CN209824082U - Linear driving light-operated circuit with time delay function - Google Patents
Linear driving light-operated circuit with time delay function Download PDFInfo
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- CN209824082U CN209824082U CN201920046555.8U CN201920046555U CN209824082U CN 209824082 U CN209824082 U CN 209824082U CN 201920046555 U CN201920046555 U CN 201920046555U CN 209824082 U CN209824082 U CN 209824082U
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Abstract
The utility model discloses a linear driving light control circuit with time delay function, which comprises a LED load circuit, a rectifying circuit, a light control circuit, a voltage stabilizing circuit and a linear driving control circuit, wherein the rectifying circuit is used for rectifying the input alternating current into direct current to supply the direct current to the LED load circuit; the light control circuit comprises a photosensitive diode and a time delay circuit, wherein the photosensitive diode is used for detecting the intensity of external light and outputting a starting control signal or a closing control signal according to the detection result, and the time delay circuit is used for delaying the output of the closing control signal; the voltage circuit is used for providing stable working voltage for the light control circuit; the linear driving control circuit is used for correspondingly controlling the LED load circuit to be turned on or turned off according to the opening control signal or the closing control signal. The linear driving light control circuit has the light control function, and can avoid the problem that the lamp flickers back and forth at a critical place.
Description
Technical Field
The utility model relates to a technical field of LED illumination especially relates to a linear drive light control circuit who possesses time delay function.
Background
LED lighting fixtures have been widely used in today's society because of their advantages of high brightness, low power and long service life. The existing LED lighting lamp does not have the light control function, and the LED lighting lamp always keeps a lighting state in the daytime and at night, so that the great waste of electric energy is caused. In addition, the light control circuit on the market can flicker or flicker and convert for many times back and forth in unstable states at places where the light is in the junction of the day and the night, and the lamp reliability is poor.
Disclosure of Invention
The utility model aims to solve the technical problem that a linear drive light control circuit who possesses delay function is provided, and this linear drive light control circuit can also avoid lamps and lanterns to make a round trip the problem of scintillation in the critical place of illumination on the basis that possesses light control function.
In order to solve the technical problem, the utility model discloses a as follows technical scheme:
a linear driving light control circuit with a time delay function comprises an LED load circuit, a rectifying circuit, a light control circuit, a voltage stabilizing circuit and a linear driving control circuit, wherein the rectifying circuit is used for rectifying input alternating current into direct current to be supplied to the LED load circuit; the light control circuit comprises a photosensitive diode D2 and a time delay circuit, wherein the photosensitive diode D2 is used for detecting the intensity of external light and outputting an opening control signal or a closing control signal according to the detection result, and the time delay circuit is used for delaying the output of the closing control signal; the voltage circuit is used for providing stable working voltage for the light control circuit; and the linear driving control circuit is used for correspondingly controlling the LED load circuit to be turned on or turned off according to the opening control signal or the closing control signal.
Preferably, the delay circuit includes a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a diode D1, an MOS transistor Q2, and a transistor Q3, one end of the resistor R8 is connected to the output terminal of the voltage regulator circuit, the other end of the resistor R8 is connected to the cathode of the photodiode D8, one end of the resistor R8, the base of the transistor Q8, and the cathode of the diode D8, the anode of the photodiode D8, the other end of the resistor R8, and the emitter of the transistor Q8 are grounded, the collector of the transistor Q8 is connected to the output terminal of the voltage regulator circuit through the resistor R8, the anode of the diode D8 is connected to the linear driving control circuit through the resistor R8 and the resistor R8 in sequence, the gate of the MOS transistor Q8 is connected to a connection node between the collector of the transistor Q8 and the resistor R8 through the resistor R8, the source of the MOS transistor Q8 is grounded, and the drain of the MOS transistor, The connection node between the resistors R4.
Preferably, the voltage stabilizing circuit comprises a resistor RA2, a voltage regulator tube ZD1 and a capacitor C5, one end of the resistor RA2 is connected with the positive electrode output end of the rectifying circuit, the other end of the resistor RA2 is connected with the cathode of the voltage regulator tube ZD1 and the light-operated control circuit, the anode of the voltage regulator tube ZD1 is grounded, and the capacitor C5 is connected with the voltage regulator tube ZD1 in parallel.
Preferably, the linear driving control circuit includes a driving chip U1, a MOS transistor Q1, a resistor R1, a resistor R2, a resistor R3, a resistor RA1, a resistor RB, a resistor RIN1, a capacitor C1, a capacitor C2, a capacitor C3, and a capacitor CLR, the 1 st pin of the driving chip U1 is connected to the photocontrol circuit, the 2 nd pin of the driving chip U1 is connected to one end of the resistor R3 and one end of the capacitor C2, the other end of the resistor R3 is connected to the photocontrol circuit, the 3 rd pin of the driving chip U1 is connected to one end of the capacitor C1, the 4 th pin of the driving chip U1, the other end of the capacitor C1, and the other end of the capacitor C1 are grounded, the 6 th pin of the driving chip U1 is connected to the gate of the MOS transistor Q1, the drain of the MOS transistor Q1 is connected to the LED load circuit, the source of the MOS transistor Q1 is connected to the ground through the resistor R1 and the resistor R1, the 5 th pin of the driving chip U1 is connected to a connection node between the source of the MOS transistor Q1 and the resistor R1, the 7 th pin of the driving chip U1 is connected to one end of a resistor RA1 and one end of a resistor RB, respectively, the other end of the resistor RA1 is connected to the rectifying circuit, the other end of the resistor RB is grounded, the capacitor CLR is connected in parallel with the resistor RB, the 8 th pin of the driving chip U1 is connected to the rectifying circuit through a resistor RIN1, and the capacitor C3 is connected between the 8 th pin of the driving chip U1 and the ground.
Preferably, the LED load circuit comprises a plurality of LED lamp beads which are sequentially connected in series.
Preferably, the number of the LED lamp beads is 15.
Preferably, the rectifier circuit comprises a fuse, a voltage-sensitive tube and a rectifier, the rectifier is connected with the alternating current power supply through the fuse, and the voltage-sensitive tube is connected between two input ends of the rectifier.
The utility model has the advantages of: the linear driving light control circuit with the time delay function comprises a light control circuit and a linear driving control circuit, the light control circuit detects the intensity of external light and outputs an opening control signal or a closing control signal according to a detection result, and the linear driving control circuit correspondingly controls the LED load circuit to be turned on or turned off according to the opening control signal or the closing control signal, so that the lamp can be automatically turned off in the daytime and turned on at night, the intellectualization of the LED lamp is enhanced, and electric energy is saved. In addition, the light-operated control circuit also comprises a delay circuit, and the output of the closing control signal is delayed by the delay circuit when the lamp is turned to the daytime at night, so that the output of the opening control signal and the output of the closing control signal respectively correspond to different illumination intensities, and the problem that the lamp flickers back and forth at a place with critical illumination is avoided.
Drawings
Fig. 1 is a schematic circuit diagram of a linear driving light control circuit with a delay function according to the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more clearly understood by those skilled in the art, the present invention will be further described with reference to the accompanying drawings and examples.
As shown in fig. 1, in an embodiment of the present invention, the linear driving light control circuit with a delay function includes an LED load circuit 10, a rectifying circuit 20, a light control circuit 30, a voltage regulator circuit 40, and a linear driving control circuit 50. The rectifier circuit 20 is configured to rectify an input ac power into a dc power to supply to the LED load circuit 10; the light control circuit 30 includes a photodiode D2 and a delay circuit 31, the photodiode D2 is used for detecting the intensity of external light and outputting an on control signal or an off control signal according to the detection result, and the delay circuit 31 is used for delaying the output of the off control signal; the voltage stabilizing circuit 40 is configured to provide a stable working voltage for the photocontrol control circuit 30; the linear driving control circuit 50 is configured to control a current flowing through the LED load circuit 10 according to the on control signal or the off control signal, so as to turn on or off the LED load circuit 10.
The LED load circuit 10 includes a plurality of LED lamp beads connected in series in sequence, and in this embodiment, the number of the LED lamp beads is preferably 15.
The rectifier circuit 20 includes a Fuse, a voltage-sensitive tube MOV1 and a rectifier BD 1. The rectifier BD1 is connected to an ac power supply through the Fuse, and is configured to rectify the input ac power into dc power and output the dc power. The Fuse limits the current flowing through the rectifier BD 1; the voltage-dependent tube MOV1 is connected between two input terminals of the rectifier BD1 for limiting the input voltage of the rectifier BD 1.
The delay circuit 31 includes a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a diode D1, an MOS transistor Q2, and a transistor Q3, wherein one end of the resistor R8 is connected to the output terminal of the voltage regulator 40, the other end of the resistor R8 is connected to the cathode of the photodiode D8, one end of the resistor R8, the base of the transistor Q8, and the cathode of the diode D8, the anode of the photodiode D8, the other end of the resistor R8, and the emitter of the transistor Q8 are grounded, the collector of the transistor Q8 is connected to the output terminal of the voltage regulator 40 through the resistor R8, the anode of the diode D8 is connected to the linear driving control circuit 50 through the resistor R8 and the resistor R8 in sequence, the gate of the MOS transistor Q8 is connected to a connection node between the collector of the transistor Q8 and the resistor R8, the source of the MOS transistor Q8 is grounded, and the drain of the MOS transistor Q8 are connected to, The connection node between the resistors R4.
The voltage stabilizing circuit 40 comprises a resistor RA2, a voltage stabilizing tube ZD1 and a capacitor C5, one end of the resistor RA2 is connected with the anode output end of the rectifying circuit 20, the other end of the resistor RA2 is connected with the cathode of the voltage stabilizing tube ZD1, the anode of the voltage stabilizing tube ZD1 is grounded, and the capacitor C5 is connected with the voltage stabilizing tube ZD1 in parallel. The other end of the resistor RA2 is also connected with the grid of the MOS tube Q2 through a resistor R7 and a resistor R6, and the other end of the resistor RA2 is also connected with the base of the triode Q3 through a resistor R8, so that bias voltage is provided for the MOS tube Q2 and the triode Q3.
The linear driving control circuit 50 includes a driving chip U1, a MOS transistor Q1, a resistor R1, a resistor R2, a resistor R3, a resistor RA1, a resistor RB, a resistor RIN1, a capacitor C1, a capacitor C2, a capacitor C3, and a capacitor CLR, the 1 st pin of the driving chip U1 is connected to the photocontrol circuit 30, the 2 nd pin of the driving chip U1 is connected to one end of the resistor R3 and one end of the capacitor C2, the other end of the resistor R3 is connected to the photocontrol circuit 30, the 3 rd pin of the driving chip U1 is connected to one end of the capacitor C1, the 4 th pin of the driving chip U1, the other end of the capacitor C1, and the other end of the capacitor C1 are grounded, the 6 th pin of the driving chip U1 is connected to the gate of the MOS transistor Q1, the drain of the MOS transistor Q1 is connected to the LED load circuit 10, the source of the MOS transistor Q1 is connected to the ground through the resistor R1, and the resistor R1, the 5 th pin of the driving chip U1 is connected to a connection node between the source of the MOS transistor Q1 and the resistor R1, the 7 th pin of the driving chip U1 is connected to one end of a resistor RA1 and one end of a resistor RB, respectively, the other end of the resistor RA1 is connected to the rectifier circuit 20, the other end of the resistor RB is grounded, the capacitor CLR is connected in parallel with the resistor RB, the 8 th pin of the driving chip U1 is connected to the rectifier circuit 20 through a resistor RIN1, and the capacitor C3 is connected between the 8 th pin of the driving chip U1 and the ground.
The utility model discloses linear drive light control circuit who possesses time delay function's theory of operation as follows:
1) when the day changes to night, the light received by the photodiode D2 is weakened, the resistance value presented by the photodiode D2 is changed from small to large, the voltage divided by the resistor R8, the resistor R9 and the photodiode D2 and then connected to the base level of the triode Q3 is changed from small to large, when the starting voltage of the triode Q3 is reached, the triode Q3 is conducted, the MOS tube Q2 is turned off, and the 2 nd pin of the driving chip U1 sequentially passes through the resistor R3, the resistor R4, the resistor R5, the diode D1 and the resistor R9 and then is grounded to form an output loop. The 1 st pin of the driving chip U1 is a detection pin, the light received by the photodiode D2 is continuously weakened, and when the 1 st pin of the driving chip U1 detects that the voltage is greater than 0.5V, the 6 th pin of the driving chip U1 outputs a high level signal to the MOS transistor Q1, so as to light the LED lamp bead in the LED load circuit 10.
2) When the day is changed from night to day, the light received by the photodiode D2 changes from weak to strong, the resistance value presented by the photodiode D2 changes from large to small, and the voltage divided by the resistor R8, the resistor R9 and the photodiode D2 and then connected to the base level of the triode Q3 changes from large to small. However, during the process before the voltage of the base stage of the transistor Q3 is reduced to the turn-on voltage, due to the characteristics of the transistor, the voltage of the base stage of the transistor Q3 is kept constant, and the voltage value is equal to the forward voltage drop when the transistor Q3 is turned on, so that the voltage detected by the 1 st pin of the driver chip U1 is kept constant during the process, and the LED lamp bead in the LED load circuit 10 is kept in the lighting state. When the light received by the photodiode D2 is continuously intensified until the base voltage of the triode Q3 is lower than the turn-on voltage, the triode Q3 is cut off, the MOS tube Q2 is conducted, and the 2 nd pin of the driving chip U1 sequentially passes through the resistor R3, the resistor R4 and the MOS tube Q2 and then is grounded to form an output loop. At this time, the 1 st pin of the driving chip U1 detects that the voltage is less than 0.5V, the 6 th pin of the driving chip U1 outputs a low level signal to the MOS transistor Q1, and the LED lamp bead in the LED load circuit 10 is turned off.
The linear driving light control circuit with the time delay function of the utility model, the light control circuit 30 detects the external light intensity and converts the external light intensity into an electric signal, when the value of the electric signal is higher than the set value, an opening control signal is outputted to the linear driving control circuit 50, the linear driving control circuit 50 lights the LED lamp bead of the LED load circuit 10 according to the opening control signal, when the value of the electric signal is lower than the set value, a closing control signal is outputted to the linear driving control circuit 50, the linear driving control circuit 50 controls the LED lamp bead of the LED load circuit 10 to be extinguished according to the closing control signal, the linear driving light control circuit with the time delay function can control the on-off switching of the LED load circuit 10 according to the intensity of the external light, the light control function is realized, and the LED load circuit 10 is automatically extinguished in daytime, the lamp can automatically light at night, thereby enhancing the intellectualization of the lamp and saving the electric energy. In addition, the light control circuit 30 further includes a delay circuit 31, and the delay circuit 31 delays the output of the turn-off control signal by using the characteristic of the transistor Q3, so that the outputs of the turn-on control signal and the turn-off control signal respectively correspond to different illumination intensities, thereby avoiding the problem that the lamp flickers back and forth at a critical illumination place.
The foregoing is considered as illustrative of the preferred embodiments of the invention and is not intended to limit the invention in any way. Various equivalent changes and modifications can be made on the basis of the above embodiments by those skilled in the art, and all equivalent changes and modifications within the scope of the claims should fall within the protection scope of the present invention.
Claims (7)
1. A linear driving light control circuit with a time delay function is characterized by comprising:
an LED load circuit is provided, which is provided with a load circuit,
the rectifying circuit is used for rectifying the input alternating current into direct current to supply to the LED load circuit;
the light-operated control circuit comprises a photosensitive diode D2 and a time delay circuit, wherein the photosensitive diode D2 is used for detecting the intensity of external light and outputting an opening control signal or a closing control signal according to the detection result, and the time delay circuit is used for delaying the output of the closing control signal;
the voltage stabilizing circuit is used for providing stable working voltage for the light control circuit;
and the linear driving control circuit is used for correspondingly controlling the LED load circuit to be lightened or extinguished according to the opening control signal or the closing control signal.
2. The light control circuit of claim 1, wherein the delay circuit comprises a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a diode D1, a MOS transistor Q2 and a transistor Q3, one end of the resistor R8 is connected to the output terminal of the regulator circuit, the other end of the resistor R8 is connected to the cathode of the photodiode D2, one end of the resistor R9, the base of the transistor Q3 and the cathode of the diode D1, the anode of the photodiode D2, the other end of the resistor R9 and the emitter of the transistor Q3 are grounded, the collector of the transistor Q3 is connected to the output terminal of the regulator circuit through a resistor R7, the anode of the diode D1 is connected to the linear driving control circuit through a resistor R5 and a resistor R4 in sequence, the gate of the MOS transistor Q2 is connected to a connection node between the collector of the transistor Q3 and the resistor R7 through a resistor R6, the source of the MOS transistor Q2 is grounded, and the drain of the MOS transistor Q2 is connected to the connection node between the resistors R5 and R4.
3. The linear driving light control circuit as claimed in claim 1, wherein the voltage regulator circuit comprises a resistor RA2, a voltage regulator ZD1 and a capacitor C5, one end of the resistor RA2 is connected to the positive output end of the rectifying circuit, the other end of the resistor RA2 is connected to the cathode of the voltage regulator ZD1 and the light control circuit, the anode of the voltage regulator ZD1 is grounded, and the capacitor C5 is connected in parallel with the voltage regulator ZD 1.
4. The linear driving light control circuit as claimed in claim 1, wherein the linear driving control circuit comprises a driving chip U1, a MOS transistor Q1, a resistor R1, a resistor R2, a resistor R3, a resistor RA1, a resistor RB, a resistor RIN1, a capacitor C1, a capacitor C2, a capacitor C3 and a capacitor CLR, the 1 st pin of the driving chip U1 is connected to the light control circuit, the 2 nd pin of the driving chip U1 is connected to one end of a resistor R3 and one end of a capacitor C2 respectively, the other end of a resistor R3 is connected to the light control circuit, the 3 rd pin of the driving chip U1 is connected to one end of a capacitor C1, the 4 th pin of the driving chip U1, the other end of a capacitor C1 and the other end of a capacitor C2 are grounded, the 6 th pin of the driving chip U1 is connected to the gate of the MOS transistor Q1, the drain of the MOS transistor Q1 is connected to the load of the LED 1, and the source of the MOS transistor Q1 is connected to the ground through the resistor R1, the R2 is connected in parallel with a resistor R1, the 5 th pin of the driving chip U1 is connected to a connection node between the source of the MOS transistor Q1 and the resistor R1, the 7 th pin of the driving chip U1 is connected to one end of a resistor RA1 and one end of a resistor RB, the other end of the resistor RA1 is connected to the rectifying circuit, the other end of the resistor RB is grounded, the capacitor CLR is connected in parallel with the resistor RB, the 8 th pin of the driving chip U1 is connected to the rectifying circuit through a resistor RIN1, and the capacitor C3 is connected between the 8 th pin of the driving chip U1 and ground.
5. A linearly driven light control circuit as claimed in claim 1, wherein: the LED load circuit comprises a plurality of LED lamp beads which are sequentially connected in series.
6. A linearly driven light control circuit as claimed in claim 5, wherein: the number of the LED lamp beads is 15.
7. A linearly driven light control circuit as claimed in claim 1, wherein: the rectifier circuit comprises a fuse, a voltage-sensitive tube and a rectifier, the rectifier is connected with an alternating current power supply through the fuse, and the voltage-sensitive tube is connected between two input ends of the rectifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920046555.8U CN209824082U (en) | 2019-01-11 | 2019-01-11 | Linear driving light-operated circuit with time delay function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920046555.8U CN209824082U (en) | 2019-01-11 | 2019-01-11 | Linear driving light-operated circuit with time delay function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209824082U true CN209824082U (en) | 2019-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920046555.8U Active CN209824082U (en) | 2019-01-11 | 2019-01-11 | Linear driving light-operated circuit with time delay function |
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| Country | Link |
|---|---|
| CN (1) | CN209824082U (en) |
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2019
- 2019-01-11 CN CN201920046555.8U patent/CN209824082U/en active Active
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Address after: B901 and b906, innovation Plaza, No. 2007, Pingshan Avenue, Liulian community, Pingshan street, Pingshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Intelligent Technology Co., Ltd. Address before: 518055 Guangdong city of Shenzhen province Nanshan District Xili Street Nanshan Chi Park building A7 503-A Patentee before: Shenzhen Intelligent Technology Co., Ltd. |
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