3m Innovative Properties Company

Zhe Hu

Huijie Xie

Jingfei Chen

Bharat R Acharya

Fan Long

Zhiping Liu

John Allen Wheatley

Gilles J Benoit

Carl A Stover

Tao Zhang

Adam D Haag

Robert D Taylor

Jaewon Kim

Feng Zhao

Matthew S Cole

Quinn D Sanford

Lin Zhao

Bradley L Givot

Xue Mao

Mingxing Wang

Yan Yan Zhang

Shine Long

Hailiang Hou

Xiulong Men

Yang Liu

Tuhua Chen

Yifei Zheng

Jing Fei Chen

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

A housing () for an electronic device () includes an optical film () having an optical transmittance for substantially normally incident light having a band edge separating first and second wavelength ranges, where the first wavelength range extends from about 400 nm to about 700 nm and the second wavelength range is at least about 100 nm wide and disposed between about 800 nm and about 1100 nm. For substantially normally incident light, an average optical reflectance of the optical film is greater than about 90% in the first wavelength range, and an average optical transmittance of the optical film is greater than about 80% in the second wavelength range. For at least one frequency in a range of about 0.1 GHz to about 90 GHz and for substantially normally incident radiation, the optical film transmits at least about 95% of the incident radiation.

Optical stack and housing for electronic device

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

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Suzhou, China

Zhe Hu