CN214544876U - Dimming control circuit and lamp - Google Patents
Dimming control circuit and lamp Download PDFInfo
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- CN214544876U CN214544876U CN202120431372.5U CN202120431372U CN214544876U CN 214544876 U CN214544876 U CN 214544876U CN 202120431372 U CN202120431372 U CN 202120431372U CN 214544876 U CN214544876 U CN 214544876U
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Abstract
A dimming control circuit and a lamp divide a first voltage to output a plurality of sampling voltages when the first voltage is connected through a voltage dividing circuit; the knob adjusting circuit is connected with the sampling voltage corresponding to the sensed first operation instruction and outputs dimming voltage according to the sampling voltage; the control circuit outputs a PWM signal according to the dimming voltage; the duty ratio of the PWM signal is in a linear relation with the dimming voltage; the first amplifying circuit filters the PWM signal into a regulated voltage and amplifies the regulated voltage; the dimming power supply outputs a driving current according to the amplified regulated voltage to light the light-emitting circuit; the driving current is in a linear relation with the duty ratio of the PWM signal; therefore, the compatibility, reliability and precision of dimming when the current of the dimming control circuit is large or the wiring is too long are improved.
Description
Technical Field
The application belongs to the field of adjusting luminance, especially relates to a control circuit and lamps and lanterns adjust luminance.
Background
The traditional dimming control circuit comprises a knob adjusting circuit and a dimming power supply, wherein the knob adjusting circuit outputs dimming voltage according to a sensed first operation instruction; the dimming power supply outputs a driving current according to the dimming voltage to light the light emitting component.
Because the traditional dimming control circuit directly realizes the dimming function through the knob adjusting circuit, the compatibility is poor, and the dimming precision and reliability can be influenced when the current is large or the wiring is too long.
SUMMERY OF THE UTILITY MODEL
The application aims to provide a dimming control circuit and a lamp, and aims to overcome the defects that the compatibility of the traditional dimming control circuit is poor, and the dimming precision and the reliability are poor when the current is large or the wiring is too long.
The embodiment of the application provides a dimming control circuit, includes:
a voltage dividing circuit configured to divide a first voltage to output a plurality of sampling voltages when the first voltage is accessed;
the knob adjusting circuit is connected with the voltage division circuit and is configured to access the sampling voltage corresponding to the sensed first operation instruction and output dimming voltage according to the sampling voltage;
the control circuit is connected with the knob adjusting circuit and is configured to output a PWM signal according to the dimming voltage; wherein the duty cycle of the PWM signal is linear with the dimming voltage;
the first amplifying circuit is connected with the control circuit and is configured to filter the PWM signal into a regulated voltage and amplify the regulated voltage;
the dimming power supply is connected with the first amplifying circuit and is configured to output a driving current according to the amplified stabilized voltage so as to light a light-emitting circuit; wherein the driving current is linear with a duty ratio of the PWM signal.
In one embodiment, the method further comprises the following steps:
the first knob signal generator is connected with the control circuit and is configured to output a first knob voltage according to the sensed second operation instruction;
the control circuit is specifically configured to output the PWM signal for a preset duration according to the first knob voltage and the dimming voltage; the preset duration and the first knob voltage are in a linear relation.
In one embodiment, the method further comprises the following steps:
a second amplification circuit configured to amplify the first voltage to output a second voltage;
the dimmer is connected with the second amplifying circuit and is configured to regulate the second voltage according to a sensed third operation instruction;
a sampling circuit connected to the control circuit, the second amplifying circuit and the dimmer, and configured to sample the adjusted second voltage to output a detection voltage;
the control circuit is specifically configured to output the PWM signal according to the detection voltage and the dimming voltage; the duty ratio of the PWM signal is linear with both the detection voltage and the dimming voltage.
In one embodiment, the method further comprises the following steps:
the second knob signal generator is connected with the control circuit and is configured to output an encoder signal according to a sensed fourth operation instruction;
the control circuit is specifically configured to output the PWM signal according to the encoder signal and the dimming voltage.
In one embodiment, the dimming control circuit further includes:
the controller is connected with the knob adjusting circuit and is configured to output an adjusting voltage according to the sensed fifth operation instruction;
the knob adjusting circuit is specifically configured to access the sampling voltage or the adjusting voltage corresponding to the sensed first operation instruction, and output a dimming voltage according to the accessed sampling voltage or the adjusting voltage.
In one embodiment, the dimming control circuit is connected with a terminal device;
the control circuit is further configured to output a first wired communication signal according to the dimming voltage;
the terminal device is configured to receive the first wired communication signal and respond in accordance with the first wired communication signal.
In one embodiment, the dimming control circuit further includes:
and the voltage stabilizing circuit is connected with the voltage dividing circuit and is configured to convert the input direct current into a first voltage.
In one embodiment, the knob adjusting circuit comprises a knob switch, a first resistor and a second resistor;
the first normally open contact of knob switch the second normally open contact of knob switch the third normally open contact of knob switch the fourth normally open contact of knob switch and the fifth normally open contact of knob switch is connected to jointly a plurality of sampling voltage output ends of knob regulating circuit, the sixth normally open contact of knob switch is connected to jointly knob regulating circuit's regulation signal input end, knob switch's common contact with the first end of first resistance is connected, the second end of first resistance with the first end of second resistance is connected to jointly knob regulating circuit's dimming voltage output end, the second end and the power ground of second resistance are connected.
In one embodiment, the control circuit comprises a microprocessor;
the power supply end of the microprocessor is connected to the first voltage input end of the control circuit, the UART signal sending end of the microprocessor is connected to the first wired communication signal output end of the control circuit, the UART signal receiving end of the microprocessor is connected to the second wired communication signal input end of the control circuit, the first general data input and output end of the microprocessor is connected to the dimming voltage input end of the control circuit, the second general data input and output end of the microprocessor is connected to the PWM signal output end of the control circuit, the third general data input and output end of the microprocessor is connected to the detection voltage input end of the control circuit, the fourth general data input and output end of the microprocessor is connected to the first knob voltage input end of the control circuit, and the fifth general data input and output end of the microprocessor and the sixth general data input and output end of the microprocessor are connected to the first voltage input end of the control circuit The ground terminal of the microprocessor is connected with the power ground.
The embodiment of the utility model provides a still provide a lamp, lamp includes:
the dimming control circuit as described above; and
the light emitting circuit is configured to emit light according to the driving current.
Compared with the prior art, the embodiment of the utility model beneficial effect who exists is: the control circuit outputs a PWM signal according to the dimming voltage; the first amplifying circuit filters the PWM signal into a regulated voltage and amplifies the regulated voltage; therefore, the compatibility of the dimming control circuit is improved through the conversion of the digital signal and the analog voltage signal, and the dimming reliability is improved when the current is larger or the wiring is too long; because the duty ratio of the PWM signal is in a linear relation with the dimming voltage, and the driving current is in a linear relation with the duty ratio of the PWM signal, the dimming precision of the dimming control circuit when the current is large or the wiring is too long is improved.
Drawings
In order to more clearly illustrate the technical utility model in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a dimming control circuit according to an embodiment of the present application;
fig. 2 is a schematic diagram of another structure of a dimming control circuit according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of another structure of a dimming control circuit according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of another structure of a dimming control circuit according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of another structure of a dimming control circuit according to an embodiment of the present disclosure;
fig. 6 is a schematic diagram of another structure of a dimming control circuit according to an embodiment of the present disclosure;
fig. 7 is a schematic diagram of another structure of a dimming control circuit according to an embodiment of the present application;
fig. 8 is a schematic circuit diagram of an example of a dimming control circuit according to an embodiment of the present application.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application 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 present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Fig. 1 shows a schematic structure diagram of a dimming control circuit according to a preferred embodiment of the present application, and for convenience of description, only the parts related to the present embodiment are shown, and detailed descriptions are as follows:
the dimming control circuit 13 includes a voltage dividing circuit 11, a knob adjusting circuit 12, a control circuit 13, a first amplifying circuit 14, and a dimming power supply 15.
The voltage dividing circuit 11 is configured to divide the first voltage to output a plurality of sampling voltages when the first voltage is switched on.
And the knob adjusting circuit 12 is connected with the voltage dividing circuit 11, and is configured to access the sampling voltage corresponding to the sensed first operation instruction and output the dimming voltage according to the sampling voltage.
A control circuit 13 connected to the knob adjusting circuit 12 and configured to output a Pulse Width Modulation (PWM) signal according to the dimming voltage; wherein, the duty ratio of the PWM signal is in a linear relation with the dimming voltage.
And a first amplifying circuit 14 connected to the control circuit 13 and configured to filter the PWM signal into a regulated voltage and amplify the regulated voltage.
A dimming power supply 15 connected to the first amplification circuit 14 and configured to output a driving current according to the amplified regulated voltage to light the light emitting circuit; wherein, the driving current is in linear relation with the duty ratio of the PWM signal.
As shown in fig. 2, the dimming control circuit 13 further includes a first knob signal generator 16.
And a first knob signal generator 16 connected to the control circuit 13 and configured to output a first knob voltage according to the sensed second operation command.
The control circuit 13 is specifically configured to output a PWM signal of a preset duration according to the first knob voltage and the dimming voltage; the preset time length and the first knob voltage are in a linear relation.
The first knob signal generator 16 receives the second operation instruction and outputs the first knob voltage, and the control circuit 13 outputs the PWM signal of the preset duration linearly related to the first knob voltage, thereby implementing the timing function of the dimming control circuit 13.
As shown in fig. 3, the dimming control circuit 13 further includes a second amplifying circuit 17, a dimmer 18, and a sampling circuit 19.
The second amplification circuit 17 is configured to amplify the first voltage to output a second voltage.
And a dimmer 18 connected to the second amplifying circuit 17 and configured to adjust the second voltage according to the sensed third operation command.
And a sampling circuit 19 connected to the control circuit 13, the second amplifying circuit 17 and the dimmer 18, and configured to sample the adjusted second voltage to output a detection voltage.
The control circuit 13 is specifically configured to output a PWM signal according to the detection voltage and the dimming voltage; the duty ratio of the PWM signal is linear with both the detection voltage and the dimming voltage.
The second voltage is adjusted through the light modulator 18, the sampling circuit 19 samples the adjusted second voltage, and the control circuit 13 outputs a PWM signal with a duty ratio in linear relation with both the detection voltage and the dimming voltage, so that the maximum brightness is set through the knob adjusting circuit 12, continuous dimming is performed within the maximum brightness through the light modulator 18, and the functions of the product are enriched; the problem that the traditional dimming control circuit cannot be connected with a dimmer to conduct dimming after the power gear is adjusted is solved.
As shown in fig. 4, the dimming control circuit 13 further includes a second knob signal generator 20.
A second knob signal generator 20 connected to the control circuit 13 and configured to output an encoder signal according to the sensed fourth operation instruction; the second knob signal generator 20 may be an encoder.
The control circuit 13 is specifically configured to output a PWM signal according to the encoder signal and the dimming voltage.
The encoder signal is output through the second knob signal generator 20, the maximum brightness is set through the knob adjusting circuit 12, and continuous dimming is performed within the maximum brightness through the second knob signal generator 20, so that the stepless dimming function of the dimming control circuit 13 is realized.
As shown in fig. 5, the dimming control circuit 13 further includes a controller 21.
And the controller 21 is connected with the knob adjusting circuit 12 and is configured to output an adjusting voltage according to the sensed fifth operation instruction.
The knob adjusting circuit 12 is specifically configured to access a sampling voltage or an adjusting voltage corresponding to the sensed first operation instruction, and output a dimming voltage according to the accessed sampling voltage or the adjusting voltage.
Dimming is carried out through the controller 21, and the controller 21 can be a 0-10V controller, so that stepless dimming is realized; the problem that the traditional dimming control circuit cannot be externally connected with a controller to adjust the dimming after the power gear is adjusted is solved.
As shown in fig. 6, the dimming control circuit 13 is connected to the terminal device 22.
The control circuit 13 is further configured to output a first wired communication signal according to the dimming voltage.
The terminal device 22 is configured to receive the first wired communication signal and respond in accordance with the first wired communication signal.
The terminal device 22 responding according to the first wired communication signal may specifically be: the terminal device 22 performs display, volume adjustment, and/or dimming according to the first wired communication signal.
The dimming control circuit 13 is connected with the terminal equipment 22, so that the function of controlling the terminal equipment 22 is expanded, and the application function of the product is enriched.
As shown in fig. 7, the dimming control circuit 13 further includes a voltage regulator circuit 23.
The voltage stabilizing circuit 23 is connected to the voltage dividing circuit 11 and configured to convert the input dc power into a first voltage.
The stability of the first voltage is improved by the voltage stabilizing circuit 23, thereby improving the reliability of the dimming control circuit 13.
Fig. 8 shows an example circuit structure of the dimming control circuit 13 according to an embodiment of the present invention, and for convenience of description, only the parts related to the embodiment of the present invention are shown, and detailed descriptions are as follows:
the knob adjusting circuit 12 comprises a knob switch S1, a first resistor R1 and a second resistor R2;
the first normally open contact of the knob switch S1, the second normally open contact of the knob switch S1, the third normally open contact of the knob switch S1, the fourth normally open contact of the knob switch S1 and the fifth normally open contact of the knob switch S1 are commonly connected to a plurality of sampling voltage output ends of the knob adjusting circuit 12, the sixth normally open contact of the knob switch S1 is commonly connected to an adjusting signal input end of the knob adjusting circuit 12, the common contact of the knob switch S1 is connected with the first end of the first resistor R1, the second end of the first resistor R1 and the first end of the second resistor R2 are commonly connected to a dimming voltage output end of the knob adjusting circuit 12, and the second end of the second resistor R2 is connected with a power ground.
The knob adjusting circuit 12 is realized by a knob switch, and can realize the output of multi-gear dimming voltage, thereby realizing the flexible switching of the power gear of the dimming control circuit 13.
The control circuit 13 includes a microprocessor U1;
a power supply terminal VDD of the microprocessor U1 is connected to a first voltage input terminal of the control circuit 13, a signal transmitting terminal TXD of an Asynchronous Receiver Transmitter (UART) of the microprocessor U1 is connected to a first wired communication signal output terminal of the control circuit 13, a signal receiving terminal RXD of the UART of the microprocessor U1 is connected to a second wired communication signal input terminal of the control circuit 13, a first general-purpose data input/output terminal P2.0 of the microprocessor U1 is connected to a dimming voltage input terminal of the control circuit 13, a second general-purpose data input/output terminal P2.7 of the microprocessor U1 is connected to a PWM signal output terminal of the control circuit 13, a third general-purpose data input/output terminal P2.1 of the microprocessor U1 is connected to a detection voltage input terminal of the control circuit 13, a fourth general-purpose data input/output terminal P2.3 of the microprocessor U1 is connected to a first knob voltage input terminal of the control circuit 13, a fifth general-purpose data input/output terminal P2.5 of the microprocessor U1 and a sixth general-purpose data input/output terminal P1 of the microprocessor U1 The output end P2.6 is connected to the encoder signal input end of the control circuit 13, and the grounding end of the microprocessor is connected with the power ground.
The control circuit 13 detects the value of the dimming voltage through the microprocessor U1 and sets the duty ratio of the PWM signal according to the value, thereby implementing the dimming function.
The first amplifying circuit 14 includes a first operational amplifier U2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a first capacitor C1, a second capacitor C2, and a third capacitor C3.
An inverting input terminal of the first operational amplifier U2 is connected to a first terminal of the third resistor R3 and a first terminal of the fourth resistor R4, a non-inverting input terminal of the first operational amplifier U2 is connected to a first terminal of the sixth resistor R6 and a first terminal of the second capacitor C2, a second terminal of the sixth resistor R6 is connected to a first terminal of the first capacitor C1 and a first terminal of the fifth resistor R5, an output terminal of the first operational amplifier U2 is connected to a second terminal of the fourth resistor R4 and a first terminal of the seventh resistor R7, a second terminal of the seventh resistor R7 and a first terminal of the third capacitor C3 are commonly connected to an amplified regulated voltage output terminal of the first amplifying circuit 14, a second terminal of the fifth resistor R5 is connected to a PWM signal input terminal of the first amplifying circuit 14, and a second terminal of the first capacitor C1, a second terminal of the second capacitor C2 and a second terminal of the third capacitor C3 are commonly connected to a ground.
The PWM signal is filtered and amplified by the first operational amplifier U2 and its peripheral circuits, so that the voltage matching between the control circuit 13 and the dimming power supply 15 is realized.
The second amplifying circuit 17 includes a second operational amplifier U3, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, and a fourth capacitor C4;
a non-inverting input terminal of the second operational amplifier U3 is connected to a first terminal of the eighth resistor R8 and a first terminal of the ninth resistor R9, an inverting input terminal of the second operational amplifier U3 is connected to a first terminal of the tenth resistor R10 and a first terminal of the eleventh resistor R11, an output terminal of the second operational amplifier U3 is connected to a second terminal of the eleventh resistor R11 and a first terminal of the twelfth resistor R12, a second terminal of the twelfth resistor R12 and a first terminal of the fourth capacitor C4 are commonly connected to a second voltage output terminal of the second amplifying circuit 17, a second terminal of the eighth resistor R8 is connected to a first voltage input terminal of the second amplifying circuit 17, and a second terminal of the ninth resistor R9, a second terminal of the tenth resistor R10 and a second terminal of the fourth capacitor C4 are commonly connected to the power ground.
The second amplifying circuit 17 has the advantage of simple and reliable circuitry.
The sampling circuit 19 comprises a thirteenth resistor R13 and a fourteenth resistor R14; a first end of the thirteenth resistor R13 is connected to the adjusted second voltage input terminal of the sampling circuit 19, a second end of the thirteenth resistor R13 and a first end of the fourteenth resistor R14 are connected to the detection voltage input terminal of the sampling circuit 19, and a second end of the fourteenth resistor R14 is connected to the power ground.
The voltage divider circuit 11 includes a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a twenty-first resistor R21, a twenty-second resistor R22, a twenty-third resistor R23, and a twenty-fourth resistor R24.
The description of fig. 8 is further described below in conjunction with the working principle:
the fifteenth resistor R15 to the twenty-fourth resistor R24 form 5 voltage dividing assemblies and divide the first voltage respectively to output 5 sampling voltages which are output to the first normally open contact of the knob switch S1 to the fifth normally open contact of the knob switch S1; the controller 21 outputs the regulated voltage to the sixth normally open contact of the knob switch S1; the knob switch S1 receives the first operation command, and switches in the sampling voltage or the adjustment voltage corresponding to the sensed first operation command, and outputs the dimming voltage to the first universal data input/output terminal P2.0 of the microprocessor U1 according to the switched-in sampling voltage or the adjustment voltage.
The first knob signal generator 16 outputs the first knob voltage to the fourth universal data input/output end P2.3 of the microprocessor U1 according to the sensed second operation instruction;
in one embodiment, the dimming control circuit 13 may have two cases.
In the first case, the second amplification circuit 17, the dimmer 18, and the sampling circuit 19 are selectively configured; without the second knob signal generator 20. At this time, the second operational amplifier U3 and its peripheral circuits amplify the first voltage to output a second voltage, which is adjusted by the dimmer 18 according to the sensed third operation instruction; the thirteenth resistor R13 and the fourteenth resistor R14 sample the adjusted second voltage to output a detection voltage to a third general data input/output terminal P2.1 of the microprocessor U1; the microprocessor U1 outputs a PWM signal and a first wired communication signal with preset duration according to the detection voltage, the first knob voltage and the dimming voltage; the preset time length and the first knob voltage are in a linear relation; the duty ratio of the PWM signal is linear with the detection voltage and the dimming voltage.
In the second case, the second knob signal generator 20 is selectively configured without the second amplification circuit 17, the dimmer 18, and the sampling circuit 19. At this time, the second knob signal generator 20 outputs encoder signals to the fifth general data input/output terminal P2.5 of the microprocessor U1 and the sixth general data input/output terminal P2.6 of the microprocessor U1 according to the sensed fourth operation command; the microprocessor U1 outputs a PWM signal and a first wired communication signal based on the encoder signal and the dimming voltage.
The first capacitor C1, the second capacitor C2, the fifth resistor R5 and the sixth resistor R6 filter the PWM signal to generate a regulated voltage, and the first operational amplifier U2 and its peripheral circuits amplify the regulated voltage; the dimming power supply 15 outputs a driving current according to the amplified regulated voltage to light the light emitting circuit; wherein, the driving current is in linear relation with the duty ratio of the PWM signal.
The first wired communication signal is transmitted from the UART signal transmitting terminal TXD of the microprocessor U1 to the terminal device 22, and the terminal device 22 is configured to respond according to the first wired communication signal.
The embodiment of the utility model provides a still provide a lamp, lamp includes:
as with the dimming control circuit and the light emitting circuit described above, the light emitting element is configured to emit light according to the driving current.
The embodiment of the utility model provides a when inserting first voltage through bleeder circuit, divide the voltage to output a plurality of sampling voltages to first voltage; the knob adjusting circuit is connected with the sampling voltage corresponding to the sensed first operation instruction and outputs dimming voltage according to the sampling voltage; the control circuit outputs a PWM signal according to the dimming voltage; the duty ratio of the PWM signal is in a linear relation with the dimming voltage; the first amplifying circuit filters the PWM signal into a regulated voltage and amplifies the regulated voltage; the dimming power supply outputs a driving current according to the amplified regulated voltage to light the light-emitting circuit; the driving current is in a linear relation with the duty ratio of the PWM signal; the control circuit outputs a PWM signal according to the dimming voltage; the first amplifying circuit filters the PWM signal into a regulated voltage and amplifies the regulated voltage; therefore, the compatibility of the dimming control circuit is improved through the conversion of the digital signal and the analog voltage signal, and the dimming reliability is improved when the current is larger or the wiring is too long; because the duty ratio of the PWM signal is in a linear relation with the dimming voltage, and the driving current is in a linear relation with the duty ratio of the PWM signal, the dimming precision of the dimming control circuit when the current is large or the wiring is too long is improved.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A dimming control circuit, comprising:
a voltage dividing circuit configured to divide a first voltage to output a plurality of sampling voltages when the first voltage is accessed;
the knob adjusting circuit is connected with the voltage division circuit and is configured to access the sampling voltage corresponding to the sensed first operation instruction and output dimming voltage according to the sampling voltage;
the control circuit is connected with the knob adjusting circuit and is configured to output a PWM signal according to the dimming voltage; wherein the duty cycle of the PWM signal is linear with the dimming voltage;
the first amplifying circuit is connected with the control circuit and is configured to filter the PWM signal into a regulated voltage and amplify the regulated voltage;
the dimming power supply is connected with the first amplifying circuit and is configured to output a driving current according to the amplified stabilized voltage so as to light a light-emitting circuit; wherein the driving current is linear with a duty ratio of the PWM signal.
2. The dimming control circuit of claim 1, further comprising:
the first knob signal generator is connected with the control circuit and is configured to output a first knob voltage according to the sensed second operation instruction;
the control circuit is specifically configured to output the PWM signal for a preset duration according to the first knob voltage and the dimming voltage; the preset duration and the first knob voltage are in a linear relation.
3. The dimming control circuit of claim 1, further comprising:
a second amplification circuit configured to amplify the first voltage to output a second voltage;
the dimmer is connected with the second amplifying circuit and is configured to regulate the second voltage according to a sensed third operation instruction;
a sampling circuit connected to the control circuit, the second amplifying circuit and the dimmer, and configured to sample the adjusted second voltage to output a detection voltage;
the control circuit is specifically configured to output the PWM signal according to the detection voltage and the dimming voltage; the duty ratio of the PWM signal is linear with both the detection voltage and the dimming voltage.
4. The dimming control circuit of claim 1, further comprising:
the second knob signal generator is connected with the control circuit and is configured to output an encoder signal according to a sensed fourth operation instruction;
the control circuit is specifically configured to output the PWM signal according to the encoder signal and the dimming voltage.
5. The dimming control circuit of claim 1, further comprising:
the controller is connected with the knob adjusting circuit and is configured to output an adjusting voltage according to the sensed fifth operation instruction;
the knob adjusting circuit is specifically configured to access the sampling voltage or the adjusting voltage corresponding to the sensed first operation instruction, and output a dimming voltage according to the accessed sampling voltage or the adjusting voltage.
6. The dimming control circuit of claim 1, wherein the dimming control circuit is connected to a terminal device;
the control circuit is further configured to output a first wired communication signal according to the dimming voltage;
the terminal device is configured to receive the first wired communication signal and respond in accordance with the first wired communication signal.
7. The dimming control circuit of claim 1, further comprising:
and the voltage stabilizing circuit is connected with the voltage dividing circuit and is configured to convert the input direct current into a first voltage.
8. The dimming control circuit of claim 1, wherein the knob adjustment circuit comprises a knob switch, a first resistor, and a second resistor;
the first normally open contact of knob switch the second normally open contact of knob switch the third normally open contact of knob switch the fourth normally open contact of knob switch and the fifth normally open contact of knob switch is connected to jointly a plurality of sampling voltage output ends of knob regulating circuit, the sixth normally open contact of knob switch is connected to jointly knob regulating circuit's regulation signal input end, knob switch's common contact with the first end of first resistance is connected, the second end of first resistance with the first end of second resistance is connected to jointly knob regulating circuit's dimming voltage output end, the second end and the power ground of second resistance are connected.
9. The dimming control circuit of claim 1, wherein the control circuit comprises a microprocessor;
the power supply end of the microprocessor is connected to the first voltage input end of the control circuit, the UART signal sending end of the microprocessor is connected to the first wired communication signal output end of the control circuit, the UART signal receiving end of the microprocessor is connected to the second wired communication signal input end of the control circuit, the first general data input and output end of the microprocessor is connected to the dimming voltage input end of the control circuit, the second general data input and output end of the microprocessor is connected to the PWM signal output end of the control circuit, the third general data input and output end of the microprocessor is connected to the detection voltage input end of the control circuit, the fourth general data input and output end of the microprocessor is connected to the first knob voltage input end of the control circuit, and the fifth general data input and output end of the microprocessor and the sixth general data input and output end of the microprocessor are connected to the first voltage input end of the control circuit The ground terminal of the microprocessor is connected with the power ground.
10. A light fixture, the light fixture comprising:
the dimming control circuit of any one of claims 1 to 9; and
the light emitting circuit is configured to emit light according to the driving current.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120431372.5U CN214544876U (en) | 2021-02-26 | 2021-02-26 | Dimming control circuit and lamp |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120431372.5U CN214544876U (en) | 2021-02-26 | 2021-02-26 | Dimming control circuit and lamp |
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| CN214544876U true CN214544876U (en) | 2021-10-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115783210A (en) * | 2022-11-28 | 2023-03-14 | 中国船舶集团有限公司第七〇八研究所 | Water jet propulsion handle controller |
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2021
- 2021-02-26 CN CN202120431372.5U patent/CN214544876U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115783210A (en) * | 2022-11-28 | 2023-03-14 | 中国船舶集团有限公司第七〇八研究所 | Water jet propulsion handle controller |
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