CN110337160A - Lighting system - Google Patents
Lighting system Download PDFInfo
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- CN110337160A CN110337160A CN201910626015.1A CN201910626015A CN110337160A CN 110337160 A CN110337160 A CN 110337160A CN 201910626015 A CN201910626015 A CN 201910626015A CN 110337160 A CN110337160 A CN 110337160A
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- Prior art keywords
- circuit
- light source
- pulse width
- width modulating
- signal
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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
-
- 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]
Abstract
The present invention provides a kind of lighting systems, comprising: integrating circuit, the input terminal of integrating circuit access pulse width modulating signal, and integrating circuit is used to pulse width modulating signal being converted to analog signal；Driving circuit, the control terminal of the output end access driving circuit of integrating circuit；The output end of light source, driving circuit is connected with light source；Wherein, the corresponding duty ratio of pulse width modulating signal voltage corresponding to analog signal is directly proportional.Lighting system provided by the invention avoids light source stroboscopic problem caused by directly dimming by PWM.Simultaneously, since the duty ratio of the pulse width modulating signal of the voltage value and input of the analog signal of integrating circuit output is proportional, so that synchronous with PWM dim signal by the process that analog signal adjusts light-source brightness, and then no stroboscopic light modulation is realized under the premise of guaranteeing light modulation precision, efficiently avoid the damage caused by human body as light source stroboscopic.
Description
Technical field
The present invention relates to lighting control technique fields, in particular to a kind of lighting system.
Background technique
Currently, the lighting apparatus of LED (Light Emitting Diode, light emitting diode) light source has been used to increase
After the functions such as light modulation, communication, " stroboscopic " problem of light source is serious.So-called stroboscopic just refers to the continuous fluctuation of light in switch periods
Or flashing.Correlative study shows that the stroboscopic under specific frequency will lead to headache, eye fatigue and light sensitivity epileptics, eyesight
Decline, the harm such as dispersion attention.
Therefore, a kind of lighting system is needed at present to solve the stroboscopic problem of the light source with dimming function.
Summary of the invention
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies.
For this purpose, it is an object of the invention to propose a kind of lighting system.
In view of this, according to an aspect of the invention, there is provided a kind of lighting system, comprising: integrating circuit, integral electricity
Road is used to pulse width modulating signal being converted to analog signal；Driving circuit, driving circuit are connect with integrating circuit, are received and
From the analog signal of integrating circuit；Light source works under the driving of driving circuit；Wherein, pulse width modulating signal is corresponding
Duty ratio voltage corresponding to analog signal is directly proportional.
Lighting system provided by the invention includes integrating circuit, driving circuit and light source, and wherein integrating circuit is by input
Pulse width modulation (PWM, Pulse-Width Modulation) signal is converted to analog signal, dims to avoid due to PWM
Caused light source stroboscopic；The control terminal of driving circuit is connected with the output end of integrating circuit, under the control of analog signal
Corresponding driving signal is generated, and driving signal is transferred to light source, so that light source is shone by driving signal.Wherein, pulse
Bandwidth modulation signals realize light modulation by adjusting duty ratio, and the corresponding voltage of analog signal and pulse width modulating signal are at just
Than, therefore the light source under analog signal control has obtained the dimming effect with PWM dimming synchronization.
Lighting system provided by the invention is arranged integrating circuit for pulse width modulating signal in systems and is converted to simulation
Signal controls driving circuit by the analog signal being converted to and light source is driven to be illuminated, avoids and directly dimmed by PWM
Caused by light source stroboscopic problem.Simultaneously as the voltage value of the analog signal of integrating circuit output and the pulse width tune of input
The duty ratio of signal processed is proportional, so that it is synchronous with PWM dim signal by the process that analog signal adjusts light-source brightness,
And then no stroboscopic light modulation is realized under the premise of guaranteeing light modulation precision, it efficiently avoids causing human body due to light source stroboscopic
Damage.
In addition, the lighting system in the above-mentioned technical proposal provided according to the present invention, can also have following supplementary technology
Feature:
In the above-mentioned technical solutions, further, integrating circuit include first resistor and connect with first resistor first
Capacitor.
In the technical scheme, integrating circuit includes first resistor and first capacitor, and specifically, first resistor is accessed in drive
Between dynamic circuit and the input terminal of pulse width modulating signal, one end of first resistor receives pulse width modulating signal, another
End is connected with first capacitor and driving circuit.One end of first capacitor is accessed between first resistor and driving circuit, and first
The other end of capacitor is grounded.It is low in cost by the way that first resistor and first capacitor are arranged in the integration circuit, while can be effectively
Analog signal is converted by pulse width modulating signal.
In any of the above-described technical solution, further, the corresponding first resistor value of first resistor is corresponding with first capacitor
Capacitance product be more than or equal to the pulse width modulating signal corresponding period.
In the technical scheme, the voltage value of analog signal and the pulse width of input to export integrating circuit are modulated
The duty ratio of signal is directly proportional, need to meet the product of the corresponding first resistor value of first resistor capacitance corresponding with first capacitor
Period corresponding more than or equal to pulse width modulating signal.Specifically, the selected corresponding first resistor value of first resistor with
When the product of the corresponding capacitance of first capacitor is more than or equal to pulse width modulating signal corresponding period, if pulse width is modulated
Signal corresponding period and amplitude are constant (only adjusting duty ratio), then have the duty ratio of pulse width modulating signal bigger, lead to
The voltage for crossing the analog signal obtained after first resistor is bigger, and the duty ratio of pulse width modulating signal is smaller, passes through the first electricity
The voltage of the analog signal obtained after resistance is smaller.Meet the voltage value of analog signal and the duty ratio of pulse width modulating signal
It is directly proportional.
In any of the above-described technical solution, further, based on the feelings that the pulse width modulating signal corresponding period is constant
Under condition, the product of first resistor value and capacitance amplitude corresponding with pulse width modulating signal is inversely proportional.
In the technical scheme, when integrating circuit is arranged, the product and pulse width tune of first resistor value and capacitance
The corresponding amplitude of signal processed is inversely proportional.Specifically, in the case where the pulse width modulating signal corresponding period is constant, if increased
Add the amplitude of pulse width modulating signal, then needs the corresponding first resistor resistance value of corresponding reduction first resistor and the first electricity
Hold corresponding capacitance.If reducing the amplitude of pulse width modulating signal, need corresponding to increase first resistor corresponding the
One resistance and the corresponding capacitance of first capacitor.
In any of the above-described technical solution, further, lighting system further include: pulse width modulating signal generates electricity
Road, pulse width modulating signal generation circuit is connect with integrating circuit, for generating pulse width modulating signal.
In the technical scheme, pulse width modulating signal generation circuit is provided in lighting system, for according to upper
The dimmer command that the equipment such as machine, controller issue generates corresponding pulse width modulating signal.Specifically, pulse width modulation letter
Number output end of generation circuit is connected with the input terminal of integrating circuit, and the pulse width modulating signal of generation is transferred to integral
Circuit, to generate the analog signal for controlling driving circuit by integrating circuit.
In any of the above-described technical solution, further, lighting system further include: filter circuit, filter circuit and driving
The output end of circuit is connected with light source, and filter circuit is used to filter out the ripple in the electric signal of driving circuit output, Yi Ji
It is light source power supply in the case where the output cut-off of driving circuit.
In the technical scheme, lighting system is additionally provided with filter circuit, and filter circuit is used for what driving circuit exported
The ripple in the electric signal of light source luminescent is driven to filter out, so that the driving signal of light source is more stable.Meanwhile filter circuit
It can also discharge when driving circuit exports and ends, to provide electric energy for light source, avoid light source when driving circuit exports and ends
Stop shining immediately or brightness is greatly reduced, further increases the stability of light source brightness of illumination.
In any of the above-described technical solution, further, filter circuit includes: the second capacitor, and the second capacitor is electrolysis electricity
Hold, the anode of the second capacitor is connected with the anode of light source, and the cathode of the second capacitor is connected with the cathode of light source.
In the technical scheme, filter circuit includes the second capacitor, the second capacitor selection electrolytic capacitor, and the second capacitor
Anode is connected with the anode of light source, and the cathode of the second capacitor is connected with the cathode of light source.When driving circuit normally exports,
The electric signal of driving circuit output on the one hand for light source provides electric energy so that light source luminescent, on the other hand for the second capacitor fill can,
So that the second capacitor gathers strength.When driving circuit exports and ends, the second capacitor starts electric discharge to provide electric energy for light source, keeps away
Exempt from light source to stop shining immediately when driving circuit exports and ends or brightness is greatly reduced, further increases light source brightness of illumination
Stability.
In any of the above-described technical solution, further, lighting system further include: second resistance, filter circuit pass through the
Two resistance are connected with light source.
In the technical scheme, second resistance is provided between filter circuit and light source, filter circuit passes through second resistance
It is connected with light source, second resistance can consume the overcurrent generated when filter circuit electric discharge, to protect light source will not be by excessively electric
Stream damage.
In any of the above-described technical solution, further, lighting system further include: bleeder circuit, the both ends of bleeder circuit
It is connected respectively with integrating circuit and driving circuit.
In the technical scheme, lighting system further includes bleeder circuit, bleeder circuit connection and integrating circuit and driving electricity
Between road, for dividing to the analog signal that integrating circuit exports, the excessively high damage of analog signal voltage is on the one hand avoided to drive
Dynamic circuit, on the other hand can be improved control precision.
In any of the above-described technical solution, further, bleeder circuit includes 3rd resistor and in parallel with 3rd resistor
4th resistance.
In the technical scheme, bleeder circuit is resistor voltage divider circuit, specifically includes 3rd resistor and parallel with one another
Four resistance.It is divided by the analog signal that 3rd resistor and the 4th resistance export integrating circuit.
Additional aspect and advantage of the invention will become obviously in following description section, or practice through the invention
Recognize.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 shows the structural block diagram of lighting system according to one embodiment of present invention；
Fig. 2 shows the circuit diagrams of lighting system middle according to one embodiment of present invention；
Fig. 3 shows the schematic diagram of integrating circuit according to one embodiment of present invention；
Fig. 4 shows the schematic diagram of lighting system workflow according to one embodiment of present invention.
Wherein, the corresponding relationship in Fig. 1 and Fig. 2 between appended drawing reference and component names are as follows:
100 lighting systems, 102 integrating circuit, 104 driving circuits, 106 light sources, 108 pulse width modulating signals generate electricity
Road, 110 filter circuits, 112 bleeder circuits.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real
Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
Referring to lighting system described in Fig. 1 to Fig. 4 description according to some embodiments of the invention.
Embodiment one
As depicted in figs. 1 and 2, according to an aspect of the invention, there is provided a kind of lighting system 100 includes: integral electricity
Road 102, driving circuit 104 and light source 106.
Specifically, the input terminal of integrating circuit 102 accesses pulse width modulating signal, and integrating circuit is used for pulse width
Modulated signal is converted to analog signal；The control terminal of the output end access driving circuit 104 of integrating circuit 102；Driving circuit 104
Output end be connected with light source 106, light source 106 works under the driving of driving circuit 104；Wherein, pulse width modulation letter
Number corresponding duty ratio voltage corresponding to analog signal is directly proportional.
In this embodiment, lighting system includes integrating circuit 102, driving circuit 104 and light source 106, wherein integral electricity
Pulse width modulation (PWM, Pulse-Width Modulation) signal of input is converted to analog signal by road 102, to keep away
Exempt from 106 stroboscopic of light source caused by dimming due to PWM；The control terminal of driving circuit 104 is connected with the output end of integrating circuit 102
It connects, to generate corresponding driving signal under the control of analog signal, and driving signal is transferred to light source 106, so that light source
106 are shone by driving signal.Wherein, pulse width modulating signal realizes light modulation, analog signal pair by adjusting duty ratio
The voltage answered is directly proportional to pulse width modulating signal, therefore the light source 106 under analog signal control has obtained dimming with PWM
Synchronous dimming effect.
Integrating circuit 102 is arranged in systems and converts pulse width modulating signal for lighting system provided in this embodiment
For analog signal, driving circuit 104 is controlled by the analog signal being converted to, light source 106 is driven to be illuminated, avoided straight
Connected 106 stroboscopic problem of light source caused by PWM light modulation.Simultaneously as the voltage value for the analog signal that integrating circuit 102 exports
It is proportional with the duty ratio of the pulse width modulating signal of input, so that adjusting 106 brightness of light source by analog signal
Process is synchronous with PWM dim signal, and then no stroboscopic light modulation is realized under the premise of guaranteeing light modulation precision, efficiently avoids
Since 106 stroboscopic of light source is damaged caused by human body.
Optionally, light source 106 is LED (Light Emitting Diode, Organic Light Emitting Diode) light source.
Optionally, driving circuit 104 includes MT7282 driving chip, and driving circuit 104 connects power supply and integral electricity
The electric energy that power supply inputs is converted according to 102 analog signal of integrating circuit and is exported as voltage V by road 1020With electric current I0, lead to
Overvoltage V0With electric current I0For the power supply of light source 106.
Embodiment two
In one embodiment of the present of invention, lighting system 100 includes: integrating circuit 102, driving circuit 104 and light source
106.Wherein, as shown in figure 3, integrating circuit 102 includes first resistor R1With with first resistor R1The first capacitor C of connection1。
In this embodiment, integrating circuit 102 selects lower-cost resistance and capacitor to realize.Specifically, the first electricity
Hinder R1It accesses between driving circuit 104 and the input terminal of pulse width modulating signal, first resistor R1One end receive pulse it is wide
Spend modulated signal, the other end and first capacitor C1It is connected with driving circuit 104.First capacitor C1One end access in first electricity
Hinder R1Between driving circuit 104, first capacitor C1The other end ground connection.
Pulse width modulating signal (i.e. pwm signal) includes three parameters such as frequency F, range value A and duty ratio M, wherein
Frequency F is not less than 1kHz；The range of range value A is 3.3V to 12V；The range of duty ratio M is 0% to 100%.First resistor R1
It is corresponding that the product of corresponding first resistor value R capacitance C corresponding with first capacitor is more than or equal to pulse width modulating signal
Period.
For make integrating circuit 102 export analog signal voltage value and input pulse width modulating signal duty ratio
It is directly proportional, first resistor R need to be met1Corresponding first resistor R1The product for being worth capacitance corresponding with capacitor is more than or equal to pulse
The bandwidth modulation signals corresponding period.
It can specifically be expressed by following formula:
R×C≥10T；
Wherein R is first resistor R1Resistance value, C is first capacitor C1Capacitance, T is the duration in pwm signal any period.
Having selected first resistor R1And second resistance, and after the pwm signal of input has been determined, that is, have that RC is constant, PWM letter
Number cycle T and range value A also constant situation, when the duty ratio M of pwm signal is bigger, simulation that integrating circuit 102 exports
The voltage value Vj of signal is then bigger, when the duty ratio M of pwm signal is smaller, the voltage for the analog signal that integrating circuit 102 exports
Value Vj is then smaller, i.e. the duty ratio M direct proportionality of the pwm signal of the voltage value Vj and input of gained analog signal.
Further, based on the pulse width modulating signal corresponding period it is constant in the case where, first resistor R1Value and electricity
The product of capacitance amplitude corresponding with pulse width modulating signal is inversely proportional.
When integrating circuit 102 is arranged, since first resistor R need to be met1Corresponding first resistor R1Value R is corresponding with capacitor
Capacitance C product be more than or equal to the corresponding cycle T of pulse width modulating signal.And when the cycle T of pwm signal is constant,
If increasing the range value A of pwm signal, corresponding reduction first resistor R is needed1Corresponding first resistor value R and first capacitor C1It is corresponding
Capacitance C, to meet needs.
Embodiment three
As depicted in figs. 1 and 2, in one embodiment of the present of invention, lighting system 100 includes: pulse width modulating signal
Generation circuit 108, integrating circuit 102, driving circuit 104 and light source 106.Wherein, pulse width modulating signal generation circuit 108
The input terminal of integrating circuit 102 is accessed, pulse width modulating signal generation circuit 108 is for generating pulse width modulating signal.
In this embodiment, pulse width modulating signal generation circuit 108 is provided in lighting system, for according to upper
The dimmer command that the equipment such as machine, controller issue generates corresponding pulse width modulating signal.Specifically, pulse width modulation letter
The output end of number generation circuit 108 is connected with the input terminal of integrating circuit 102, and the pulse width modulating signal of generation is transmitted
To integrating circuit 102, to generate the analog signal for controlling driving circuit 104 by integrating circuit 102.
Optionally, pulse width modulating signal generation circuit 108 and controller (MCU, Micro Controller Unit)
It is connected, the brightness regulation instruction generated according to MCU changes the duty ratio of pwm signal.
Optionally, pulse width modulating signal generation circuit 108 is connected with communication unit, is received according to communication unit
Brightness regulation instruction change pwm signal duty ratio.Wherein, communication unit can be bluetooth unit, Wi-Fi unit (Wi-Fi
The wireless local area network technology based on 802.11 standard of IEEE of alliance's creation), one of radio frequency unit or a variety of.
Example IV
As depicted in figs. 1 and 2, in one embodiment of the present of invention, lighting system 100 includes: pulse width modulating signal
Generation circuit 108, integrating circuit 102, driving circuit 104, filter circuit 110 and light source 106.Wherein, filter circuit 110 and drive
The output end of dynamic circuit 104 is connected with light source 106, and filter circuit 110 is used to filter out in the electric signal of the output of driving circuit 104
Ripple, and driving circuit 104 output cut-off in the case where for light source 106 power.
In this embodiment, lighting system 100 is additionally provided with filter circuit 110, and filter circuit 110 is by driving circuit 104
Ripple in the electric signal for driving light source 106 luminous of output filters out, so that the driving signal of light source 106 is more steady
It is fixed.Meanwhile filter circuit 110 can also discharge when driving circuit 104 exports and ends, and to provide electric energy for light source 106, avoid
Light source 106 stops shining immediately when driving circuit 104 exports and ends or brightness is greatly reduced, and further increases the photograph of light source 106
The stability of brightness.
Specifically, filter circuit 110 includes: the second capacitor C2, the second capacitor C2For electrolytic capacitor, the second capacitor C2Just
Pole is connected with the anode of light source 106, the second capacitor C2Cathode be connected with the cathode of light source 106.
Lighting system further include: second resistance, filter circuit 110 are connected by second resistance with light source 106.
Filter circuit 110 is connected by second resistance with light source 106, and second resistance can consume filter circuit 110 and put
The overcurrent generated when electric, to protect light source 106 not damaged by overcurrent.
Wherein, the second capacitor C2Select electrolytic capacitor, and the second capacitor C2Anode be connected with the anode of light source 106, the
Two capacitor C2Cathode be connected with the cathode of light source 106.When driving circuit 104 normally exports, what driving circuit 104 exported
Electric signal on the one hand be light source 106 electric energy is provided so that light source 106 shine, be on the other hand the second capacitor C2Energy is filled, so that the
Two capacitor C2It gathers strength.When driving circuit 104 exports and ends, the second capacitor C2Start electric discharge to provide electricity for light source 106
Can, it avoids light source 106 from stopping shining immediately when driving circuit 104 exports and ends or brightness is greatly reduced, further increases light
The stability of 106 brightness of illumination of source.
Embodiment five
As depicted in figs. 1 and 2, in one embodiment of the present of invention, lighting system 100 includes: integrating circuit 102, partial pressure
Circuit 112, driving circuit 104, filter circuit 110 and light source 106.Wherein, the both ends of bleeder circuit 112 respectively with integrating circuit
102 are connected with driving circuit 104.
Specifically, bleeder circuit 112 includes 3rd resistor R2With with 3rd resistor R24th resistance R in parallel3。
In this embodiment, lighting system further includes bleeder circuit 112, the connection of bleeder circuit 112 and integrating circuit 102 and
Between driving circuit 104, the analog signal for exporting to integrating circuit 102 is divided, and on the one hand avoids analog signal electric
High damage driving circuit 104 is pressed through, control precision on the other hand can be improved.
Optionally, bleeder circuit 112 is resistor voltage divider circuit, specifically includes 3rd resistor R parallel with one another2With the 4th electricity
Hinder R3.Pass through 3rd resistor R2With the 4th resistance R3The analog signal exported to integrating circuit 102 divides.
Embodiment six
As shown in Figure 2 and Figure 4, in one embodiment of the present of invention, lighting system 100 includes: integrating circuit 102, partial pressure
Circuit 112, driving circuit 104, filter circuit 110 and light source 106.When lighting system works, pass through pulse width modulating signal
Pwm signal of the generation circuit 108 according to dim signal output for light modulation, integrating circuit 102 carry out Integral Processing to pwm signal
Analog signal corresponding with pwm signal is exported afterwards.Driving chip in driving circuit 104 receives analog signal and is compared defeated
Out, final output driving signal, driving signal act on light source 106 after the filtering of filter circuit 110, and light source 106 is driving at this time
It is connected and shines under the action of dynamic signal.In the embodiment, pwm signal is adjusted to mould by using simple integrating circuit 102
Intelligent dimming is realized to driving chip after quasi- signal, then ripple output, the mode solution of combination are reduced by filter circuit 110
It has determined desk lamp stroboscopic problem.
Further, driving circuit 104 connects power supply Vin and integrating circuit 102, output voltage Vo, and electric current is
Io improves the amplitude of power supply Vin to Vo from Vin to filter circuit 110, driving circuit 104, and controls output electric current Io；
The increase for the analog signal Vj that Io is exported with integrating circuit and increase, analog signal Vj with the increase of the duty ratio of pwm signal and
Increase；For example, the cycle T of pwm signal is constant, range value A is constant, and RC is constant, and duty ratio M increases, then Vj increases, driving circuit
It exports electric current Io to increase, source brightness increases, conversely, driving circuit output electric current Io is reduced, light-source brightness is reduced；As duty ratio M
When increasing to 100%, output Vj reaches maximum；When duty ratio M increases to 0%, output Vj reaches minimum, by believing PWM
It number is converted to analog signal and realizes control to light source, so that output electric current is more stable, control more accurate, and then improve light source frequency
The problem of sudden strain of a muscle.
Further, on the one hand filter circuit 110 connects the output end of driving circuit 104, is on the other hand connected by resistance
Connect light source 106.
(1) when driving circuit 104, which exports, to be ended, filter circuit 110 discharges to light source 106, and light source 106 will not be because of drive
The output cut-off of dynamic circuit 104 and occur that voltage reduces and there is a situation where brightness to change generation.
(2) when driving circuit 104, which exports, to be connected, driving circuit 104 exports stable voltage Vo and electric current Io to light source
106, light source stroboscopic will not occur because of voltage Vo and the unstable of electric current Io.
(3) change output electric current Io by changing the duty ratio M of pwm signal, to change the brightness of light source；Work as duty
Increase than M, output electric current Io increases, and the brightness of light source increases, and then realizes effective adjusting to light source stroboscopic problem.
In the present invention, term " multiple " then refers to two or more, unless otherwise restricted clearly.Term " peace
Dress ", " connected ", " connection ", the terms such as " fixation " shall be understood in a broad sense, can also be with for example, " connection " may be a fixed connection
It is to be detachably connected, or be integrally connected；" connected " can be directly connected, can also be indirectly connected through an intermediary.It is right
For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the invention
It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or reality
Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more of the embodiments or examples with
Suitable mode combines.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of lighting system characterized by comprising
Integrating circuit, the integrating circuit are used to pulse width modulating signal being converted to analog signal；
Driving circuit, the driving circuit are connect with the integrating circuit, receive the analog signal from the integrating circuit；
Light source works under the driving of the driving circuit；
Wherein, the corresponding duty ratio of pulse width modulating signal voltage corresponding to the analog signal is directly proportional.
2. lighting system according to claim 1, which is characterized in that
The integrating circuit includes first resistor and the first capacitor that connect with the first resistor.
3. lighting system according to claim 2, which is characterized in that
The product of the corresponding first resistor value of first resistor capacitance corresponding with the first capacitor is more than or equal to described
The pulse width modulating signal corresponding period.
4. lighting system according to claim 3, which is characterized in that
Based on the pulse width modulating signal corresponding period it is constant in the case where, the first resistor value and the capacitance
Product amplitude corresponding with the pulse width modulating signal be inversely proportional.
5. lighting system according to claim 1, which is characterized in that further include:
Pulse width modulating signal generation circuit, the pulse width modulating signal generation circuit are connect with the integrating circuit,
For generating the pulse width modulating signal.
6. lighting system according to any one of claim 1 to 5, which is characterized in that further include:
Filter circuit, the filter circuit are connected with the output end of the driving circuit and the light source, the filter circuit
The ripple in electric signal for filtering out the driving circuit output, and in the case where the output of driving circuit cut-off
For the light source power supply.
7. lighting system according to claim 6, which is characterized in that the filter circuit includes:
Second capacitor, second capacitor are electrolytic capacitor, and the anode of second capacitor is connected with the anode of the light source,
The cathode of second capacitor is connected with the cathode of the light source.
8. lighting system according to claim 6, which is characterized in that further include:
Second resistance, the filter circuit are connected by the second resistance with the light source.
9. lighting system according to any one of claim 1 to 5, which is characterized in that further include:
Bleeder circuit, the both ends of the bleeder circuit are connected with the integrating circuit and the driving circuit respectively.
10. lighting system according to claim 9, which is characterized in that
The bleeder circuit includes 3rd resistor and fourth resistance in parallel with the 3rd resistor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910626015.1A CN110337160A (en) | 2019-07-11 | 2019-07-11 | Lighting system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910626015.1A CN110337160A (en) | 2019-07-11 | 2019-07-11 | Lighting system |
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| CN110337160A true CN110337160A (en) | 2019-10-15 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111609347A (en) * | 2020-06-05 | 2020-09-01 | 连云港杰瑞电子有限公司 | Deep sea lighting system suitable for 1000m application water depth range |
| CN112118655A (en) * | 2020-09-07 | 2020-12-22 | 漳州立达信光电子科技有限公司 | LED control circuit and LED lamp |
| CN112188674A (en) * | 2020-10-19 | 2021-01-05 | 美芯晟科技（北京）有限公司 | PWM dimming control method and circuit without stroboflash |
| CN113873718A (en) * | 2021-10-18 | 2021-12-31 | 成都世纪光合作用科技有限公司 | Light modulation control device |
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| CN203301797U (en) * | 2013-03-13 | 2013-11-20 | 广东恒润光电有限公司 | Dimming and toning circuit of LED table lamp |
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| CN112188674A (en) * | 2020-10-19 | 2021-01-05 | 美芯晟科技（北京）有限公司 | PWM dimming control method and circuit without stroboflash |
| CN113873718A (en) * | 2021-10-18 | 2021-12-31 | 成都世纪光合作用科技有限公司 | Light modulation control device |
| CN113873718B (en) * | 2021-10-18 | 2023-11-28 | 成都世纪光合作用科技有限公司 | Dimming control device |
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