Patents by Inventor Wenjun Qiu
Wenjun Qiu 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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Publication number: 20190339522Abstract: Transparent displays enable many useful applications, including heads-up displays for cars and aircraft as well as displays on eyeglasses and glass windows. Unfortunately, transparent displays made of organic light-emitting diodes are typically expensive and opaque. Heads-up displays often require fixed light sources and have limited viewing angles. And transparent displays that use frequency conversion are typically energy inefficient. Conversely, the present transparent displays operate by scattering visible light from resonant nanoparticles with narrowband scattering cross sections and small absorption cross sections. More specifically, projecting an image onto a transparent screen doped with nanoparticles that selectively scatter light at the image wavelength(s) yields an image on the screen visible to an observer. Because the nanoparticles scatter light at only certain wavelengths, the screen is practically transparent under ambient light.Type: ApplicationFiled: March 26, 2018Publication date: November 7, 2019Inventors: Chia Wei Hsu, Wenjun Qiu, Bo Zhen, Ofer Shapira, Marin Soljacic
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Patent number: 10025123Abstract: The various technologies presented herein relate to various hybrid phononic-photonic waveguide structures that can exhibit nonlinear behavior associated with traveling-wave forward stimulated Brillouin scattering (forward-SBS). The various structures can simultaneously guide photons and phonons in a suspended membrane. By utilizing a suspended membrane, a substrate pathway can be eliminated for loss of phonons that suppresses SBS in conventional silicon-on-insulator (SOI) waveguides. Consequently, forward-SBS nonlinear susceptibilities are achievable at about 3000 times greater than achievable with a conventional waveguide system. Owing to the strong phonon-photon coupling achievable with the various embodiments, potential application for the various embodiments presented herein cover a range of radiofrequency (RF) and photonic signal processing applications. Further, the various embodiments presented herein are applicable to applications operating over a wide bandwidth, e.g. 100 MHz to 50 GHz or more.Type: GrantFiled: December 15, 2015Date of Patent: July 17, 2018Assignees: National Technology & Engineering Solutions of Sandia, LLCInventors: Peter Thomas Rakich, Heedeuk Shin, Ryan Camacho, Jonathan Albert Cox, Robert L. Jarecki, Jr., Wenjun Qiu, Zheng Wang
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Patent number: 9927616Abstract: Transparent displays enable many useful applications, including heads-up displays for cars and aircraft as well as displays on eyeglasses and glass windows. Unfortunately, transparent displays made of organic light-emitting diodes are typically expensive and opaque. Heads-up displays often require fixed light sources and have limited viewing angles. And transparent displays that use frequency conversion are typically energy inefficient. Conversely, the present transparent displays operate by scattering visible light from resonant nanoparticles with narrowband scattering cross sections and small absorption cross sections. More specifically, projecting an image onto a transparent screen doped with nanoparticles that selectively scatter light at the image wavelength(s) yields an image on the screen visible to an observer. Because the nanoparticles scatter light at only certain wavelengths, the screen is practically transparent under ambient light.Type: GrantFiled: August 16, 2016Date of Patent: March 27, 2018Assignee: Massachusetts Institute of TechnologyInventors: Chia Wei Hsu, Wenjun Qiu, Bo Zhen, Ofer Shapira, Marin Soljacic
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Publication number: 20170184849Abstract: Transparent displays enable many useful applications, including heads-up displays for cars and aircraft as well as displays on eyeglasses and glass windows. Unfortunately, transparent displays made of organic light-emitting diodes are typically expensive and opaque. Heads-up displays often require fixed light sources and have limited viewing angles. And transparent displays that use frequency conversion are typically energy inefficient. Conversely, the present transparent displays operate by scattering visible light from resonant nanoparticles with narrowband scattering cross sections and small absorption cross sections. More specifically, projecting an image onto a transparent screen doped with nanoparticles that selectively scatter light at the image wavelength(s) yields an image on the screen visible to an observer. Because the nanoparticles scatter light at only certain wavelengths, the screen is practically transparent under ambient light.Type: ApplicationFiled: August 16, 2016Publication date: June 29, 2017Inventors: Chia Wei Hsu, Wenjun Qiu, Bo Zhen, Ofer Shapira, Marin Soljacic
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Patent number: 9677741Abstract: Transparent displays enable many useful applications, including heads-up displays for cars and aircraft as well as displays on eyeglasses and glass windows. Unfortunately, transparent displays made of organic light-emitting diodes are typically expensive and opaque. Heads-up displays often require fixed light sources and have limited viewing angles. And transparent displays that use frequency conversion are typically energy inefficient. Conversely, the present transparent displays operate by scattering visible light from resonant nanoparticles with narrowband scattering cross sections and small absorption cross sections. More specifically, projecting an image onto a transparent screen doped with nanoparticles that selectively scatter light at the image wavelength(s) yields an image on the screen visible to an observer. Because the nanoparticles scatter light at only certain wavelengths, the screen is practically transparent under ambient light.Type: GrantFiled: April 4, 2016Date of Patent: June 13, 2017Assignee: MASSACHUSETTS INSTITUTE OF TECHNOLOGYInventors: Chia Wei Hsu, Wenjun Qiu, Bo Zhen, Ofer Shapira, Marin Soljacic
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Patent number: 9458989Abstract: Disclosed herein are transparent color displays with nanoparticles made with nonlinear materials and/or designed to exhibit optical resonances. These nanoparticles are embedded in or hosted on a transparent substrate, such as a flexible piece of clear plastic or acrylic. Illuminating the nanoparticles with invisible light (e.g., infrared or ultraviolet light) causes them to emit visible light. For example, a rare-earth doped nanoparticle may emit visible light when illuminated simultaneoulsy with a first infrared beam at a first wavelength ?1 and a second infrared beam at a second wavelength ?2. And a frequency-doubling nanoparticle may emit visible light when illuminated with a single infrared beam at the nanoparticle's resonant frequency. Selectively addressing these nanoparticles with appropiately selected pump beams yields visible light emitted from the nanoparticles hosted by the transparent substrate in a desired pattern.Type: GrantFiled: December 30, 2013Date of Patent: October 4, 2016Assignee: Massachusetts Institute of TechnologyInventors: Chia Wei Hsu, Wenjun Qiu, Bo Zhen, Ofer Shapira, Marin Soljacic
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Publication number: 20160216600Abstract: Transparent displays enable many useful applications, including heads-up displays for cars and aircraft as well as displays on eyeglasses and glass windows. Unfortunately, transparent displays made of organic light-emitting diodes are typically expensive and opaque. Heads-up displays often require fixed light sources and have limited viewing angles. And transparent displays that use frequency conversion are typically energy inefficient. Conversely, the present transparent displays operate by scattering visible light from resonant nanoparticles with narrowband scattering cross sections and small absorption cross sections. More specifically, projecting an image onto a transparent screen doped with nanoparticles that selectively scatter light at the image wavelength(s) yields an image on the screen visible to an observer. Because the nanoparticles scatter light at only certain wavelengths, the screen is practically transparent under ambient light.Type: ApplicationFiled: April 4, 2016Publication date: July 28, 2016Inventors: Chia Wei Hsu, Wenjun Qiu, Bo Zhen, Ofer Shapira, Marin Soljacic
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Patent number: 9335027Abstract: Transparent displays enable many useful applications, including heads-up displays for cars and aircraft as well as displays on eyeglasses and glass windows. Unfortunately, transparent displays made of organic light-emitting diodes are typically expensive and opaque. Heads-up displays often require fixed light sources and have limited viewing angles. And transparent displays that use frequency conversion are typically energy inefficient. Conversely, the present transparent displays operate by scattering visible light from resonant nanoparticles with narrowband scattering cross sections and small absorption cross sections. More specifically, projecting an image onto a transparent screen doped with nanoparticles that selectively scatter light at the image wavelength(s) yields an image on the screen visible to an observer. Because the nanoparticles scatter light at only certain wavelengths, the screen is practically transparent under ambient light.Type: GrantFiled: October 30, 2013Date of Patent: May 10, 2016Assignee: Massachusetts Institute of TechnologyInventors: Chia Wei Hsu, Wenjun Qiu, Bo Zhen, Ofer Shapira, Marin Soljacic
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Patent number: 9268092Abstract: The various technologies presented herein relate to various hybrid phononic-photonic waveguide structures that can exhibit nonlinear behavior associated with traveling-wave forward stimulated Brillouin scattering (forward-SBS). The various structures can simultaneously guide photons and phonons in a suspended membrane. By utilizing a suspended membrane, a substrate pathway can be eliminated for loss of phonons that suppresses SBS in conventional silicon-on-insulator (SOI) waveguides. Consequently, forward-SBS nonlinear susceptibilities are achievable at about 3000 times greater than achievable with a conventional waveguide system. Owing to the strong phonon-photon coupling achievable with the various embodiments, potential application for the various embodiments presented herein cover a range of radiofrequency (RF) and photonic signal processing applications. Further, the various embodiments presented herein are applicable to applications operating over a wide bandwidth, e.g. 100 MHz to 50 GHz or more.Type: GrantFiled: October 16, 2013Date of Patent: February 23, 2016Assignee: Sandia CorporationInventors: Robert L. Jarecki, Jr., Peter Thomas Rakich, Ryan Camacho, Heedeuk Shin, Jonathan Albert Cox, Wenjun Qiu, Zheng Wang
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Publication number: 20140185282Abstract: Transparent displays enable many useful applications, including heads-up displays for cars and aircraft as well as displays on eyeglasses and glass windows. Unfortunately, transparent displays made of organic light-emitting diodes are typically expensive and opaque. Heads-up displays often require fixed light sources and have limited viewing angles. And transparent displays that use frequency conversion are typically energy inefficient. Conversely, the present transparent displays operate by scattering visible light from resonant nanoparticles with narrowband scattering cross sections and small absorption cross sections. More specifically, projecting an image onto a transparent screen doped with nanoparticles that selectively scatter light at the image wavelength(s) yields an image on the screen visible to an observer. Because the nanoparticles scatter light at only certain wavelengths, the screen is practically transparent under ambient light.Type: ApplicationFiled: October 30, 2013Publication date: July 3, 2014Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGYInventors: CHIA WEI HSU, WENJUN QIU, BO ZHEN, OFER SHAPIRA, MARIN SOLJACIC
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Publication number: 20140185284Abstract: Disclosed herein are transparent color displays with nanoparticles made with nonlinear materials and/or designed to exhibit optical resonances. These nanoparticles are embedded in or hosted on a transparent substrate, such as a flexible piece of clear plastic or acrylic. Illuminating the nanoparticles with invisible light (e.g., infrared or ultraviolet light) causes them to emit visible light. For example, a rare-earth doped nanoparticle may emit visible light when illuminated simultaneoulsy with a first infrared beam at a first wavelength ?1 and a second infrared beam at a second wavelength ?2. And a frequency-doubling nanoparticle may emit visible light when illuminated with a single infrared beam at the nanoparticle's resonant frequency. Selectively addressing these nanoparticles with appropiately selected pump beams yields visible light emitted from the nanoparticles hosted by the transparent substrate in a desired pattern.Type: ApplicationFiled: December 30, 2013Publication date: July 3, 2014Inventors: CHIA WEI HSU, WENJUN QIU, BO ZHEN, OFER SHAPIRA, MARIN SOLJACIC
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Publication number: 20090006177Abstract: Techniques are disclosed, among other things, that provide ads to requesting applications while the client device is not connected to a communication network. An offline advertisement engine is provided for storing business rules for each of a plurality of corresponding stored advertisements, wherein the business rules and advertisements are stored locally on the client device. An offline advertisement media manager is also provided for storing creatives related to the stored advertisements, wherein the creatives are also stored locally on the client device. Moreover, an advertisement center client is disclosed for providing advertisements and creatives associated with the advertisement to an application in response to a request for the advertisements.Type: ApplicationFiled: June 28, 2007Publication date: January 1, 2009Applicant: MICROSOFT CORPORATIONInventors: John A. BEAVER, Brian E. TSCHUMPER, Prasanth PULAVARTHI, Wenjun QIU
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Patent number: 6377960Abstract: An improved registration datastore comprises a datastore containing the database coupled to a data table object structure to present the data to a registration system in the form of an abstract table of data. The use of a data table structure between the registration system and the datastore provides storage location and format independence as the data table object presents the registration data to a calling object in the form of a data level table, a collection of configuration data items. The improved registration system permits one or more objects to be simultaneously installed into the registration database by different sources. The new registration system utilizes a database versioning and aging mechanism to permit multiple calling objects to operate using a version of the database known to be valid when its operations began.Type: GrantFiled: July 26, 1999Date of Patent: April 23, 2002Assignee: Microsoft CorporationInventors: Wenjun Qiu, Jason L. Zander, Markus Horstmann, William D. Devlin