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公开(公告)号：US11042026B2
公开(公告)日：2021-06-22
申请号：US15903569
申请日：2018-02-23
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Stephen John Fedigan , David Patrick Magee
Abstract: In described examples, a transducer vibrates a lens element at a first frequency and a different second frequency. Controller circuitry selects one of a cleaning mode and a heating mode in response to an estimated temperature of the lens element. The controller circuitry activates the transducer to vibrate the lens element at the first frequency in response to the controller circuitry selecting the cleaning mode. The controller circuitry activates the transducer to vibrate the lens element at the second frequency in response to the controller circuitry selecting the heating mode.
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公开(公告)号：US20210157130A1
公开(公告)日：2021-05-27
申请号：US17165895
申请日：2021-02-02
Applicant: Texas Instruments Incorporated
Abstract: An apparatus includes a mass detection circuit coupled to a surface covered with a plurality of electrodes. The mass detection circuit is configured to detect a mass of a first droplet present on the surface. The apparatus further includes a transducer circuit coupled to a transducer, which is coupled to the surface and form a lens unit. The transducer circuit configured to excite a first vibration of the surface at a resonant frequency to form a high displacement region on the surface. The apparatus also includes a voltage excitation circuit coupled to the plurality of electrodes. In response to the detection of the mass of the first droplet, the voltage excitation circuit is configured to apply a sequence of differential voltages on one or more consecutive electrodes which moves the first droplet to the high displacement region.
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公开(公告)号：US10908414B2
公开(公告)日：2021-02-02
申请号：US15591311
申请日：2017-05-10
Applicant: TEXAS INSTRUMENTS INCORPORATED
Abstract: An apparatus includes a mass detection circuit coupled to a surface covered with a plurality of electrodes. The mass detection circuit is configured to detect a mass of a first droplet present on the surface. The apparatus further includes a transducer circuit coupled to a transducer, which is coupled to the surface and form a lens unit. The transducer circuit configured to excite a first vibration of the surface at a resonant frequency to form a high displacement region on the surface. The apparatus also includes a voltage excitation circuit coupled to the plurality of electrodes. In response to the detection of the mass of the first droplet, the voltage excitation circuit is configured to apply a sequence of differential voltages on one or more consecutive electrodes which moves the first droplet to the high displacement region.
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公开(公告)号：US20200324324A1
公开(公告)日：2020-10-15
申请号：US16915704
申请日：2020-06-29
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： David Patrick Magee , Stephen John Fedigan
IPC: B08B7/02 , G01N29/036 , H01L41/04 , G01N29/02 , B60S1/56 , G01K13/00 , G01N29/34 , G01R31/34 , H01L41/09
Abstract: In a method of expelling contaminants from a sensor, a change is measured in a resonant frequency of a sensor assembly to detect contaminants on a surface of the sensor assembly. A change is measured in a frequency response of the sensor assembly to determine a presence and an amount of the contaminants on the surface. A cleaning mode is determined based on an amount of the contaminants on the surface. A cleaning is determined phase based on the amount of the contaminants on the surface. A cleaning control signal is provided to an actuator of the sensor assembly to expel the contaminants from the surface.
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公开(公告)号：US10663418B2
公开(公告)日：2020-05-26
申请号：US15887923
申请日：2018-02-02
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： David Patrick Magee , Stephen John Fedigan
Abstract: In described examples, one or more devices include: apparatus including a lens element and a transducer to vibrate the lens element at an operating frequency when operating in an activated state; and controller circuitry. The controller circuitry is arranged to measure an impedance of the apparatus, to determine an estimated temperature of the apparatus in response to the measured impedance, to compare the estimated temperature against a temperature threshold for delineating an operating temperature range of the apparatus, and to toggle an activation state of the transducer in response to comparing the estimated temperature against the temperature threshold.
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Patent Agency Ranking
公开(公告)号：US10591720B2
公开(公告)日：2020-03-17
申请号：US15377492
申请日：2016-12-13
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Stephen John Fedigan , David Patrick Magee
Abstract: An apparatus for mitigating contamination of an optical device comprises an open-topped, closed-sided, and closed-bottomed housing cup partially defining a protected volume to enclose the optical device. A housing cap encloses a top of the housing cup and partially defines the protected volume. The housing cap includes a top collar having an open central aperture. A top cover laterally spans the central aperture of the top collar. An interface structure circumscribes the top cover to suspend the top cover downwardly into the housing cup from the top collar. The interface structure prevents direct contact between the top cover and the top collar.
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公开(公告)号：US20190107580A1
公开(公告)日：2019-04-11
申请号：US16208344
申请日：2018-12-03
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Stephen John Fedigan
IPC: G01R31/34
CPC classification number: G01R31/346 , G01R31/343
Abstract: An example fault detection circuit includes: a positive sequence voltage calculator to calculate a positive sequence voltage value for a three-phase motor; a positive sequence current calculator to calculate a positive sequence current value for the three-phase motor; an interpolator to calculate an expected negative sequence voltage value based on the positive sequence voltage value, the positive sequence current value, and measured characteristics of the three-phase motor; a negative sequence voltage calculator to calculate a measured negative sequence voltage value for the three-phase motor; and a fault detector to detect that a winding fault exists in the three-phase motor when a difference between the expected negative sequence voltage value and the measured negative sequence voltage value satisfies a threshold.
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公开(公告)号：US20180246323A1
公开(公告)日：2018-08-30
申请号：US15903569
申请日：2018-02-23
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Stephen John Fedigan , David Patrick Magee
CPC classification number: G02B27/0006 , B08B7/02 , B60S1/56
Abstract: In described examples, a transducer vibrates a lens element at a first frequency and a different second frequency. Controller circuitry selects one of a cleaning mode and a heating mode in response to an estimated temperature of the lens element. The controller circuitry activates the transducer to vibrate the lens element at the first frequency in response to the controller circuitry selecting the cleaning mode. The controller circuitry activates the transducer to vibrate the lens element at the second frequency in response to the controller circuitry selecting the heating mode.
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公开(公告)号：US20180243804A1
公开(公告)日：2018-08-30
申请号：US15907125
申请日：2018-02-27
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： David Patrick Magee , Stephen John Fedigan
CPC classification number: B08B7/028 , B08B7/0064 , B08B7/04 , B60S1/56 , G02B27/0006
Abstract: In described examples, a transducer vibrates a lens element in a heating mode and a cleaning mode. Controller circuitry activates the transducer in the heating mode in response to an estimated temperature, and activates the transducer in the cleaning mode after the transducer is activated in the heating mode.
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公开(公告)号：US20180224385A1
公开(公告)日：2018-08-09
申请号：US15887923
申请日：2018-02-02
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： David Patrick Magee , Stephen John Fedigan
CPC classification number: G01N27/028 , B06B1/0292 , B06B1/0644 , G01K7/16 , G05B1/03 , G05D23/1917 , H03K7/08
Abstract: In described examples, one or more devices include: apparatus including a lens element and a transducer to vibrate the lens element at an operating frequency when operating in an activated state; and controller circuitry. The controller circuitry is arranged to measure an impedance of the apparatus, to determine an estimated temperature of the apparatus in response to the measured impedance, to compare the estimated temperature against a temperature threshold for delineating an operating temperature range of the apparatus, and to toggle an activation state of the transducer in response to comparing the estimated temperature against the temperature threshold.
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