Abstract: A power system for driving plural or multiple lamps includes a transformer circuit, a filter and steady-flow circuit, and a light source. The transformer circuit transforms a voltage level of an input AC signal, and includes a first output end for outputting a first AC signal, and a second output end for outputting a second AC signal. The first and second AC signals are opposite in phase. The filter and steady-flow circuit includes a first plurality of filter and steady-flow units connected to the first output end for suppressing harmonic signals of the first AC signal and outputting a plurality of third AC signals. The light source has a first plurality of lamps, each of which having one end connected to one of a respective one of the first plurality of filter and steady-flow units so as to be driven by a respective one of the third AC signals.

Abstract: A discharge lamp driving device for driving a lamp module (23) including a plurality of lamps includes a switch circuit (21), a transformer and filter circuit (22), and a microcontroller (20). The switch circuit converts a received signal to an alternating current signal. The transformer and filter circuit is connected between the switch circuit and the lamp module, for amplifying and shaping the alternating current signal. The microcontroller connected to the switch circuit for outputting a control signal to control the switch circuit to output the alternating current signal to the lamp module. In the invention, correlative parameters and specifications of the circuit are predetermined via the microcontroller. Therefore, the structure of the whole circuit is simple.

Abstract: A driving device for driving a light source module (47) includes a PFC circuit (42), a power stage circuit (44), an isolation transformer (T1), an inverter circuit (45) and a PWM controller (46). The PFC circuit converts a received AC signal to a DC signal. The power stage circuit is connected to the PFC circuit, for converting the DC signal to another AC signal. The isolation transformer has a primary winding and at least one secondary winding. The primary winding of the isolation transformer is connected to the power stage circuit, for isolating the received AC signal from the light source module. The inverter circuit is connected to the secondary winding of the isolation transformer, for converting an AC signal output from the isolation transformer to an appropriate signal. The PWM controller is connected to the power stage circuit, for controlling output from the power stage circuit.

Abstract: The backlight system comprises a light source module, a control circuit board, a current-balancing circuit board, and a plurality of high voltage lines. The light source module comprises a plurality of light sources. The control circuit board is configured with a control circuit for converting a received signal to a high voltage signal to drive the light source module. The current-balancing circuit board is configured with a four-layered structure and copper foils within the four-layered structure form a plurality of capacitors so as to balance current flowing through the light sources. The plurality of high voltage lines connect the control circuit board to the current-balancing circuit board.

Abstract: A dimming mode selecting circuit (25) includes a switch circuit (251) and a compensation circuit (252). The switch circuit selects a first input voltage or a second input voltage according to an input signal. The compensation circuit connects to the switch circuit, for compensating voltage loss of the first input voltage or the second input voltage in the dimming mode selecting circuit, and outputting a first compensated input voltage or a second compensated input voltage according to the switch circuit. In the invention, the dimming mode selecting circuit combines a hysteresis circuit (250) with the compensation circuit, to make the input signal stably and the output signal reliably. The structure of the circuit is simple.

Abstract: A light source driving device includes a power stage circuit, a first transformer circuit, a second transformer circuit, and a feedback control circuit. The power stage circuit converts a received signal to an alternating current (AC) signal, which includes a synchronizing switching bridge arm, a first bridge arm, and a second bridge arm. The synchronizing switching bridge arm has a Soft-Switching function, and forms a first full-bridge circuit with the first bridge arm and forms a second full-bridge circuit with the second bridge arm. The first transformer circuit is connected to the first full-bridge circuit, for converting the AC signal. The second transformer circuit is connected to the second full-bridge circuit, for converting the AC signal. The feedback control circuit is connected between the light source module and the power stage circuit, for controlling output of the power stage circuit.

Abstract: A light source driving device is for driving a plurality of light sources of a light source module (12), and comprises an inverter circuit (11), a current sampling circuit (13) and a PWM controller (14). The inverter circuit converts a received DC signal to an electrical signal adapted for driving the light sources. The current sampling circuit for sampling current flowing through the inverter circuit, comprises an impedance detecting component (Z11) and an amplifying circuit (132), the impedance detecting component detects the current from the inverter circuit, the amplifying circuit is connected to the impedance detecting component for amplifying the current signal. The PWM controller is connected to the current sampling circuit for receiving the amplified current signal output from the current sampling circuit, and generating a control signal to the inverter circuit to control output thereof.

Abstract: A transformer (10) with high sustain voltage includes a first bobbin (125), a second bobbin (126), a core assembly (127), and an insulating frame (128a). The first bobbin defines a first hollow therein. The second bobbin is coupled to the first bobbin, and defines a second hollow therein. The core assembly includes a first iron core (127a) partly received in the first hollow and a second iron core (127b) partly received in the second hollow. The insulating frame is disposed between the first bobbin and the second bobbin, for insulatively isolating at least one part of the first iron core from the second iron core.

Abstract: A driving device for driving a light source module (12) includes an input current limiting circuit (10) and an inverter (11). The input current limiting circuit includes an input current sensing circuit (100) and a feedback compensation circuit (103), for limiting current of an input power signal of the driving device to a predetermined range. The input current sensing circuit is used for sensing a current signal of the input power signal of the driving device. The feedback compensation circuit is connected to the input current sensing circuit, for outputting a compensation signal according to the sensed current signal. The inverter is connected between the input current limiting circuit and the light source module, and includes a feedback circuit (112). The feedback circuit is connected to the feedback compensation circuit, for receiving the compensation signal and feeding back current flowing through the light source module.

Abstract: A light source simulating device comprises a circuit board, at least a conductor and at least a resistor. The circuit board has a first surface. The conductor is disposed on the first surface of the circuit board. The resistor is also disposed on the first surface of the circuit board and connected in series to a high voltage end and a low voltage end of the light source simulating device by the conductor for simulating the light source. The light source simulating device in the present invention simulates the light source by the resistor and replaces the actual discharge lamps, which have lower cost, smaller test place and higher test reliability of the inverter.

Abstract: A voltage sensing circuit (230) for sensing voltage signals of input alternating current (AC) signals includes a plurality of voltage dividing circuits (23n (n=1, 2, 3, . . . , n)) and a charging circuit (232). The voltage dividing circuits are used for dividing voltage signals of the input AC signals. The voltage dividing circuits are connected to the charging circuit, and then the divided voltage signals can be transmitted between the voltage dividing circuits, thereby pulling high corresponding DC levels of the divided voltage signals.

Abstract: A driving device for driving plural discharge lamps. A controller circuit converts a received signal to a first high voltage signal and a second high voltage signal. A first balancing circuit is mounted on a first connecting board and connected to one ends of the discharge lamps. A second balancing circuit is mounted on a second connecting board and connected to the other ends of the discharge lamps. A first set of high voltage lines connects the controller board and the first connecting board, and the first high voltage signal is outputted from the control circuit to the first balancing circuit via the first set of high voltage lines. A second set of high voltage lines connects the controller board and the second connecting board, and the second high voltage signal is outputted from the control circuit to the second balancing circuit via the second set of high voltage lines.

Abstract: A system for driving a plurality of lamps comprises a lamp module, an inverter circuit providing currents to the lamp module, an interface for conveying the currents, a splitter, a balance unit, and a fault detecting circuit. The splitter receives the currents provided by the inverter circuit through the interface and distributing the currents to the plurality of lamps. The balance unit balances the currents provided to the plurality of lamps in the lamp module. The fault detecting circuit detects and reports a condition of at least one of the lamps by detecting signals generated from the inverter circuit. The fault detecting circuit receives the signal from a point in the system, such that the fault detecting circuit can detects the signals before the signal undergoes the distributing by the splitter.

Abstract: A system for driving a plurality of lamps includes an inverter circuit (20) and a fault detecting circuit (30). The inverter circuit includes a plurality of outputs divided into a first output part and a second output part. The fault detecting circuit is used for detecting whether one or more of the plurality of outputs of the inverter circuit is faulty, and includes a magnetic element circuit (300) and a signal detecting circuit (310). The magnetic element circuit is used for generating an induction signal according to flux changes of the magnetic element circuit when one of the plurality of outputs is faulty. The signal detecting circuit is used for generating a fault signal according to the induction signal.

Abstract: A driving device for driving a light source module (47) includes a PFC circuit (42), a power stage circuit (44), an isolation transformer (T1), an inverter circuit (45) and a PWM controller (46). The PFC circuit converts a received AC signal to a DC signal. The power stage circuit is connected to the PFC circuit, for converting the DC signal to another AC signal. The isolation transformer has a primary winding and at least one secondary winding. The primary winding of the isolation transformer is connected to the power stage circuit, for isolating the received AC signal from the light source module. The inverter circuit is connected to the secondary winding of the isolation transformer, for converting an AC signal output from the isolation transformer to an appropriate signal. The PWM controller is connected to the power stage circuit, for controlling output from the power stage circuit.

Abstract: A driving device (100) for driving a plurality of discharge lamps (14), and includes a controller board (11), a connecting board (15), and a group of high voltage lines (17). The controller board includes a controller circuit (13) for converting a received signal to a high voltage signal suitable to drive the plurality of discharge lamps. The connecting board includes a balance circuit for balancing currents flowing through the plurality of discharge lamps. The connecting board is substantially perpendicular to the controller board. The high voltage lines are connected to the controller board and the connecting board, and the high voltage signal from the controller circuit is output to the balance circuit via the high voltage lines.

Abstract: A driving device for driving a lamp (L) includes a power stage circuit (21), a transformer circuit (22), a voltage dividing circuit (23), an inrush current sensing circuit (24), and a controller circuit (26). The power stage circuit converts a received direct current (DC) signal to an alternating current (AC) signal. The transformer circuit is connected to the power stage circuit, for converting the AC signal to an appropriate signal to drive the lamp. The voltage dividing circuit is connected to the transformer circuit, for dividing voltage of the signal output from the transformer circuit. The inrush current sensing circuit is connected to the voltage dividing circuit, for sensing inrush current output from the transformer circuit. The controller circuit is connected to the power stage circuit, for controlling output of the power stage circuit according to output of the inrush current sensing circuit.

Abstract: A driving device for driving a light source module (12) includes an input current limiting circuit (10) and an inverter (11). The input current limiting circuit includes an input current sensing circuit (100) and a feedback compensation circuit (103), for limiting current of an input power signal of the driving device to a predetermined range. The input current sensing circuit is used for sensing a current signal of the input power signal of the driving device. The feedback compensation circuit is connected to the input current sensing circuit, for outputting a compensation signal according to the sensed current signal. The inverter is connected between the input current limiting circuit and the light source module, and includes a feedback circuit (112). The feedback circuit is connected to the feedback compensation circuit, for receiving the compensation signal and feeding back current flowing through the light source module.

Abstract: A transformer (10) with high sustain voltage includes a first bobbin (125), a second bobbin (126), a core assembly (127), and an insulating frame (128a). The first bobbin defines a first hollow therein. The second bobbin is coupled to the first bobbin, and defines a second hollow therein. The core assembly includes a first iron core (127a) partly received in the first hollow and a second iron core (127b) partly received in the second hollow. The insulating frame is disposed between the first bobbin and the second bobbin, for insulatively isolating at least one part of the first iron core from the second iron core.

Abstract: A voltage sensing circuit (230) for sensing voltage signals of input alternating current (AC) signals includes a plurality of voltage dividing circuits (23n (n=1, 2, 3, . . . , n)) and a charging circuit (232). The voltage dividing circuits are used for dividing voltage signals of the input AC signals. The voltage dividing circuits are connected to the charging circuit, and then the divided voltage signals can be transmitted between the voltage dividing circuits, thereby pulling high corresponding DC levels of the divided voltage signals.