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41. 发明申请

US20110255184A1 SHAPE MEMORY ALLOY ACTUATION APPARATUS 有权
标题翻译：形状记忆合金执行装置
公开(公告)号：US20110255184A1
公开(公告)日：2011-10-20
申请号：US13129520
申请日：2009-11-20
申请人： Richard Topliss
发明人： Richard Topliss
IPC分类号： G02B7/04
CPC分类号： F03G7/065 , G02B7/08 , G03B3/10
摘要： A shape memory alloy actuation apparatus comprises a camera lens element supported on the support structure by a plurality of resilient flexures that guide movement of the movable element along the optical axis. A shape memory alloy actuator biassed by the resilient flexures and an additional resilient biassing element is arranged to drive movement of the camera lens element. An end-stop limits movement of the camera lens element at a position where the shape memory alloy actuator has a predetermined length that is above the length corresponding on the local maximum resistance by an amount not greater than 15% of the difference between (i) the length corresponding to the local maximum resistance and (ii) the length corresponding to the local minimum resistance.
摘要翻译：形状记忆合金致动装置包括通过引导可移动元件沿着光轴的运动的多个弹性挠曲件支撑在支撑结构上的照相机镜头元件。通过弹性挠曲件偏置的形状记忆合金致动器和附加的弹性偏移元件布置成驱动相机透镜元件的运动。停止限制相机镜头元件在形状记忆合金致动器具有预定长度的位置上的运动，该预定长度高于局部最大电阻上对应的长度，其量不大于（i）对应于局部最大电阻的长度和（ii）对应于局部最小电阻的长度。

42. 发明申请

US20100275592A1 CONTROL OF A SHAPE MEMORY ALLOY ACTUATION APPARATUS 有权
标题翻译：形状记忆合金启动装置的控制
公开(公告)号：US20100275592A1
公开(公告)日：2010-11-04
申请号：US12745784
申请日：2008-12-03
申请人： Richard Topliss , Robert John Leedham , David Charles William Richards , Thomas Matthew Gregory
发明人： Richard Topliss , Robert John Leedham , David Charles William Richards , Thomas Matthew Gregory
IPC分类号： F03G7/06
CPC分类号： F03G7/065 , G03B3/10 , G03B5/00
摘要： An SMA actuation arrangement comprises: an SMA actuator arranged on contraction caused by heating to drive movement of a movable element relative to a support structure; a current source operative to supply drive current through the SMA actuator to heat the SMA actuator; and a detector circuit operative to detect a measure of the resistance of the SMA actuator. Whilst detecting a measure of the resistance of the SMA actuator and controlling the drive current on the basis of the measure of the resistance of the SMA actuator; there is derived a measure of an electrical characteristic of the SMA actuator that is representative of the ambient temperature. Whilst applying closed-loop control an offset is added to the control signal which reduces the steady-state value of an error between the measure of the resistance of the SMA actuator and a target value. Whilst applying open-loop control, the control signal is generated taking into account the electrical characteristics of the SMA actuator measured during a calibration stage.
摘要翻译： SMA致动装置包括：SMA致动器，其被布置为由加热引起的收缩，以驱动可移动元件相对于支撑结构的运动; 电流源，用于通过SMA致动器提供驱动电流以加热SMA致动器; 以及检测器电路，用于检测SMA致动器的电阻的测量。同时检测SMA致动器的电阻的测量值，并根据SMA致动器电阻的测量来控制驱动电流; 导出了代表环境温度的SMA致动器的电气特性的测量。在施加闭环控制的同时，控制信号被添加到减少SMA致动器的电阻的测量值与目标值之间的误差的稳态值。在施加开环控制的同时，考虑到在校准阶段期间测量的SMA致动器的电特性，产生控制信号。

43. 发明申请

US20100060776A1 SHAPE MEMORY ALLOY ACTUATION APPARATUS 有权
标题翻译：形状记忆合金执行装置
公开(公告)号：US20100060776A1
公开(公告)日：2010-03-11
申请号：US12525906
申请日：2008-02-11
申请人： Richard Topliss , Dominic George Webber , Robert John Leedham , Anthony Hooley , David Charles Wilson Richards , Thomas Matthew Gregory
发明人： Richard Topliss , Dominic George Webber , Robert John Leedham , Anthony Hooley , David Charles Wilson Richards , Thomas Matthew Gregory
IPC分类号： H04N5/225 , F03G7/06 , G03B3/10
CPC分类号： G03B3/10 , F03G7/065 , H04N5/2254 , H04N5/23212
摘要： A miniature camera lens actuation apparatus comprises a support structure, a camera lens element supported on the support structure by a suspension system; and an SMA actuator connected between the support structure and the movable element to drive movement of the camera lens element. The control circuit may include a drive circuit and a sensor circuit which have separate electrical connections to the SMA actuator to reduce the impact of the resistance of the electrical connections on the sensing. The control circuit may vary the drive signal in response to a temperature signal indicative of the ambient temperature. An endstop limits movement to prevent extension of the SMA actuator in its unheated state beyond a maximum length which is at or below the length corresponding the local maximum resistance of the resistance-length curve. Control of position is effected using resistance of the SMA actuator as a measure of position. The control employs a ‘ratcheting’ method to prevent a failure condition and an initial calibration step to derive a range of target resistance values. In manufacture, the position of a lens holder is adjusted relative to a carrier to provide focussing on the image sensor of an image of an object at a distance in the range from infinity to the hyperfocal distance when the SMA actuator is heated to a predetermined temperature greater than ambient temperature.
摘要翻译：微型相机镜头致动装置包括支撑结构，通过悬挂系统支撑在支撑结构上的照相机镜头元件; 以及SMA致动器，其连接在所述支撑结构和所述可移动元件之间，以驱动所述相机透镜元件的移动。控制电路可以包括驱动电路和传感器电路，其具有到SMA致动器的分离的电连接以减少电连接对感测的电阻的影响。控制电路可以响应于指示环境温度的温度信号来改变驱动信号。止挡限制运动，以防止SMA致动器在其未加热状态下延伸超过对应于电阻长度曲线的局部最大电阻的长度或以下的最大长度。使用SMA致动器的电阻作为位置的度量来控制位置。控制采用“棘轮”方法来防止故障条件和初始校准步骤导出目标电阻值的范围。在制造中，相对于载体调整透镜保持器的位置，以便在将SMA致动器加热到预定温度时，在从无穷远到超焦距离的范围内距离处的物体的图像的图像传感器上聚焦大于环境温度。

44. 发明申请

US20080025533A1 Loudspeaker 审中-公开
标题翻译：喇叭
公开(公告)号：US20080025533A1
公开(公告)日：2008-01-31
申请号：US11587085
申请日：2005-04-21
申请人： David Livingstone , Richard Topliss , Mark Shepherd
发明人： David Livingstone , Richard Topliss , Mark Shepherd
IPC分类号： H04R17/00
CPC分类号： H04R17/00 , H04R2217/01 , H04R2499/11
摘要： A loudspeaker comprises the casing (22) of a portable electronic device, having mounted thereon a sound generating element (21) which may be a transparent cover for a display. The sound generating element (21) is driven to generate sound by a piezoelectric actuator (1) extending along a sector of a circle and coupled at one end (7) to the casing (22) by a first block (24) and at the other end (8) to the edge (26) of the sound generating element (21) by a second block (25). The first block (24) and the second block (25) each have stop surfaces spaced apart from each other and capable of engaging each other to limit the amount of relative movement of the ends (7) and (8) of the actuator (1) to prevent damage to the actuator (1). The sound generating element (21), the first and second blocks (24) and (25) and the actuator (1) form an assembly which may be manufactured for subsequent assembly to the casing (22).
摘要翻译：扬声器包括便携式电子设备的壳体（22），其上安装有可以是用于显示器的透明盖的声音产生元件（21）。声音产生元件（21）被驱动以通过沿着圆形扇区延伸的压电致动器（1）产生声音，并通过第一块（24）在一端（7）与壳体（22）耦合，并且在另一端（8）通过第二块（25）传送到发声元件（21）的边缘（26）。第一块（24）和第二块（25）各自具有彼此间隔开的能够彼此接合的止动表面，以限制致动器（1）的端部（7）和（8）的相对运动的量）以防止致动器（1）的损坏。声音产生元件（21），第一和第二块（24）和（25）和致动器（1）形成组件，该组件可以被制造用于随后组装到壳体（22）。

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