Toyota Motor Engineering & Manufacturing North America, Inc.

Toyota Jidosha Kabushiki Kaisha

Toyota Motor Corporation

University of Michigan

Massachusetts Institute of Technology

The Trustees of Boston College

University of Illinois

University of Arizona

Viavi Solutions Inc.

Vivai Solutions Inc.

Toyota Manufacturing Engineering & Manufacturing North America, Inc.

Toyota Motor Entineering & Manufactirung North America Inc.

Debasish Banerjee

Songtao Wu

Minjuan Zhang

Masahiko Ishii

Kyu-Tae Lee

Xiaoshi Su

Chengang Ji

Ercan Mehmet Dede

Gaohua Zhu

Benjamin Alan Grayson

Hidetaka Asano

Khoa Vo

Michael Paul Rowe

Hideo Iizuka

Naohide Uchida

Takeshi Yamakawa

Li Qin Zhou

Takuji Kita

Jaewook Lee

Shailesh N Joshi

Hongfei Jia

Lingjie Jay Guo

Chi-Ming Wang

Swetha Minupuri

Mayu Takagi

Zhifeng Ren

Robert E Cohen

Torin C Peck

Tenghua Shieh

Michael F Rubner

Krishna R Gunugunuri

Michael Jones

Kazuhisa Yano

Tomohiro Miwa

Katsuhiko Nakajima

Evan B Fleming

Yuji Shintaku

Charles R Rutledge

Mindy Zhang

Reimi Emoto

Yusuke Suzuki

Alberto Argoitia

Ercan Mehment Dede

Chen Ling

Paul Thomas Kohlmann

Hiroki Nishijima

Taizo Masuda

Ying Zhang

Ruigang Zhang

Satoko Tofukuji

Kan Huang

Junya Murai

Yuki Kudo

Cynthia Gazepis Templeman

Takayoshi Tanaka

Pierre A Deymier

Frederick W Mau, Ii

Takeo Yamaguchi

Kai Aizawa

Jing Y Lao

Steven R Sorenson

David Gerard Cahill

Ryuta Sugiura

Yasushi Hirata

Tom Shieh

Mizuki Sakamoto

Zhiqian Chen

Shashi Honnikoppa

Yumi Kato

Qiye Zheng

Nichlas Z Swinteck

Masahiko Ishil

Pinar Kurt

Grinia Michelle Nogueira

Sung Ho Jo

Disclosed here are a method of marking a dark-colored surface with a dark-colored LiDAR-reflective material and a marking composition comprising the dark-colored LiDAR-reflective material and a marking carrier. Particularly, the dark-colored LiDAR-reflective material comprises has a reflectivity in the visible spectrum of electromagnetic radiation that is ≤10% and a reflectivity in the near-IR and LiDAR spectrum of electromagnetic radiation that is ≥10%.

Lidar reflective material and marking system

Systems and devices are disclosed herein for absorbing unwanted target sounds. In one example, an acoustic scatterer for absorbing a target sound includes a housing defining a plurality of channels having an open end and a terminal end. The terminal ends of the plurality of channels are separate from each other and extend along a length of the housing. The acoustic scatterer also includes one or more spacers subdividing the plurality of channels along the length of the housing. In another example, a system for absorbing a target sound includes a plurality of acoustic scatterers, each having a housing that defines a plurality of channels having an open end and a terminal end. The terminal ends of the plurality of channels are separate from each other and extend along a length of the housing. The plurality of acoustic scatterers are stacked on top of each other in a lengthwise direction.

Elongated sound isolation devices and systems

A multilayer thin film that reflects an omnidirectional structural color includes a multilayer stack comprising having: a reflector layer; a first dielectric layer extending over the reflector layer; an absorbing layer extending over the first dielectric layer; and a second dielectric layer extending over the absorbing layer. The multilayer thin film reflects a single narrow band of visible light when exposed to broadband electromagnetic radiation, and the single narrow band of visible light has: a visible full width at half maximum (FWHM) width of less than 200 nm; a color shift of the reflected single narrow band of visible light is less than 50 nm when the multilayer stack is exposed to broadband electromagnetic radiation and viewed from angles between 0 and 45 degrees relative to a direction normal to an outer surface of the multilayer thin film.

Non-color shifting multilayer structures

A five-layer thin film structure including a reflector, a high refractive index layer on or encapsulating the reflector, and a metallic iron absorber layer on or encapsulating the high refractive index layer. The reflector has a thickness from 10 nm to 5000 nm, the high refractive index layer has a thickness from 5 nm to 500 nm; and the metallic iron absorber layer has a thickness from greater than 0 nm to 50 nm.

Five-layer thin film structures comprising a metallic iron absorber

A composite material having a black pigment and a textile material. The composite material has a reflectivity toward near infrared electromagnetic radiation having a wavelength from 800 nm to 2500 nm of greater than or equal to 12%, and the composite material has a reflectivity toward visible light having a wavelength from 350 nm to 750 nm of less than or equal to 10%.

LiDAR reflective fabric

A discrete metallic particle having a metallic material, and a coating covering at least a portion of the metallic component. The discrete metallic particle has a thickness from 50 nm to 1000 nm, and the discrete metallic particle has a skin depth δ of greater than or equal to 1.0 μm in a frequency range from 20-40 GHz. The skin depth δ is calculated by: Where δ is skin depth in meters (m); ρ is resistivity in ohm meter (Ω·m); f is frequency of an electromagnetic radiation in hertz (Hz); μis permeability; and μis relative permeability of the metallic material.

Coated discrete metallic particles and multilayer structures comprising reflective core layers

A flexural wave absorption system may include a pair of resonators disposed on the structure and separated from each other by a separation distance. The pair of resonators are arranged on the structure in a direction substantially similar to the direction of the flexural wave acting on the structure. As to the separation distance, this distance may be approximately one-quarter of the wavelength of the flexural wave acting on the structure.

Flexural wave absorption system

A multilayer thin film structure having a reflective core particle, a dielectric layer directly encapsulating the reflective core particle, an absorber layer directly encapsulating the dielectric layer; an outer layer encapsulating the absorber layer. The multilayer thin film structure has a hue shift of less than 30° in the Lab color space when viewed at angles from 0° to 45°.

Nanoencapsulation methods for forming multilayer thin film structures and multilayer thin films formed therefrom

A method for beaming sound waves includes introducing sound waves into a phononic crystal in a first direction. The phononic crystal has an array of C-shaped structures oriented so that a neck of each of the C-shaped structures is facing the same general direction. The sound waves are beamed in the direction in which the neck of each of the C-shaped structures is facing so that the sound waves are beamed from the phononic crystal in a second direction that is different from the first direction.

Beaming sound waves using phononic crystals

A thermal management system to cool one or more battery packs of a battery system may include a heat pipe arrangement that includes a plurality of heat pipes, having a planar configuration, in thermal contact with the one or more battery packs to draw heat therefrom, and a heat sink arrangement that includes a plurality of heat sinks, in thermal contact with two or more edges of the heat pipe arrangement, to dissipate heat away from the heat pipe arrangement.

Battery thermal management with large area planar heat pipes

A sound absorbing structure includes a panel having a first side and a second side and at least one acoustic scatterer coupled to a first side of the panel. The panel may be at least partially transparent. The at least one acoustic scatterer has an opening and at least one channel. The at least one channel has a channel open end and a channel terminal end with the channel open end being in fluid communication with the opening. The panel may be utilized to separate an interior space from an exterior space.

Sound absorbing structure having one or more acoustic scatterers attached to a transparent panel

A copper oxide coated pigment including a particle having an outer surface, and a layer of copper oxide on the outer surface. The pigment has a reflectivity of electromagnetic radiation in a visible spectrum less than or equal to 5%, and a reflectivity of electromagnetic radiation in a near-IR and LiDAR spectrum greater than or equal to 5%. The particle is cobalt oxide or carbon black. A method for forming copper oxide coated particles includes combining a precipitating agent with a solution of copper nitrate and particles, forming coated particles. The particles are cobalt oxide or carbon black. Washing the particles, obtaining washed coated particles, and filtering the washed coated particles, obtaining filtered coated particles. Drying the filtered coated particles, obtaining dried coated particles, and calcining the dried coated particles to form the copper oxide coated particles.

Near infrared reflective copper oxide coated particles

A multi-layered material is provided for shielding low-frequency electromagnetic waves. The multi-layered material may include a plurality of repeating sets of alternating layers of materials. Each repeating set of alternating layers may include an electrically conductive layer and a magnetic layer including a continuous layer of a magnetic material. The multi-layered material is generally configured to shield electromagnetic waves having a frequency of less than about 1 MHz. In various aspects, the electrically conductive layer may include a conductive metal layer, or a two-dimensional transitional metal carbide. The multi-layered material may be provided as a thin film, or can be shaped or sized as flakes for use with a resin composite that is deposited via a spray application technique.

Multi-layer electomagnetic shielding composite

Black titanium dioxide has a crystalline titanium dioxide core and an amorphous titanium dioxide shell that encompasses the crystalline titanium dioxide core. The black titanium dioxide has a reflectivity of electromagnetic radiation in the visible spectrum that is less than or equal to 15% and a reflectivity for near-IR and LiDAR electromagnetic radiation that is greater than or equal to 10%. The black titanium dioxide has a band gap from greater than or equal to 1.0 eV to less than or equal to 2.0 eV.

Black titanium dioxide LiDAR reflecting particles and vehicles comprising the same

A high-chroma omnidirectional structural color multilayer structure is provided. The structure includes a multilayer stack that has a core layer, a dielectric layer extending across the core layer, and an absorber layer extending across the dielectric layer. An interface is present between the dielectric layer and the absorber layer and a near-zero electric field for a first incident electromagnetic wavelength is present at this interface. In addition, a large electric field at a second incident electromagnetic wavelength is present at the interface. As such, the interface allows for high transmission of the first incident electromagnetic wavelength and high absorption of the second incident electromagnetic wavelength such that a narrow band of reflected light is produced by the multilayer stack.

Omnidirectional structural color made from metal and dielectric layers

Growing community of inventors

Ann Arbor, MI, United States of America

Debasish Banerjee