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21.发明申请公开(公告)号：US20190103829A1
公开(公告)日：2019-04-04
申请号：US16147434
申请日：2018-09-28
Applicant: Apple Inc.
Inventor： Hari Vasudevan , Eileen A. Mazzochette , Arman Hajati , Shingo Yoneoka
Abstract: A system for providing closed-loop control of a linear resonant actuator using Back Electromotive Force (EMF) and inertial compensation is disclosed. In an embodiment, one or more inertial sensors are used to estimate low frequency motion of a haptic engine moving mass and compensate for the motion using a feedforward model, thus providing a more robust closed-loop control system for controlling the moving mass when subjected to low frequency disturbances by a user, for example, shaking or swinging the device.
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公开(公告)号：US20180316296A1
公开(公告)日：2018-11-01
申请号：US15698559
申请日：2017-09-07
Applicant: Apple Inc.
Inventor： Arman Hajati , Hari Vasudevan
IPC: H02P25/032 , H02K11/215 , H02P29/68 , H02K11/25
CPC classification number: H02P25/032 , H02K11/215 , H02K11/25 , H02K33/16 , H02P29/685
Abstract: In an embodiment of a system for closed-loop control of a linear resonant actuator, a system processor coupled to a magnetic field sensor is configured to: receive a magnetic field sensor signal from a channel coupling a magnetic field sensor and the system processor; receive measurements of actuator current and actuator voltage from drive electronics; receive a temperature signal from a linear resonant actuator, the temperature signal indicating a temperature of the magnetic field sensor; calculate a first estimate of mass position using the magnetic field sensor signal, actuator current and a magnetic model; calculate an estimate of coil resistance based on the temperature signal, the actuator current, the actuator voltage and a thermal model; and calculate a second estimate of mass position and an estimate of mass velocity based on the first estimate of mass position, the actuator current, the actuator voltage and the estimated coil resistance.
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公开(公告)号：US09851798B2
公开(公告)日：2017-12-26
申请号：US15249946
申请日：2016-08-29
Applicant: Apple Inc.
Inventor： Richard L. Baer , Arman Hajati
CPC classification number: G06F3/016 , G06F1/1613
Abstract: An electronic device may include a haptic actuator that includes an actuator housing, coils carried within the actuator housing, and a field member movable within the actuator housing responsive to the coils. The haptic actuator may also include spaced apart Hall Effect sensors carried within the actuator housing between the coils and for sensing a temperature of the field member. The electronic device may also include a controller coupled to the haptic actuator and configured to determine a temperature of the field member based upon the spaced apart Hall Effect sensors and drive the haptic actuator based upon the temperature.
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公开(公告)号：US11385463B1
公开(公告)日：2022-07-12
申请号：US16932880
申请日：2020-07-20
Applicant: Apple Inc.
Inventor： Arman Hajati , Alexander Shpunt
Abstract: An optical system includes a transparent display, which has a first side configured to be positioned in proximity to an eye of an observer and a second side opposite the first side, and which is configured to project an image into the eye. An image generator is configured to generate a sequence of images during respective display intervals, which are interleaved with blanking intervals, and to transmit the images to the transparent display for projection into the eye. A shutter is positioned on the second side of the display and having a first state in which the shutter blocks optical radiation and a second state in which the shutter transmits optical radiation. A controller drives the image generator and the shutter so that the shutter operates in the first state during the display intervals and in the second state during the blanking intervals.
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公开(公告)号：US11290694B1
公开(公告)日：2022-03-29
申请号：US17134569
申请日：2020-12-28
Applicant: APPLE INC.
Inventor： Arman Hajati
IPC: H04N9/31
Abstract: Optical scanning apparatus includes an emitter array, including a semiconductor substrate and a plurality of optical emitters, which are configured to emit respective beams of optical radiation and which are arranged on the semiconductor substrate in an array of rows and columns, the columns having mutually-parallel column axes. A scanner is configured to intercept and deflect the emitted beams at respective angles that vary about a scan axis that is parallel to the column axes. Control circuitry is configured to select the optical emitters that are to be actuated to emit the respective beams in each of a succession of time slots and to drive the scanner in synchronization with the time slots to deflect the emitted beams at an angular scan rate selected so as to cause the beams emitted from successive columns of the array to impinge on an image plane in succession along a common line.
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Patent Agency Ranking
公开(公告)号：US11237332B1
公开(公告)日：2022-02-01
申请号：US16871068
申请日：2020-05-11
Applicant: Apple Inc.
Inventor： Arman Hajati , Robert S. Upton , Yuval Gerson
Abstract: An optical apparatus includes an optically transparent slab waveguide including first and second, mutually-parallel planar faces and an edge non-parallel to the planar faces. A radiation source directs a beam of optical radiation to enter the waveguide through the first planar face at an entrance location and entrance angle selected so that the beam subsequently exits the waveguide at an exit location in a surface selected from among the second planar face and the edge. A scanning mirror is positioned to receive the beam that has exited through the surface and to reflect the beam back through the surface into the waveguide while the scanning mirror rotates about an axis parallel to the surface over a range of angles selected so as to cause the beam, after reflection back into the waveguide through the surface, to propagate within the waveguide by total internal reflection (TIR).
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27.发明授权公开(公告)号：US10890973B2
公开(公告)日：2021-01-12
申请号：US15659337
申请日：2017-07-25
Applicant: Apple Inc.
Inventor： Arman Hajati
Abstract: An electronic device may include a linear haptic actuator that may include a housing, coils carried by the housing, and a field member linearly movable within the housing and that may include at least one permanent magnet cooperating with the coils. The electronic device may also include a controller configured to drive the coils in a multi-phase arrangement so that at least one coil is driven while at least one other coil is used to sense a position of the field member.
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公开(公告)号：US20200088994A1
公开(公告)日：2020-03-19
申请号：US16554312
申请日：2019-08-28
Applicant: Apple Inc.
Inventor： Arman Hajati , Robert S. Upton , Yuval Gerson
Abstract: A display system may display image frames. The system may include a scanning mirror and an array of staggered light emitting elements. The light emitting elements may emit image light and collimating optics may direct the light at the scanning mirror, which reflects the image light while rotating about an axis. Control circuitry may selectively activate the light emitting elements across tangential and sagittal axes of the image frame while controlling the scanning mirror to scan across the sagittal axis.
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公开(公告)号：US20200018622A1
公开(公告)日：2020-01-16
申请号：US16581661
申请日：2019-09-24
Applicant: Apple Inc.
Inventor： Denis G. Chen , Arman Hajati , Manoj K. Bhattacharyya
Abstract: An integrated circuit (IC) chip including an array of asymmetrically distributed magnetic field sensing elements. Additionally, an integrated circuit (IC) chip includes a substrate, a sensing coil supported by the substrate and enclosing a portion of substrate, and a Hall effect sensor supported by the portion of the substrate enclosed by the sensing coil.
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公开(公告)号：US10345907B2
公开(公告)日：2019-07-09
申请号：US15814626
申请日：2017-11-16
Applicant: Apple Inc.
Inventor： Arman Hajati , Kayo Yanagisawa
IPC: H01F7/16 , H02N2/02 , H01F41/064 , G06F3/01
Abstract: A haptic actuator may include a housing, coils carried within the housing, and a field member moveable within the housing between the coils and including at least one permanent magnet. A controller may be coupled to the coils and configured to sense a respective back electromotive force (EMF) value of each of the coils and determine a position of the field member in dimensions based upon the back EMF values and motor constant values.
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