CN200959573Y

CN200959573Y - Miniature AC power-supply module for LED

Info

Publication number: CN200959573Y
Application number: CN 200620046562
Authority: CN
Inventors: 刘伟
Original assignee: Junmingxuan Civilization & Art Co Ltd Shanghai
Current assignee: Junmingxuan Civilization & Art Co Ltd Shanghai
Priority date: 2006-09-30
Filing date: 2006-09-30
Publication date: 2007-10-10
Anticipated expiration: 2016-09-30

Abstract

The utility model discloses a micro alternating current power supply module used by light emitting diode, which comprises capacitances, resistances, diodes and controllable silicon. The resistance R <1> and the capacity C <1> are connected in parallel with one end connected with the N phase of the alternating current, the resistance R <2> is connected in parallel between the other end and the L phase of the alternating current, two ends of the resistance R <2> are connected with the bridge circuit formed by diodes D <1> to D <4>, the capacitance C <3> is connected in parallel between the positive and negative output terminals of the bridge circui, the base pole of the controllable silicon Q <1> is connected with the resistance R <3> in series to connect the positive output terminal of the bridge circuit, the collector and the emitter of the controllable silicon Q <1> are connected with the output negative terminal of the back connected bridge circuit of the resistance R <4>. The performance of the utility model is stable, the volume is small, and the production cost and using cost of the LED illumination source products are greatly reduced, the working life is prolonged, the illuminating efficiency is improved, the dissipation characteristic is improved, and the installation is simple, fast and concealed.

Description

The effective miniature AC power supply module of light-emitting diodes

Technical field

The utility model relates to the led light source lighting technology, and particularly a kind of light-emitting diode (LED) is used miniature AC power supply module.

Background technology

After Edison's invention carbon filament in 1879 incandescent lamp, lighting technology just enters a brand-new era.Look back the illumination history in 20th century, new light sources programs such as fluorescence class mercury lamp, high-low pressure sodium vapor lamp, metal halide lamp, compact fluorescent lamp, high-frequency electrodeless fluorescent lamp, microwave sulfur lamp emerge in an endless stream, yet, really cause lighting technology generation qualitative change or LED.Compare with the traditional lighting technology, the difference of the maximum of LED be structure and material difference, it is a kind of semiconductor that electric energy can be converted into visible light, two-layer up and down electrode is housed, there is electric conducting material the centre, just as a hamburger, can luminous material be the meat pie in the interlayer, the color of light changes to some extent according to the difference of material character.It is than saving 5～8 times of electric energy with conventional light source, and the life-span then can be improved 10～20 times, and is energy-efficient, low maintenance of long-life, and environment-friendly type is pollution-free.

At first, LED is just as miniature indicator light, in high-grade equipment such as computer, sound equipment and video tape recorder, use, continuous progress along with large scale integrated circuit and computer, LED display emerges rapidly, as display media of new generation, LED has become one beautiful scenery of modern city, is widely used in various public arenas.LED not only is used for the large-scale advertisement display screen in recent years, can also be used for building and traffic lighting.LED sketching the contours on the profile and can exhibiting one's skill to the full, can simulate any color as the nightscape lighting of city important building, the also big reduction of the loss of luminous flux and maintenance cost.Because volume is little, LED is fit to be made into the lines light fixture, and LED makes floor-lamp, and direction indication, pavement and track are safe and reliable, durable in use.

In the product of led light source, most of products, for example light beam, Lawn lamp, underground lamp, decorative lamp, traffic lighting etc. all are to use mains-supplied, this just requires to be provided with the AC-DC change-over circuit in these light fixtures, to adapt to the feature of LED current drives.With the light beam is example, for ease of architectural installation and setting, need be between the long light beam of tens of rice butt joint and can only be with a power supply access point mutually, so in every light beam an independent current source that can work alone and can dock mutually to be set.This power supply should have certain exporting for the required forward current near constant current of LED, higher conversion efficiency is arranged again, otherwise will lose the LED energy-saving advantages, the led light source cost is also very important in addition, the approach of selecting has behind Switching Power Supply, high frequency electric source, the capacitance decompression rectifier power source etc. multiple, according to current stability, the difference of transient overshoot and fail safe, reliability requires to do different choice.Simultaneously, the stability state of electric current directly influences the useful life of LED lamp, and is too high or unsettled electric current will seriously reduce the useful life of LED.Therefore, in order to guarantee that the led light source product can directly use alternating current as light source, existing AC-DC circuit converter volume basically is all bigger at present, causes and is using the field erected inconvenience or the increase of the volume of product own.

Summary of the invention

The purpose of this utility model is the effective miniature AC power supply module of a kind of light-emitting diodes that provides at the deficiencies in the prior art, and it reduces led light source production cost and use cost greatly; Increase the service life, improve luminous efficiency, improve heat dissipation characteristics; Reduce equal performance small product size significantly, install simple, quick, hidden.

The concrete technical scheme that realizes the utility model purpose is:

The effective miniature AC power supply module of a kind of light-emitting diodes is made up of electric capacity, resistance, diode, controllable silicon, and characteristics are: resistance R ₁With capacitor C ₁Back in parallel one termination alternating current N phase, the other end and alternating current L mutually between connecting resistance R also ₂, resistance R ₂Two termination diode D ₁～D ₄The bridge circuit of forming is between bridge circuit output plus terminal and the negative terminal and connect capacitor C ₃, controllable silicon Q ₁Base stage and resistance R ₃Series connection bridge circuit output plus terminal, controllable silicon Q ₁Collector electrode, emitter and connecting resistance R ₄After connect bridge circuit output negative terminal.

The utility model stable performance, volume is little, reduces led light source production cost and use cost greatly; Increase the service life, improve luminous efficiency, improve heat dissipation characteristics; Install simple, quick, hidden.

Description of drawings

Fig. 1 is the utility model user mode figure

Fig. 2 is Fig. 1 end view

Fig. 3 is the utility model circuit diagram

Embodiment

Consult Fig. 3, the utility model is made up of electric capacity, resistance, diode, controllable silicon, resistance R ₁With capacitor C ₁Back in parallel one termination alternating current N phase, the other end and alternating current L mutually between connecting resistance R also ₂, resistance R ₂Two termination diode D ₁～D ₄The bridge circuit of forming is between bridge circuit output plus terminal and the negative terminal and connect capacitor C ₃, controllable silicon Q ₁Base stage and resistance R ₃Series connection bridge circuit output plus terminal, controllable silicon Q ₁Collector electrode, emitter and connecting resistance R ₄After connect bridge circuit output negative terminal.

Capacitor C ₁Act as step-down and current limliting; Resistance R ₁Be bleeder resistance, it act as: when sine wave when peak-peak is cut off constantly, capacitor C ₁On remaining electric charge can't discharge, the president stored for a long time, if when maintenance human body touch C ₁The metal part, have strong electric shock may, and resistance R ₁Existence, remaining charge discharging resisting can be fallen, thus guarantor, machine safety.The resistance of bleeder resistance is relevant with the size of electric capacity, and the capacity of general electric capacity is big more, and remaining electric charge is just many more, and the resistance of bleeder resistance will be selected littler.

Diode D ₁～D ₄Effect be rectification, be to be Rectified alternating current with AC rectification; Capacitor C ₃Act as filtering, be that the pulsating dc voltage after the rectification is filtered into steady direct voltage; Resistance R ₂Being piezo-resistance, be that the high voltage pulse voltage of moment in the input power supply is released over the ground, thereby protection LED is not punctured by instantaneous pressure; Controllable silicon Q ₁And R ₃Form protective circuit, when the electric current that flows through LED during greater than set point, controllable silicon Q ₁The angle that conducting is certain is shunted circuital current, makes LED work in constant current state, resistance R ₄Play steady direct voltage effect, avoid LED to damage because of instantaneous pressure.

Consult Fig. 1, Fig. 2, when the utility model 1 uses, its output is connected with the fixed head 4 that installs dozens of LED lamp pearl 3, spiral-lock is in lamp housing 2, and its input N, L connect civil power.

Claims

1, the effective miniature AC power supply module of a kind of light-emitting diodes is made up of electric capacity, resistance, diode, controllable silicon, it is characterized in that: resistance R ₁With capacitor C ₁Back in parallel one termination alternating current N phase, the other end and alternating current L mutually between connecting resistance R also ₂, resistance R ₂Two termination diode D ₁～D ₄The bridge circuit of forming is between bridge circuit output plus terminal and the negative terminal and connect capacitor C ₃, controllable silicon Q ₁Base stage and resistance R ₃Series connection bridge circuit output plus terminal, controllable silicon Q ₁Collector electrode, emitter and connecting resistance R ₄After connect bridge circuit output negative terminal.