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公开(公告)号：US20200064431A1
公开(公告)日：2020-02-27
申请号：US16670172
申请日：2019-10-31
申请人： Magic Leap, Inc.
发明人： Brian Bucknor , Christopher Lopez , Michael Janusz Woods , Aly H. M. Aly , James William Palmer , Evan Francis Rynk
摘要： Head-mounted augmented reality (AR) devices can track pose of a wearer's head to provide a three-dimensional virtual representation of objects in the wearer's environment. An electromagnetic (EM) tracking system can track head or body pose. A handheld user input device can include an EM emitter that generates an EM field, and the head-mounted AR device can include an EM sensor that senses the EM field. EM information from the sensor can be analyzed to determine location and/or orientation of the sensor and thereby the wearer's pose. The EM emitter and sensor may utilize time division multiplexing (TDM) or dynamic frequency tuning to operate at multiple frequencies. Voltage gain control may be implemented in the transmitter, rather than the sensor, allowing smaller and lighter weight sensor designs. The EM sensor can implement noise cancellation to reduce the level of EM interference generated by nearby audio speakers.
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公开(公告)号：US20210165217A1
公开(公告)日：2021-06-03
申请号：US17171328
申请日：2021-02-09
申请人： Magic Leap, Inc.
发明人： Brian Bucknor , Christopher Lopez , Michael Janusz Woods , Aly H. M. Aly , James William Palmer , Evan Francis Rynk
摘要： Head-mounted augmented reality (AR) devices can track pose of a wearer's head to provide a three-dimensional virtual representation of objects in the wearer's environment. An electromagnetic (EM) tracking system can track head or body pose. A handheld user input device can include an EM emitter that generates an EM field, and the head-mounted AR device can include an EM sensor that senses the EM field. EM information from the sensor can be analyzed to determine location and/or orientation of the sensor and thereby the wearer's pose. The EM emitter and sensor may utilize time division multiplexing (TDM) or dynamic frequency tuning to operate at multiple frequencies. Voltage gain control may be implemented in the transmitter, rather than the sensor, allowing smaller and lighter weight sensor designs. The EM sensor can implement noise cancellation to reduce the level of EM interference generated by nearby audio speakers.
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3.发明授权公开(公告)号：US12035297B2
公开(公告)日：2024-07-09
申请号：US18167540
申请日：2023-02-10
申请人： Magic Leap, Inc.
发明人： Aly H. M. Aly , Cuthbert Martindale Allen , Humberto Eduardo Garcia , Sumanth Murali , Juan Leopoldo Ballen , Christopher Michael Lopez
CPC分类号： H04W72/1215 , G06F3/14 , H04W24/08 , H04W76/15
摘要： Systems and methods for adaptive frequency hopping for reducing or avoiding electromagnetic interference between two radios operating in the same radio frequency (RF) band are provided. In one aspect, a host device, which includes first and second wireless radios and a hardware processor, can use adaptive frequency hopping among a plurality of RF channels to reduce interference. The device can control the first wireless radio to establish a first wireless connection with a terminal device via a first subset of channels, determine a set of performance statistics for the channels, and replace at least one of the first subset of the channels with a new channel within the plurality of channels based on the statistics. For example, a channel can be replaced if a packet error rate (PER) exceeds a threshold.
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公开(公告)号：US11460698B2
公开(公告)日：2022-10-04
申请号：US17171328
申请日：2021-02-09
申请人： Magic Leap, Inc.
发明人： Brian Bucknor , Christopher Lopez , Michael Janusz Woods , Aly H. M. Aly , James William Palmer , Evan Francis Rynk
IPC分类号： G06F1/16 , G02B27/01 , G06F3/01 , H01H9/02 , G02B27/00 , G01S1/68 , G01S5/02 , G01S1/70 , G06F3/16
摘要： Head-mounted augmented reality (AR) devices can track pose of a wearer's head to provide a three-dimensional virtual representation of objects in the wearer's environment. An electromagnetic (EM) tracking system can track head or body pose. A handheld user input device can include an EM emitter that generates an EM field, and the head-mounted AR device can include an EM sensor that senses the EM field. EM information from the sensor can be analyzed to determine location and/or orientation of the sensor and thereby the wearer's pose. The EM emitter and sensor may utilize time division multiplexing (TDM) or dynamic frequency tuning to operate at multiple frequencies. Voltage gain control may be implemented in the transmitter, rather than the sensor, allowing smaller and lighter weight sensor designs. The EM sensor can implement noise cancellation to reduce the level of EM interference generated by nearby audio speakers.
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5.发明授权公开(公告)号：US11627587B2
公开(公告)日：2023-04-11
申请号：US17260153
申请日：2019-07-19
申请人： Magic Leap, Inc.
发明人： Aly H. M. Aly , Cuthbert Martindale Allen , Humberto Eduardo Garcia , Sumanth Murali , Juan Leopoldo Ballen , Christopher Michael Lopez
摘要： Systems and methods for adaptive frequency hopping for reducing or avoiding electromagnetic interference between two radios operating in the same radio frequency (RF) band are provided. In one aspect, a host device, which includes first and second wireless radios and a hardware processor, can use adaptive frequency hopping among a plurality of RF channels to reduce interference. The device can control the first wireless radio to establish a first wireless connection with a terminal device via a first subset of channels, determine a set of performance statistics for the channels, and replace at least one of the first subset of the channels with a new channel within the plurality of channels based on the statistics. For example, a channel can be replaced if a packet error rate (PER) exceeds a threshold.
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公开(公告)号：US20220404622A1
公开(公告)日：2022-12-22
申请号：US17894845
申请日：2022-08-24
申请人： Magic Leap, Inc.
发明人： Brian Bucknor , Christopher Lopez , Michael Janusz Woods , Aly H. M. Aly , James William Palmer , Evan Francis Rynk
摘要： Head-mounted augmented reality (AR) devices can track pose of a wearer's head to provide a three-dimensional virtual representation of objects in the wearer's environment. An electromagnetic (EM) tracking system can track head or body pose. A handheld user input device can include an EM emitter that generates an EM field, and the head-mounted AR device can include an EM sensor that senses the EM field. EM information from the sensor can be analyzed to determine location and/or orientation of the sensor and thereby the wearer's pose. The EM emitter and sensor may utilize time division multiplexing (TDM) or dynamic frequency tuning to operate at multiple frequencies. Voltage gain control may be implemented in the transmitter, rather than the sensor, allowing smaller and lighter weight sensor designs. The EM sensor can implement noise cancellation to reduce the level of EM interference generated by nearby audio speakers.
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公开(公告)号：US10948721B2
公开(公告)日：2021-03-16
申请号：US16670172
申请日：2019-10-31
申请人： Magic Leap, Inc.
发明人： Brian Bucknor , Christopher Lopez , Michael Janusz Woods , Aly H. M. Aly , James William Palmer , Evan Francis Rynk
摘要： Head-mounted augmented reality (AR) devices can track pose of a wearer's head to provide a three-dimensional virtual representation of objects in the wearer's environment. An electromagnetic (EM) tracking system can track head or body pose. A handheld user input device can include an EM emitter that generates an EM field, and the head-mounted AR device can include an EM sensor that senses the EM field. EM information from the sensor can be analyzed to determine location and/or orientation of the sensor and thereby the wearer's pose. The EM emitter and sensor may utilize time division multiplexing (TDM) or dynamic frequency tuning to operate at multiple frequencies. Voltage gain control may be implemented in the transmitter, rather than the sensor, allowing smaller and lighter weight sensor designs. The EM sensor can implement noise cancellation to reduce the level of EM interference generated by nearby audio speakers.
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公开(公告)号：US11959997B2
公开(公告)日：2024-04-16
申请号：US17100049
申请日：2020-11-20
申请人： Magic Leap, Inc.
CPC分类号： G01S13/46 , G01S7/412 , G08C17/02 , H01Q1/273 , G01S2013/468 , G08C2201/32
摘要： A method of using a first device to locate a second device is disclosed. The first device, while in a first mode, transmits a first signal and receives a second signal comprising a reflection of the first signal by the second device. The first device determines, based on the received second signal, a position of the second device relative to the first device. The first device transitions to a second mode, and while in the second mode, receives a third signal from the second device. The first device determines, based on the third signal, an orientation of the second device relative to the first device. The first device comprises one or more receiving antennas, and the second device comprises one or more transmitting antennas. The third signal corresponds to a transmitting antenna of the second device.
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公开(公告)号：US20190195979A1
公开(公告)日：2019-06-27
申请号：US16288856
申请日：2019-02-28
申请人： Magic Leap, Inc.
发明人： Brian Bucknor , Christopher Lopez , Michael Janusz Woods , Aly H. M. Aly , James William Palmer , Evan Francis Rynk
CPC分类号： G01S1/70 , G02B27/0093 , G02B27/017 , G02B27/0179 , G02B2027/0138 , G02B2027/0178 , G02B2027/0187 , G06F3/165 , H01H9/0228 , H01H9/0235
摘要： Head-mounted augmented reality (AR) devices can track pose of a wearer's head to provide a three-dimensional virtual representation of objects in the wearer's environment. An electromagnetic (EM) tracking system can track head or body pose. A handheld user input device can include an EM emitter that generates an EM field, and the head-mounted AR device can include an EM sensor that senses the EM field. EM information from the sensor can be analyzed to determine location and/or orientation of the sensor and thereby the wearer's pose. The EM emitter and sensor may utilize time division multiplexing (TDM) or dynamic frequency tuning to operate at multiple frequencies. Voltage gain control may be implemented in the transmitter, rather than the sensor, allowing smaller and lighter weight sensor designs. The EM sensor can implement noise cancellation to reduce the level of EM interference generated by nearby audio speakers.
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公开(公告)号：US10261162B2
公开(公告)日：2019-04-16
申请号：US15495597
申请日：2017-04-24
申请人： Magic Leap, Inc.
发明人： Brian Bucknor , Christopher Lopez , Michael Janusz Woods , Aly H. M. Aly , James William Palmer , Evan Francis Rynk
摘要： Head-mounted augmented reality (AR) devices can track pose of a wearer's head to provide a three-dimensional virtual representation of objects in the wearer's environment. An electromagnetic (EM) tracking system can track head or body pose. A handheld user input device can include an EM emitter that generates an EM field, and the head-mounted AR device can include an EM sensor that senses the EM field. EM information from the sensor can be analyzed to determine location and/or orientation of the sensor and thereby the wearer's pose. The EM emitter and sensor may utilize time division multiplexing (TDM) or dynamic frequency tuning to operate at multiple frequencies. Voltage gain control may be implemented in the transmitter, rather than the sensor, allowing smaller and lighter weight sensor designs. The EM sensor can implement noise cancellation to reduce the level of EM interference generated by nearby audio speakers.
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