LED lighting lamp

Abstract

The invention discloses an LED lighting lamp which comprises an AC-DC rectification circuit, a constant current control circuit and an LED module group. The AC-DC rectification circuit comprises an alternating-current input end, a device for protecting overcurrent and a full-bridge rectification circuit which are connected in sequence. The full-bridge rectification circuit converts input power frequency alternating current into pulsating direct current. The constant current control circuit comprises a segmented starting control circuit, a pulse constant current control circuit and a constant current limiting circuit which are connected in sequence. The sub-stage starting control circuit comprises a second resistor, a voltage-stabilizing diode and a second capacitor. The constant current limiting circuit comprises a third resistor. The LED module group comprises six LED modules. High-voltage LEDs or COB-packaged LEDs or self-establishing LED groups are used in the LED module group. Input alternating current is converted into frequency-doubled pulsating direct current which is converted into segmented direct current constant current to be output.

Description

technical field [0001] The invention relates to a lamp, in particular to an LED lighting lamp. Background technique [0002] LED (Lighting Emitting Diode) is a light-emitting diode, which is a semiconductor solid-state light-emitting device. It uses a solid semiconductor chip as a light-emitting material, and the excess energy is released through the recombination of carriers in the semiconductor to cause photon emission and directly emit light. LED lighting products are lighting appliances manufactured using LEDs as light sources. LED is called the fourth-generation lighting source or green light source. It has the characteristics of energy saving, environmental protection, long life, and small size. It can be widely used in various indications, displays, decorations, backlights, general lighting and urban night scenes. The LED light source is driven by DC, and the electro-optic power conversion is close to 100% with ultra-low power consumption (0.03 watts to 1 watt for a...

AI Technical Summary

Problems solved by technology

[0003] At present, LEDs are all driven by DC, so a constant current drive power supply needs to be added between the mains and the LED to convert the AC mains into a suitable DC for LEDs. Due to the existence of this constant current drive power, LED lamps must provide a place The drive cavity of the constant current drive power supply, so the radiator of the LED lamp must be a hollow columnar body, and due to the standard restrictions on the shell and appearance of the lamp, the radiators of the current LED lamps are relatively large and heavy, resulting in the entire lamp. The traditional lamps will be much heavier, and the installation reliability and safety will be seriously affected; and the light-emitting surface of the lamps will be smaller than the traditional lamps, which limits the popularity and application of LED lamps

In addition, because there are a large number of electrolytic capacitors and magnetic components in this constant current drive power supply to improve harmonics and electromagnetic compatibility problems, it often leads to shorter life of the entire LED lamp and poor electromagnetic compatibility.

Moreover, the constant current drive power supply is generally placed in the drive cavity, and the heating device cannot be in direct contact with the radiator, resulting in poor heat dissipation capability of the constant current drive power supply, which indirectly deteriorates the reliability of the lamp, shortens the life, and deteriorates the efficiency.

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