Light source system and method for driving light emitting diodes
First Claim
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1. A light source system, comprising:
- a light emitting diode (LED) module, comprising a plurality of LED strings operated under a direct current (DC) output voltage; and
a driving unit, coupled to the LED module, and used for providing the DC output voltage by adopting a boost means and generating a plurality of pulsation current signals by adopting means of at least a random number or an increasing or decreasing function according to a setting signal, so as to respectively drive the LED strings,wherein frequencies of the pulsation current signals are higher than a predetermined frequency,wherein the predetermined frequency is a highest audio frequency in an audible acoustic wave range, and the highest audio frequency in the audible acoustic wave range is 20 KHz.
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Abstract
A light source system and a method for driving light emitting diodes (LEDs) are provided. The provided light source system includes: an LED module having a plurality of LED strings operated under a direct current (DC) output voltage; and a driving unit coupled to the LED module, and used for providing the DC output voltage by adopting a boost means and generating a plurality of pulsation current signals according to a setting signal so as to respectively drive the LED strings, in which the frequencies of the pulsation current signals are higher than a predetermined frequency.
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14 Claims
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1. A light source system, comprising:
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a light emitting diode (LED) module, comprising a plurality of LED strings operated under a direct current (DC) output voltage; and a driving unit, coupled to the LED module, and used for providing the DC output voltage by adopting a boost means and generating a plurality of pulsation current signals by adopting means of at least a random number or an increasing or decreasing function according to a setting signal, so as to respectively drive the LED strings, wherein frequencies of the pulsation current signals are higher than a predetermined frequency, wherein the predetermined frequency is a highest audio frequency in an audible acoustic wave range, and the highest audio frequency in the audible acoustic wave range is 20 KHz. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for driving light emitting diodes (LEDs), applicable to driving a plurality of LED strings, the method comprising:
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providing a direct current (DC) output voltage by adopting a boost means so as to enable the LED strings to be operated under the DC output voltage; and generating a plurality of pulsation current signals by adopting means of at least a random number or an increasing or decreasing function according to a setting signal, so as to respectively drive the LED strings, wherein frequencies of the pulsation current signals are higher than a predetermined frequency, wherein the predetermined frequency is a highest audio frequency in an audible acoustic wave range, and the highest audio frequency in the audible acoustic wave range is 20 KHz. - View Dependent Claims (11, 12, 13, 14)
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Specification