CN203387735U

CN203387735U - Control circuit for LED festival lamps

Info

Publication number: CN203387735U
Application number: CN201320444711.9U
Authority: CN
Inventors: 王安; 莫荣纪
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-07-23
Filing date: 2013-07-23
Publication date: 2014-01-08
Anticipated expiration: 2023-07-23

Abstract

The utility model provides a control circuit for LED festival lamps, belongs to the festival lamp control technology field and solves problems of wire waste existing in direct current power supply and influence of visual jittering on a light emitting effect of LED festival lamps existing in alternating current power supply in the prior art. The control circuit comprises an LED circuit, the LED circuit comprises at least one LED festival lamp unit, the LED festival lamp unit comprises two LED lamps which are in inverse-parallel connection, the control circuit further comprises a control loop, a single-chip computer and an interlock circuit, the single-chip computer comprises two output ends which are the first output port and the second output port, the first output port and the second output port are respectively connected with the interlock circuit, the interlock circuit is connected with the control loop, and the control loop is connected with the LED circuit. The control circuit for the LED festival lamps can realize an effect of wire saving and solves a problem of influence of visual jittering on the light emitting effect of the LED festival lamps existing in alternating current power supply in the prior art.

Description

A kind of control circuit of LED Holiday lamp

Technical field

The utility model belongs to Holiday lamp control technology field, relates to a kind of control circuit of LED Holiday lamp.

Background technology

For improving performance and the useful life of Holiday lamp, the lamp holder of Holiday lamp adopts the LED lamp usually, and the power supply of LED lamp has two kinds of forms at present, and a kind of is to adopt AC power, and a kind of is DC power supply.The control method that adopts the LED lamp of DC power supply is all to adopt a road controllable silicon list to single control LED lamp processed, and N LED lamp, need N controllable silicon, this structure do not exist the danger of reverse breakdown and brightness higher.Adopt the LED circuit for lamp of ac power supply to divide again two kinds, a kind of circuit requirement LED lamp is all the reverse parallel connection type of attachment, to whole LED circuit for lamp, it is the all-wave cycling, and there do not is the danger of reverse breakdown, but for every paths of LEDs lamp, only have half-wave, brightness is darker but energy-conservation, the shortcoming of current this structure is a road bidirectional triode thyristor conducting simultaneously two paths of LED lamp, can not to certain paths of LEDs lamp, be controlled separately; Another does not have reverse parallel connection to connect exactly, the tactic pattern with ac power supply equally, there is the danger of reverse breakdown in the LED lamp, cause useful life shorter, although be also half-wave, but have and have convenient certain paths of LEDs lamp work of controlling, it is more that current technical disadvantages is that power line requires, and N paths of LEDs lamp needs N root power line.

For the problems referred to above, control circuit and control method (its application number is 200810120939.6) thereof that I was once studied and applied for a kind of LED of patent, it is single that the control circuit of this LED lamp has solved existing LED circuit control, LED lamp short problem in useful life.The control circuit of this LED comprises microcomputer chip circuit, AC power and LED circuit, the microcomputer chip circuit connects and controls the luminous situation of LED circuit with LED circuit, LED circuit is formed in parallel by several LED unit, between AC power and microcomputer chip circuit, is provided with ac zero-crossing detection circuit.

Although above-mentioned patent has solved existing LED circuit, control single, LED lamp short problem in useful life, economize on the purpose of line by having utilized alternating current to reach simultaneously, but there is the vision shake because the sinusoidal linearity of the power supply of alternating current makes the LED lamp when working, affect the illumination effect of Holiday lamp reality.

Summary of the invention

There are the problems referred to above in the utility model for existing technology, has proposed a kind of control circuit of LED Holiday lamp, solves the problem that there is the vision shake in ac power supply when the control circuit of this LED Holiday lamp can reach province's line effect.

The utility model is realized by following technical proposal: a kind of control circuit of LED Holiday lamp, comprise LED circuit, described LED circuit is comprised of at least one LED Holiday lamp unit, described LED Holiday lamp unit is comprised of the LED lamp of two reverse parallel connections, it is characterized in that, the control circuit of this LED Holiday lamp also comprises LED lamp for controlling two reverse parallel connections control loop of conducting successively, high for exporting, the single-chip microcomputer of low level signal and for the interlock circuit of the simultaneously conducting of LED lamp that prevents two reverse parallel connections, described single-chip microcomputer comprises two outputs, be respectively the first output port and the second output port, described the first output port all is connected with interlock circuit with the second output port, described interlock circuit is connected with control loop, described control loop is connected with LED circuit.

Because making the LED lamp of two reverse parallel connections, the sine linearity of alternating current has the problem of vision shake in real work, for this problem, the LED lamp that the control circuit of this LED Holiday lamp utilizes direct current to control two reverse parallel connections when reaching province's line effect is worked successively, setting program in single-chip microcomputer, control the first output port and the second output port is alternately exported high, low level signal, when the first output port output high level signal, the second output port output low level signal, interlock circuit pins reverse LED lamp control loop, connect forward LED lamp control loop, the now luminous work of LED lamp of forward LED lamp control loop, otherwise, the first output port output low level signal, the second output port output high level signal, interlock circuit pins forward LED lamp control loop, the oppositely luminous work of LED lamp of LED lamp control loop, by promoting the frequency of single-chip microcomputer output low and high level signal, thereby solved the effect of the vision shake of alternating current existence, the single-chip microcomputer occasional is made mistakes due to program or extraneous factor causes the first output port and the second output port output low level signal simultaneously, that can burn pipe to pipe circuit meeting short circuit power supply, and after adding interlock circuit, interlock circuit is to need only the wherein first output low level of a certain delivery outlet, that can pin the other side's power tube not allow its conducting, thereby avoided the potential safety hazard in short circuit.

In the control circuit of above-mentioned LED Holiday lamp, described control loop comprises power tube Q1, power tube Q2, power tube Q3 and power tube Q4, described power tube Q1 and power tube Q2 are the NPN pipe, described power tube Q3 and power tube Q4 are the PNP pipe, the base stage of described power tube Q1 is connected with interlock circuit, collector electrode is connected with the collector electrode of power tube Q3, grounded emitter, the base stage of described power tube Q2 is connected with interlock circuit, collector electrode is connected with the collector electrode of power tube Q4, grounded emitter, one end of described LED circuit is connected on the collector electrode connected node of power tube Q1 and power tube Q3, the other end is connected with dropping resistor R1, on the collector electrode connected node of described resistance R 1 and power tube Q2 and power tube Q4, the base stage of described power tube Q3 is connected with interlock circuit, emitter is connected with the emitter of power tube Q4, the base stage of described power tube Q4 is connected with interlock circuit, the power input of the control circuit that the emitter connected node of described power tube Q3 and power tube Q4 is this LED Holiday lamp.Power tube Q1 and power tube Q4 form the conducting loop of forward LED lamp, and power tube Q2 and power tube Q3 form the conducting loop of reverse LED lamp, and resistance R 1 plays the current-limiting protection effect.

In the control circuit of above-mentioned LED Holiday lamp, described interlock circuit comprises crossover connection Q5, crossover connection Q6, interlocking pipe Q7, interlocking pipe Q8, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6 and resistance R 7, described crossover connection Q5, crossover connection Q6, interlocking pipe Q7 and interlocking pipe Q8 are the PNP pipe, the first output port of described single-chip microcomputer is connected with resistance R 2 one ends, the other end of described resistance R 2 is connected with the base stage of crossover connection Q6, described resistance R 3 one ends are connected on the connected node that resistance R 2 is connected with the first output port, the other end is connected with the base stage of interlocking pipe Q7, the second output port of described single-chip microcomputer is connected with resistance R 4 one ends, the other end of resistance R 4 is connected with the base stage of interlocking pipe Q8, one end of described resistance R 5 is connected on the connected node that resistance R 4 is connected with the second output port, the other end is connected with the base stage of crossover connection Q5, the collector electrode of described crossover connection Q5 is connected with resistance R 7 one ends, the other end of described resistance R 7 is connected with the base stage of power tube Q2, the emitter of described crossover connection Q5 is connected with the collector electrode of interlocking pipe Q7, the emitter of described interlocking pipe Q7 is connected with the emitter of power tube Q3, the base stage of described power tube Q3 is connected on the connected node of emitter of the collector electrode of interlocking pipe Q7 and power tube Q5, the collector electrode of described crossover connection Q6 is connected with resistance R 6 one ends, the other end of described resistance R 6 is connected with the base stage of power tube Q1, the emitter of described crossover connection Q6 is connected with the collector electrode of interlocking pipe Q8, the emitter of described interlocking pipe Q8 is connected with the emitter of power tube Q4, the base stage of described power tube Q4 is connected on the connected node of emitter of the collector electrode of interlocking pipe Q8 and power tube Q6.Manage Q7, interlocking pipe Q8 realization interlocking by interlocking, avoid conducting simultaneously to cause short circuit.

In the control circuit of above-mentioned LED Holiday lamp, the resistance of described resistance R 2 is greater than resistance R 3.If the resistance of resistance R 2 is less than resistance R 3, interlock circuit lost efficacy, and power tube Q6 keeps conducting, causes short circuit.

In the control circuit of above-mentioned LED Holiday lamp, the resistance of described resistance R 5 is greater than resistance R 4.If the resistance of resistance R 5 is less than resistance R 6, interlock circuit lost efficacy, and power tube Q5 keeps conducting, causes short circuit.

In the control circuit of above-mentioned LED Holiday lamp, described power input is connected with current rectifying and wave filtering circuit.Can directly access the 220V civil power.

As another kind of scheme, in the control circuit of above-mentioned LED Holiday lamp, described power input is connected with Switching Power Supply.Can directly access the 220V civil power, the good stability that the Simultaneous Switching power supply has advantages of.

Compared with prior art, the control circuit of this LED Holiday lamp has the following advantages: 1, the access direct current is also by regulating the frequency of single-chip microcomputer output signal, thereby improve LED lamp glow frequency, solved the problem of the vision shake of the sinusoidal linear power supply existence of alternating current when assurance economizes line; 2, interlock circuit is set, effectively prevents the short-circuit conditions occurred when single-chip microcomputer is made mistakes, avoid burning out of components and parts, improve the dependability of LED lamp; 3, current rectifying and wave filtering circuit or Switching Power Supply are set, can directly introduce the 220V civil power, improved practicality.

The accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

In figure, 1, single-chip microcomputer.

Embodiment

Be below specific embodiment of the utility model by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiment.

As shown in Figure 1, a kind of control circuit of LED Holiday lamp, comprise LED circuit, control loop, interlock circuit and single-chip microcomputer, and single-chip microcomputer is connected with interlock circuit, and interlock circuit is connected with control loop, and control loop is connected with LED circuit.

LED circuit is comprised of at least one LED Holiday lamp unit, LED Holiday lamp unit is comprised of the LED lamp of two reverse parallel connections, single-chip microcomputer comprises two outputs, be respectively the first output port and the second output port, the first output port is the A end in Fig. 1, the second output port is the B end in Fig. 1, single-chip microcomputer passes through program setting, when the first output port output high level signal, the second output port output low level signal, when the second output high level signal, the first output port output low level signal, the first output port all is connected with interlock circuit with the second output port, interlock circuit is connected with control loop, control loop is connected with LED circuit.

Control loop, for controlling the LED lamp conducting successively of two reverse parallel connections, comprises power tube Q1, power tube Q2, power tube Q3 and power tube Q4, and power tube Q1 and power tube Q2 are the NPN pipe, and power tube Q3 and power tube Q4 are the PNP pipe, the LED lamp simultaneously conducting of interlock circuit for preventing two reverse parallel connections, comprise crossover connection Q5, crossover connection Q6, interlocking pipe Q7, interlocking pipe Q8, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6 and resistance R 7, crossover connection Q5, crossover connection Q6, interlocking pipe Q7 and interlocking pipe Q8 are the PNP pipe, the collector electrode of power tube Q1 is connected with the collector electrode of power tube Q3, grounded emitter, the collector electrode of power tube Q2 is connected with the collector electrode of power tube Q4, grounded emitter, one end of the LED lamp of two reverse parallel connections is connected on the collector electrode connected node of power tube Q1 and power tube Q3, the other end is connected with dropping resistor R1, on the collector electrode connected node of resistance R 1 and power tube Q2 and power tube Q4, the emitter of power tube Q3 is connected with the emitter of power tube Q4, the power input of the control circuit that the emitter connected node of power tube Q3 and power tube Q4 is this LED Holiday lamp, power input can be connected with current rectifying and wave filtering circuit or directly be connected with Switching Power Supply, just can directly utilize the civil power of 220V.The first output port of single-chip microcomputer is connected with resistance R 2 one ends, the other end of resistance R 2 is connected with the base stage of crossover connection Q6, resistance R 3 one ends are connected on the connected node that resistance R 2 is connected with the first output port, the other end is connected with the base stage of interlocking pipe Q7, the second output port of single-chip microcomputer is connected with resistance R 4 one ends, the other end of resistance R 4 is connected with the base stage of interlocking pipe Q8, one end of resistance R 5 is connected on the connected node that resistance R 4 is connected with the second output port, the other end is connected with the base stage of crossover connection Q5, the collector electrode of crossover connection Q5 is connected with resistance R 7 one ends, the other end of resistance R 7 is connected with the base stage of power tube Q2, the emitter of crossover connection Q5 is connected with the collector electrode of interlocking pipe Q7, the emitter of interlocking pipe Q7 is connected with the emitter of power tube Q3, the base stage of power tube Q3 is connected on the connected node of emitter of the collector electrode of interlocking pipe Q7 and power tube Q5, the collector electrode of crossover connection Q6 is connected with resistance R 6 one ends, the other end of resistance R 6 is connected with the base stage of power tube Q1, the emitter of described crossover connection Q6 is connected with the collector electrode of interlocking pipe Q8, the emitter of interlocking pipe Q8 is connected with the emitter of power tube Q4, the base stage of power tube Q4 is connected on the connected node of emitter of the collector electrode of interlocking pipe Q8 and power tube Q6, in the control circuit of this LED Holiday lamp, for preventing short circuit, the resistance of the resistance R 2 of selecting is greater than resistance R 3, the resistance of resistance R 5 is greater than resistance R 4.

The operation principle of the control circuit of this LED Holiday lamp is as follows: because the sine linearity of alternating current makes the LED lamp of two reverse parallel connections, have the problem of vision shake in real work, for this problem, the LED lamp that the control circuit of this LED Holiday lamp utilizes direct current to control two reverse parallel connections when reaching province's line effect is worked successively, setting program in single-chip microcomputer, control the first output port and the second output port is alternately exported high, low level signal, when the first output port output high level signal, the second output port output low level signal, not conducting of interlocking pipe Q7 in interlock circuit, pin reverse LED lamp control loop, interlocking pipe Q8 conducting, connect forward LED lamp control loop, power tube Q1 and power tube Q4 conducting form loop, the now luminous work of forward LED lamp, otherwise, the first output port output low level signal, the second output port output high level signal, the not conducting of interlocking pipe Q8 in the interlock circuit lock, pin forward LED lamp control loop, interlocking pipe Q7 conducting, power tube Q2 and power tube Q3 conducting, the oppositely luminous work of LED lamp, by promoting the frequency of single-chip microcomputer output low and high level signal, by FREQUENCY CONTROL more than 80HZ, thereby solved the effect of the vision shake of alternating current existence, but because the situation that program is made mistakes appears in the single-chip microcomputer occasional, cause the first output port and the second output port to export high level signal or low level signal simultaneously, if not being set, interlock circuit can not cause forward LED lamp and oppositely LED lamp conducting simultaneously, cause short circuit, by interlocking pipe Q7 and interlocking pipe Q8 are set, when Single Chip Microcomputer (SCM) program is made mistakes, pin forward LED lamp loop and reverse LED lamp loop simultaneously, thereby avoid short circuit and burn out components and parts, the control circuit of this LED Holiday lamp has better stability and reliability, current rectifying and wave filtering circuit or Switching Power Supply are set simultaneously, can directly with the 220V city, be electrically connected to, improved practicality, this circuit also has advantages of the power of saving simultaneously, as in parallel in the same way as two LED lamps of traditional circuit, need two LED lamps simultaneously bright, the electric current that each LED lamp needs is 15mA, need total current 30mA, and the output frequency of this circuit is the above forward and reverse electric current of 80HZ, simultaneously bright with the LED lamp that reaches two reverse parallel connections, while due to output frequency, being greater than 80HZ, due to visual effect, feel that two LED lamps are luminous at the same time, now in fact only have the LED lamp of a forward or an Opposite direction connection luminous, only need the electric current of 15mA, therefore saved the power of half than traditional circuit.

Claims

1. the control circuit of a LED Holiday lamp, comprise LED circuit, described LED circuit is comprised of at least one LED Holiday lamp unit, described LED Holiday lamp unit is comprised of the LED lamp of two reverse parallel connections, it is characterized in that, the control circuit of this LED Holiday lamp also comprises LED lamp for controlling two reverse parallel connections control loop of conducting successively, high for exporting, the single-chip microcomputer of low level signal (1) and for the interlock circuit of the simultaneously conducting of LED lamp that prevents two reverse parallel connections, described single-chip microcomputer (1) comprises two outputs, be respectively the first output port and the second output port, described the first output port all is connected with interlock circuit with the second output port, described interlock circuit is connected with control loop, described control loop is connected with LED circuit.

2. the control circuit of LED Holiday lamp according to claim 1, it is characterized in that, described control loop comprises power tube Q1, power tube Q2, power tube Q3 and power tube Q4, described power tube Q1 and power tube Q2 are the NPN pipe, described power tube Q3 and power tube Q4 are the PNP pipe, the base stage of described power tube Q1 is connected with interlock circuit, collector electrode is connected with the collector electrode of power tube Q3, grounded emitter, the base stage of described power tube Q2 is connected with interlock circuit, collector electrode is connected with the collector electrode of power tube Q4, grounded emitter, one end of described LED circuit is connected on the collector electrode connected node of power tube Q1 and power tube Q3, the other end is connected with dropping resistor R1, on the collector electrode connected node of described resistance R 1 and power tube Q2 and power tube Q4, the base stage of described power tube Q3 is connected with interlock circuit, emitter is connected with the emitter of power tube Q4, the base stage of described power tube Q4 is connected with interlock circuit, the power input of the control circuit that the emitter connected node of described power tube Q3 and power tube Q4 is this LED Holiday lamp.

3. the control circuit of LED Holiday lamp according to claim 1 and 2, it is characterized in that, described interlock circuit comprises crossover connection Q5, crossover connection Q6, interlocking pipe Q7, interlocking pipe Q8, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6 and resistance R 7, described crossover connection Q5, crossover connection Q6, interlocking pipe Q7 and interlocking pipe Q8 are the PNP pipe, the first output port of described single-chip microcomputer (1) is connected with resistance R 2 one ends, the other end of described resistance R 2 is connected with the base stage of crossover connection Q6, described resistance R 3 one ends are connected on the connected node that resistance R 2 is connected with the first output port, the other end is connected with the base stage of interlocking pipe Q7, the second output port of described single-chip microcomputer (1) is connected with resistance R 4 one ends, the other end of resistance R 4 is connected with the base stage of interlocking pipe Q8, one end of described resistance R 5 is connected on the connected node that resistance R 4 is connected with the second output port, the other end is connected with the base stage of crossover connection Q5, the collector electrode of described crossover connection Q5 is connected with resistance R 7 one ends, the other end of described resistance R 7 is connected with the base stage of power tube Q2, the emitter of described crossover connection Q5 is connected with the collector electrode of interlocking pipe Q7, the emitter of described interlocking pipe Q7 is connected with the emitter of power tube Q3, the base stage of described power tube Q3 is connected on the connected node of emitter of the collector electrode of interlocking pipe Q7 and power tube Q5, the collector electrode of described crossover connection Q6 is connected with resistance R 6 one ends, the other end of described resistance R 6 is connected with the base stage of power tube Q1, the emitter of described crossover connection Q6 is connected with the collector electrode of interlocking pipe Q8, the emitter of described interlocking pipe Q8 is connected with the emitter of power tube Q4, the base stage of described power tube Q4 is connected on the connected node of emitter of the collector electrode of interlocking pipe Q8 and power tube Q6.

4. the control circuit of LED Holiday lamp according to claim 3, is characterized in that, the resistance of described resistance R 2 is greater than resistance R 3.

5. the control circuit of LED Holiday lamp according to claim 3, is characterized in that, the resistance of described resistance R 5 is greater than resistance R 4.

6. the control circuit of LED Holiday lamp according to claim 1, is characterized in that, described power input is connected with current rectifying and wave filtering circuit.

7. the control circuit of LED Holiday lamp according to claim 6, is characterized in that, described power input is connected with Switching Power Supply or the power supply of appendiron core transformer rectifying and wave-filtering.