CN105657932A - Light source drive circuit and brightness and color temperature controller - Google Patents
Light source drive circuit and brightness and color temperature controller Download PDFInfo
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Abstract
The invention discloses a light source drive circuit and a brightness and color temperature controller. The light source drive circuit is used to adjust the brightness and color temperature of a light source, and comprises a power converter and the brightness and color temperature controller coupled to the power converter. The power converter is connected between a power source and the light source, and used to receive electric energy from the power source and provides the adjusted electric energy to the light source. The brightness and color temperature controller is used to receive a conduction detection signal which is used to indicate the conduction state of a three-end silicon-controlled light modulator connected between the power supply and the power converter, and adjust the brightness of the light source based on the conduction detection signal. The brightness and color temperature controller is also used to receive a switch monitoring signal which is used to indicate ON/OFF operation of a switch connected to the three-end silicon-controlled light modulator, and adjust the color temperature of the light source based on the switch monitoring signal. The power switch is operated to adjust the brightness and color temperature of the light source simultaneously, no extra special device is needed, operation is simple and convenient, and the cost is reduced.
Description
Technical field
The present invention relates to light source field, particularly relate to a kind of light source driving circuit and brightness and color-temperature controller.
Background technology
In recent years, the new type light source such as light emitting diode (light-emittingdiode, LED) at material and manufactures and all achieves progress. LED has high efficiency, long-life, the feature such as bright-colored, it is possible to be applied to the fields such as automobile, computer, communication, military affairs and article of everyday use. Such as, LED can substitute traditional electric filament lamp as lighting source.
Light source can be regulated in different ways. Such as, electric power converter receives the alternating voltage that alternating current power supply provides, and to produce DC voltage be that LED light source is powered. Controller adjusts the output of electric power converter according to the dimmer being coupling between alternating current power supply and electric power converter, thus adjusting the brightness of LED light source. This dimmer can be triode-thyristor (TRIAC) dimmer or ON/OFF (ON/OFF) dimmer. But, this dimmer is all only used for the colour temperature regulating light-source brightness and cannot adjusting light source.
Summary of the invention
The technical problem to be solved in the present invention is in that to provide a kind of light source driving circuit and brightness and color-temperature controller, it is possible to realize the adjustment to light-source brightness and colour temperature in the way of simple and convenient.
For solving above-mentioned technical problem, the invention provides a kind of light source driving circuit, for regulating brightness and the colour temperature of light source. Light source driving circuit includes: electric power converter, is coupling between power supply and described light source, for receiving electric energy from described power supply and providing the electric energy after regulating to described light source; And brightness and color-temperature controller, it is coupled in described electric power converter, for receiving the conduction detection signal of the conducting state of the TRIAC dimmer that instruction is coupled between described power supply and described electric power converter, and the brightness of described light source is adjusted based on described conduction detection signal, wherein said brightness and color-temperature controller are additionally operable to receive the switch monitors signal of the operation indicating the on/off (ON/OFF) being coupled in described TRIAC dimmer to switch, and adjust the colour temperature of described light source based on described switch monitors signal.
Present invention also offers a kind of brightness and color-temperature controller, described brightness and color-temperature controller include: signal generator, for producing the monitor signal proportional to the average current flowing through light source; TRIAC monitor, for receiving the conduction detection signal of the conducting state of the TRIAC dimmer that instruction is coupled between power supply and electric power converter and producing to indicate the reference signal of the desired value of the average current flowing through described light source according to described conduction detection signal; Driver, is coupled in described signal generator and described TRIAC monitor, for producing to drive signal to provide the electric energy after regulating to described light source to control described electric power converter according to described monitor signal and described reference signal; And colour temperature control unit, for receiving the switch monitors signal of the operation indicating the ON/OFF switch being coupled in described TRIAC dimmer, and adjust the colour temperature of described light source based on described switch monitors signal.
Compared with prior art, the light source driving circuit of the present invention and brightness and color-temperature controller can pass through on and off switch (such as, including ON/OFF switch and TRIAC dimmer) operation realize the adjustment to light-source brightness and colour temperature simultaneously, without using extra dedicated devices, simple and convenient and provide cost savings.
Accompanying drawing explanation
Below by way of to the some embodiments of the present invention description in conjunction with its accompanying drawing, it is possible to be further appreciated by the purpose of the present invention, specific structural features and advantage.
Figure 1A show the block diagram of light source driving circuit according to embodiments of the present invention;
Figure 1B show the block diagram of the light source driving circuit comprising ON/OFF switch and TRIAC dimmer according to embodiments of the present invention;
The signal waveforms that Fig. 1 C show in Figure 1B TRIAC dimmer and generates or receive;
The schematic diagram of one embodiment of the on and off switch that Fig. 2 show in Figure 1A and Figure 1B;
Fig. 3 show the circuit diagram of light source driving circuit according to embodiments of the present invention;
Fig. 4 show the structural representation of the brightness in Fig. 3 and color-temperature controller;
The structural representation of the TRIAC monitor that Fig. 5 show in Fig. 4;
The structural representation of the color temperature control module that Fig. 6 show in Fig. 4;
Fig. 7 show the signal waveforms of the light source driving circuit comprising the color temperature control module shown in Fig. 6 according to embodiments of the present invention;
Fig. 8 show the signal waveforms of the light source driving circuit comprising the color temperature control module shown in Fig. 6 according to another embodiment of the present invention; And
Fig. 9 show the method flow diagram controlling light-source brightness and colour temperature according to embodiments of the present invention.
Detailed description of the invention
Embodiments of the invention will be provided detailed reference below. Although the present invention is illustrated by these embodiments and is illustrated, but it should be noted that the present invention is not merely confined to these embodiments. On the contrary, the present invention contains all substitutes in the defined spirit of claims and invention scope, variant and equivalent.
It addition, in order to better illustrate the present invention, detailed description of the invention below gives numerous details. It will be understood by those skilled in the art that there is no these details, the equally possible enforcement of the present invention. In other example, known method, formality, element and circuit are not described in detail, in order to highlight the purport of the present invention.
Figure 1A show the block diagram of light source driving circuit 100 according to embodiments of the present invention.In one embodiment, light source comprises the first light-emitting component (such as, a LED chain 120) and the second light-emitting component (such as, the 2nd LED chain 130). 2nd LED chain 130 can have the color temperature value different from a LED chain 120, for instance, a LED chain 120 has the first color temperature value, and the 2nd LED chain 130 has the second color temperature value. It is coupling in power supply VINAnd the on and off switch 101 between light source driving circuit 100 comprises ON/OFF and switchs 102 (such as, rocker switch) and TRIAC dimmers 104, by power supply VINIt is selectively coupled to light source driving circuit 100. Although it should be noted that in figure ia ON/OFF switch 102 be coupling in TRIAC dimmer 104 before, but this and nonrestrictive. Such as, as it is shown on figure 3, ON/OFF switch 102 can be coupling in TRIAC dimmer 104 after. In one embodiment, on and off switch 101 can be placed in the on and off switch on metope. As in figure 2 it is shown, this on and off switch 101 is divided into the TRIAC dimmer 104 of the first half and the ON/OFF switch 102 of the latter half. In operation, ON end or OFF end is switched to by ON/OFF is switched 102, the conduction state of on and off switch 101 can be controlled to be Guan Bi or disconnection by user, and adjust the colour temperature of light source by ON/OFF switchs the operation (such as, opening operation) of 102. Meanwhile, user is also by the brightness that the operation (such as, knob-operated) of TRIAC dimmer 104 adjusts light source.
AC-input voltage V from power supplyINAlternating voltage V is converted to via ON/OFF switch 102 and TRIAC dimmer 104TRIAC. Light source driving circuit 100 includes for by alternating voltage VTRIACConvert commutating voltage V toRECCommutator 106, the electric power converter 108 being coupling between commutator 106 and light source (such as, LED chain 120 and a 2nd LED chain 130), brightness and color-temperature controller 112, first control switch 122 and second and control switch 132. Electric power converter 108 is for receiving commutating voltage V from commutator 106RECAnd provide the output electric current I after regulating to light source (such as, LED chain 120 and a 2nd LED chain 130)OUT. Electric power converter 108 includes the transformator 110 with primary side winding and vice-side winding.
Brightness and color-temperature controller 112 are coupling in the primary side winding of transformator 110 with light source (such as, oneth LED chain 120 and the 2nd LED chain 130) between, for receive instruction ON/OFF switch 102 operation (such as, opening operation) switch monitors signal TS, and the colour temperature of light source (such as, LED chain 120 and a 2nd LED chain 130) is adjusted based on switch monitors signal TS. As shown in Figure 1A, brightness and color-temperature controller 112 produce the first control signal CTR1 and the second control signal CTR2 according to switch monitors signal TS and control LED chain 120 and a 2nd LED chain 130 respectively.
First control signal CTR1 selectivelyes switch on be coupling between brightness and color-temperature controller 112 and a LED chain 120 first and controls switch 122, so that the colour temperature of light source is adjusted to the first color temperature value. Second control signal CTR2 selectivelyes switch on be coupling between brightness and color-temperature controller 112 and the 2nd LED chain 130 second and controls switch 132, so that the colour temperature of light source is adjusted to the second color temperature value. More specifically, if the first control signal CTR1 connects be coupling between brightness and color-temperature controller 112 and a LED chain 120 first controls switch 122, then electric current ILED1The colour temperature flowing through a LED chain 120 and light source is adjusted to the first color temperature value;If the second control signal CTR2 connects be coupling between brightness and color-temperature controller 112 and the 2nd LED chain 130 second controls switch 132, then electric current ILED2The colour temperature flowing through the 2nd LED chain 130 and light source is adjusted to the second color temperature value.
In addition, brightness and color-temperature controller 112 be additionally operable to receive instruction TRIAC dimmer 104 conducting state (such as, angle of flow between 0-180 degree) conduction detection signal TD, and adjust brightness (such as, the electric current I of light source based on conduction detection signal TDLED1Or electric current ILED2Value). Specifically, understanding the operation of this adjustment brightness in combinations with Figure 1B and Fig. 1 C, Figure 1B show the block diagram of the light source driving circuit 100 comprising ON/OFF switch 102 and TRIAC dimmer 104 according to embodiments of the present invention. As shown in Figure 1B, TRIAC dimmer 104 includes being coupling in the TRIAC device 202 between ON/OFF switch 102 and commutator 106. TRIAC device 202 has port A1, port A2 and grid G. TRIAC dimmer 104 also includes variable resistance 204 and the electric capacity 206 of series coupled and two ends exchange (DiodeforAlternatingCurrent, DIAC) device 208. One end of DIAC device 208 coupled to electric capacity 206, and the other end coupled to the grid G of TRIAC device 202. TRIAC device 202 is two-way switch, can at either direction On current once be triggered. TRIAC device 202 can be triggered by positive current or the negative current applied to grid G. Once be triggered, TRIAC device 202 (such as, keeps electric current I by dropping to threshold value at the electric current flowing through port A1 and port A2H) be held on before.
Fig. 1 C show the signal waveforms that in Figure 1B according to an embodiment of the invention, TRIAC dimmer 104 generates or receives. Fig. 1 C will be described in conjunction with Figure 1B. Fig. 1 C illustrates AC-input voltage VIN, TRIAC device 202 port A1 and port A2 between voltage VA2-A1, flow through the electric current I of DIAC device 208DIAC, alternating voltage VTRIACWith commutating voltage VRECWaveform.
In the example of Fig. 1 C, AC-input voltage VINThere is sine waveform. At moment T0To moment T1Between, TRIAC device 202 turns off, the voltage V between port A1 and port A2A2-A1Along with AC-input voltage VINIncrease and increase. At moment T1To moment T2Between, TRIAC device 202 is held on. So, at moment T1To moment T2Between, alternating voltage VTRIACWaveform and AC-input voltage VINWaveform consistent.
Close to AC-input voltage VINThe moment T that terminates of the first half period2, electric current owing to flowing through TRIAC device 202 is decreased below the maintenance electric current of TRIAC device 202, and TRIAC device 202 turns off. At AC-input voltage VINThe second half period in, when the voltage on electric capacity 206 is at moment T3During conducting DIAC device 208, TRIAC device 202 turns on again. In like manner, at moment T3To moment T4Between, alternating voltage VTRIACWaveform and AC-input voltage VINWaveform consistent.
In one embodiment, the resistance R of user's adjustable variable resistance 204204, for instance, the knob rotating TRIAC dimmer 104 adjusts the resistance R of variable resistance 204204. The resistance R of variable resistance 204204Determine that TRIAC device 202 is at AC-input voltage VINEach half period in turn-on instant. More specifically, in one embodiment, if variable-resistance resistance R204Increase, at moment T0It is the meansigma methods reduction of the charging current of electric capacity 206 charging afterwards. Therefore, the voltage on electric capacity 206 needs the more time to reach the voltage threshold relevant to DIAC device 208.So, the turn-on instant of TRIAC device 202 is delayed by, for instance, it is later than moment T1. In like manner, if variable-resistance resistance R204Reducing, the turn-on instant of TRIAC device 202 is done sth. in advance, for instance, early than moment T1. Therefore, by adjusting the resistance R of variable resistance 204204, in each half period, the turn-on instant of TRIAC device 202 is adjusted accordingly, for instance, turn-on instant is delayed or early by. TRIAC dimmer 104 can have other structure, and is not limited to the embodiment of Figure 1B and Fig. 1 C. In another embodiment, if the resistance R of variable resistance 204204Change, for instance, resistance R204Being adjusted by a user, in each half period, the shutoff moment of TRIAC device 202 is adjusted. For illustrating, in the following description, TRIAC dimmer 104 adjusts the turn-on instant of TRIAC device 202. But, the invention is not limited in this, the TRIAC dimmer 104 of the present invention applies also for the shutoff moment adjusting TRIAC device 202.
Return to Figure 1A and Figure 1B, the conducting state of brightness and color-temperature controller 112 reception instruction TRIAC device 202 is (such as, angle of flow between 0-180 degree) conduction detection signal TD, and adjust brightness (such as, the electric current I of light source based on conduction detection signal TDLED1Or electric current ILED2Value). Brightness and color-temperature controller 112 produce to drive signal DRV according to conduction detection signal TD. Drive signal DRV to control the control in electric power converter 108 to switch (such as, control switch Q3 in Fig. 3) alternation is in the first state (such as, conducting state) and the second state is (such as, off state), thus adjusting average current (such as, the electric current I flowing through LED light sourceLED1Or electric current ILED2). More specifically, in one embodiment, brightness and color-temperature controller 112 detect the turn-on instant of TRIAC device 202 in each cycle based on conduction detection signal TD. If the resistance R of variable resistance 204204Increasing (such as, by rotating the knob of TRIAC dimmer 104), in each cycle, the turn-on instant of TRIAC device 202 postpones. Thus, brightness and color-temperature controller 112 control switch Q3 and reduce the average current flowing through LED light source (such as, LED chain 120 or a 2nd LED chain 130). In like manner, if the resistance R of variable resistance 204204Reducing, brightness and color-temperature controller 112 control switch Q3 to improve the average current flowing through LED light source (such as, LED chain 120 or a 2nd LED chain 130). Such as, if as described above, connect the first control switch 122 if brightness produces the first control signal CTR1 with color-temperature controller 112 according to switch monitors signal TS and the colour temperature of light source is adjusted to the first color temperature value, then brightness and color-temperature controller 112 adjust the average current I flowing through the first LED light source 120 according to the operation of TRIAC dimmer 104LED1. Connect the second control switch 132 if brightness produces the second control signal CTR2 with color-temperature controller 112 according to switch monitors signal TS and the colour temperature of light source is adjusted to the second color temperature value, then brightness and color-temperature controller 112 adjust the average current I flowing through the second LED light source 130 according to the operation of TRIAC dimmer 104LED2��
Advantageously, the operation that brightness and color-temperature controller 112 are possible not only to according to ON/OFF switch 102 adjusts light source (such as, oneth LED chain 120 and the 2nd LED chain 130) colour temperature, simultaneously operation according to TRIAC dimmer 104 can also adjust LED light source (such as, oneth LED chain 120 and the 2nd LED chain 130) brightness, without using extra dedicated devices, simple and convenient and provide cost savings.The operation of brightness and color-temperature controller 112 will be described further in conjunction with Fig. 3.
Fig. 3 show the circuit diagram of light source driving circuit 300 according to embodiments of the present invention. In figure 3, for brevity, not shown power supply VINWith TRIAC dimmer 104. Light source driving circuit 300 is by power supply VIN(such as, 110/120V exchanges, 60Hz) powers via ON/OFF switch 102 and TRIAC dimmer 104. Alternating voltage VTRIACCommutating voltage V is converted to via wave filter 302 and commutator 106 (bridge rectifier such as, being made up of diode D1-D4)REC. Electric power converter 108 receives commutating voltage V from commutator 106RECAnd provide the output electric current I after regulating to light source (such as, LED chain 120 and a 2nd LED chain 130)OUT��
In the example of fig. 3, electric power converter 108 includes transformator 110, controls switch Q3, diode D5 and electric capacity C8. Transformator 110 includes for receiving commutating voltage V from commutator 106RECPrimary side winding 305, for providing output electric current I to a LED chain 120 and the 2nd LED chain 130OUTVice-side winding 307, magnetic core 311 and for providing the auxiliary winding 309 of voltage to brightness and color-temperature controller 112. Transformator 110 shown in Fig. 3 include the simply citing of three windings and and unrestricted, in other embodiments, transformator 110 can include the winding of other varying number. In the embodiment shown in fig. 3, the switch Q3 that controls being coupled in primary side winding 305 is positioned at brightness and the outside of color-temperature controller 112. In other embodiments, control switch Q3 and can also be integrated in brightness and the inside of color-temperature controller 112.
Brightness and color-temperature controller 112 are coupled in primary side winding 305 and the auxiliary winding 309 of transformator 110. Brightness and color-temperature controller 112 can be flyback pulse width modulation (PWM) controller, the control switch Q3 connected with primary side winding 305 for producing pwm signal to selectively switch on, and the output electric current I of transformator 110 is adjusted by adjusting the dutycycle of pwm signalOUT. Citing but and unrestricted, the port of brightness and color-temperature controller 112 includes port HV, CLK, PWM, VDD, GND, COMP, CS, FB, SW1 and SW2.
Brightness and color-temperature controller 112 receive commutating voltage V at port HV placeINConduction detection signal TD and adjust average current (such as, the electric current I flowing through LED light source according to conduction detection signal TDLED1Or electric current ILED2). Specifically, conduction detection signal TD may indicate that the conducting state (such as, the angle of flow between 0-180 degree) of the TRIAC device 202 in TRIAC dimmer 104. Brightness and color-temperature controller 112 can provide the reference signal REF (describing in detail in figure 4 below and Fig. 5) of the angle of flow corresponding to TRIAC dimmer 104 based on conduction detection signal TD, and produce to drive signal DRV to adjust average current (such as, the electric current I flowing through LED light source at port PWM place according to reference signal REFLED1Or electric current ILED2)��
Advantageously, in response to the rotation process of TRIAC dimmer 104 in primary circuit, light source in secondary circuit is (such as, oneth LED chain 120 and the 2nd LED chain 130) brightness be adjusted to the target brightness value (such as, 25%, 50%, 75%, 90%, 100% etc.) of angle of flow corresponding to TRIAC dimmer 104 by brightness and color-temperature controller 112.
Brightness and color-temperature controller 112 receive the conducting state of instruction ON/OFF switch 102 (such as at port CLK place, be switched on or switched off state) switch monitors signal TS, and produce the first control signal CTR1 (at port SW1 place) and the second control signal CTR2 (at port SW2 place) according to switch monitors signal TS and control LED chain 120 and a 2nd LED chain 130 respectively.More specifically, in one embodiment, if switch monitors signal TS instruction first switches on ON/OFF switch 102, then brightness produce with color-temperature controller 112 first control signal CTR1 connect first control switch 122 and produce the second control signal CTR2 disconnect second control switch 132, therefore, electric current ILED1Flow through a LED chain 120 and flow through the 2nd LED chain 130 without electric current; If switch monitors signal TS indicates ON/OFF switch 102 disconnection and is again switched within a predetermined period of time, then brightness produce with color-temperature controller 112 first control signal CTR1 disconnect first control switch 122 and produce the second control signal CTR2 connect second control switch 132, therefore, electric current is not had to flow through a LED chain 120, electric current ILED2Flow through the 2nd LED chain 130. Because the 2nd LED chain 130 can have the colour temperature different from a LED chain 120, so brightness and color-temperature controller 112 can adjust the colour temperature of light source according to switch monitors signal TS.
Port FB receives instruction from the bleeder circuit (sign) of the auxiliary winding 309 being coupled in transformator 110 and flows through the electric current I of vice-side winding 307SCurrent monitor signal SEN (such as, current monitor signal SEN may indicate that the electric current I flowing through vice-side winding 307SWhen drop to 0). Port CS receives instruction and flows through the electric current I of primary side winding 305PMonitor signal LPSEN. Brightness and color-temperature controller 112 receive current monitor signal SEN and monitor signal LPSEN, and produce at port PWM place to drive signal DRV to control switch Q3 to regulate the output electric current I of electric power converter 108OUT. Brightness and color-temperature controller 112 produce to drive the signal DRV conducting state (such as, being switched on or switched off state) controlling switch Q3 at port PWM place according to current monitor signal SEN and monitor signal LPSEN. Such as, when current monitor signal SEN instruction flows through the electric current I of vice-side winding 307SWhen dropping to 0, drive signal DRV can convert on-state by controlling switch Q3 to from off-state. More specifically, the voltage of current monitor signal SEN can flow through the target current value I of light source with instructionTARGETThe voltage of reference signal compare, the voltage of monitor signal LPSEN can with instruction target current value ITARGETThe voltage of another reference signal compare, if the instruction of arbitrary comparative result flows through the instantaneous current value of light source more than target current value ITARGET, then brightness and color-temperature controller 112 reduce the dutycycle driving signal DRV, and vice versa. In one embodiment, if driving signal DRV is the first state (such as, logic high), then controlling switch Q3 and connect, electric current flows through primary side winding 305, and magnetic core 311 carries out energy storage. If drive signal DRV be the second state (such as, logic low), control switch Q3 to disconnect, and be coupled in the diode D5 forward bias of vice-side winding 307 so that the energy being stored in magnetic core 311 discharges to electric capacity C8 and light source through vice-side winding 307. Therefore, it can according to the electric energy driving signal DRV to adjust light source (such as, LED chain 120 and a 2nd LED chain 130).
Port VDD is coupled in auxiliary winding 309. In one embodiment, it is coupled in the energy-storage units between port VDD and ground (such as, electric capacity C5) and is brightness when ON/OFF switchs 102 disconnection and color-temperature controller 112 is powered. Port COMP is coupled with ground (port GND) by electric capacity, is used for providing error signal.
Advantageously, in response to the opening operation of ON/OFF switch 102 in primary circuit, after being again switched on ON/OFF switch 102 in predetermined amount of time after ON/OFF switchs the opening operation of 102, light source in secondary circuit is (such as, oneth LED chain 120 and the 2nd LED chain 130) colour temperature be adjusted to aim colour temperature value (such as, the first color temperature value or the second color temperature value) by brightness and color-temperature controller 112.
Fig. 4 show the brightness in Fig. 3 and the structural representation of color-temperature controller 112. Fig. 4 will be described in conjunction with Fig. 3. In the example of fig. 4, brightness and color-temperature controller 112 are divided into the brightness control module of the first half and the color temperature control module of the latter half.
The operation principle of brightness control module is as follows:
Brightness control module includes signal generator 410, TRIAC monitor 432 and driver 430. Signal generator 410 produces monitor signal (such as, square-wave signal 412). The average voltage of monitor signal and the average current I flowing through LED light source (such as, LED chain 120 or a 2nd LED chain 130)OUT(such as, electric current ILED1Or ILED2) proportional. TRIAC monitor 432 produces reference signal REF according to conduction detection signal TD. Reference signal REF instruction flows through target current value (such as, the target current value I of the average current of LED light source (such as, LED chain 120 or a 2nd LED chain 130)TARGET). Correspondingly, driver 430 produces to drive signal DRV based on square-wave signal 412 and reference signal REF. Signal generator 410, driver 430 and transformator 110 form negative feedback loop. This negative feedback loop keeps the average voltage of square-wave signal 412 equal to reference signal REF, thus being maintained to flow through the average current I of LED light source (such as, LED chain 120 or a 2nd LED chain 130)OUTEqual to target current value ITARGET. Note that the angle of flow of TRIAC dimmer 104 can change along with the rotation process of user, therefore refer to signal REF and also change accordingly. In this way, it is achieved that the adjustment to the brightness of LED light source.
Signal generator 410 includes Acquisition Circuit 402, state detector 404 and MUX 408. Acquisition Circuit 402 is connected with port CS, to receive the monitor signal LPSEN that instruction flows through the electric current of primary side winding 305. Acquisition Circuit 402 keeps according to monitor signal LPSEN sampling and produces the peak signal V proportional to the peak value of the electric current flowing through primary side winding 305PK. In one embodiment, MUX 408 includes the switch with the first port, the second port and the 3rd port. First port of MUX 408 is connected with the outfan of Acquisition Circuit 402, is used for receiving peak signal VPK. Second port of MUX 408 is connected with reference ground GND, is used for receiving predeterminated voltage signal VPRE(such as, VPREFor zero volt). 3rd port of MUX 408 is connected with the input of driver 430, is used for providing square-wave signal 412. In another embodiment, the second port of MUX 408 may also connect to other signal generator, receives pre-set constant reference voltage.
State detector 404 is connected with port FB, to receive current monitor signal SEN. According to current monitor signal SEN, state detector 404 judges whether transformator 110 works in preset state, and produce switch controlling signal 406 to control MUX 408. More specifically, in one embodiment, when current monitor signal SEN has the first magnitude of voltage that indication transformer 110 works in preset state, switch controlling signal 406 has the first state (such as, high level). Now, the first port of MUX 408 and the conducting of the 3rd port. Thus, square-wave signal 412 is equal to peak signal VPK. When current monitor signal SEN has the second magnitude of voltage that indication transformer 110 does not work in preset state, switch controlling signal 406 has the second state (such as, low level).Now, the second port of MUX 408 and the conducting of the 3rd port. Thus, square-wave signal 412 is equal to predeterminated voltage signal VPRE��
Advantageously, TRIAC monitor 432 can adjust reference signal REF according to TRIAC dimmer 104. More specifically, in one embodiment, if conduction detection signal TD indicates the TRIAC device 202 turn-on instant in each cycle to be shifted to an earlier date (that is, angle of flow increases), then TRIAC monitor 432 increases reference signal REF. Thus, the average current flowing through LED light source (such as, LED chain 120 or a 2nd LED chain 130) increases. In like manner, if conduction detection signal TD indicates the TRIAC device 202 turn-on instant in each cycle to be delayed by (that is, angle of flow reduces), then TRIAC monitor 432 reduces reference signal REF. Thus, the average current flowing through LED light source (such as, LED chain 120 or a 2nd LED chain 130) reduces. Brightness control module can have other structure, and is not limited to the embodiment of Fig. 4.
The structural representation of the TRIAC monitor 432 that Fig. 5 show in Fig. 4 according to an embodiment of the invention. Fig. 5 will be described in conjunction with Fig. 4. In the example of fig. 5, TRIAC monitor 432 includes potentiometer 502, comparator 506 and wave filter 510. In one embodiment, potentiometer 502 includes the resistance R7 and resistance R8 of series coupled. Potentiometer 502 receives conduction detection signal TD, and provides instruction commutating voltage VINVoltage division signal 504. Comparator 506 is by voltage division signal 504 and threshold voltage VTHCompare, and produce square-wave signal 508 according to comparative result. Wave filter 510 filters square-wave signal 508, to produce reference signal REF.
More specifically, in one embodiment, at moment T1To moment T2ON time TTRI_ONIn, voltage division signal 504 is more than threshold voltage VTH(such as, zero volt), square-wave signal 508 is switched to high level. At moment T2To moment T3Turn-off time TTRI_OFFIn, voltage division signal 504 is less than threshold voltage VTH, square-wave signal 508 is switched to low level. When the turn-on instant of TRIAC device 202 changes, the average voltage respective change of square-wave signal 508. Wave filter 510 filters square-wave signal 508, thus providing the reference signal REF proportional to the average voltage of square-wave signal 508. Therefore, LED light source is flowed through (such as by regulating reference signal REF adjustable, oneth LED chain 120 or the 2nd LED chain 130) average current, it is achieved thereby that according to the TRIAC dimmer 104 brightness adjustment control to LED light source (such as, LED chain 120 or a 2nd LED chain 130). TRIAC monitor 432 can have other structure, and is not limited to the embodiment of Fig. 5.
Driver 430 includes operational amplifier 414, sawtooth waveforms maker 420, comparator 426 and buffer 428. In one embodiment, operational amplifier 414 includes operation transconductance amplifier (OperationalTransconductanceAmplifier, OTA) 418 and electric capacity 416. The positive input of operation transconductance amplifier 418 receives square-wave signal 412, and reverse input end receives reference signal REF. Wherein, reference signal REF represents output electric current ILED1Or ILED2Target current value ITARGET. Operation transconductance amplifier 418 produces electric current I according to the difference between square-wave signal 412 and reference signal REF at outfan418To electric capacity 416 charge or discharge, thus producing error signal 422. Due to the ripple on electric capacity 416 filtering error signal 422, error signal 422 is by the average voltage V of square-wave signal 412SQ_AVGWith the difference between reference signal REF determines.In another embodiment, electric capacity 416, outside brightness and color-temperature controller 112, is connected with operation transconductance amplifier 418 by controller port.
Sawtooth waveforms maker 420 produces sawtooth signal SAW. Comparator 426 comparison error signal 422 and sawtooth signal SAW, and produce comparison signal. Buffer 428 receives comparison signal, and produces to drive signal DRV (such as, pulse-width signal). In the fig. 4 embodiment, if the average voltage V of square-wave signal 412SQ_AVGIncreasing, error signal 422 increases therewith, and sawtooth signal SAW then needs the more time to increase to error signal 422. Thus, the dutycycle of signal DRV is driven to reduce, thus reducing output electric current ILED1Or ILED2Average current, until the average voltage V of square-wave signal 412SQ_AVGIt is reduced to reference signal REF. In like manner, if the average voltage V of square-wave signal 412SQ_AVGReduce, drive the dutycycle of signal DRV to increase, thus increasing output electric current ILED1Or ILED2Average current, until the average voltage V of square-wave signal 412SQ_AVGIncrease to reference signal REF. So, output electric current ILED1Or ILED2Average current can be adjusted to and target current value ITARGETEqual, namely realize the brilliance control to light source (such as, LED chain 120 and a 2nd LED chain 130).
Additionally, the operation principle of color temperature control module is as follows:
The structural representation of the color temperature control module that Fig. 6 show in Fig. 4. In conjunction with Fig. 4 and Fig. 6, color temperature control module includes determining whether unit 434, not gate 436, startup and low pressure locking (UVL) circuit 438 and colour temperature control unit 440.
Start and low pressure locking (UVL) circuit 438 is connected with port VDD, for optionally starting the one or more parts within brightness and color-temperature controller 112 according to different power levels.
In one embodiment, if the voltage on port VDD is higher than the first predeterminated voltage, then starts and low pressure lock circuit 438 will start all of parts in brightness and color-temperature controller 112. When ON/OFF switchs 102 disconnections, if the voltage on port VDD is lower than the second predeterminated voltage, starts and low pressure lock circuit 438 will close in brightness and color-temperature controller 112 section components to save electric energy. If the voltage on port VDD is lower than the 3rd predeterminated voltage, starts and low pressure lock circuit 438 is by all for closedown parts. In one embodiment, the first predeterminated voltage is higher than the second predeterminated voltage, and the second predeterminated voltage is higher than the 3rd predeterminated voltage.
Identifying unit 434 is detected the energy state of brightness and color-temperature controller 112 and produces the first judgement signal VDD_L and the second judgement signal VDD_H based on the energy state of brightness and color-temperature controller 112. Based on first, brightness and color-temperature controller 112 judge that signal VDD_L, the second judgement signal VDD_H and switch monitors signal TS adjust the colour temperature of light source. Such as, if the voltage at the port VDD place of brightness and color-temperature controller 112 is less than reset threshold voltage (such as, 4V), then first judges that signal VDD_L has the first state (such as, logic high); If the voltage at the port VDD place of brightness and color-temperature controller 112 is more than reset threshold voltage (such as, 4V), then first judges that signal VDD_L has the second state (such as, logic low); If the voltage at the port VDD place of brightness and color-temperature controller 112 is less than enabling threshold voltage (such as, 10V), then second judges that signal VDD_H has the first state (such as, logic low);If the voltage at the port VDD place of brightness and color-temperature controller 112 is more than enabling threshold voltage (such as, 10V), then second judges that signal VDD_H has the second state (such as, logic high).
According to switch monitors signal TS, the first judgement signal VDD_L and the second, colour temperature control unit 440 is for judging that signal VDD_H produces the first control signal CTR1 and the second control signal CTR2 and controls LED chain 120 and a 2nd LED chain 130 respectively. In one embodiment, colour temperature control unit 440 includes timer the 602, first d type flip flop the 604, second d type flip flop 606, first and door 608 and second and door 610. Timer 602 receives switch monitors signal TS and starts timing when trailing edge occurs in switch monitors signal TS, and timer 602 also produces pulse signal TS_DE after the time predefined interval of delta t of each trailing edge of switch monitors signal TS. Pulse signal TS_DE is coupled in the input port CLK of the first d type flip flop 604, and switch monitors signal TS is coupled in the input port CLK of the second d type flip flop 606. The input port D1 of the first d type flip flop 604 is coupled in its output portAnd the output port Q1 of the first d type flip flop 604 is coupled in the input port D2 of the second d type flip flop 606.
The input port R of the first d type flip flop 604 and the second d type flip flop 606 is each coupled to the output port of not gate 436, and the input port of not gate 436 is coupled in identifying unit 434. If the voltage at the port VDD place of brightness and color-temperature controller 112 is less than reset threshold voltage (such as, 4V), first judges that signal VDD_L is as logic high, then the first d type flip flop 604 and the second d type flip flop 606 both pass through not gate 436 and are reset, therefore, the output port Q1 of the first d type flip flop 604 and output port Q2 of the second d type flip flop 606 is reset as logic low and the output port of the first d type flip flop 604Output port with the second d type flip flop 606All it is reset as logic high.
The second output port Q judging signal VDD_H and the second d type flip flop 6062Being each coupled to first and door 608, first produces the first control signal CTR1 with door 608 controls the first control switch 122 and flows through the electric current I of a LED chain 120LED1. Second judges that the output port Q2 of signal VDD_H and the second d type flip flop 606 is each coupled to second and door 610, and second produces the second control signal CTR2 with door 610 controls the second control switch 132 and flows through the electric current I of the 2nd LED chain 130LED2. In this way, brightness and color-temperature controller 112 can switch the opening operation of 102 in response to ON/OFF and adjust the colour temperature of light source.
Fig. 7 show the signal waveforms of the light source driving circuit comprising the color temperature control module shown in Fig. 6. Fig. 7 illustrates the signal waveform of switch monitors signal TS, pulse signal TS_DE, the first judgement signal VDD_L, the second judgement signal VDD_H, the voltage at input port D1 place, the voltage at output port Q1 place, the voltage at output port Q2 place, the first control signal CTR1 and the second control signal CTR2. Fig. 7 will be described in conjunction with Fig. 3 and Fig. 6.
In the t0 moment, ON/OFF switch 102 connection. In the t1 moment, switch monitors signal TS is from the first state (such as, logic low) change into the second state (such as, logic high), the voltage at port VDD place increases to reset threshold voltage (such as, 4V) and first judge signal VDD_L change into the second state (such as, logic low) from the first state (such as, logic high).In the t2 moment, the voltage at port VDD place increases to enable threshold voltage (such as, 10V) and second judge signal VDD_H change into the second state (such as, logic high) from the first state (such as, logic low). Within the t0 moment to the interval in t2 moment, the output port Q1 of the first d type flip flop 604 and output port Q2 of the second d type flip flop 606 is logic low. Judging that signal VDD_H as logic low with door 608 and second with the second of door 610 reception due to first, the first control signal CTR1 and the second control signal CTR2 is also logic low. After instant t 2, owing to second judges that signal VDD_H changes into logic high, the first control signal CTR1 also changes into logic high, and therefore, first controls switch 122 connection and electric current ILED1Begin flow through a LED chain 120. In the t3 moment, ON/OFF switch 102 disconnects, and the voltage at the port VDD place of brightness and color-temperature controller 112 begins to decline. As it has been described above, once trailing edge occurs in switch monitors signal TS, pulse signal TS_DE can be produced after time predefined interval of delta t. In the t4 moment, in response to the pulse signal TS_DE rising edge occurred, the input port D1 of the first d type flip flop 604 changes into logic low from logic high, and the output port Q1 of the first d type flip flop 604 changes into logic high from logic low. In the t5 moment, the voltage drop at port VDD place is low to moderate enable threshold voltage (such as, 10V), and second judges signal VDD_H from the second state (such as, logic high) change into the first state (such as, logic low). Accordingly, because with the second of door 610 reception, first judges that signal VDD_H is as logic low with door 608 and second, the first control signal CTR1 and the second control signal CTR2 is also logic low.
In the t6 moment, there is rising edge in switch monitors signal TS, and instruction ON/OFF switch 102 is again switched on. The interval in t3 moment to t6 moment is less than predetermined (regulation) interval (such as, t6-t3 < 3 second), so that the voltage at port VDD place is maintained at more than reset threshold voltage (such as, 4V) and first and judges that signal VDD_L remains logic low. In response to the switch monitors signal TS rising edge occurred, the output port Q2 of the second d type flip flop 606 changes into logic high and its output port from logic lowLogic low is changed into from logic high. Being similar to the t1 moment interval to the t2 moment, from the t6 moment to the interval in t7 moment, the first control signal CTR1 and the second control signal CTR2 is logic low. After the t7 moment, the voltage at port VDD place increases to more than enable threshold voltage, and second judges that signal VDD_H changes into logic high, and the second control signal CTR2 also changes into logic high, and second controls switch 132 connection and electric current ILED2Begin flow through the 2nd LED chain 130. Then, ON/OFF switch 102 is again off, and the voltage drop at t8 moment port VDD place is low to moderate enable threshold voltage (such as, 10V). Signal waveform from the t8 moment to the interval in t10 moment is similar to the signal waveform from the t0 moment to the interval in t5 moment. In the t9 moment, first controls switch 122 connection and electric current ILED1Begin flow through a LED chain 120.
Therefore, brightness and color-temperature controller 112 are alternatively switched on the first control switch 122 and the second control switch 132 in response to the ON/OFF opening operation switching 102, owing to the 2nd LED chain 130 can have the colour temperature different from a LED chain 120, therefore, brightness and color-temperature controller 112 can switch the opening operation of 102 to adjust the colour temperature of light source in response to ON/OFF.
Fig. 8 show the signal waveforms of the light source driving circuit comprising the color temperature control module shown in Fig. 6 according to another embodiment of the invention. Fig. 8 illustrates the signal waveform of switch monitors signal TS, pulse signal TS_DE, the first judgement signal VDD_L, the second judgement signal VDD_H, the voltage at input port D1 place, the voltage at output port Q1 place, the voltage at output port Q2 place, the first control signal CTR1 and the second control signal CTR2. Fig. 8 will be described in conjunction with Fig. 3, Fig. 6 and Fig. 7.
From t0 moment to t6 ' waveform in the interval in moment be similar in Fig. 7 from the t0 moment to the interval in t6 moment waveform. In the t7 ' moment, ON/OFF switch 102 is again switched on. T3 moment to the t7 ' moment interval greater than predetermined time interval (such as, t7 '-t3 > 3 seconds). Therefore, in the t6 ' moment, the voltage drop at port VDD place is low to moderate reset threshold voltage (such as, 4V), and first judges that signal VDD_L changes into logic high, output port Q1 and output port Q2 from logic low and is reset as logic low. Judging that signal VDD_H as logic low with door 608 and second with the second of door 610 reception due to first, the first control signal CTR1 and the second control signal CTR2 is also logic low.
In the t8 ' moment, switch monitors signal TS is from the first state (such as, logic low) change into the second state (such as, logic high), the voltage at port VDD place increases to reset threshold voltage (such as, 4V), and first judges signal VDD_L from the first state (such as, logic high) change into the second state (such as, logic low). In the t9 ' moment, the voltage at port VDD place increases to enable threshold voltage (such as, 10V), and second judges signal VDD_H from the first state (such as, logic low) change into the second state (such as, logic high). T7 ' the moment is similar to the t0 moment to the signal waveform in the interval in t2 moment to the signal waveform in the interval in t9 ' moment. After the t9 ' moment, the voltage at port VDD place increases to more than enable threshold voltage, and second judges that signal VDD_H changes into logic high, and the first control signal CTR1 also changes into logic high. Then, first controls switch 122 connection and electric current ILED1Begin flow through a LED chain 120.
As shown in Figure 7, if switch monitors signal TS indicates the interval between opening operation and next making operation of ON/OFF switch 102 less than predetermined time interval (such as, 3 seconds), then the colour temperature of light source (such as, LED chain 120 and a 2nd LED chain 130) is changed into the second color temperature value from the first color temperature value in response to ON/OFF next making operation switching 102 by brightness and color-temperature controller 112. More specifically, in the example in figure 7, the interim very first time (such as, from the t2 moment to the interval in t5 moment), first control signal CTR1 is logic high, oneth LED chain 120 is connected, and the 2nd LED chain 130 disconnects, so that the colour temperature of light source is adjusted to the first color temperature value; During being different from second interval at very first time interval (such as, from the t7 moment to the interval in t8 moment), the second control signal CTR2 is logic high, and a LED chain 120 disconnects, 2nd LED chain 130 is connected, so that the colour temperature of light source is adjusted to the second color temperature value. Therefore, the colour temperature that brightness and color-temperature controller 112 control switch 132 by being alternatively switched on the first control switch 122 and second and the colour temperature of light source is changed into from the colour temperature of a LED chain 120 the 2nd LED chain 130.But, as shown in Figure 8, if switch monitors signal TS indicate ON/OFF switch 102 opening operation and next making operation between interval greater than predetermined time interval (such as, 3 seconds), then the colour temperature of light source is reset to preset color temperature value in response to ON/OFF next making operation switching 102 by brightness and color-temperature controller 112. In the example of fig. 8, preset color temperature value can be the color temperature value of the first LED chain 120, for instance, by the color temperature value arranged when dispatching from the factory; Preset color temperature value is not limited to the color temperature value shown in the example of Fig. 8.
Fig. 9 show the method flow diagram 900 controlling light-source brightness and colour temperature according to embodiments of the present invention. Fig. 9 will be described in conjunction with Figure 1A-Fig. 8. The concrete steps contained in Fig. 9 are merely exemplary, i.e. the present invention is adapted for carrying out other step various or the step that the step of statement in Fig. 9 is improved.
In step 902, drive circuit is (such as, light source driving circuit 100 or 300) from power supply receive electric energy and by electric power converter (such as electric power converter 108) to light source (such as, LED chain 120 and a 2nd LED chain 130) provide regulate after electric energy.
In step 904, adjusting, according to conduction detection signal, the reference signal that instruction flows through the target current value of light source, thus adjusting the average current flowing through light source accordingly, and then regulating the brightness of light source. In one embodiment, received the conduction detection signal TD of the conducting state of the TRIAC dimmer 104 that instruction is coupling between power supply and electric power converter by brightness and color-temperature controller 112, and adjust, based on conduction detection signal TD, the reference signal that instruction flows through the target current value of light source. Specifically, conduction detection signal TD indicates the conducting state (such as, the angle of flow between 0-180 degree) of the TRIAC device 202 in TRIAC dimmer 104. Brightness and color-temperature controller 112 can provide the reference signal REF (in above-mentioned Fig. 4 and Fig. 5 describe in detail) of the angle of flow corresponding to TRIAC dimmer 104 according to conduction detection signal TD, and produce to drive signal DRV to adjust average current (such as, the electric current I flowing through LED light source at port PWM place according to reference signal REFLED1Or electric current ILED2)��
In step 906, receive switch monitors signal, the operation of the ON/OFF switch (such as, ON/OFF switch 102) that switch monitors signal (the switch monitors signal TS such as, brightness and color-temperature controller 112 received) instruction is coupling between power supply and electric power converter.
In step 908, the colour temperature of light source is adjusted based on switch monitors signal TS. Such as, the interim very first time (such as, the interval in t2 moment in the figure 7 to t5 moment), brightness can produce the first control signal CTR1 and connect a LED chain 120 with the first color temperature value with color-temperature controller 112, and produce the second control signal CTR2 and disconnect the 2nd LED chain 130 with the second color temperature value, so that the colour temperature of light source is adjusted to the first color temperature value; During being different from second interval at very first time interval (such as, the interval in t7 moment in the figure 7 to t8 moment), brightness and color-temperature controller 112 can produce the first control signal CTR1 and disconnect a LED chain 120, and produce the second control signal CTR2 and connect the 2nd LED chain 130, so that the colour temperature of light source is adjusted to the second color temperature value.
In this way, the operation that brightness and color-temperature controller 112 are possible not only to according to ON/OFF switch 102 adjusts light source (such as, oneth LED chain 120 and the 2nd LED chain 130) colour temperature, simultaneously operation according to TRIAC dimmer 104 can also adjust LED light source (such as, oneth LED chain 120 and the 2nd LED chain 130) brightness, without using extra dedicated devices, simple and convenient and provide cost savings.
Above description is based on the embodiment of LED chain and illustrates. But, it is also applied to other type of light source according to embodiments of the invention. In other words, embodiments of the invention are not limited to LED light source, are equally applicable to other type of light source.
At this, the wording of use and expression contribute to illustrative not limiting, use these wording and expression to be got rid of outside invention scope by any equivalent (or part equivalent) of the characteristic of diagram and description at this, would be likely to occur various amendment within the scope of the claims. Other amendment, variant and alternative also likely to be present. Therefore, claim is intended to this type of equivalents all.
Claims (20)
1. a light source driving circuit, for regulating brightness and the colour temperature of light source, it is characterised in that described light source driving circuit includes:
Electric power converter, is coupling between power supply and described light source, for receiving electric energy from described power supply and providing the electric energy after regulating to described light source; And
Brightness and color-temperature controller, it is coupled in described electric power converter, for receiving the conduction detection signal of the conducting state of the triode-thyristor dimmer that instruction is coupled between described power supply and described electric power converter, and the brightness of described light source is adjusted based on described conduction detection signal, wherein said brightness and color-temperature controller are additionally operable to receive the switch monitors signal of the operation of the ON/that instruction is coupled in described triode-thyristor dimmer, and adjust the colour temperature of described light source based on described switch monitors signal.
2. light source driving circuit according to claim 1, it is characterised in that described brightness and color-temperature controller include:
Signal generator, for producing the monitor signal proportional to the average current flowing through described light source;
Triode-thyristor monitor, for receiving described conduction detection signal and producing to indicate the reference signal of the desired value of the average current flowing through described light source according to described conduction detection signal; And
Driver, is coupled in described signal generator and described triode-thyristor monitor, for producing to drive signal according to described monitor signal and described reference signal, provides the electric energy after described adjustment to described light source controlling described electric power converter.
3. light source driving circuit according to claim 2, it is characterized in that, transformator composition negative feedback loop in described signal generator, described driver and described electric power converter, described negative feedback loop is maintained to flow through the described average current of described light source equal to described desired value.
4. light source driving circuit according to claim 2, it is characterized in that, the angle of flow of triode-thyristor dimmer described in described conduction detection signal designation, if angle of flow described in described conduction detection signal designation increases, then described triode-thyristor monitor increases described reference signal and the described driver described driving signal of adjustment to increase the described average current flowing through described light source, if and angle of flow described in described conduction detection signal designation reduces, then described triode-thyristor monitor reduces described reference signal and the described driver described driving signal of adjustment to reduce the described average current flowing through described light source.
5. light source driving circuit according to claim 1, it is characterized in that, described light source includes having the first light-emitting component of the first color temperature value and has the second light-emitting component of the second color temperature value, described brightness and color-temperature controller include the colour temperature control unit for producing the first control signal and the second control signal according to described switch monitors signal, wherein said first control signal selectivelyes switch on be coupling between described brightness and color-temperature controller and described first light-emitting component first and controls switch so that the colour temperature of described light source is adjusted to described first color temperature value, described second control signal selectivelyes switch on be coupling between described brightness and color-temperature controller and described second light-emitting component second and controls switch so that the colour temperature of described light source is adjusted to described second color temperature value.
6. light source driving circuit according to claim 5, it is characterised in that described colour temperature control unit includes:
Timer, is used for receiving described switch monitors signal, and described timer starts timing when trailing edge occurs in described switch monitors signal, and produces pulse signal after the time predefined interval of described trailing edge;
First d type flip flop, is used for receiving described pulse signal; And
Second d type flip flop, is coupled in described first d type flip flop, is used for receiving described switch monitors signal;
Wherein said first control signal and described second control signal are based on the output signal of described second d type flip flop and produce.
7. light source driving circuit according to claim 1, it is characterized in that, described brightness and color-temperature controller include determining whether unit, described identifying unit is for detecting the energy state of described brightness and color-temperature controller and producing the first judgement signal and second based on the described energy state of described brightness and color-temperature controller and judge signal, and described brightness and color-temperature controller are based on described first judging signal, described second judging that signal and described switch monitors signal adjust the colour temperature of described light source.
8. light source driving circuit according to claim 1, it is characterized in that, if the interval between opening operation and next making operation of ON/described in described switch monitors signal designation is less than predetermined time interval, then the colour temperature of described light source is adjusted to the second color temperature value from the first color temperature value in response to next making operation described in described ON/by described brightness and color-temperature controller.
9. light source driving circuit according to claim 1, it is characterized in that, if between opening operation and next making operation of ON/described in described switch monitors signal designation interval greater than predetermined time interval, then the colour temperature of described light source is reset to preset color temperature value in response to next making operation described in described ON/by described brightness and color-temperature controller.
10. light source driving circuit according to claim 1, it is characterized in that, described light source driving circuit also includes commutator, described electric power converter includes transformator, described transformator includes primary side winding, vice-side winding and auxiliary winding, described primary side winding is coupled in described commutator and receives electric energy by described commutator from described power supply, described vice-side winding is for the electric energy after providing described adjustment to described light source, described auxiliary winding is for powering to described brightness and color-temperature controller, described ON/and described triode-thyristor dimmer are coupling between described power supply and described commutator.
11. light source driving circuit according to claim 1, it is characterized in that, described brightness and color-temperature controller are for receiving the current monitor signal that instruction flows through the current value of described light source, and control the electric energy provided after the described adjustment of described light source according to described current monitor signal.
12. brightness and a color-temperature controller, for controlling brightness and the colour temperature of light source, it is characterised in that described brightness and color-temperature controller include:
Signal generator, for producing the monitor signal proportional to the average current flowing through described light source;
Triode-thyristor monitor, for receiving the conduction detection signal of the conducting state of the triode-thyristor dimmer that instruction is coupled between power supply and electric power converter and producing to indicate the reference signal of the desired value of the average current flowing through described light source according to described conduction detection signal;
Driver, is coupled in described signal generator and described triode-thyristor monitor, for producing to drive signal according to described monitor signal and described reference signal, to control the electric energy after the offer of described electric power converter regulates to described light source; And
Colour temperature control unit, for receiving the switch monitors signal of the operation indicating the ON/being coupled in described triode-thyristor dimmer, and adjusts the colour temperature of described light source based on described switch monitors signal.
13. brightness according to claim 12 and color-temperature controller, it is characterized in that, transformator composition negative feedback loop in described signal generator, described driver and described electric power converter, described negative feedback loop is maintained to flow through the described average current of described light source equal to described desired value.
14. brightness according to claim 12 and color-temperature controller, it is characterized in that, the angle of flow of triode-thyristor dimmer described in described conduction detection signal designation, if angle of flow described in described conduction detection signal designation increases, then described triode-thyristor monitor increases described reference signal and the described driver described driving signal of adjustment to increase the described average current flowing through described light source, if and angle of flow described in described conduction detection signal designation reduces, then described triode-thyristor monitor reduces described reference signal and the described driver described driving signal of adjustment to reduce the described average current flowing through described light source.
15. brightness according to claim 12 and color-temperature controller, it is characterized in that, described light source includes having the first light-emitting component of the first color temperature value and has the second light-emitting component of the second color temperature value, described colour temperature control unit produces the first control signal and the second control signal according to described switch monitors signal, described first control signal selectivelyes switch on be coupling between described brightness and color-temperature controller and described first light-emitting component first and controls switch so that the colour temperature of described light source is adjusted to described first color temperature value, described second control signal selectivelyes switch on be coupling between described brightness and color-temperature controller and described second light-emitting component second and controls switch so that the colour temperature of described light source is adjusted to described second color temperature value.
16. brightness according to claim 15 and color-temperature controller, it is characterised in that described colour temperature control unit includes:
Timer, is used for receiving described switch monitors signal, and starts timing when trailing edge occurs in described switch monitors signal, produces pulse signal after the time predefined interval of described trailing edge;
First d type flip flop, is used for receiving described pulse signal; And
Second d type flip flop, is coupled in described first d type flip flop, is used for receiving described switch monitors signal;
Wherein said first control signal and described second control signal are based on the output signal of described second d type flip flop and produce.
17. brightness according to claim 12 and color-temperature controller, it is characterized in that, described brightness and color-temperature controller also include determining whether unit, described identifying unit is for detecting the energy state of described brightness and color-temperature controller and producing the first judgement signal and second based on the described energy state of described brightness and color-temperature controller and judge signal, and described brightness and color-temperature controller are based on described first judging signal, described second judging that signal and described switch monitors signal adjust the colour temperature of described light source.
18. brightness according to claim 12 and color-temperature controller, it is characterized in that, if the interval between opening operation and next making operation of ON/described in described switch monitors signal designation is less than predetermined time interval, then the colour temperature of described light source is adjusted to the second color temperature value from the first color temperature value in response to next making operation described in described ON/by described brightness and color-temperature controller.
19. brightness according to claim 18 and color-temperature controller, it is characterized in that, described light source includes having the first light-emitting component of described first color temperature value and has the second light-emitting component of described second color temperature value, described brightness and color-temperature controller are by producing the first control signal and the second control signal adjusts the color temperature of described light source, when described first control signal connects the first control switch being coupling between described brightness and color-temperature controller and described first light-emitting component, electric current flows through the colour temperature of described first light-emitting component and described light source and is adjusted to described first color temperature value, when described second control signal connects the second control switch being coupling between described brightness and color-temperature controller and described second light-emitting component, electric current flows through the colour temperature of described second light-emitting component and described light source and is adjusted to described second color temperature value.
20. brightness according to claim 12 and color-temperature controller, it is characterized in that, if between opening operation and next making operation of ON/described in described switch monitors signal designation interval greater than predetermined time interval, then the colour temperature of described light source is reset to preset color temperature value in response to next making operation described in described ON/by described brightness and color-temperature controller.
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|---|---|---|---|
| CN201410729730.5A CN105657932B (en) | 2014-12-04 | 2014-12-04 | Light source driving circuit and brightness and color-temperature controller |
| TW104139427A TWI653907B (en) | 2014-12-04 | 2015-11-26 | A driver circuit for a light source, and a controller for luminance and color temperature |
| US14/954,613 US9781793B2 (en) | 2008-12-12 | 2015-11-30 | Controlling brightness and color temperature of light sources |
| JP2015235511A JP2016111018A (en) | 2014-12-04 | 2015-12-02 | Controlling brightness and color temperature of light sources |
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| CN201410729730.5A CN105657932B (en) | 2014-12-04 | 2014-12-04 | Light source driving circuit and brightness and color-temperature controller |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106211486A (en) * | 2016-08-31 | 2016-12-07 | 深圳市明微电子股份有限公司 | A kind of LED lamp and light modulation toning circuit thereof |
| CN106793317A (en) * | 2016-12-30 | 2017-05-31 | 杰华特微电子（杭州）有限公司 | Light adjusting circuit, light-dimming method and LED drive circuit |
| CN106973468A (en) * | 2017-05-26 | 2017-07-21 | 深圳市安吉丽光电科技有限公司 | A kind of LED light modulation toning circuits designed based on DOB |
| CN107172745A (en) * | 2017-06-05 | 2017-09-15 | 广州视源电子科技股份有限公司 | Color temperature automatic adjusting method and device and lamp mirror |
| CN110392461A (en) * | 2018-04-18 | 2019-10-29 | 凹凸电子（武汉）有限公司 | Controller, light source driving circuit and the method for controlling light source module |
| TWI698153B (en) * | 2017-12-20 | 2020-07-01 | 美商亮銳公司 | Dimmer switch interface and led light system |
| CN112512159A (en) * | 2020-12-01 | 2021-03-16 | 怡迅（珠海）光电科技有限公司 | Lamp control system and control method thereof |
| CN112672460A (en) * | 2019-10-15 | 2021-04-16 | 凹凸电子(成都)有限公司 | Controller and method for controlling light source module |
| CN114258170A (en) * | 2021-11-29 | 2022-03-29 | 中山市特新电子科技有限公司 | A lamp control device, a controllable color temperature lamp and a data transmission method |
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| CN202551428U (en) * | 2012-03-20 | 2012-11-21 | 厦门高贤电子科技有限公司 | Regulation and control device for LED (light-emitting diode) lamp |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106211486A (en) * | 2016-08-31 | 2016-12-07 | 深圳市明微电子股份有限公司 | A kind of LED lamp and light modulation toning circuit thereof |
| CN106211486B (en) * | 2016-08-31 | 2018-09-28 | 深圳市明微电子股份有限公司 | A kind of LED lamp and its light modulation toning circuit |
| CN106793317A (en) * | 2016-12-30 | 2017-05-31 | 杰华特微电子（杭州）有限公司 | Light adjusting circuit, light-dimming method and LED drive circuit |
| CN106793317B (en) * | 2016-12-30 | 2018-12-14 | 杰华特微电子（杭州）有限公司 | Light adjusting circuit, light-dimming method and LED drive circuit |
| CN106973468A (en) * | 2017-05-26 | 2017-07-21 | 深圳市安吉丽光电科技有限公司 | A kind of LED light modulation toning circuits designed based on DOB |
| CN107172745A (en) * | 2017-06-05 | 2017-09-15 | 广州视源电子科技股份有限公司 | Color temperature automatic adjusting method and device and lamp mirror |
| TWI698153B (en) * | 2017-12-20 | 2020-07-01 | 美商亮銳公司 | Dimmer switch interface and led light system |
| CN110392461A (en) * | 2018-04-18 | 2019-10-29 | 凹凸电子（武汉）有限公司 | Controller, light source driving circuit and the method for controlling light source module |
| CN112672460A (en) * | 2019-10-15 | 2021-04-16 | 凹凸电子(成都)有限公司 | Controller and method for controlling light source module |
| CN112512159A (en) * | 2020-12-01 | 2021-03-16 | 怡迅（珠海）光电科技有限公司 | Lamp control system and control method thereof |
| CN114258170A (en) * | 2021-11-29 | 2022-03-29 | 中山市特新电子科技有限公司 | A lamp control device, a controllable color temperature lamp and a data transmission method |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI653907B (en) | 2019-03-11 |
| CN105657932B (en) | 2018-05-15 |
| TW201633848A (en) | 2016-09-16 |
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