Abstract: A synchronous rectification and voltage stabilization circuit includes a saturable inductance coil (L1), a synchronous rectifier switch (33), a driving coil (L2) for turning on the synchronous rectifier switch, a discharging coil (L3) which co-operates with a controllable switching component (Q1) to turn off the synchronous rectifier switch, a filter circuit (40) and a voltage stabilization circuit (50). The saturable inductance coil, the synchronous rectifier switch and the filter circuit are connected in serial between an input terminal (10) and an output terminal (20). The saturable inductance coil is coiled together with the driving coil and the discharging coil on one core. The voltage stabilization circuit is connected between the output terminal and the saturable inductance coil, and is used for regulating a regulable saturation point of the saturable inductance coil according to an output voltage of the output terminal and a target value of the output voltage.

Abstract: A battery overheating protection circuit includes a thermal resistor samples the temperature of the battery and converts the temperature into a temperature voltage, a comparison circuit compares the temperature voltage with a reference voltage for judging whether the temperature of the battery is higher than the maximum reference temperatures temperature or not. If yes, the comparison circuit outputs a protection signal to drive a charging module to stop charging the battery in the charging process, and to cut off the conducting path to draw power from the battery in the discharging process. The present invention sets two different maximum reference temperatures during charging process and discharging process by a reference voltage module, which makes the maximum allowable discharging temperature is higher than the maximum allowable charging temperature.

Abstract: The invention relates to a slim USB male connector. In one embodiment, the USB male connector includes an insulating base portion, a plurality of contact terminals, and a grounding plate. The base portion includes a top surface and a bottom surface and is capable of being inserted into a standard USB female connector. The contact terminals are mounted on the upper surface and are elastically deformed after the base portion is inserted into a standard USB female connector. The grounding plate is mounted on the bottom surface and is capable of contacting tongues of a standard USB female connector to achieve system grounding.

Abstract: An exemplary electronic device capable of automatically selecting a power source includes two power ports configured to connect to external power sources and a battery compartment configured to receive a battery module. The voltage of the battery module is higher than at least one of the external power sources. The electronic device further includes a power selection module allocated between the battery module and the power port which selects the lower voltage. Three diodes are respectively located on the output path of the three power sources. A path switch that controls whether power to the device comes from the battery compartment or a power port is located between the anode of the battery compartment and the diode located on the output path of the battery module. Among the multiple power sources, the external power source providing a higher voltage is the first to be chosen to power the electronic device.

Abstract: An image display device is provided. The device includes a display screen, a storage unit, and a processing unit. The storage unit stores images and selection interface information. The selection interface information includes a plurality of catalogues each of which collects one or more images. The processing unit includes a selection interface display module, a selection control module, and an image search module. The selection interface display module controls the display screen to display a selection interface that provides the catalogues for selection according to the selection interface information. The selection control module generates a selection signal in response to a selection operation on the selection interface. The selection signal indicates which catalogue on the selection interface is selected. The image search module searches the storage unit for the images according to the selection signal. An image display method is also provided.

Abstract: An input circuit shared by multi signal sources each of which outputting a type of signals includes a processing unit (10). The processing unit includes a plurality of input pins (11) and an interrupt pin (12), each of the input pins connecting with one or more of the signal sources and receiving signals from the signal sources. The input circuit further includes a tristate buffer (30) The tristate buffer includes an enable pin (33) enabling the tristate buffer upon receiving an enable signal, a plurality of input pins (31) connecting with one or more of the signal sources and receiving signals from the signal sources, and a plurality of output pins (32) connecting with the interrupt pin of the processing unit and producing an interrupt signal to the interrupt pin according to the signals received at the input pins. A related wake-up signal input circuit is also provided.

Abstract: A power control circuit includes an electronic switch (20) interposed between a power unit (10) and an electronic device (30), a driving circuit (40) and a mechanical switch (50). The driving circuit receives a power-on signal from the mechanical switch, and signals the electronic switch to turn on and supply power to the electronic device in accordance with the power-on signal. The electronic device controls the driving circuit to maintain the electronic switch to be on and continue the power supply to the electronic device. The electronic device further receives a power-off signal from the mechanical switch, and signals the driving circuit to turn off the electronic switch and discontinues the power supply to the electronic device.

Abstract: The present invention provides an audio signal switcher including a jack switcher and a plug switcher. The jack switcher includes an audio jack and a first USB port. The audio jack includes a left track segment, a micro segment, a right track segment, and a ground segment, which are correspondingly coupled to a first data pin, a second data pin, a power pin and a ground pin of the first USB port. The plug switcher includes an audio plug and a second USB port. The audio plug includes a left track segment, a micro segment, a right track segment, and a ground segment, which are correspondingly coupled to a first data pin, a second data pin, a power pin and a ground pin of said second USB port. The jack switcher can be connected to the plug switcher by a USB cable.

Abstract: A discharge lamp lighting circuit includes a plurality of discharge lamps, a driving circuit, a control circuit, an open protection circuit, which are connected in series. The open protection circuit includes an open control circuit, a delay circuit, and a plurality of open detecting circuits connected in series. Each of the open detecting circuits is connected to a corresponding one of the discharge lamps. One terminal of the open control circuit is connected to the control circuit, and the other terminal of the open control circuit is connected to one terminal of the delay circuit and a predetermined one of the open detecting circuits. The other terminal of the delay circuit is connected to another predetermined one of the open detecting circuits and ground.

Abstract: A media player capable of automatically adjusting equalizer parameter thereof is provided. The media player includes a speaker, a processor, a memory, an audio amplifier, a decoder, an analog to digital (D/A) converter, an earphone jack for connecting with an earphone, a switch and a detecting circuit. The memory stores audio files and a voltage value-equalizer parameter look-up table. The detecting circuit detects a voltage of the speaker or the second dynamic contact of the switch and obtains a voltage value. The processor compares the voltage value with predetermined voltage values and obtains a comparison result, and reads corresponding equalizer parameters from the table according to the comparison result. The media player plays an audio files according to the equalizer parameters, thus to obtain audio effect optimization.

Abstract: The present invention provides an audio signal switcher including a jack switcher and a plug switcher. The jack switcher includes an audio jack and a first USB port. The first USB port includes a first data pin, a second data pin, a power pin, and a ground pin. The audio jack includes a left track segment, a right track segment, and a ground segment, which are electrically isolated coupled to at least three pins of the first USB port. The plug switcher includes an audio plug and a second USB port. The second USB port also includes a data pin, a second data pin, a power pin, and a ground pin. The audio plug also includes a left track segment, a right track segment, and a ground segment, which are electrically isolated coupled to at least three pins of the second USB port according to a connection between the audio jack and the first USB port. The plug switcher can be connected to the jack switcher by a USB cable.

Abstract: The present invention provides an audio signal switcher including a jack switcher and a plug switcher. The jack switcher includes an audio jack and a first USB port. The audio jack includes a left track segment, a micro segment, a right track segment, and a ground segment, which are correspondingly coupled to a first data pin, a second data pin, a power pin and a ground pin of the first USB port. The plug switcher includes an audio plug and a second USB port. The audio plug includes a left track segment, a micro segment, a right track segment, and a ground segment, which are correspondingly coupled to a first data pin, a second data pin, a power pin and a ground pin of said second USB port. The jack switcher can be connected to the plug switcher by a USB cable.

Abstract: An input device includes a power unit, a power switch unit, a processing unit, and an input unit. The power switch unit includes a first switch for supplying power to the processing unit when actuated; the input unit is connected with the processing unit and the power switch unit and is configured for generating input signals that is transmitted to the processing unit and further used for controlling the first switch; and the processing unit is configured for receiving the input signal from the input unit, keeping the first switch switched on during a time period, and performing a task corresponding to the input signal during the time period.

Abstract: A motion responsive portable media player is provided. The portable media player includes a processing unit and at least one vibration part. The vibration part acts as an input unit and operates independently of the input unit. The vibration part includes a swing means and at least one pressure sensor. The swing means is configured for hitting the pressure sensor in response to deliberate shake motions imparted on the portable media player by the user, and the pressure sensor is configured for generating a signal to the processing unit in response to a hit operation thereon. When successively receiving a predetermined number of signals from the pressure sensor during playing of musical files, the processing unit performs a predetermined operation in responsive to the predetermined number of signals.

Abstract: The present invention relates to a mobile communication terminal. The mobile communication terminal includes a display unit; a storage unit for storing communication records and communication frequencies of each of the communication records in a particular time period; and a processing unit, configured for controlling the display unit to display a subset of the communication records in the particular time period, wherein the communication records are sorted according to the associated communication frequencies, and divided into two parts, wherein the two parts of the sorted communication records are listed in an alphabetical order respectively. The present invention also provides a call history displaying method adapted for the mobile communication terminal.

Abstract: A mouse with a screen saver control function is provided. The mouse includes a left button, a right button, a scroll button, a screen saver control button, a memory unit, and a micro-processing unit. The memory unit stores a simulation program. When receiving a signal from the screen saver control button, the micro-processing unit runs the simulation program of the memory unit, and generates simulated input signals to a computer connected thereto, and thus to prevent the computer from running a screen saver program. Utilizing the mouse, a computer user can control a screen saver of the computer momentarily, without resetting a duration of initiating the screen saver program. Therefore, the mouse is very convenient for the computer user to control the computer.

Abstract: A CCFL (cold-cathode fluorescent lamp) driving system for multiple CCFL loads includes a transformer, a CCFL circuit, and a controlling circuit coupled between the transformer and the CCFL circuit. The CCFL circuit includes multiple CCFL loads. The transformer includes a primary winding and a secondary winding, with the primary winding coupled to a voltage source and the secondary winding coupled to the CCFL loads. The controlling circuit includes a part for generating a predetermined voltage signal to power the CCFL loads during a warm-up stage and another part for generating a modulation signal. With such circuit arrangement, each of the multiple CCFL loads is powered from an off state to an operationally-on state.

Abstract: A portable electronic device with a song selection function is disclosed. The device includes a storage unit, a processing unit, a display unit, an input unit and a wireless communication unit. The processing unit further includes a list displaying module and a song selecting module. A user can make use of the device to browse or select songs rapidly to play at a multimedia system in an efficient method, without the need for the user to remember the song titles or artist(s) name of the song in advance of making a selection. Consequently, the device avoids searching for songs from a complex multimedia system and is convenient for the user to select desired songs. The present invention also provides a method for achieving a song selection function.

Abstract: A mobile communication terminal such as a mobile phone to be used as a wireless microphone is disclosed. The multi-functional mobile phone has a microphone mode option. When the mobile phone is in the microphone mode, a microphone receives external analog signals to a converting unit, which converts the analog signals into digital signals; a processing unit processes the digital signals to the converting unit, the converting unit converts the digital signals into wireless signals, and a second RF module transmits the wireless signals from the converting unit to a multimedia system. The mobile phone to be used as a wireless microphone implements the function of tradition microphones in the multimedia system.

Abstract: An exemplary light circuit includes a light unit (7) that includes a plurality of light branches (L1, L2 . . . and Ln) connected in parallel; an ambient light detector (9) for detecting an ambient luminance; an ambient light switch (101) for enabling/disenabling the ambient light detector; a control unit (3) for producing PWM waves with a particular duty cycle according to the detected ambient luminance; and a switching circuit (6) for alternatively switching on and off the light unit according to the PWM waves. An exemplary electronic book (1) configured with the lighting circuit is also provided.