CN2535995Y

CN2535995Y - Drive circuit device of LED lamp

Info

Publication number: CN2535995Y
Application number: CN 02203882
Authority: CN
Inventors: 谢金木
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-02-07
Filing date: 2002-02-07
Publication date: 2003-02-12
Anticipated expiration: 2012-02-07

Abstract

The utility model relates to a driving circuit device for LED lighting apparatus, which comprises a control circuit connected with LED lamps, a power circuit and a reserve power circuit which are connected with the LED lamps through the control circuit, wherein the power circuit can be used in alternating current or direct current power supply environment and can output a direct current power supply, the LED lamps can be lightened and the reserve power circuit can be charged through the control circuit, when the power circuit fails power, the control circuit can ensure that the LED lamps are connected with the reserve power circuit, thereby the LED lamps has the function of no power failure, and with the low consumption luminescent material LED lamps, considerable working time can be sustained through the reserve power circuit.

Description

The driving circuit device of LED light fixture

Technical field

The utility model relates to a kind of driving circuit device, refers to that especially a kind of stand-by power supply circuit that utilizes makes the LED can be under the power interruptions state, the driving circuit device of the LED light fixture of the effect that still sustainable maintenance is lighted.

Background technology

At present, all kinds of form light source development relevant with light-emitting diode fast, as light-emitting diodes such as indigo plant, white lights, the power consumption that adds light-emitting diode is little, long service life, light are difficult for flicker, therefore after white light is succeeded in developing, promptly begin plan and replace osram lamp or the luminous material of the contour power consumption of fluorescent tube, reducing the use of electric weight effectively, and reach the final purpose of electrical energy saving.

When utilizing a plurality of LED lamps, when manufacturing is equal to the desk lamp of general lamp brightness or illuminator lamp, then need with the symmetric mode permutation and combination a plurality of LED lamps, or install reflecting plate additional, reaching the purpose that strengthens amount of light, and wherein the employed driving power of this LED lamp is that DC power supply drives, so be applied under the AC power environment, then need be through using processing of circuit such as transformation or rectification, so that after the AC power rectification is DC power supply, supply with this LED lamp group.

From the above, it will be expected that LED develops into the indispensable main lighting source of general life, therefore for the lighting of being made up of the LED lamp, should provide the device and the function of more convenient operation and use, in order to the development speed of such LED light fixture.

Summary of the invention

For this reason, but main purpose of the present utility model provides a kind of driving circuit device of LED light fixture of uninterrupted power supply, makes this lamp group be applicable to the environment of interchange or DC power supply, can have not power down function equally.

Desiring to reach the employed major technique means of above-mentioned purpose is to make this drive circuit be connected to a LED lamp group, and it includes:

One power circuit, it exports a direct current power supply;

One control circuit, it is connected to power end and this power circuit of this LED lamp group, in order to power circuit output DC source is supplied to this LED lamp group;

One stand-by power supply circuit, it mainly is made up of a storage battery, and it is connected to power circuit and LED lamp group respectively by this control circuit, under the normality, charge, when the power circuit power breakdown by power circuit, promptly constitute the loop, LED lamp group is powered with lasting with LED lamp group;

Above-mentioned drive circuit is at power circuit still under the state of regular supply power supply, make LED lamp group, stand-by power supply circuit energized circuit by this control circuit, wherein this LED lamp group can obtain the DC power supply of power circuit and light, this stand-by power supply circuit is then obtained charge power supply to reach automatic charging action, and when the power circuit interruption of power supply, promptly be considered as open circuit, even this control circuit LED lamp group and power circuit are isolated, LED lamp group will change by the stand-by power supply circuit supply this moment, and still sustainable lighting; Therefore, can be applicable under the AC and DC power supply, all make it have uninterrupted power supply, and allow the more perfect operating function of LED lamp group tool by this design LED lamp group.

An of the present utility model purpose provides a kind of driving circuit device of LED light fixture, drive circuit in order to control LED Emergency Light light fixture, its circuit structure and above-mentioned roughly the same, only this control circuit is when the power circuit normal power supply, control LED lamp group does not constitute electric power loop with power circuit, i.e. not conducting is lighted, and when this power circuit interrupts the power supply supply, promptly make LED lamp group be connected to the stand-by power supply circuit immediately, and but conducting is lighted, by this, so that LED lamp group reaches the function of emergency lighting.

The utility model purpose again provides a kind of charging deixis, promptly connects an indicator light in this stand-by power supply circuit, and mainly detect the stand-by power supply circuit and whether reached the charging saturation condition, by this, as reaching whether the indication stand-by power supply is charged state at present.

Description of drawings

Fig. 1: be a detailed circuit diagram of the utility model drive circuit, it discloses the driving circuit device of general lighting with the LED light fixture;

Fig. 2: be another detailed circuit diagram of the utility model drive circuit, it discloses the driving circuit device of general lighting with the LED light fixture;

Fig. 3: be the another detailed circuit diagram of the utility model drive circuit, it discloses the driving circuit device of general lighting with the LED light fixture;

Fig. 4: be a detailed circuit diagram again of the utility model drive circuit, it discloses the drive circuit of Emergency Light with LED lamp group;

Fig. 5: be applied to a desk lamp for of the present utility model one.

The figure number part:

10 LED lamp groups, 11 power circuits

11a power circuit 11b power circuit

111 transformers, 112 rectifiers

12 control circuit 12a control circuits

12b control circuit 121 diverter switches

13 stand-by power supply circuit, 131 storage batterys

14 indication charging circuits, 20 desk lamps

Embodiment

The utility model is a kind of drive circuit that makes LED lamp group use down in the AC power environment, wherein this drive circuit also can make this LED lamp group light action for a long time under the outage environment, see also shown in Figure 1, for being a preferable actual embodiment who does of the utility model drive circuit, it is connected to one group of LED lamp group 10, and it includes:

One power circuit 11, it is made up of the bridge rectifier 112 that a transformer 111, is connected to these transformer 111 secondary sides, and this power circuit 11 is connected an AC power, can export a direct current power supply by transformer 111 and rectifier 112;

One control circuit 12 is connected between this LED lamp group 10 and the aforementioned power source circuit 11, and wherein this control circuit 12 is connected to LED lamp group 10 by a switching switch 121; In present embodiment, this control circuit 12 includes bias resistor R1, the light-emitting diode D1 who is connected in series with bias resistor R1 that a NPN or PNP transistor Q1, are connected to this transistor Q1 base, collector terminal, and a zener diode Z1 who is connected between transistor Q1 base stage and earth terminal; Wherein, transistor Q1 base stage is for being connected with power circuit 11 outputs by aforementioned light-emitting diode D1, bias resistor R1, and its emitter-base bandgap grading then is connected to the power end of LED lamp group 10;

One stand-by power supply circuit 13, it mainly is made up of a storage battery 131, and this storage battery 131 is connected with the power end of LED lamp group 10, and is connected with the output of power circuit 11 by this control circuit 12;

One charging indication 14, it is mainly by an indicator light D2 and two-transistor Q2, Q3 forms, wherein this first transistor Q2 is connected between the negative pole end and a grounding resistor R2 of this storage battery 131, because storage battery 131 is uncharged when saturated, promptly obtain a charge power supply, and this moment, this grounding resistor R2 can form a pressure drop, and make the first transistor Q2 conducting, at this moment, because the first transistor Q2 conducting ground connection, so be connected in the then not conducting of transistor seconds Q3 of the first transistor Q2, the indicator light that is serially connected with this transistor seconds Q3 will not lighted, otherwise, if storage battery 131 has charged to when identical with power circuit 11 output DC sources, grounding resistor R2 does not then have pressure drop, at this moment, the first transistor Q2 not conducting immediately, and this transistor seconds Q3 is a conducting ground connection, this moment, this indicator light D2 promptly lighted, and it is saturated to inform that by this present storage battery 131 has reached charging.

Above-mentioned drive circuit is under the state of power circuit 11 regular supply AC power, then can export a direct current power supply and give stand-by power supply circuit 13, if diverter switch 121 is closed, then DC power supply can export LED lamp group 10 to and it is lighted, because control circuit 12 cuts out conducting, so LED lamp group 10 constitutes the loop with power circuit 11, storage battery 131 by 11 pairs of these stand-by power supply circuit 13 of power circuit carries out charging procedure simultaneously, and when this AC interruptions, then this LED lamp group 10 opens circuit with power circuit 11, this moment, control circuit 12 still was a closed condition, so that LED lamp group 10 directly constitutes electric power loop with stand-by power supply circuit 13, continue to keep the conducting illuminating state.

See also shown in Figure 2ly, be another preferred embodiments of the present utility model, its big multicircuit setting is identical with Fig. 1, does not only have the power circuit of Fig. 1, only directly this control circuit 12 is connected to a direct current power supply 11a.

More than for answering the general lighting lamp driving circuit, range of application that it is possible such as wall lamp, down lamp and desk lamp 20 shown in Figure 5 etc., in addition, the utility model more can be by the change of drive circuit, make the LED lamp group 10 should be in the driving of Emergency Light with light fixture.

See also shown in Figure 3 again, be applied to the drive circuit of tight exit light for the utility model, its circuit design mostly together as shown in Figure 1, only do not have and establish charging indication and diverter switch, if that is power circuit 11 provides the storage battery 131 of DC power supply to LED lamp group 10 and this stand-by power supply circuit 13 when flat, so when AC interruptions is powered, this LED lamp group 10 can be supplied with by this stand-by power supply circuit 13, and still can keep lighting the effect of illumination.

See also shown in Figure 4, it is the drive circuit that is applied to an automatic emergency light, the power circuit 11b that it is basic, stand-by power supply circuit 13 all is similar to Fig. 1, only this control circuit 12b is by a capacitor C1, transistor Q1 and resistor R 1 are formed, wherein this transistor Q1 promptly is connected to LED lamp group 10 by an electronic switch SW2, when power circuit 11b output DC source during to this capacitor C1, even not conducting of this transistor Q1, so not conducting of electronic switch SW2, and LED lamp group 10 is lighted, otherwise, if this power circuit 11b does not have DC power supply output because of power interruptions, this moment, capacitor C1 then can discharge to resistor R 1, and made this transistor Q1 conducting, simultaneously this electronic switch SW2 interlock conducting and ground connection, at this moment, LED lamp group 10 promptly constitutes electric power loop with stand-by power supply circuit 13 and begins to light, and by this, reaches the Emergency Light function.

In sum, the utility model is provided with a stand-by power supply circuit by drive circuit, and the design that whether is connected with power circuit or stand-by power supply circuit as control LED lamp group with control circuit, make this LED lamp group can be used as and have the lighting that does not cut off the power supply, also can be used as emergency lighting, that is, by the various design of drive circuit, and make LED lamp group be changed multi-purpose light fixture, as desk lamp, wall lamp, down lamp or tight exit light etc., really make LED lamp group can replace osram lamp or the luminous material of the contour power consumption of fluorescent tube, as new electroluminescent lamp material.

Therefore, design of the present utility model meets the important document of novel patent, files an application in whence mere formality in accordance with the law.

Claims

1, a kind of driving circuit device of LED light fixture is characterized in that: it is connected to the LED lamp group that a plurality of LED lamps compose in parallel, and it includes:

The power circuit in one output DC source, its output is connected to this control circuit, and its input is connected to AC power or DC power supply;

One control circuit is connected to the power end and the power circuit end of this LED lamp group, and promptly this LED lamp group obtains working power by this control circuit from this power circuit;

One stand-by power supply circuit, it is made up of a storage battery, is connected to power circuit and this LED lamp group respectively by this control circuit, charge by power circuit under the normality, when the power circuit power breakdown, promptly constitute the loop with LED lamp group, with lasting LED lamp group is powered.

2, the driving circuit device of LED light fixture as claimed in claim 1 is characterized in that: it further includes a charging indication, promptly connects an indicator light in this stand-by power supply circuit, lights by charging current between stand-by power supply circuit and power circuit.

3, the driving circuit device of LED light fixture as claimed in claim 1 or 2, it is characterized in that: this control circuit is made up of a resistor, a transistor and a zener diode, wherein this strings of transistors is connected between LED lamp group and power circuit, and its base terminal passes through this zener diode to earth terminal.

4, the driving circuit device of LED light fixture as claimed in claim 1 or 2, it is characterized in that: this control circuit is by connecting ground capacitor, resistor in the lump, and one the transistor that is connected to this parallel connection ground capacitor and resistor form, wherein this transistor is connected to this LED lamp group by an electronic switch.

5, the driving circuit device of LED light fixture as claimed in claim 1 is characterized in that: this power circuit is made up of the rectification circuit that a transformer and is connected to this transformer output.

6, the driving circuit device of LED light fixture as claimed in claim 2 is characterized in that: this charging indication is made up of an indicator light and two-transistor, and wherein this transistor is connected between the negative pole end and a grounding resistor of this storage battery.