CN218603688U - Dimming circuit and lamp - Google Patents
Dimming circuit and lamp Download PDFInfo
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- CN218603688U CN218603688U CN202220874923.XU CN202220874923U CN218603688U CN 218603688 U CN218603688 U CN 218603688U CN 202220874923 U CN202220874923 U CN 202220874923U CN 218603688 U CN218603688 U CN 218603688U
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Abstract
The application discloses a dimming circuit and a lamp, which comprise a driving chip, wherein the chip comprises a power input end and a signal input end, and the power input end is connected with a power end; the dimmer access end is used for being connected with a dimmer and comprises a signal positive end and a signal negative end, and the signal negative end is connected with the grounding end; the state adjusting circuit comprises a first diode, a second diode, a first resistor, a second resistor and a first transistor; when the dimmer is not connected, the first transistor and the second diode are cut off, and the first diode is conducted; when the dimmer is switched on, the first diode is cut off, and the first transistor and the second diode are conducted. According to the embodiment of the application, after the lamp is powered on, the wiring state of the lamp can be confirmed under the condition that the dimmer is not connected or the dimmer is not opened, the power of the lamp can be adjusted, and therefore the lamp is subjected to preliminary dimming.
Description
Technical Field
The application relates to the field of lighting equipment, in particular to a dimming circuit and a lamp.
Background
At present, most 1-10V lamps in the market cannot adjust the power of the lamps when the light modulator is not connected, so that the lamps are in the maximum brightness or the unlighted state, namely the states of the lamps cannot be changed according to requirements.
In an existing implementation manner, there is a dimming and color-mixing circuit based on a 0-10V dimmer, which includes a main control circuit connected to the 0-10V dimmer, a switching power supply circuit, and a power-down detection circuit, and configured to adjust a total current flowing through a light source circuit according to a dimming and color-mixing signal; and the current ratio of each path of light-emitting module is adjusted according to the detection signal so as to switch the adjustment mode of the light source circuit. The 0-10V dimmer regulates the current flowing through the light source circuit by using a voltage signal with the output voltage range of 0-10V so as to achieve the effect of dimming the light source circuit. The master control circuit adjusts the total current flowing through the light source circuit according to the dimming and color mixing signals output by the dimming circuit, and simultaneously detects whether the switching power supply circuit is powered down according to the power failure detection circuit so as to switch the adjusting mode of the light source circuit, thereby realizing the effect of dimming and color mixing at the same time. I.e. the light fixture needs to be dimmed using the dimmer.
However, in some scenarios where the light fixtures need to be installed separately from the dimmer, the dimmer needs to be accessed after the light fixture wiring installation is complete. In the prior art of this scenario, most of the lamps do not operate when they do not access the dimmer, so that the lamps cannot confirm the installation and wiring conditions of the lamps when they do not access the dimmer.
SUMMERY OF THE UTILITY MODEL
The application provides a dimming circuit and a lamp, in order to solve the technical problem that a corresponding technical scheme is not disclosed in the background art so as to adjust the state of the lamp which is not connected with a dimmer. This application can make lamps and lanterns need not to insert the instrument of adjusting luminance and can confirm its wiring state to can carry out continuous regulation to its power.
In this application a dimming circuit and lamps and lanterns, the circuit includes:
the driving chip comprises a power input end and a signal input end, and the power input end is connected with a power end;
the dimmer access end is used for being connected with a dimmer and comprises a signal positive end and a signal negative end, and the signal negative end is connected with the grounding end; and
the state adjusting circuit comprises a first diode, a second diode, a first resistor, a second resistor and a first transistor; one end of the first resistor is connected with a power supply end, the other end of the first resistor is connected with one end of the second resistor, and the other end of the second resistor is connected with a ground end;
the anode of the first diode is connected between the first resistor and the second resistor, and the cathode of the first diode is connected with the signal input end of the driving chip;
one end of the first transistor is connected between the first resistor and the second resistor, the other end of the first transistor is connected with a grounding end, and a controlled end of the first transistor is connected with a signal positive end of the dimmer access end;
the positive electrode of the second diode is connected between the controlled end of the first transistor and the signal positive electrode end of the dimmer access end, and the negative electrode of the second diode is connected with the signal input end of the driving chip;
when the dimmer is not connected, the first transistor and the second diode are cut off, and the first diode is conducted; when the dimmer is switched on, the first diode is cut off, and the first transistor and the second diode are conducted.
In an embodiment, the first resistor and/or the second resistor is a fixed resistor, an adjustable resistor or a potentiometer.
In an embodiment, the dimmer connection terminal further includes a first zener diode, an anode of the first zener diode is connected to the ground terminal, a cathode of the first zener diode is connected to a signal anode terminal of the dimmer connection terminal, and the first capacitor is connected in parallel to the first zener diode.
In an embodiment, the dimming circuit further includes a signal amplitude modulation circuit and a driving end, the driving chip includes a signal output end, an input end of the signal amplitude modulation circuit is connected with a signal output end of the driving chip, and an output end of the signal amplitude modulation circuit is connected with the driving end.
In one embodiment, the signal amplitude modulation circuit comprises a third resistor, a fourth resistor, a fifth resistor and a second transistor;
one end of the third resistor is connected with a power supply end, and the other end of the third resistor is connected with the output end of the signal amplitude modulation circuit;
one end of the second transistor is connected with the output end of the signal amplitude modulation circuit, the other end of the second transistor is connected with the grounding end, and the controlled end of the second transistor is connected with the signal output end of the driving chip;
one end of the fourth resistor is connected with the output end of the signal amplitude modulation circuit, and the other end of the fourth resistor is connected with the grounding end;
one end of the fifth resistor is connected with a power supply end, and the other end of the fifth resistor is connected with a controlled end of the second transistor;
the third resistor and/or the fourth resistor are/is a fixed-value resistor, an adjustable resistor or a potentiometer.
In one embodiment, the dimming circuit further comprises a voltage stabilizing circuit, and the voltage stabilizing circuit is arranged between the power supply end and the state regulating circuit.
In one embodiment, the voltage regulator circuit is a three-terminal voltage regulator circuit.
In one embodiment, the voltage stabilizing circuit is further arranged between the power supply end and the signal amplitude modulation circuit.
In an embodiment, the first transistor and the second transistor are transistors or field effect transistors.
In one embodiment, the power source terminal is a dc voltage source.
The application also discloses a lamp, which comprises the dimming circuit.
Therefore, the dimming circuit and the lamp can select one of the state adjusting circuit or the dimmer access end to be conducted with the driving chip by setting the state adjusting circuit and utilizing the conduction or the cut-off of the transistor and the diode in the circuit, so that when the dimmer is not connected to the lamp or the dimmer is not opened, the lamp can adjust the power state of the driving chip through the state adjusting circuit and normally work, and the installation wiring condition of the lamp can be conveniently confirmed before the dimmer is not connected to the lamp.
Drawings
Fig. 1 is a schematic structural diagram of a dimming circuit according to an embodiment of the present application.
Fig. 2 is another schematic structural diagram of a dimming circuit according to an embodiment of the present disclosure.
Fig. 3 is a schematic diagram of another structure of a dimming circuit according to an embodiment of the present disclosure.
Fig. 4 is a schematic structural diagram of a lamp provided in the embodiment of the present application.
Detailed Description
Preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present application will be more readily understood by those skilled in the art, and the scope of the present application will be more clearly defined.
Referring to the drawings, wherein like reference numbers refer to like elements, the principles of the present application are illustrated as being implemented in a suitable computing environment. The following description is based on illustrated embodiments of the application and should not be taken as limiting the application with respect to other embodiments that are not detailed herein.
The term "module" as used herein may be a software or hardware object that executes on the computing system. The different components, modules, engines, and services described herein may be implementation objects on the computing system. The apparatus and method described herein may be implemented in software, but may also be implemented in hardware, and are within the scope of the present application.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically, electrically or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
Referring to fig. 1, fig. 1 shows a structure of a dimming circuit according to an embodiment of the present disclosure.
As shown in fig. 1, in an embodiment, the dimming circuit includes a power source terminal 10, a state adjusting circuit 2, a driving chip 4, and a dimmer access terminal 5. The power source terminal 10 supplies power to the circuit, the circuit driving chip 4, and the state adjustment circuit 2.
The driving chip 4 includes a power input terminal, a signal input terminal and a signal output terminal, and the power input terminal is connected to the power source terminal 10. Specifically, the driving chip 4 receives the dimming signal from the dimmer or the state adjusting circuit 2 through a signal input end thereof, and outputs a driving signal through a signal output end thereof, so as to drive the lamp 6.
The dimmer access terminal 5 is used for being connected with a dimmer and comprises a signal positive terminal and a signal negative terminal, and the signal negative terminal is connected with a grounding terminal. Specifically, the dimmer incoming end 5 is detachably connected with the dimmer, and when the dimmer is required to be connected, the positive terminal and the negative terminal of the dimmer are correspondingly connected with the signal positive terminal and the signal negative terminal of the dimmer incoming end 5, so that an external dimming tool can be connected into the dimming circuit 1 of the embodiment.
The state adjusting circuit 2 includes a first diode D1, a second diode D2, a first resistor R1, a second resistor R2, and a first transistor Q1.
One end of the first resistor R1 is connected to the power supply terminal 10, the other end of the first resistor R1 is connected to one end of the second resistor R2, and the other end of the second resistor R2 is connected to the ground, that is, the first resistor R1 is connected to the second resistor R2 in series.
The anode of the first diode D1 is connected between the first resistor R1 and the second resistor R2, and the cathode of the first diode D1 is connected to the signal input terminal of the driving chip 4.
Specifically, the voltage from the power supply terminal 10 is divided by the first resistor R1 and the second resistor R2, and then the divided voltage is input to the signal input terminal of the driving chip 4 through the first diode D1, so as to adjust the state of the lamp.
The first transistor Q1 is exemplified by a triode, a collector of the first transistor Q1 is connected between the first resistor R1 and the second resistor R2, an emitter of the first transistor Q1 is connected to a ground terminal, a controlled terminal of the first transistor Q1 is a base, and the base is connected to a signal positive terminal of the dimmer connection terminal 5. In other embodiments, the first transistor Q1 is not limited to a triode, and may be replaced with another switching device according to actual needs, for example, a field effect transistor.
The anode of the second diode D2 is connected between the controlled end of the first transistor Q1 and the signal anode of the dimmer input end 5, and the cathode of the second diode D2 is connected to the signal input end of the driving chip 4. Specifically, the first diode D1 and the second diode D2 can play a certain filtering role and also have a control role of one-way conduction, so that power input is protected.
In this embodiment, when the dimmer is not turned on or the dimmer connection terminal 5 is not connected to the dimmer, the potential of the positive terminal of the signal of the dimmer connection terminal 5 is zero, so the first transistor Q1 and the second diode D2 are turned off, the first diode D1 is turned on, at this time, the signal input to the signal input terminal of the driving chip 4 is related to the state adjustment circuit 2, that is, the ratio between the first resistor R1 and the second resistor R2 is large or small, so that the voltage input to the driving chip 4 is adjustable, and the output brightness state of the driving chip 4 is adjustable when the lamp is not connected to the dimmer. In other embodiments, the second resistor R2 may be set as a variable resistor or a sliding rheostat, so as to achieve the adjustable brightness of the lamp without a dimmer.
When the dimmer access terminal 5 is connected to the dimmer and the dimmer is turned on, the signal positive terminal of the dimmer access terminal 5 has a high level input, the first transistor Q1 is turned on, so that the anode of the first diode D1 is grounded, the first diode D1 is turned off, and the second diode D2 is turned on. At this time, the dimming signal generated by the dimmer is transmitted to the driving chip 4 through the dimmer inlet 5, that is, the dimming signal generated by the dimmer is transmitted to the driving chip 4 through the signal positive terminal of the dimmer inlet 5, the second diode D2, and the signal input terminal of the driving chip 4, so as to dim the lamp 6.
The embodiment realizes that in some scenes that the lamp needs to be installed separately from the dimmer, when the lamp does not access the dimmer or the dimmer is not opened, the lamp state can be adjusted, and the wiring state of the lamp can be confirmed.
Referring to fig. 2 and fig. 3, fig. 2 shows another structure of a dimming circuit according to an embodiment of the present disclosure, and fig. 3 shows a dimming circuit according to an embodiment of the present disclosure.
As shown in fig. 2 and fig. 3, in an embodiment, the dimmer connection terminal 5 further includes a first zener diode ZD1 and a first capacitor C1, an anode of the first zener diode ZD1 is connected to the ground terminal, a cathode of the first zener diode ZD1 is connected to the signal positive terminal of the dimmer connection terminal 5, and the first capacitor C1 is connected in parallel to the first zener diode ZD 1. The dimming signal generated by the dimmer passes through the first capacitor C1 and the first zener diode ZD1, so that the dimming signal received by the signal input terminal of the driving chip 4 is stable.
In this embodiment, the dimming circuit further includes a signal amplitude modulation circuit 30 and a driving terminal 31, the driving chip 4 includes a signal output terminal, an input terminal of the signal amplitude modulation circuit 30 is connected to the signal output terminal of the driving chip 4, and an output terminal of the signal amplitude modulation circuit 30 is connected to the driving terminal 31.
The signal amplitude modulation circuit 30 includes a third resistor R3, a fourth resistor R4, a fifth resistor R5, and a second transistor Q2.
One end of the third resistor R3 is connected to the power source terminal 10, and the other end is connected to the output terminal of the signal amplitude modulation circuit 30.
One end of the second transistor Q2 is connected to the output end of the signal amplitude modulation circuit 30, the other end is connected to the ground end, and the controlled end of the second transistor Q2 is connected to the signal output end of the driving chip 4.
One end of the fourth resistor R4 is connected to the output end of the signal amplitude modulation circuit 30, and the other end is connected to the ground end.
The fifth resistor R5 has one end connected to the power source terminal 10 and the other end connected to the controlled terminal of the second transistor Q2.
Specifically, the fifth resistor R5 is a pull-up resistor for the driving signal, and is used for increasing the driving capability of the driving signal; the third resistor R3 and the fourth resistor R4 divide the voltage from the power source terminal 10 to set the amplitude of the driving signal of the driving terminal 31.
In the present embodiment, after the signal input terminal of the signal amplitude modulation circuit 30 receives the driving signal output by the signal output terminal of the driving chip 4, the driving signal is output to the driving terminal 31 in an inverted state through the output terminal of the signal amplitude modulation circuit 30 by the on/off state of the triode, so as to drive the lamp 6.
In the present embodiment, the dimming circuit further includes a voltage stabilizing circuit 11, the voltage stabilizing circuit 11 is disposed between the power source terminal 10 and the state adjusting circuit 2, and meanwhile, the voltage stabilizing circuit 11 is further disposed between the power source terminal 10 and the signal amplitude modulation circuit 30.
Referring to fig. 3, in an embodiment, the voltage regulator circuit is a three-terminal voltage regulator circuit, and includes a third transistor Q3, a sixth resistor R6, a second capacitor EC1, a third capacitor EC2, and a second zener diode ZD2.
One end of the third transistor Q3 is connected to the power source terminal 10, the other end is connected to the state adjusting circuit 2 and is connected to the circuit 30, the controlled terminal of the third transistor Q3 is connected to the cathode of the second zener diode ZD2, and the other end of the second zener diode ZD2 is connected to the ground terminal.
The sixth resistor R6 has one end connected to the power source terminal 10 and the other end connected to the controlled terminal of the third transistor Q3.
One end of the second capacitor EC1 is connected to the power supply terminal 10, and the other end is connected to the ground terminal.
One end of the third capacitor EC2 is connected to the state adjustment circuit 2 and to the signal amplitude modulation circuit 30, and the other end is connected to the ground.
In this embodiment, the second capacitor EC1 and the third capacitor EC2 are used to filter the power source end 10, so as to filter out other waveform components of the input power source, and avoid the influence of noise on the effect of the dimming circuit, thereby improving the working stability of the lighting device. Specifically, the second capacitor EC1 and the third capacitor EC2 are polar capacitors, and in one implementation, the second capacitor EC1 and the third capacitor EC2 are polar electrolytic capacitors.
In this embodiment, the third transistor Q3 is used to bias the second diode ZD2, and then output a constant voltage to the state adjusting circuit 2 and the signal amplitude modulation circuit 30.
In an embodiment, the first resistor R1 and/or the second resistor R2 is a fixed resistor, an adjustable resistor or a potentiometer. The continuous adjustment of the magnitude of the voltage input to the signal input terminal of the driver chip 4 can be achieved within a certain range.
In an embodiment, the third resistor R3 and/or the fourth resistor R4 is a fixed resistor, an adjustable resistor, or a potentiometer. It is possible to achieve continuous adjustment of the magnitude of the drive signal of the drive terminal 31 within a certain range.
In one embodiment, the first transistor Q1, the second transistor Q2 and the third transistor Q3 are triodes or field effect transistors. In a preferred embodiment, the first transistor Q1, the second transistor Q2 and the third transistor Q3 are triodes.
As shown in fig. 4, the luminaire 6 may be a lighting device such as a ceiling lamp, a spot lamp, a table lamp, etc., and includes the dimming circuit 1 of the above embodiment. The lighting device may further include a housing, an LED light source, a power supply, and the like, so as to form a usable lamp together with the dimming circuit 1.
In some embodiments, LED loads with different specifications may be adopted according to actual needs, and accordingly, the specifications of the power supply terminal 10, the first zener diode ZD1, and the second zener diode ZD2 are not limited in this application.
The dimming circuit 1 may be the dimming circuit 1 described in any one of the embodiments of fig. 1 to 3, and the details thereof are not repeated herein.
According to the lamp, the state adjusting circuit is arranged, one of the connection ends of the state adjusting circuit or the light modulator can be selected to be connected with the driving chip by utilizing the connection or the disconnection of the transistor and the diode in the circuit, so that when the light modulator is not connected into the lamp or the light modulator is not opened, the power state of the driving chip is adjusted by the lamp through the state adjusting circuit and the driving chip can normally work, and therefore the installation wiring condition of the lamp can be conveniently confirmed before the light modulator is not connected into the lamp.
The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present application within the knowledge of those skilled in the art.
Claims (10)
1. A dimming circuit, the circuit comprising:
the driving chip comprises a power input end and a signal input end, and the power input end is connected with a power end;
the dimmer access end is used for being connected with a dimmer and comprises a signal positive end and a signal negative end, and the signal negative end is connected with the grounding end; and
the state adjusting circuit comprises a first diode, a second diode, a first resistor, a second resistor and a first transistor;
one end of the first resistor is connected with a power supply end, the other end of the first resistor is connected with one end of the second resistor, and the other end of the second resistor is connected with a ground end;
the anode of the first diode is connected between the first resistor and the second resistor, and the cathode of the first diode is connected with the signal input end of the driving chip;
one end of the first transistor is connected between the first resistor and the second resistor, the other end of the first transistor is connected with a grounding end, and a controlled end of the first transistor is connected with a signal positive end of the dimmer access end;
the positive electrode of the second diode is connected between the controlled end of the first transistor and the signal positive electrode end of the dimmer access end, and the negative electrode of the second diode is connected with the signal input end of the driving chip;
when the dimmer is not connected, the first transistor and the second diode are cut off, and the first diode is conducted; when the dimmer is switched on, the first diode is cut off, and the first transistor and the second diode are conducted.
2. A dimming circuit as claimed in claim 1, wherein: the first resistor and/or the second resistor are/is a fixed-value resistor, an adjustable resistor or a potentiometer.
3. A dimming circuit as claimed in claim 1, wherein: the dimmer access end further comprises a first voltage stabilizing diode and a first capacitor, the positive pole of the first voltage stabilizing diode is connected with the grounding end, the negative pole of the first voltage stabilizing diode is connected with the signal positive pole end of the dimmer access end, and the first capacitor is connected with the first voltage stabilizing diode in parallel.
4. A dimming circuit as claimed in claim 1, wherein: the dimming circuit further comprises a signal amplitude modulation circuit and a driving end, the driving chip comprises a signal output end, the input end of the signal amplitude modulation circuit is connected with the signal output end of the driving chip, and the output end of the signal amplitude modulation circuit is connected with the driving end.
5. A dimming circuit as claimed in claim 4, wherein: the signal amplitude modulation circuit comprises a third resistor, a fourth resistor, a fifth resistor and a second transistor;
one end of the third resistor is connected with a power supply end, and the other end of the third resistor is connected with the output end of the signal amplitude modulation circuit;
one end of the second transistor is connected with the output end of the signal amplitude modulation circuit, the other end of the second transistor is connected with the grounding end, and the controlled end of the second transistor is connected with the signal output end of the driving chip;
one end of the fourth resistor is connected with the output end of the signal amplitude modulation circuit, and the other end of the fourth resistor is connected with the grounding end;
one end of the fifth resistor is connected with a power supply end, and the other end of the fifth resistor is connected with a controlled end of the second transistor;
the third resistor and/or the fourth resistor are/is a fixed-value resistor, an adjustable resistor or a potentiometer.
6. A dimming circuit as claimed in claim 1, wherein: the dimming circuit further comprises a voltage stabilizing circuit, and the voltage stabilizing circuit is arranged between the power supply end and the state adjusting circuit.
7. A dimming circuit as claimed in claim 4, wherein: the dimming circuit further comprises a voltage stabilizing circuit, and the voltage stabilizing circuit is arranged between the power supply end and the signal amplitude modulation circuit.
8. A dimming circuit as claimed in claim 5, wherein: the first transistor and the second transistor are triodes or field effect transistors.
9. A dimming circuit as claimed in any one of claims 1 to 6, wherein: the power supply end is a direct current voltage source.
10. A luminaire characterized in that it comprises a dimming circuit as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220874923.XU CN218603688U (en) | 2022-04-08 | 2022-04-08 | Dimming circuit and lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220874923.XU CN218603688U (en) | 2022-04-08 | 2022-04-08 | Dimming circuit and lamp |
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| Publication Number | Publication Date |
|---|---|
| CN218603688U true CN218603688U (en) | 2023-03-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220874923.XU Active CN218603688U (en) | 2022-04-08 | 2022-04-08 | Dimming circuit and lamp |
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| CN (1) | CN218603688U (en) |
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- 2022-04-08 CN CN202220874923.XU patent/CN218603688U/en active Active
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