CN110113844A - A kind of control circuit and its monitoring camera, monitoring system of LED - Google Patents
A kind of control circuit and its monitoring camera, monitoring system of LED Download PDFInfo
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- CN110113844A CN110113844A CN201910466758.7A CN201910466758A CN110113844A CN 110113844 A CN110113844 A CN 110113844A CN 201910466758 A CN201910466758 A CN 201910466758A CN 110113844 A CN110113844 A CN 110113844A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 45
- 238000005286 illumination Methods 0.000 claims abstract description 35
- 230000001681 protective effect Effects 0.000 claims abstract description 26
- 230000001939 inductive effect Effects 0.000 claims description 21
- 230000006698 induction Effects 0.000 claims description 15
- 238000005070 sampling Methods 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 9
- 230000007123 defense Effects 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 abstract description 5
- 230000008859 change Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000001012 protector Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- 229910000679 solder Inorganic materials 0.000 description 1
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- 238000011105 stabilization Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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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]
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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
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The present invention is suitable for circuit field; provide the control circuit and its monitoring camera, monitoring system of a kind of LED; the control circuit includes: photosensitive module, integrated control module, LED light group and sluggish protective module; extraneous intensity of illumination is incuded by photosensitive module; and the light on and off of LED light group are controlled according to intensity of illumination by integrated control module; and sluggish protective module is equipped with for the case where preventing LED light group from flashing when extraneous intensity of illumination is unstable, extend service life of equipment.Discrete device is integrated in integrated control module by integral control circuit of the present invention, and simple in circuits is flexible, and peripheral components are at low cost; whole aircraft reliability is high; the lag function that circuit is realized by sluggish protective module, avoids LED light from flashing, and extends LED light service life.
Description
Technical field
The invention belongs to the control circuits and its monitoring camera of circuit field more particularly to a kind of LED, monitoring system.
Background technique
With the enhancing of antitheft consciousness, security monitoring camera using more and more, many security protection cameras all configure
There is LED illumination lamp, convenient for illuminating to monitoring range.
The LED illumination lamp of existing security monitoring camera all uses discrete device to realize, circuit needs multiple discrete
Component is interconnected to constitute, and component number is more, causes PCB surface product very big, there are many upper solder joint of PCB, so that the processing of PCB is not
Yield increases, and improves production cost；And normally due to discrete device is too many, the control circuit function of LED light generally all compares
Single, the effect of LED light control circuit is only merely the light on and off for controlling LED light, does not account for the safety and stabilization of LED light
Property, cause the service life of LED light shorter, improves monitoring cost.
It can be seen that circuit structure is complicated, production cost in the LED illumination lamp control of existing security monitoring camera
Height, circuit structure is single, is unable to estimate the safety and stability that LED light uses, causes the service lifes such as LED short, improves prison
Control cost.
Summary of the invention
The control circuit for being designed to provide a kind of LED of the embodiment of the present invention, it is intended to solve existing safety monitoring and take the photograph
As head LED illumination lamp control in, circuit structure is complicated, and high production cost, circuit structure is single, is unable to estimate LED light use
Safety and stability, cause the service lifes such as LED short, improve monitoring cost the technical issues of.
The embodiments of the present invention are implemented as follows, a kind of control circuit of LED, which is characterized in that the control electricity of the LED
Road includes:
Light intensity induction module, for incuding extraneous intensity of illumination, and according to the intensity of illumination output intensity inductive signal；
Integrated control module is connected to the light intensity induction module, for exporting LED control letter according to the light intensity inductive signal
Number；
LED light group includes at least a LED light, the integrated control module is connected to, in the LED control signal
Lower realize of control lights, extinguishes；And
Sluggish protective module is connected to the light intensity induction module, when the variation of the light intensity inductive signal is enough to make the LED
When the luminance that control signal controls the LED light group changes, the on state of the sluggishness protective module changes
Become, to delay the variation of the light intensity inductive signal.
The another object of the embodiment of the present invention is to provide a kind of security monitoring camera, comprising:
LED illumination lamp, the LED illumination lamp are controlled using the control circuit of LED described in above-described embodiment；And
Camera, the region for illuminating to the LED illumination lamp are monitored video recording.
The another object of the embodiment of the present invention is to provide a kind of safety defense monitoring system, comprising:
At least one security monitoring camera as described in above-described embodiment, for being monitored, recording a video；And
Storage medium, the monitoring video generated for receiving and storing the security monitoring camera.
In the control circuit and its monitoring camera of LED provided in an embodiment of the present invention, monitoring system, integral control circuit
Discrete device is integrated in integrated control module, simple in circuits is flexible, and peripheral components are at low cost, and whole aircraft reliability is high, passes through
Sluggish protective module realizes the lag function of circuit, and LED light is avoided to flash, and extends LED light service life, reduce monitoring at
This.
Detailed description of the invention
Fig. 1 is the control circuit functional block diagram of LED provided in an embodiment of the present invention；
Fig. 2 is the electric operation control circuit figure of LED provided in an embodiment of the present invention；
Fig. 3 is integrated control module circuit diagram provided in an embodiment of the present invention；
Fig. 4 is another electric operation control circuit figure provided in an embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
It is appreciated that term " first " used in this application, " second " etc. can be used to describe various elements herein,
But unless stated otherwise, these elements should not be limited by these terms.These terms are only used to by first element and another yuan
Part is distinguished.For example, in the case where not departing from scope of the present application, the first pin can be known as to the second pin, and class
As, the second pin can be known as the first pin.
Fig. 1 is the control circuit functional block diagram of LED provided in an embodiment of the present invention, and details are as follows.
In the control circuit of LED provided in an embodiment of the present invention, comprising:
Light intensity induction module 110, for incuding extraneous intensity of illumination, and according to the intensity of illumination output intensity inductive signal；
Integrated control module 120 is connected to the light intensity induction module 110, for exporting LED according to the light intensity inductive signal
Control signal；
LED light group 130 includes at least a LED light, is connected to the integrated control module 120, for controlling in the LED
It is realized under the control of signal and lights, extinguishes；And
Sluggish protective module 140 is connected to the light intensity induction module 110, when the variation of the light intensity inductive signal is enough to make
When the luminance that the LED control signal controls the LED light group changes, the on state of the sluggishness protective module
It changes, to delay the variation of the light intensity inductive signal.
In embodiments of the present invention, light intensity induction module 110 is the device that can be made a response to extraneous intensity of illumination, can
To be photosensitive sensor, such as photo resistance, phototriode, photoelectric tube light-sensitive device, can be become according to extraneous intensity of illumination
It changes and exports different light intensity inductive signals, wherein light intensity inductive signal can be voltage according to the difference of the light-sensitive device used
Signal, current signal etc., the present invention is with no restrictions.
In embodiments of the present invention, integrated control module 120 is the control core of entire control circuit, can be according to light intensity
The light intensity inductive signal that induction module 110 exports exports LED control signal, controls the luminance of LED light group, integrated control mould
Block is by being integrated in a piece of IC(Integrated Circuit, integrated circuit for multiple discrete devices) on chip, realize control
The control function of circuit.
In embodiments of the present invention, the LED control signal that LED light group 130 is issued in response to integrated control module 120, by
At least one LED light composition, can illuminate the monitoring range of security monitoring camera.
In embodiments of the present invention, sluggish protective module 140 has lag function, by changing itself on state,
It realizes the adjusting to light intensity inductive signal, prevents light intensity inductive signal from the case where too fast variation causes LED light to flash occur.
Discrete device is integrated in integrated control module by integral control circuit of the embodiment of the present invention, and simple in circuits is flexible,
Peripheral components are at low cost, and whole aircraft reliability is high, and the lag function of circuit is realized by sluggish protective module, LED light is avoided to occur
Flashing extends LED light service life, reduces monitoring cost.
In the control circuit of LED provided in an embodiment of the present invention, the light intensity induction module includes:
Photo resistance unit includes at least a photo resistance, and one end of the photo resistance unit is connected to power supply, the other end
It is connected to one end of divider resistance unit；And
The divider resistance unit, includes at least a fixed value resistance, and the other end of the divider resistance unit is grounded.
In embodiments of the present invention, as shown in Fig. 2, light intensity induction module has photo resistance and divider resistance to constitute, wherein
One end of photo resistance Cds is directly connected to power supply VIN, and the other end passes through resistance R14 connection resistance R15, resistance R14 and resistance
R15 constitutes divider resistance, resistance R15 ground connection；As a kind of preferred embodiment of the present invention, photo resistance Cds uses visible light
Photo-resistor, for incuding to visible light, right resistance R14 and resistance R15 are to use fixed value resistance can or use
Power transformation resistance, being can be using resistance value size all setting according to actual circuit of wire resistor or uncoiled resistance and resistance
Meter is selected, and the present invention is with no restrictions.
As one embodiment of the invention, photo resistance unit and divider resistance unit series connection access circuit, divider resistance
Photo resistance is divided, looking after intensity when the external world and change is that the resistance value of photo resistance changes, and leads to photosensitive electricity
The voltage at resistance both ends converts, then can be using the voltage at photo resistance both ends as light intensity inductive signal, when ambient light is according to strong
When degree changes, light intensity inductive signal can also change accordingly.
Light intensity induction module provided in an embodiment of the present invention, by the combination of photo resistance unit and divider resistance unit,
The voltage signal that the variation of extraneous intensity of illumination can be converted to photo resistance both ends, can accurately reflect extraneous intensity of illumination
Variation, convenient for opening LED light group in time in extraneous dimming.
In the control circuit of LED provided in an embodiment of the present invention, the integrated control module is integrated chip, including four
A pin, in which:
First pin is connected to the power supply, for powering for the integrated control module；
Second pin is connected to the common end of the photo resistance unit and the divider resistance unit, for obtaining described first
Signal voltage；
Third pin is connected to the LED light group, for exporting the LED control signal to the LED light group；And
4th pin is connected to the LED light group by sampling resistor, for sampling the electric current for flowing through the sampling resistor.
In embodiments of the present invention, as shown in Fig. 2, integrated control module 120 is there are four pin, the first pin VI, second
Pin PB, third pin OUT and the 4th pin VS, wherein the first pin VI is connected to power supply VIN, for being integrated control mould
Block power supply, the second pin PB is connected to one section of photo resistance far from power supply, as the reception light foot of light intensity inductive signal, by light
The voltage of the one end of quick resistance far from power supply is as in light intensity inductive signal input integrated control module, third pin OUT and the
Four pin VS are connected in LED light group 130, for exporting LED control signal and sampling LED luminous signal.
As an embodiment of the present invention, VIN connects supply voltage；PB connects the partial pressure of photo resistance Cds Yu resistance R14, R15
Whether signal is connected as switching signal control integrated control module 120；OUT meets R1 ~ R6, and OUT is integrated control module 120
Output end, output constant current electric current is by R1 ~ R6 to LED light string；VS connecting resistance R6 and LED light string junction, R6 is as electric current
Sampling resistor, the ohmically pressure drop feedback export current capacity to integrated control module internal control power tube.
In the control circuit of LED provided in an embodiment of the present invention, the integrated control module is constant current integrated control mould
Block, comprising:
First pin be connected to the emitter of the first triode, the collector of the second triode, third transistor current collection
The cathode of pole and first diode, the anode of the first diode are connected to the yin of second pin, the second diode
Pole and one end of first resistor, the other end of the first resistor are connected to the base stage of first triode, and described second
The anode of diode is connected to the 4th pin, and the emitter of first triode is connected to the collection of second triode
One end of electrode, the collector of the 4th triode and second resistance, the other end of the second resistance are connected to described second
The other end of one end of the emitter of triode, the base stage of the third transistor and 3rd resistor, the 3rd resistor connects
Connect the emitter of the third transistor, the third pin, one end of the 4th resistance and the third diode
The cathode of cathode, the third diode connects the 4th pin, and the other end of the 4th resistance is connected to the described 4th
The emitter of the base stage of triode, the 4th triode is connected to the 4th pin.
In embodiments of the present invention, as shown in figure 3, integrated circuit control module includes the first triode Q5, the two or three pole
Pipe Q6, third transistor Q7, the 4th triode Q8, first diode D3, the second diode D4 and third diode D5, first
Resistance R20, second resistance R21,3rd resistor R22, the 4th resistance R23, wherein VI pin be connected to triode Q5 emitter,
The anode of the cathode of the collector of triode Q6, the collector of triode Q7 and diode D3, the diode D3 is connected to
One end of the PB pin, the cathode of diode D4 and resistance R20, the other end of the resistance R20 are connected to three pole
The base stage of pipe Q5, the anode of the diode D4 are connected to the VS pin, and the emitter of the triode Q5 is connected to described
The other end of one end of the collector of triode Q6, the collector of triode Q7 and resistance R21, the resistance R21 is connected to
One end of the emitter of the triode Q6, the base stage of the triode Q7 and resistance R22, the other end of the resistance R22
The cathode of the emitter of the triode Q7, the OUT pin, one end of the resistance R23 and the diode D5 are connected,
The cathode of the diode D5 connects the VS pin, and the other end of the resistance R23 is connected to the base stage of the triode Q8,
The emitter of the triode Q8 is connected to the VS pin.As an embodiment of the present invention, VI pin connects DC power supply, when
When external environment luminous intensity is high, photo resistance Cds resistance value is small, and the voltage difference of VIN and PB is less than 0.7V, PNP pipe at PB pin
Q5 is in an off state, and NPN pipe Q6 ~ Q8 is also at off state, and no current exports at this time, and LED light string does not work, and works as external environment
When luminous intensity dies down, photo resistance Cds resistance value increases, and the voltage difference of VIN and PB is greater than 0.7V at PB pin, and PNP pipe Q5 is led
Logical, NPN pipe Q6 ~ Q7 conducting, electric current flows through R1 ~ R6 by Q7 pipe at this time, so that LED light string be lighted.
Multiple discrete devices by being integrated in one piece of IC chip by the embodiment of the present invention, and circuit structure is succinctly flexible, outside
Peripheral device is at low cost, and whole aircraft reliability is high, and the control of LED light light on and off can be realized according to the variation of extraneous intensity of illumination.
In LED control circuit provided in an embodiment of the present invention, the LED light group includes:
At least one LED lamp circuit, every LED lamp circuit are made of a LED light or are connected in series by multiple LED light, often
LED lamp circuit all passes through the first protective resistance and connect with the third pin, parallel with one another between every LED lamp circuit.
As one embodiment of the invention, as shown in Fig. 2, LED light group 130 includes 6 LED light strings, in every LED light string
6 LED light are in series with, one end of every LED light string is connected to the OUT pin of integrated control module by protective resistance, by collecting
At the light on and off of the LED control signal control LED light of control module output, wherein LED light can be used white led lamps, and power can be with
Scientific and technological actual circuit design is selected, and protective resistance can use fixed value resistance, can also use resistance-changing resistor, the present invention is not
Do lower restriction.As an embodiment of the present invention, it is approximately equal to when the voltage on resistance R6 is less than NPN pipe Q8 conducting voltage VBE(
When 0.7V), NPN pipe Q8 is in an off state, and NPN pipe Q6 ~ Q7 electric current will persistently increase at this time.When the voltage on resistance R6 reaches
When NPN pipe Q8 conducting voltage VBE or so, NPN pipe Q8 conducting, NPN pipe Q6 base current will be absorbed by the collector of Q8, thus
It reduces Q6, Q7 and exports electric current, which forms negative feedback loop, to realize constant current function.In embodiments of the present invention,
Constant current output electric current IO ≈ N*VBE/R19, N are lamp string number.
In embodiments of the present invention, integrated control module 120 internal power consumption PD ≈ (VIN-OUT) * IO, works as input voltage
When VIN is increased, 120 internal power consumption of integrated control module is increased；NPN pipe Q8 is due in IC interior, when the temperature increases
Q8 conducting voltage VBE is increased with temperature and is reduced, and reduction amplitude is about 2mV/ DEG C；Therefore when VIN is increased, output current IO ≈
N*VBE/R19 can decrease, and have overheat protector function, and current reduction is exported when circuit internal temperature increases, and reduce electricity
Road power consumption is to guarantee that circuit is not burnt.
As another embodiment of the invention, the protective resistance of LED light group does not include the resistance in upper one embodiment
R19, the embodiment of the present invention is identical as upper one embodiment function, only for continuous current IO value by being changed, in this hair
In bright embodiment, continuous current IO ≈ N*VBE/R6.
The embodiment of the present invention has constant current function by the way that LED light group is connected to integrated control module by protective resistance,
It is high can to export current precision by outer connecting resistance flexible modulation current value；Has overheat protector function, when circuit internal temperature liter
Current reduction is exported when high, reduces circuit power consumption to guarantee that circuit is not burnt.
In the control circuit of the LED of security monitoring camera provided in an embodiment of the present invention, the sluggishness protective module
Include:
Triode is protected, the collector of the protection triode is connected to the company of the photo resistance unit and divider resistance unit
Place, emitter ground connection are met, base stage is grounded by the second protective resistance.
As an embodiment of the present invention, as shown in Fig. 2, sluggish protective module 140 includes protection triode Q4, the first guarantor
Protect resistance R17 and the second protective resistance R18, wherein the collector of protection triode Q4 is connected to the photosensitive module, connects
One end to resistance R15 far from ground terminal, the emitter ground connection of protection triode Q4, base stage are connected to one end of resistance R17, electricity
The other end of resistance R17 is connected to one end of resistance R18, the other end ground connection of resistance R18.
In embodiments of the present invention, lag function can be realized by resistance R17, R18 and NPN pipe Q4.Work as external environment
When luminous intensity is by dying down by force, NPN pipe Q4 switchs on state by off state, and PB pin voltage is dragged down, to need photosensitive
The more hour that resistance Cds becomes could turn off integrated control module 120, to realize lag function, avoid light light and shade not
Timing causes LED light to flash.
The embodiment of the present invention delays PB pin voltage when ambient light and shade not timing by the way that sluggish protective module is arranged
Pace of change, avoid LED from flashing.
In the control circuit of LED provided in an embodiment of the present invention, further includes:
Feedback module draws from the LED light group, the integrated control module is connected to, for sampling the electricity of the LED light group
Information is pressed, and feeds back to the integrated control module, wherein the information of voltage is for described in integrated control module determination
The working condition of LED light group.
As one embodiment of the invention, as shown in Fig. 2, feedback module is made of a feedback resistance R16, feedback resistance
One end of R16 is connected to LED light group, and the other end exports sampled voltage IRC, wherein can directly integrate voltage IRC input value
Control module determines the working condition of the groups such as LED convenient for integrated control module.
The embodiment of the present invention obtains the sampled voltage IRC of LED light group, when external environment light intensity by setting feedback module
LED light string turns off when spending high, and IRC exports low level；When external environment luminous intensity is weak, LED light string is connected, the high electricity of IRC output
It is flat, convenient for determining the working condition of LED light group.
In the embodiment of the present invention, discrete device is integrated in integrated control module by integral control circuit, simple in circuits spirit
Living, peripheral components are at low cost, and whole aircraft reliability is high, and the lag function of circuit is realized by sluggish protective module, LED light is avoided to go out
It now flashes, extends LED light service life, reduce monitoring cost；Pass through the combination of photo resistance unit and divider resistance unit, energy
Enough voltage signals that the variation of extraneous intensity of illumination is converted to photo resistance both ends can accurately reflect extraneous intensity of illumination and become
Change, convenient for opening LED light group in time in extraneous dimming, have constant current function, outer connecting resistance flexible modulation electricity can be passed through
Flow valuve, output current precision are high；Have overheat protector function, current reduction is exported when circuit internal temperature increases, reduces electricity
Road power consumption is to guarantee that circuit is not burnt.
The embodiment of the present invention also provides a kind of security monitoring camera, comprising:
LED illumination lamp, the LED illumination lamp are controlled using the control circuit of LED described in any of the above-described embodiment；And
Camera, the region for illuminating to the LED illumination lamp are monitored video recording.
As one embodiment of the invention, LED illumination lamp is the LED light group in any of the above-described embodiment, using above-mentioned
The control circuit of LED in one embodiment controls, wherein camera can be using simulation camera or using digital camera
Head, the region that camera is used to illuminate LED illumination lamp are recorded a video.In embodiments of the present invention, when ambient intensity is high
When, LED light is extinguished under the control of the control circuit, and camera can also understand the picture for shooting monitoring area by available light
Face；When ambient deficiency, LED illumination lamp shines under the control of the control circuit, illuminates to monitoring area, camera
The picture for shooting monitoring area can be understood by the light of LED illumination lamp.
The embodiment of the present invention according to ambient light according to the luminance of intensity adjustment LED illumination lamp, when the external light is strong,
Extinguish LED light, camera shoots monitoring area by extraneous available light；When the religion of extraneous intensity of illumination is weak, control LED light hair
Light illuminates monitoring area, guarantees that camera shooting can take clearly monitored picture in the first day 24 hours.
The embodiment of the present invention also provides a kind of safety defense monitoring system, comprising:
At least one security monitoring camera as described in above-described embodiment, for being monitored, recording a video；And
Storage medium, the monitoring video generated for receiving and storing the security monitoring camera.
As one embodiment of the invention, safety defense monitoring system is for being monitored specified region, using camera pair
Monitoring area is monitored, and is transmitted to deposit in medium by monitored picture in real time and be stored, and staff is facilitated to check.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of control circuit of LED, which is characterized in that the control circuit of the LED includes:
Light intensity induction module, for incuding extraneous intensity of illumination, and according to the intensity of illumination output intensity inductive signal；
Integrated control module is connected to the light intensity induction module, for exporting LED control letter according to the light intensity inductive signal
Number；
LED light group includes at least a LED light, the integrated control module is connected to, in the LED control signal
Lower realize of control lights, extinguishes；And
Sluggish protective module is connected to the light intensity induction module, when the variation of the light intensity inductive signal is enough to make the LED
When the luminance that control signal controls the LED light group changes, the on state of the sluggishness protective module changes
Become, to delay the variation of the light intensity inductive signal.
2. control circuit according to claim 1, which is characterized in that the light intensity induction module includes:
Photo resistance unit includes at least a photo resistance, and one end of the photo resistance unit is connected to power supply, the other end
It is connected to one end of divider resistance unit；And
The divider resistance unit, includes at least a fixed value resistance, and the other end of the divider resistance unit is grounded.
3. control circuit according to claim 2, which is characterized in that the integrated control module is integrated chip, including
Four pins, in which:
First pin is connected to the power supply, for powering for the integrated control module；
Second pin is connected to the common end of the photo resistance unit and the divider resistance unit, for obtaining described first
Signal voltage；
Third pin is connected to the LED light group, for exporting the LED control signal to the LED light group；And
4th pin is connected to the LED light group by sampling resistor, for sampling the electric current for flowing through the sampling resistor.
4. control circuit according to claim 3, which is characterized in that the integrated control module is constant current integrated control mould
Block, comprising:
First pin be connected to the emitter of the first triode, the collector of the second triode, third transistor current collection
The cathode of pole and first diode, the anode of the first diode are connected to the yin of second pin, the second diode
Pole and one end of first resistor, the other end of the first resistor are connected to the base stage of first triode, and described second
The anode of diode is connected to the 4th pin, and the emitter of first triode is connected to the collection of second triode
One end of electrode, the collector of the 4th triode and second resistance, the other end of the second resistance are connected to described second
The other end of one end of the emitter of triode, the base stage of the third transistor and 3rd resistor, the 3rd resistor connects
Connect the emitter of the third transistor, the third pin, one end of the 4th resistance and the third diode
The cathode of cathode, the third diode connects the 4th pin, and the other end of the 4th resistance is connected to the described 4th
The emitter of the base stage of triode, the 4th triode is connected to the 4th pin.
5. control circuit according to claim 3, which is characterized in that the LED light group includes:
At least one LED lamp circuit, every LED lamp circuit are made of a LED light or are connected in series by multiple LED light, often
LED lamp circuit all passes through the first protective resistance and connect with the third pin, parallel with one another between every LED lamp circuit.
6. control circuit according to claim 5, which is characterized in that the LED lamp circuit is connected in series by 6 LED light,
The LED light group is formed in parallel by 6 LED lamp circuits.
7. control circuit according to claim 3, which is characterized in that it is described sluggishness protective module include:
Triode is protected, the collector of the protection triode is connected to the company of the photo resistance unit and divider resistance unit
Place, emitter ground connection are met, base stage is grounded by the second protective resistance.
8. control circuit according to claim 1, which is characterized in that further include:
Feedback module draws from the LED light group, the integrated control module is connected to, for sampling the electricity of the LED light group
Information is pressed, and feeds back to the integrated control module, wherein the information of voltage is for described in integrated control module determination
The working condition of LED light group.
9. a kind of security monitoring camera characterized by comprising
LED illumination lamp, the LED illumination lamp use the control circuit of LED described in any one of claim 1-8 claim
Control；And
Camera, the region for illuminating to the LED illumination lamp are monitored video recording.
10. a kind of safety defense monitoring system characterized by comprising
At least one security monitoring camera as claimed in claim 9, for being monitored, recording a video；And
Storage medium, the monitoring video generated for receiving and storing the security monitoring camera.
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| CN201910466758.7A CN110113844A (en) | 2019-05-31 | 2019-05-31 | A kind of control circuit and its monitoring camera, monitoring system of LED |
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| CN201910466758.7A CN110113844A (en) | 2019-05-31 | 2019-05-31 | A kind of control circuit and its monitoring camera, monitoring system of LED |
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