CN212970165U - Dimming and color mixing circuit and lighting lamp - Google Patents
Dimming and color mixing circuit and lighting lamp Download PDFInfo
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- CN212970165U CN212970165U CN202021461440.4U CN202021461440U CN212970165U CN 212970165 U CN212970165 U CN 212970165U CN 202021461440 U CN202021461440 U CN 202021461440U CN 212970165 U CN212970165 U CN 212970165U
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Abstract
The utility model belongs to the technical field of the electronic circuit, a mixing of colors circuit and illumination lamps and lanterns adjust luminance is provided, including dimming circuit, switching power supply circuit, power failure detection circuit and master control circuit, the alternating current signal conversion of power supply electric wire netting output through switching power supply circuit is the direct current signal, with supplying power to the light source circuit, and master control circuit detects switching power supply circuit according to power failure detection circuit and whether falls the electricity, switch the control mode to the light source circuit, master control circuit adjusts the current of light source circuit according to the adjustting of the lighteness signal of dimming circuit output simultaneously, the effect of mixing of colors of adjusting luminance simultaneously has been realized. Adopt the switching mode to reach the effect of adjusting luminance alone, mixing of colors alone and synchronous dimming mixing of colors from this, greatly satisfied user's diversified demand, solved current lamps and lanterns lighting technology and had or can only adjust luminance, or can only mix colors, lead to the flexibility lower and user experience to feel relatively poor problem.
Description
Technical Field
The utility model belongs to the technical field of electronic circuit, especially, relate to a mixing of colors circuit and illumination lamps and lanterns adjust luminance.
Background
At present, a 0-10V dimming technology or a dial-up dimming technology is mainly adopted for a large panel lamp and a down lamp to realize the dimming function of the lamp, a 0-10V dimming module has the limitation of only aiming at single-tone brightness, dial-up dimming or dial-up color mixing can also correspondingly realize the adjustment control of color temperature or brightness, the flexibility is low, the dimming and color mixing effects cannot be simultaneously met, and the user experience is poor.
Therefore, the existing lamp illumination technology has the problems of low flexibility and poor user experience caused by dimming or color mixing.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a mixing of colors circuit and illumination lamps and lanterns adjust luminance aims at solving current lamps and lanterns lighting technology and has or can only adjust luminance, or can only mix colours, leads to the flexibility lower and user experience to feel relatively poor problem.
The utility model discloses the first aspect provides a mixing of colors circuit of adjusting luminance, include:
a dimming circuit for outputting a brightness adjustment signal;
the switch power supply circuit is used for accessing a power supply grid, converting an alternating current signal output by the power supply grid into a direct current signal and then supplying power to the light source circuit;
the power failure detection circuit is connected with the switching power supply circuit and used for detecting whether the switching power supply circuit is powered down or not so as to output a detection signal, and the power failure detection circuit is powered up and redetected within a preset time after the power failure; and
and the master control circuit is connected with the dimming circuit, the switching power supply circuit and the power failure detection circuit, and is used for switching a control mode of the light source circuit according to the detection signal and regulating current flowing through the light source circuit according to the brightness regulation signal, wherein the control mode comprises a dimming mode, a color mixing mode and a dimming and color mixing mode.
Adopt the switching mode to reach the effect of adjusting luminance alone, adjusting luminance alone and adjusting luminance and mixing of colors in step from this, greatly satisfied user's diversified demand.
In one embodiment, the dimming circuit includes:
a seventh diode, a thirteenth diode, a fourteenth diode, a seventeenth diode, a third switching tube, a seventh switching tube, an eleventh switching tube, a twelfth switching tube, a thermistor, a twenty-ninth resistor, a thirty-fifth resistor, a thirty-ninth resistor, a forty-fourth resistor, a forty-first resistor, a forty-second resistor, a forty-third resistor, a forty-seventh resistor, a twenty-third capacitor, a twenty-fifth capacitor and a twenty-sixth capacitor;
a cathode of the seventeenth diode is connected to the 0-10V dimming controller, an anode of the seventeenth diode is connected to the first end of the thirty-fifth resistor, the second end of the thirty-fifth resistor, the first end of the forty-seventh resistor, a cathode of the thirteenth diode and an output end of the twelfth switching tube, the second end of the forty-seventh resistor is connected to the first end of the forty-second resistor and the first end of the twenty-sixth capacitor, an anode of the thirteenth diode is connected to the second end of the forty-second resistor and the second end of the twenty-sixth capacitor, a controlled end of the twelfth switching tube is connected to the output end of the eleventh switching tube and the first end of the thirty-ninth resistor, a second end of the thirty-ninth resistor is connected to the ground, and an input end of the twelfth switching tube is connected to the controlled end of the eleventh switching tube and the first end of the forty-second resistor, the second end of the forty-first resistor, the input end of the eleventh switch tube, the output end of the third switch tube, the first end of the twenty-third capacitor and the input end of the seventh switch tube are connected in common, the controlled end of the seventh switch tube, the second end of the twenty-third capacitor and the anode of the seventh diode are grounded, the controlled end of the third switch tube, the first end of the twenty-ninth resistor and the cathode of the seventh diode are connected in common, the input end of the third switch tube, the second end of the twenty-ninth resistor and the first end of the forty-third resistor are connected in common, the second end of the forty-third resistor is connected to the cathode of the fourteenth diode, the output end of the seventh switch tube is connected to the first end of the forty-first resistor, and the second end of the forty-first resistor is connected to the first end of the thermistor and the first end of the twenty-fifth capacitor in common, and the second end of the thermistor and the second end of the twenty-fifth capacitor are grounded. This embodiment defines a specific circuit structure of the dimming circuit.
In one embodiment, the power down detection circuit includes:
a nineteenth diode, a twenty-fifth diode, a fifteenth switching tube, a twenty-eighth capacitor, a thirty-first resistor, a seventy-third resistor, a seventy-fourth resistor, a seventy-fifth resistor and a seventy-sixth resistor;
an anode of the nineteenth diode is connected to the switching power supply circuit, a cathode of the nineteenth diode is connected to a first end of the seventy-third resistor, a second end of the seventy-third resistor, a first end of the seventy-fourth resistor, a first end of the twenty-eighth capacitor and a cathode of the twenty-fifth diode are connected in common, a second end of the seventy-fourth resistor and a second end of the twenty-eighth capacitor are grounded, an anode of the twenty-fifth diode is connected to a first end of the seventy-fifth resistor, a second end of the seventy-fifth resistor is connected to a first end of the seventy-sixth resistor and a controlled end of the fifteenth switching tube in common, an input end of the fifteenth switching tube is connected to the first end of the thirty-first resistor and the master control circuit in common, and a second end of the seventy-sixth resistor is connected to an output end of the fifteenth switching tube in ground, and the second end of the thirty-first resistor is connected with a reference voltage. The embodiment defines a specific circuit structure of the power down detection circuit.
In one embodiment, the main control circuit comprises a single chip microcomputer. This embodiment defines the type selection characteristic of the master control circuit.
In one embodiment, the switching power supply circuit includes:
the device comprises an isolation transformer, an integrated circuit chip and a field effect tube;
the integrated circuit chip is respectively connected with the field effect transistor and the isolation transformer, and is used for correspondingly controlling the field effect transistor to be switched on and off at a preset frequency according to the switching on and switching off of the wall control switch, and the voltage of the secondary side coil of the isolation transformer is also oscillated at the preset frequency. Therefore, the light source circuit can be dimmed and color-mixed only by pressing the wall control switch by a user, and the mode is simple, convenient and easy to operate.
In one embodiment, the switching power supply circuit further includes a rectification module, and the rectification module is configured to rectify an ac signal output by the power supply grid. Therefore, after the alternating current signal output by the power supply grid is rectified, the constant signal is output to drive the light source circuit to work.
In one embodiment, the rectifier module comprises a rectifier bridge. This embodiment defines the model selection characteristic of the rectifier module.
The utility model discloses the second aspect provides an illumination lamps and lanterns, including the light source circuit, still include as above-mentioned adjust luminance mixing of colors circuit.
This illumination lamps and lanterns adopt the switching mode to reach the effect of adjusting luminance alone, mixing of colors alone and synchronous dimming mixing of colors, have greatly satisfied user's diversified demand.
In one embodiment, the light source circuit includes at least two light emitting modules, wherein each light emitting module includes LED strings connected in series. At least two paths of light-emitting modules with different hues are adopted to control different light-emitting modules or different numbers of light-emitting modules to be on or off so as to achieve the effect of color mixing.
In one embodiment, the light source circuit includes a first light emitting module and a second light emitting module;
the control mode comprises the steps of independently adjusting the brightness of the first path of light-emitting module, independently adjusting the brightness of the second path of light-emitting module, adjusting the color temperature of the first path of light-emitting module and the second path of light-emitting module, and simultaneously adjusting the color temperature and the brightness of the first path of light-emitting module and the second path of light-emitting module. This embodiment defines the case where the light source circuit includes two light emitting modules.
The utility model provides a pair of adjust luminance mixing of colors circuit and illumination lamps and lanterns, including dimming circuit, switching power supply circuit, fall power detection circuit and master control circuit, alternating current signal conversion to the power supply electric wire netting output through switching power supply circuit is direct current signal, in order to supply power to the light source circuit, and master control circuit detects switching power supply circuit according to falling power detection circuit and whether falls the power, switch the control mode to the light source circuit, master control circuit is according to the adjustting of the lighteness signal of dimming circuit output simultaneously, adjust the electric current of flowing through the light source circuit, the effect of the mixing of colors of can adjusting luminance simultaneously has been realized. Adopt the switching mode to reach the effect of adjusting luminance alone, mixing of colors alone and synchronous dimming mixing of colors from this, greatly satisfied user's diversified demand, solved current lamps and lanterns lighting technology and had or can only adjust luminance, or can only mix colors, lead to the flexibility lower and user experience to feel relatively poor problem.
Drawings
Fig. 1 is a schematic diagram of a module structure of a dimming and color mixing circuit provided by the present invention.
Fig. 2 is an exemplary circuit diagram corresponding to the dimming and toning circuit provided in fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 shows a module structure of a dimming and color mixing circuit provided by the present invention, and for convenience of description, only the parts related to the present embodiment are shown, and detailed descriptions are as follows:
a dimming and toning circuit comprises a dimming circuit 106, a switching power supply circuit 102, a power failure detection circuit 104 and a main control circuit 105.
The dimming circuit 106 is configured to output a brightness adjustment signal. Specifically, the dimming circuit is connected to a 0-10V dimming controller to output a brightness adjusting signal with a voltage range of 0-10V to the main control circuit 105.
The switching power supply circuit 102 is used for accessing the power supply grid 101, and converting an alternating current signal output by the power supply grid 101 into a direct current signal to supply power to the light source circuit 103. Specifically, the switching power supply circuit 102 has a function of rectification on the one hand, and a function of flyback isolation constant current driving on the other hand.
The power-down detection circuit 104 is connected to the switching power supply circuit 102, and is configured to detect whether the switching power supply circuit 102 is powered down, output a detection signal, and power up and detect again within a preset time after the power down. Specifically, once it is detected that the switching power supply circuit 102 is powered down, timing is started, power is supplied again within a preset time, the original control mode is switched to the next setting mode, and if power is not supplied after the preset time is timed, original mode information is latched into the main control circuit 105, so that control is performed according to the original control mode when power is supplied next time.
The main control circuit 105 is connected to the dimming circuit 106, the switching power supply circuit 102, and the power failure detection circuit 104, and is configured to switch a control mode of the light source circuit 103 according to the detection signal, and to adjust a current flowing through the light source circuit 103 according to the brightness adjustment signal, where the control mode includes a dimming mode, a color adjustment mode, and a dimming and color adjustment mode.
Specifically, the power supply circuit 103 is formed by a first LED light string and a second LED light string with different hues, and according to the brightness adjustment signal output by the dimming circuit 106, the main control circuit 105 controls the total current value output from the switching power supply circuit 102 to the power supply circuit, so as to perform dimming on the power supply circuit 103; meanwhile, the main control circuit 105 controls the on/off conditions of the first LED light string and the second LED light string according to the detection signal output by the power-down detection circuit 104, for example: in a first control mode, the first LED light string is on and the second LED light string is off; in a second control mode, the first LED lamp string is off and the second LED lamp string is on; in a third control mode, the first LED lamp string and the second LED lamp string are simultaneously lightened; because the first LED light string and the second LED light string have different color tones, the light source circuit 103 can be color-modulated in the above three control modes. Of course, the power circuit 103 is not limited to include the first LED light string and the second LED light string. In conclusion, the switching mode is adopted to achieve the effects of single dimming, single color mixing and synchronous dimming and color mixing, and the diversified requirements of users are greatly met.
And, the above-mentioned switching mode includes adopting wall control switch or dial switch to carry on the switching control.
Fig. 2 shows an example circuit of a dimming and color mixing circuit provided by the present invention, and for convenience of description, only the part related to the present embodiment is shown, and the details are as follows:
in an embodiment of the invention, the dimming circuit 106 includes a seventh diode D7, a thirteenth diode D13, a fourteenth diode D14, a seventeenth diode D17, a third switch Q3, a seventh switch Q7, an eleventh switch Q11, a twelfth switch Q12, a thermistor NTC, a twenty-ninth resistor R29, a thirty-fifth resistor R35, a thirty-ninth resistor R39, a forty-fourth resistor R40, a forty-first resistor R41, a forty-second resistor R42, a forty-third resistor R43, a forty-seventh resistor R47, a twenty-third capacitor C23, a twenty-fifth capacitor C25 and a twenty-sixth capacitor C26.
A cathode of the seventeenth diode D17 is connected to the 0-10V dimming controller, an anode of the seventeenth diode D17 is connected to the first end of the thirty-fifth resistor R35, the second end of the thirty-fifth resistor R35, the first end of the forty-seventh resistor R47, a cathode of the thirteenth diode D13 and an output end of the twelfth switch Q12 are connected in common, the second end of the forty-seventh resistor R47 is connected to the first end of the forty-second resistor R42 and the first end of the twenty-sixth capacitor C26 in common, an anode of the thirteenth diode D13 is connected to the second end of the forty-second resistor R42 and the second end of the twenty-sixth capacitor C26 in common, a controlled terminal of the twelfth switch Q12 is connected to the output end of the eleventh switch Q11 and the first end of the thirty-ninth resistor R39 in common, the second end of the thirty-ninth resistor R39 in common, an input terminal of the twelfth switch Q12, the eleventh switch Q11 and the forty-fourth terminal of the forty switch Q40, the second end of the fortieth resistor R40, the input end of the eleventh switch tube Q11, the output end of the third switch tube Q3, the first end of the twenty-third capacitor C23 and the input end of the seventh switch tube Q7 are connected in common, a controlled terminal of the seventh switch Q7 is grounded to the second terminal of the twenty-third capacitor C23 and the anode of the seventh diode D7, a controlled terminal of the third switch Q3 is grounded to the first terminal of the twenty-ninth resistor R29 and the cathode of the seventh diode D7, an input terminal of the third switch Q3 is grounded to the second terminal of the twenty-ninth resistor R29 and the first terminal of the forty-third resistor R43, a second terminal of the forty-third resistor R43 is grounded to the cathode of the fourteenth diode D14, an output terminal of the seventh switch Q7 is grounded to the first terminal of the forty-first resistor R41, a second terminal of the forty-first resistor R41 is grounded to the first terminal of the thermistor NTC and the first terminal of the twenty-fifth capacitor C25, and a second terminal of the thermistor NTC is grounded to the second terminal of the twenty-fifth capacitor C25. This embodiment defines a specific circuit structure of the dimming circuit 106.
As an embodiment of the present invention, the power down detection circuit 104 includes a nineteenth diode D19, a twenty-fifth diode D25, a fifteenth switch tube Q15, a twenty-eighth capacitor C28, a thirty-first resistor R31, a seventy-third resistor R73, a seventy-fourth resistor R74, a seventy-fifth resistor R75, and a seventy-sixth resistor R76.
The anode of the nineteenth diode D19 is connected to the switching power supply circuit 102, the cathode of the nineteenth diode D19 is connected to the first end of the seventy-third resistor R73, the second end of the seventy-third resistor R73, the first end of the seventy-fourth resistor R74, the first end of the twenty-eighth capacitor C28 and the cathode of the twenty-fifth diode D25 are connected in common, the second end of the seventy-fourth resistor R74 and the second end of the twenty-eighth capacitor C28 are connected to ground, the anode of the twenty-fifth diode D25 is connected to the first end of the seventy-fifth resistor R75, the second end of the seventy-fifth resistor R75 is connected to the first end of the seventy-sixth resistor R76 and the controlled end of the fifteenth switch tube Q15 in common, the input end of the fifteenth switch tube Q15 and the first end of the thirty-eleventh resistor R31 are connected in common and connected to the main control circuit 105, the second end of the seventy-sixth resistor R76 and the output end of the fifteenth switch tube Q15 are connected to ground, and the second end of the thirty-eleventh resistor R31 is connected to the reference voltage. The embodiment defines a specific circuit configuration of the power down detection circuit 104.
As an embodiment of the present invention, the main control circuit 105 includes a main control chip U3, and the main control chip U3 generally adopts a Micro Controller Unit (MCU), such as a single chip microcomputer; the main control chip U3 has an acquisition pin and an enable pin, the acquisition pin is connected with the power failure detection circuit 104 and the dimming circuit 106 for acquiring a detection signal and a brightness adjustment signal, and the enable pin is connected with the switching power supply circuit 102 and the light source circuit 103 for adjusting the total current output by the switching power supply circuit 102 and the current of different channels in the light source circuit 103, so as to achieve the effects of dimming and color adjustment.
As an embodiment of the present invention, the switching power supply circuit 102 includes an isolation transformer T1, an integrated circuit chip U1, and a field effect transistor Q2.
The integrated circuit chip U1 is connected to the fet Q2 and the isolation transformer T1, respectively, and the integrated circuit chip U1 is configured to control the fet Q2 to turn on and off at a preset frequency according to the on and off of the wall switch, and the secondary winding voltage of the isolation transformer T1 also oscillates at the preset frequency. In this embodiment, the fet Q2 is an N-channel MOS transistor. Therefore, the light source circuit 103 can be dimmed and color-adjusted only by pressing the wall control switch by a user, and the mode is simple and convenient and easy to operate.
As an embodiment of the present invention, the switching power supply circuit 102 further includes a rectification module, and the rectification module is used for rectifying the ac signal output by the power supply grid 101. Therefore, the light source circuit 103 is driven to operate by outputting a constant signal after rectifying the alternating current signal output by the power supply grid 101.
Illustratively, the rectifier module includes a rectifier bridge BD1 for rectifying an ac signal output by the power supply grid 101 to supply power to the light source circuit 103.
The utility model also provides an illumination lamps and lanterns, including light source circuit 103, still include as above-mentioned adjust luminance mixing of colors circuit. The lighting lamp comprises a panel lamp and a down lamp.
It should be noted that the lighting fixture is provided with the light source circuit 103 on the basis of the dimming and color-adjusting circuit, so that the functional description and the principle description of the dimming circuit 106, the switching power supply circuit 102, the power-down detection circuit 104, and the main control circuit 105 in the dimming and color-adjusting circuit can refer to the embodiment in fig. 1 and 2, and details are not repeated here.
It should be understood that the light source circuit 103 includes at least two light emitting modules, wherein each light emitting module includes LED strings connected in series. At least two paths of light-emitting modules with different hues are adopted to control different light-emitting modules or different numbers of light-emitting modules to be on or off so as to achieve the effect of color mixing.
Illustratively, the light source circuit 103 includes a first light emitting module and a second light emitting module;
the control mode comprises the steps of independently adjusting the brightness of the first path of light-emitting module, independently adjusting the brightness of the second path of light-emitting module, adjusting the color temperatures of the first path of light-emitting module and the second path of light-emitting module, and simultaneously adjusting the color temperatures and the brightness of the first path of light-emitting module and the second path of light-emitting module.
For example: the light source circuit 103 comprises an LED-H (5000K) light source and an LED-L (2700K) light source, and four control modes are switched by adopting a wall control switch as follows:
the first mode is as follows: the 0-10V dimming controller adjusts the brightness output of the LED-H (5000K) light source;
and a second mode: a 0-10V dimming controller adjusts the brightness output of the LED-L (2700K) light source;
and a third mode: the 0-10V dimming controller adjusts the color temperature and the brightness output of the LED-H (5000K) + LED-L (2700K) light source;
and a fourth mode: the 0-10V dimming controller adjusts the color temperature of the LED-H (5000K) + LED-L (2700K) light source, but the output current is constant;
the wall control switch is circularly switched to the next control mode within the preset time of 2 seconds, has a memory function, is switched off for more than 2 seconds, and is switched on to enter the last control mode before the switching off. This embodiment defines the case where the light source circuit 103 includes two light emitting modules, and of course, the case of a multi-light emitting module and so on.
The following describes the operating principle of the dimming and color-adjusting circuit and the lighting fixture with reference to fig. 1 to fig. 2 as follows:
after power-on work, an integrated circuit chip U1 in the switching power supply circuit 102 controls an N-channel MOS tube Q2 to be rapidly switched on and off at the frequency of 40-60KHz, and meanwhile, the secondary side voltage of an isolation transformer T1 also oscillates at the same frequency rule; when the wall-control switch is turned off, the integrated circuit chip U1 stops working, accordingly, the N-channel MOS transistor Q2 stops conducting and turning off rapidly at the frequency of about 40-60KHz, and the secondary side voltage of the isolation transformer T1 stops oscillating. The main control circuit 105 receives the secondary side voltage waveform of the isolation transformer T1 fed back by the power failure detection circuit 104, and cyclically detects whether the voltage waveform within 100mS is continuously lost, so as to determine whether the power failure action is performed, that is, the wall control switch performs the disconnection action.
The light source circuit 103 comprises an LED-H (5000K) light source and an LED-L (2700K) light source, and four control modes are switched by adopting a wall control switch as follows:
the first mode is as follows: the 0-10V dimming controller adjusts the brightness output of the LED-H (5000K) light source;
and a second mode: a 0-10V dimming controller adjusts the brightness output of the LED-L (2700K) light source;
and a third mode: the 0-10V dimming controller adjusts the color temperature and the brightness output of the LED-H (5000K) + LED-L (2700K) light source;
and a fourth mode: the 0-10V dimming controller adjusts the color temperature of the LED-H (5000K) + LED-L (2700K) light source, but the output current is constant;
the wall control switch is circularly switched to the next control mode within the preset time of 2 seconds, has a memory function, is switched off for more than 2 seconds, and is switched on to enter the last control mode before the switching off.
Therefore, the wall control mode switching function is realized by monitoring the secondary side voltage waveform of the isolation transformer T1 by adopting the power failure detection technology, the effects of realizing independent dimming, independent color mixing and synchronous dimming color mixing of wall control switching are achieved, and the diversified demands of users are greatly met.
To sum up, the embodiment of the utility model provides a pair of adjust luminance mixing of colors circuit and illumination lamps and lanterns, including dimming circuit, switching power supply circuit, fall electric detection circuit and master control circuit, the alternating current signal conversion of power supply electric wire netting output through switching power supply circuit is direct current signal, in order to supply power to the light source circuit, and master control circuit detects switching power supply circuit according to falling electric detection circuit and whether falls the electricity, switch the control mode to the light source circuit, while master control circuit is according to the adjustting of the lighteness signal of dimming circuit output, adjust the electric current of flowing through the light source circuit, the effect of the mixing of colors of adjusting luminance has been realized simultaneously. Adopt the switching mode to reach the effect of adjusting luminance alone, mixing of colors alone and synchronous dimming mixing of colors from this, greatly satisfied user's diversified demand, solved current lamps and lanterns lighting technology and had or can only adjust luminance, or can only mix colors, lead to the flexibility lower and user experience to feel relatively poor problem.
The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and the technical details such as the power-down detection circuit, the power-down cycle detection period, the power-down judgment logic, etc. can be properly adjusted and evolved according to the actual product development requirements; the function realization that order, mode quantity and the mode that the mode switches correspond can also carry out appropriate adjustment evolution according to actual product development demand and all belong to the utility model discloses a protection scope.
Claims (10)
1. A dimming and toning circuit, comprising:
a dimming circuit for outputting a brightness adjustment signal;
the switch power supply circuit is used for accessing a power supply grid, converting an alternating current signal output by the power supply grid into a direct current signal and then supplying power to the light source circuit;
the power failure detection circuit is connected with the switching power supply circuit and used for detecting whether the switching power supply circuit is powered down or not so as to output a detection signal, and the power failure detection circuit is powered up and redetected within a preset time after the power failure; and
and the master control circuit is connected with the dimming circuit, the switching power supply circuit and the power failure detection circuit, and is used for switching a control mode of the light source circuit according to the detection signal and regulating current flowing through the light source circuit according to the brightness regulation signal, wherein the control mode comprises a dimming mode, a color mixing mode and a dimming and color mixing mode.
2. The dimming and toning circuit of claim 1, wherein the dimming circuit comprises:
a seventh diode, a thirteenth diode, a fourteenth diode, a seventeenth diode, a third switching tube, a seventh switching tube, an eleventh switching tube, a twelfth switching tube, a thermistor, a twenty-ninth resistor, a thirty-fifth resistor, a thirty-ninth resistor, a forty-fourth resistor, a forty-first resistor, a forty-second resistor, a forty-third resistor, a forty-seventh resistor, a twenty-third capacitor, a twenty-fifth capacitor and a twenty-sixth capacitor;
a cathode of the seventeenth diode is connected to the 0-10V dimming controller, an anode of the seventeenth diode is connected to the first end of the thirty-fifth resistor, the second end of the thirty-fifth resistor, the first end of the forty-seventh resistor, a cathode of the thirteenth diode and an output end of the twelfth switching tube, the second end of the forty-seventh resistor is connected to the first end of the forty-second resistor and the first end of the twenty-sixth capacitor, an anode of the thirteenth diode is connected to the second end of the forty-second resistor and the second end of the twenty-sixth capacitor, a controlled end of the twelfth switching tube is connected to the output end of the eleventh switching tube and the first end of the thirty-ninth resistor, a second end of the thirty-ninth resistor is connected to the ground, and an input end of the twelfth switching tube is connected to the controlled end of the eleventh switching tube and the first end of the forty-second resistor, the second end of the forty-first resistor, the input end of the eleventh switch tube, the output end of the third switch tube, the first end of the twenty-third capacitor and the input end of the seventh switch tube are connected in common, the controlled end of the seventh switch tube, the second end of the twenty-third capacitor and the anode of the seventh diode are grounded, the controlled end of the third switch tube, the first end of the twenty-ninth resistor and the cathode of the seventh diode are connected in common, the input end of the third switch tube, the second end of the twenty-ninth resistor and the first end of the forty-third resistor are connected in common, the second end of the forty-third resistor is connected to the cathode of the fourteenth diode, the output end of the seventh switch tube is connected to the first end of the forty-first resistor, and the second end of the forty-first resistor is connected to the first end of the thermistor and the first end of the twenty-fifth capacitor in common, and the second end of the thermistor and the second end of the twenty-fifth capacitor are grounded.
3. The dimming and toning circuit of claim 1, wherein the power down detection circuit comprises:
a nineteenth diode, a twenty-fifth diode, a fifteenth switching tube, a twenty-eighth capacitor, a thirty-first resistor, a seventy-third resistor, a seventy-fourth resistor, a seventy-fifth resistor and a seventy-sixth resistor;
an anode of the nineteenth diode is connected to the switching power supply circuit, a cathode of the nineteenth diode is connected to a first end of the seventy-third resistor, a second end of the seventy-third resistor, a first end of the seventy-fourth resistor, a first end of the twenty-eighth capacitor and a cathode of the twenty-fifth diode are connected in common, a second end of the seventy-fourth resistor and a second end of the twenty-eighth capacitor are grounded, an anode of the twenty-fifth diode is connected to a first end of the seventy-fifth resistor, a second end of the seventy-fifth resistor is connected to a first end of the seventy-sixth resistor and a controlled end of the fifteenth switching tube in common, an input end of the fifteenth switching tube is connected to the first end of the thirty-first resistor and the master control circuit in common, and a second end of the seventy-sixth resistor is connected to an output end of the fifteenth switching tube in ground, and the second end of the thirty-first resistor is connected with a reference voltage.
4. The dimming and toning circuit of claim 1, wherein the master control circuit comprises a single chip microcomputer.
5. The dimming and toning circuit of claim 1, wherein the switching power supply circuit comprises:
the device comprises an isolation transformer, an integrated circuit chip and a field effect tube;
the integrated circuit chip is respectively connected with the field effect transistor and the isolation transformer, and is used for correspondingly controlling the field effect transistor to be switched on and off at a preset frequency according to the switching on and switching off of the wall control switch, and the voltage of the secondary side coil of the isolation transformer is also oscillated at the preset frequency.
6. The dimming and toning circuit of claim 5, wherein the switching power supply circuit further comprises a rectification module, and the rectification module is used for rectifying an alternating current signal output by the power supply grid.
7. The dimming and toning circuit of claim 6, wherein the rectification module comprises a rectification bridge.
8. A lighting fixture comprising a light source circuit and further comprising the dimming and toning circuit of any one of claims 1-7.
9. The lighting fixture of claim 8 wherein the light source circuit comprises at least two light modules, wherein each light module comprises a series of LED lights connected in series.
10. The lighting fixture of claim 8 wherein the light source circuit comprises a first light emitting module and a second light emitting module;
the control mode comprises the steps of independently adjusting the brightness of the first path of light-emitting module, independently adjusting the brightness of the second path of light-emitting module, adjusting the color temperature of the first path of light-emitting module and the second path of light-emitting module, and simultaneously adjusting the color temperature and the brightness of the first path of light-emitting module and the second path of light-emitting module.
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| CN202021461440.4U CN212970165U (en) | 2020-07-22 | 2020-07-22 | Dimming and color mixing circuit and lighting lamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115426754A (en) * | 2022-10-08 | 2022-12-02 | 惠州市安规电子有限公司 | Switch multi-gear dimming and toning software control bottom layer logic circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115426754A (en) * | 2022-10-08 | 2022-12-02 | 惠州市安规电子有限公司 | Switch multi-gear dimming and toning software control bottom layer logic circuit |
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