Lamp driving apparatus for a display
AssigneeSamsung Electronics Co., Ltd.
InventorYoung Sup Kwon
Life of this patent
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Abstract
A lamp driving apparatus wherein a plurality of two-winding balance circuits are connected to a plurality of parallel-connected lamp groups so that all of the lamps may be illuminated even though ambient conditions cause some of the lamps to have low resistance. Capacitors are connected to first electrodes and certain of the balance coil windings are connected to second electrodes of one of the lamp groups while, in a second lamp group, others of the balance coil windings are connected to the first electrodes and capacitors are connected to the second electrodes thereof, current flowing through balance coil windings to some lamps being affected by current flowing through balance coil windings to other lamps.
Claims23
A lamp driving apparatus, comprising:
- a plurality of two-electrode lamps arranged in groups;
- a plurality of two-winding balance coils;
- and
- a plurality of capacitors,
- wherein first capacitors are connected to first electrodes of a first lamp group and first windings of first balance coils are connected to second electrodes of the first lamp group, and
- first windings of second balance coils are connected to first electrodes of a second lamp group and second capacitors are connected to second electrodes of the second lamp group so that current flowing through balance coils to some lamps is affected by current flowing through balance coils to others of the lamps.
A lamp driving apparatus, comprising:
- a plurality of two-electrode lamps arranged in groups;
- an inverter unit for applying a driving voltage to the plurality of lamps;
- and
- a balance circuit unit for uniformly supplying a current to the plurality of lamps,
- wherein the plurality of lamps are connected in parallel with the inverter unit, and the balance circuit unit has a plurality of capacitors and a plurality of balance coils.
A liquid crystal display (LCD), comprising:
- a backlight unit having a lamp driving apparatus including:
- a plurality of lamps,
- an inverter unit for applying a driving voltage to the plurality of lamps, and
- a balance circuit unit for uniformly supplying a current to the plurality of lamps, the plurality of lamps being connected in parallel with the inverter unit, the balance circuit unit having a plurality of capacitors and a plurality of balance coils;
- and
- an LCD panel positioned on the backlight unit to display an image thereon.
Dependencies are inferred from the claim text.