Abstract: An electronic device includes a light source, a light receiver, a first light guide structure, and a second light guide structure. The first light guide structure faces a light emitting surface of the light source and faces a lateral wall of the light receiver. The second light guide structure is disposed over the light receiver and coupled to the first light guide structure. The light receiver and the second light guide structure defines a cavity between the light receiver and the second light guide structure.

Abstract: A motor driving circuit is provided. The motor driving circuit includes an else inverter and a self inverter. The else inverter includes an else-inverter rectifier and an else-inverter driving circuit. The self inverter includes a self-inverter driving circuit and a soft-start protection circuit. The soft-start protection circuit includes a first and a second protection diodes, a self-inverter capacitor and a self-inverter soft-start circuit. The first protection diode is electrically connected to a first else-inverter-rectifier output and a first self-inverter-driving-circuit input. The second protection diode is electrically connected to a second else-inverter-rectifier output and a second self-inverter-driving-circuit output. The self-inverter soft-start circuit and the self-inverter capacitor are connected in series between a first cathode and a second anode of the first and the second protection diodes.

Abstract: A lens module comprises a barrel, a first lens, a first spacer ring, a second lens having an effective aperture A, a second spacer ring having an inner diameter B, and a third lens having an effective aperture C. The first lens, the first spacer ring, the second lens, the second spacer ring, the third lens and the infrared cut-off filter are coaxially assembled within the barrel, along an axial direction of the barrel in that order. The first spacer ring is sandwiched between the first lens and the second lens, the second spacer ring is sandwiched and located between the second lens and the third lens. The inner diameter B of the second spacer ring is smaller than the effective aperture C of the third lens and larger than the effective aperture A of the second lens, so as to satisfy the condition of C>B>A.

Abstract: An exemplary embodiment of an angling joystick includes a body, an orientation indicating unit, an imitation fishing reel and a transceiver unit. The orientation indicating unit is attached to the body and is configured for indicating an orientation of the body. The imitation fishing reel is attached to the body and includes a lever and a force-adjusting device. The lever is rotatably connected to the force-adjusting device. The transceiver unit is electrically connected to the force-adjusting device and is configured for receiving control signals. The force-adjusting device is configured for adjusting a rotating resistance to the lever according to the control signals.

Abstract: A lens module includes a lens barrel, a number of lenses, a number of opaque plates, and a filter glass. The barrel, the lenses, the opaque plates, and the filter glass all are received in the lens barrel. Each opaque plate is sandwiched between two adjacent lenses. Each lens includes an imaging portion and a non-imaging portion surrounding the imaging portion for engaging an inner sidewall of the lens barrel. The filter glass is arranged closer to an image-side of the lens module than the lens and the opaque plates. The projection of one of the opaque plates arranged closest to the filter glass, along the direction of incident light of the lens module, totally covers the non-imaging portion of the lens arranged closest to the filter glass.

Abstract: A hand-writing input system includes a hand-writing input device and an image capture device. The hand-writing input device includes a penholder, a writing head and an infrared light source. The penholder includes a writing end and an opposite top end. The writing head is arranged on the writing end. The writing head actually writes on paper, and the image capture device picks up the track of the infrared light source or the track of the target of the IR light.

Abstract: A handwriting input system includes a handwriting input device, a visible light sensing member, an infrared sensing member, and a receiving member. The handwriting input device includes a writing head and an infrared light source adjacent to the writing head. The writing head is capable of leaving color distinguishable traces on an object. The visible light sensing member is configured for capturing images of handwriting traces. The infrared sensing member is configured for capturing images of movement track of the infrared light source. The visible light sensing member and the infrared sensing member are slidably installed on the receiving member.

Abstract: A lens module includes a lens barrel, a first lens, a second lens, and a spacer. The lens barrel includes an object-side end and an image-side end opposite to the object-side end. The first lens is received in the lens barrel, and adjacent to the object-side end. The second lens is received in the lens barrel, and adjacent to the image-side end in relative to the first lens. The spacer is an annular plate, and includes an object-side surface, an image-side surface opposite to the object-side surface, and an inner sidewall. The spacer is positioned between the first lens and the second lens. The object-side surface faces the first lens, and the image-side surface faces the second lens. The intersection of the object-side surface and the inner sidewall forms a chamfer.

Abstract: A lens module includes a lens barrel, a first lens, a second lens, and a spacer. The lens barrel includes an object-side end and an image-side end opposite to the object-side end. The first lens is received in the lens barrel, and adjacent to the object-side end. The second lens is received in the lens barrel, and adjacent to the image-side end in relative to the first lens. The spacer is an annular plate, and includes an object-side surface, an image-side surface opposite to the object-side surface, and an inner sidewall. The spacer is positioned between the first lens and the second lens. The object-side surface faces the first lens, and the image-side surface faces the second lens. The intersection of the object-side surface and the inner sidewall forms a chamfer.

Abstract: A hand-writing input device includes a penholder, a writing head and an infrared light source. The penholder includes a writing end and an opposite top end. The writing head is arranged on the writing end. The writing head is capable of leaving color distinguishable traces on an object. The infrared light source is positioned on the writing end of the penholder adjacent to the writing head. The present invention also relates to a hand-writing input system using the hand-writing input device.

Abstract: A headset includes a substantially U-shaped frame, two speakers mounted at two ends of the substantially U-shaped frame, an infrared emitter, and an infrared receiver facing the infrared emitter. The infrared emitter is configured for emitting infrared light towards the infrared receiver. The infrared receiver is configured for receiving the infrared light from the infrared emitter and for generating a pause signal after the infrared light is continuously received by the infrared emitter for a first predetermined time. The headset is configured to stop working according to the pause signal.

Abstract: A portable electronic device includes a main body, a number of ball bearings, a spherical retaining member and a camera module. The main body includes a cavity formed therein, and a number of recesses formed in inner walls of the cavity and in communication with the cavity. The ball bearings are received in the respective recesses. The spherical retaining member is located in the cavity and is in contact with the ball bearings. The spherical retaining member defines a receiving space therein and an opening in communication with the receiving space. The camera module is received in the receiving space and facing the opening, the camera module is retained by the spherical retaining member in a manner such that the camera module is rotated by rotating the spherical retaining member relative to the ball bearings.

Abstract: A lens module comprises a barrel, a first lens, a first spacer ring, a second lens having an effective aperture A, a second spacer ring having an inner diameter B, and a third lens having an effective aperture C. The first lens, the first spacer ring, the second lens, the second spacer ring, the third lens and the infrared cut-off filter are coaxially assembled within the barrel, along an axial direction of the barrel in that order. The first spacer ring is sandwiched between the first lens and the second lens, the second spacer ring is sandwiched and located between the second lens and the third lens. The inner diameter B of the second spacer ring is smaller than the effective aperture C of the third lens and larger than the effective aperture A of the second lens, so as to satisfy the condition of C>B>A.

Abstract: A lens module includes a lens barrel receiving a first lens, an annular light-shielding plate, and a second lens. The first lens includes a first imaging portion and a first non-imaging portion surrounding the first imaging portion. The first non-imaging portion includes a first mounting surface and a second mounting surface opposite to the first mounting surface. The second lens includes a second imaging portion and a second non-imaging portion surrounding the second imaging portion. The second non-imaging portion includes a third mounting surface. The first mounting surface, the second mounting surface, and the third mounting surface are perpendicular to an optical axis of the lens module. The light-shielding plate is mounted between the second mounting surface and the third mounting surface and totally covers the first non-imaging portion in a projection plane perpendicular to the optical axis.

Abstract: A lens module includes a lens barrel, a first lens, a second lens, a third lens, and two spacers. The lens barrel includes an object-side end and an image-side end. The first, second, and third lenses are received in the lens barrel and arranged in that order from the object-side to the image-side. The second lens includes an object-side surface facing the object-side end and an image-side surface facing the image side end. An anti-reflection film is coated on the image-side surface of the second lens. The reflectance of the anti-reflection film to light rays having wavelength in a range from about 700 nm to about 740 nm is lower than about 2.25%.

Abstract: A lens module includes a lens barrel, a number of lenses, a number of opaque plates, and a filter glass. The barrel, the lenses, the opaque plates, and the filter glass all are received in the lens barrel. Each opaque plate is sandwiched between two adjacent lenses. Each lens includes an imaging portion and a non-imaging portion surrounding the imaging portion for engaging an inner sidewall of the lens barrel. The filter glass is arranged closer to an image-side of the lens module than the lens and the opaque plates. The projection of one of the opaque plates arranged closest to the filter glass, along the direction of incident light of the lens module, totally covers the non-imaging portion of the lens arranged closest to the filter glass.

Abstract: A lens module includes a lens barrel, a first lens, a second lens, and a spacer. The lens barrel includes an object-side end and an image-side end opposite to the object-side end. The first lens is received in the lens barrel, and adjacent to the object-side end. The second lens is received in the lens barrel, and adjacent to the image-side end in relative to the first lens. The spacer is an annular plate, and includes an object-side surface, an image-side surface opposite to the object-side surface, and an inner sidewall. The spacer is positioned between the first lens and the second lens. The object-side surface faces the first lens, and the image-side surface faces the second lens. The intersection of the object-side surface and the inner sidewall forms a chamfer.

Abstract: A lens module includes a lens barrel, a first lens, a second lens, and a spacer. The lens barrel includes an object-side end and an image-side end opposite to the object-side end. The first lens is received in the lens barrel, and adjacent to the object-side end. The second lens is received in the lens barrel, and adjacent to the image-side end in relative to the first lens. The spacer is an annular plate, and includes an object-side surface, an image-side surface opposite to the object-side surface, and an inner sidewall. The spacer is positioned between the first lens and the second lens. The object-side surface faces the first lens, and the image-side surface faces the second lens. The intersection of the object-side surface and the inner sidewall forms a chamfer.

Abstract: A lens module includes a lens barrel, a first lens, an opaque plate, and a second lens. The first lens includes an imaging portion and a non-imaging portion surrounding the imaging portion. The non-imaging portion defines an annular conic surface. The opaque plate is annular conic shaped and contacts with the annular conic surface. The second lens includes an imaging portion and a non-imaging portion surrounding the imaging portion. The object-side surface of the non-imaging portion of the second lens is step-like shaped and includes at least two step surfaces. A junction of two adjacent step surfaces abuts against the opaque plate.