Patents by Inventor Pubudu Thilanka GALWADUGE

Pubudu Thilanka GALWADUGE 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).

  • Switchable light-collimating layer with reflector
    Patent number: 11719953
    Abstract: A method for collimating light using a film including elongated chambers of bistable electrophoretic fluids. The light-collimating films are suitable to control the amount and/or direction of light incident to a transmissive substrate. Such films may be integrated into devices, such as LCD displays, to provide a zone of privacy for a user viewing the LCD display. Because the light-collimating film is switchable, it allows a user to alter the collimation of the emitted light on demand. Because the films are bistable, they do not require additional power after they have been switched to a display state.
    Type: Grant
    Filed: March 23, 2022
    Date of Patent: August 8, 2023
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Xiaolong Zheng, Pubudu Thilanka Galwaduge, Craig Lin, Yih-Ming Kang, HongMei Zang, Hui Du
  • Driving waveforms for switchable light-collimating layer including bistable electrophoretic fluid
    Patent number: 11435606
    Abstract: Methods and controllers for driving a light-collimating film including elongated chambers of bistable electrophoretic fluids. The light-collimating films are suitable to control the amount and/or direction of light incident to a transmissive substrate. Such films may be integrated into devices, such as LCD displays, to provide a zone of privacy for a user viewing the LCD display. Because the light-collimating film is switchable, it allows a user to alter the collimation of the emitted light on demand. Because the films are bistable, they do not require additional power after they have been switched to a display state.
    Type: Grant
    Filed: August 9, 2019
    Date of Patent: September 6, 2022
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Pubudu Thilanka Galwaduge, Xiaolong Zheng, Craig Lin
  • SWITCHABLE LIGHT-COLLIMATING LAYER WITH REFLECTOR
    Publication number: 20220221731
    Abstract: A method for collimating light using a film including elongated chambers of bistable electrophoretic fluids. The light-collimating films are suitable to control the amount and/or direction of light incident to a transmissive substrate. Such films may be integrated into devices, such as LCD displays, to provide a zone of privacy for a user viewing the LCD display. Because the light-collimating film is switchable, it allows a user to alter the collimation of the emitted light on demand. Because the films are bistable, they do not require additional power after they have been switched to a display state.
    Type: Application
    Filed: March 23, 2022
    Publication date: July 14, 2022
    Inventors: Xiaolong ZHENG, Pubudu Thilanka Galwaduge, Craig Lin, Yih-Ming Kang, HongMei Zang, Hui Du
  • Switchable light-collimating layer with reflector
    Patent number: 11314098
    Abstract: A light-collimating film including elongated chambers of bistable electrophoretic fluids. The light-collimating films are suitable to control the amount and/or direction of light incident to a transmissive substrate. Such films may be integrated into devices, such as LCD displays, to provide a zone of privacy for a user viewing the LCD display. Because the light-collimating film is switchable, it allows a user to alter the collimation of the emitted light on demand. Because the films are bistable, they do not require additional power after they have been switched to a display state.
    Type: Grant
    Filed: August 9, 2019
    Date of Patent: April 26, 2022
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Xiaolong Zheng, Pubudu Thilanka Galwaduge, Craig Lin, Yih-Ming Kang, HongMei Zang, Hui Du
  • DRIVING WAVEFORMS FOR SWITCHABLE LIGHT-COLLIMATING LAYER INCLUDING BISTABLE ELECTROPHORETIC FLUID
    Publication number: 20200050033
    Abstract: Methods and controllers for driving a light-collimating film including elongated chambers of bistable electrophoretic fluids. The light-collimating films are suitable to control the amount and/or direction of light incident to a transmissive substrate. Such films may be integrated into devices, such as LCD displays, to provide a zone of privacy for a user viewing the LCD display. Because the light-collimating film is switchable, it allows a user to alter the collimation of the emitted light on demand. Because the films are bistable, they do not require additional power after they have been switched to a display state.
    Type: Application
    Filed: August 9, 2019
    Publication date: February 13, 2020
    Inventors: Pubudu Thilanka Galwaduge, Xiaolong Zheng, Craig Lin
  • SWITCHABLE LIGHT-COLLIMATING LAYER WITH REFLECTOR
    Publication number: 20200050010
    Abstract: A light-collimating film including elongated chambers of bistable electrophoretic fluids. The light-collimating films are suitable to control the amount and/or direction of light incident to a transmissive substrate. Such films may be integrated into devices, such as LCD displays, to provide a zone of privacy for a user viewing the LCD display. Because the light-collimating film is switchable, it allows a user to alter the collimation of the emitted light on demand. Because the films are bistable, they do not require additional power after they have been switched to a display state.
    Type: Application
    Filed: August 9, 2019
    Publication date: February 13, 2020
    Inventors: Xiaolong ZHENG, Pubudu Thilanka GALWADUGE, Craig LIN, Yih-Ming KANG, HongMei ZANG, Hui DU