Abstract: A driving circuit for driving at least one lamp includes a power switching circuit, a first transformer and a feedback control circuit. The power switching circuit is electrically connected with a power source to generate an input current. The first transformer includes a primary winding and a secondary winding. The primary winding is electrically connected with the power switching circuit. The secondary winding is for transforming the input current to drive the lamp. The feedback control circuit is connected in parallel with the primary winding in order to measure a voltage variation of the primary side and output a power control signal. The power switching circuit adjusts a current for driving the lamp according to the power control signal.

Abstract: A detecting device of an inverter system comprises at least one detecting element and at least one comparative unit. The detecting element is electrically connected to any one of the connecting parts of the inverter system to get a voltage signal. The comparative unit generates a control signal to shut the inverter system down when the voltage signal is higher than a reference signal.

Abstract: A light-source driving device includes a pulse controlling circuit, a signal adjusting circuit and a driving circuit. The pulse controlling circuit generates a first controlling signal and a second controlling signal. The signal adjusting circuit is coupled to the pulse controlling circuit and outputs a first switching signal, a second switching signal, a third switching signal and a fourth switching signal according to the first controlling signal and the second controlling signal, respectively. The driving circuit is coupled to the signal adjusting circuit and at least one light-emitting unit, and generates a driving signal to drive the light-emitting unit according to the first switching signal, the second switching signal, the third switching signal and the fourth switching signal.

Abstract: A self-excitation system includes a first transformer, a second transformer, a first self-excitation switching circuit and a second self-excitation switching circuit. The first transformer is electrically connected to the first self-excitation switching circuit and has a first resonance winding, a switching-control winding, a first synchronous switching-control winding and a first output winding. The first output winding is coupled to the first resonance winding, the switching-control winding and the first synchronous switching-control winding. The first synchronous switching-control winding is electrically connected to the second self-excitation switching circuit. The second transformer is electrically connected to the second self-excitation switching circuit. The second transformer has a second resonance winding, a second synchronous switching-control winding and a third output winding. The third output winding is coupled to the second resonance winding and the second synchronous switching-control winding.

Abstract: A digital programmable control circuit of a backlight module for controlling a lamp circuit includes a memory unit, a processing unit and a pulse width modulation (PWM) unit. The memory unit stores a lamp parameter. The processing unit electrically connected to the memory unit reads the lamp parameter. The PWM unit is electrically connected to the processing unit. The processing unit controls the PWM unit to generate a PWM signal for controlling the lamp circuit according to the lamp parameter.

Abstract: A driving circuit for driving at least one lamp includes a power switching circuit, a first transformer and a feedback control circuit. The power switching circuit is electrically connected with a power source to generate an input current. The first transformer includes a primary winding and a secondary winding. The primary winding is electrically connected with the power switching circuit. The secondary winding is for transforming the input current to drive the lamp. The feedback control circuit is connected in parallel with the primary winding in order to measure a voltage variation of the primary side and output a power control signal. The power switching circuit adjusts a current for driving the lamp according to the power control signal.

Abstract: A current balance circuit is driven by a power source to balance currents flowing through a plurality of lamps. The current balance circuit includes a plurality of first balance transformers. The first balance transformers are electrically connected to the lamps respectively. The first balance transformers are connected in series.

Abstract: A detecting device of an inverter system comprises at least one detecting element and at least one comparative unit. The detecting element is electrically connected to any one of the connecting parts of the inverter system to get a voltage signal. The comparative unit generates a control signal to shut the inverter system down when the voltage signal is higher than a reference signal.