CN104582208B - Illuminating circuit and illuminating circuit control method - Google Patents
Illuminating circuit and illuminating circuit control method Download PDFInfo
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- CN104582208B CN104582208B CN201510082302.2A CN201510082302A CN104582208B CN 104582208 B CN104582208 B CN 104582208B CN 201510082302 A CN201510082302 A CN 201510082302A CN 104582208 B CN104582208 B CN 104582208B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000003990 capacitor Substances 0.000 claims description 22
- 238000005070 sampling Methods 0.000 claims description 8
- 238000005286 illumination Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 230000036961 partial effect Effects 0.000 claims description 6
- 230000001960 triggered effect Effects 0.000 claims 1
- 230000003068 static effect Effects 0.000 abstract description 2
- 230000011664 signaling Effects 0.000 abstract 1
- 230000005669 field effect Effects 0.000 description 21
- 101100190527 Arabidopsis thaliana PIN5 gene Proteins 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 101150011456 PIN8 gene Proteins 0.000 description 5
- 230000009471 action Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 101100190530 Arabidopsis thaliana PIN8 gene Proteins 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 101100190528 Arabidopsis thaliana PIN6 gene Proteins 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- 230000000638 stimulation Effects 0.000 description 2
- 101100190529 Arabidopsis thaliana PIN7 gene Proteins 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
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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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Abstract
The invention discloses an illuminating circuit and an illuminating circuit control method. The illuminating circuit comprises a power supply circuit, an illuminating lamp, a current acquiring circuit, a micro processor and an output control circuit, wherein the current acquiring circuit is used for acquiring the value of current passing through the illuminating lamp in real time; the micro processor is used for receiving the value of the current which is acquired by the current acquiring circuit in real time and passes through the illuminating lamp, and adjusting a modulating signal input to an output control circuit so as to control the value of the current passing through the illuminating lamp to be the preset current value; the output control circuit is used for converting the modulating signal into a direct-current signal, and controlling the starting of the illuminating lamp. According to the illuminating circuit provided by the invention, the current value of the illuminating lamp is acquired in real time and fed back so as to control the constant current of the illuminating lamp; the current control is more accurate than that of a linear constant-current-source circuit; moreover, under the condition that the illuminating lamp is turned off, the whole circuit is at the non-electrified state, and the static power consumption is nearly zero.
Description
Technical field
The present invention relates to lighting field, more particularly to a kind of lighting circuit and lighting circuit control method.
Background technology
LED illumination has been widely used in daily life, has low energy consumption, service life using LED illumination
The advantages such as long and environmental protection.
Existing car steering room lighting lamp also gradually by adopting common bulb, to being turned using light emitting diode (LED) lamp
Become.Its control circuit typically carries out current constant control, but Linear CCS current control deviation and drift using linear constant current source chip
Move larger, accuracy is not high.
In addition, the illumination in existing car steering room also needs to power linear constant current source chip all the time, quiescent dissipation compared with
Greatly.
The content of the invention
It is an object of the invention to provide a kind of lighting circuit and lighting circuit control method, it is therefore intended that solve linear permanent
Stream source chip current constant control accuracy is not high, the problem that quiescent dissipation is larger.
For solving above-mentioned technical problem, the present invention provides a kind of lighting circuit, including power supply and illuminating lamp, the photograph
Bright circuit includes：
Current collection circuit, microprocessor and output control circuit；
The input of the current collection circuit is connected with the outfan of the output control circuit, the current acquisition
The outfan of circuit is connected with the collection signal input part of the microprocessor, the input of the output control circuit and institute
State illuminating lamp to be connected, the control end of the output control circuit is connected with the pulse-modulated signal end of the microprocessor,
The power input of the microprocessor is connected with the power supply；
The current collection circuit is used for current value of the Real-time Collection by the illuminating lamp, and the microprocessor is used for connecing
The current value by the illuminating lamp that the current collection circuit Real-time Collection is obtained is received, adjustment input is to the output control
The modulated signal of circuit, to control by the current value of the illuminating lamp as pre-set current value；The output control circuit is used for
The modulated signal is converted into into direct current signal, the unlatching of the illuminating lamp is controlled.
Alternatively, the current collection circuit includes：
Current sampling resistor and filter circuit, the current sampling resistor include first resistor, the filter circuit bag
Second resistance and the second capacitor is included, the second resistance is in parallel with second capacitor, the one of second capacitor
End is connected with one end of the second resistance and the collection signal input part of the microprocessor respectively, second capacitor
The other end is grounded, and the other end of the second resistance is defeated with one end of the first resistor and the output control circuit respectively
Go out end to be connected, the other end ground connection of the first resistor.
Alternatively, the output control circuit includes：
7th resistance, the first transistor, 3rd resistor and the first capacitor, the control end of the first transistor pass through
7th resistance is connected with the pulse-modulated signal end of the microprocessor, the outfan of the first transistor with it is described
First resistor is connected, and the input of the first transistor is connected with the illuminating lamp by the 3rd resistor, and described first
Capacitor is connected in parallel on the two ends of the illuminating lamp.
Alternatively, also include：
First switch, the 5th resistance and stabilivolt；
5th resistance and stabilivolt composition mu balanced circuit, the voltage for microprocessor described in control input exist
In the range of normal power supply；One end of 5th resistance is connected with the power supply by the first switch, and described
The other end of five resistance is connected with the power input of the negative pole and the microprocessor of the stabilivolt respectively, described steady
The plus earth of pressure pipe.
Alternatively, also include：
Latching circuit, the latching circuit include third transistor, the 6th resistance and transistor seconds；
The outfan of the third transistor is connected with the control end of the transistor seconds by the 6th resistance,
The input end grounding of the third transistor, the power output end phase of the control end of the third transistor and the microprocessor
Connection, the transistor seconds input is connected with the power supply, and the outfan of the transistor seconds passes through described the
Five resistance are connected with the power input of the microprocessor.
Alternatively, also include：
Bleeder circuit, is connected with the first switch and the microprocessor, in parallel with the mu balanced circuit point
Pressure；
The bleeder circuit includes：8th resistance and the 12nd resistance, one end of the 8th resistance is by described the
One switch be connected with the power supply, the other end is connected with one end of the 12nd resistance, the 12nd resistance it is another
One end is grounded, the voltage division signal input phase of common port of the 8th resistance with the 12nd resistance and the microprocessor
Even.
Alternatively, also include：
Second diode, the positive pole of second diode are connected with the first switch, negative pole and the mu balanced circuit
In the 5th resistance be connected, for when the first switch close, latching circuit described in control electric current Jing and mu balanced circuit pair
The microprocessor power supply.
Present invention also offers a kind of lighting circuit control method, including：
Current value of the Real-time Collection by illuminating lamp；
The modulated signal of the input illuminating lamp is adjusted according to the current value, the current value is controlled as predetermined current
Value；
The modulated signal is converted into into direct current signal, the unlatching of the illuminating lamp is controlled.
Alternatively, also include：
When detecting first switch and pressing for the second time, bleeder circuit carries out partial pressure in parallel with mu balanced circuit, to control to lead to
The current value for crossing the illuminating lamp reduces；
When detecting first switch third time and pressing, microprocessor stops output modulated signal, described to control
Illuminating lamp is closed；
Wherein, when the first switch is pressed for the first time, triggering microprocessor output modulated signal, to control the illumination
Lamp is opened, and the microprocessor is powered by latching circuit.
Alternatively, when the first switch is pressed for the first time, trigger the microprocessor and export modulated signal, to control
Stating illuminating lamp and opening includes：
When the first switch is pressed for the first time, the microprocessor exports the modulated signal of low duty ratio, to control
State illuminating lamp unlatching.
Lighting circuit provided by the present invention, using current collection circuit to having been carried out in real time by the current value of illuminating lamp
Collection, the current value that microprocessor is obtained according to above-mentioned Real-time Collection, adjustment are input to the modulated signal of output control circuit, with
The current value for controlling the illuminating lamp is pre-set current value.It can be seen that, the lighting circuit that the present invention is provided is by the illuminating lamp
Current value gathered in real time and fed back, the current constant control to the illuminating lamp can be realized, than linear constant current source circuit
Current control is more accurate.
Further, in the case of illuminating lamp closing, whole circuit is in not lighting circuit provided by the present invention
The state of energization, quiescent dissipation are almost nil.In addition, a kind of present invention also offers lighting circuit control method.
Description of the drawings
Fig. 1 is a kind of structured flowchart of specific embodiment of lighting circuit provided by the present invention；
Fig. 2 is the circuit diagram of another kind of specific embodiment of lighting circuit provided by the present invention；
Fig. 3 is a kind of flow chart of specific embodiment of lighting circuit control method provided by the present invention.
Specific embodiment
In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.Obviously, described embodiment is only a part of embodiment of the invention, rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belongs to the scope of protection of the invention.
A kind of structured flowchart of specific embodiment of lighting circuit provided by the present invention is as shown in figure 1, the power for illumination
Road includes：
Power supply 100, current collection circuit 101, microprocessor 102, output control circuit 103 and illuminating lamp
104、；
The input of the current collection circuit 101 is connected with the outfan of the output control circuit 103, the electricity
The outfan of stream Acquisition Circuit 101 is connected with the collection signal input part of the microprocessor 102, the output control circuit
103 input is connected with the illuminating lamp 104, the control end of the output control circuit 103 and the microprocessor 102
Pulse-modulated signal end be connected, the power input of the microprocessor 102 is connected with the power supply 100；
Wherein, current collection circuit 101 is used for current value of the Real-time Collection by the illuminating lamp, and microprocessor 102 is used
In the current value by the illuminating lamp that the current collection circuit Real-time Collection is obtained is received, adjustment input is to output control
The modulated signal of circuit, to control by the current value of the illuminating lamp as pre-set current value；Output control circuit 103 is used for will
The modulated signal is converted into direct current signal, controls the unlatching of the illuminating lamp.
Lighting circuit provided by the present invention, using current collection circuit, 101 pairs are carried out by the current value of illuminating lamp
Real-time Collection, the current value that microprocessor 102 is obtained according to above-mentioned Real-time Collection, adjustment are input to the modulation of output control circuit
Signal, to control the current value of the illuminating lamp as pre-set current value.It can be seen that, the lighting circuit that the present invention is provided is by described
The current value of illuminating lamp is gathered in real time and is fed back, and can realize the current constant control to the illuminating lamp, compares linear constant current
Source circuit current control is more accurate.
In the lighting circuit provided by the present embodiment, current collection circuit 101 can be specifically included：
Current sampling resistor and filter circuit, the current sampling resistor include first resistor R1, the filter circuit
Including second resistance R2 and the second capacitor C2, second resistance R2 is in parallel with the second capacitor C2, and described second
One end of capacitor C2 is connected with one end of second resistance R2 and the collection signal input part of the microprocessor respectively, institute
State the other end ground connection of the second capacitor C2, the other end of second resistance R2 respectively with one end of first resistor R1 and
The outfan of the output control circuit is connected, the other end ground connection of first resistor R1.
Output control circuit can be specifically included：
7th resistance R7, the first transistor Q1,3rd resistor R3 and the first capacitor C1, the first transistor Q1's
Control end is connected with the pulse-modulated signal end of the microprocessor by the 7th resistance R7, the first transistor Q1
Outfan be connected with first resistor R1, the input of the first transistor Q1 by 3rd resistor R3 with it is described
Illuminating lamp is connected, and the first capacitor C1 is connected in parallel on the two ends of the illuminating lamp.
The lighting circuit provided by the embodiment of the present invention may further include：First switch S1, the 4th resistance R4, the 5th
Resistance R5 and stabilivolt D3.
Wherein, first switch S1 is connected with the power supply 100, and the power supply for controlling whole circuit is powered；
The 5th resistance R5 and stabilivolt D3 composition mu balanced circuits, the voltage for control input microprocessor exist
In the range of normal power supply；One end of the 5th resistance R5 is connected with the power supply by first switch S1, institute
The other end for stating the 5th resistance R5 is connected with the power input of the negative pole and the microprocessor of the stabilivolt D3 respectively
Connect, the plus earth of the stabilivolt D3.
As a kind of preferred implementation, the 4th resistance, the 4th resistance R4 and institute in the present embodiment, can also be included
First switch S1 collective effect is stated, for preventing circuit erroneous action.
The lighting circuit provided by the embodiment of the present invention can further include：Latching circuit, the latching circuit bag
Include third transistor Q3, the 6th resistance R6 and transistor seconds Q2；
Control end of the outfan of third transistor Q3 by the 6th resistance R6 and transistor seconds Q2
It is connected, the input end grounding of third transistor Q3, the control end of third transistor Q3 and the microprocessor
Power output end is connected, and the transistor seconds Q2 inputs are connected with the power supply 100, the transistor seconds Q2
Outfan be connected with the power input of the microprocessor 102 by the 5th resistance R5.
The lighting circuit provided by the embodiment of the present invention can further include：Bleeder circuit, with the first switch
S1 and the microprocessor 102 are connected, for partial pressure in parallel with the mu balanced circuit；
The bleeder circuit includes：8th resistance R8 and the 12nd resistance R12, one end of the 8th resistance R8 pass through
First switch S1 is connected with the power supply 100, and the other end is connected with one end of the 12nd resistance R12, described
The other end ground connection of the 12nd resistance R12, the common port of the 8th resistance R8 and the 12nd resistance R12 and micro- place
The voltage division signal input of reason device 102 is connected.
The lighting circuit provided by the embodiment of the present invention can further include：Second diode D2, the described 2nd 2
The positive pole of pole pipe D2 is connected with first switch S1, and negative pole is connected with the 5th resistance R5 in the mu balanced circuit, for
When first switch S1 is closed, latching circuit described in control electric current Jing is powered to the microprocessor 102 with mu balanced circuit.
Fig. 2 show the circuit diagram corresponding to another kind specific embodiment of the invention, in this specific embodiment, first
Transistor Q1, transistor seconds Q2 and third transistor Q3 can specifically adopt field effect transistor, microprocessor 102 be specially
Microprocessor U1, illuminating lamp 104 can be specially LED1.
Wherein, the first transistor Q1 can be specially NMOS field effect transistor.The grid of the first field effect transistor Q1 is electric by the 7th
Resistance R7 is connected with the pulse-modulated signal end of the microprocessor, and source electrode is connected with first resistor R1, and drain electrode is electric by the 3rd
Resistance R3 is connected with illuminating lamp 104.
Transistor seconds Q2 can be specially PMOS field effect transistor, and the 3rd field effect transistor Q3 can be specially NMOS tube.3rd
The drain electrode of effect pipe Q3 is connected with the grid of the transistor seconds Q2 by the 6th resistance R6, source ground, grid with it is micro-
Processor 102 is connected, and the source electrode of the second field effect transistor Q2 is connected with power supply 100, and drain electrode is by the 5th resistance R5 and Wei Chu
The power input of reason device 102 is connected.Further, in the present embodiment, lighting circuit provided by the present invention also includes：
First diode D1, is connected with power supply 100, for ending in reverse power connection, protects the lighting circuit；
Tenth resistance R10, the 11st resistance R11, the 4th resistance R4, for filtering interfering, prevent circuit erroneous action.Its
In, the tenth resistance R10 and the 11st resistance R11 is pull down resistor, and one end of the tenth resistance R10 is grounded, the other end and the 3rd
The grid of effect pipe Q3 is connected, and one end ground connection of the 11st resistance R11, the other end are connected with microprocessor 102, the 4th resistance R4
For pull-up resistor, one end is connected with the negative pole of the first diode D1, and the other end is connected with the grid of the second field effect transistor Q2；
The two ends of the 3rd capacitor C3, the 3rd capacitor C3 are connected in parallel on the two ends of stabilivolt D3, for being stably input into micro- place
The voltage of reason device 102.
In an initial condition, the gate pole of the 3rd field effect transistor Q3 is low level, and the gate pole of the second field effect transistor Q2 is high electricity
Flat, the gate pole of the first field effect transistor Q1 is low level, the first field effect transistor Q1, the second field effect transistor Q2 and the 3rd field effect transistor
Q3 is closed, and first switch S1 is also at off-state, therefore whole circuit is closed, microprocessor 102
Power-off, illuminating lamp 104 are also at closed mode, and circuit static power consumption is zero.
When first switch S1 is closed, power supply 100 passes through the second diode D2, the 5th resistance R5 and stabilivolt D3
The power circuit of composition, powers to microprocessor 102, on microprocessor 102 after electricity, its I/O port PIN5 is set to high level, is made
The gate pole of the 3rd field effect transistor Q3 is changed into high level, and the 3rd field effect transistor Q3 is opened.Now by the 6th resistance R6, second is made
The gate pole of effect pipe Q2 is changed into low level, and the second field effect transistor Q2 is opened.Microprocessor 102 by the second field effect transistor Q2, the
Five resistance R5, stabilivolt D3 are powered, and circuit enters self-locking state.5th resistance R5, stabilivolt D3 constitute mu balanced circuit, make
Output voltage stabilization is in the supply district of microprocessor 102.First switch S1 is disconnected now, microprocessor 102 passes through self-locking
Power supply.
After microprocessor 102 is powered by self-locking, by I/O port PIN8 output pulse width modulated signals (PWM waveform), pass through
7th resistance R7 opens the first field effect transistor Q1, while gathering first resistor by the AD mouths PIN7 of the microprocessor 102
Voltage Ur1 on R1, calculates the current value (Ur1/R1) by first resistor R1 by the voltage in first resistor R1, so
The dutycycle of pulse-width signal, the current value needed for reaching, i.e. electric current on illuminating lamp 104 is adjusted afterwards.First resistor R1 is
The voltage of PWM ripples is become direct current by current sampling resistor, the filter circuit consisted of second resistance R2, the second capacitor C2
Voltage, gathers for AD.3rd resistor R3, the first capacitor C1 composition filter circuits, make to become by the PWM ripples on illuminating lamp 104
Into DC voltage.The two ends of the first capacitor C1 are connected in parallel on the two ends of illuminating lamp 104 simultaneously, constitute filtered electrical with 3rd resistor R3
Road, it is possible to filter the interference high-voltage pulse or electrostatic on power supply 100, protects illuminating lamp.
When upper electric, pulse-width signal can be exported using low duty ratio, prevent supply voltage too high, cause the excessive burning of electric current
Illuminating lamp is ruined, then dutycycle can gradually be adjusted by the current value for collecting, be reached normalized current.This process can be realized out
During lamp, illuminating lamp reduces the stimulation to eyes by secretly to bright progressive formation.
After illumination lamp ignition, first switch is disconnected, circuit power realizes self-locking.Now due to the second diode D2 every
From effect, the voltage at the 8th resistance R8 two ends is zero.First switch is pressed again now, power supply 100 passes through the 8th resistance R8
It is input to the I/O port PIN6 of microprocessor 102.The bleeder circuit of the 8th resistance R8 and the 12nd resistance R12 compositions is by supply voltage
Drop in the input range of microprocessor 102, and the 12nd resistance R12 can filter the interference on I/O port as pull down resistor,
Prevent circuit erroneous action.
After microprocessor 102 receives the instruction that first switch is pressed for the second time, the pulsewidth modulation letter that PIN8 is exported
Number dutycycle reduce, and by current control circuit control diminish by the electric current of illuminating lamp 104, make illuminating lamp dimmed, reality
Now the brightness to the illuminating lamp switches.When judging that third time presses first switch, after microprocessor 102 receives signal, will
The output of PIN8 is closed, and illuminating lamp is closed.Then PIN5 outputs low level, closes the 3rd field effect transistor Q3, now second effect
Should pipe Q2 be accordingly turned off, 102 power-off of microprocessor releases self-locking, and whole circuit enters closed mode.
In a specific embodiment, first switch S1 can work as microprocessor in the form of intelligent switch touch key-press
102 detect first switch S1 when pressing for the first time, set the value of attribute mark S of first switch S1 as 1, work as microprocessor
102 detect first switch presses and when the value of its attribute mark S is 1, judges button for pressing for the second time, and by its attribute mark
Will S is set as 2.Afterwards microprocessor 102 detect the button, if button is pressed, and the value of the attribute mark S be 2 when,
Judge button and press for third time.
Embodiment of the present invention using microprocessor to being gathered in real time and being fed back by the current value of illuminating lamp, energy
Current constant control to illuminating lamp is realized enough, it is more accurate to control than Linear CCS circuital current.In addition, by arranging partial pressure electricity
Road can realize that the light and shade to illuminating lamp switches, and realize various light modulations.
In above-mentioned each embodiment, power supply V1 of the concrete optional magnitude of voltage of power supply 100 for 12V, illuminating lamp 104
Optional white led lamps, the features such as LED has life-span length, low in energy consumption and efficiency high.
First switch S1 can be switched using ship type or button switch.Preferably, first switch S1 can also be using touch
, used as switch, compared with traditional switch, the handling and sense of touch of the touch key-press is good for button.
Embodiment of the present invention employs a touch key-press, by isolation and the unlatching for from lock technology, realizing power supply and
Keypress function.The microprocessor is gathered in real time and is fed back by the current value of the illuminating lamp, can be realized to institute
The current constant control of illuminating lamp is stated, it is more accurate to control than Linear CCS circuital current.The microprocessor can also be by changing
Time-dependent current, realizes that the slow unlatching to the illuminating lamp and light and shade switch, realizes various light modulations.
Also, as a result of switching technique, the efficiency of whole circuit is high compared with the circuit efficiency using constant current source chip very
Many, because constant current source chip reaches constant current purpose using itself pressure drop is adjusted during constant current, its own consumes most of
Power consumption.Powered using 12V, LED rated current 100mA, LED now pressure drop 3V, then total power consumption is 1.2W, and LED power consumptions are 0.3W,
Constant-current source chip power-consumption is 0.9W, and delivery efficiency is 25%.Powered using 12V in embodiment of the present invention, LED power consumptions are
0.3W, when sampling resistor is 1 Europe, power consumption is 0.01W, and metal-oxide-semiconductor loss evaluation is about 0.03W, then delivery efficiency is 88.2%.By
Larger in constant-current source chip power-consumption, so needing large-area fin, the power consumption of embodiment of the present invention is extremely low, can adopt
The area of dissipation of very little.Due to low in energy consumption, whole circuit operating temperature is low, and device lifetime greatly increases, reliability, stability
By force.
As shown in figure 3, present invention also offers a kind of lighting circuit control method, a kind of specific embodiment of the method
Specifically include：
Step S100：Current value of the Real-time Collection by illuminating lamp；
Step S101：The modulated signal of the input illuminating lamp is adjusted according to the current value, to control the current value
For pre-set current value；
Step S102：The modulated signal is converted into into direct current signal, the unlatching of the illuminating lamp is controlled.
In the present embodiment, the method can be specifically included：
When first switch is pressed for the first time, triggering microprocessor output modulated signal is opened with controlling the illuminating lamp,
The microprocessor is powered by latching circuit；
When detecting first switch and pressing for the second time, bleeder circuit carries out partial pressure in parallel with mu balanced circuit, to control to lead to
The current value for crossing the illuminating lamp reduces；
When detecting first switch third time and pressing, microprocessor stops output modulated signal, described to control
Illuminating lamp is closed.
Specifically, when first switch is pressed for the first time, illuminating lamp 104 is lighted, and disconnects button, and the lighting circuit is realized certainly
Lock.Now due to the buffer action of the second diode D2, the voltage at the 8th resistance R8 two ends is zero.When judging to press for the second time
During one switch, power supply 100 is input to the I/O port PIN6 of microprocessor 102 by the 8th resistance R8.8th resistance R8 and
The bleeder circuit of 12 resistance R12 compositions drops to supply voltage in the input range of microprocessor 102, and the 12nd resistance
R12 can filter the interference on I/O port, prevent circuit erroneous action as pull down resistor.Now, the pulsewidth modulation for PIN8 being exported
The dutycycle of signal reduces, and is diminished by the electric current of illuminating lamp 104 by current control circuit control, makes illuminating lamp dimmed,
Realize that the brightness to the illuminating lamp switches.When detecting first switch third time and pressing, microprocessor 102 receives letter
After number, the output of PIN8 is closed, illuminating lamp is closed.Then PIN5 outputs low level, closes the 3rd field effect transistor Q3, and now the
Two field effect transistor Q2 are accordingly turned off, 102 power-off of microprocessor, release self-locking, and whole circuit enters closed mode.
Used as a kind of preferred implementation, when first switch is pressed for the first time, the microprocessor exports low duty ratio
Modulated signal, opened with controlling the illuminating lamp.By first exporting with low duty ratio when upper electric, supply voltage is prevented from
It is too high, cause electric current excessive, burn illuminating lamp.Then gradually normalized current is finally reached to big adjustment dutycycle.The process
The brightening process of illuminating lamp is realized, user is made when turning on light have from secretly and, to bright adaptation process, reduce the stimulation to eyes.
The other parts of the lighting circuit control method provided in the present embodiment and identical or phase in above-mentioned lighting circuit
Seemingly, will not be described here.
In this specification, each embodiment is described by the way of progressive, and what each embodiment was stressed is and other
The difference of embodiment, between each embodiment same or similar part mutually referring to.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope for causing.
Claims (9)
1. a kind of lighting circuit, including power supply and illuminating lamp, it is characterised in that the lighting circuit includes：
Current collection circuit, microprocessor and output control circuit；
The input of the current collection circuit is connected with the outfan of the output control circuit, the current collection circuit
Outfan be connected with the collection signal input part of the microprocessor, the input of the output control circuit and the photograph
Bright lamp is connected, and the control end of the output control circuit is connected with the pulse-modulated signal end of the microprocessor, described
The power input of microprocessor is connected with the power supply；
The current collection circuit is used for current value of the Real-time Collection by the illuminating lamp, and the microprocessor is used for receiving institute
The current value by the illuminating lamp that current collection circuit Real-time Collection is obtained is stated, adjustment input is to the output control circuit
Modulated signal, to control by the current value of the illuminating lamp as pre-set current value；The output control circuit is for by institute
State modulated signal and be converted into direct current signal, control the unlatching of the illuminating lamp；
Wherein, also include：
First switch, the 5th resistance and stabilivolt；
5th resistance and the stabilivolt composition mu balanced circuit, for microprocessor described in control input voltage normal
In supply district；One end of 5th resistance is connected with the power supply by the first switch, and the described 5th is electric
The other end of resistance is connected with the power input of the negative pole and the microprocessor of the stabilivolt respectively, the stabilivolt
Plus earth.
2. lighting circuit as claimed in claim 1, it is characterised in that the current collection circuit includes：
Current sampling resistor and filter circuit, the current sampling resistor include first resistor, and the filter circuit includes
Two resistance and the second capacitor, the second resistance are in parallel with second capacitor, one end point of second capacitor
Be not connected with one end of the second resistance and the collection signal input part of the microprocessor, second capacitor it is another
End ground connection, the other end of second resistance one end and the outfan of the output control circuit respectively with the first resistor
It is connected, the other end ground connection of the first resistor.
3. lighting circuit as claimed in claim 2, it is characterised in that the output control circuit includes：
7th resistance, the first transistor, 3rd resistor and the first capacitor, the control end of the first transistor is by described
7th resistance is connected with the pulse-modulated signal end of the microprocessor, the outfan of the first transistor and described first
Resistance is connected, and the input of the first transistor is connected with the illuminating lamp by the 3rd resistor, first electric capacity
Device is connected in parallel on the two ends of the illuminating lamp.
4. lighting circuit as claimed in claim 1, it is characterised in that also include：
Latching circuit, the latching circuit include third transistor, the 6th resistance and transistor seconds；
The outfan of the third transistor is connected with the control end of the transistor seconds by the 6th resistance, described
The input end grounding of third transistor, the control end of the third transistor are connected with the power output end of the microprocessor
Connect, the transistor seconds input is connected with the power supply, the outfan of the transistor seconds passes through the described 5th
Resistance is connected with the power input of the microprocessor.
5. lighting circuit as claimed in claim 4, it is characterised in that also include：
Bleeder circuit, is connected with the first switch and the microprocessor, for partial pressure in parallel with the mu balanced circuit；
The bleeder circuit includes：8th resistance and the 12nd resistance, one end of the 8th resistance are opened by described first
Pass is connected with the power supply, and the other end is connected with one end of the 12nd resistance, the other end of the 12nd resistance
Ground connection, the 8th resistance are connected with the voltage division signal input of the microprocessor with the common port of the 12nd resistance.
6. lighting circuit as claimed in claim 5, it is characterised in that also include：
Second diode, the positive pole of second diode are connected with the first switch, in negative pole and the mu balanced circuit
5th resistance is connected, for when the first switch is closed, latching circuit described in control electric current Jing is with mu balanced circuit to described
Microprocessor power supply.
7. a kind of lighting circuit control method, is applied in the lighting circuit as described in any one of claim 1-6, and its feature exists
In, including：
Current value of the Real-time Collection by illuminating lamp；
The modulated signal of the input illuminating lamp is adjusted according to the current value, the current value is controlled as pre-set current value；
The modulated signal is converted into into direct current signal, the unlatching of the illuminating lamp is controlled.
8. lighting circuit control method as claimed in claim 7, it is characterised in that also include：
When detecting first switch and pressing for the second time, bleeder circuit carries out partial pressure in parallel with mu balanced circuit, to control by institute
The current value for stating illuminating lamp reduces；
When detecting first switch third time and pressing, microprocessor stops output modulated signal, to control the illumination
Lamp is closed；
Wherein, when the first switch is pressed for the first time, triggering microprocessor output modulated signal is opened with controlling the illuminating lamp
Open, the microprocessor is powered by latching circuit.
9. lighting circuit control method as claimed in claim 8, it is characterised in that when the first switch is pressed for the first time,
The microprocessor output modulated signal is triggered, is included with controlling the illuminating lamp unlatching：
When the first switch is pressed for the first time, the microprocessor exports the modulated signal of low duty ratio, to control the photograph
Bright lamp is opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510082302.2A CN104582208B (en) | 2015-02-15 | 2015-02-15 | Illuminating circuit and illuminating circuit control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510082302.2A CN104582208B (en) | 2015-02-15 | 2015-02-15 | Illuminating circuit and illuminating circuit control method |
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| Publication Number | Publication Date |
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| CN104582208A CN104582208A (en) | 2015-04-29 |
| CN104582208B true CN104582208B (en) | 2017-03-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109121251A (en) * | 2018-09-21 | 2019-01-01 | 港基创意模型设计（深圳）有限公司 | Buildings model lamp light control system |
| CN209105317U (en) * | 2019-01-14 | 2019-07-12 | 深圳Tcl新技术有限公司 | Backlight lamp bar, display screen and television set |
Citations (3)
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|---|---|---|---|---|
| EP0142063A1 (en) * | 1983-10-19 | 1985-05-22 | Hitachi Lighting, Ltd. | Lighting apparatus for an electric discharge lamp |
| CN102469655A (en) * | 2010-11-11 | 2012-05-23 | 海洋王照明科技股份有限公司 | Light-emitting diode (LED) driving circuit |
| CN102711309A (en) * | 2011-03-28 | 2012-10-03 | 海洋王照明科技股份有限公司 | LED (Light Emitting Diode) driving circuit and lamp |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5302755B2 (en) * | 2009-04-24 | 2013-10-02 | パナソニック株式会社 | Power supply |
| CN201571033U (en) * | 2009-12-25 | 2010-09-01 | 中国电子科技集团公司第四十研究所 | Solid state power controller |
| CN103458554B (en) * | 2012-05-30 | 2017-06-23 | 海洋王照明科技股份有限公司 | A kind of LED drive circuit and LED lamp |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0142063A1 (en) * | 1983-10-19 | 1985-05-22 | Hitachi Lighting, Ltd. | Lighting apparatus for an electric discharge lamp |
| CN102469655A (en) * | 2010-11-11 | 2012-05-23 | 海洋王照明科技股份有限公司 | Light-emitting diode (LED) driving circuit |
| CN102711309A (en) * | 2011-03-28 | 2012-10-03 | 海洋王照明科技股份有限公司 | LED (Light Emitting Diode) driving circuit and lamp |
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Address after: 4 / F, building 1, No.14 Jiuxianqiao Road, Chaoyang District, Beijing 100020 Patentee after: Beijing Jingwei Hirain Technologies Co.,Inc. Address before: 8 / F, block B, No. 11, Anxiang Beili, Chaoyang District, Beijing 100101 Patentee before: Beijing Jingwei HiRain Technologies Co.,Ltd. |
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