Patents by Inventor Shailesh N. Joshi
Shailesh N. Joshi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11754343Abstract: Embodiments of the disclosure relate to an electronic assembly including a substrate having a first surface and a second surface opposite to the first surface and one or more electronic devices bonded to the first surface of the substrate. A first heat-storing region is embedded within the substrate and proximate to the second surface. The first heat-storing region comprises a phase change material encapsulated by an encapsulating layer. A melting temperature of the encapsulating layer is higher than a melting temperature of the phase change material and a maximum operating temperature of the one or more electronic devices. A heat transfer layer is embedded within the substrate and thermally connects the first heat-storing region to the one or more electronic devices.Type: GrantFiled: November 5, 2019Date of Patent: September 12, 2023Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.Inventors: Shailesh N. Joshi, Ercan M. Dede
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Patent number: 11749632Abstract: A power electronics module includes a glass layer with one or more vias extending through the glass layer and having an electrically and thermally conductive material disposed within the one or more vias, a power electronic device directly bonded to a first surface of the glass layer, and, a cooling structure thermally coupled to a second surface of the glass layer.Type: GrantFiled: March 31, 2021Date of Patent: September 5, 2023Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.Inventors: Shailesh N. Joshi, Hiroshi Ukegawa
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Patent number: 11742267Abstract: Methods, apparatuses and systems provide for technology that includes a transistor assembly for a power electronics apparatus having a plurality of transistor pairs arranged in a common plane, where for each pair of transistors one transistor is flipped relative to the other transistor. The technology further includes a first lead frame arranged parallel to and electrically coupled to the first transistor in each transistor pair, a second lead frame coplanar to the first lead frame and arranged parallel to and electrically coupled to the second transistor in each transistor pair, and a plurality of output lead frames arranged coplanar to each other, where each respective output lead frame is arranged parallel to and electrically coupled to a respective one pair of the plurality of transistor pairs.Type: GrantFiled: October 12, 2020Date of Patent: August 29, 2023Assignee: Toyota Motor Engineering and Manufacturing North America, Inc.Inventors: Hitoshi Fujioka, Shailesh N. Joshi, Feng Zhou, Danny J. Lohan
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Publication number: 20230258962Abstract: A head mounted display apparatus includes a display unit having an optical member, one or more elastically deformable position adjustment members operable to flexibly mount the optical member, and one or more light sources. The optical member has a reflective surface to direct rendered visual content towards an eye of a user. The elastically deformable position adjustment member(s) are moveable between a contracted state and an expanded state to adjust a spatial orientation of the optical member in a manner that adjusts a spatial orientation of the rendered visual content relative to the eye of the user. The elastically deformable position adjustment member(s) has one or more photochromatic regions that are moveable in response to exposure to ultraviolet (UV) light emitted by the light sources.Type: ApplicationFiled: February 11, 2022Publication date: August 17, 2023Applicant: Toyota Motor Engineering & Manufacturing North America, IncInventors: Shailesh N Joshi, Ercan M Dede
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Patent number: 11726236Abstract: A method to form a three-dimensional photonic crystal template with a gradient structure involves irradiating a photoresist composition of a thickness of at least 15 ?m from at least four laser beams to yield a periodic patterned with a percolating matrix of mass in constructive volumes of a cured photoresist composition and destructive volumes of voids free of condensed matter where the proportion of constructive volume displays a gradient from the irradiated surface to the substrate after development. For a given light intensity, photoinitiator concentration in the photoresist composition, and a given thickness, by irradiating for a relatively short period, a three-dimensional photonic crystal template displaying a gradient having greater constructive volume proximal the air interface forms and a relatively long irradiation period results in a gradient having greater constructive volume proximal the substrate.Type: GrantFiled: August 5, 2021Date of Patent: August 15, 2023Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., The Board of Trustees of The University of IllinoisInventors: Shailesh N. Joshi, Gaurav Singhal, Paul Vannest Braun, Danny J. Lohan, Kai-Wei Lan
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Patent number: 11721608Abstract: A power electronics assembly includes a vapor chamber and a heat-generating device. The vapor chamber includes a housing defining an evaporator side and a condenser side and a pedestal integrally formed with an extending from the evaporator side, the pedestal comprising a non-rectangular shape corresponding to a thermal management objective. The heat-generating device is coupled to the pedestal.Type: GrantFiled: February 2, 2021Date of Patent: August 8, 2023Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.Inventors: Shailesh N. Joshi, Ercan Mehmet Dede
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Publication number: 20230241987Abstract: A dynamic wireless power transfer system can include a dynamic wireless power transfer transmission system and a dynamic wireless power transfer reception system. The dynamic wireless power transfer transmission system can include a signal receiver, an array of coils of conductors, an array of switches, and a controller. The dynamic wireless power transfer reception system can include a signal transmitter and an array of coils of conductors. The signal transmitter can be configured to transmit, to the signal receiver, a signal. The signal can include information indicative of a size of the array of coils of conductors of the dynamic wireless power transfer reception system. The array of switches can be configured to connect an alternating current source to the array of coils of conductors of the dynamic wireless power transfer transmission system. The controller can control, according to the information, positions of switches of the array of switches.Type: ApplicationFiled: January 28, 2022Publication date: August 3, 2023Inventors: Yanghe Liu, Shailesh N. Joshi
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Publication number: 20230244079Abstract: Systems, apparatus, computer implemented methods, and computer program products to enhance the operation of a vehicle. A HUD apparatus includes a laser light source to generate laser light to be reflected an optical member, one or more elastically deformable position adjustment members, and one or more UV light sources. The elastically deformable position adjustment members are operable to adjust a spatial orientation of the optical member, and include one or more photochromatic regions to facilitate movement of the one or more elastically deformable position adjustment members from a contracted state to an expanded state in response to exposure to UV light emitted by the U light source(s). In that way, adjustments in the spatial orientation of the optical member and a change in direction of laser light reflected by the optical member as obtained.Type: ApplicationFiled: January 28, 2022Publication date: August 3, 2023Applicant: Toyota Motor Engineering & Manufacturing North America, IncInventors: Shailesh N Joshi, Ercan M Dede
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Publication number: 20230243555Abstract: A passive thermal regulation system includes a substrate and a coating. The coating is positioned to encapsulate at least a portion of the substrate. The coating includes a first hydrogel layer and a second hydrogel layer. The first hydrogel layer has a plurality of carbon materials configured to absorb a solar radiation. The second hydrogel layer includes a hydrogel that is different from the first hydrogel layer. The coating, at a first temperature, causes the passive thermal regulation system to passively switch from a solar reflective state to solar absorber state to permit the plurality of carbon materials to absorb the solar radiation. At a second temperature, the coating causes the system to passively switch from the solar absorber state to the solar reflective state where the hydrogel of the second hydrogel layer inhibits the solar radiation from absorption. The second temperature is greater than the first temperature.Type: ApplicationFiled: January 31, 2022Publication date: August 3, 2023Applicants: Toyota Motor Engineering & Manufacturing North America, Inc., The Board of Trustees of the University of IllinoisInventors: Shailesh N. Joshi, Dajie Xie, Paul V. Braun
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Publication number: 20230244075Abstract: A light apparatus includes an optical member, composed of an elastically deformable material, having a reflective surface to reflect light. The optical member moveable between a first state in which the reflective surface has a first structural shape, and a plurality of second states in which the reflective surface has a second structural shape different than the first structural shape. Elastically deformable position adjustment members are operable to move the optical member between the first state and the plurality of second states. The elastically deformable position adjustment members have one or more photochromatic regions that are moveable in response to exposure to UV light. Light sources are operable to selectively emit illuminating UV light in a direction that contacts the one or more photochromatic regions to thereby adjust an orientation of the optical member in a manner which changes a direction of light reflected by the optical member.Type: ApplicationFiled: January 28, 2022Publication date: August 3, 2023Applicant: Toyota Motor Engineering & Manufacturing North America, IncInventors: Ercan M. Dede, Shailesh N. Joshi
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Patent number: 11703685Abstract: Systems, apparatus, computer implemented methods, and computer program products to enhance the operation of a vehicle. A HUD apparatus includes a laser light source to generate laser light to be reflected an optical member, one or more elastically deformable position adjustment members, and one or more UV light sources. The elastically deformable position adjustment members are operable to adjust a spatial orientation of the optical member, and include one or more photochromatic regions to facilitate movement of the one or more elastically deformable position adjustment members from a contracted state to an expanded state in response to exposure to UV light emitted by the U light source(s). In that way, adjustments in the spatial orientation of the optical member and a change in direction of laser light reflected by the optical member as obtained.Type: GrantFiled: January 28, 2022Date of Patent: July 18, 2023Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.Inventors: Shailesh N Joshi, Ercan M Dede
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Patent number: 11691718Abstract: An aerial vehicle includes a body and a wireless charging receiver pad connected to the body, whereby the aerial vehicle is configured to be wirelessly charged when parked above a wireless charging transmitter pad. The aerial vehicle includes landing gear connected to the body and extending underneath the body. The landing gear is configured for actuation to control the location of the receiver pad with respect to the transmitter pad.Type: GrantFiled: October 29, 2021Date of Patent: July 4, 2023Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.Inventors: Yanghe Liu, Shailesh N. Joshi
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Patent number: 11685543Abstract: A hybrid cooling system of an electric machine is contemplated. The hybrid cooling system comprises a propeller positioned on an exterior of an enclosure, at least one electronic component disposed within the enclosure, and a vapor chamber disposed within the enclosure, wherein the vapor chamber comprises an actuator configured to generate mist from a liquid coolant within the enclosure. In operation, in a first mode, the propeller rotates for generating air that is channeled into the enclosure via fins that are disposed on exterior portions of the enclosure, and in a second mode, the actuator generates mist within the vapor chamber, and the propeller rotates for generating air that is channeled into the enclosure via the fins disposed therein.Type: GrantFiled: March 24, 2022Date of Patent: June 27, 2023Assignee: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC.Inventors: Shailesh N. Joshi, Hiroshi Ukegawa
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Publication number: 20230192316Abstract: Systems, methods, and other embodiments described herein relate to charging a battery of an electric vehicle while the electric vehicle is hovering. In one embodiment, a method includes, responsive to determining that an electric vehicle does not include a receiver pad, inserting the receiver pad into the electric vehicle that is hovering in the air at a charging station. The method includes determining a space above a transmitter pad for the electric vehicle to hover based, at least in part, on a location and a size of the transmitter pad. The method includes charging a battery to a threshold value through the receiver pad.Type: ApplicationFiled: December 22, 2021Publication date: June 22, 2023Inventors: Shailesh N. Joshi, Yanghe Liu
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Publication number: 20230191743Abstract: A passive thermal management system and methods of using a thermoresponsive hydrogel coating configured to autonomously switch between a heating state and a cooling state based on ambient temperature. At temperature greater than a lower critical solution temperature of the thermoresponsive hydrogel, the thermoresponsive hydrogel coating becomes solar reflective and has enhanced radiative cooling ability to achieve daytime radiative cooling. At temperatures less than the lower critical solution temperature, the thermoresponsive hydrogel coating becomes transparent to facilitate absorption of solar radiation by sun absorber.Type: ApplicationFiled: December 17, 2021Publication date: June 22, 2023Applicants: Toyota Motor Engineering & Manufacturing North America, Inc, The Board of Trustees of the University of IllinoisInventors: Shailesh N. Joshi, Dajie Xie, Paul Braun
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Publication number: 20230185075Abstract: Systems and methods for adjusting one or more properties of a deformable lens are described herein. The deformable lens includes a photoswitch material that, when irradiated by a radiation, causes a curvature of a surface of the deformable lens to change from a first curvature to a second curvature based on the intensity of the radiation.Type: ApplicationFiled: December 14, 2021Publication date: June 15, 2023Inventors: Shailesh N. Joshi, Ercan Mehmet Dede
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Patent number: 11659697Abstract: Methods, apparatuses and systems to provide for technology to that includes a plurality of transistors including first transistors and second transistors. The first transistors are disposed opposite the second transistors in a lateral direction with a first space between the first transistors and the second transistors in the lateral direction. A gate driver is electrically connected to the plurality of transistors to operate the plurality of transistors. The gate driver has a first portion disposed between the first transistors and the second transistors in the first space.Type: GrantFiled: October 29, 2020Date of Patent: May 23, 2023Assignee: Toyota Motor Engineering and Manufacturing North America, Inc.Inventors: Hitoshi Fujioka, Shailesh N. Joshi, Feng Zhou, Danny J. Lohan
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Publication number: 20230150383Abstract: A panel for wireless charging of an electric vehicle includes a metamaterial panel with a first shape and a second shape different than the first shape. The metamaterial panel is configured to be positioned between a transmitter coil of a wireless power transfer station (WPTS) and a receiver coil of the electric vehicle during wireless charging of the electric vehicle and change between the first shape and the second shape as a function of at least one of a size of the transmitter coil, a size of the receiver coil, and a distance between the transmitter coil and the receiver coil. A robot with at least one of a robotic arm and a robotic buggy can be included and the metamaterial panel can be coupled to the robot. And the robot is configured to position the metamaterial panel between the transmitter coil of the WPTS and the receiver coil of the electric vehicle during wireless charging of the electric vehicle.Type: ApplicationFiled: November 15, 2021Publication date: May 18, 2023Inventors: Yanghe Liu, Shailesh N. Joshi
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Patent number: 11647612Abstract: An integrated power electronic assembly includes a power electronic device, a cooling assembly offset from and thermally coupled to a second edge of the power electronic device, and a thermal spreader offset from and thermally coupled to a first edge of the power electronic device. The first edge of the power electronic device is opposite the second edge of the power electronic device, and the thermal spreader is thermally coupled to the cooling assembly.Type: GrantFiled: February 1, 2021Date of Patent: May 9, 2023Assignee: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC.Inventors: Hitoshi Fujioka, Shailesh N. Joshi, Hiroshi Ukegawa
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Publication number: 20230138653Abstract: Evaporator assemblies, vapor chamber assemblies, and methods for fabricating a vapor chamber are disclosed. In one embodiment, an evaporator assembly for a vapor chamber includes an evaporator surface, an array of posts extending from the evaporator surface, and an array of vapor vents within the evaporator surface. Each vapor vent of the array of vapor vents is configured as a depression within the evaporator surface. The evaporator assembly further includes a porous layer disposed on the evaporator surface, the array of posts, and the array of vapor vents.Type: ApplicationFiled: November 3, 2021Publication date: May 4, 2023Applicant: Toyota Motor Engineering & Manufacturing North America, Inc.Inventors: Shailesh N. Joshi, Danny Lohan