CN101621879A - Light-adjusting driving device and method - Google Patents

Light-adjusting driving device and method Download PDF

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Publication number
CN101621879A
CN101621879A CN200810135922A CN200810135922A CN101621879A CN 101621879 A CN101621879 A CN 101621879A CN 200810135922 A CN200810135922 A CN 200810135922A CN 200810135922 A CN200810135922 A CN 200810135922A CN 101621879 A CN101621879 A CN 101621879A
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China
Prior art keywords
voltage
residual
change
control signal
dimming drive
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CN200810135922A
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Chinese (zh)
Inventor
林焕博
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林焕博
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Priority to CN200810135922A priority Critical patent/CN101621879A/en
Publication of CN101621879A publication Critical patent/CN101621879A/en

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Abstract

The invention discloses a light-adjusting driving device and a method. The method comprises the following procedures: the light-adjusting driving device receives the voltage from a power supply device and detects the variation of the voltage input into the light-adjusting driving device; in accordance with the voltage from the power supply device and the input voltage, the light-adjusting driving device correspondingly generates brightness control signals and sends the brightness control signals to an LED driver so that the LED driver can adjust the brightness of the LED lights. The light-adjusting driving device and method of the invention can still ensure that the LED driver stably outputs and drives LED when the input voltage of the LED driver varies and ensure that the LED brightness is stable without flickering due to unstable input voltage, that the LED is high in efficiency and little in color temperature variation and that the LED lights additionally have the function of adjusting the light brightness besides the original lighting function.

Description

A kind of dimming drive device and method

Technical field

The present invention relates to a kind of dimming drive device and method, relate in particular to a kind of dimming drive device and method that is applied to LED lamp lighting environment.

Background technology

Under the situation of pay attention to day by day environmental protection now, energy transition rate, for illumination,, LED changes luminous energy efficient because having preferable electric energy compared to incandescent lamp bulb, thereby in the application of lamp, the existing trend that replaces incandescent lamp gradually of LED lamp.

At present, the design focal point of the led driver of LED lamp how to be can be when input voltage changes stabilized driving LED and make its brightness constant.Utilize the advantage of this kind method for designing to be: the 1.LED brightness stability, do not make LED produce flicker because of input voltage is unstable, 2. efficient height, and the change of 3.LED colour temperature is low.Yet, its shortcoming is: the LED light modulation partly must add control signal adjusted in addition, and this has its restriction and difficulty on reality is used, reason is existing house distribution, light fixture, dimmer or the like device, can not revise or purchase again for LED does distribution.Thereby, except new product or new distribution,, be difficult to directly replace the lighting device of existing existing dimming function with the dimmer design of present LED.

In addition, on market, the LED that is directly driven with the AC alternating current is arranged at present.But shortcoming is that efficient is low, LED can glimmer with supply frequency, the LED colour temperature changes greatly, and, owing to directly driven for the AC alternating current, thereby, make LED under different voltages, have different colour temperature variations with the change of voltage.

Moreover, for existing light modulating device, all be to reach dimming function, yet fluorescent lamp, Electricity-saving lamp bulb or the like can't carry out light modulation via the effective value of adjusting supply voltage, letting alone does not have the section dimming function.Generally speaking, can use several method to reach the purpose of adjusting voltage: 1. use the variable resistor dividing potential drop, 2., control the voltage turn-on phase angle with exchanging silicon keyholed back plate (TRIAC) or SCR or the like.Described method will have only bright or the two kinds of situations of going out, and can't reach the purpose of light modulation being used for existing LED driving design.

Therefore, how can be under the situation that need not change existing distribution, existing light fixture or device, driving design in LED uses, can stabilized driving LED and directly replace existing illuminating lamp with the LED lamp, except keeping original illumination functions, also can increase dimming function, can make the LED lamp reach dimming function, and have brightness stability simultaneously, can not glimmer because of input voltage is unstable, efficient height, the low advantage of LED colour temperature change, be problem to be solved.

Summary of the invention

Main purpose of the present invention is to be to provide a kind of dimming drive device and method, be applied in the LED lamp lighting environment, under the situation that need not change existing distribution, existing light fixture or device, utilize dimming drive device of the present invention and method, make the led driver section of having or not dimming function, and then allow the LED lamp that dimming function is arranged.

Another purpose of the present invention is to be to provide a kind of dimming drive device and method, be applied in the LED lamp lighting environment, under the situation that need not change existing distribution, existing light fixture or device, when the input voltage of led driver changes, still can make led driver can stablize output and driving LED, make the LED lamp that dimming function be arranged, and provide light modulation to select and can select suitable brightness, reach the purpose of power saving environmental protection.

A further object of the present invention is to be to provide a kind of dimming drive device and method, be applied in the LED lamp lighting environment, under the situation that need not change existing distribution, existing light fixture or device, the reason input voltage is unstable and glimmer to make the LED brightness stability, and efficient height, the change of LED colour temperature are low.

To achieve these goals, the invention provides a kind of light modulation driving method, be applied in the LED lamp lighting environment, this light modulation driving method comprises following program:

Dimming drive device receives the voltage that comes from supply unit, and detecting inputs to the variable quantity of the input voltage of this dimming drive device; And

This dimming drive device is according to this voltage and this input voltage that come from this supply unit, and produce brightness control signal accordingly, and brightness control signal is sent to led driver, to allow led driver can carry out the lamplight brightness adjustment of LED lamp.

The present invention also provides a kind of light modulation driving method, is applied in the LED lamp lighting environment, and this light modulation driving method comprises following program:

The change in voltage detecting module inputs to the variable quantity of its input voltage with detecting, and the variable quantity reference signal is outputed to the residual quantity detection module;

This residual quantity detection module will relatively come from this variable quantity reference signal of this change in voltage detecting module and the residual quantity of the voltage that comes from outside supply unit, and will represent the residual quantity reference signal of this residual quantity to export the brightness control signal generator to; And

This brightness control signal generator will produce brightness control signal according to this residual quantity reference signal of coming from this residual quantity detection module, and this brightness control signal is sent to outside led driver, to allow this led driver can carry out the lamplight brightness adjustment of LED lamp.

The present invention provides a kind of dimming drive device again, is applied in the LED lamp lighting environment, and this dimming drive device comprises:

The change in voltage detecting module, this change in voltage detecting module inputs to the variable quantity of its input voltage with detecting, and the variable quantity reference signal is outputed to the residual quantity detection module;

The residual quantity detection module, this residual quantity detection module will relatively come from this variable quantity reference signal of this change in voltage detecting module and the residual quantity of a reference power supply voltage; According to this residual quantity, this residual quantity detection module will be exported the residual quantity reference signal to the brightness control signal generator; And

The brightness control signal generator, this brightness control signal generator will be according to this residual quantity reference signal of coming from this residual quantity detection module, and produce brightness control signal, and the led driver that this brightness control signal is sent to this dimming drive device outside is to allow this led driver can carry out the lamplight brightness adjustment of LED lamp.

Described change in voltage detecting module is by detecting power supply " voltage effective value variations ", " conducting phase angle angle ", or " ON time " and finish variable quantity and detect.

Described change in voltage detecting module comprises the circuit that is made of R/L/C/ Zener diode/transistor.

Described change in voltage detecting module comprises analog digital modulus of conversion number conversion IC chip.

Described change in voltage detecting module comprises a rectification circuit, and this change in voltage detecting module and this rectification circuit are made of diode, resistance, electric capacity, PMOS, NMOS.

The utilization of described change in voltage detecting module has different characteristics through rectification alternating voltage waveform, conducting phase angle difference, direct current composition later, and finishes the detecting of power supply voltage variation.

Described change in voltage detecting module utilizes different conducting phase angles to produce mean value change characteristic, takes out its voltage variety.

The present invention further provides a kind of dimming drive device, be applied in the LED lamp lighting environment, this dimming drive device comprises:

The change in voltage detecting module, this change in voltage detecting module is the variation in voltage circuit for detecting; After the input voltage that this change in voltage detecting module will input to it processes, as the variable quantity reference signal; And

Compound circuit is in this compound circuit, with this variable quantity reference signal relatively and residual quantity from a reference power supply voltage; According to this residual quantity, transfer the residual quantity reference signal to brightness control signal, and this brightness control signal is outputed to led driver.

Dimming drive device of the present invention and method comprise following advantage:

1. under the situation that need not change existing distribution, existing light fixture or device, utilize dimming drive device of the present invention and method, make led driver have dimming function, and then allow the LED light fixture that dimming function is arranged.

2. when the input voltage of led driver changes, still make led driver can stablize output and driving LED, make the LED lamp have dimming function, and provide light modulation to select and can select suitable brightness, reach the purpose of power saving environmental protection.

3. the reason input voltage is unstable and glimmer to make the LED brightness stability, and efficient height, the change of LED colour temperature are low.

Description of drawings

Fig. 1 is a device schematic diagram, in order to dimming drive device in the explicit declaration embodiment of the invention, cooperates the operation situation of supply unit, led driver and LED lamp;

Fig. 2 is a flow chart, utilizes dimming drive device of the present invention to carry out the process step of light modulation driving method in order to explicit declaration;

Fig. 3 is a schematic diagram, in order to the framework of dimming drive device in the explicit declaration embodiment of the invention;

Fig. 4 is a flow chart, in order to explicit declaration utilization dimming drive device as shown in Figure 3 to carry out the process step of light modulation driving method;

Fig. 5 is a schematic diagram, cooperates the operation situation of supply unit and led driver in the dimming drive device shown in Fig. 3 in order to explicit declaration;

Fig. 6 is a circuit diagram, in order to explicit declaration, is exchanging the light modulation of the silicon keyholed back plate TRIAC section of nothing, uses the circuit structure of dimming drive device as shown in Figure 3

Fig. 7 is a schematic diagram, when being full conducting in order to the variable quantity reference signal shown in explicit declaration Fig. 6, and each Vcc, Va, Vb, Vc, the situation of Vref voltage;

Fig. 8 is a schematic diagram, when being 90 ° of conductings in order to the variable quantity reference signal shown in explicit declaration Fig. 6, and each Vcc, Va, Vb, Vc, the situation of Vref voltage;

Fig. 9 is a circuit diagram, in order to the change in voltage detecting module shown in explicit declaration Fig. 6 and the operation situation of rectification circuit;

Figure 10 is a figure hoist pennants, in order to the correlation of the conducting phase angle shown in explicit declaration Fig. 9, Vin mean value, direct current DC sin-wave waveform and Vref; And

Figure 11 is a schematic diagram, in order to the framework of the dimming drive device in explicit declaration another embodiment of the present invention.

Embodiment

Fig. 1 is a device schematic diagram, in order to explicit declaration dimming drive device of the present invention, cooperates the operation situation of supply unit, led driver and LED lamp.As shown in fig. 1, dimming drive device 1 will cooperate its outside supply unit 5 and led driver 6 to come operate together, to allow led driver 6 driving LED lamp 7 stably, wherein, 6 of led drivers comprise control module 61 and brilliance control module 62.

After supply voltage Vin inputs to supply unit 5, supply unit 5 will carry out the rectifying and wave-filtering voltage stabilizing to the voltage Vin of this input to produce the stable power voltage vcc, voltage vcc done output and provide to dimming drive device 1, with allow dimming drive device 1 with voltage vcc as benchmark and can carry out follow-up quotient of difference.

The brilliance control module 62 of led driver 6 is the brightness adjusting module, and pulse width modulation PWM (Duty size) or direct current DC (voltage height) signal are sent to brilliance control module 62, can adjust the brightness size; The control module 61 of led driver 6 reaches LED lamp 7 with voltage Vout, enables driving LED lamp 7 stably.

Dimming drive device 1 receives the voltage vcc that comes from supply unit 5, and detecting inputs to the variable quantity of its input voltage vin; Then, dimming drive device 1 produces brightness control signal 41 accordingly, and brightness control signal 41 is sent to led driver 6, to allow led driver 6 can carry out the lamplight brightness adjustment of LED lamp 7.

This dimming drive device 1 will be exported brightness control signal 41 to led driver 6, make led driver 6 have dimming function, and then allow LED lamp 7 that dimming function is arranged.When dimming drive device 1 changes in the input voltage vin of led driver 6, still make led driver 6 can stablize output and the LED of driving LED lamp 7 (not shown go out), and the reason input voltage is unstable and glimmer to make the LED brightness stability, and efficient height, LED colour temperature change low, allow LED lamp 7 except keeping original illumination functions, since the dimming function that led driver 6 is had, and can additionally increase the dimming function of adjusting lamplight brightness.

Fig. 2 is a flow chart, utilizes dimming drive device of the present invention to carry out the process step of light modulation driving method in order to explicit declaration.At first, in step 101, dimming drive device 1 receives the voltage vcc that comes from supply unit 5, and detects the variable quantity of the input voltage vin that inputs to it, and enters step 102.

In step 102, dimming drive device 1 is according to input voltage vin and power source voltage Vcc, and produce brightness control signal 41 accordingly, and brightness control signal 41 is sent to led driver 6, to allow led driver 6 can carry out the lamplight brightness adjustment of LED lamp 7.

Fig. 3 is a schematic diagram, in order to explicit declaration dimming drive device framework of the present invention.As shown in Figure 3, in dimming drive device 1 of the present invention, this dimming drive device 1 comprises change in voltage detecting module 2, residual quantity detection module 3 and brightness control signal generator 4.

Change in voltage detecting module 2 inputs to the variable quantity of its input voltage vin with detecting, and variable quantity reference signal Vref21 is outputed to residual quantity detection module 3.When the input voltage of change in voltage detecting module 2 is AC power supplies, will be by detecting AC power supplies " voltage effective value variations ", " conducting phase angle angle ", or " ON time " and reach the purpose of detecting variable quantity.When the input voltage of change in voltage detecting module 2 is the DC power supply, only need detect the purpose that DC power supply dc voltage value can reach the detecting variable quantity.

Residual quantity detection module 3 will relatively come from the variable quantity reference signal Vref21 and the residual quantity that comes from the voltage vcc that comes from supply unit 5 (not shown) of dimming drive device 1 outside of change in voltage detecting module 2; Residual quantity detection module 3 exports residual quantity reference signal Delta31 to brightness control signal generator 4.

Brightness control signal generator 4 will be according to the residual quantity reference signal Delta31 that comes from residual quantity detection module 3, and produce brightness control signal 41, and brightness control signal 41 is sent to led driver 6 (not shown) of dimming drive device 1 outside, to allow the led driver 6 of dimming drive device 1 outside can carry out the 7 (not shown) lamplight brightness adjustment of LED lamp.

Fig. 4 is a flow chart, in order to explicit declaration utilization dimming drive device as shown in Figure 3 to carry out the process step of light modulation driving method.As shown in Figure 4, at first, in step 111, change in voltage detecting module 2 inputs to the variable quantity of its input voltage vin with detecting, and variable quantity reference signal Vref21 is outputed to residual quantity detection module 2, and enters step 112.

In step 112, residual quantity detection module 3 will relatively come from the residual quantity of variable quantity reference signal Vref 21 with the voltage vcc of the supply unit 5 that comes from dimming drive device 1 outside of change in voltage detecting module 2, and will represent the residual quantity reference signal Delta 31 of residual quantity to export brightness control signal generator 4 to, and enter step 113.

In step 113, brightness control signal generator 4 will be according to the residual quantity reference signal Delta 31 that is come by residual quantity detection module 3, and produce brightness control signal 41, and brightness control signal 41 is sent to the led driver 6 of dimming drive device 1 outside, to allow the led driver 6 of dimming drive device 1 outside can carry out the lamplight brightness adjustment of LED lamp 7.

Fig. 5 is a schematic diagram, cooperates the operation situation of supply unit and led driver in order to the dimming drive device of explicit declaration in Fig. 3.As shown in Figure 5, dimming drive device 1 will cooperate its outside supply unit 5 and led driver 6 to come operate together, to allow led driver 6 driving LED lamp 7 stably.

As shown in Figure 5, dimming drive device 1 comprises change in voltage detecting module 2, residual quantity detection module 3 and brightness control signal generator 4; Led driver 6 then comprises control module 61 and brilliance control module 62.

With input supply voltage Vin to supply unit 5, supply unit 5 will carry out the rectifying and wave-filtering voltage stabilizing to the voltage Vin of this input to produce the stable power voltage vcc, voltage vcc done output and provide to dimming drive device 1, with allow dimming drive device 1 with voltage vcc as benchmark and can carry out follow-up quotient of difference.

The method of the general adjustment brightness of using always is: 1. pulse width modulation PWM (Pulse WidthModulation) light modulation; 2. linear DC DC light modulation.The brilliance control module 62 of led driver 6 is the brightness adjusting module, and pulse width modulation PWM (Duty size) or direct current DC (voltage height) signal are sent to brilliance control module 62, can adjust the brightness size.Dimming mode is for to connect control line in addition by LED lamp outside, and therefore, the LED lamp must have three (containing) above contact (2 power line+1 brightness control signal lines) at least, just can reach the demand of light modulation.The control module 61 of led driver 6 reaches LED lamp 7 with voltage Vout, enables driving LED lamp 7 stably.

Change in voltage detecting module 2 inputs to the variable quantity of its input voltage vin with detecting, and variable quantity reference signal Vref21 is outputed to residual quantity detection module 3.Change in voltage detecting module 2 will be by detecting power supply " voltage effective value variations " ", " conducting phase angle angle " ", or " ON time " " and reach the purpose of detecting variable quantity.At this, the function of this change in voltage detecting module 2 can be by circuit, for example, finish in the loop that R/L/C/Zener Diode/Transistor etc. is constituted, perhaps, with the IC chip circuit, for example, analog digital conversion ADC (Analog to Digital) IC chip adds that external circuit is finished.

Residual quantity detection module 3 will relatively come from the variable quantity reference signal Vref 21 and the residual quantity that comes from the voltage vcc of supply unit 3 of change in voltage detecting module 2; Residual quantity detection module 3 exports residual quantity reference signal Delta 31 to brightness control signal generator 4.

Brightness control signal generator 4 will be according to the residual quantity reference signal Delta 31 that comes from residual quantity detection module 3, and produce brightness control signal 41, and brightness control signal 41 is sent to led driver 6, to allow led driver 6 can carry out the lamplight brightness adjustment of LED lamp 7.

Fig. 6 is a circuit diagram, in order to explicit declaration, in exchanging the light modulation of the silicon keyholed back plate TRIAC section of nothing, uses the circuit structure as the dimming drive device among Fig. 3.At this, this dimming drive device 1 is applied to exchange the silicon keyholed back plate TRIAC section of nothing light modulation (change and exchange AC power supplies conducting phase angle " θ "), to reach the purpose of positive light modulation, wherein, so-called positive light modulation is that the low more then brightness of voltage is low more, otherwise negative light modulation then is opposite situation.Supply unit 5 through the rectifying and wave-filtering voltage stabilizing, and draws the output voltage V cc that it is exported with the input voltage vin of being imported, and at this, for example, input voltage vin is AC110V and voltage vcc is DC5V.Can be with residual quantity | Vref-Vcc| is designed to, 0≤| Vref-Vcc|≤5V (DC), that is, the maximum of residual quantity is DC5V, and its minimum value is 0V, at this, Vref is variable quantity reference signal Vref 21.

When the external input voltage Vin of dimming drive device 1 is the full conducting of AC110V (0 ° in phase angle), | the Vref-Vcc| residual quantity is maximum, promptly, residual quantity is DC5V, therefore, residual quantity reference signal 31 (Delta) is output as maximum DC5V, and brightness control signal generator 4 is sent brightness control signal 41 according to residual quantity reference signal 31 (Delta) state, and brightness control signal 41 is at brightness highest signal state.

When the external input voltage Vin of dimming drive device 1 conducting phase angle during greater than 0 °, the effective value of Vin will descend this moment, thereby making | the Vref-Vcc| residual quantity is dwindled, therefore, residual quantity reference signal 31 (Delta) output will be dwindled, brightness control signal generator 4 is sent brightness control signal 41 to led driver 6 according to residual quantity reference signal 31 (Delta) state, and led driver 6 will make the brightness of LED lamp 7 reduce.

As shown in Figure 6, wherein, change in voltage detecting module 2 comprises a rectification circuit 201, change in voltage detecting module 2 is made of electronic building bricks such as diode, resistance, electric capacity, PMOS, NMOS with rectification circuit 201, utilization has different characteristics through rectification AC sin-wave waveform, conducting phase angle difference, direct current DC composition later, and reaches the purpose of detecting power supply voltage variation.

At this, input voltage vin is the AC110V power supply sin-wave waveform of standard; Va is direct current (DC) the sin-wave waveform after the rectification; Vb is through the R1/R2 dividing potential drop, suitable low-voltage direct (DC) the sin-wave waveform voltage of being taken out; R3, R4, C3, Q1 will close (Turn-Off) Q2 when the conducting phase angle is more than 105 °, after running is illustrated in; After the direct current composition filtering of C1, will take out and exchange the Vc signal Vb; Vc does filtering by C2 again and takes out crest voltage Vref after D2 is with the negative half-cycle filtering, and Vref is direct voltage and is variable quantity reference signal 21.

As shown in Fig. 7 and Fig. 8, in the 7th figure, variable quantity reference signal 21 is Vref (1), and Vref (1) is full conducting; In Fig. 8, variable quantity reference signal 21 is Vref (2), and Vref (2) is 90 ° of conductings, wherein, Vref (1)<Vref (2), on behalf of input voltage, different variable quantity reference signal 21Vref values change.

Fig. 7 is a schematic diagram, when being full conducting in order to the variable quantity reference signal 21 of explicit declaration in Fig. 6, and each Vcc, Va, Vb, Vc, the situation of Vref voltage.As shown in Figure 7, the tunable optical phase angle is 0 ° to 105 °, and the Vpeak of Vcc is 155V, and the Vpeak of Va is 5V, and wherein, Vc voltage is the voltage after C1 filtering gives filtering with the direct current composition; Vref (1) is for after D2 gives filtering with the negative half-wave of Vc, does filtering by C2 again and the crest voltage (Vref) that takes out.

Fig. 8 is a schematic diagram, when being 90 ° of conductings in order to the variable quantity reference signal 21 of explicit declaration in Fig. 6, and each Vcc, Va, Vb, Vc, the situation of Vref voltage.As shown in Figure 8, the conducting phase angle is 90 °, and the Vpeak of Vcc is 155V, and the Vpeak of Va is 5V, and wherein, Vc voltage is the voltage after C1 filtering gives filtering with the direct current composition; Partly during the phase angle conducting, Vref (2) is for after D2 gives filtering with the negative half-wave of Vc, does filtering by C2 again and the crest voltage (Vref) that takes out.

Fig. 9 is a circuit diagram, in order to explicit declaration in Fig. 6 the change in voltage detecting module and the operation situation of rectification circuit.The change in voltage checking circuit principle of change in voltage detecting module 2, when being applied to the input of AC 110V/220V power supply, its variable quantity reference signal Vref21 is during in conducting phase angle theta<108 °, Vref becomes big along with the conducting phase angle theta and raises, promptly under 2<108 ° of conditions of θ 1<θ, Vref (θ 1)<Vref (θ 2); But during in θ>108 °, Vref begins to descend on the contrary, therefore, must limit tunable optical phase angular region, it is designed to 0 ° to 105 °, promptly, for complete bright to the darkest, preventing malfunction, and tunable optical phase angular region is 0 ° to the 105 ° application that can satisfy existing most TRIAC light modulation product, because the conducting phase place of existing TRIAC is mostly in ° interval, 0 °≤θ<90.Variable quantity reference signal Vref21 change in voltage can be learnt by AC power supplies mean value.

Figure 10 is a figure hoist pennants, in order to the correlation of conducting phase angle, Vin mean value, direct current DC sin-wave waveform and the Vref of explicit declaration in Fig. 9.As shown in Fig. 9 and Figure 10, Vref (DC direct voltage) can obtain peak value (Peak) voltage of Vdc cancel after C2 filtering.

Figure 11 is a schematic diagram, in order to the framework of another embodiment of explicit declaration dimming drive device of the present invention.As shown in Figure 11, in another embodiment of dimming drive device 1 of the present invention, the compound circuit 34 that this dimming drive device 1 comprises change in voltage detecting module 2 and is made up of residual quantity detection module 3 and brightness control signal generator 4.

Change in voltage detecting module 2 utilizes resistance R 1, R2 to give dividing potential drop for direct current dc voltage change circuit for detecting, if aft-end assembly is withstand voltage enough, can directly connect input voltage vin as variable quantity reference signal Vref 21.

Compound circuit 34 is made up of residual quantity detection module 3 and brightness control signal generator 4, in compound circuit 34, will compare the residual quantity (Delta) of variable quantity reference signal Vref21 and Vcc; Utilize LM393 to transfer residual quantity reference signal 31 (residual quantity) to brightness control signal 41 (PMW control signal) again, and brightness control signal 41 transmission are outputed to led driver 6, to reach the light modulation purpose.In this compound circuit 34, for example, can produce the pwm signal (brightness control signal 41) of a 1KHz, reach the purpose of light modulation by the size of adjusting Duty.Yet, when being direct current DC, can add filter circuit in dimming drive device 1 and 6 of led drivers as if led driver 6 required brightness control signals 41, make brightness control signal 41 filters are direct current DC signal.

The embodiment of above-described dimming drive device of the present invention can be applicable to LED lamp lighting environment: 1. the section of nothing desk lamp with dimmer switch, for example, desk lamp, hotel bedside lamp, decorative lamp or the like; 2. commodity displaying illumination, for example, projecting lamp, and: 3. general lighting such as commercialization and family expenses.And the light modulation of so-called nothing section is the light and shade power that can freely control light, and dimming scope is served as reasons, for example, and 0% to 100% or 10% to 100%.In above described embodiment, though described effective value for the adjustment supply voltage that is applied to exchange silicon keyholed back plate TRIAC or SCR, variable resistor dividing potential drop, to reach the dimming function purpose, yet, dimming drive device of the present invention can be applicable to that other is identical, similarly adjusts the situation of the effective value of supply voltage, its reason is same as above-mentioned described, therefore, does not repeat them here.

Comprehensive above embodiment, we can obtain a kind of dimming drive device of the present invention and method, be applied in the LED lamp lighting environment, under the situation that need not change existing distribution, existing light fixture or device, utilize dimming drive device of the present invention and method, make led driver have dimming function, and then allow the LED lamp that dimming function is arranged.Dimming drive device of the present invention and method, when the input voltage of led driver changes, still make led driver can stablize output and driving LED, and the reason input voltage is unstable and glimmer to make the LED brightness stability, and efficient height, LED colour temperature change low, allow the LED lamp except keeping original illumination functions, because the dimming function that led driver had, and can additionally increase the dimming function of adjusting lamplight brightness.

The above is preferred embodiment of the present invention only, is not in order to limit scope of the present invention.All other do not break away from the equivalence of being finished under the disclosed spirit and changes or modification, all should be included in the following claim.

Claims (11)

1. light modulation driving method is applied to it is characterized in that in the LED lamp lighting environment that this light modulation driving method comprises following program:
Dimming drive device receives the voltage that comes from supply unit, and detecting inputs to the variable quantity of the input voltage of this dimming drive device; And
This dimming drive device is according to this voltage and this input voltage that come from this supply unit, and produce brightness control signal accordingly, and brightness control signal is sent to led driver, to allow led driver can carry out the lamplight brightness adjustment of LED lamp.
2. light modulation driving method is applied to it is characterized in that in the LED lamp lighting environment that this light modulation driving method comprises following program:
The change in voltage detecting module inputs to the variable quantity of its input voltage with detecting, and the variable quantity reference signal is outputed to the residual quantity detection module;
This residual quantity detection module will relatively come from this variable quantity reference signal of this change in voltage detecting module and the residual quantity of the voltage that comes from outside supply unit, and will represent the residual quantity reference signal of this residual quantity to export the brightness control signal generator to; And
This brightness control signal generator will produce brightness control signal according to this residual quantity reference signal of coming from this residual quantity detection module, and this brightness control signal is sent to outside led driver, to allow this led driver can carry out the lamplight brightness adjustment of LED lamp.
3. dimming drive device is applied to it is characterized in that this dimming drive device comprises in the LED lamp lighting environment:
The change in voltage detecting module, this change in voltage detecting module inputs to the variable quantity of its input voltage with detecting, and the variable quantity reference signal is outputed to the residual quantity detection module;
The residual quantity detection module, this residual quantity detection module will relatively come from this variable quantity reference signal of this change in voltage detecting module and the residual quantity of a reference power supply voltage; According to this residual quantity, this residual quantity detection module will be exported the residual quantity reference signal to the brightness control signal generator; And
The brightness control signal generator, this brightness control signal generator will be according to this residual quantity reference signal of coming from this residual quantity detection module, and produce brightness control signal, and the led driver that this brightness control signal is sent to this dimming drive device outside is to allow this led driver can carry out the lamplight brightness adjustment of LED lamp.
4. dimming drive device as claimed in claim 3 is characterized in that, described change in voltage detecting module is by detecting power supply " voltage effective value variation " ", " conducting phase angle angle ", or " ON time " " and finish the variable quantity detecting.
5. as claim 3 or 4 described dimming drive devices, it is characterized in that described change in voltage detecting module comprises the circuit that is made of R/L/C/ Zener diode/transistor.
6. as claim 3 or 4 described dimming drive devices, it is characterized in that described change in voltage detecting module comprises analog digital modulus of conversion number conversion IC chip.
7. as claim 3 or 4 described dimming drive devices, it is characterized in that described change in voltage detecting module comprises a rectification circuit, this change in voltage detecting module and this rectification circuit are made of diode, resistance, electric capacity, PMOS, NMOS electronic building brick.
8. dimming drive device as claimed in claim 7 is characterized in that, the utilization of described change in voltage detecting module has different characteristics through rectification alternating voltage waveform, conducting phase angle difference, direct current composition later, and finishes the detecting of power supply voltage variation.
9. as claim 3 or 4 described dimming drive devices, it is characterized in that described change in voltage detecting module utilizes different conducting phase angles to produce mean value change characteristic, takes out its voltage variety.
10. dimming drive device as claimed in claim 5 is characterized in that, described change in voltage detecting module utilizes different conducting phase angles to produce mean value change characteristic, takes out its voltage variety.
11. a dimming drive device is applied to it is characterized in that this dimming drive device comprises in the LED lamp lighting environment:
The change in voltage detecting module, this change in voltage detecting module is the variation in voltage circuit for detecting; After the input voltage that this change in voltage detecting module will input to it processes, as the variable quantity reference signal; And
Compound circuit is in this compound circuit, with this variable quantity reference signal relatively and residual quantity from a reference power supply voltage; According to this residual quantity, transfer the residual quantity reference signal to brightness control signal, and this brightness control signal is outputed to led driver.
CN200810135922A 2008-07-03 2008-07-03 Light-adjusting driving device and method CN101621879A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
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CN102281663A (en) * 2010-06-08 2011-12-14 群光电能科技股份有限公司 LED dimming control device with colour temperature stabilization function
CN102340904A (en) * 2010-07-14 2012-02-01 通用电气公司 Light-emitting diode driving device and driving method thereof
CN103034027A (en) * 2011-09-30 2013-04-10 中强光电股份有限公司 Projector and light source thereof control method
CN103139992A (en) * 2013-02-26 2013-06-05 上海大学 Light-emitting diode (LED) dimming driving system with silicon controlled bypass dimming circuit
TWI452937B (en) * 2012-06-25 2014-09-11 Richtek Technology Corp Led control device for phase cut dimming system and control method thereof
CN104115556A (en) * 2012-01-20 2014-10-22 奥斯兰姆施尔凡尼亚公司 Secondary side phase-cut dimming angle detection
CN104582141A (en) * 2014-12-12 2015-04-29 骆武宁 Centralized dimming control method of lighting system

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102281663A (en) * 2010-06-08 2011-12-14 群光电能科技股份有限公司 LED dimming control device with colour temperature stabilization function
CN102340904A (en) * 2010-07-14 2012-02-01 通用电气公司 Light-emitting diode driving device and driving method thereof
US9516723B2 (en) 2010-07-14 2016-12-06 General Electric Company System and method for driving light emitting diodes
CN102340904B (en) * 2010-07-14 2015-06-17 通用电气公司 Light-emitting diode driving device and driving method thereof
CN103034027A (en) * 2011-09-30 2013-04-10 中强光电股份有限公司 Projector and light source thereof control method
US9268205B2 (en) 2011-09-30 2016-02-23 Coretronic Corporation Projector and method of adjusting luminance based on detected voltage
CN104115556B (en) * 2012-01-20 2016-09-21 奥斯兰姆施尔凡尼亚公司 Primary side phase-cut dimming angle is detected
CN104115556A (en) * 2012-01-20 2014-10-22 奥斯兰姆施尔凡尼亚公司 Secondary side phase-cut dimming angle detection
TWI452937B (en) * 2012-06-25 2014-09-11 Richtek Technology Corp Led control device for phase cut dimming system and control method thereof
CN103139992B (en) * 2013-02-26 2015-08-12 上海大学 With the LED dimming drive system of controllable silicon bypass light adjusting circuit
CN103139992A (en) * 2013-02-26 2013-06-05 上海大学 Light-emitting diode (LED) dimming driving system with silicon controlled bypass dimming circuit
CN104582141A (en) * 2014-12-12 2015-04-29 骆武宁 Centralized dimming control method of lighting system
CN104582141B (en) * 2014-12-12 2017-11-03 骆武宁 The concentration dimming controlling method of illuminator

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