Light emitting diode back light system and method for driving back light source used therein
AssigneeChunghwa Picture Tubes, Ltd.
InventorsChi-Hsiu Lin, Han-Yu Chao
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Abstract
A light emitting diode (LED) back light system and a method for driving a back light source used therein are provided. The LED back light system includes an LED back light source, a power converting circuit, and a sequential outputting circuit. The LED back light source includes a plurality of areas. The power converting circuit is used to convert an external power source into a driving power source. The sequential outputting circuit is electrically connected to the power converting circuit and said areas so as to generate a plurality of driving signals according to the driving power source. In addition, said driving signals are sequentially outputted to drive said areas at different time.
Claims10
A light emitting diode (LED) back light system, comprising:
- an LED back light source comprising a plurality of areas;
- a power converting circuit used to convert an external power source into a driving power source;
- and
- a sequential outputting circuit electrically connected to the power converting circuit and said areas so as to generate a plurality of driving signals according to the driving power source, said driving signals being sequentially outputted to drive said areas at different time.
A method for driving a light emitting diode (LED) back light source, comprising:
- dividing the LED back light source into a plurality of areas;
- converting an external power source to a driving power source;
- and
- generating a plurality of driving signals according to the driving power source and sequentially outputting the driving signals so as to drive said areas at different time.
Dependencies are inferred from the claim text.