CN103917021B - A kind of LED lamp based on electronic light modulator light modulation shading process and system - Google Patents
A kind of LED lamp based on electronic light modulator light modulation shading process and system Download PDFInfo
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- CN103917021B CN103917021B CN201410098198.1A CN201410098198A CN103917021B CN 103917021 B CN103917021 B CN 103917021B CN 201410098198 A CN201410098198 A CN 201410098198A CN 103917021 B CN103917021 B CN 103917021B
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- led lamp
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Abstract
The present invention open LED lamp based on electronic light modulator light modulation shading process, including: first with electronic light modulator, supply voltage is modulated into digital signal, then utilizing demodulator circuit and microprocessor modulated supply voltage to be demodulated and reduced brightness regulated signal or colour temperature regulation signal, last drive circuit regulates signal according to corresponding brightness regulated signal or colour temperature and drives LED lamp work.Wherein, digital signal demodulated be reduced into brightness regulated signal or colour temperature regulation signal be by microprocessor Starting mode determine；When microprocessor is cold start-up, digital signal is demodulated is reduced into brightness regulated signal, is i.e. realized the regulation of LED lamp brightness by electronic light modulator regulation voltage；When microprocessor is thermal starting, digital signal is demodulated is reduced into colour temperature regulation signal, is i.e. realized the regulation of LED lamp colour temperature by electronic light modulator regulation voltage output.The present invention also provides for a kind of system using above-mentioned LED lamp light modulation shading process.
Description
Technical field
The present invention relates to LED lamplight and control technical field, particularly relate to one and only utilize an electronic light modulator
LED lamp is carried out the method and system of light modulation toning.
Background technology
LED, as a kind of novel illumination instrument, has the features such as efficient, energy-conservation, long-lived, environmental protection because of it,
It is increasingly becoming main force's product of a new generation's illumination market.Compared with traditional lighting engineering, LED lamp by
In having multiple illuminating source, as long as the glow color brightness ratio of each illuminating source is arranged to difference, can
Conveniently realize the colour temperature regulation of LED lamp.
At present, in terms of the control and regulation of LED lamplight, the modulation instrument being most frequently with is electronic light modulator,
Utilize the electronic switching tube circuit such as controllable silicon, field effect transistor, IGBT or transistor that the phase place of input voltage is entered
Row cutting, changes the virtual value of input voltage, and then reaches the purpose of light modulation.But, this simple exchange
The regulation of conductance current flow angle, can only change the light output intensity of LED lamp, i.e. the simply regulation in brightness,
This variable of colour temperature can not be control effectively.To carry out colour temperature regulation, it is necessary to increase extra control
Device processed and circuit, not only wire connection structure is complicated, and regulates more inconvenience.
Summary of the invention
For defect present in prior art, it is an object of the present invention to provide one and only utilize one
Electronic light modulator realizes light modulation and the shading process of LED lamp.
For reaching object above, the present invention adopts the following technical scheme that.
A kind of LED lamp based on electronic light modulator light modulation shading process, it is characterised in that including: electronics
Dimmer, demodulator circuit, drive circuit, at least one LED lamp；Described electronic light modulator and external power
Connect, described demodulator circuit is connected with electronic light modulator outfan, described drive circuit connection demodulator circuit with
LED lamp；Described electronic light modulator is knob stepless adjusting switch or the slip stepless-adjustment of having electronic switching tube
Joint switch；During regulation, first with electronic light modulator, the virtual value of supply voltage is adjusted, then utilizes
Modulated supply voltage is demodulated and reduces brightness regulated signal or colour temperature and adjusts by demodulator circuit and microprocessor
Joint signal, last drive circuit regulates signal according to corresponding brightness regulated signal or colour temperature and drives LED lamp
Work.
As a kind of improvement of above-mentioned LED lamp light modulation shading process, digital signal is demodulated is reduced into brightness
Regulation signal or colour temperature regulation signal are to be determined by the Starting mode of microprocessor；
When microprocessor is cold start-up, digital signal is demodulated is reduced into brightness regulated signal, passes through electronics
Dimmer regulation voltage i.e. realizes the regulation of LED lamp brightness, at this moment color temperature constant；
When microprocessor is thermal starting, digital signal is demodulated is reduced into colour temperature regulation signal, passes through electronics
Dimmer regulation voltage output i.e. realizes the regulation of different-colour chip chamber brightness ratio, Jin Ershi in LED lamp
Existing colour temperature regulation.
As a kind of improvement of above-mentioned LED lamp light modulation shading process, described hot and cold startup is according to micro-place
Whether reason device resets before starting judges；If microprocessor occurs when resetting not yet after cutting off the electricity supply last time
It is again started up as thermal starting, if the microprocessor startup again occurred that resetted is cold opening after cutting off the electricity supply last time
Dynamic.
As a kind of improvement of above-mentioned LED lamp light modulation shading process, described hot and cold startup is by detection
Connect what the magnitude of voltage of charging capacitor on the microprocessor judged.
As a kind of improvement of above-mentioned LED lamp light modulation shading process, described hot and cold startup is by detection
The synchronizing signal of alternating current realizes；When the synchronizing signal of microprocessor detection alternating current is at continuous 2 half
The ripple above cycle is judged to thermal starting when there be not signal, and the state when microprocessor first powers on is judged to cold
Start.
The present invention also provides for a kind of system using above-mentioned LED lamp light modulation shading process, it is characterised in that
Including: electronic light modulator, demodulator circuit, drive circuit, at least one LED lamp；Described electronic dimming
Device is connected with external power, and described demodulator circuit is connected with electronic light modulator outfan, and described drive circuit connects
Demodulator circuit and LED lamp.
As a kind of improvement of said system, described electronic light modulator is the knob stepless-adjustment of having electronic switching tube
Joint switch or slip stepless adjusting switch, this electronic switching tube is controllable silicon, field effect transistor, IGBT or crystal
Pipe.
As a kind of improvement of said system, described demodulator circuit includes the lock-out pulse detection being cascaded
Circuit and demodulation microprocessor；Described lock-out pulse testing circuit is connected with modulated signal outfan, described solution
Microprocessor is adjusted to be connected with drive circuit.
As the further improvement of said system, demodulation microprocessor connects and has capacitor charge and discharge detection electricity
Road.
As a kind of improvement of said system, described LED lamp includes the lamp group of at least two different-colour,
The lamp group of corresponding every kind of colour temperature is provided with LED drive circuit, and LED lamp drive circuit includes that constant-current source drives and PWM
Voltag driving circuit.
Compared with prior art, LED lamp based on the electronic light modulator light modulation shading process that the present invention provides,
By input voltage is carried out voltage output by universal electric dimmer, and utilize microprocessor to LED lamp
Shaping modes switch over so that have only to universal electric dimmer can realize LED lamp light modulation and
Toning, easy to adjust.Simultaneously as utilize this method to realize light modulation and the separate regulation of toning, color-temperature regulating
Not interfereing with each other with degree of lightening, facilitate user's brightness needed for main separation and colour temperature, practicality is good.
The light modulation tinting system of a kind of LED lamp that the present invention provides, by universal electric dimmer, demodulation electricity
Road and two-way lamp source drive organic assembling, it is only necessary to universal electric dimmer can realize the light modulation of LED lamp
And toning, circuit structure is simple.
Accompanying drawing explanation
It it is the capacitor charge and discharge testing circuit figure of microprocessor described in Fig. 1；
Fig. 2 show the change in voltage figure in charge and discharge process of charging capacitor in Fig. 1；
Fig. 3 show the theory diagram of light modulation tinting system；
Fig. 4 is the theory diagram of demodulator circuit.
Description of reference numerals:
1, electronic light modulator, 2, demodulator circuit, 3, drive circuit, 4, LED lamp；
21, lock-out pulse testing circuit, 22, demodulation microprocessor 23, capacitor charge and discharge testing circuit.
Detailed description of the invention
The essence of the present invention it is more fully understood that, below in conjunction with the accompanying drawings to this for convenience of those of ordinary skill in the art
The detailed description of the invention of invention is described in detail.
Embodiment of the method
A kind of LED lamp based on electronic light modulator light modulation shading process, comprises the following steps: first electricity consumption
The virtual value of supply voltage is adjusted by sub-dimmer, then utilizes demodulator circuit and microprocessor to modulate
The supply voltage crossed demodulate and reduce brightness regulated signal or colour temperature regulation signal, last drive circuit is according to phase
The brightness regulated signal answered or colour temperature regulation signal drive LED lamp work.
Wherein, brightness and the colour temperature of LED lamp is separate regulation.Concrete regulative mode is: during degree of lightening,
Color temperature constant；During color-temperature regulating, brightness constancy.One benefit of separate regulation is: color-temperature regulating and degree of lightening are mutual
Not disturbing, facilitate user's brightness needed for main separation and colour temperature, practicality is good.
As for being color-temperature regulating in what situations, it is degree of lightening in what situations, with the Starting mode of microprocessor
Determine.When microprocessor is cold start-up, entering light-modulating mode, digital signal is reduced into by microprocessor
Brightness regulated signal, regulates voltage by electronic light modulator, realizes when the electric phase place zero crossing detected
The regulation of LED lamp brightness.When microprocessor is thermal starting, entering toner pattern, microprocessor is by number
Word signals revivification becomes colour temperature to regulate signal, realizes in LED lamp not when the electric phase place zero crossing detected
With the regulation of colour temperature chip chamber brightness ratio, and then realize colour temperature regulation.In other embodiments, light modulation mould
Formula and toner pattern also can be exchanged, and making microprocessor is cold start-up correspondence toner pattern, and making microprocessor is heat
Start corresponding light-modulating mode, be not limited to the present embodiment.
More specifically, microprocessor is cold start-up or thermal starting on earth, it is to be according to before microprocessor startup
No reset judges.If what after cutting off the electricity supply last time, microprocessor occurred when resetting not yet is again started up, it is
Thermal starting, if occur after after cutting off the electricity supply last time, microprocessor resets is again started up, for cold start-up.
As it is shown in figure 1, it is to connect capacitor charge and discharge testing circuit figure on the microprocessor, practical operation
During, connect the magnitude of voltage of charging capacitor on the microprocessor to distinguish hot and cold startup with detection.From figure
It can be seen that when power supply of microprocessor disconnects in 2, charge and discharge capacitance C have one discharge time section T, T's
Length is different according to varying in size of charge and discharge capacitance.Take a fiducial time t shorter than section T discharge time
As basis for estimation, when charge and discharge capacitance C is when occurring recharged in t fiducial time, it is considered as thermal starting；
When charge and discharge capacitance C is when occurring recharged outside t fiducial time, it is considered as cold start-up.Use charge and discharge capacitance
The magnitude of voltage of C distinguishes a benefit of hot and cold startup: can be by changing the size of charge and discharge capacitance C
Change section T discharge time, so on the basis of time t provide and adjust basis, conveniently realize t's fiducial time
Freely regulate.
Certainly, distinguishing hot and cold startup above according to the magnitude of voltage of charging capacitor on microprocessor is this
A bright better embodiment.In other embodiments, described hot and cold startup is also by detecting micro-place
The waveform change of reason device driving voltage realizes.When the synchronizing signal of microprocessor detection alternating current is continuously
2 half-wave above cycles are judged to thermal starting when there be not signal, and the state when microprocessor first powers on is sentenced
It is set to cold start-up.
Certainly, distinguishing hot and cold startup above according to the magnitude of voltage of charging capacitor on microprocessor is this
A bright better embodiment.In other embodiments, described hot and cold startup is also by detection exchange
Electricity synchronizing signal realizes.When microprocessor detection synchronizing signal is at two or more half wave cycles no letter
Number time be judged to thermal starting, the state when microprocessor first powers on is judged to cold start-up.Hand at 50Hz
Under stream electricity, 1 half wave cycles is exactly 10ms, and 2 half-waves are 20ms.
During actual light modulation toning, first turn on the switch of electronic light modulator, subsequently into regulation luminance patterns,
After brightness regulation completes, connecting power supply after closing rapidly, now light fixture just braking enters into regulation colour temperature at once
Pattern.After regulation colour temperature size confirms, stabilization time after 2 seconds, closes power supply, opens tune after 5 seconds again
Light device, enters the most again light-modulating mode, has recovered original operation.
Light modulation tinting system embodiment
As it is shown on figure 3, the light modulation tinting system of a kind of LED lamp using preceding method, including: electronics is adjusted
Light device 1, demodulator circuit 2, drive circuit 3, and at least one LED lamp 4；Described electronic light modulator is with outer
Power supply connects, and described demodulator circuit is connected with electronic light modulator outfan, and described drive circuit connects demodulation electricity
Road and LED lamp.
In the present embodiment, preferred electron dimmer 1 is knob stepless adjusting switch, to realize LED lamp brightness
Continuously adjustabe with colour temperature；Preferably LED lamp is the double-colored temperature light fixture containing white light group and yellow fluorescent lamp group, right
The lamp group of every kind of colour temperature should be provided with a constant-current drive circuit.Certainly, a kind of equivalence as the present embodiment is real
Executing mode, described electronic light modulator slip stepless adjusting switch substitutes, and described LED lamp is with containing white light
Organize the double-colored temperature light fixture with blue-ray light group or with containing white light group, yellow fluorescent lamp group, three color temperature lamps of blue-ray light group
Tool substitutes.
As shown in Figure 4, described demodulator circuit 2 includes lock-out pulse testing circuit 21 and the demodulation being cascaded
Microprocessor 22.Described lock-out pulse testing circuit 21 is connected with modulated signal outfan, the micro-place of described demodulation
Reason device 22 is connected with drive circuit.Demodulation microprocessor 22 is also associated with capacitor charge and discharge testing circuit
23, it is used for the charge status of the microprocessor 22 of detection demodulation in real time.
The essence of the present invention has been described in detail by above detailed description of the invention, but can not come this with this
The protection domain of invention limits.It should be evident that under the enlightenment of essence of the present invention, the art
Those of ordinary skill also can carry out many improvement and modification, it should be noted that these improve and modify all to fall
Within the claims of the present invention.
Claims (8)
1. LED lamp based on an electronic light modulator light modulation shading process, it is characterised in that including: electronic light modulator, demodulator circuit, drive circuit, at least one LED lamp；Described electronic light modulator is connected with external power, and described demodulator circuit is connected with electronic light modulator outfan, and described drive circuit connects demodulator circuit and LED lamp；Described electronic light modulator is knob stepless adjusting switch or the slip stepless adjusting switch of having electronic switching tube；
During regulation, first with electronic light modulator, the virtual value of supply voltage is adjusted, then utilizing demodulator circuit and microprocessor modulated supply voltage to be demodulated and reduced brightness regulated signal or colour temperature regulation signal, last drive circuit regulates signal according to corresponding brightness regulated signal or colour temperature and drives LED lamp work；
Digital signal is demodulated is reduced into brightness regulated signal or colour temperature regulation signal is to be determined by the Starting mode of microprocessor；
When microprocessor is cold start-up, digital signal is demodulated is reduced into brightness regulated signal, is i.e. realized the regulation of LED lamp brightness, at this moment color temperature constant by electronic light modulator regulation voltage；
When microprocessor is thermal starting, digital signal is demodulated is reduced into colour temperature regulation signal, i.e. realizes the regulation of different-colour chip chamber brightness ratio in LED lamp by electronic light modulator regulation voltage output, and then realizes colour temperature regulation.
A kind of LED lamp based on electronic light modulator the most according to claim 1 light modulation shading process, it is characterised in that whether described cold start-up, described thermal starting reset before starting according to microprocessor judges；If what after cutting off the electricity supply last time, microprocessor occurred when resetting not yet be again started up for thermal starting, if the microprocessor startup again occurred that resetted is cold start-up after cutting off the electricity supply last time.
A kind of LED lamp based on electronic light modulator the most according to claim 1 light modulation shading process, it is characterised in that described cold start-up, described thermal starting are to connect the magnitude of voltage of charging capacitor on the microprocessor by detection to judge.
A kind of LED lamp based on electronic light modulator the most according to claim 1 light modulation shading process, it is characterised in that described cold start-up, described thermal starting are to be realized by the synchronizing signal of detection alternating current；When the synchronizing signal of microprocessor detection alternating current is judged to thermal starting when continuous 2 half-wave above cycles there are not signal, and the state when microprocessor first powers on is judged to cold start-up.
A kind of LED lamp based on electronic light modulator the most according to claim 1 light modulation shading process, it is characterised in that described electronic switching tube is controllable silicon, field effect transistor, IGBT or transistor.
A kind of LED lamp based on electronic light modulator the most according to claim 1 light modulation shading process, it is characterised in that described demodulator circuit includes lock-out pulse testing circuit and the demodulation microprocessor being cascaded；Described lock-out pulse testing circuit is connected with modulated signal outfan, and described demodulation microprocessor is connected with drive circuit.
A kind of LED lamp based on electronic light modulator the most according to claim 6 light modulation shading process, it is characterised in that connect on demodulation microprocessor and have capacitor charge and discharge testing circuit.
A kind of LED lamp based on electronic light modulator the most according to claim 1 light modulation shading process, it is characterized in that, described LED lamp includes the lamp group of at least two different-colour, the lamp group of corresponding every kind of colour temperature is provided with LED drive circuit, and LED lamp drive circuit includes that constant-current source drives and PWM Voltag driving circuit.
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| CN201410098198.1A CN103917021B (en) | 2014-03-14 | 2014-03-14 | A kind of LED lamp based on electronic light modulator light modulation shading process and system |
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| CN201410098198.1A CN103917021B (en) | 2014-03-14 | 2014-03-14 | A kind of LED lamp based on electronic light modulator light modulation shading process and system |
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| CN104507219A (en) * | 2014-12-15 | 2015-04-08 | 深圳市启明和丰照明科技有限公司 | LED (light-emitting diode) silicon controlled intelligent power supply with color temperature adjustment function and LED lamp |
| CN106358338A (en) * | 2016-08-16 | 2017-01-25 | 上海互兴科技股份有限公司 | Intelligent light-color regulation dual-output LED power supply |
| CN110475403B (en) * | 2019-07-22 | 2021-06-11 | 鹰潭阳光照明有限公司 | Color temperature setting method and circuit of intelligent dimmable LED lamp |
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| TW201306659A (en) * | 2011-07-20 | 2013-02-01 | Yu-Sheng Suo | Method for manual and automatic dimming and device thereof |
| CN103124458B (en) * | 2013-01-04 | 2016-04-06 | 安提亚科技股份有限公司 | The control method of LED matrix and colour temperature and brightness and device |
| 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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