CN107197570A - 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 PDFInfo
- Publication number
- CN107197570A CN107197570A CN201710617457.0A CN201710617457A CN107197570A CN 107197570 A CN107197570 A CN 107197570A CN 201710617457 A CN201710617457 A CN 201710617457A CN 107197570 A CN107197570 A CN 107197570A
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- power switch
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- drive circuit
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- 238000001514 detection method Methods 0.000 claims abstract description 16
- 238000002360 preparation method Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 230000010355 oscillation Effects 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 102100040858 Dual specificity protein kinase CLK4 Human genes 0.000 description 2
- 101000749298 Homo sapiens Dual specificity protein kinase CLK4 Proteins 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- Circuit Arrangement For Electric Light Sources In General (AREA)
- Led Devices (AREA)
Abstract
The invention discloses a kind of by detecting that power switch action adjusts the control circuit of 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；It is that LED string and constant-current drive circuit are powered that AC power is converted into direct current 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 the problem of light modulation electric current is inconsistent.
Description
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 completely specify after time △ TOFF, change lighting driving device output current and set, when power switch is turned on again, shine
Bright drive device output current changes into another arranges value.Specify 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, which are not counted, completely specifies 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 is turned on again to differ
Cause.
The content of the invention
The technical problem to be solved in the present invention is to solve above-mentioned the deficiencies in the prior art to shake using AC power there is provided one kind
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：One kind is by detecting that power switch is acted
The control circuit of light-source brightness is adjusted, including AC power, rectification circuit, LED string, constant-current drive circuit, power switch are moved
Make detection module and Timer module；The AC power supply module is that whole circuit system is powered；The mould preparation block will be exchanged
Power conversion is that direct current is that LED string and constant-current drive circuit are powered；The constant-current drive circuit is used to control LED string
Electric current；The power switch motion detection module sends trigger signal to Timer module and starts meter 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 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, the R5 other end connect R6 and electric capacity C5, and 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, changes VR magnitude of voltage；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 present invention has advantages below：When timer completely specifies time △ TOFF
Afterwards, change lighting driving device output current to set, when power switch is turned on again, lighting driving device output current changes
For another arranges value.Time △ TOFF is specified to be 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 adjusts the control circuit diagram of light-source brightness for the detection power switch action of prior art；
Fig. 2 adjusts the control circuit diagram of light-source brightness for the detection power switch action 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 constant-current drive circuit schematic diagram of the 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 that whole circuit system is powered, and alternating current uses 220V household electrics in the present embodiment.
It is that LED string and constant-current drive circuit are powered that AC power is converted into direct current by the mould preparation block, rectification circuit
For the rectifier bridge of four diode compositions.
Power switch motion detection module sends trigger signal to Timer module and starts meter 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 the time set according to system switches over to constant-current drive circuit, such as sets when system is fallen
Electricity continued 200ms, less than 5 seconds, then when power switch is closed again, changed the input reference voltage of constant-current drive circuit, right
LED current is switched over, 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 is 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
Voltage signal on the plus earth of R7 and voltage-regulator diode negative pole, resistance R7 and voltage-regulator diode, 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 used 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 is connected
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 completely specifies 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 is turned on again, lighting driving device output current changes into another arranges value.Specify 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, described diode D3 one end connects the live wire of 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, being a kind of constant-current drive circuit schematic diagram.Constant-current drive circuit is used for the electric current for controlling LED string,
Signal VR as constant-current drive circuit reference input voltage.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 connect 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 adjust 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 that whole circuit system is powered；
It is that LED string and constant-current drive circuit are powered that AC power is converted into direct current 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 to Timer module and starts meter 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. according to claim 1 by detecting that power switch action adjusts the control circuit of 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. according to claim 1 by detecting that power switch action adjusts the control circuit of 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. according to claim 1 by detecting that power switch action adjusts the control circuit of 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. according to claim 1 by detecting that power switch action adjusts the control circuit of light-source brightness, its feature exists
In：Output signal controlling switch S1~Sn of Timer module gating, changes 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 different LED string current value of value correspondence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710617457.0A CN107197570B (en) | 2017-07-26 | 2017-07-26 | Control circuit for adjusting light source brightness by detecting power switch action |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710617457.0A CN107197570B (en) | 2017-07-26 | 2017-07-26 | Control circuit for adjusting light source brightness by detecting power switch action |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107197570A true CN107197570A (en) | 2017-09-22 |
| CN107197570B CN107197570B (en) | 2023-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710617457.0A Active CN107197570B (en) | 2017-07-26 | 2017-07-26 | Control circuit for adjusting light source brightness by detecting power switch action |
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| CN (1) | CN107197570B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109890115A (en) * | 2019-04-19 | 2019-06-14 | 青岛亿联客信息技术有限公司 | A kind of intelligent lighting control system and its flash control circuit |
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2017
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Patent Citations (7)
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| CN103687217A (en) * | 2013-11-29 | 2014-03-26 | 上海亚明照明有限公司 | Switching and dimming LED driving circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109890115A (en) * | 2019-04-19 | 2019-06-14 | 青岛亿联客信息技术有限公司 | A kind of intelligent lighting control system and its flash control circuit |
| CN109890115B (en) * | 2019-04-19 | 2024-03-29 | 青岛易来智能科技股份有限公司 | Intelligent lamp control system and flashing control circuit thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107197570B (en) | 2023-10-24 |
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| CB03 | Change of inventor or designer information |
Inventor after: Xia Hu Inventor after: Liu Guizhi Inventor after: Huang Nianya Inventor after: Wang Dongfeng Inventor before: Xia Hu |
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