Abstract: A control device and an associated method for driving a multi-function speaker supporting a plurality of predetermined functions including at least an audio function and a non-audio function includes a digital signal mixing block and a digital-to-analog block. The digital signal mixing block is arranged for receiving a plurality of digital input signals corresponding to the predetermined functions, respectively, and generating a digital mixed signal according to the digital input signals. The digital-to-analog block is coupled to the digital signal mixing block, for generating an analog driving signal to the multi-function speaker according to the digital mixed signal.

Abstract: An electronic device includes an impedance detection circuit and a processor. The impedance detection circuit is configured for receiving a test signal, processing the test signal and detecting an impedance of a headphone speaker load by using the test signal to generate a detection result. The processor is coupled to the impedance detection circuit and configured for providing the test signal to the impedance detection circuit, receiving the detection result from the impedance detection circuit, and adjusting a voltage of an audio signal to be provided to the headphone speaker load according to the detection result.

Abstract: A power supply circuit for receiving an input voltage and outputting a driving voltage to at least one LED string. The power supply circuit includes a rear-stage converting circuit and a control circuit. The rear-stage converting circuit is used for receiving the input voltage and converting the input voltage into a compensating voltage. The control circuit is connected to the rear-stage converting circuit and the LED string for detecting the magnitude of a current passing through the LED string, thereby controlling the current passing through the LED string to be identical. The driving voltage is outputted from the power supply circuit. The driving voltage is a summation of the input voltage and the compensating voltage.

Abstract: A control device and an associated method for driving a multi-function speaker supporting a plurality of predetermined functions including at least an audio function and a non-audio function includes a digital signal mixing block and a digital-to-analog block. The digital signal mixing block is arranged for receiving a plurality of digital input signals corresponding to the predetermined functions, respectively, and generating a digital mixed signal according to the digital input signals. The digital-to-analog block is coupled to the digital signal mixing block, for generating an analog driving signal to the multi-function speaker according to the digital mixed signal.

Abstract: A tensioner includes a base, a piston, a rack, a stopping device, a first and a second flexible device. The surface of the base includes a first, a second, a third, and a fourth recess portion vertically connecting the third with the second recess portion. The rack disposed in the second recess portion has one ending outside the base to extend and connect to one ending of the piston. The stopping device axially disposed in the fourth recess portion has a work surface and a first connecting surface disposed on sides of two endings thereof. Two sticking portions are disposed on opposite edges of the first connecting surface. A turning mechanism is disposed on the ending of stopping device, which has the sticking portions. The second flexible device disposed in the third recess portion contacts the ending of stopping device, where the work surface is disposed.

Abstract: A LED current-controlling circuit includes a first magnetic amplifier, a first current detecting circuit, a first magnetic amplifier controller and a first diode. The first magnetic amplifier is connected to an input terminal of the LED current-controlling circuit and the first LED string. The first current detecting circuit is connected to the first LED string in series for detecting the first current flowing through the first LED string. The first magnetic amplifier controller is used for controlling on/off statuses of the first magnetic amplifier. The first diode is connected to an output terminal of the first magnetic amplifier, the first LED string and the first magnetic amplifier controller. The first magnetic amplifier controller controls on/off statuses of the first magnetic amplifier according to the magnitude of the first current, thereby maintaining the first current at a specified DC current level.

Abstract: A brightness-adjustable LED driving circuit includes a rectifying and filtering circuit, a power factor correction power conversion circuit, and a detecting and controlling circuit. The rectifying and filtering circuit is used for filtering and rectifying a brightness adjusting voltage into a first DC voltage. The power factor correction power conversion circuit is electrically connected to the rectifying and filtering circuit and at least one LED string for generating an output current required for powering the at least one LED string. The detecting and controlling circuit detects phase data of the brightness adjusting voltage and the output current generated by the power factor correction power conversion circuit. The detecting and controlling circuit generates a control signal to the power factor correction controller according to the phase data of the brightness adjusting voltage, so that the magnitude of the output current is changed according to the phase data of the brightness adjusting voltage.

Abstract: A sliding-type portable electronic device comprises a first body; a second body, a sliding mechanism and a rotating component. The sliding mechanism is secured on the second body and slidably assembled on the first body. The rotating component is rotatably assembled in the first body. The sliding mechanism slides in the first body and hits the rotating component. The sliding mechanism can hit the rotating component to make a silvery sound, thereby enhancing entertainment and personalization of the portable electronic device.

Abstract: A power supply circuit for receiving an input voltage and outputting a driving voltage to at least one LED string. The power supply circuit includes a rear-stage converting circuit and a control circuit. The rear-stage converting circuit is used for receiving the input voltage and converting the input voltage into a compensating voltage. The control circuit is connected to the rear-stage converting circuit and the LED string for detecting the magnitude of a current passing through the LED string, thereby controlling the current passing through the LED string to be identical. The driving voltage is outputted from the power supply circuit. The driving voltage is a summation of the input voltage and the compensating voltage.

Abstract: A sliding-type portable electronic device comprises a first body; a second body, a sliding mechanism and a rotating component. The sliding mechanism is secured on the second body and slidably assembled on the first body. The rotating component is rotatably assembled in the first body. The sliding mechanism slides in the first body and hits the rotating component. The sliding mechanism can hit the rotating component to make a silvery sound, thereby enhancing entertainment and personalization of the portable electronic device.

Abstract: A tensioner includes a base, a piston, a rack, a stopping device, a first and a second flexible device. The surface of the base includes a first, a second, a third, and a fourth recess portion vertically connecting the third with the S second recess portion. The rack disposed in the second recess portion has one ending outside the base to extend and connect to one ending of the piston. The stopping device axially disposed in the fourth recess portion has a work surface and a first connecting surface disposed on sides of two endings thereof. Two sticking portions are disposed on opposite edges of the first connecting surface. A turning mechanism is disposed on the ending of stopping device, which has the sticking portions. The second flexible device disposed in the third recess portion contacts the ending of stopping device, where the work surface is disposed.

Abstract: A LED current-controlling circuit includes a first magnetic amplifier, a first current detecting circuit, a first magnetic amplifier controller and a first diode. The first magnetic amplifier is connected to an input terminal of the LED current-controlling circuit and the first LED string. The first current detecting circuit is connected to the first LED string in series for detecting the first current flowing through the first LED string. The first magnetic amplifier controller is used for controlling on/off statuses of the first magnetic amplifier. The first diode is connected to an output terminal of the first magnetic amplifier, the first LED string and the first magnetic amplifier controller. The first magnetic amplifier controller controls on/off statuses of the first magnetic amplifier according to the magnitude of the first current, thereby maintaining the first current at a specified DC current level.

Abstract: A brightness-adjustable LED driving circuit includes a rectifying and filtering circuit, a power factor correction power conversion circuit, and a detecting and controlling circuit. The rectifying and filtering circuit is used for filtering and rectifying a brightness adjusting voltage into a first DC voltage. The power factor correction power conversion circuit is electrically connected to the rectifying and filtering circuit and at least one LED string for generating an output current required for powering the at least one LED string. The detecting and controlling circuit detects phase data of the brightness adjusting voltage and the output current generated by the power factor correction power conversion circuit. The detecting and controlling circuit generates a control signal to the power factor correction controller according to the phase data of the brightness adjusting voltage, so that the magnitude of the output current is changed according to the phase data of the brightness adjusting voltage.

Abstract: The present invention provides a power supply circuit for driving multiple sets of DC loads. The power supply circuit includes a current providing circuit, a sharing circuit and a current control unit. The current providing circuit receives and regulates a supply voltage into specified output currents to be supplied to the multiple sets of DC loads. The sharing circuit is connected in series with output terminals of the current providing circuit and the multiple sets of DC loads. The sharing circuit includes at least one coupling inductor member for performing equal current sharing among the multiple sets of DC loads. The current control unit is connected to the current providing circuit and the multiple sets of DC loads for detecting magnitudes of the current passing through the multiple sets of DC loads and controlling the output currents from the current providing circuit.

Abstract: The present invention relates to a driving circuit for driving one or multiple LED chip sets. The driving circuit includes a power converting circuit, one or multiple switching elements, and a controller. The power converting circuit is electrically connected to the one or multiple LED chip sets for receiving an input power and converting the input power into a regulated output voltage or current required for illuminating the one or multiple LED chip sets. The one or multiple switching elements electrically connected to the one or multiple LED chip sets. The controller is electrically connected to the switching elements for controlling alternate or combined simultaneous/alternate switching on/off statuses of the one or multiple switching elements, so that the one or multiple LED chip sets emit light in an alternate lighting manner or a combined simultaneous/alternate lighting manner to reduce the operating temperatures of the one or multiple LED chip sets.

Abstract: The present invention relates to a LED module with a reduced operating temperature. The LED module includes a substrate, a plurality of LED chips, a carrier and an encapsulant layer. These LED chips are disposed on the substrate and electrically connected to the substrate and are divided into a first LED chip set and a second LED chip set. The carrier is coupled to the substrate and has a driving circuit. The driving circuit is electrically connected to the plurality of LED chips for driving operations of the plurality of LED chips. The first LED chip set and the second LED chip set emit light in an alternate lighting manner or in a combined simultaneous/alternate lighting manner so as to reduce the operating temperature of the LED module. The encapsulant layer covers the plurality of LED chips, the substrate and the carrier having the driving circuit.