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公开(公告)号：US10416773B2
公开(公告)日：2019-09-17
申请号：US15853383
申请日：2017-12-22
Applicant: NVF Tech Ltd.
Inventor： Neil John Harris , Martin Colloms
Abstract: A touch sensitive device comprising a touch surface, a force exciter coupled to the touch surface to excite vibration in the surface in response to a signal sent to the exciter, with the touch surface and exciter together forming a coupled system and a signal generator to generate the signal, with the signal generator generating a carrier wave signal at frequencies within the frequency bandwidth of the coupled system and modulating the carrier wave signal with a complex modulation where the modulated carrier wave signal has a time response comparable to that of a low frequency signal which produces a desired haptic sensation whereby a user touching the touch surface excited by the exciter in response to the modulated carrier wave signal experiences the desired haptic sensation which is perceived at a frequency below the frequency bandwidth of the coupled system.
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公开(公告)号：US10362395B2
公开(公告)日：2019-07-23
申请号：US15904077
申请日：2018-02-23
Applicant: NVF Tech Ltd.
Inventor： Neil John Harris
Abstract: A panel loudspeaker controller for controlling a panel loudspeaker including a plurality of actuators, the panel loudspeaker controller including a plurality of electrical signal inputs, each input being associated with each actuator of the panel loudspeaker to be controlled; a plurality of signal processors, each signal processor being associated with each input and having an output for an electrical signal to control an actuator of the panel loudspeaker, and each signal processor implementing a transfer function from its input to its output based on each actuator of the panel loudspeaker to a desired acoustic receiver; and a signal processor controller associated with all of the plurality of signal processors, wherein the signal processor controller is preconfigured to improve phase alignment between the signals as an ensemble output at the outputs of the signal processors.
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公开(公告)号：US20190222920A1
公开(公告)日：2019-07-18
申请号：US16359173
申请日：2019-03-20
Applicant: NVF Tech Ltd
Inventor： Neil John Harris , James East
CPC classification number: H04R1/24 , G06F3/016 , G06F3/0488 , G06F3/165 , H04R1/028 , H04R3/08 , H04R3/12 , H04R7/045 , H04R17/10 , H04R2440/05 , H04R2440/07 , H04R2499/11 , H04S7/307
Abstract: A system includes a flat panel display having a panel resonant frequency response corresponding to a composition, shape, and structure of the flat panel display; and an actuator having an actuator resonant frequency response corresponding to a composition, size, and shape of the actuator; in which the actuator is mechanically-coupled to the flat panel display at a mechanical drive point, in which a coupled resonant frequency response of the system is lower than the panel resonant frequency response of the flat panel display.
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公开(公告)号：US20190200139A1
公开(公告)日：2019-06-27
申请号：US15853289
申请日：2017-12-22
Applicant: NVF Tech Ltd.
Inventor： Mark William Starnes , James East
IPC: H04R17/10 , H01L41/09 , H01L41/253 , H01L41/047 , G01L5/16
Abstract: Methods, systems, and apparatus for using a two-dimensional distributed mode actuator. One of the systems includes a transducer adapted to create a force to cause vibration of a load to generate sound waves, the transducer having a first width along a first axis; a transfer portion connected to the transducer along a first side parallel to the first axis, and having a second width along the first axis that is less than the first width; and a stub connected to the transfer portion along a second side of the transfer portion that is parallel to the first axis and an opposite side from the first side connected to the transducer, having a third width that is greater than the second width, and having a surface adapted to connect to the load to transfer the force received from the transducer through the transfer portion to the load.
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公开(公告)号：US10168783B2
公开(公告)日：2019-01-01
申请号：US15841256
申请日：2017-12-13
Applicant: NVF Tech Ltd.
Inventor： Neil John Harris , Christopher Julian Travis
Abstract: There is disclosed a method of designing a panel assembly for a vibratory panel device, the assembly comprising a panel which supports vibrations and two or more transducers coupled to the panel to transmit vibrations to or receive vibrations from the panel. The method comprises: obtaining the number of transducers to be used in the assembly and their relative positions; obtaining relationships between drive signals to be applied to the respective transducers to provide a desired effect; determining an optimization criterion for the assembly that depends on the obtained relationships; and determining one or more parameters for the respective transducers that satisfy the optimization criterion. The one or more parameters may be selected from amplitudes of drive signals, spacing, activity, area, position, shape, dimension.
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公开(公告)号：US20170102769A1
公开(公告)日：2017-04-13
申请号：US14836667
申请日：2015-08-26
Applicant: NVF TECH LTD
Inventor： Neil John HARRIS , Christopher Julian Travis
CPC classification number: G06F3/016 , G06F3/041 , G06F3/0416 , G06F3/0436 , G06F3/167 , H04R3/02 , H04R5/04 , H04R7/045 , H04R17/005 , H04R2400/01 , H04R2400/03 , H04R2440/05 , H04R2499/11 , H04R2499/15 , H04S2400/05
Abstract: There is disclosed a method of designing a panel assembly for a vibratory panel device, the assembly comprising a panel which supports vibrations and two or more transducers coupled to the panel to transmit vibrations to or receive vibrations from the panel. The method comprises: obtaining the number of transducers to be used in the assembly and their relative positions; obtaining relationships between drive signals to be applied to the respective transducers to provide a desired effect; determining an optimisation criterion for the assembly that depends on the obtained relationships; and determining one or more parameters for the respective transducers that satisfy the optimisation criterion. The one or more parameters may be selected from amplitudes of drive signals, spacing, activity, area, position, shape, dimension.
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公开(公告)号：US20150277565A1
公开(公告)日：2015-10-01
申请号：US14694823
申请日：2015-04-23
Applicant: NVF Tech Ltd.
Inventor： Neil John Harris
CPC classification number: G06F3/016 , G06F3/0416 , G06F3/0418 , G06F3/043
Abstract: A touch sensitive device comprising a panel capable of supporting bending waves, a user-accessible touch sensitive screen on or forming part of a face of the panel, the touch sensitive screen having a plurality of different sensing areas, a plurality of vibration exciters coupled to the panel to apply bending waves to the panel to provide tactile feedback at the plurality of sensing areas in response to the user touching a sensing area, and signal processing means arranged to apply signals to the vibration exciters so as to steer bending waves applied to the panel by the plurality of vibration exciters whereby the amplitude of the applied bending waves is maximised at the sensing area touched by the user and reduced or minimised at each other sensing area.
Abstract translation: 一种触敏装置，包括能够支撑弯曲波的面板，在面板的面上或形成面板的一部分的用户可触摸的触敏屏幕，触敏屏具有多个不同的感测区域，多个振动激励器耦合到 所述面板响应于所述用户触摸感测区域而向所述面板施加弯曲波以在所述多个感测区域提供触觉反馈;以及信号处理装置，其被布置成将信号施加到所述振动激励器，以便引导施加到所述感测区域的弯曲波 通过多个振动激励器，由此所施加的弯曲波的振幅在用户触摸的感测区域处被最大化，并且在彼此的感测区域被减小或最小化。
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公开(公告)号：US10477321B2
公开(公告)日：2019-11-12
申请号：US15912436
申请日：2018-03-05
Applicant: NVF Tech Ltd.
Inventor： Neil John Harris
Abstract: A method includes determining, for a piezoelectric cantilever-type transducer of a distributed mode loudspeaker adapted to cause vibration of a load, a subset of frequencies from a range of frequencies at which to output vibrations, in which the transducer includes two or more electrode pairs positioned along a length of the transducer and each electrode pair including a first electrode on a first side of a piezoelectric layer of the transducer and a second electrode on a second side of the piezoelectric layer of the transducer that is opposite to the first side; selecting, for the subset of frequencies, a respective input voltage for each of the two or more electrode pairs based on a relative position of each pair on the transducer; and applying the respective input voltage to each of the two or more electrode pairs to cause the transducer to generate a vibrational force.
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公开(公告)号：US10462574B1
公开(公告)日：2019-10-29
申请号：US16261435
申请日：2019-01-29
Applicant: NVF Tech Ltd
Inventor： Rajiv Bernard Gomes , Mark William Starnes , Anthony King
Abstract: An actuator includes a frame that includes a panel extending in a plane and one or more pillars extending perpendicular from the plane. The actuator further includes a magnetic circuit assembly that includes a magnet and a voice coil, which are moveable relative to each other along an axis perpendicular to the plane of the panel. The actuator also includes one or more suspension members attaching the frame to a first component of the magnetic circuit assembly. Each suspension member includes a vertical segment attaching the suspension member to a corresponding one of the pillars. Each suspension member also includes a first arm extending away from the corresponding pillar to an end attached to the first component of the magnetic circuit assembly. During operation of the actuator, the first arm of the suspension member flexes to accommodate axial displacements of the magnet relative to the voice coil.
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10.发明申请
公开(公告)号：US20190313194A1
公开(公告)日：2019-10-10
申请号：US16289162
申请日：2019-02-28
Applicant: NVF Tech Ltd
Inventor： Graham Robert Landick
Abstract: An electromagnetic actuator includes an inner magnet arranged relative to an axis, an outer magnet arranged a radial distance from the axis, an inner radial wall of the outer magnet facing an outer radial wall of the inner magnet, the inner and outer radial walls being separated by an air gap, a voice coil arranged in the air gap separating the inner and outer magnets, and an actuator coupling plate attached to the voice coil. The inner magnet is axially magnetized and the outer magnet is radially magnetized. During operation of the device electrical activation of the voice coil causes axial motion of the actuator coupling plate.
