CN101742770B - LED light dimming circuit - Google Patents

LED light dimming circuit Download PDF

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Publication number
CN101742770B
CN101742770B CN 200910189286 CN200910189286A CN101742770B CN 101742770 B CN101742770 B CN 101742770B CN 200910189286 CN200910189286 CN 200910189286 CN 200910189286 A CN200910189286 A CN 200910189286A CN 101742770 B CN101742770 B CN 101742770B
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resistance
triode
relay
output
counter
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CN101742770A (en
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周明杰
黄亚超
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Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Engineering Co Ltd
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Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Engineering Co Ltd
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Abstract

The invention provides an LED light dimming circuit suitable for the field of LED driving, comprising a power module, a control module and a driving module which are sequentially connected, wherein the power end of the driving module is connected to the output end of the power module; the output end of the driving module is connected with an LED lighting slab; the control module comprises a counter and a switch unit connected to the output end of the counter; the output end of the switch unit is connected to the input end of the driving module; the counter outputs control signals according toa plurality of externally input key signals and controls the switch-on of the switch unit; when the counter receives the last key signal, the counter is reset; and the driving module regulates the light intensity of the LED lighting slab according to the switch-on control of the switch unit. The LED light dimming circuit adopts the counter to output the control signals according to the plurality of externally input key signals and control the driving module to regulate the light intensity of the LED lighting slab and has the advantages of low cost, stable property, little interference, simplicity, reliability and high practicality.

Description

A kind of LED light adjusting circuit
Technical field
The invention belongs to LED and drive the field, relate in particular to a kind of LED light adjusting circuit.
Background technology
The drive circuit of existing LED light fixture generally all is to adopt Switching Power Supply, Switching Power Supply is at Electro Magnetic Compatibility (Electromagnetic Compatibility, EMC) aspect all is difficult to accomplish perfection, always can disturb more or less miscellaneous equipment or be subjected to the interference of miscellaneous equipment; Particularly in the situation that circuit malfunction just disturbs more easily generation.
In addition, the dimming function of existing LED light fixture changes the LED curtage by knob formula potentiometer to be realized, perhaps goes to realize by single chip machine controlling circuit; If adopt potentiometer to realize dimming function, although simple, there is extra power loss in potentiometer, causes that cost is high, unstable properties; If adopt single-chip microcomputer to control the light modulation of LED, although reliable, slightly aobvious complicated, consider that from the angle of cost and maintenance weak point is arranged.
Summary of the invention
The purpose of the embodiment of the invention be to provide a kind of simple and reliable, cost is low, disturb little LED light adjusting circuit.
The embodiment of the invention is to realize like this, a kind of LED light adjusting circuit, it comprises power module, control module and the driver module that connects in turn, and the power end of described driver module is connected to the output of described power module, and the output of described driver module connects the LED luminous plaque; Described control module comprises:
Counter U3 and the switch element that is connected to the output of described counter U3, the output of described switch element is connected to the input of described driver module;
Described counter U3 exports control signals according to a plurality of push button signallings of outside input and controls the conducting of described switch element; When described counter U3 received last push button signalling, described counter U3 resetted; Described driver module is regulated the light intensity of described LED luminous plaque according to the conducting control of described switch element;
Described control module also comprises:
The second voltage regulation unit, resistance R 2, resistance R 3, capacitor C 2, resistance R 1;
The input of described the second voltage regulation unit is connected to the output of described power module, the analog level sampling end ground connection of described the second voltage regulation unit, and the output of described the second voltage regulation unit is connected to the power end of described counter;
One end of described resistance R 1 connects outside light modulation button, and the other end of described resistance R 1 is by described capacitor C 2 ground connection, and described resistance R 1 is connected to described counter clock signal end with the end that is connected in series of described capacitor C 1;
Described resistance R 2 is connected between the clock signal terminal and ground of described counter U3;
Described resistance R 3 is connected between the Enable Pin and ground of described counter U3.
Further, described switch element comprises: triode Q2, triode Q3, resistance R 11, resistance R 12, resistance R 16, resistance R 17 and resistance R 18; The base stage of described triode Q2 is connected to the first output of described counter U3 by described resistance R 17, the base stage of described triode Q2 is also by described resistance R 11 ground connection, the grounded emitter of described triode Q2, the collector electrode A2 of described triode Q2 is connected to the first input end of described driver module; The base stage of described triode Q3 is connected to the second output of described counter U3 by described resistance R 16, the base stage of described triode Q3 is also by described resistance R 12 ground connection, the grounded emitter of described triode Q3, the collector electrode A3 of described triode Q3 is connected to the second input of described driver module; Described resistance R 18 is connected between the 3rd output and reset terminal of described counter U3.
Further, described driver module comprises: the first voltage regulation unit, the first relay, the second relay, resistance R 9, resistance R 10, resistance R 22 and resistance R 23; The input of described the first voltage regulation unit is connected to the output of described power module; One end of the coil of described the first relay is connected to the output of described power module, the other end of the coil of described the first relay is connected to the collector electrode of described triode Q2 by described resistance R 22, the Chang Kaiduan of described the first relay is connected to the output of described the first voltage regulation unit by resistance R 9, the normal-closed end of described the first relay is connected to the input of described LED luminous plaque; One end of the coil of described the second relay K 2 is connected to the output of described power module, the other end of the coil of described the second relay K 2 is connected to the collector electrode of described triode Q3 by described resistance R 23, the Chang Kaiduan of described the second relay is connected to the output of described the first voltage regulation unit by resistance R 10, the normal-closed end of described the second relay is connected to the input of described LED luminous plaque.
Further, described switch element also comprises: triode Q1, resistance R 5, resistance R 6, resistance R 7, resistance R 8 and resistance R 13; The base stage of described triode Q1 is connected to the 4th output of described counter by described resistance R 6, the base stage of described triode Q1 is also by described resistance R 13 ground connection, the grounded emitter of described triode Q1, the collector electrode of described triode Q1 are connected to the 3rd input of described driver module; Described resistance R 7 is connected between the base stage of the first output of described counter and described triode Q3; Described resistance R 8 is connected between the base stage of the 3rd output of described counter and described triode Q2; Described resistance R 5 is connected between the 5th output and reset terminal of described counter.
Further, described switch element comprises: triode Q1, triode Q2, triode Q3, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 11, resistance R 12 and resistance R 13; The base stage of described triode Q1 is connected to the 4th output of described counter by described resistance R 6, the base stage of described triode Q1 is also by described resistance R 13 ground connection, the grounded emitter of described triode Q1, the collector electrode A1 of described triode Q1 is connected to the 3rd input of described driver module; The base stage of described triode Q2 is connected to the 3rd output of described counter by described resistance R 8, the base stage of described triode Q2 is also by described resistance R 11 ground connection, the grounded emitter of described triode Q2, the collector electrode of described triode Q2 is connected to the first input end of described driver module; The base stage of described triode Q3 is connected to the first output of described counter by described resistance R 7, the base stage of described triode Q3 is also by described resistance R 12 ground connection, the grounded emitter of described triode Q3, the collector electrode of described triode Q3 are connected to the second input of described driver module; Described resistance R 5 is connected between the 5th output and reset terminal of described counter.
Further, described driver module comprises: the first voltage regulation unit, the first relay, the second relay, the 3rd relay, resistance R 4, resistance R 9, resistance R 10, resistance R 21, resistance R 22 and resistance R 23; The input of described the first voltage regulation unit is connected to the output of described power module; One end of the coil of described the first relay is connected to the output of described power module, the other end of the coil of described the first relay is connected to the collector electrode of described triode Q2 by described resistance R 22, the Chang Kaiduan of described the first relay is connected to the output of described the first voltage regulation unit by resistance R 9, the normal-closed end of described the first relay is connected to the input of described LED luminous plaque; One end of the coil of described the second relay is connected to the output of described power module, the other end of the coil of described the second relay is connected to the collector electrode of described triode Q3 by described resistance R 23, the Chang Kaiduan of described the second relay is connected to the output of described the first voltage regulation unit by resistance R 10, the normal-closed end of described the second relay is connected to the input of described LED luminous plaque; One end of the coil of described the 3rd relay is connected to the output of described power module, the other end of the coil of described the 3rd relay is connected to the collector electrode of described triode Q1 by described resistance R 21, the Chang Kaiduan of described the 3rd relay is connected to the output of described the first voltage regulation unit by resistance R 4, the Chang Kaiduan of described the 3rd relay also is connected to the analog level sampling end of described the first voltage regulation unit, and the normal-closed end of described the 3rd relay is connected to the input of described LED luminous plaque.
Further, described driver module also comprises: diode D2, diode D3 and diode D4; The negative electrode of described diode D2 is connected to an end of the coil of described the 3rd relay, and the anodic bonding of described diode D2 is to the other end of the coil of described the 3rd relay; The negative electrode of described diode D3 is connected to an end of the coil of described the first relay, and the anodic bonding of described diode D3 is to the other end of the coil of described the first relay; The negative electrode of described diode D4 is connected to an end of the coil of described the second relay, and the anodic bonding of described diode D4 is to the other end of the coil of described the second relay.
Further, described control module also comprises: resistance R 14 and diode D5; The negative electrode of described diode D5 is connected to the output of described power module, the plus earth of described diode D5 by described resistance R 14; The link of described diode D5 and described resistance R 14 is connected to the input of described the second voltage regulation unit.
LED light adjusting circuit provided by the invention adopts counter U3 according to a plurality of push button signalling output control signals of outside input and controls driver module the light intensity of LED luminous plaque is regulated; Cost is low, stable performance, interference are little, simple and reliable, practical.
Description of drawings
Fig. 1 is the modular structure schematic diagram of the LED light adjusting circuit that provides of the embodiment of the invention;
Fig. 2 is the circuit diagram of control module in the LED light adjusting circuit that provides of the embodiment of the invention;
Fig. 3 is the circuit diagram of driver module in the LED light adjusting circuit that provides of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
The LED light adjusting circuit that the embodiment of the invention provides adopts counter U3 according to a plurality of push button signalling output control signals of outside input and controls driver module the light intensity of LED luminous plaque is regulated; Cost is low, stable performance, interference are little, simple and reliable, practical.
Fig. 1 shows the modular structure of the LED light adjusting circuit that the embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with the embodiment of the invention, and details are as follows:
It comprises power module 1, control module 2 and the driver module 3 that connects in turn the LED light adjusting circuit, and wherein the power end of driver module 3 is connected to the output of power module 1, and the output of driver module 3 connects LED luminous plaque 4.Control module 2 comprises: counter U3 and the switch element that is connected to the output of counter U3, and the output of switch element is connected to the input of driver module 3; Counter U3 is according to a plurality of push button signalling output control signals of outside input and the conducting of control switch unit; When counter U3 received last push button signalling, counter U3 resetted; Driver module is regulated the light intensity of LED luminous plaque 4 according to the conducting control of switch element.
Power module 1 comprises rectification unit D1 and filter capacitor C1, binding post J1 is the power interface of external AC/DC24V, by this interface J1 input voltage, after passing through again rectification unit D1 rectification, carrying out filtering through filter capacitor C1 processes, power supply becomes stable supply power voltage, for control module 2 and driver module 3 provide stable, reliable DC power supply.
The physical circuit of control module 2 as shown in Figure 2, the physical circuit of driver module 3 for convenience of explanation, only shows the part relevant with the embodiment of the invention as shown in Figure 3, details are as follows.
Counter U3 comprises 16 pins, the pin 16 of its Counter U3 is power end VCC, pin 15 is reset terminal RST, pin 14 is clock signal terminal CLK, pin 13 is Enable Pin ENA, pin 12 is for overflowing end or carry end CO, and pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, pin 7, pin 9, pin 10, pin 11 are the output of 10 digit counters; Pin 4 is the first output, and pin 2 is the second output, and pin 7 is the 3rd output, and pin 3 is the 4th output, and pin 10 is the 5th output; Pin 8 is earth terminal GND; The pin 1,5,6,9,11,12 of counter U3 is all unsettled not to be connect, the clock signal terminal CLK of counter U3 (pin 14) is connected to the output of binding post J3 by resistance R 1, the power end of binding post J3 connects power supply VCC, and the input of binding post J3 connects outside light modulation button; 2 pairs of push button signallings of capacitor C strobe; The Enable Pin ENA of counter U3 (pin 13) powers on counter U3 rear just in running order by resistance R 3 ground connection; The power end VCC of counter U3 (pin 16) is connected to the output end vo ut of the second voltage regulation unit U1; Ground end GND (pin 8) ground connection of counter U3.
The LED light adjusting circuit that the embodiment of the invention provides can carry out the third gear brightness adjustment control to LED luminous plaque 4, also can carry out the fourth gear brightness adjustment control to LED luminous plaque 4, simultaneously compatible third gear and fourth gear brightness adjustment control.
In the embodiment of the invention, when the LED light adjusting circuit carried out the third gear brightness adjustment control to LED luminous plaque 4, switch element comprised: triode Q2, triode Q3, resistance R 11, resistance R 12, resistance R 16, resistance R 17 and resistance R 18; The base stage of triode Q2 is connected to the first output (pin 4) of counter U3 by resistance R 17, the base stage of triode Q2 is also by described resistance R 11 ground connection, the grounded emitter of triode Q2, the collector electrode A2 of triode Q2 is connected to the first input end of driver module 3; The base stage of triode Q3 is connected to the second output (pin 2) of counter U3 by resistance R 16, the base stage of triode Q3 is also by resistance R 12 ground connection, the grounded emitter of triode Q3, the collector electrode A3 of triode Q3 is connected to the second input of driver module 3; Resistance R 18 is connected between the 3rd output (pin 7) and reset terminal (pin 15) of counter U3.
Driver module 3 comprises: the first voltage regulation unit U2, the first relay K 1, the second relay K 2, resistance R 9, resistance R 10, resistance R 22 and resistance R 23; The input of the first voltage regulation unit U2 is connected to the output of power module; One end of the coil of the first relay K 1 is connected to the output of power module 1, the other end of the coil of the first relay K 1 is connected to the collector electrode A2 of triode Q2 by resistance R 22, the Chang Kaiduan of the first relay K 1 is connected to the output of the first voltage regulation unit U2 by resistance R 9, the normal-closed end of the first relay K 1 is connected to the input of LED luminous plaque 4; One end of the coil of the second relay K 2 is connected to the output of power module 1, the other end of the coil of the second relay K 2 is connected to the collector electrode A3 of triode Q3 by resistance R 23, the Chang Kaiduan of the second relay K 2 is connected to the output of the first voltage regulation unit U2 by resistance R 10, the normal-closed end of the second relay K 2 is connected to the input of LED luminous plaque 4.
For the LED light adjusting circuit with third gear dimming control function that illustrates that further the embodiment of the invention provides, existing in conjunction with Fig. 2 and Fig. 3 in detail its operation principle to be described in detail as follows:
The Q1 end (the second output pin 2) of counter U3 is by the base stage of resistance R 16 connecting triode Q3, control triode Q3 opens and shuts off, the Q2 end (the first output pin 4) of counter U3 is by the base stage of resistance R 17 connecting triode Q2, control triode Q2 opens and shuts off, the Q3 end (the 3rd output pin 7) of counter U3 is connected with the reset terminal (reset terminal pin 15) 1 of counter U3 by resistance R 18, make counter U3 when receiving the 3rd push button signalling, counter U3 resets, and is in again count status.The collector electrode of triode Q2 is connected with the first relay K 1 in the driver module 3 by resistance R 22; The collector electrode of triode Q3 is connected with the second relay K 2 in the driver module 3 by resistance R 23.When light fixture powered on, the 3rd relay K 3 had connected, and resistance R 4 conductings are set, and the electric current of the first voltage regulation unit U2 output 40mA is also lighted LED luminous plaque 4, and the light that this moment, LED luminous plaque 4 sent is in low light level state; Again press the light modulation button that is connected on the binding post J3, the second relay K 2 normal open switch are closed, after resistance R 10 being set and R4 being in parallel, make the electric current of the first voltage regulation unit U2 output 70mA, and the light that LED luminous plaque 4 sends is in middle light state; Again press the light modulation button that is connected on the binding post J3, the first relay K 1 closure, the second relay K 2 disconnects, and resistance R 9 is set in parallel with resistance R 4, makes the electric current of the first voltage regulation unit U2 output 330mA, and the light that LED luminous plaque 4 sends is in the high light state; Again press the light modulation button that is connected on the binding post J3, the first relay K 1, K2 switch disconnect, and the light that LED luminous plaque 4 sends is in low light level state; The light modulation button is pressed in circulation successively, and the light that LED luminous plaque 4 sends is in the low light level, middle light, three kinds of states of high light successively.
In the embodiment of the invention, when the LED light adjusting circuit carried out the fourth gear brightness adjustment control to LED luminous plaque 4, switch element comprised: triode Q1, triode Q2, triode Q3, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 11, resistance R 12 and resistance R 13; The base stage of triode Q1 is connected to the 4th output (pin 3) of counter U3 by resistance R 6, the base stage of triode Q1 is also by resistance R 13 ground connection, the grounded emitter of triode Q1, the collector electrode A1 of triode Q1 is connected to the 3rd input of driver module 3; The base stage of triode Q2 is connected to the 3rd output (pin 7) of counter U3 by resistance R 8, the base stage of triode Q2 is also by described resistance R 11 ground connection, the grounded emitter of triode Q2, the collector electrode A2 of triode Q2 is connected to the first input end of driver module 3; The base stage of triode Q3 is connected to the first output (pin 4) of counter U3 by resistance R 7, the base stage of triode Q3 is also by resistance R 12 ground connection, the grounded emitter of triode Q3, the collector electrode A3 of triode Q3 is connected to the second input of driver module 3; Resistance R 5 is connected between the 5th output (pin 10) and reset terminal (pin 15) of counter U3.
Driver module 3 comprises: the first voltage regulation unit U2, the first relay K 1, the second relay K 2, the 3rd relay K 3, resistance R 4, resistance R 9, resistance R 10, resistance R 21, resistance R 22 and resistance R 23; The input of the first voltage regulation unit U2 is connected to the output of power module 1; One end of the coil of the first relay K 1 is connected to the output of power module 1, the other end of the coil of the first relay K 1 is connected to the collector electrode A2 of triode Q2 by resistance R 22, the Chang Kaiduan of the first relay K 1 is connected to the output of the first voltage regulation unit U2 by resistance R 9, the normal-closed end of the first relay K 1 is connected to the input of LED luminous plaque 4; One end of the coil of the second relay K 2 is connected to the output of power module 1, the other end of the coil of the second relay K 2 is connected to the collector electrode A3 of triode Q3 by resistance R 23, the Chang Kaiduan of the second relay K 2 is connected to the output of the first voltage regulation unit U2 by resistance R 10, the normal-closed end of the second relay K 2 is connected to the input of LED luminous plaque 4; One end of the coil of the 3rd relay K 3 is connected to the output of power module 1, the other end of the coil of the 3rd relay K 3 is connected to the collector electrode A1 of triode Q1 by resistance R 21, the Chang Kaiduan of the 3rd relay K 3 is connected to the output of the first voltage regulation unit U2 by resistance R 4, the Chang Kaiduan of the 3rd relay K 3 also is connected to the analog level sampling end ADJ pin of the first voltage regulation unit U2, and the normal-closed end of the 3rd relay K 3 is connected to the input of LED luminous plaque 4.
For the LED light adjusting circuit with fourth gear dimming control function that illustrates that further the embodiment of the invention provides, existing in conjunction with Fig. 2 and Fig. 3 in detail its operation principle to be described in detail as follows:
The Q0 end (the 4th output pin 3) of counter U3 is connected with the base stage of triode Q1 by resistance R 6, and control triode Q1 opens and shuts off; The Q2 end (the first output pin 4) of counter U3 is connected to the base stage of triode Q3 by resistance R 7, control triode Q3 opens and shuts off; The Q3 end (the 3rd output pin 7) of counter U3 is connected to the base stage of triode Q2 by resistance R 8, control triode Q2 opens and shuts off; The Q4 end (the 5th output pin 10) of counter U3 is connected with the reset terminal (reset terminal pin 15) of counter U3 by resistance R 5, makes counter U3 when receiving the 4th push button signalling, and counter U3 resets, and is in again count status.When light fixture powers on, the first relay K 1 of counter U3 control, the second relay K 2, the 3rd relay K 3 all disconnect with LED luminous plaque 4, LED luminous plaque 4 is in the state of going out, when pressing the light modulation button, the normally closed switch of the 3rd relay K 3 is closed, resistance R 4 conductings are set, and the electric current of the first voltage regulation unit U2 output 40mA is also lighted LED luminous plaque 4, and LED luminous plaque 4 is in low light level state; Again press the light modulation button, the second relay K 2 normal open switch are closed, arrange resistance R 10 and resistance R 4 in parallel after, make the first voltage regulation unit U2 export the 70mA electric current, LED luminous plaque 4 is in middle light state; Again press the light modulation button, the first relay K 1 closure, the second relay K 2 disconnects, and resistance R 9 is set in parallel with resistance R 4, makes the first voltage regulation unit U2 output 330mA electric current, and LED luminous plaque 4 is in the high light state; Again press the light modulation button, relay all disconnects with LED luminous plaque 4, and LED luminous plaque 4 is in the state of going out.The light modulation button is pressed in circulation successively, and LED luminous plaque 4 will be in successively and go out, the low light level, middle light, four kinds of states of high light.
In the embodiment of the invention, when the LED light adjusting circuit to LED luminous plaque 4 simultaneously when compatible third gear and fourth gear brightness adjustment control, switch element comprises: triode Q1, triode Q2, triode Q3, resistance R 5, resistance R 6 resistance R 7, resistance R 8, resistance R 11, resistance R 12, resistance R 13, resistance R 16, resistance R 17 and resistance R 18; Wherein, the base stage of triode Q2 is connected to the first output (pin 4) of counter U3 by resistance R 17, the base stage of triode Q2 is also passed through resistance R 11 ground connection, the grounded emitter of triode Q2, and the collector electrode A2 of triode Q2 is connected to the first input end of driver module 3; The base stage of triode Q3 is connected to the second output (pin 2) of counter U3 by resistance R 16, the base stage of triode Q3 is also by resistance R 12 ground connection, the grounded emitter of triode Q3, the collector electrode A3 of triode Q3 is connected to the second input of driver module 3; Resistance R 18 is connected between the 3rd output (pin 7) and reset terminal (pin 15) of counter U3; The base stage of triode Q1 is connected to the 4th output (pin 3) of counter U3 by resistance R 6, the base stage of triode Q1 is also by resistance R 13 ground connection, the grounded emitter of triode Q1, the collector electrode A1 of triode Q1 is connected to the 3rd input of driver module 3; Resistance R 7 is connected between the base stage of the first output (pin) 4 of counter U3 and triode Q3; Resistance R 8 is connected between the base stage of the 3rd output (pin 7) of counter U3 and triode Q2; Resistance R 5 is connected between the 5th output (pin 10) and reset terminal (pin 15) of counter U3.
Driver module 3 comprises: the first voltage regulation unit U2, the first relay K 1, the second relay K 2, the 3rd relay K 3, resistance R 4, resistance R 9, resistance R 10, resistance R 21, resistance R 22 and resistance R 23; The input of the first voltage regulation unit U2 is connected to the output of power module 1; One end of the coil of the first relay K 1 is connected to the output of power module 1, the other end of the coil of the first relay K 1 is connected to the collector electrode A2 of triode Q2 by resistance R 22, the Chang Kaiduan of the first relay K 1 is connected to the output of the first voltage regulation unit U2 by resistance R 9, the Chang Kaiduan of the first relay K 1 is connected to the input of LED luminous plaque 4; One end of the coil of the second relay K 2 is connected to the output of power module 1, the other end of the coil of the second relay K 2 is connected to the collector electrode A3 of triode Q3 by resistance R 23, the Chang Kaiduan of the second relay K 2 is connected to the output of the first voltage regulation unit U2 by resistance R 10, the Chang Kaiduan of the second relay K 2 is connected to the input of LED luminous plaque 4; One end of the coil of the 3rd relay K 3 is connected to the output of power module 1, the other end of the coil of the 3rd relay K 3 is connected to the collector electrode A1 of triode Q1 by resistance R 21, the Chang Kaiduan of the 3rd relay K 3 is connected to the output of the first voltage regulation unit U2 by resistance R 4, the Chang Kaiduan of the 3rd relay K 3 also is connected to the analog level sampling end ADJ pin of the first voltage regulation unit U2, and the normal-closed end of the 3rd relay K 3 is connected to the input of LED luminous plaque 4.
In embodiments of the present invention, the operation principle front of the LED light adjusting circuit of compatible third gear and fourth gear brightness adjustment control is described in detail simultaneously, does not repeat them here.The LED light adjusting circuit that the embodiment of the invention provides adopts simple counter U3 to realize dimming control function; Overcome interference problem, do not had the control of single-chip microcomputer complexity; Can accomplish third gear, fourth gear light modulation compatibility; Cost is low, simple and reliable; Satisfy the ask for something light fixture fully and disturbed the customer demand little, that cost performance is high.
In embodiments of the present invention, control module 2 also comprises: the second voltage regulation unit U1, resistance R 2, resistance R 3, capacitor C 2, resistance R 1; The input Vin of the second voltage regulation unit U1 is connected to the output of power module 1, the analog level sampling end ADJ pin ground connection of the second voltage regulation unit U1, and the output end vo ut of the second voltage regulation unit U1 is connected to the power end of counter U3 (pin 16); One end of resistance R 1 connects outside light modulation button, and the other end of resistance R 1 is by capacitor C 2 ground connection, and resistance R 1 is connected to counter U3 clock signal terminal (pin 14) with the end that is connected in series of capacitor C 1; Resistance R 2 is connected between the clock signal terminal (pin 14) and ground of counter U3; Resistance R 3 is connected between the Enable Pin (pin 13) and ground of counter U3.
As one embodiment of the present of invention, it is the voltage stabilizing chip of 78L05 that the second voltage regulation unit U1 can adopt model, and the voltage transitions that power module 1 is exported is that stable 5V output voltage uses for counter U3.
As the present invention embodiment, control module 2 also comprises: resistance R 14 and diode D5; The negative electrode of diode D5 is connected to the output of power module 1, the plus earth of diode D5 by resistance R 14; The link of diode D5 and resistance R 14 is connected to the input Vin of the second voltage regulation unit U1.Wherein resistance R 14 and diode D5 have been the effects of protection the second voltage regulation unit U1, can prevent the second voltage regulation unit U1 overvoltage and burn out.
In embodiments of the present invention, driver module 3 also comprises: diode D2, diode D3 and diode D4; The negative electrode of diode D2 is connected to an end of the coil of the 3rd relay K 3, the other end of the coil of anodic bonding to the three relay K 3 of diode D2; The negative electrode of diode D3 is connected to an end of the coil of the first relay K 1, the other end of the coil of anodic bonding to the first relay K 1 of diode D3; The negative electrode of diode D4 is connected to an end of the coil of the second relay K 2, the other end of the coil of anodic bonding to the second relay K 2 of diode D4.
The LED light adjusting circuit that the embodiment of the invention provides adopts counter U3 according to a plurality of push button signalling output control signals of outside input and controls driver module the light intensity of LED luminous plaque is regulated; Cost is low, stable performance, interference are little, simple and reliable, practical.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.

Claims (8)

1. LED light adjusting circuit, it comprises power module, control module and the driver module that connects in turn, and the power end of described driver module is connected to the output of described power module, and the output of described driver module connects the LED luminous plaque; It is characterized in that, described control module comprises:
Counter and the switch element that is connected to the output of described counter, the output of described switch element is connected to the input of described driver module;
Described counter is exported control signals according to a plurality of push button signallings of outside input and is controlled the conducting of described switch element; When described counter received last push button signalling, described counter resetted; Described driver module is regulated the light intensity of described LED luminous plaque according to the conducting control of described switch element;
Described control module also comprises:
The second voltage regulation unit, resistance R 2, resistance R 3, capacitor C 2, resistance R 1;
The input of described the second voltage regulation unit is connected to the output of described power module, the analog level sampling end ground connection of described the second voltage regulation unit, and the output of described the second voltage regulation unit is connected to the power end of described counter;
One end of described resistance R 1 connects outside light modulation button, and the other end of described resistance R 1 is by described capacitor C 2 ground connection, and described resistance R 1 is connected to described counter clock signal end with the end that is connected in series of described capacitor C 1;
Described resistance R 2 is connected between the clock signal terminal and ground of described counter;
Described resistance R 3 is connected between the Enable Pin and ground of described counter.
2. LED light adjusting circuit as claimed in claim 1 is characterized in that, described switch element comprises:
Triode Q2, triode Q3, resistance R 11, resistance R 12, resistance R 16, resistance R 17 and resistance R 18;
The base stage of described triode Q2 is connected to the first output of described counter by described resistance R 17, the base stage of described triode Q2 is also by described resistance R 11 ground connection, the grounded emitter of described triode Q2, the collector electrode of described triode Q2 is connected to the first input end of described driver module;
The base stage of described triode Q3 is connected to the second output of described counter by described resistance R 16, the base stage of described triode Q3 is also by described resistance R 12 ground connection, the grounded emitter of described triode Q3, the collector electrode of described triode Q3 are connected to the second input of described driver module;
Described resistance R 18 is connected between the 3rd output and reset terminal of described counter.
3. LED light adjusting circuit as claimed in claim 2 is characterized in that, described driver module comprises:
The first voltage regulation unit, the first relay, the second relay, resistance R 9, resistance R 10, resistance R 22 and resistance R 23;
The input of described the first voltage regulation unit is connected to the output of described power module;
One end of the coil of described the first relay is connected to the output of described power module, the other end of the coil of described the first relay is connected to the collector electrode of described triode Q2 by described resistance R 22, the Chang Kaiduan of described the first relay is connected to the output of described the first voltage regulation unit by resistance R 9, the normal-closed end of described the first relay is connected to the input of described LED luminous plaque;
One end of the coil of described the second relay is connected to the output of described power module, the other end of the coil of described the second relay is connected to the collector electrode of described triode Q3 by described resistance R 23, the Chang Kaiduan of described the second relay is connected to the output of described the first voltage regulation unit by resistance R 10, the normal-closed end of described the second relay is connected to the input of described LED luminous plaque.
4. LED light adjusting circuit as claimed in claim 2 is characterized in that, described switch element also comprises:
Triode Q1, resistance R 5, resistance R 6, resistance R 7, resistance R 8 and resistance R 13;
The base stage of described triode Q1 is connected to the 4th output of described counter by described resistance R 6, the base stage of described triode Q1 is also by described resistance R 13 ground connection, the grounded emitter of described triode Q1, the collector electrode of described triode Q1 are connected to the 3rd input of described driver module;
Described resistance R 7 is connected between the base stage of the first output of described counter and described triode Q3;
Described resistance R 8 is connected between the base stage of the 3rd output of described counter and described triode Q2;
Described resistance R 5 is connected between the 5th output and reset terminal of described counter.
5. LED light adjusting circuit as claimed in claim 1 is characterized in that, described switch element comprises:
Triode Q1, triode Q2, triode Q3, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 11, resistance R 12 and resistance R 13;
The base stage of described triode Q1 is connected to the 4th output of described counter by described resistance R 6, the base stage of described triode Q1 is also by described resistance R 13 ground connection, the grounded emitter of described triode Q1, the collector electrode of described triode Q1 are connected to the 3rd input of described driver module;
The base stage of described triode Q2 is connected to the 3rd output of described counter by described resistance R 8, the base stage of described triode Q2 is also by described resistance R 11 ground connection, the grounded emitter of described triode Q2, the collector electrode of described triode Q2 is connected to the first input end of described driver module;
The base stage of described triode Q3 is connected to the first output of described counter by described resistance R 7, the base stage of described triode Q3 is also by described resistance R 12 ground connection, the grounded emitter of described triode Q3, the collector electrode of described triode Q3 are connected to the second input of described driver module;
Described resistance R 5 is connected between the 5th output and reset terminal of described counter.
6. such as claim 4 or 5 described LED light adjusting circuits, it is characterized in that, described driver module comprises:
The first voltage regulation unit, the first relay, the second relay, the 3rd relay, resistance R 4, resistance R 9, resistance R 10, resistance R 21, resistance R 22 and resistance R 23;
The input of described the first voltage regulation unit is connected to the output of described power module;
One end of the coil of described the first relay is connected to the output of described power module, the other end of the coil of described the first relay is connected to the collector electrode of described triode Q2 by described resistance R 22, the Chang Kaiduan of described the first relay is connected to the output of described the first voltage regulation unit by resistance R 9, the normal-closed end of described the first relay is connected to the input of described LED luminous plaque;
One end of the coil of described the second relay is connected to the output of described power module, the other end of the coil of described the second relay is connected to the collector electrode of described triode Q3 by described resistance R 23, the Chang Kaiduan of described the second relay is connected to the output of described the first voltage regulation unit by resistance R 10, the normal-closed end of described the second relay is connected to the input of described LED luminous plaque;
One end of the coil of described the 3rd relay is connected to the output of described power module, the other end of the coil of described the 3rd relay is connected to the collector electrode of described triode Q1 by described resistance R 21, the Chang Kaiduan of described the 3rd relay is connected to the output of described the first voltage regulation unit by resistance R 4, the Chang Kaiduan of described the 3rd relay also is connected to the analog level sampling end of described the first voltage regulation unit, and the normal-closed end of described the 3rd relay is connected to the input of described LED luminous plaque.
7. LED light adjusting circuit as claimed in claim 6 is characterized in that, described driver module also comprises:
Diode D2, diode D3 and diode D4;
The negative electrode of described diode D2 is connected to an end of the coil of described the 3rd relay, and the anodic bonding of described diode D2 is to the other end of the coil of described the 3rd relay;
The negative electrode of described diode D3 is connected to an end of the coil of described the first relay, and the anodic bonding of described diode D3 is to the other end of the coil of described the first relay;
The negative electrode of described diode D4 is connected to an end of the coil of described the second relay, and the anodic bonding of described diode D4 is to the other end of the coil of described the second relay.
8. LED light adjusting circuit as claimed in claim 1 is characterized in that, described control module also comprises: resistance R 14 and diode D5;
The negative electrode of described diode D5 is connected to the output of described power module, the plus earth of described diode D5 by described resistance R 14;
The link of described diode D5 and described resistance R 14 is connected to the input of described the second voltage regulation unit.
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CN101909388B (en) * 2010-06-30 2013-11-27 海洋王照明科技股份有限公司 Sign light circuit and sign light
CN201884990U (en) * 2010-10-27 2011-06-29 漳州灿坤实业有限公司 LED (light-emitting diode) lamp utilizing switch to adjust light
CN102480815B (en) * 2010-11-23 2015-07-08 海洋王照明科技股份有限公司 LED (light emitting diode) dimming drive circuit
CN102595726B (en) * 2012-02-14 2014-02-12 深圳市讯宇创科技有限公司 Emergency lighting circuit and emergency lighting system
CN103379711B (en) * 2012-04-23 2015-06-03 Ad技术有限公司 LED lighting device
CN107682961A (en) * 2017-10-20 2018-02-09 佛山市长晶电子科技有限公司 A kind of LED fishing lamps power supply output switching circuit

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CN2075841U (en) * 1990-03-26 1991-04-24 孙东海 Touch type light adjusting device
CN2636583Y (en) * 2003-06-13 2004-08-25 龙裕斌 High performance remote control dimming electron ballast
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