Patents by Inventor Alex Liang

Alex Liang 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).

  • Publication number: 20220308184
    Abstract: A lidar receiver that includes a photodetector circuit can be controlled so that the detection intervals used by the lidar receiver to detect returns from fired laser pulse shots are closely controlled. Such control over the detection intervals used by the lidar receiver allows for close coordination between a lidar transmitter and the lidar receiver where the lidar receiver is able to adapt to variable shot intervals of the lidar transmitter (including periods of high rate firing as well as periods of low rate firing).
    Type: Application
    Filed: September 30, 2021
    Publication date: September 29, 2022
    Inventors: Naveen Reddy, Allan Steinhardt, Luis Dussan, Joel Benscoter, Alex Liang, Philippe Feru, Igor Polishchuk
  • Publication number: 20220308221
    Abstract: A lidar receiver can employ multiple processors to distribute the workload of processing returns from laser pulse shots.
    Type: Application
    Filed: September 30, 2021
    Publication date: September 29, 2022
    Inventors: Naveen Reddy, Allan Steinhardt, Luis Dussan, Joel Benscoter, Alex Liang, Philippe Feru, Igor Polishchuk
  • Publication number: 20220308169
    Abstract: A lidar system that includes a laser source can be controlled to fire laser pulse shots from the laser source at a variable rate of firing those laser pulse shots. The fired laser pulse shots can include scheduled laser pulse shots that are targeted at range points in the field of view. The fired laser pulse shots can also include marker shots that bleed energy out of the laser source in order to avoid reaching a threshold for available energy in the laser source and/or regulate energy amounts for the targeted laser pulse shots. A laser energy model that models how much energy is available from the laser source for laser pulse shots over time can be used to model future available energies for the laser source and determine whether any marker shots should be fired.
    Type: Application
    Filed: September 23, 2021
    Publication date: September 29, 2022
    Inventors: Philippe Feru, Luis Dussan, Joel Benscoter, Alex Liang, Igor Polishchuk, Allan Steinhardt
  • Publication number: 20220308176
    Abstract: A lidar system that includes a laser source and transmits laser pulses produced by the laser source toward range points in a field of view can use a laser energy model to model the available energy in the laser source over time. The timing schedule for laser pulses fired by the lidar system can then be determined using energies that are predicted for the different scheduled laser pulse shots based on the laser energy model. This permits the lidar system to reliably ensure at a highly granular level that each laser pulse shot has sufficient energy to meet operational needs, including when operating during periods of high density/high resolution laser pulse firing. The laser energy model is capable of modeling the energy available for laser pulses in the laser source over very short time intervals (such as 10-100 nanoseconds).
    Type: Application
    Filed: September 23, 2021
    Publication date: September 29, 2022
    Inventors: Philippe Feru, Luis Dussan, Joel Benscoter, Alex Liang, Igor Polishchuk, Allan Steinhardt
  • Patent number: 11448734
    Abstract: A lidar system that includes a laser source and transmits laser pulses produced by the laser source toward range points in a field of view via a mirror that scans through a plurality of scan angles can use (1) a laser energy model to model the available energy in the laser source over time and (2) a mirror motion model to model motion of the mirror over time. Time slots for transmitting the targeted laser pulses can be identified using the mirror motion model, and a schedule for these pulses can be determined using energies predicted for the pulses at these time slots according to the laser energy model. Linking the model of mirror motion with the model of laser energy provides highly precise granularity when scheduling laser pulses targeted at specific range points in the field of view.
    Type: Grant
    Filed: September 23, 2021
    Date of Patent: September 20, 2022
    Assignee: AEYE, Inc.
    Inventors: Philippe Feru, Luis Dussan, Joel Benscoter, Alex Liang, Igor Polishchuk, Allan Steinhardt
  • Patent number: 11442152
    Abstract: A lidar system that includes a laser source and transmits laser pulses produced by the laser source toward range points in a field of view can use a laser energy model to model the available energy in the laser source over time. The timing schedule for laser pulses fired by the lidar system can then be determined using energies that are predicted for the different scheduled laser pulse shots based on the laser energy model. This permits the lidar system to reliably ensure at a highly granular level that each laser pulse shot has sufficient energy to meet operational needs, including when operating during periods of high density/high resolution laser pulse firing. The laser energy model is capable of modeling the energy available for laser pulses in the laser source over very short time intervals (such as 10-100 nanoseconds).
    Type: Grant
    Filed: September 23, 2021
    Date of Patent: September 13, 2022
    Assignee: AEYE, Inc.
    Inventors: Philippe Feru, Luis Dussan, Joel Benscoter, Alex Liang, Igor Polishchuk, Allan Steinhardt
  • Patent number: 11300667
    Abstract: A lidar system that includes a laser source and a scannable mirror can be controlled to maximize the firing of laser pulse shots per scan line of the scannable mirror. For example, a control circuit for the lidar system can (1) process a pool of range points to be targeted with a plurality of shots from the laser source, (2) schedule shots for a single scan of the mirror along the first axis in a given scan direction to target as many of the range points from the pool as permitted by a laser energy model as compared to a plurality of energy requirements relating to the shots, and (3) control a firing of the scheduled shots during the single scan of the mirror in the given scan direction so that the scheduled shots are fired into the field of view toward the targeted range points via the mirror.
    Type: Grant
    Filed: September 23, 2021
    Date of Patent: April 12, 2022
    Assignee: AEYE, INC.
    Inventors: Philippe Feru, Luis Dussan, Joel Benscoter, Alex Liang, Igor Polishchuk, Naveen Reddy, Allan Steinhardt