Abstract: An exemplary Fresnel lens includes a flat emitting surface and a plurality of annular Fresnel lens elements at an opposite side thereof to the emitting surface. Each of the Fresnel lens elements has a non-lens surface perpendicular to the emitting surface and a Fresnel lens surface adjoining the non-lens surface with an acute angle. Each of the Fresnel lens elements has a plurality of spaced cavities defined in the non-lens surface.

Abstract: An inrush limiting circuit is connected between an external power source and a plurality of capacitors, and includes a delay trigger signal generator, a plurality of reversing circuits and a plurality of transmission gates. The delay trigger signal generator is connected to the external power source, to receive external power signals and generate a plurality of delay trigger signals. The reversing circuits are connected to the delay trigger signal generator, to reverse the delay trigger signals and output a plurality of the reversed delay trigger signals. The transmission gates are correspondingly connected to the delay trigger signal generator, the reversing circuits and the capacitors, to turn on respectively at different times based on the delay trigger signals and the reversed delay trigger signals, to cause the external power source to charge the capacitors at the different times so as to avoid an inrush current.

Abstract: A first sub-lens having two opposite first surfaces is provided. One of the first surfaces has a central bulged first optical surface for refracting light rays passing therethrough and defining a first optical axis. The other first surface defines a recess that defines a flat bottom surface. A second sub-lens having two opposite second surfaces is provided. One of the second surfaces has a central bulged second optical surface for refracting light rays passing therethrough and defining a second optical axis. The other second surface is flat and substantially similar to the bottom surface of the first sub-lens in shape and size and is glued to the bottom surface of the first sub-lens in a manner that the first axis is coaxial with the second axis.

Abstract: An exemplary lens actuator includes a lens barrel, a coil wrapped around the lens barrel, a plurality of magnets, a bracket, and a first resilient plate. The lens barrel includes a main body and a plurality of first positioning pins protruding out from the main body. The first resilient plate includes an outer frame, an inner frame substantially coaxial with the outer frame, and a plurality of spring portions interconnected between the outer frame and the inner frame. A fixed panel is mounted on the first side of the bracket. The outer frame of the first resilient plate is fixed on one portion of the fixed panel. The inner frame of the first resilient plate is fixed on the lens barrel. The first positioning pins extend through the inner frame of the first resilient plate and resist on another portion of the fixed panel.

Abstract: A shutter includes a first light-pervious electrode, a second light-pervious electrode, a light-shielding layer sandwiched between the first and second light-pervious electrodes and a voltage supplying system. The light-shielding layer is comprised of an electrostrictive material. The light-shielding layer has a fixed end positioned adjacent to one edge of the first light-pervious electrode, and a free end facing toward the opposite edge. The free end is extendable towards the opposite edge of the first light-pervious electrode to block light from in response to a voltage applied to the light-shielding layer. The voltage supplying system is electrically connected with the first and second light-pervious electrodes for supplying a voltage between the first and second light-pervious electrodes.

Abstract: An exemplary method for manufacturing an infrared (IR) cut-off filter coated lens array includes: providing a light pervious panel having a first surface and a second surface at opposite sides thereof; forming an infrared cut-off filter film on the first surface of the light pervious panel; and forming a plurality of discrete lens structures on the second surface of the light pervious panel through a photolithography process.

Abstract: A communication device includes a first printed circuit board (PCB), a second PCB disposed parallel to the first PCB, a first shielding cage and a second shielding cage. The first and second shielding cages are fixed to the first and second PCBs and define at lease one first and second receiving space to receive at least one transceiver modules, respectively. The first and second shielding cages include at least one first and second retaining tabs, respectively. Each of the transceiver modules received in the first and second shielding cages includes a release mechanism configured with a release portion and a trigger. The release portions can match one corresponding first and second retaining tabs to release the corresponding transceiver module. The triggers are disposed on one side of the transceiver modules close to the first and the second PCBs.

Abstract: A heat dissipating system includes a chassis, a motherboard mounted in the chassis, a number of connectors mounted on the motherboard in parallel to form a passage between every two adjacent connectors, and a heat dissipating element mounted to the chassis and aligned with the passages. Each of the connectors includes a socket and an inserting portion. The socket defines a slot. The inserting portion includes a main body and a protrusion extending from the main body towards the slot. A cross-section of the protrusion is trapezoidal-shaped. A side surface of the protrusion is inclined to form an airflow guiding structure.

Abstract: An exemplary lens driving apparatus includes a first retaining frame having first retaining portions, first coils of wire received in the first retaining portions, and a voice coil motor movably received in the first retaining frame. The voice coil motor includes a second retaining frame having second retaining portions, magnets received in the second retaining portions, and a core member having a second coil of wire wound around and being movably received in the second frame. The core member receives lens therein. The magnets generate magnetic fields which are capable of driving the core member to move along the lens optical axis when the second coil of wire is electrically powered; the magnets are applied reverse force of Ampere's force when the first coils of wire are electrically powered, such that the voice coil motor together with the lens is moved in a plane perpendicular to the lens optical axis.

Abstract: An exemplary light emitting diode (LED) assembly includes a cover, a substrate, a LED unit, a first electrode terminal, and a second electrode terminal. The substrate includes a first surface and a second surface on an opposite side of the substrate thereto. The substrate and the cover cooperatively define a cavity. The LED unit is received in the cavity. The first and the second electrode terminals extend from the second surface. The first electrode terminal is electrically connected to one of a positive lead and a negative lead of the LED unit and the second electrode terminal is electrically connected to the other. The second electrode terminal includes a first electrode portion and a second electrode portion symmetrically arranged at opposite sides of the first electrode terminal. The first and the second electrode portions are at least partially symmetrical with respect to the first electrode terminal.

Abstract: A package structure of a compound semiconductor device comprises a thin film substrate, a die, at least one metal wire and a transparent encapsulation material. The thin film substrate comprises a first conductive film, a second conductive film, and an insulating dielectric material. The die is mounted on the surface of the first conductive film, and is electrically connected to the first conductive film and the second conductive film through the metal wire. The transparent encapsulation material overlays the first conductive film, second conductive film, and die. The surfaces of the first conductive film and second conductive film which is opposite the transparent encapsulation material act as electrodes. The insulating dielectric material is between the first conductive film and second conductive film.

Abstract: A positioning system and method for focusing a charge coupled device (CCD) lens on a selected surface of an object to be measured is provided. The positioning system and method moves the CCD lens downwards to approximate an estimate Z-axis coordinate of the CCD lens, and moves the CCD lens upwards to find an accurate Z-axis coordinate of the CCD lens according to the selected surface of the object. The system and method further moves the CCD lens to a position corresponding to the accurate Z-axis coordinate to focus the CCD lens on the selected surface.

Abstract: An exemplary lens module includes a barrel and a first lens. The barrel includes a cylindrical sidewall. The sidewall defines an accommodating space therein and has an opening defined therein. The opening communicates with the accommodating space. The first lens is received in the accommodating space of the barrel. The first lens has a first adjusting notch defined at a periphery thereof. The first adjusting notch is exposed at the opening of the barrel.

Abstract: A shutter for a micro camera module includes a substrate made from silicon wafer and a light absorbing layer covering the surface.

Abstract: An electrophoretic display includes a display panel and a scanning device. The display panel includes a magnetic rotating ball layer and a soft magnetic layer. The magnetic rotating ball layer includes a plurality of magnetic rotating balls. Two magnetic poles of each magnetic rotating ball have white and black colors respectively. The soft magnetic layer includes a plurality of soft magnetic bodies each facing at least one of the rotatable magnetic rotating balls. The scanning device is movably attached to the display panel and includes a plurality of electromagnets facing the soft magnetic layer. The electromagnets are spatially corresponding to a row of the soft magnetic bodies. Each electromagnet magnetize corresponding one soft magnetic body when the electromagnets are moved along the display panel. Each magnetic rotating ball corresponding to one soft magnetic body is driven by one soft magnetic body to display white or black colors.

Abstract: A camera module includes a barrel unit, an image sensing unit, and a voice coil motor. The image sensing unit has an image sensing surface. The barrel unit defines an optical axis. A first projection boundary is formed on the projection plane by projecting a boundary of the image sensing surface along the optical axis. A second projection boundary is formed on the projection plane by projecting a boundary of the receiving space of the movable part along the optical axis. The voice coil motor includes a hollow fixed part, a movable part, and a base. The base includes a shielding part and a through hole defined in the shielding part. A third projection boundary is formed on the projection plane by projecting a boundary of the through hole of the shielding part. The third projection boundary lies between the first and the second boundaries.

Abstract: A light emitting diode comprises a substrate having a first surface and a second surface, a light emitting epitaxy structure placed on the first surface of the substrate, and a compound reflection layer placed on the second surface of the substrate. The second surface of the substrate further has a protection structure.

Abstract: An exemplary apparatus for coupling a first lens to a second lens includes a base, a first plate, a second plate, a recess, and an elastic member. The base has a top surface. The first plate protrudes from the top surface. The second plate is opposite to the first plate and protrudes from the top surface. The recess is defined in the top surface and positioned between the first plate and the second plate. The recess is configured for receiving the second lens. The elastic member is positioned on the top surface. A first end of the elastic member is connected with the first plate. The elastic member is configured for exerting a force on the first lens such that the first lens can be cooperatively clamped between a second end of the elastic member and the second plate.

Abstract: An exemplary lens module includes an electromagnetic shutter, an electromagnetic motor and a magnetic field barrier sandwiched between the electromagnetic shutter and the electromagnetic motor. The electromagnetic shutter is configured for generating a first magnetic field. The electromagnetic motor is configured for generating a second magnetic field. The magnetic field barrier is configured for preventing the first magnetic field and the second magnetic field from penetrating therethrough.

Abstract: An electrical connector for engaging with a mated connector in a mating direction comprises a dielectric housing receiving a number of contacts therein, and a pair of retention members for securely fixing the connector to a circuit board. The housing forms a pair of latching members outwardly projecting from opposite ends thereof for securely receiving the retention members therein. Each latching member forms a recess and a projection integrally extending into the recess. Each retention member is L-shaped and comprises a latching portion having a width substantially equal to the width of the corresponding recess for being secured received therein, and a mounting portion perpendicular to the latching portion and extending beyond the corresponding latching member for being surface mounted to the circuit board.