Low-power LED illuminating lamp

A technology for LED lighting and LED lamps, applied in lighting devices, lighting and heating equipment, components of lighting devices, etc., can solve the problem that the service life of the lamps cannot exceed the life of the power supply, and achieve similar power consumption and small dynamic internal resistance. , the effect of good constant current capability

Inactive Publication Date: 2010-06-02
谢中
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Problems solved by technology

Therefore, although the life of LED lamp beads reaches more than 50,000 hours, the actual service life of its lamps cannot exceed the life of the power supply.

Method used

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Embodiment Construction

[0014] Principle of the present invention: the AC voltage of general commercial power is 220V, 230V or 110V. Generally, the forward voltage drop of white LED lamp beads is 3-3.2V, depending on the size of the working current. To use 220V AC voltage to drive LED to emit light, it is necessary to provide appropriate DC current to the LED lamp bead. The conventional method is to use a constant current switching power supply to provide current for the LED lamp beads. The disadvantage of this method is that the efficiency of the power supply itself is only about 80%, and the reliability and life of the power supply itself are limited by the performance of the components used, and the cost of the power supply is relatively high. If 78 LED lamp beads are connected in series in the forward and reverse directions directly to the 220V AC power supply, this not only saves the step-down and filter capacitors, but also saves the rectifier silicon bridge, but the fatal disadvantage is that...

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Abstract

The invention discloses a low-power LED illuminating lamp, comprising a current-limiting capacitor, a rectifier bridge, a parallel capacitor and an LED lamp, wherein the current-limiting capacitor is connected between the electric supply and a bridge type rectifier in series, the output end of the bridge type rectifier is connected with the LED lamp, and a non-polarity and non-electrolyte capacitor is connected to the output end of the bridge type rectifier in parallel. In the invention, the rectified pulse direct current is used for directly driving the beads of the small-power LED lamp to illuminate by the function of high-internal resistance and self-current limitation function of the small-capacity non-electrolyte capacitor, and both ends of the bead string of the LED lamp are connected with a small-capacity non-electrolyte capacitor and the current-limiting capacitor in parallel for branching voltage to prevent overvoltage instantly generated during switching on a power supply from damaging the beads of the LED lamp. The invention greatly prolongs the service life of the LED lamp, has the advantages of high reliability, low cost, high efficiency, minor power consumption and long service life, and can also be used as a backlight source of a television, a display screen, a notebook computer and the like for illumination.

Description

technical field [0001] The invention relates to an LED lighting lamp, in particular to a low-power LED lighting lamp. Background technique [0002] The existing lighting lamps are mainly incandescent lamps / halogen lamps and energy-saving lamps. Traditional incandescent lamps have the lowest efficiency of converting electricity into light, less than 10%, and a large amount of energy is turned into heat energy. Based on the consideration of energy saving, all parts of the world have formulated timetables for replacing incandescent lamps with energy-saving lamps. It is the general trend to replace incandescent lamps with more energy-efficient lighting methods. [0003] The luminous efficiency of LED lamps is much higher than that of existing energy-saving lamps, but its chip manufacturing process is complicated, the price is high, and its performance is also restricted by heat dissipation efficiency. With the continuous advancement of LED lighting technology, the application ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S2/00F21V23/00F21Y101/02F21V29/508F21V29/83
Inventor 谢中谢晓
Owner 谢中
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