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).

  • Patent number: 9927616
    Abstract: 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: Grant
    Filed: August 16, 2016
    Date of Patent: March 27, 2018
    Assignee: Massachusetts Institute of Technology
    Inventors: Chia Wei Hsu, Wenjun Qiu, Bo Zhen, Ofer Shapira, Marin Soljacic
  • Publication number: 20170184849
    Abstract: 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: Application
    Filed: August 16, 2016
    Publication date: June 29, 2017
    Inventors: Chia Wei Hsu, Wenjun Qiu, Bo Zhen, Ofer Shapira, Marin Soljacic
  • Patent number: 9677741
    Abstract: 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: Grant
    Filed: April 4, 2016
    Date of Patent: June 13, 2017
    Assignee: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    Inventors: Chia Wei Hsu, Wenjun Qiu, Bo Zhen, Ofer Shapira, Marin Soljacic
  • Patent number: 9458989
    Abstract: 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: Grant
    Filed: December 30, 2013
    Date of Patent: October 4, 2016
    Assignee: Massachusetts Institute of Technology
    Inventors: Chia Wei Hsu, Wenjun Qiu, Bo Zhen, Ofer Shapira, Marin Soljacic
  • Publication number: 20160216600
    Abstract: 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: Application
    Filed: April 4, 2016
    Publication date: July 28, 2016
    Inventors: Chia Wei Hsu, Wenjun Qiu, Bo Zhen, Ofer Shapira, Marin Soljacic
  • Patent number: 9335027
    Abstract: 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: Grant
    Filed: October 30, 2013
    Date of Patent: May 10, 2016
    Assignee: Massachusetts Institute of Technology
    Inventors: Chia Wei Hsu, Wenjun Qiu, Bo Zhen, Ofer Shapira, Marin Soljacic
  • Patent number: 9268092
    Abstract: 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: Grant
    Filed: October 16, 2013
    Date of Patent: February 23, 2016
    Assignee: Sandia Corporation
    Inventors: Robert L. Jarecki, Jr., Peter Thomas Rakich, Ryan Camacho, Heedeuk Shin, Jonathan Albert Cox, Wenjun Qiu, Zheng Wang
  • Publication number: 20140185282
    Abstract: 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: Application
    Filed: October 30, 2013
    Publication date: July 3, 2014
    Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    Inventors: CHIA WEI HSU, WENJUN QIU, BO ZHEN, OFER SHAPIRA, MARIN SOLJACIC
  • Publication number: 20140185284
    Abstract: 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: Application
    Filed: December 30, 2013
    Publication date: July 3, 2014
    Inventors: CHIA WEI HSU, WENJUN QIU, BO ZHEN, OFER SHAPIRA, MARIN SOLJACIC
  • Publication number: 20090006177
    Abstract: 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: Application
    Filed: June 28, 2007
    Publication date: January 1, 2009
    Applicant: MICROSOFT CORPORATION
    Inventors: John A. BEAVER, Brian E. TSCHUMPER, Prasanth PULAVARTHI, Wenjun QIU
  • Patent number: 6377960
    Abstract: 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: Grant
    Filed: July 26, 1999
    Date of Patent: April 23, 2002
    Assignee: Microsoft Corporation
    Inventors: Wenjun Qiu, Jason L. Zander, Markus Horstmann, William D. Devlin