Patents by Inventor Chen Ji

Chen Ji 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: 12626118
    Abstract: The present invention discloses a two-dimensional photonic convolutional acceleration system and device for convolutional neural network, comprising: a multi-wavelength light source, a signal source to be convolved, a modulator, a dispersion module, a 1×M power divider, an optical fiber delay array, a microring weighting array chip, a convolutional kernel matrix control unit, a trans-impedance amplifier array, and an acquisition and processing unit. The present invention realizes two-dimensional convolutional acceleration based on wavelength-time interleaving technology, a single modulator can realize the optical domain loading of the signal, and the convolutional operation speed is only limited to the speed of the modulator.
    Type: Grant
    Filed: March 4, 2023
    Date of Patent: May 12, 2026
    Assignee: ZHEJIANG LAB
    Inventors: Qingshui Guo, Kun Yin, Chen Ji
  • Patent number: 12608087
    Abstract: Collaborative sessions in which access to a collaborative object and added virtual content is selectively provided to participants/users. In one example of the collaborative session, a participant crops media content by use of a hand gesture to produce an image segment that can be associated to the collaborative object. The hand gesture resembles a pair of scissors and the camera and processor of the client device track a path of the hand gesture to identify an object within a displayed image to create virtual content of the identified object. The virtual content created by the hand gesture is then associated to the collaborative object.
    Type: Grant
    Filed: July 31, 2024
    Date of Patent: April 21, 2026
    Assignee: Snap Inc.
    Inventors: Youjean Cho, Chen Ji, Fannie Liu, Andrés Monroy-Hernández, Tsung-Yu Tsai, Rajan Vaish
  • Publication number: 20260064866
    Abstract: Collaborative sessions in which access to added virtual content is selectively made available to participants/users. A participant (the host) creates a new session and invites participants to join. The invited participants receive an invitation to join the session. The session creator (i.e., the host) and other approved participants can access the contents of a session. The session identifies a new participant when they join the session, and concurrently notifies the other participants in the session that a new participant is waiting for permission to access the added virtual content. The host or approved participants can set up the new participant with permissions for accessing added virtual content.
    Type: Application
    Filed: November 11, 2025
    Publication date: March 5, 2026
    Inventors: Youjean Cho, Chen Ji, Fannie Liu, Andrés Monroy-Hernández, Tsung-Yu Tsai, Rajan Vaish
  • Publication number: 20260037653
    Abstract: Collaborative sessions in which access to added virtual content is selectively made available to participants/users by a collaborative system. The system receives a request from a user to join a session, and associates a timestamp with the user corresponding to receipt of the request. Users can edit the collaborative object if the timestamp is within the collaborative duration period and can view the collaborative object if the timestamp is after the collaborative duration period.
    Type: Application
    Filed: October 13, 2025
    Publication date: February 5, 2026
    Inventors: Youjean Cho, Chen Ji, Fannie Liu, Andrés Monroy-Hernández, Tsung-Yu Tsai, Rajan Vaish
  • Patent number: 12505239
    Abstract: Collaborative sessions in which access to added virtual content is selectively made available to participants/users. A participant (the host) creates a new session and invites participants to join. The invited participants receive an invitation to join the session. The session creator (i.e., the host) and other approved participants can access the contents of a session. The session identifies a new participant when they join the session, and concurrently notifies the other participants in the session that a new participant is waiting for permission to access the added virtual content. The host or approved participants can set up the new participant with permissions for accessing added virtual content.
    Type: Grant
    Filed: August 31, 2022
    Date of Patent: December 23, 2025
    Assignee: Snap Inc.
    Inventors: Youjean Cho, Chen Ji, Fannie Liu, Andrés Monroy-Hernández, Tsung-Yu Tsai, Rajan Vaish
  • Patent number: 12493705
    Abstract: Collaborative sessions in which access to added virtual content is selectively made available to participants/users by a collaborative system. The system receives a request from a user to join a session, and associates a timestamp with the user corresponding to receipt of the request. Users can edit the collaborative object if the timestamp is within the collaborative duration period and can view the collaborative object if the timestamp is after the collaborative duration period.
    Type: Grant
    Filed: August 31, 2022
    Date of Patent: December 9, 2025
    Assignee: Snap Inc.
    Inventors: Youjean Cho, Chen Ji, Fannie Liu, Andrés Monroy-Hernández, Tsung-Yu Tsai, Rajan Vaish
  • Publication number: 20250307370
    Abstract: A collaborative session (e.g., a virtual time capsule) in which access to a collaborative object and added virtual content is selectively provided to participants/users. In one example of the collaborative session, authentication of the collaborative object is performed by all of the users to complete the collaborative session. Each user authenticates the collaborative object, such as using a stamping gesture on a user interface of a client device or in an augmented reality session. User specific data is recorded with the stamping gesture to authenticate the collaborative object and the associated virtual content. In an example, user specific data may include device information, participant profile information, or biometric signal information. Biometric signal information, such as a fingerprint from a mobile device or a heart rate received from a connected smart device can be used to provide an authenticating signature to the seal.
    Type: Application
    Filed: June 11, 2025
    Publication date: October 2, 2025
    Inventors: Youjean Cho, Chen Ji, Fannie Liu, Andrés Monroy-Hernández, Tsung-Yu Tsai, Rajan Vaish
  • Patent number: 12411208
    Abstract: Discloses a coherent microwave photonics radar detection method and system based on injection locking frequency multiplication. The method uses a baseband signal to modulate an optical carrier to generate a modulated optical signal including a plurality of high-order sidebands; the modulated optical signal is divided into two paths which are respectively injected into two slave lasers for high-order sideband injection locking to obtain two locked sideband optical signals; Based on combining and splitting two locked sideband optical signals, the radar transmitting signal and receiving optical signal can be obtained through photo-detection and electro-optic modulation. After coherent detection of receiving optical signal, obtaining the intermediate frequency signal, and detection target information can be extracted from intermediate frequency signal by radar algorithm.
    Type: Grant
    Filed: December 26, 2022
    Date of Patent: September 9, 2025
    Assignee: ZHEJIANG LAB
    Inventors: Qingshui Guo, Kun Yin, Chen Ji, Jihou Wang, Xiaojun Ying
  • Patent number: 12361106
    Abstract: A collaborative session (e.g., a virtual time capsule) in which access to a collaborative object and added virtual content is selectively provided to participants/users. In one example of the collaborative session, authentication of the collaborative object is performed by all of the users to complete the collaborative session. Each user authenticates the collaborative object, such as using a stamping gesture on a user interface of a client device or in an augmented reality session. User specific data is recorded with the stamping gesture to authenticate the collaborative object and the associated virtual content. In an example, user specific data may include device information, participant profile information, or biometric signal information. Biometric signal information, such as a fingerprint from a mobile device or a heart rate received from a connected smart device can be used to provide an authenticating signature to the seal.
    Type: Grant
    Filed: August 31, 2022
    Date of Patent: July 15, 2025
    Assignee: Snap Inc.
    Inventors: Youjean Cho, Chen Ji, Fannie Liu, Andrés Monroy-Hernández, Tsung-Yu Tsai, Rajan Vaish
  • Publication number: 20250200201
    Abstract: Collaborative sessions in which access to added virtual content is selectively made available to participants/users. A participant (the host) creates a new session and invites participants to join. The invited participants receive an invitation to join the session. The session creator (i.e., the host) and other approved participants can access the contents of a session. The session identifies a new participant when they join the session, and concurrently notifies the other participants in the session that a new participant is waiting for permission to access the added virtual content. The host or approved participants can set up the new participant with permissions for accessing added virtual content.
    Type: Application
    Filed: March 3, 2025
    Publication date: June 19, 2025
    Inventors: Youjean Cho, Chen Ji, Fannie Liu, Andrés Monroy-Hernández, Tsung-Yu Tsai, Rajan Vaish
  • Patent number: 12299150
    Abstract: Collaborative sessions in which access to added virtual content is selectively made available to participants/users. A participant (the host) creates a new session and invites participants to join. The invited participants receive an invitation to join the session. The session creator (i.e., the host) and other approved participants can access the contents of a session. The session identifies a new participant when they join the session, and concurrently notifies the other participants in the session that a new participant is waiting for permission to access the added virtual content. The host or approved participants can set up the new participant with permissions for accessing added virtual content.
    Type: Grant
    Filed: August 31, 2022
    Date of Patent: May 13, 2025
    Assignee: Snap Inc.
    Inventors: Youjean Cho, Chen Ji, Fannie Liu, Andrés Monroy-Hernández, Tsung-Yu Tsai, Rajan Vaish
  • Publication number: 20240393885
    Abstract: Collaborative sessions in which access to a collaborative object and added virtual content is selectively provided to participants/users. In one example of the collaborative session, a participant crops media content by use of a hand gesture to produce an image segment that can be associated to the collaborative object. The hand gesture resembles a pair of scissors and the camera and processor of the client device track a path of the hand gesture to identify an object within a displayed image to create virtual content of the identified object. The virtual content created by the hand gesture is then associated to the collaborative object.
    Type: Application
    Filed: July 31, 2024
    Publication date: November 28, 2024
    Inventors: Youjean Cho, Chen Ji, Fannie Liu, Andrés Monroy-Hernández, Tsung-Yu Tsai, Rajan Vaish
  • Patent number: 12148114
    Abstract: A collaborative session (e.g., a virtual time capsule) in which access to a collaborative object with an associated material and added virtual content is provided to users. In one example of the collaborative session, a user selects the associated material of the collaborative object. Physical characteristics are assigned to the collaborative object as a function of the associated material to be perceived by the participants when the collaborative object is manipulated. In one example, the material associated to the collaborative object is metal, wherein the interaction between the users and the collaborative object generates a response of the collaborative object that is indicative of the physical properties of metal, such as inertial, acoustic, and malleability.
    Type: Grant
    Filed: August 31, 2022
    Date of Patent: November 19, 2024
    Assignee: Snap Inc.
    Inventors: Youjean Cho, Chen Ji, Fannie Liu, Andrés Monroy-Hernández, Tsung-Yu Tsai, Rajan Vaish
  • Publication number: 20240320353
    Abstract: A collaborative session (e.g., a virtual time capsule) in which access to a collaborative object and added virtual content is selectively provided to participants/users. In one example of the collaborative session, a participant (the host) creates a new session and invites participants to join. The session creator (i.e., the host) and other approved participants can access the contents of a session (e.g., which may be recorded using an application such as lens cloud feature; available from Snap Inc. of Santa Monica, California). A timestamp is associated with each received virtual content, and the users are provided with a timelapse of the collaborative object as a function of the timestamps.
    Type: Application
    Filed: May 31, 2024
    Publication date: September 26, 2024
    Inventors: Youjean Cho, Chen Ji, Fannie Liu, Andrés Monroy-Hernández, Tsung-Yu Tsai, Rajan Vaish
  • Patent number: 12079395
    Abstract: Collaborative sessions in which access to a collaborative object and added virtual content is selectively provided to participants/users. In one example of the collaborative session, a participant crops media content by use of a hand gesture to produce an image segment that can be associated to the collaborative object. The hand gesture resembles a pair of scissors and the camera and processor of the client device track a path of the hand gesture to identify an object within a displayed image to create virtual content of the identified object. The virtual content created by the hand gesture is then associated to the collaborative object.
    Type: Grant
    Filed: August 31, 2022
    Date of Patent: September 3, 2024
    Assignee: Snap Inc.
    Inventors: Youjean Cho, Chen Ji, Fannie Liu, Andrés Monroy-Hernández, Tsung-Yu Tsai, Rajan Vaish
  • Publication number: 20240231920
    Abstract: A system may include a memory and a processor in communication with the memory. The processor may be configured to perform operations. The operations may include receiving a task request from a user and determining a preferred executor type for the task request. The operations may include selecting an executor of the preferred executor type for the task request. The operations may include performing the task request with the executor and returning a response to the task request to the user.
    Type: Application
    Filed: January 5, 2023
    Publication date: July 11, 2024
    Inventors: Peng Hui Jiang, Fan Jing Meng, Guang Han Sui, Jun Su, Li Jian Wang, Chen Ji
  • Patent number: 12019773
    Abstract: A collaborative session (e.g., a virtual time capsule) in which access to a collaborative object and added virtual content is selectively provided to participants/users. In one example of the collaborative session, a participant (the host) creates a new session and invites participants to join. The session creator (i.e., the host) and other approved participants can access the contents of a session (e.g., which may be recorded using an application such as lens cloud feature; available from Snap Inc. of Santa Monica, California). A timestamp is associated with each received virtual content, and the users are provided with a timelapse of the collaborative object as a function of the timestamps.
    Type: Grant
    Filed: August 31, 2022
    Date of Patent: June 25, 2024
    Assignee: Snap Inc.
    Inventors: Youjean Cho, Chen Ji, Fannie Liu, Andrés Monroy-Hernández, Tsung-Yu Tsai, Rajan Vaish
  • Publication number: 20240078421
    Abstract: The present invention discloses a two-dimensional photonic convolutional acceleration system and device for convolutional neural network, comprising: a multi-wavelength light source, a signal source to be convolved, a modulator, a dispersion module, a 1×M power divider, an optical fiber delay array, a microring weighting array chip, a convolutional kernel matrix control unit, a trans-impedance amplifier array, and an acquisition and processing unit. The present invention realizes two-dimensional convolutional acceleration based on wavelength-time interleaving technology, a single modulator can realize the optical domain loading of the signal, and the convolutional operation speed is only limited to the speed of the modulator.
    Type: Application
    Filed: March 4, 2023
    Publication date: March 7, 2024
    Inventors: QINGSHUI GUO, KUN YIN, CHEN JI
  • Publication number: 20240070302
    Abstract: Collaborative sessions in which access to added virtual content is selectively made available to participants/users. A participant (the host) creates a new session and invites participants to join. The invited participants receive an invitation to join the session. The session creator (i.e., the host) and other approved participants can access the contents of a session. The session identifies a new participant when they join the session, and concurrently notifies the other participants in the session that a new participant is waiting for permission to access the added virtual content. The host or approved participants can set up the new participant with permissions for accessing added virtual content.
    Type: Application
    Filed: August 31, 2022
    Publication date: February 29, 2024
    Inventors: Youjean Cho, Chen Ji, Fannie Liu, Andrés Monroy-Hernández, Tsung-Yu Tsai, Rajan Vaish
  • Publication number: 20240070301
    Abstract: A collaborative session (e.g., a virtual time capsule) in which access to a collaborative object and added virtual content is selectively provided to participants/users. In one example of the collaborative session, a participant (the host) creates a new session and invites participants to join. The session creator (i.e., the host) and other approved participants can access the contents of a session (e.g., which may be recorded using an application such as lens cloud feature; available from Snap Inc. of Santa Monica, California). A timestamp is associated with each received virtual content, and the users are provided with a timelapse of the collaborative object as a function of the timestamps.
    Type: Application
    Filed: August 31, 2022
    Publication date: February 29, 2024
    Inventors: Youjean Cho, Chen Ji, Fannie Liu, Andrés Monroy-Hernández, Tsung-Yu Tsai, Rajan Vaish