Abstract: A ball screw device includes a screw engaged into a nut member for forming an endless ball guiding passage and for receiving a number of ball bearing members, a ball return device includes a U-shaped structure having a central carrying member and a protrusion extended out from each end for engaging into the nut member and for increasing the curvature of the ball return pathway of the ball return device, and a return device holder engaged with the protrusions of the ball return device for retaining the ball return device to the nut member and for preventing the ball return device from moving laterally relative to the nut member and for suitably guiding the ball bearing members to smoothly move through the endless ball guiding passages of the ball screw device.

Abstract: A method for measuring a distance D2 between two points includes following steps. A first surface of a portable electronic device is parallel to a line defined by the two points. A distance D2 between the first surface and the line is obtained. A visible light beam B1 is rotated from an initial direction substantially perpendicular with the first surface and the line to direct at the point E1. A first angle defined by the visible light beam B1 striking the point E1 and the initial direction is computed. A visible light beam B2 is rotated from an initial direction to strike the point E2. A second angle defined by the visible light beam B2 striking the point E2 and the initial direction is computed. A distance D1 is computed based on the distance D2, the first angle and the second angle. The distance D1 is outputted.

Abstract: The invention is a driving apparatus and circuit for efficiently converting a direct current (DC) signal into an alternating current (AC) signal to drive a fluorescent lamp. A semi class E configuration which utilizes only one transistor is employed in the invention. The invention comprises a power transistor, a transformer wherein a primary winding is used as a load for the power transistor and a secondary winding is used to transfer energy to the load for the driving apparatus, i.e. the CCFL tube, and control means which extracts the frequency and current of the power transistor and corrects the deviation between the frequency of the power transistor and that of the control means.

Abstract: A ball screw device includes a screw engaged into a nut member for forming an endless ball guiding passage and for receiving a number of ball bearing members, a ball return device includes a U-shaped structure having a central carrying member and a protrusion extended out from each end for engaging into the nut member and for increasing the curvature of the ball return pathway of the ball return device, and a return device holder engaged with the protrusions of the ball return device for retaining the ball return device to the nut member and for preventing the ball return device from moving laterally relative to the nut member and for suitably guiding the ball bearing members to smoothly move through the endless ball guiding passages of the ball screw device.

Abstract: A mobile communication system includes a headphone and a mobile communication terminal. The headphone includes a signal transceiver, an audio transducer, and a detection module. The signal transceiver is configured for communicating with the mobile communication terminal. The audio transducer is electrically connected to the signal transceiver and comprises a microphone and a speaker. The detection module is configured for detecting movements of the headphone to produce a plurality of detection signals accordingly. The mobile communication terminal includes a transceiver module and a communication module. The transceiver module is configured for communicating with the signal transceiver. The communication module is configured for answering/rejecting an incoming call or terminating an active communication according to the detection signals.

Abstract: An electronic includes a memory, a photosensitive element, and a processing element. The photosensitive element receives light beams and generating trigger signals when intensity of the received light beams reach a predetermined value. The processing element electrically connected to the photosensitive element and the memory, counts a number of disassembly times of the electronic device according to the times the trigger signals have been generated by the photosensitive element and stores the number in the memory.

Abstract: A mobile communication device capable of communicating with a remote communication device includes a communication unit, a microphone, an input unit, a control unit, and a switching unit. The communication unit is used for generating a remote audio signal according to remote audio information received from the remote communication device. The microphone is used for generating a local audio signal according to a local sound. The input unit is used for receiving a trigger signal. The control unit is configured for generating a switching signal in response to the trigger signal. The switching unit is configured for transmitting the remote and local audio signals to the remote communication device via the communication unit alternately according to the switching signal.

Abstract: A mobile communicating terminal includes a primary transducer, a secondary transducer and a controlling unit. The primary transducer is used for outputting audible sounds in the normal mode. The secondary transducer is used for outputting audible sounds in the hands-free mode, whose output power is different from the primary transducer. The controlling unit is used for automatically changing the mobile communicating terminal between the normal mode and the hands-free mode according to a current reflection distance and a predetermined reflection distance. A method for switching the mobile communicating terminal between the normal mode and the hands-free mode is also provided.

Abstract: An apparatus for inducing sleep includes an audio generator, a signal generator, and a signal processor. The audio generator generates audio signals. The signal generator generates electrical signals with a frequency between 0.4 HZ to 4 HZ. The signal processor adjusts amplitudes of the audio signals according to the frequency, and outputs the adjusted audio signals.

Abstract: The present invention is directed to an apparatus that drives a lighting system with multiple lamps. A phase shift mechanism is produced either by a digital method, an analog method, or a mixture of the two methods. In a digital method, phase shifts are generated by digital circuits comprising counters, a divider, an adder, and a comparator. The digital circuits analyze the signal and use the necessary information to form a series of phased driving signals. In an analog method, phase shifts are generated by analog circuits comprising ramp waveform generators, comparators, and at least one shot generator. Also, an apparatus for driving a lighting system with multiple lamps can be realized by mixing the two methods mentioned above.

Abstract: The present invention is directed to an apparatus that drives a lighting system with multiple lamps. A phase shift mechanism is produced either by a digital method, an analog method, or a mixture of the two methods. In a digital method, phase shifts are generated by digital circuits comprising counters, a divider, an adder, and a comparator. The digital circuits analyze the signal and use the necessary information to form a series of phased driving signals. In an analog method, phase shifts are generated by analog circuits comprising ramp waveform generators, comparators, and at least one shot generator. Also, an apparatus for driving a lighting system with multiple lamps can be realized by mixing the two methods mentioned above.

Abstract: A method for measuring a distance D2 between two points includes following steps. A first surface of a portable electronic device is parallel to a line defined by the two points. A distance D2 between the first surface and the line is obtained. A visible light beam B1 is rotated from an initial direction substantially perpendicular with the first surface and the line to direct at the point E1. A first angle defined by the visible light beam B1 striking the point E1 and the initial direction is computed. A visible light beam B2 is rotated from an initial direction to strike the point E2. A second angle defined by the visible light beam B2 striking the point E2and the initial direction is computed. A distance D1 is computed based on the distance D2, the first angle and the second angle. The distance D1 is outputted.

Abstract: A preload structure for a ball screw in the inner surface of a nut is formed a helical groove whose lead is different from the lead of the adjacent helical groove to produce a lead deviation between the helical groove of the nut and the helical groove of the screw. By such arrangements, the lead deviation can be used to achieve the preload objective, thus reducing the fitting number demanded of the circulation system. Consequently, not only the single circulation system fittings can be used, but also the length of the nut is shorter and without extra machining, and the producer only needs to control the deviation of the interval helical track during rubbing to achieve various preload changes.

Abstract: The invention is a driving apparatus and circuit for efficiently converting a direct current (DC) signal into an alternating current (AC) signal to drive a fluorescent lamp. A semi class E configuration which utilizes only one transistor is employed in the invention. The invention comprises a power transistor, a transformer wherein a primary winding is used as a load for the power transistor and a secondary winding is used to transfer energy to the load for the driving apparatus, i.e. the CCFL tube, and control means which extracts the frequency and current of the power transistor and corrects the deviation between the frequency of the power transistor and that of the control means.

Abstract: An inverter has an inductor, a capacitor, a switching device, a driving circuit and a transformer. A first terminal of the capacitor is connected to the inductor, and the switching device is connected between the first terminal of the capacitor and a ground terminal. The driving circuit is connected to the switching device, wherein the driving circuit is arranged to control the switching device to turn on or turn off; and a primary side of the transformer is connected between a second terminal of the capacitor and the ground terminal.

Abstract: A mold structure includes an ejecting tube disposed movably within a guide hole in a lower mold unit and having an ejecting end. The ejecting tube is communicated with an air chamber in the lower mold unit and a mold cavity. A pneumatic device is operable to draw air from the mold cavity into the ejecting tube. The ejecting tube is operable to move within the guide hole between a retracted position whereat the ejecting end is disposed outwardly of the mold cavity, and an ejecting position whereat the ejecting end is moved into the mold cavity so as to allow a molded product to be removed from the lower mold unit. The pneumatic device is also operable to introduce compressed air therefrom into the mold cavity via the air chamber and the ejecting tube.

Abstract: A lamp driving device has a pulse width modulation circuit, a phase splitter and several switching circuits. The pulse width modulation circuit is arranged to generate a pulse width modulation signal. The phase splitter is coupled to the pulse width modulation circuit and arranged to split the pulse width modulation signal into several phased signals having different phases, wherein pulses of each phased signal are non-overlapping with those of another phased signal. The switching circuits are coupled to the phase splitter and are arranged to respectively receive one of the phased signals, wherein each switching circuit is controlled by the received phased signal.

Abstract: The invention is a driving apparatus and circuit for efficiently converting a direct current (DC) signal into an alternating current (AC) signal to drive a fluorescent lamp. A semi class E configuration which utilizes only one transistor is employed in the invention. The invention comprises a power transistor, a transformer wherein a primary winding is used as a load for the power transistor and a secondary winding is used to transfer energy to the load for the driving apparatus, i.e. the CCFL tube, and control means which extracts the frequency and current of the power transistor and corrects the deviation between the frequency of the power transistor and that of the control means.

Abstract: A hand-eye coordination test instrument includes at least a control device located in the test instrument, a LED stimulus array located on the surface of the test instrument and an input device. An operator can transmit test signals to the LED stimulus array through the control device. A testee receives reactions and sends them back through the input device to the test instrument. Through the control device the operator can judge and evaluate the hand-eye coordination condition of the testee.

Abstract: A preload structure for a ball screw in the inner surface of a nut is formed a helical groove whose lead is different from the lead of the adjacent helical groove to produce a lead deviation between the helical groove of the nut and the helical groove of the screw. By such arrangements, the lead deviation can be used to achieve the preload objective, thus reducing the fitting number demanded of the circulation system. Consequently, not only the single circulation system fittings can be used, but also the length of the nut is shorter and without extra machining, and the producer only needs to control the deviation of the interval helical track during rubbing to achieve various preload changes.