Preferred embodiment to led light string
First Claim
1. A light string comprising:
- a predetermined number of light emitting diodes (LEDs) and sockets forming individual electrical components electrically coupled in series to form at least one series block, each electrical component defining individual alternating current average drive voltages, the series block having a first electrical component and a last electrical component, and an alternating current electrical power supply having an average supply voltage, wherein a summation of said individual alternating current average drive voltages is substantially equal to said average supply voltage.
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Accused Products
Abstract
An LED light string employs a plurality of LEDs wired in block series-parallel, where the one or more series blocks, each driven at the same input voltage as the source voltage (110 VAC or 220 VAC), are coupled in parallel. The LED light string interfaces to the source voltage using a common household plug; it may also include a corresponding common, household socket, coupled in electrical parallel, to enable multiple light strings to be connected to each other from end to end. In order to directly drive a network of diodes without current-limiting circuitry, the voltage of each series block of diodes must be matched to the input source voltage. This voltage matching requirement for direct AC drive places fundamental restrictions on the number of diodes on each diode series block, depending on the types of diodes used. For the voltage to be “matched,” in each series block, the peak input voltage must be less than or equal to the sum of the maximum diode voltages for each series block.
53 Citations
24 Claims
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1. A light string comprising:
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a predetermined number of light emitting diodes (LEDs) and sockets forming individual electrical components electrically coupled in series to form at least one series block, each electrical component defining individual alternating current average drive voltages, the series block having a first electrical component and a last electrical component, and an alternating current electrical power supply having an average supply voltage, wherein a summation of said individual alternating current average drive voltages is substantially equal to said average supply voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 19, 20, 21, 22, 23, 24)
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18. A light string comprising:
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a predetermined number of light emitting diodes (LEDs) and sockets forming individual electrical components electrically coupled in series to form at least one series block, each electrical component defining individual alternating current average voltages and peak voltages, the series block having a first electrical component and a last electrical component, and an alternating current electrical supply having an average supply voltage and a peak supply voltage, wherein a first summation of said individual alternating current average voltages is substantially equal to said average supply voltage and a second summation of said peak voltages is substantially equal to said peak supply voltage.
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Specification