DEVICE FOR DRIVING LIGHT SOURCE MODULE
First Claim
1. A driving device for driving a light source module comprising a plurality of lamps, comprising:
- a power factor correction (PFC) circuit for converting a received alternating current (AC) signal to a direct current (DC) signal;
a power stage circuit connected to the PFC circuit, for converting the DC signal to another AC signal;
an isolation transformer having a primary winding and at least a secondary winding;
wherein 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;
an inverter circuit, connected to the secondary winding of the isolation transformer, for converting an AC signal output from the isolation transformer to an appropriate signal to drive the light source module; and
a PWM controller, connected to the power stage circuit, for controlling output from the power stage circuit.
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Accused Products
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.
27 Citations
15 Claims
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1. A driving device for driving a light source module comprising a plurality of lamps, comprising:
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a power factor correction (PFC) circuit for converting a received alternating current (AC) signal to a direct current (DC) signal; a power stage circuit connected to the PFC circuit, for converting the DC signal to another AC signal; an isolation transformer having a primary winding and at least a secondary winding; wherein 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; an inverter circuit, connected to the secondary winding of the isolation transformer, for converting an AC signal output from the isolation transformer to an appropriate signal to drive the light source module; and a PWM controller, connected to the power stage circuit, for controlling output from the power stage circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A driving device for driving a light source module comprising a plurality of lamps, comprising:
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a power factor correction (PFC) circuit for converting a received alternating current (AC) signal to a direct current (DC) signal; a power stage circuit, connected to the PFC circuit, for converting the DC signal to another AC signal; an isolation transformer having a primary winding and at least a secondary winding; wherein 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; and an inverter circuit, connected to the secondary winding of the isolation transformer, for converting an AC signal output from the isolation transformer to an appropriate signal to drive the light source module, wherein the inverter circuit comprises; a plurality of transformers;
wherein each of the transformers has at least a primary winding and a secondary winding;wherein high terminals of the primary windings of the transformers are jointly connected to a high terminal of the secondary winding of the isolation transformer, low terminals of the primary windings of the transformers are jointly connected to a low terminal of the secondary winding of the isolation transformer, high terminals of the secondary windings of the transformers are respectively connected to a lamp. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A driving device for driving a light source module, comprising:
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a power factor correction (PFC) circuit for converting a received alternating current (AC) signal to a direct current (DC) signal; a power stage circuit electrically connectable with said PFC circuit for converting said DC signal output by said PFC circuit to another AC signal; an inverter circuit electrically connectable between said power stage circuit and a light source module for converting said another AC signal output by said power stage circuit to an appropriate signal to drive said light source module; and an isolation transformer electrically connectable between said power stage circuit and said inverter circuit for isolating said another AC signal output by said power stage circuit from said light source module.
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Specification