Abstract: A power conversion structure includes a power factor correction circuit which has an energy storage coil, a switch and a voltage boosting control unit. The voltage boosting control unit drives the switch to set OFF and ON of the switch to change the period of current passing through the energy storage coil to alter the phase of the current. The energy storage coil is coupled with at least one induction coil to induce and generate driving power to energize lighting equipment. The amount of the driving power is determined by the coil ratio of the induction coil and the energy storage coil. Through the induction coil, the energy storage coil can be induced to generate the driving power which is determined by the coil ratio of the induction coil and energy storage coil.

Abstract: The present invention discloses a frequency-changing voltage regulation circuit, which applies to a power supply device that has a booster unit and a power conversion unit. The booster unit modulates an input power and converts the input power into a boosted power. The boost control circuit is coupled to the frequency-changing voltage regulation circuit of the present invention. The frequency-changing voltage regulation circuit comprises: a voltage detection circuit and a frequency setting circuit. The voltage detection circuit detects the input power sent to the booster unit and generates an input level signal according to the value of the input power. The frequency setting circuit generates a reference frequency signal corresponding to the input level signal and uses the reference frequency signal to modulate the frequency that the booster unit performs power conversion.

Abstract: A half bridge converter having a pulse width control unit, a level regulating unit, a half bridge switch unit, an electricity converting unit and a feedback unit is disclosed. The level regulating unit receives a first DC electricity and boosting the first DC electricity to a working voltage level for forming a working electricity. The pulse width control unit produces a conduction cycle signal for controlling the half bridge switch unit to switch the working electricity to a conduction timing of the electricity converting unit, so that the electricity converting unit converts the working electricity to output a second DC electricity. The feedback unit draws a feedback signal from the second DC electricity to send to the level regulating unit for altering the voltage of the working electricity, so as to adjust the output of the electricity converting unit, thereby achieving voltage regulation.

Abstract: A protection circuit with variable current level limits is coupled to between a power supply system and a load. The power supply system outputs power to drive the load. The protection circuit with variable current level limits of the present invention comprises: a current level limiting switch unit which is coupled to between the power supply system and the load to conduct the output power, a detection unit which detects the current value of the output power, a current level setting unit which sets a normal-state current level limit and a transient-state current level limit according to the current value of the output power, a current level setting unit which checks the current value of the output power and controls the current level limiting switch unit to limit the current value and a timer unit.

Abstract: The present invention includes plural power supplying units, a power distributing backplane and more than one protection circuits, wherein the power supplying unit produces an output power and the power distributing backplane integrates the output powers from plural power supplying units and distributes thereof into plural driving powers for supplying loads. The power circuit for the driving power to drive each load has a protection circuit mounted thereon, wherein the protection circuit detects a driving condition of the load or the power circuit, and according thereto, the protection circuit becomes open or close so as to disconnect or maintain the driving power. Therefore, the abnormal driving power will not influence the operation of the whole power system and other normal loads still can maintain operation. Furthermore, since plural power supplying units are used to provide the power needed by loads, the power capacity will not be wasted.

Abstract: A half bridge converter having a pulse width control unit, a level regulating unit, a half bridge switch unit, an electricity converting unit and a feedback unit is disclosed. The level regulating unit receives a first DC electricity and boosting the first DC electricity to a working voltage level for forming a working electricity. The pulse width control unit produces a conduction cycle signal for controlling the half bridge switch unit to switch the working electricity to a conduction timing of the electricity converting unit, so that the electricity converting unit converts the working electricity to output a second DC electricity. The feedback unit draws a feedback signal from the second DC electricity to send to the level regulating unit for altering the voltage of the working electricity, so as to adjust the output of the electricity converting unit, thereby achieving voltage regulation.

Abstract: The present invention discloses a synchronous rectification control circuit, comprising at least one switch unit, a pulse width control unit, a transformer, a first rectification unit, a second rectification unit, a plurality of driving units, a logic operation unit and a signal transmission unit. The logic operation unit is used for receiving a working cycle signal generated by the pulse width control unit. When the working cycle signal is changed, the signal transmission unit transmits a switching signal for changing the working conditions of the first and second rectification units at a secondary side of the transformer, so as to switch the first and second rectification units before the switch unit operates and prevent possible short circuits or overlaps.

Abstract: The present invention includes at least one power transformation device, a redundant power module to output a redundant power and an electric power distribution unit. The redundant power module includes at least an energy storage module. The power transformation device receives an input power and generates a transformed power. The power transformation device and the redundant power module are connected to the electric power distribution unit. The electric power distribution unit has a first end connecting to a power output end and a second end to receive output of the power transformation device and the redundant power module. Thereby outputs of the power transformation device and the redundant power module can be distributed to generate an output power to ensure that redundant power is provided to maintain a buffer time period in the event of power interruption or malfunction occurred to power transformation device.

Abstract: A power backup system includes a temporary power supply system and a power source switch unit. The power backup system is connected to at least one regular power supply system. In the event that output power of the regular power supply system is abnormal the power source switch unit is connected to the temporary power supply system and output of the regular power supply system. When the regular power supply system is in normal operation it is selected to provide power to drive loads. In the event of power interruption, unstable voltage or abnormal operating condition of the regular power supply system an action to switch power supply system takes places to select the temporary power supply system to maintain power supply and keep the loads to function for a selected time period.

Abstract: The present invention discloses that a primary and a secondary winding coil are respectively wound around the core and are separated by an insulating layer; and the secondary winding coil has a winding portion wound around the core through at least a circle to define two winding terminals, wherein each winding terminal of the winding portion is connected with an extending section extended to the outside of the transformer and is connected with an electricity connecting section at the rear end thereof. The electricity connecting section has plural pins electrically welded on a circuit board, thereby the extending section that is connected with a rectification switch and increases the contact areas with the air for achieving a heat-dispersing effect and the electricity connecting section are crossing connected between the secondary winding coil and the circuit board to save the space on the circuit board for arranging the secondary winding coil.

Abstract: The present invention discloses that a primary and a secondary winding coil are respectively wound around the core and are separated by an insulating layer; and the secondary winding coil has a winding portion wound around the core through at least a circle to define two winding terminals, wherein each winding terminal of the winding portion is connected with an extending section extended to the outside of the transformer and is connected with an electricity connecting section at the rear end thereof. The electricity connecting section has plural pins electrically welded on a circuit board, thereby the extending section that is connected with a rectification switch and increases the contact areas with the air for achieving a heat-dispersing effect and the electricity connecting section are crossing connected between the secondary winding coil and the circuit board to save the space on the circuit board for arranging the secondary winding coil.

Abstract: The present invention discloses a synchronous rectification control circuit, comprising at least one switch unit, a pulse width control unit, a transformer, a first rectification unit, a second rectification unit, a plurality of driving units, a logic operation unit and a signal transmission unit. The logic operation unit is used for receiving a working cycle signal generated by the pulse width control unit. When the working cycle signal is changed, the signal transmission unit transmits a switching signal for changing the working conditions of the first and second rectification units at a secondary side of the transformer, so as to switch the first and second rectification units before the switch unit operates and prevent possible short circuits or overlaps.

Abstract: A driving method for reducing the color shift suitable for driving a display panel is disclosed. The display panel includes at least one scan line, at least one data line, and at least one pixel unit electrically connected to the scan line and the data line. The driving method includes the following steps. First, turn on the pixel unit by the scan line during a frame period. Transmit a frame signal to the pixel unit by the data line during the frame period as the pixel unit is turned on. Turn on the pixel unit by the scan line between the present frame period and the next frame period. Transmit a revising signal to the pixel unit by the data line between the present frame period and the next frame period as the pixel unit is turned on, so as to reduce the color shift of the pixel unit.

Abstract: A digital-to-analog conversion unit, and a driving apparatus and a panel display apparatus using the same are provided. A driving voltage output from the digital-to-analog conversion unit can be a positive polarity voltage or a negative polarity voltage, wherein the driving voltage output from an output buffer is a positive polarity voltage and the driving voltage output from an output inverter is a negative polarity voltage. The apparatus only needs one set of grayscale voltage so that the layout area of the apparatus, and the flicker and the residual images of the display panel can be reduced.

Abstract: A display capable of adjusting its driving circuits according to an input resolution includes an active organic light emitting unit, a time data controller, a gate driving circuit and a source driving circuit. The time data controller includes a video data determining unit for determining a resolution of received video data and outputting a determination signal, and a controller for generating a data signal and a control signal according to the determination signal. The gate driving circuit is coupled to the time data controller and the plurality of scan lines, utilized to drive gates of pixels according to the control signal. The source driving circuit is coupled to the time data controller and the plurality of data lines, utilized to drive sources of pixels according to the data signal.