Patent Application
20100194297
1. Field of the Invention
The present invention relates to a decorative light string device, particularly to a decorative light string device formed of LEDs.
2. Description of the Related Art
Light strings are usually used in shops, festivals, wedding ceremonies, concerts, etc. In traditional light strings, common colored light bulbs are externally attached to the cables. With the advance of science and technology, LEDs (Light Emitting Diode) replace the power-consuming light bulbs. Currently, the light string available in the market is usually formed of a plurality of LEDs.
The color and the light efficiency of LED correlate with the material and fabrication process thereof. There have been red, green, blue and white LEDs available in the market. The working voltage of LED is only 1.5-3 volts. Therefore, LED is a power-efficient device. LED can actively emit light having a considerable brightness. Further, the brightness of LED can be regulated via adjusting the voltage or current thereof. Furthermore, LED features impact resistance, vibration resistance and a long service life.
Refer to
Therefore, the present invention proposes a voltage-boost light string device to solve the abovementioned problem.
The primary objective of the present invention is to provide a light string device having a full-wave voltage-doubling circuit in the plug thereof, wherein the full-wave voltage-doubling circuit can provide a DC (Direct Current) voltage doubling the peak voltage of the supplied AC (Alternating Current) power, whereby the quantity or brightness of LEDs can be increased without replacing the power supply or increasing the cost.
The light string device disclosed by the present invention comprises a plug and at least one light string connected to the plug. The plug comprises a casing, a full-wave voltage-doubling circuit, and a set of electric-conduction plug blades connected with the full-wave voltage-doubling circuit and a power supply. The power supply provides an AC power for the plug blades, and the plug blades transmit the AC power to the full-wave voltage-doubling circuit. The full-wave voltage-doubling circuit converts the AC power into a high-voltage signal and outputs the high-voltage signal to the light string. The LEDs of the light string is thus powered to emit light.
Below, the embodiments are described in detail in cooperation with the attached drawings to make easily understood the objectives, technical contents, characteristics and accomplishments of the present invention.
The present invention proposes a light string device, wherein the quantity of LEDs of a light string is increased without consuming too much electric power. Below, the technical contents of the present invention are described in detail with the embodiments and the drawings.
Refer to
As shown in
In the present invention, when the plug blades 30 of the plug 22 of the light string device 20 are inserted into the power supply 26, the power supply 26 provides an AC power for the full-wave voltage-doubling circuit 32 via the plug blades 30; the full-wave voltage-doubling circuit 32 converts the AC power into a high-voltage signal and outputs the high-voltage signal to the light string 24 to make the LEDs 241 emit light. Compared with the conventional technology, the light string device of the present invention may have more LEDs 241 in the light string or have higher brightness of LEDs 241 with the quantity of LEDs 241 remaining unchanged. Because of the increased quantity or enhanced brightness of LEDs, the present invention can make a space present a fresh and vivid visual effect.
The embodiments described above are to demonstrate the technical contents and characteristics of the present invention to enable the persons skilled in the art to understand, make, and use the present invention. However, it is not to limit the scope of the present invention. Any equivalent modification or variation according to the spirit of the present invention is to be also included within the scope of the present invention.
