Patent Application
20080049461
Please refer to
Referring to
More specifically, the driving circuit of the invention includes: a power source 10 to provide an AC signal. It may be city power to output electricity at a specification according to the specification of each country (such as 10V or 220V);
EMI filter units 21 and 31 and commutation units 22 and 32 that are bridge types consisting of diodes. The EMI filter unit 21 and commutation unit 22 are coupled in parallel with another EMI filter unit 31 and another commutation unit 32, and receive respectively the AC signal provided by the power source 10. The AC signal is filtered and rectified to become a full wave/half wave pulse wave DC signal to be output;
an inverter 24 which may be a piezoelectric inverter to receive the full wave/half wave DC signal and boost the voltage to output a high voltage electric signal to the first load 40. The commutation unit 22 and the inverter 24 may be bridged by a power factor corrector 23 according to environmental regulations of each country so that after the voltage of the full wave/half wave DC signal is transformed, it is sent to the inverter 24 to improve resonant wave distortion and phase deviation; and
a DC voltage transformation unit 33 which is a voltage-lowering transformer. It receives the full wave/half wave pulse wave DC signal and lowers the voltage to output a low voltage electric signal to the second load 50.
Refer to
In short, in the present invention a power source 10 provides an AC signal to an intermediate voltage circuit system 20 and a low voltage circuit system 30 that are coupled in a parallel manner to drive respectively a first load 40 and a second load 50. Thereby one set of power supply can output multiple power. The power supply thus formed is more flexible and efficient. It can be used on a display device to provide a low voltage DC output connection port to couple with various products such as speakers, lamps, 3C products that require a low voltage DC power. Thus it can expand the existing design architecture in the industry.
While the preferred embodiments of the invention have been set forth for the purpose of disclosure, modifications of the disclosed embodiments of the invention as well as other embodiments thereof may occur to those skilled in the art. Accordingly, the appended claims are intended to cover all embodiments which do not depart from the spirit and scope of the invention.
