film including infrared reflector and multilayer reflective polarizer with crystalline low index layers

An optical stack for reflecting and transmitting light in a predetermined wavelength range includes stacked first and second optical films, the predetermined wavelength range defining a first wavelength range and a remaining wavelength range. For normally incident light and for each wavelength in a first wavelength range, the first optical film substantially reflects light having a first polarization state, and substantially transmits light having a second polarization state. For each of the first and second polarization states, for wavelengths in the first wavelength range, the second optical film has a maximum optical transmittance Tfor light incident at a first incident angle, and an optical transmittance T/2 for light incident at a second incident angle, where the second incident angle is greater than the first incident angle by less than about 50 degrees. For wavelengths in the remaining wavelength range, the second optical film reflects at least 80% of light.

Display optical film and backlight unit

An optical film includes a plurality of alternating first and second layers. The first layers have a first in-plane birefringence, the second layers have a second in-plane birefringence, and the second in-plane birefringence is less than the first in-plane birefringence and greater than 0.03. The first layers may include polyethylene terephthalate homopolymer and the second layers may include glycol-modified co(polyethylene terephthalate). The optical film has a shrinkage along a first direction of greater than 4% and a shrinkage along an orthogonal second direction of greater than 3% when heated at 150° C. for 15 minutes. A glass laminate is prepared by disposing the optical film between glass layers and laminating the optical film to the glass layers.

Optical film and glass laminate

An optical stack includes an optical film () and an optical adhesive () disposed on the optical film. The optical adhesive has a major structured surface facing away from the optical film that includes a plurality of channels formed therein. The channels define a plurality of substantially flat land regions therebetween. The land regions include at least about 50% of a total surface area of the major structured surface. When the optical stack is placed on a support surface with the major structured surface of the optical adhesive contacting the support surface, the optical stack bonds to the support surface and may be removed from, or slidingly repositioned on, the support surface without damage to the optical adhesive or the support surface, and upon application of at least one of heat and pressure, the optical stack substantially permanently bonds to the support surface and the plurality of channels substantially disappear.

Optical stack

A multilayer optical film includes a plurality of polymeric layers arranged sequentially adjacent to each other. A difference in thickness between spaced apart first and second polymeric layers in the plurality of polymeric layers is less than about 10%. Each polymeric layer that is disposed between the first and second polymeric layers has a thickness less than about 400 nm. Each layer in a group of at least three polymeric layers in the plurality of polymeric layers that are disposed between the first and second polymeric layers has a thickness greater than an average thickness of the first and second polymeric layers by about 20% to about 500%. The group of at least three polymeric layers includes at least one pair of immediately adjacent polymeric layers.

Multilayer optical film

Growing community of inventors

Woodbury, MN, United States of America

Matthew B Johnson