Inverter circuit, fluorescent tube lighting apparatus, backlight apparatus, and liquid crystal display
First Claim
1. A driving apparatus for driving a plurality of fluorescent tubes arranged in parallel in a substantially identical longitudinal direction by applying voltages of opposite phases to the ends of each of the fluorescent tubes, wherein voltages of opposite phases are supplied to the ends on the same side of at least a pair of fluorescent tubes immediately adjacent in the direction in which the fluorescent tubes are arranged among the plurality of fluorescent tubes.
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Accused Products
Abstract
A driving apparatus and a driving method are disclosed that are capable of uniformly lighting each entire fluorescent tube irrespective of the length or number of fluorescent tubes when simultaneously driving a plurality of fluorescent tubes in a fluorescent tube lighting apparatus. When two inverter circuits having respective transformers are provided at both ends of a fluorescent tube to light the fluorescent tube by push-pull driving, feedback windings of transformers not used in self-excited oscillation of each inverter circuit are connected together, with the transformer connection that connects together the feedback windings being either in-phase or in opposite phase, and the method of connection for fluorescent tubes connecting to secondary windings of each transformer can be changed in accordance with that connection method.
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Citations
11 Claims
- 1. A driving apparatus for driving a plurality of fluorescent tubes arranged in parallel in a substantially identical longitudinal direction by applying voltages of opposite phases to the ends of each of the fluorescent tubes, wherein voltages of opposite phases are supplied to the ends on the same side of at least a pair of fluorescent tubes immediately adjacent in the direction in which the fluorescent tubes are arranged among the plurality of fluorescent tubes.
- 7. A driving apparatus for driving a plurality of fluorescent tubes, wherein voltages are supplied to each of the fluorescent tubes using a pair of inverter circuits each comprising a plurality of transformers for stepping up an input voltage, wherein the pair of inverter circuits are synchronized.
Specification