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US 8,134,298 B2Granted
Decorative light string device
AssigneeWang Loong Co., Ltd.
InventorChen-Sheng Yang
Life of this patent
Estimating the term…
Abstract
The present invention discloses a decorative light string device, which comprises: a power plug receiving AC power, a tail socket coupled to the power plug, and a LED string with one end thereof coupled to the power plug and the other end thereof coupled to the tail socket, wherein each of the power plug and tail socket has a diode and a capacitor coupled to the diode, whereby a DC voltage, which is twice the peak voltage of the AC power, is output to the LED string.
Claims4
A decorative light string device, comprising:
- a power plug receiving AC (Alternating Current) power,
- a tail socket coupled to said power plug, and
- a LED (Light Emitting Diode) string with one end thereof coupled to said power plug and another end thereof coupled to said tail socket,
- wherein said power plug has a first diode and a first charging capacitor coupled to said first diode to define a first charging polarity thereacross;
- and said tail socket has a second diode and a second charging capacitor coupled to said second diode to define a second charging polarity opposite said first charging polarity thereacross, each of said first and second diodes having an node and cathode terminals, one of said first and second charging capacitors being coupled to said LED strings and the cathode terminal of said diode corresponding thereto, and the other of said first and second charging capacitors being conversely coupled to said LED string and the anode terminal of said diode corresponding thereto, whereby a DC (Direct Current) voltage substantially twice a peak voltage of said AC power voltage, is generated across said LED string;
- and,
- wherein said first capacitor, said first diode, said second capacitor, and said second diode are directly coupled to said LED string.
4 more elements
Dependencies are inferred from the claim text.