Abstract: The shutter device includes a base, a post, a coil, a shutter, a first magnetic member, and a second magnetic member. The base defines a first aperture. The post is fixedly mounted on the base. The coil is connected to the post and rotatable around the post. The shutter blade is coupled to the post and jointly rotatable with the coil. The first and second magnetic members are mounted on the base arranged on two sides of the coil. The first and second magnetic members are configured for driving the coil to rotate, thereby moving the shutter blade to selectively expose or cover the first aperture.

Abstract: A voice coil motor includes a base, a shell, first and second magnetic members, a lens retainer, a coil of wire mounted on the retainer, first and second elastic members. The base includes a bottom and posts extending upwards from the bottom. The shell includes a top and sidewalls cooperatively defining a receiving space therein. The shell is mounted on the base with the posts being received in the receiving space. The first magnetic members are positioned on the bottom of the base, the second magnetic members are positioned on the top of the shell, and each two adjacent of the posts have one of the first magnetic members and one of the second magnetic members located therebetween. The first resilient member and a second resilient member each include fixing portions fixed to the posts, and a spring portion connected to retainer between the first and second magnetic members.

Abstract: The shutter device includes a base, a post, a coil, a shutter, a first magnetic member, and a second magnetic member. The base defines a first aperture. The post is fixedly mounted on the base. The coil is connected to the post and rotatable around the post. The shutter blade is coupled to the post and jointly rotatable with the coil. The first and second magnetic members are mounted on the base arranged on two sides of the coil. The first and second magnetic members are configured for driving the coil to rotate, thereby moving the shutter blade to selectively expose or cover the the first aperture.

Abstract: An ultrasonic wave generator includes an ultrasound generating assembly, a power supply and a controller. The ultrasound generating assembly includes a thermoacoustic film comprising a carbon nanotube film, a first electrode and a second electrode. The first and second electrodes are connected to opposite ends of the thermoacoustic film. The power supply is configured for powering the ultrasound generating assembly. The controller electrically is coupled to the power supply and configured for alternately powering on and off the ultrasound generating assembly at a frequency of at least 20 kHz.

Abstract: An exemplary piezoelectric driving module includes a movable barrel, a fixed barrel receiving the movable barrel, a piezoelectric actuator, and a spring member. The piezoelectric actuator is configured for moving the movable barrel relative to the fixed barrel. The piezoelectric actuator includes a piezoelectric body mounted on the sidewall of the fixed barrel and a friction member mounted on the piezoelectric body. The piezoelectric body is configured for driving the friction member to generate elliptical vibration. The friction member is in frictional contact with the movable barrel. The spring member connects the movable barrel to the fixed barrel. The spring member is configured for providing an resilient force to make the movable barrel be in frictional contact with the friction member such that the friction member can be driven by the piezoelectric body to move the movable barrel along the central axis of the fixed barrel.

Abstract: A camera module includes a substrate, a lens module, a driver circuit and a electromagnetic interference shield. The substrate includes a first surface and a second surface opposite to the first surface, and the lens module is positioned on the first surface of the substrate. The driver circuit is positioned on the first surface of the substrate, and is electrically connected to the lens module. The electromagnetic interference shield is positioned on the first surface of the substrate and covers the driver circuit. The electromagnetic interference shield includes a case and pins. The case covers the driver circuit. The pins extend from the case and pass through the substrate to secure the electromagnetic interference shield on the substrate.

Abstract: A camera includes a lens module, an image sensor, and a shutter module. The centers of the image sensor and the shutter module are on an optical axis of the lens module. The shutter module includes a frame and an electroactive telescopic unit having a first electroactive polymer layer, two compliant electrode layers, and two second electroactive polymer layers. The center of the electroactive telescopic unit has a through hole through the first electroactive polymer layer, the two compliant electrode layers, and the two second electroactive polymer layers. A central axis of the through hole and the optic axis of the lens module are coaxial. The electroactive telescopic unit is contractible or expandable along a direction perpendicularly to the optic axis of the lens module in response to a change in a voltage applied between the two compliant electrode layers.

Abstract: A nanogenerator includes a first frame, a second frame, a first conductor, a second conductor, an array of nano-rods, and an array of electrodes. The second frame engages the first frame. The first conductor is fixed to a first inner surface of the first frame facing the second frame. The second conductor is fixed to a second inner surface of the second frame facing the first frame. The array of nano-rods extends from a first surface of the first conductor toward the second frame. The array of electrodes extends from a second surface of the second conductor toward the first frame. The array of electrodes corresponds to the array of nano-rods. The hardness of the array of electrodes is being greater than that of the array of nano-rods.

Abstract: A hydrogen sensor includes a substrate, a hydrogen absorbing member, a power source, an ammeter, and a processing unit. The hydrogen absorbing member is positioned on the substrate, and includes a carbon nanotube yarn and a hydrogen absorbing film coated on the carbon nanotube yarn. The ammeter measures an electric current. The hydrogen absorbing member and the ammeter are connected in series to the power source. The processing unit is electrically coupled to the ammeter to obtain a hydrogen concentration according to the electric current.

Abstract: An exemplary shutter device includes a base having an aperture defined therein, a shaft mounted on the base, a magnetic element, a shutter blade, a first wire coil and a second wire coil. The magnetic element is connected to the shaft and rotatable around the shaft. The shutter blade is coupled to the shaft and jointly rotatable with the magnetic element. The first wire coil and the second wire coil are mounted on the base arranged on two sides of the magnetic element. The first and second wire coils are configured for driving the magnetic element to rotate, thereby moving the shutter blade to selectively expose the aperture or cover the aperture.

Abstract: A keyboard includes a cover, a base facing and contacting the cover, at least one key, and a micro-electro-mechanical sensor (MEMS) module. The base and the cover define a space for receiving the MEMS module. The at least one key is movably formed on the cover. The MEMS module is sandwiched between the base and the cover and includes a bag, a connecting tube, and a sensor. The bag is resisted with the at least one key. The connecting tube is connected to the bag at one end and communicates with the bag. The sensor is connected to the other end of the connecting tube and communicated with the bag via the connecting tube to generate pressure signals according to a pressure from the key to the bag.

Abstract: A motion controller includes a handle and a MEMS pressure sensing module. The handle has an output interface circuit for coupling with a terminal electronic device. The MEMS pressure sensing module includes a compressible member mounted on the handle, a MEMS sensor for sensing a pressure applied on the compressible member and converting the pressure into electronic signals, a processing unit for calculating a value of the pressure according to the electronic signals, and a power supply unit for supplying power to the processing unit. The processing unit is connected with the output interface circuit such that a user is able to obtain the pressure value from the terminal electronic apparatus.

Abstract: A game drum includes a drum body, a compressible member and a MEMS pressure sensing module. The drum body includes an output interface circuit for coupling with a terminal electronic device. The compressible member is accommodated in the accommodating room of the drum body. The MEMS pressure sensing module includes a MEMS sensor, located under the compressible member, for sensing a pressure applied on the compressible member and converting the pressure values into electronic signals, a processing unit for calculating a value of the pressure according to the electronic signals, and a power supply unit for supplying power to the processing unit and the transmitting unit. The processing unit is connected with the output interface circuit such that a user is able to obtain the pressure value from the terminal electronic apparatus.

Abstract: An exemplary image stabilizing camera system includes a camera module. The camera module includes a movable AF unit, a frame having a receiving cavity defined therein, an electromagnetic driving unit, and an elastic member. The receiving cavity is configured for receiving the movable AF unit therein. The electromagnetic driving unit is configured for driving the movable AF unit to move relative to the frame so as to counteract movement of the object relative to the system such that the system can, after a shake of the system, capture a stabilized image of the object which is substantially identical with an image thereof captured without the shake of the system. The elastic member is disposed on a top end of the movable AF unit. The elastic member is configured for connecting the movable AF unit to the frame, thereby suspending the movable AF unit in the receiving cavity.

Abstract: A detection module includes MEMS force sensors, a processing unit, and a power supply unit. The MEMS force sensors are adapted to detect data values of forces that applied on corresponding measured points and output corresponding digital signals. The processing unit is adapted to receive and process the digital signals from the MEMS force sensors, and the power supply unit provides power to the processing unit.

Abstract: An actuator includes a first barrel, a second barrel, a first magnetic portion, a second magnetic portion and a plurality of springs. The second barrel is received in the first barrel. The first magnetic portion and the second magnetic portion are arranged between the first barrel and the second barrel. The first magnetic portion is fixed to the first barrel. The second magnetic portion is fixed to the second barrel. The first magnetic portion is opposite to the second magnetic portion. The first and second magnetic portions cooperatively drive the second barrel to move in the first barrel on the plane perpendicular to a central axis of the first barrel. The springs are elastically connected to the first barrel and to the second barrel, to provide a restoring force between the first barrel and the second barrel when the first barrel is not coaxial with the second barrel.

Abstract: A moveable assembly includes a frame, resilient suspension arms made of carbon nanotube bundles, and a moveable member. The frame is disposed around the moveable member. Each of the resilient suspension arms includes a first end fixed to the frame, and a second end connected to the moveable member. The resilient suspension arms are centro-symmetrically arranged relative to the moveable member such that the moveable member is capable of stably moving along a predetermined direction driven by an external force.

Abstract: An exemplary piezoelectric driving module includes a movable barrel, a fixed barrel receiving the movable barrel, a piezoelectric actuator, and a spring member. The piezoelectric actuator is configured for moving the movable barrel relative to the fixed barrel. The piezoelectric actuator includes a piezoelectric body mounted on the sidewall of the fixed barrel and a friction member mounted on the piezoelectric body. The piezoelectric body is configured for driving the friction member to generate elliptical vibration. The friction member is in frictional contact with the movable barrel. The spring member connects the movable barrel to the fixed barrel. The spring member is configured for providing an resilient force to make the movable barrel be in frictional contact with the friction member such that the friction member can be driven by the piezoelectric body to move the movable barrel along the central axis of the fixed barrel.

Abstract: A voice coil motor includes a base, a shell, first and second magnetic members, a lens retainer, a coil of wire mounted on the retainer, first and second elastic members. The base includes a bottom and posts extending upwards from the bottom. The shell includes a top and sidewalls cooperatively defining a receiving space therein. The shell is mounted on the base with the posts being received in the receiving space. The first magnetic members are positioned on the bottom of the base, the second magnetic members are positioned on the top of the shell, and each two adjacent of the posts have one of the first magnetic members and one of the second magnetic members located therebetween. The first resilient member and a second resilient member each include fixing portions fixed to the posts, and a spring portion connected to retainer between the first and second magnetic members.

Abstract: Voice coil motor includes a housing shell, a fixing member, a movable member and elastic members. The fixing member includes a bracket and a number of first magnetic members retained on the bracket. The movable member includes a retainer and a number of second magnetic members mounted thereon. One of the first or the second magnetic member includes a first permanent magnet and a second permanent magnet abutting against the first permanent magnet, with each of the first and second permanent magnets including an N polarity side and an S polarity side. A pair of the first and second permanent magnets facing the same other one of the first and second magnetic members with only the N polarity side of the first permanent magnet and only the S polarity side of the second permanent magnet facing the same the other one of the first and second magnetic member.