6 results about "Voltage reduction" patented technology

The invention provides a power line carrier communication terminal device which comprises a power line carrier power adapter system used for allowing a strong-current power supply to be subjected to voltage reduction processing for outputting a low-voltage power supply, a signal modulation-demodulation system used for modulating/demodulating signals, and a signal transmission device used for transmitting low-voltage power supply and power line carrier signal, wherein the power output interface of the power line carrier power adapter system is connected with the power input interface of the signal modulation-demodulation system through the signal transmission device, so as to supply low-voltage direct current supply; and the power line carrier signal transmission interface of the power line carrier power adapter system is connected with the power line carrier signal transmission interface of the signal modulation-demodulation system through the signal transmission device, so as to realize the power line carrier signal communication. The device provided by the invention solves the electric safety problem, has an integrally reduced size and brings convenience for integration.

The invention relates to a semiconductor lighting driving circuit which is compatible with a thyristor dimmer and a voltage input type dimmer. The semiconductor lighting driving circuit comprises a rectification filtering circuit, a power factor correction (PFC) circuit, a control circuit and a conversion circuit, wherein the rectification filtering circuit is used for converting an alternating current which comes from an alternating current power supply into a direct current; the PFC circuit is used for performing voltage reduction on the direct current; the control circuit is used for generating a pulse width modulation (PWM) control signal according to the direct current which is subjected to voltage reduction or an output voltage of the voltage input type dimmer; and the conversion circuit is used for supplying electric energy to a semiconductor lighting device according to the PWM control signal. The semiconductor lighting driving circuit is compatible with the thyristor dimmer and the voltage input type dimmer, can steadily operate in various kinds of dimming modes, and is high in generality. The semiconductor lighting driving circuit can independently operate, and the semiconductor lighting driving circuit and other circuit modules can conveniently form a product with high cost performance. Moreover, with the PFC circuit, the electromagnetic interference of the circuit can be remarkably reduced, so that the circuit operates more steadily and more reliably.

A technique for achieving both discharge voltage reduction and discharge stabilization in a PDP and the like is provided. This PDP manufacturing method includes, for a structure of a front plate structure (11) to be exposed to a discharge space (30) to be filled with a discharge gas, a step of forming a first layer (4) having an effect of discharge protective layer on a dielectric layer (3), a step of forming a second layer (5) for protecting the first layer on the first layer, and a step of forming a third layer (6) of a powder for discharge stabilization to be exposed to the discharge space (30), the steps being performed in vacuum manufacturing process. And, the structure is made such that a surface of the first layer is exposed to the discharge space (30) by a step of removing the second layer by an aging discharge in the discharge space (30).

The invention relates to the field of power management, and provides a Buck type high power factor converter based on an integrated controller. In order to achieve high power factors, according to the technical scheme, the Buck type high power factor converter based on the integrated controller comprises a peripheral circuit, a rectifying bridge is composed of four diodes, and a partial voltage structure which is formed by two resistors which are in series connection is connected to the rear portion of the rectifying bridge in parallel; the positive output end of an AC input power source is connected to the negative electrode of one diode, the negative output end of the AC input power source is connected with an MOS switch through a current detecting resistor, and the other end of the MOS switch is connected with the positive electrode of the corresponding diode. The positive electrodes of the diodes are connected with one end of a voltage reduction inductor. An output load is connected with a difference partial voltage structure in parallel. Middle nodes of the two resistors are connected to the base electrode of a P-type audion, a high level end is connected to the emitting electrode of a secondary audion after passing through an emitting electrode resistor, a collector electrode is connected to the ground after passing through a collector electrode resistor, and a node between the collector electrode and the resistors outputs voltage feedback signals. The Buck type high power factor converter based on the integrated controller is mainly suitable for power source management.

The invention discloses a time sequence control module, and the control module comprises a first time sequence control unit, a second time sequence control unit, a third step-down circuit, a first step-down circuit, a second step-down circuit and a third step-down circuit; a first timing control unit; the first voltage reduction circuit which is connected with the first time sequence control unit;the second sequential control unit; the second step-down circuit which is connected with the second sequential control unit; the third sequential control unit; and the third step-down circuit which is connected with the third sequential control unit.