Patents by Inventor Vipul Chawla
Vipul Chawla 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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Patent number: 11965989Abstract: Embodiments of the disclosure provide an optical sensing system and an optical sensing method thereof. The optical sensing system comprises a light source configured to emit an optical signal into an environment surrounding the optical sensing system. The optical sensing system further comprises a photodetector configured to receive the optical signal reflected from the environment of the optical sensing system, and convert the optical signal to an electrical signal, where the photodetector is disposed in a package. The optical sensing system additionally comprises a readout circuit configured to generate a readout signal based on the electrical signal received from the photodetector, where the readout circuit is disposed in the same package as the photodetector and connected to the photodetector through routings in the package.Type: GrantFiled: November 4, 2020Date of Patent: April 23, 2024Assignee: BEIJING VOYAGER TECHNOLOGY CO., LTD.Inventors: Yue Lu, Vipul Chawla, Youmin Wang
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Patent number: 11715930Abstract: A system for controlling a pulsed laser diode includes a power source configured to supply power to the pulsed laser diode and at least one driving branch between the power source and the pulsed laser diode. The at least one driving branch is configured to control power delivery from the power source to the pulsed laser diode. The at least one driving branch is connected to a cathode of the pulsed laser diode.Type: GrantFiled: November 3, 2020Date of Patent: August 1, 2023Assignee: BEIJING VOYAGER TECHNOLOGY CO., LTD.Inventors: Yibo Yu, Yue Lu, Vipul Chawla, Zhenghan Zhu, Lingkai Kong
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Patent number: 11506764Abstract: Method and system for performing ranging operation are provided. In one example, a transmitter is configured to transmit a first signal having a first signal level and a second signal having a second signal level, the second signal being transmitted after the first signal, the first signal and the second signal being separated by a time gap configured based on a minimum distance of a range of distances to be measured by the LiDAR module. The first signal level and the second signal level are configured based on the range of distances to be measured by the LiDAR module, a range of levels of reflectivity of a target object to be detected by the LiDAR module, and a dynamic range of a receiver circuit to receive the first signal and the second signal. Ranging operation can be performed based on the time-of-flight of at least one of the first signal or the second signal.Type: GrantFiled: December 26, 2018Date of Patent: November 22, 2022Assignee: Beijing Voyager Technology Co., Ltd.Inventors: Vipul Chawla, Yue Lu, Yibo Yu
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Publication number: 20220308188Abstract: Apparatus and methods for reducing inter symbol interference from reflected laser pulses that are received close in time. A laser is provided to emit a laser beam pulse. A photodetector is mounted to receive a reflected laser beam pulse after reflecting off an object in an external environment, and produce a voltage signal corresponding to the reflected laser beam pulse. The voltage signal is provided to a delay path circuit having a delay line and a gain control circuit to provide a delayed, reduced amplitude voltage signal. The delayed, reduced amplitude voltage signal is subtracted from the voltage signal in a subtraction circuit to produce a truncated pulse. The output of the subtraction circuit is provided to a pulse detector circuit to detect the arrival time of the leading edge of the truncated pulse.Type: ApplicationFiled: March 29, 2021Publication date: September 29, 2022Inventors: Yue Lu, Vipul Chawla, Youmin Wang
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Patent number: 11402477Abstract: Methods and apparatus for performing a ranging operation are provided. In one example, an apparatus comprises a transmitter circuit, a receiver circuit, a controller, and a code storage. The controller can obtain a first code from the code storage, determine, from the first code, first timing information and first amplitude information of a corresponding first group of one or more signals, and control the transmitter circuit to transmit the first group of one or more signals based on the first timing information and the first amplitude information. The controller can configure a matched filter based on the first timing information and the first amplitude information, identify return signals of the first group of one or more signals based on processing received signals using the configured matched filter, and perform a ranging operation based on the identified return signals and the first group of one or more signals.Type: GrantFiled: March 1, 2019Date of Patent: August 2, 2022Assignee: Beijing Voyager Technology Co., LtdInventors: Zhenghan Zhu, Yue Lu, Yibo Yu, Vipul Chawla, John K. Wu
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Publication number: 20220206115Abstract: In one example, an apparatus is provided. The apparatus is part of a Light Detection and Ranging (LiDAR) module and comprises a transmitter circuit, a receiver circuit, and a controller. The receiver circuit comprises a photodetector configured to convert a light signal into a photocurrent signal. The controller is configured to: transmit, using the transmitter circuit, a first light signal; receive, using the photodetector of the receiver circuit, a second light signal; determine whether the second light signal includes a scatter signal coupled from the transmitter circuit, and a reflected first light signal; and based on whether the second light signal includes the scatter signal and the reflected first light signal, determine a time-of-flight of the first light signal based on one of: a width of the second light signal, or a time difference between the transmission of the first light signal and the reception of the second light signal.Type: ApplicationFiled: December 29, 2020Publication date: June 30, 2022Inventors: Vipul Chawla, Lingkai Kong, Yue Lu, John K. Wu
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Publication number: 20220137191Abstract: Embodiments of the disclosure provide an optical sensing system and an optical sensing method thereof. The optical sensing system comprises a light source configured to emit an optical signal into an environment surrounding the optical sensing system. The optical sensing system further comprises a photodetector configured to receive the optical signal reflected from the environment of the optical sensing system, and convert the optical signal to an electrical signal, where the photodetector is disposed in a package. The optical sensing system additionally comprises a readout circuit configured to generate a readout signal based on the electrical signal received from the photodetector, where the readout circuit is disposed in the same package as the photodetector and connected to the photodetector through routings in the package.Type: ApplicationFiled: November 4, 2020Publication date: May 5, 2022Applicant: BEIJING VOYAGER TECHNOLOGY CO., LTD.Inventors: Yue Lu, Vipul Chawla, Youmin Wang
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Publication number: 20220120881Abstract: In one example, an apparatus is provided. The apparatus is part of a Light Detection and Ranging (LiDAR) module of a vehicle and comprises: a receiver circuit including a photodiode and an amplifier circuit; and a controller configured to: obtain information of an operation condition of the LiDAR module; based on the information, set a multiplication ratio by which the photodiode converts incident light to a photocurrent; obtain, from the amplifier circuit, an output signal based on the photocurrent; and perform a ranging operation based on the output signal.Type: ApplicationFiled: October 16, 2020Publication date: April 21, 2022Inventors: Yue Lu, Vipul Chawla, Youmin Wang
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Patent number: 11280888Abstract: An optical signal detection system includes a plurality of photodetectors configured to detect optical signals reflected from an environment surrounding the optical signal detection system and convert the optical signals into electrical signals. The optical signal detection system also includes an amplifier coupled to the plurality of photodetectors. The amplifier is shared by the plurality of photodetectors and configured to generate an output signal by amplifying an individual electrical signal converted by a corresponding photodetector. The optical signal detection system further includes a multiplexing circuit configured to selectively establish a connection between one of the plurality of photodetectors and the amplifier to amply the electrical signal converted by that photodetector.Type: GrantFiled: September 27, 2020Date of Patent: March 22, 2022Assignee: BEIJING VOYAGER TECHNOLOGY CO., LTD.Inventors: Vipul Chawla, Yue Lu, Lingkai Kong
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Publication number: 20220003851Abstract: Embodiments of the disclosure provide an optical sensing system, a method for controlling a receiver gain in the optical sensing system, and a receiver in the optical sensing system. The exemplary optical sensing system includes a transmitter configured to emit light beams at a plurality of vertical detection angles to scan an object. The optical sensing system further includes a receiver having a detector configured to detect the light beams returned by the object. The optical sensing system also includes a controller configured to dynamically vary a gain of the detector for detecting the light beams of the respective vertical detection angles.Type: ApplicationFiled: August 17, 2020Publication date: January 6, 2022Applicant: BEIJING VOYAGER TECHNOLOGY CO., LTD.Inventors: Yue LU, Vipul Chawla, Youmin Wang
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Patent number: 10936135Abstract: A touch sensor panel is disclosed. In some examples, the touch sensor panel comprises a first layer including a plurality of drive lines including drive electrodes, wherein the drive lines are configured to be coupled to drive circuitry during touch sensing on the touch sensor panel. In some examples, the first layer includes a plurality of sense lines including sense electrodes, wherein the sense lines are configured to be coupled to sense circuitry during the touch sensing on the touch sensor panel. In some examples, the first layer includes a plurality of first shielding electrodes, wherein the first shielding electrodes are disposed between the drive electrodes and the sense electrodes. In some examples, the touch sensor panel comprises a second layer, different than the first layer, including one or more bridges electrically coupling at least two of the first shielding electrodes together.Type: GrantFiled: July 1, 2019Date of Patent: March 2, 2021Assignee: Apple Inc.Inventors: Alexandre Gourevitch, Christophe Blondin, Ashray Vinayak Gogte, Xiaoqi Zhou, Vipul Chawla, Robert Leo Sheridan
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Publication number: 20210050708Abstract: A system for controlling a pulsed laser diode includes a power source configured to supply power to the pulsed laser diode and at least one driving branch between the power source and the pulsed laser diode. The at least one driving branch is configured to control power delivery from the power source to the pulsed laser diode. The at least one driving branch is connected to a cathode of the pulsed laser diode.Type: ApplicationFiled: November 3, 2020Publication date: February 18, 2021Applicant: BEIJING VOYAGER TECHNOLOGY CO., LTD.Inventors: Yibo Yu, Yue Lu, Vipul Chawla, Zhenghan Zhu, Lingkai Kong
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Publication number: 20210025991Abstract: An optical signal detection system includes a plurality of photodetectors configured to detect optical signals reflected from an environment surrounding the optical signal detection system and convert the optical signals into electrical signals. The optical signal detection system also includes an amplifier coupled to the plurality of photodetectors. The amplifier is shared by the plurality of photodetectors and configured to generate an output signal by amplifying an individual electrical signal converted by a corresponding photodetector. The optical signal detection system further includes a multiplexing circuit configured to selectively establish a connection between one of the plurality of photodetectors and the amplifier to amply the electrical signal converted by that photodetector.Type: ApplicationFiled: September 27, 2020Publication date: January 28, 2021Applicant: BEIJING VOYAGER TECHNOLOGY CO., LTD.Inventors: Vipul Chawla, Yue Lu, Lingkai Kong
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Patent number: 10830877Abstract: An optical signal detection system includes a plurality of photodetectors configured to detect optical signals reflected from an environment surrounding the optical signal detection system and convert the optical signals into electrical signals. The optical signal detection system also includes an amplifier coupled to the plurality of photodetectors. The amplifier is shared by the plurality of photodetectors and configured to generate an output signal by amplifying an individual electrical signal converted by a corresponding photodetector. The optical signal detection system further includes a multiplexing circuit configured to selectively establish a connection between one of the plurality of photodetectors and the amplifier to amply the electrical signal converted by that photodetector.Type: GrantFiled: July 3, 2020Date of Patent: November 10, 2020Assignee: BEIJING VOYAGER TECHNOLOGY CO., LTD.Inventors: Vipul Chawla, Yue Lu, Lingkai Kong
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Patent number: 10826269Abstract: A system for controlling a pulsed laser diode includes a power source configured to supply power to the pulsed laser diode and at least one driving branch between the power source and the pulsed laser diode. The at least one driving branch is configured to control power delivery from the power source to the pulsed laser diode. The at least one driving branch is connected to a cathode of the pulsed laser diode.Type: GrantFiled: April 6, 2019Date of Patent: November 3, 2020Assignee: BEIJING VOYAGER TECHNOLOGY CO., LTD.Inventors: Yibo Yu, Yue Lu, Vipul Chawla, Zhenghan Zhu, Lingkai Kong
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Publication number: 20200278430Abstract: Methods and apparatus for performing a ranging operation are provided. In one example, an apparatus comprises a transmitter circuit, a receiver circuit, a controller, and a code storage. The controller can obtain a first code from the code storage, determine, from the first code, first timing information and first amplitude information of a corresponding first group of one or more signals, and control the transmitter circuit to transmit the first group of one or more signals based on the first timing information and the first amplitude information. The controller can configure a matched filter based on the first timing information and the first amplitude information, identify return signals of the first group of one or more signals based on processing received signals using the configured matched filter, and perform a ranging operation based on the identified return signals and the first group of one or more signals.Type: ApplicationFiled: March 1, 2019Publication date: September 3, 2020Inventors: Zhenghan Zhu, Yue Lu, Yibo Yu, Vipul Chawla, John K. Wu
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Publication number: 20200209362Abstract: Method and system for performing ranging operation are provided. In one example, a transmitter is configured to transmit a first signal having a first signal level and a second signal having a second signal level, the second signal being transmitted after the first signal, the first signal and the second signal being separated by a time gap configured based on a minimum distance of a range of distances to be measured by the LiDAR module. The first signal level and the second signal level are configured based on the range of distances to be measured by the LiDAR module, a range of levels of reflectivity of a target object to be detected by the LiDAR module, and a dynamic range of a receiver circuit to receive the first signal and the second signal. Ranging operation can be performed based on the time-of-flight of at least one of the first signal or the second signal.Type: ApplicationFiled: December 26, 2018Publication date: July 2, 2020Inventors: Vipul Chawla, Yue Lu, Yibo Yu
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Publication number: 20200203923Abstract: A system for controlling a pulsed laser diode includes a power source configured to supply power to the pulsed laser diode and at least one driving branch between the power source and the pulsed laser diode. The at least one driving branch is configured to control power delivery from the power source to the pulsed laser diode. The at least one driving branch is connected to a cathode of the pulsed laser diode.Type: ApplicationFiled: April 6, 2019Publication date: June 25, 2020Applicant: DiDi Research America, LLCInventors: Yibo Yu, Yue Lu, Vipul Chawla, Zhenghan Zhu, Lingkai Kong
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Publication number: 20200026393Abstract: A touch sensor panel is disclosed. In some examples, the touch sensor panel comprises a first layer including a plurality of drive lines including drive electrodes, wherein the drive lines are configured to be coupled to drive circuitry during touch sensing on the touch sensor panel. In some examples, the first layer includes a plurality of sense lines including sense electrodes, wherein the sense lines are configured to be coupled to sense circuitry during the touch sensing on the touch sensor panel. In some examples, the first layer includes a plurality of first shielding electrodes, wherein the first shielding electrodes are disposed between the drive electrodes and the sense electrodes. In some examples, the touch sensor panel comprises a second layer, different than the first layer, including one or more bridges electrically coupling at least two of the first shielding electrodes together.Type: ApplicationFiled: July 1, 2019Publication date: January 23, 2020Inventors: Alexandre GOUREVITCH, Christophe BLONDIN, Ashray Vinayak GOGTE, Xiaoqi ZHOU, Vipul CHAWLA, Robert Leo SHERIDAN
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Patent number: 10033338Abstract: Certain aspects of the present disclosure generally relate to an amplifier configured to process signals received in different frequency bands, where at least a portion of the amplifier is shared between different modes corresponding to the different frequency bands. One example circuit generally includes an amplifier having at least one first transistor configured to amplify a first signal received in a first mode of operation (e.g., associated with a particular frequency band), and at least one second transistor configured to amplify a second signal received in a second mode of operation. The amplifier may also include a transformer comprising a primary winding and a secondary winding, and one or more switches configured to selectively couple the primary winding to the first transistor or the second transistor based on the first mode or the second mode of operation, respectively. In certain aspects, the transformer may be coupled to a transconductance circuit.Type: GrantFiled: June 17, 2016Date of Patent: July 24, 2018Assignee: QUALCOMM IncorporatedInventors: Konstantin Trotskovsky, Vipul Chawla