Abstract: The present invention employs a pin of a controller to set an over current protection value and a time period respectively by means of time-division and/or voltage and current. Therefore, the cost of the controller is reduced due to reducing the amount of pins thereof. Furthermore, the time period is not only used to setting a constant on time, but also used to setting a constant off time and an operating frequency for different controlling mode.

Abstract: A multiphase control system is provided, which is adapted to convert power of an input power source into an output voltage for outputting through an output terminal. The multiphase control system comprises a plurality of control units connected in series to form a loop. Each of the control units receives a sequential input signal from an adjacent control unit connected there before through a multiphase input terminal, and generates a control signal to control power transmission from the input power source to the output terminal when determining that the output voltage is lower than a predetermined voltage value, and generates a sequential output signal at a multiphase output terminal for outputting to an adjacent control unit connected there after.

Abstract: A bias voltage is compared with a voltage difference in a detecting element according to the present invention. A bias voltage unit is coupled to the detecting element, so that they have a common voltage level to avoid noises when the circuit is operating. Accordingly, the erroneous detection caused by the noise interference can be avoided. Hence, a detecting element with a low resistance, such as an MOEFET, can be used in the present invention to decrease power consumption arisen from current detection and to further increase conversion efficiency.

Abstract: A voltage detection enabling circuit is disclosed. The voltage detection enabling circuit includes a reference voltage generating unit, an enabling protection unit, and an enabling judgment unit. The reference voltage generating unit is coupled to a driving voltage, and generates a reference voltage signal. The enabling protection unit receives the reference voltage signal and outputs an enabling judgment signal when the reference voltage signal is higher than a voltage parameter. Particularly, the voltage parameter is a component parameter of an electronic component. Then the enabling judgment unit determines whether an enabling signal is generated or not according to the enabling judgment signal and the driving voltage.

Abstract: A multiphase control system is provided, which is adapted to convert power of an input power source into an output voltage for outputting through an output terminal. The multiphase control system comprises a plurality of control units connected in series to form a loop. Each of the control units receives a sequential input signal from an adjacent control unit connected there before through a multiphase input terminal, and generates a control signal to control power transmission from the input power source to the output terminal when determining that the output voltage is lower than a predetermined voltage value, and generates a sequential output signal at a multiphase output terminal for outputting to an adjacent control unit connected there after.

Abstract: The present invention employs a pin of a controller to set an over current protection value and a time period respectively by means of time-division and/or voltage and current. Therefore, the cost of the controller is reduced due to reducing the amount of pins thereof. Furthermore, the time period is not only used to setting a constant on time, but also used to setting a constant off time and an operating frequency for different controlling mode.

Abstract: A fast current generating element in a current generating unit, used by the present invention, provides a large current for accelerating the switching of transistor switches when the transistor switches are switched. The fast current generating element includes a capacitor to provide a large differential current when a voltage level transiently changes during the switching of the transistor switches. Therefore, a transient response time of a signal transformer is shortened.

Abstract: In the conventional temperature compensation circuit, the thermal resistor is used to perform the temperature compensation, but the provided compensation range is limited due to the temperature coefficient of the thermal resistor. The embodiment of the invention provides a temperature coefficient modulating circuit capable of amplifying the temperature coefficient of the thermal resistor, so as to provide a wider compensation range in different applications.

Abstract: A voltage detection enabling circuit is disclosed. The voltage detection enabling circuit includes a reference voltage generating unit, an enabling protection unit, and an enabling judgment unit. The reference voltage generating unit is coupled to a driving voltage, and generates a reference voltage signal. The enabling protection unit receives the reference voltage signal and outputs an enabling judgment signal when the reference voltage signal is higher than a voltage parameter. Particularly, the voltage parameter is a component parameter of an electronic component. Then the enabling judgment unit determines whether an enabling signal is generated or not according to the enabling judgment signal and the driving voltage.

Abstract: A bias voltage is compared with a voltage difference in a detecting element according to the present invention. A bias voltage unit is coupled to the detecting element, so that they have a common voltage level to avoid noises when the circuit is operating. Accordingly, the erroneous detection caused by the noise interference can be avoided. Hence, a detecting element with a low resistance, such as an MOEFET, can be used in the present invention to decrease power consumption arisen from current detection and to further increase conversion efficiency.

Abstract: A fast current generating element in a current generating unit, used by the present invention, provides a large current for accelerating the switching of transistor switches when the transistor switches are switched. The fast current generating element includes a capacitor to provide a large differential current when a voltage level transiently changes during the switching of the transistor switches. Therefore, a transient response time of a signal transformer is shortened.

Abstract: A DC/AC inverter for driving a load is provided. The DC/AC inverter includes a switch device, a resonant tank, a voltage detecting circuit, and a controller. The switch device is coupled to a DC power source. The resonant tank is coupled to the switch device and the load, and converts power of the DC power source transmitted from the switch device to an AC signal, so as to drive the load. The voltage detecting circuit is coupled to the load, and generates a voltage detecting signal according to a voltage of the load. The controller is coupled to the voltage detecting device and the switch device, and controls a magnitude of the power of the DC power source transmitted to the resonant tank through the switch device. The controller determines whether or not to change an operating frequency thereof according to the voltage detecting signal.

Abstract: A backlight module includes a control unit, a transformer unit, a light source unit, and a detection unit. The control unit generates a control signal and a protection instruction signal based on a detection signal group. The protection instruction signal instructs a state of the backlight module. The transformer unit transforms an input power into an output power according to the control signal. The light source unit receives the output power to emit light. The detection unit detects a state of the light source for generating the detection signal group.

Abstract: A controller comprises an error comparator, a frequency generator, a pulse-width modulator and an output driver. The error comparator generates an error signal according to a feedback signal and a reference voltage. The frequency generator provides a frequency signal. The pulse-width modulator coupled to the error comparator and the frequency generator generates a pulse-width modulated signal according to the error signal and the frequency signal. The output driver coupled to the pulse-width modulator generates at least one switch signal according to the pulse-width modulated signal. Because the frequency signal is within at least one of the first predetermined bandwidths of the frequency range during a second predetermined time interval is within a third predetermined number, beat frequency interference is not detectable by users.

Abstract: A mobile communication device comprises a communication unit and a processor. The communication unit initiates a wireless communication channel within a range. The processor coupled to the communication unit automatically determines if a server offering point of interest (POI) data exists in the range. If so, the communication unit initiates a wireless communication channel with the server and downloads the POI data therefrom.

Abstract: A wireless indicating apparatus solves the issues of operating freedom and the inconvenience of wireless input devices of the prior art. The present wireless indicating apparatus records the difference between a horizontal orientation, an operating cursor's position, and the difference between the vertical orientation and the operating cursor's position. Therefore, the user can use the wireless indicating apparatus freely. The wireless indicating apparatus comprises an operating unit, an orientation-sensing unit, a signal-processing unit, a wireless emitting unit and a power supply device. A computer system receives the operation signal via a wireless receiving device and controls the movement, clicking or selection of the cursor upon a screen. Therefore, the operation of the wireless indicating apparatus of the present invention is not limited to a flat surface. It increases the freedom of operation and convenience, and reduces injuries such as those caused by incorrect use of a mouse.

Abstract: An identifying and automatically messaging system for a wireless communication server and an operating method for the same is disclosed. A mobile phone having a wireless communication module of the preferred embodiment brings the representative of the owner in different occasion by employing the identifying and messaging system. Whereby, the mentioned mobile phone can represent for its owner by utilizing an ID code built in the wireless communication module of the same. Furthermore, the identifying and messaging system of the present invention adopted in the mobile phone can demonstrate or notify the owner's identification through the wireless communication. In addition, the wireless communication module of the mobile phone can be used to announce or refresh the information therein, or even to do the function adjustment.

Abstract: The present invention discloses a virtual keyboard, which includes a virtual region, at least two vibration sensors, a storage unit and a processing unit. The virtual region is formed on a surface and has a plurality of virtual keys. The vibration sensors are provided on the surface. The storage unit is used to store a plurality of data, each of the plurality of data recording an actual location and signification of each of the virtual keys. The processing unit is electronically connected to the vibration sensors and the storage unit. When a vibration signal is caused by touching the virtual region, each of the vibration sensors receives the vibration signal and respectively sends an output signal corresponding to the vibration signal to the processing unit.

Abstract: A data moving method and a user window interface used in general computer operating systems or portable electronic systems for moving, copying, cutting, or pasting files or folders in a one to many, many to one or even many to many manner. The user window interface comprises a data source area in which at least one source file or source folder is selected, a data target area in which at least one target data folder or target disk drive is selected for accommodating the source file or source folder to be moved, and an instruction control area in which at least one instruction for moving the source file or source folder is directed so that the source file or source folder may be moved to the target data folder or target disk drive in a one to many, many to one or many to many manner.

Abstract: A data structure for a point of interest (POI) and a method for use and application of POI information with the data structure, and is applied in a handheld device. The POI information for a single POI is sorted based on attributes of the POI and the sorted sets of POI information are included in folders, file names or POI information. As such, when a locating operation for the POI information is requested, the amount of operations for locating the handheld device may be reduced and processing thereof may be sped up. Further, the sorting technology with respect to the POI information corresponding to the POI may be performed based on an attribute district of the POI. A plurality of sets of POI information thus obtained may be compressed to a single set of POI information so that the total information stored in the handheld device may be reduced.