CN206963154U - By the control circuit for detecting power switch action regulation light-source brightness - Google Patents

By the control circuit for detecting power switch action regulation light-source brightness Download PDF

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Publication number
CN206963154U
CN206963154U CN201720921339.4U CN201720921339U CN206963154U CN 206963154 U CN206963154 U CN 206963154U CN 201720921339 U CN201720921339 U CN 201720921339U CN 206963154 U CN206963154 U CN 206963154U
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China
Prior art keywords
power switch
constant
voltage
resistance
drive circuit
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CN201720921339.4U
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Chinese (zh)
Inventor
夏虎
刘桂芝
黄年亚
王冬峰
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WUXI LINLI TECHNOLOGY Co Ltd
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WUXI LINLI TECHNOLOGY Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

The utility model discloses a kind of control circuit by detecting power switch action regulation light-source brightness, it is related to LED dimming control techniques field, including AC power, rectification circuit, LED string, constant-current drive circuit, power switch motion detection module and Timer module;AC power is converted into direct current and powered for LED string and constant-current drive circuit by the mould preparation block;The constant-current drive circuit is used for the electric current for controlling LED string;The Timer module carries out timing to power switch turn-off time, and sends control signal to constant-current drive circuit, the setting for constant-current drive circuit;Also include clock generating circuit, AC supply voltage signal is converted into synperiodic clock signal by clock generating circuit, and clock signal is delivered into Timer module, and Timer module carries out timing according to clock signal.The clock of power switch shut-off timer is directly determined by ac frequency, when multiple illuminators can be avoided used in parallel, because interior system clock is inconsistent, causes to dim the problem of electric current is inconsistent.

Description

By the control circuit for detecting power switch action regulation light-source brightness
Technical field
The present invention relates to family expenses dimming control technique field, and in particular to a kind of by detecting power switch action regulation light The control circuit of source brightness.
Background technology
The circuit of traditional detection power switch action, as shown in Figure 1 or shown in Fig. 2, when power switch disconnects, electricity The input voltage of source switch detection unit can be reduced to zero, and timer starts to count power switch turn-off time afterwards.Work as meter When device meter full specified time △ TOFF after, change lighting driving device output current and set, when power switch turns on again, shine Bright drive device output current changes into another arranges value.Specified time △ TOFF and lighting driving device internal oscillator clock Cycle T OSC is directly proportional, and △ TOFF=n*TOSC, each lighting driving device has oneself independent oscillator clock.
When controlling multichannel lighting driving device with power switch all the way, if the respective vibration of multichannel lighting driving device The device clock cycle, TOSC was inconsistent, it is possible to which when appearing in switching-on and switching-off state switching, some lighting driving devices have counted full finger Fixed time △ TOFF, and output current, which is set, have been changed, and some lighting driving device output circuits do not count full specified time △ TOFF, Output current, which is set, not to be changed.So as to cause the multichannel lighting driving device output current when power switch turns on again to differ Cause.
The content of the invention
The technical problem to be solved in the present invention is that solve above-mentioned the deficiencies in the prior art, there is provided one kind is shaken using AC power Signal is swung as clock source to come to power switch turn-off time timing, and it is defeated according to power switch action change lighting driving device Go out the control circuit of electric current.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is:It is a kind of to be acted by detecting power switch The control circuit of light-source brightness is adjusted, including AC power, rectification circuit, LED string, constant-current drive circuit, power switch move Make detection module and Timer module;The AC power supply module is powered for whole circuit system;The mould preparation block will exchange Power conversion is that direct current is LED string and constant-current drive circuit power supply;The constant-current drive circuit is used to control LED string Electric current;The power switch motion detection module sends trigger signal and starts to count to Timer module after power switch disconnection When, after power switch closure, reset signal is sent to Timer module by timer reset;The Timer module is opened power supply Turn off ETAD expected time of arrival and departure and carry out timing, and send control signal to constant-current drive circuit, the setting for constant-current drive circuit;Also include AC supply voltage signal is converted into synperiodic clock signal by clock generating circuit, clock generating circuit, and Clock signal is delivered to Timer module, Timer module carries out timing according to clock signal.
Further, the clock generating circuit includes electric capacity C7, resistance R7 and voltage-regulator diode D4, electric capacity C7 One end connects the negative pole of the live wire of AC power, other end connection R7 and voltage-regulator diode, resistance R7 and voltage-regulator diode Plus earth.
Further, the clock generating circuit includes resistance R8, resistance R7 and voltage-regulator diode D4, resistance R8 One end connects the negative pole of the live wire of AC power, other end connection R7 and voltage-regulator diode, resistance R7 and voltage-regulator diode Plus earth.
Further, in addition to a diode D3, resistance R5, resistance R6 and electric capacity C5, described diode D3 one end The live wire of AC power is connected, the other end connection resistance R5, R5 other end connection R6 and electric capacity C5, resistance R6 and electric capacity C5 connect Ground, electric capacity C5 connection power switch motion detection modules.
Further, output control switch S1~Sn of Timer module gating, VR magnitude of voltage is changed;It is described Constant-current drive circuit controls the electric current of LED string according to VR magnitude of voltage.
From above-mentioned technical proposal it can be seen that the utility model has advantages below:When timer full specified time △ After TOFF, change lighting driving device output current and set, when power switch turns on again, lighting driving device output current Change into another arranges value.Specified time △ TOFF is directly proportional to alternating current cycle of oscillation TAC, △ TOFF=n*TAC.
When controlling multichannel lighting driving device with power switch all the way, because during the timer of multichannel lighting driving device The clock cycle is equal to ac period TAC, so timing is not in difference, multichannel is shone after the switching of each switching-on and switching-off state The output current of bright drive device can be consistent.
Brief description of the drawings
Fig. 1 is the control circuit schematic diagram of the detection power switch action regulation light-source brightness of prior art;
Fig. 2 is the control circuit schematic diagram of the detection power switch action regulation light-source brightness of prior art
Fig. 3 is the circuit theory diagrams of the first embodiment of the present invention;
Fig. 4 is the circuit theory diagrams of second of embodiment of the present invention.
Fig. 5 is the constant-current drive circuit schematic diagram of the present invention.
Embodiment
The embodiment of the present invention is elaborated below in conjunction with accompanying drawing.
As shown in figure 3, the control circuit by detecting power switch action regulation light-source brightness of the present invention, mainly includes AC power, rectification circuit, LED string, constant-current drive circuit, power switch motion detection module, Timer module are with timely Clock signal generating circuit.AC power supply module is powered for whole circuit system, and alternating current uses 220V household electrics in the present embodiment.
AC power is converted into direct current and powered for LED string and constant-current drive circuit by the mould preparation block, rectification circuit For the rectifier bridge of four diode compositions.
Power switch motion detection module sends trigger signal and starts to count to Timer module after power switch disconnection When, after power switch closure, reset signal is sent to Timer module by timer reset, power switch motion detection module master Detect AC power power-down conditions, when the alternating voltage of input is power-down to OV, open timer, when device module to power supply Switch off-time carries out timing, and constant-current drive circuit is switched over according to the time that system is set, and such as sets when system is fallen Electricity continues 200ms, less than 5 seconds, then when power switch closes again, changes the input reference voltage of constant-current drive circuit, right LED current is switched over, and so as to be dimmed, repetition is analogized.If system power failure is persistently more than 5 seconds, Timer module is to perseverance The input reference voltage of stream drive circuit is resetted, and is reset to original state, i.e., first grade.Wherein 200ms, 5 seconds are citing Illustrate, do not provide constraints herein.
AC supply voltage signal is converted into synperiodic clock signal by clock generating circuit, and by clock signal Timer module is delivered to, Timer module carries out timing according to clock signal.One of which structure is as follows:Clock signal occurs Circuit includes electric capacity C7, resistance R7 and voltage-regulator diode D4, and electric capacity C7 one end connects the live wire of AC power, other end connection The plus earth of R7 and voltage-regulator diode negative pole, resistance R7 and voltage-regulator diode, the voltage signal on alternating current fire wire It is changed into low pressure clock CLK4 after C7, R7 and D4 processing, the cycle is alternating current cycle of oscillation, and low pressure clock CLK4 is as meter When device unit clock signal.
Electric capacity C7 can be wherein substituted for resistance R8, its concrete structure is as follows:As shown in figure 4, resistance R8 one end connects The positive pole of the negative pole of the live wire of AC power, other end connection R7 and voltage-regulator diode, resistance R7 and voltage-regulator diode connects Ground.
After timer full specified time △ TOFF, its output signal K1~Kn changes.Signal K1~Kn makes switch S1 ~Sn is gated, so as to change signal VR magnitudes of voltage.As signal VR magnitudes of voltage change, lighting driving device output current is changed Set, when power switch turns on again, lighting driving device output current changes into another arranges value.Specified time △ TOFF It is directly proportional to alternating current cycle of oscillation TAC, △ TOFF=n*TAC.
When controlling multichannel lighting driving device with power switch all the way, because during the timer of multichannel lighting driving device The clock cycle is equal to ac period TAC, so timing is not in difference, multichannel is shone after the switching of each switching-on and switching-off state The output current of bright drive device can be consistent.
The peripheral circuit of power switch start detection module is as follows:Including a diode D3, resistance R5, resistance R6 and Electric capacity C5, the live wire of diode D3 one end connection AC power, the other end connection resistance R5, R5 other end connection R6 and Electric capacity C5, resistance R6 and electric capacity C5 are grounded, electric capacity C5 connection power switch motion detection modules.
As shown in figure 5, it is a kind of constant-current drive circuit schematic diagram.Constant-current drive circuit is used for the electric current for controlling LED string, Reference input voltages of the signal VR as constant-current drive circuit.Constant-current drive circuit mainly includes current sampling resistor Rcs, amplification Device, high power metal-oxide-semiconductor, the negative terminal of current sampling resistor Rcs connection amplifiers, the anode of signal VR connection amplifiers, amplifier Output end connection high power metal-oxide-semiconductor grid.Constant-current drive circuit controls high power according to the magnitude of voltage of input VR signals The grid voltage of metal-oxide-semiconductor so that the average voltage on sampling resistor Rcs is equal with signal VR.Here it is ripe existing skill Art, herein without repeating.

Claims (5)

1. it is a kind of by detect power switch action regulation light-source brightness control circuit, including AC power, rectification circuit, LED string, reference voltage, constant-current drive circuit, power switch motion detection module and Timer module;
The AC power supply module is powered for whole circuit system;
AC power is converted into direct current and powered for LED string and constant-current drive circuit by the rectification module;
The constant-current drive circuit is used for the electric current for controlling LED string;
The power switch motion detection module sends trigger signal and starts to count to Timer module after power switch disconnection When, after power switch closure, reset signal is sent to Timer module by timer reset;
The Timer module carries out timing to power switch turn-off time, and sends control signal to constant-current drive circuit, uses In the setting of constant-current drive circuit;
It is characterized in that:Also include clock generating circuit, clock generating circuit converts AC supply voltage signal For synperiodic clock signal, and clock signal is delivered to Timer module, Timer module is counted according to clock signal When.
2. the control circuit according to claim 1 by detecting power switch action regulation light-source brightness, its feature exists In:The clock generating circuit includes electric capacity C7, resistance R7 and voltage-regulator diode D4, electric capacity C7 one end connection alternating current The plus earth of the negative pole of the live wire in source, other end connection R7 and voltage-regulator diode, resistance R7 and voltage-regulator diode.
3. the control circuit according to claim 1 by detecting power switch action regulation light-source brightness, its feature exists In:The clock generating circuit includes resistance R8, resistance R7 and voltage-regulator diode D4, resistance R8 one end connection alternating current The plus earth of the negative pole of the live wire in source, other end connection R7 and voltage-regulator diode, resistance R7 and voltage-regulator diode.
4. the control circuit according to claim 1 by detecting power switch action regulation light-source brightness, its feature exists In:Also include a diode D3, resistance R5, resistance R6 and electric capacity C5, diode D3 one end connection AC power Live wire, the other end connection resistance R5, R5 other end connection R6 and electric capacity C5, resistance R6 and electric capacity C5 ground connection, electric capacity C5 connections Power switch motion detection module.
5. the control circuit according to claim 1 by detecting power switch action regulation light-source brightness, its feature exists In:Output signal controlling switch S1~Sn of Timer module gating, change the input letter of the constant-current drive circuit Number VR magnitude of voltage;The constant-current drive circuit controls the electric current of LED string, different VR voltages according to signal VR magnitude of voltage The corresponding different LED string current value of value.
CN201720921339.4U 2017-07-26 2017-07-26 By the control circuit for detecting power switch action regulation light-source brightness Active CN206963154U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720921339.4U CN206963154U (en) 2017-07-26 2017-07-26 By the control circuit for detecting power switch action regulation light-source brightness

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720921339.4U CN206963154U (en) 2017-07-26 2017-07-26 By the control circuit for detecting power switch action regulation light-source brightness

Publications (1)

Publication Number Publication Date
CN206963154U true CN206963154U (en) 2018-02-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201720921339.4U Active CN206963154U (en) 2017-07-26 2017-07-26 By the control circuit for detecting power switch action regulation light-source brightness

Country Status (1)

Country Link
CN (1) CN206963154U (en)

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