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公开(公告)号：US20230115590A1
公开(公告)日：2023-04-13
申请号：US18046934
申请日：2022-10-16
Applicant: Microsoft Technology Licensing, LLC
Inventor： Algird Michael GUDAITIS , Mark Alan CHAMPION
Abstract: Examples are disclosed herein related to controlling a scanning mirror system. One example provides a display device, comprising a light source, a scanning mirror system configured to scan light from the light source in a first direction at a first, higher scan rate, and in a second direction at a second, lower scan rate, and a drive circuit configured to control the scanning mirror system to display video image data by providing a control signal to the scanning mirror system to control scanning in the second direction, and for each video image data frame of at least a subset of video image data frames, combining the control signal with an adjustment signal to adjust the scanning in the second direction, the adjustment signal comprising a low pass filtered signal with a cutoff frequency based on a lowest resonant frequency of the scanning mirror system in the second direction.
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公开(公告)号：US20190229543A1
公开(公告)日：2019-07-25
申请号：US15875412
申请日：2018-01-19
Applicant: Microsoft Technology Licensing, LLC
Inventor： Stefan Jon KRISTJANSSON , Algird Michael GUDAITIS
Abstract: The present disclosure relates to apparatuses and methods of providing an ideal diode function to a battery having a protective field effect transistor (FET). An apparatus may include the protective FET configured to selectively connect an external voltage to a battery for charging the battery. The apparatus may also include a controller coupled with a gate of the protective FET via a node and configured to enable the protective FET. The apparatus may further include an override circuit coupled to the node and configured to selectively draw current away from the gate of the protective FET based on the external voltage or to interrupt the path from a controller to a protective FET. The override circuit of the apparatus may provide protection from cross-charging of the battery by a second battery while using the protective FET that is already used for charge/discharge protection.
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公开(公告)号：US20210286169A1
公开(公告)日：2021-09-16
申请号：US17326027
申请日：2021-05-20
Applicant: MICROSOFT TECHNOLOGY LICENSING, LLC
Inventor： Gregory Theodore GIBSON , Algird Michael GUDAITIS
Abstract: Controlling a mirror in a MEMS based projector. A method includes iteratively performing various acts. The method includes inputting a time domain target wave array, with target elements, to a system for a MEMS coupled to the mirror of the projector. The time domain target wave array includes a set of n target elements. The method further includes driving the driver to move the mirror using elements in a drive array comprising a set of drive elements. The method further includes sampling a time domain output wave for the movement of the mirror to construct an output wave array with output elements corresponding to the target elements. The method further includes identifying errors between the target elements and the output elements. The method further includes modifying the drive elements in the drive array to attempt to minimize the errors when driving the MEMS on subsequent drive cycles.
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Patent Agency Ranking
公开(公告)号：US20190123512A1
公开(公告)日：2019-04-25
申请号：US15791329
申请日：2017-10-23
Applicant: Microsoft Technology Licensing, LLC
Inventor： Algird Michael GUDAITIS , Raymond Kirk PRICE , Niranjan Achugundla PUTTASWAMY , Sheethal Somesh NAYAK , John Allen Tardif
Abstract: A modulated light source comprises a laser diode and a drive circuit coupled operatively to the laser diode. The laser diode is configured to lase upon passing an above-threshold current for an accumulation period. The drive circuit is configured to draw a priming current through the laser diode over a priming period, the priming current being insufficient to cause the laser diode to lase during the priming period, but sufficient to shorten the accumulation period. The drive circuit is further configured to draw the above-threshold current through the laser diode after the priming period, thereby triggering emission from the laser diode following a shortened accumulation period.
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公开(公告)号：US20250093652A1
公开(公告)日：2025-03-20
申请号：US18470342
申请日：2023-09-19
Applicant: Microsoft Technology Licensing, LLC
Inventor： Lasse-Petteri LEPPANEN , Xiao Chuan ONG , Yarn Chee POON , Yifei ZHANG , Wyatt Owen DAVIS , Matthew David ELLIS , Algird Michael GUDAITIS , Akash ARORA
Abstract: One example provides a head mounted display (HMD) device comprising a projection system and left eye and right eye display optical paths configured to transmit left eye and right eye images for viewing. The projection system comprises left and right display image projectors. The HMD device further comprises a display alignment tracker (DAT) system comprising a DAT optical path comprising left side and right side DAT optical paths. The DAT system further comprises a camera coupled to an output of the DAT optical path, and a visible light filter located along the DAT optical path. The HMD device further comprises a controller configured to control the projection system to output a fiducial image comprising a visible color of light transmitted by the visible light filter and to blank the visible color of the fiducial image from a fiducial portion of both the left and right eye images.
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公开(公告)号：US20230384582A1
公开(公告)日：2023-11-30
申请号：US17827413
申请日：2022-05-27
Applicant: Microsoft Technology Licensing, LLC
Inventor： Wenjun LIAO , Algird Michael GUDAITIS , Ruipeng SUN
CPC classification number: G02B26/0833 , H03H21/0021 , B81B7/008 , B81B2201/042
Abstract: The configuring of a micromirror to suppress a resonance of the micromirror. As part of the configuring process, the micromirror is subjected to multiple actuation frequencies, and the micromirror response is measured in response to at least some of these actuation frequencies. A resonant frequency of the micromirror is then determined using at least some of the measured mechanical responses. Then, depending on this determined resonant frequency of the micromirror, notch filter parameters are selected. There is more than one possibility for notch filter parameters, where the selected possibility depends on the determined resonant frequency. The notch filter is then configured with the selected notch filter parameters.
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公开(公告)号：US20230069514A1
公开(公告)日：2023-03-02
申请号：US17465812
申请日：2021-09-02
Applicant: MICROSOFT TECHNOLOGY LICENSING, LLC
Inventor： Wenjun LIAO , Algird Michael GUDAITIS
Abstract: This disclosure provides methods and systems that adaptively adjust the gain of the drive signal to a slow-scan mirror to compensate and stabilize the mirror to achieve desired performance metrics. Non-ideal characteristics of the slow-scan mirror, including the mirror and related assembly, exhibit behaviors that impact the overall gain of the device, which changes over time and operating environment. To compensate for these non-ideal characteristics, the drive signal to the slow-scan mirror may need to be adjusted to achieve the desired beam deflection angle. An adaptive inner loop gain control structure may be employed to dynamically adjust the gain of the inner-control loop to achieve a target gain such that the overall gain variations from the slow scan mirror and other components are scan mirror such that compensated and stabilized. The parameters, logic and blocks of the inner loop gain control may be implemented in hardware, software, or combinations thereof.
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公开(公告)号：US20200374495A1
公开(公告)日：2020-11-26
申请号：US16421241
申请日：2019-05-23
Applicant: MICROSOFT TECHNOLOGY LICENSING, LLC
Inventor： Gregory Theodore GIBSON , Algird Michael GUDAITIS
Abstract: Controlling a mirror in a MEMS based projector. A method includes iteratively performing various acts. The method includes inputting a time domain target wave array, with target elements, to a system for a MEMS coupled to the mirror of the projector. The time domain target wave array includes a set of n target elements. The method further includes driving the driver to move the mirror using elements in a drive array comprising a set of drive elements. The method further includes sampling a time domain output wave for the movement of the mirror to construct an output wave array with output elements corresponding to the target elements. The method further includes identifying errors between the target elements and the output elements. The method further includes modifying the drive elements in the drive array to attempt to minimize the errors when driving the MEMS on subsequent drive cycles.
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