Patents by Inventor Sheng Wan
Sheng Wan 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: 11300783Abstract: Techniques for resolving hemisphere ambiguity are disclosed. One or more magnetic fields are emitted at a handheld controller. The one or more magnetic fields are detected by one or more sensors positioned relative to a headset. Movement data corresponding to the handheld controller or the headset is detected. During a first time interval, a first position and a first orientation of the handheld controller within a first hemisphere are determined based on the detected one or more magnetic fields, and a first discrepancy is calculated based on the first position, the first orientation, and the movement data. During a second time interval, a second position and a second orientation of the handheld controller within a second hemisphere are determined based on the detected one or more magnetic fields, and a second discrepancy is calculated based on the second position, the second orientation, and the movement data.Type: GrantFiled: January 24, 2020Date of Patent: April 12, 2022Assignee: Magic Leap, Inc.Inventors: Ronald Joseph Degges, Jr., Sheng Wan, Andy Warner, Akash Gujarati
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Publication number: 20220057867Abstract: The invention relates generally to a user interaction system having a head unit for a user to wear and a totem that the user holds in their hand and determines the location of a virtual object that is seen by the user. A fusion routine generates a fused location of the totem in a world frame based on a combination of an EM wave and a totem IMU data. The fused pose may drift over time due to the sensor's model mismatch. An unfused pose determination modeler routinely establishes an unfused pose of the totem relative to the world frame. A drift is declared when a difference between the fused pose and the unfused pose is more than a predetermined maximum distance.Type: ApplicationFiled: November 3, 2021Publication date: February 24, 2022Applicant: Magic Leap, Inc.Inventor: Sheng WAN
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Patent number: 11216086Abstract: The invention relates generally to a user interaction system having a head unit for a user to wear and a totem that the user holds in their hand and determines the location of a virtual object that is seen by the user. A fusion routine generates a fused location of the totem in a world frame based on a combination of an EM wave and a totem IMU data. The fused pose may drift over time due to the sensor's model mismatch. An unfused pose determination modeler routinely establishes an unfused pose of the totem relative to the world frame. A drift is declared when a difference between the fused pose and the unfused pose is more than a predetermined maximum distance.Type: GrantFiled: August 25, 2020Date of Patent: January 4, 2022Assignee: Magic Leap, Inc.Inventor: Sheng Wan
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Publication number: 20210239993Abstract: Head-mounted augmented reality (AR) devices can track pose of a wearer's head or pose of a hand-held user input device to enable wearer interaction in a three-dimensional AR environment. A pose sensor (e.g., an inertial measurement unit) in the user input device can provide data on pose (e.g., position or orientation) of the user input device. An electromagnetic (EM) tracking system can also provide pose data. For example, the 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. The AR device can combine the output of the pose sensor and the EM tracking system to reduce drift in the estimated pose of the user input device or to transform the pose into a world coordinate system used by the AR device. The AR device can utilize a Kalman filter to combine the output of the pose sensor and the EM tracking system.Type: ApplicationFiled: April 22, 2021Publication date: August 5, 2021Inventors: Sheng Wan, Michael Janusz Woods
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Publication number: 20210225085Abstract: Embodiments resolve hemisphere ambiguity at a system comprising sensors. A hand-held controller of the system emits magnetic fields. Sensors positioned within a headset of the system detect the magnetic fields. A first position and orientation of the hand-held controller is determined within a first hemisphere with respect to the headset based on the magnetic fields. A second position and orientation of the hand-held controller is determined within a second hemisphere, diametrically opposite the first hemisphere, with respect to the headset based on the magnetic fields. A normal vector is determined with respect to the headset, and a position vector identifying a position of the hand-held controller with respect to the headset in the first hemisphere. A dot-product of the normal vector and the position vector is calculated, and the first position and orientation of the hand-held controller is determined to be accurate when a result of the dot-product is positive.Type: ApplicationFiled: December 28, 2020Publication date: July 22, 2021Applicant: Magic Leap, Inc.Inventor: Sheng Wan
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Patent number: 11016305Abstract: Head-mounted augmented reality (AR) devices can track pose of a wearer's head or pose of a hand-held user input device to enable wearer interaction in a three-dimensional AR environment. A pose sensor (e.g., an inertial measurement unit) in the user input device can provide data on pose (e.g., position or orientation) of the user input device. An electromagnetic (EM) tracking system can also provide pose data. For example, the 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. The AR device can combine the output of the pose sensor and the EM tracking system to reduce drift in the estimated pose of the user input device or to transform the pose into a world coordinate system used by the AR device.Type: GrantFiled: March 6, 2020Date of Patent: May 25, 2021Assignee: Magic Leap, Inc.Inventors: Sheng Wan, Michael Janusz Woods
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Patent number: 10916064Abstract: Embodiments resolve hemisphere ambiguity at a system comprising sensors. A hand-held controller of the system emits magnetic fields. Sensors positioned within a headset of the system detect the magnetic fields. A first position and orientation of the hand-held controller is determined within a first hemisphere with respect to the headset based on the magnetic fields. A second position and orientation of the hand-held controller is determined within a second hemisphere, diametrically opposite the first hemisphere, with respect to the headset based on the magnetic fields. A normal vector is determined with respect to the headset, and a position vector identifying a position of the hand-held controller with respect to the headset in the first hemisphere. A dot-product of the normal vector and the position vector is calculated, and the first position and orientation of the hand-held controller is determined to be accurate when a result of the dot-product is positive.Type: GrantFiled: July 23, 2019Date of Patent: February 9, 2021Assignee: Magic Leap, Inc.Inventor: Sheng Wan
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Publication number: 20200387241Abstract: The invention relates generally to a user interaction system having a head unit for a user to wear and a totem that the user holds in their hand and determines the location of a virtual object that is seen by the user. A fusion routine generates a fused location of the totem in a world frame based on a combination of an EM wave and a totem IMU data. The fused pose may drift over time due to the sensor's model mismatch. An unfused pose determination modeler routinely establishes an unfused pose of the totem relative to the world frame. A drift is declared when a difference between the fused pose and the unfused pose is more than a predetermined maximum distance.Type: ApplicationFiled: August 25, 2020Publication date: December 10, 2020Applicant: Magic Leap, Inc.Inventor: Sheng WAN
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Publication number: 20200326544Abstract: Head-mounted augmented reality (AR) devices can track pose of a wearer's head or pose of a hand-held user input device to enable wearer interaction in a three-dimensional AR environment. A pose sensor (e.g., an inertial measurement unit) in the user input device can provide data on pose (e.g., position or orientation) of the user input device. An electromagnetic (EM) tracking system can also provide pose data. For example, the 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. The AR device can combine the output of the pose sensor and the EM tracking system to reduce drift in the estimated pose of the user input device or to transform the pose into a world coordinate system used by the AR device.Type: ApplicationFiled: March 6, 2020Publication date: October 15, 2020Inventors: Sheng Wan, Michael Janusz Woods
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Patent number: 10795458Abstract: The invention relates generally to a user interaction system having a head unit for a user to wear and a totem that the user holds in their hand and determines the location of a virtual object that is seen by the user. A fusion routine generates a fused location of the totem in a world frame based on a combination of an EM wave and a totem IMU data. The fused pose may drift over time due to the sensor's model mismatch. An unfused pose determination modeler routinely establishes an unfused pose of the totem relative to the world frame. A drift is declared when a difference between the fused pose and the unfused pose is more than a predetermined maximum distance.Type: GrantFiled: July 26, 2019Date of Patent: October 6, 2020Assignee: Magic Leap, Inc.Inventor: Sheng Wan
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Publication number: 20200241292Abstract: Techniques for resolving hemisphere ambiguity are disclosed. One or more magnetic fields are emitted at a handheld controller. The one or more magnetic fields are detected by one or more sensors positioned relative to a headset. Movement data corresponding to the handheld controller or the headset is detected. During a first time interval, a first position and a first orientation of the handheld controller within a first hemisphere are determined based on the detected one or more magnetic fields, and a first discrepancy is calculated based on the first position, the first orientation, and the movement data. During a second time interval, a second position and a second orientation of the handheld controller within a second hemisphere are determined based on the detected one or more magnetic fields, and a second discrepancy is calculated based on the second position, the second orientation, and the movement data.Type: ApplicationFiled: January 24, 2020Publication date: July 30, 2020Applicant: Magic Leap, Inc.Inventors: Ronald Joseph Degges, JR., Sheng Wan, Andy Warner, Akash Gujarati
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Publication number: 20200042108Abstract: The invention relates generally to a user interaction system having a head unit for a user to wear and a totem that the user holds in their hand and determines the location of a virtual object that is seen by the user. A fusion routine generates a fused location of the totem in a world frame based on a combination of an EM wave and a totem IMU data. The fused pose may drift over time due to the sensor's model mismatch. An unfused pose determination modeler routinely establishes an unfused pose of the totem relative to the world frame. A drift is declared when a difference between the fused pose and the unfused pose is more than a predetermined maximum distance.Type: ApplicationFiled: July 26, 2019Publication date: February 6, 2020Applicant: Magic Leap, Inc.Inventor: Sheng WAN
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Publication number: 20200027275Abstract: Embodiments resolve hemisphere ambiguity at a system comprising sensors. A hand-held controller of the system emits magnetic fields. Sensors positioned within a headset of the system detect the magnetic fields. A first position and orientation of the hand-held controller is determined within a first hemisphere with respect to the headset based on the magnetic fields. A second position and orientation of the hand-held controller is determined within a second hemisphere, diametrically opposite the first hemisphere, with respect to the headset based on the magnetic fields. A normal vector is determined with respect to the headset, and a position vector identifying a position of the hand-held controller with respect to the headset in the first hemisphere. A dot-product of the normal vector and the position vector is calculated, and the first position and orientation of the hand-held controller is determined to be accurate when a result of the dot-product is positive.Type: ApplicationFiled: July 23, 2019Publication date: January 23, 2020Applicant: Magic Leap, Inc.Inventor: Sheng Wan
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Patent number: 8762091Abstract: An apparatus for measuring an inertial property on a set of one or more axes is disclosed. The apparatus includes a first inertial sensor arranged to measure the inertial property, having a first predetermined resolution and a first predetermined measurement range, and a second inertial sensor arranged to measure the inertial property, having a second predetermined resolution and a second predetermined measurement range. The second resolution is coarser than the first and the second measurement range is larger than the first. A processing system is adapted to receive measurement signals from the first and second inertial sensors and, when the output of the first inertial sensor is within the first predetermined measurement range, to update an error estimate for adjusting the output of the second inertial sensor, based on the measurement signals from the first and second inertial sensors.Type: GrantFiled: June 3, 2011Date of Patent: June 24, 2014Assignee: Thales Visionix, Inc.Inventors: Eric Foxlin, Sheng Wan
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Publication number: 20050070641Abstract: The present invention provides a polycarbonate resin composition of a high light reflectance comprising the following elements. A base material is formed by mixing from 50 to 99% by weight of a polycarbonate resin and from 1 to 50% by weight of a titania (TiO2). Wherein, one hundred parts of the base material is using as a calculating base. Further, 0.5 to 50 parts by weight of a brightness improver and 0.05 to 0.5 parts by weight of a stabilizer are added to the base material. Hence, the polycarbonate resin of the present invention not only can achieve the effect of high light reflectance, but also can provide with the advantages of the property of the thermal stability and the color stability.Type: ApplicationFiled: September 30, 2003Publication date: March 31, 2005Inventors: Chih Liu, Liu Chi, Sheng Wan
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Patent number: 5538721Abstract: The invention provides methods for stabilizing amino-substituted steroid therapeutic agents in topical ophthalmic and other pharmaceutical formulations using effective stabilizing amounts of lightly cross-linked carboxy-containing polymers; and methods for stabilizing and solubilizing amino-substituted steroid therapeutic agents in such pharmaceutical formulations using effective stabilizing amounts of lightly cross-linked carboxy-containing polymers and amounts of selected cyclodextrin derivatives sufficient to at least partially solubilize the therapeutic agents. The cyclodextrin derivatives are selected from the group consisting of the hydroxypropyl, hydroxyethyl, glucosyl, maltosyl and maltotriosyl derivatives of .beta.- and .gamma.-cyclodextrin. Stabilized and stabilized/solubilized pharmaceutical compositions adapted for various routes of administration are also described.Type: GrantFiled: February 28, 1994Date of Patent: July 23, 1996Assignee: InSite Vision IncorporatedInventors: John C. Babcock, Jon R. Polansky, Lyle M. Bowman, Sheng-Wan Tsao, Erwin C. C. Si, Santosh K. Chandrasekaran
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Patent number: 5332582Abstract: The invention provides methods for stabilizing amino-substituted steroid therapeutic agents in topical ophthalmic and other pharmaceutical formulations using effective stabilizing amounts of lightly cross-linked carboxy-containing polymers; Stabilized and stabilized/solubilized pharmaceutical compositions adapted for various routes of administration are also described.Type: GrantFiled: December 2, 1992Date of Patent: July 26, 1994Assignee: Insite Vision IncorporatedInventors: John C. Babcock, Jon R. Polansky, Lyle M. Bowman, Sheng-Wan Tsao, Erwin C. Si, Santosh K. Chandrasekaran
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Patent number: 5256408Abstract: Methods and compositions for preventing or treating ophthalmic diseases or disorders wherein an ophthalmically effective amount of the C.sub.20 through C.sub.26 aminosteroids of formula XI and their pharmaceutical, acceptable salts, hydrates or solvates is administered in an inert vehicle to arrest oxidation processes damaging to the eye.Type: GrantFiled: February 19, 1992Date of Patent: October 26, 1993Assignee: Insite Vision IncorporatedInventors: John G. Babcock, Jon R. Polansky, Lyle M. Bowman, Sheng-Wan Tsao, Erwin C. Si, Santosh K. Chandrasekaran
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Patent number: 5252319Abstract: Methods and compositions for preventing or treating ophthalmic diseases or disorders wherein an ophthalmically effective amount of the C.sub.20 through C.sub.26 aminosteroids of formula XI and their pharmaceutical, acceptable salts, hydrates or solvates is administered in an inert vehicle to arrest oxidation processes damaging to the eye.Type: GrantFiled: February 19, 1992Date of Patent: October 12, 1993Assignee: Insite Vision IncorporatedInventors: John C. Babcock, Jon R. Polansky, Lyle M. Bowman, Sheng-Wan Tsao, Erwin C.-C. Si, Santosh K. Chandrasekaran
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Patent number: 5209926Abstract: Methods and compositions for preventing or treating ophthalmic diseases or disorders wherein an ophthalmically effective amount of the C.sub.20 through C.sub.26 aminosteroids of formula XI and their pharmaceutical, acceptable salts, hydrates or solvates is administered in an inert vehicle to arrest oxidation processes damaging to the eye.Type: GrantFiled: August 24, 1992Date of Patent: May 11, 1993Assignee: InSite Vision IncorporatedInventors: John C. Babcock, Jon R. Polansky, Lyle M. Bowman, Sheng-Wan Tsao, Erwin C. Si, Santosh K. Chandrasekaran