3m Innovative Properties Company

Jingfei Chen

Bharat R Acharya

John Allen Wheatley

Gilles J Benoit

Huijie Xie

Zhe Hu

Fan Long

Guanglei Du

Yan Yan Zhang

Zhiping Liu

Timothy J Hebrink

Tao Zhang

Adam D Haag

Jaewon Kim

Feng Zhao

Quinn D Sanford

Matthew S Cole

Zhiyong Xu

Jiao Liu

Onur Sinan Yordem

Xue Mao

Gilles J B Benoit

Mingxing Wang

Yihang Lv

Shine Long

Hailiang Hou

Xiulong Men

Bo Guo

Yang Liu

Tuhua Chen

Yifei Zheng

A display system for imaging a user body portion includes a display panel, an optical sensor disposed on the display panel and configured to detect light reflected by the user body portion, and an optical stack disposed between the display panel and the optical sensor. The optical stack includes a first optical reflector and a light collimating film. The light collimating film includes a plurality of substantially coplanar alternating first and second regions. For an incident light, a visible wavelength range, and an infrared wavelength range, and for each of a first incident angle of less than about 5 degrees and a second incident angle of between about 40 degrees and about 70 degrees, the plurality of polymeric layers has an average optical reflectance of greater than about 70% in the visible wavelength range and an optical transmittance of greater than about 30% in the infrared wavelength range.

Large area infrared sensor film

An optical stack () includes an optical diffuser () and a first reflective polarizer () disposed on the optical diffuser (). For substantially normally incident light and for nonoverlapping first and second wavelength ranges, the optical diffuser () has a first scattering rate Rfor at least one wavelength in the first wavelength range, and a second scattering rate Rfor at least one wavelength in the second wavelength range, such that R/Ris greater than or equal to 2. The first reflective polarizer () may transmit at least 40% of light for a first polarization state for each wavelength in the first wavelength range, may reflect at least 70% of light for an orthogonal second polarization state for each wavelength in the first wavelength range, and transmit at least 40% of light for each of the first and second polarization states and for each wavelength in the second wavelength range.

Optical diffuser with high infrared clarity

An optical construction () includes a lightguide (), a transmissive reflector (), and an optical sensor (). The lightguide () includes a first major surface () and a second major surface () opposite to the first major surface (). The first major surface () includes a first portion () and an adjoining second portion (). The transmissive reflector () is disposed adjacent to the first major surface () of the lightguide (). The optical sensor () is disposed adjacent to the transmissive reflector () opposite to the lightguide (). The optical sensor () is aligned with the first portion () of the first major surface () of the lightguide (), such that the optical sensor () receives at least a portion of light passing through the first portion () of the first major surface () and transmitted by the transmissive reflector (). The optical construction () further includes an enclosed gap () disposed between the first portion () of the first major surface () of the lightguide () and the transmissive reflector ().

Optical construction

An optical stack () includes a substrate (), a radio-wave anti-reflection sheet () configured to reduce reflection from the optical stack () of radio waves at a predetermined operating frequency (f), and a visible light reflective, infrared light transmissive multilayer optical film () disposed between the radio-wave anti-reflection sheet () and the substrate (). For radiation substantially normally incident on the radio-wave anti-reflection sheet () and for a first frequency range at least 20 GHZ wide, centered on the predetermined operating frequency (f), and disposed between about 1 GHZ and about 120 GHZ, a return loss of the optical stack () is asymmetric about the predetermined operating frequency (f) in the first frequency range. The optical stack () has a largest return loss SL in the first frequency range of less than −10 dB and a difference between the largest return loss SL and a smallest return loss SS in the first frequency range is less than about 2 dB.

Optical stack including multilayer optical film and radio-wave anti-reflection sheet

An electronic device () includes a liquid crystal display (LCD) panel (), a cover layer (), one or more light sources (), and an optical sensor module (). The LCD panel () receives a contact input associated with a fingerprint of a user. The cover layer () includes a first major surface () and a second major surface () opposite to the first major surface (), and is disposed on the LCD panel (). The cover layer () defines a first axis (AA′) normal to the first major surface (). The optical sensor module () receives a light from the predetermined fingerprint sensing area () to detect the fingerprint. The optical sensor module () at least partially overlaps with the predetermined fingerprint sensing area () along the plane of the first major surface (). The optical sensor module () defines a second axis (BB′) normal to a surface of the optical sensor module (). The second axis (BB′) is inclined at an inclination angle relative to the first axis (AA′) of the cover layer ().

Electronic device with optical sensor module

An example article may include an optical filter and a multilayer stack adjacent the optical filter. The multilayer stack may include a plurality of layers. Each respective layer of the plurality layers may define a respective window edge of a plurality of window edges. The plurality of window edges may define an optical window configured to transmit light through the optical filter. At least a first respective window edge of the plurality of window edges may be stepped relative to at least a second respective window edge of the plurality of window edges.

Device optical window camouflage

Multi-layered solar cell devices covered with partially transmissive graphic films. The multi-layered solar cell devices include at least one solar cell, a graphics layer over the solar cell, and a reflective layer. The reflective layer can be behind the solar cell for recycling light or between the partially transmissive graphic film and the solar cell for improved appearance. The multi-layered solar cell devices have a high efficiency and a customizable appearance.

Multi-layered solar cell device

Growing community of inventors

Shanghai, China

Jingfei Chen