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1.发明申请公开(公告)号：US20210271072A1
公开(公告)日：2021-09-02
申请号：US16804424
申请日：2020-02-28
Applicant: Infineon Technologies AG
Inventor： Richard SCHROEDTER , Han Woong YOO , David BRUNNER , Georg SCHITTER , Franz Michael DARRER , Marcus Edward HENNECKE
Abstract: An oscillator system includes an electrostatic oscillator structure configured to oscillate about an axis based on a deflection that varies over time; an actuator configured to drive the electrostatic oscillator structure about the axis, the actuator including a first capacitive element having a first capacitance dependent on the deflection and a second capacitive element having a second capacitance dependent on the deflection; a sensing circuit configured to receive a first displacement current from the first capacitive element and a second displacement current from the second capacitive element, to integrate the first displacement current to generate a first capacitive charge value, and to integrate the second displacement current to generate a second capacitive charge value; and a measurement circuit configured to receive the first and the second capacitive charge values and to measure the deflection of the electrostatic oscillator structure based on the first and the second capacitive charge values.
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公开(公告)号：US20200150246A1
公开(公告)日：2020-05-14
申请号：US16679748
申请日：2019-11-11
Applicant: Infineon Technologies AG
Inventor： Thomas THURNER , David BRUNNER , Marcus Edward HENNECKE , Georg SCHITTER , Han Woong YOO
Abstract: A light detection and ranging (LIDAR) sensor includes a first reflective surface configured to oscillate about a first rotation axis to deflect a light beam into an environment; and a second reflective surface configured to oscillate about a second rotation axis to guide light received from the environment onto a photodetector of the LIDAR sensor. The first rotation axis and the second rotation axis extend parallel to one another. The LIDAR sensor also includes a control circuit configured to drive the first reflective surface to oscillate with a first maximum deflection angle about the first rotation axis, and to drive the second reflective surface to oscillate with a second maximum deflection angle about the second rotation axis, the first maximum deflection angle being greater than the second maximum deflection angle, and an area of the first reflective surface is less than an area of the second reflective surface.
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公开(公告)号：US20250110330A1
公开(公告)日：2025-04-03
申请号：US18980107
申请日：2024-12-13
Applicant: Infineon Technologies AG
Inventor： Han Woong YOO , Stephan Gerhard ALBERT , David BRUNNER , Norbert DRUML , Selma KARIC , Leonhard NIEDERMUELLER , Georg SCHITTER , Richard SCHROEDTER
Abstract: A method of Lissajous scanning includes driving a first oscillator structure about a first rotation axis at a first resonance frequency according to a first driving signal, and driving a second oscillator structure about a second rotation axis at a second resonance frequency according to second driving signal different from the first resonance frequency. The first driving signal has a first low level, a first high level, and a first duty cycle, the combination of which produces the first resonance frequency, and the second driving signal has a second low level, a second high level, and a second duty cycle, the combination of which produces the second resonance frequency. At least one of the second low level, the second high level, and the second duty cycle is different from the first low level, the first high level, and the first duty cycle, respectively.
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公开(公告)号：US20210011134A1
公开(公告)日：2021-01-14
申请号：US16909098
申请日：2020-06-23
Applicant: Infineon Technologies AG
Inventor： David BRUNNER , Georg SCHITTER , Han Woong YOO
Abstract: A system includes a power driver, configured to generate an electric excitation; an oscillating system, configured to perform an oscillation induced by the electric excitation; a feedback detector, configured to detect a feedback measurement signal with to the oscillation; and a controller configured to operate: in a closed loop mode, to control the power driver to generate the electric excitation as a discontinuous electric excitation according to timing information obtained from the detected feedback measurement signal, to synchronize the discontinuous electric excitation with the detected feedback measurement signal; in a learning mode preceding the closed loop mode, to control the power driver to generate the electric excitation as a continuous electric excitation, to obtain timing information from the feedback measurement signal to be used, at least once, in the subsequent closed loop mode, to synchronize the discontinuous electric excitation with the detected feedback measurement signal.
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Patent Agency Ranking
5.发明申请公开(公告)号：US20220334377A1
公开(公告)日：2022-10-20
申请号：US17851297
申请日：2022-06-28
Applicant: Infineon Technologies AG
Inventor： Richard SCHROEDTER , Han Woong YOO , David BRUNNER , Georg SCHITTER , Franz Michael DARRER , Marcus Edward HENNECKE
Abstract: An oscillator system includes an electrostatic oscillator structure configured to oscillate about an axis based on a deflection that varies over time; an actuator configured to drive the electrostatic oscillator structure about the axis, the actuator including a first capacitive element having a first capacitance dependent on the deflection and a second capacitive element having a second capacitance dependent on the deflection; a sensing circuit configured to receive a first displacement current from the first capacitive element and a second displacement current from the second capacitive element, to integrate the first displacement current to generate a first capacitive charge value, and to integrate the second displacement current to generate a second capacitive charge value; and a measurement circuit configured to receive the first and the second capacitive charge values and to measure the deflection of the electrostatic oscillator structure based on the first and the second capacitive charge values.
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公开(公告)号：US20210344302A1
公开(公告)日：2021-11-04
申请号：US16861647
申请日：2020-04-29
Applicant: Infineon Technologies AG
Inventor： David BRUNNER , Georg SCHITTER , Richard SCHROEDTER , Han Woong YOO
IPC: H03B5/30
Abstract: An oscillator system includes a first oscillator structure configured to oscillate about a first rotation axis at a first oscillation frequency; a second oscillator structure configured to oscillate about a second rotation axis at a second oscillation frequency; a driver circuit configured to generate a first driving signal to drive an oscillation of the first oscillator structure with a first oscillation phase and the first oscillation frequency and generate a second driving signal to drive an oscillation of the second oscillator structure with a second oscillation phase and the second oscillation frequency. The first oscillation frequency and the second oscillation frequency have a variable frequency ratio with respect to each other that varies over time. The driver circuit is configured to modulate at least one of the first oscillation phase or the second oscillation phase to modulate the variable frequency ratio.
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公开(公告)号：US20210223536A1
公开(公告)日：2021-07-22
申请号：US16749270
申请日：2020-01-22
Applicant: Infineon Technologies AG
Inventor： David BRUNNER , Franz Michael DARRER , Georg SCHITTER
Abstract: An oscillator control system includes an non-linear oscillator structure configured to oscillate about an axis; a driver circuit configured to generate a driving signal to drive the oscillator structure; a detection circuit configured to measure an angle amplitude and a phase error of the oscillator structure; an amplitude controller configured to generate a reference oscillator period based on the measured angle amplitude; a period and phase controller configured to receive the reference oscillator period and the measured phase error from the detection circuit, generate at least one control parameter of the driving signal based on the reference oscillator period and the measured phase error, and determine a driving period of the driving signal based on the reference oscillator period and the measured phase error. The driver circuit is configured to generate the driving signal based on the at least one control parameter and the driving period.
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公开(公告)号：US20220317439A1
公开(公告)日：2022-10-06
申请号：US17220149
申请日：2021-04-01
Applicant: Infineon Technologies AG
Inventor： Han Woong YOO , Stephan Gerhard ALBERT , David BRUNNER , Norbert DRUML , Selma KARIC , Leonhard NIEDERMUELLER , Georg SCHITTER , Richard SCHROEDTER
Abstract: A method of Lissajous scanning includes driving a first oscillator structure about a first rotation axis at a first resonance frequency according to a first driving signal, and driving a second oscillator structure about a second rotation axis at a second resonance frequency according to second driving signal different from the first resonance frequency. The first driving signal has a first low level, a first high level, and a first duty cycle, the combination of which produces the first resonance frequency, and the second driving signal has a second low level, a second high level, and a second duty cycle, the combination of which produces the second resonance frequency. At least one of the second low level, the second high level, and the second duty cycle is different from the first low level, the first high level, and the first duty cycle, respectively.
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公开(公告)号：US20220187590A1
公开(公告)日：2022-06-16
申请号：US17122300
申请日：2020-12-15
Applicant: Infineon Technologies AG
Inventor： David BRUNNER , Stephan Gerhard ALBERT , Franz Michael DARRER , Georg SCHITTER , Richard SCHROEDTER , Han Woong YOO
Abstract: A scanning system includes a microelectromechanical system (MEMS) scanning structure configured with a desired rotational mode of movement based on a driving signal; a plurality of comb-drives configured to drive the MEMS scanning structure according to the desired rotational mode of movement based on the driving signal, each comb-drive including a rotor comb electrode and a stator comb electrode that form a capacitive element that has a capacitance that depends on the deflection angle of the MEMS scanning structure; a driver configured to generate the at least one driving signal; a sensing circuit selectively coupled to at least a subset of the plurality of comb-drives for receiving sensing signals therefrom, wherein each sensing signal is representative of the capacitance of a corresponding comb-drive; and a processing circuit configured to determine a scanning direction of the MEMS scanning structure in the desired rotational mode of movement based on the sensing signals.
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