CN211671015U - Control circuit for intelligently regulating and controlling color temperature and brightness of LED street lamp according to application scene - Google Patents
Control circuit for intelligently regulating and controlling color temperature and brightness of LED street lamp according to application scene Download PDFInfo
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- CN211671015U CN211671015U CN201922493741.9U CN201922493741U CN211671015U CN 211671015 U CN211671015 U CN 211671015U CN 201922493741 U CN201922493741 U CN 201922493741U CN 211671015 U CN211671015 U CN 211671015U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The utility model discloses a control circuit for intelligently regulating and controlling the color temperature and the brightness of an LED street lamp according to an application scene, which comprises a control unit and an overvoltage protection unit connected with the control unit; the invention realizes the brightness adjustment of the LED lamp group by utilizing the characteristic that the resistance value of the variable resistor Rf in the control unit can change according to the change of environmental factors; the color temperature of the street lamp can be adjusted by adjusting the brightness of a plurality of LED lamp sets with different colors of the street lamp by adopting a plurality of control circuits. In addition, still control circuit still is equipped with the voltage protection unit, when the excessive pressure appears in the course of the work, can protect the circuit, has improved control circuit's security.
Description
Technical Field
The utility model relates to a control circuit according to using scene intelligent control LED street lamp colour temperature and luminance.
Background
The color temperature is the most common indicator for representing the spectral quality of a light source and is defined by an absolute black body, and when the radiation of the light source is completely the same as the radiation of the absolute black body in the visible region, the temperature of the black body is called the color temperature of the light source. Low color temperature light sources are characterized by a relatively high amount of red radiation in the energy distribution, giving a feeling of weight and warmth, commonly referred to as "warm light"; as the color temperature increases, the proportion of blue radiation in the energy distribution increases, giving the sensation of coolness, commonly referred to as "cold light".
The LED lamp has the advantages of high luminous efficiency, good energy-saving effect, long service life and the like, and is widely applied to daily life of people. Then, the existing LED lamp has a unique light source, and one lamp can only emit light beams with one color temperature, and as the living standard improves, people put forward further demands on the color temperature of the lamp, such as different ambient temperatures in different seasons and different time periods, and different color temperatures of the lamp are needed to meet diversified demands. The conventional LED lamp obviously cannot meet the requirement of a conventional single-color temperature lamp.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a control circuit according to using scene intelligent control LED street lamp colour temperature and luminance, this control circuit utilizes the variable resistance Rf resistance value can change and the characteristics that change realize the adjustting of the lighteness to the LED banks according to environmental factor.
In order to solve the technical problem, the utility model provides a control circuit according to using scene intelligent control LED street lamp colour temperature and luminance, including the control unit and with the overvoltage protection unit that the control unit is connected, the control unit includes first transistor T1, second transistor T2, third transistor T3, fourth transistor T4, first comparator A1 and variable resistance Rf;
a base of the first transistor T1 is connected to a power supply source through a first resistor R1, a collector of the first transistor T1 is connected to the power supply source through a second resistor R2, an emitter of the first transistor T1 is connected to an emitter of the second transistor T2, a collector of the second transistor T2 is grounded, a base of the third transistor T3 is connected between an emitter of the first transistor T1 and an emitter of the second transistor T2 through a third resistor R3, an emitter of the third transistor T3 is connected to the power supply source through a fourth resistor R4, a positive polarity terminal of the LED lamp set is connected to a collector of the third transistor T3, and a negative polarity terminal of the LED lamp set is grounded; the emitter of the fourth transistor T4 is connected between the emitter of the third transistor T3 and the fourth resistor R4 through a fifth resistor R5, the collector of the fourth transistor T4 is grounded, the base of the fourth transistor T4 is connected with the output end of the first comparator a1 through a sixth resistor R6, the non-inverting input end of the first comparator a1 is connected to the reference voltage V2 through a seventh resistor R7, and the inverting input end of the first comparator a1 is connected to the second reference voltage V3 through a tenth resistor R10; one end of the variable resistor Rf is connected to the inverting input terminal of the first comparator a 1.
Further, the voltage protection unit includes a sixth resistor R6, a tenth resistor R10, and a second comparator a 2; one end of the sixth resistor R6 is connected to one end of the fourth resistor R4 connected to the power supply, the other end of the sixth resistor R6 is connected to one end of the tenth resistor R10, the other end of the tenth resistor R10 is grounded, the non-inverting input terminal of the second comparator a2 is connected to a node between the sixth resistor R6 and the tenth resistor R10 through an eleventh resistor R11, the inverting input terminal of the second comparator a2 is connected to the first reference voltage V1, and the output terminal of the second comparator a2 is connected to the base of the second transistor T2.
The utility model has the advantages that: in the actual application process, the brightness of the LED lamp group can be adjusted by utilizing the characteristic that the resistance value of the variable resistor Rf can be changed according to the change of environmental factors; the color temperature of the street lamp can be adjusted by adjusting the brightness of a plurality of LED lamp sets with different colors of the street lamp by adopting a plurality of control circuits.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic circuit diagram of an embodiment of the present invention.
Detailed Description
The control circuit for intelligently regulating and controlling the color temperature and the brightness of the LED street lamp according to the application scene as shown in fig. 1 comprises a control unit and an overvoltage protection unit connected with the control unit, wherein the control unit comprises a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a first comparator a1 and a variable resistor Rf; a base of the first transistor T1 is connected to a power supply source through a first resistor R1, a collector of the first transistor T1 is connected to the power supply source through a second resistor R2, an emitter of the first transistor T1 is connected to an emitter of the second transistor T2, a collector of the second transistor T2 is grounded, a base of the third transistor T3 is connected between an emitter of the first transistor T1 and an emitter of the second transistor T2 through a third resistor R3, an emitter of the third transistor T3 is connected to the power supply source through a fourth resistor R4, a positive polarity terminal of the LED lamp set is connected to a collector of the third transistor T3, and a negative polarity terminal of the LED lamp set is grounded; the emitter of the fourth transistor T4 is connected between the emitter of the third transistor T3 and the fourth resistor R4 through a fifth resistor R5, the collector of the fourth transistor T4 is grounded, the base of the fourth transistor T4 is connected with the output end of the first comparator a1 through a sixth resistor R6, the non-inverting input end of the first comparator a1 is connected to the reference voltage V2 through a seventh resistor R7, and the inverting input end of the first comparator a1 is connected to the second reference voltage V3 through a tenth resistor R10; one end of the variable resistor Rf is connected to the inverting input terminal of the first comparator a 1.
In the actual application process, the variable resistor Rf can select a variable resistor such as a photoresistor or a thermistor according to the actual application scene; the light and the temperature of the application scene are sensed through the light sensitive resistor and the thermistor, and the brightness of the LED lamp set is adjusted according to the change of the light sensitive resistor and the thermistor along with the change of the light and the temperature of the application scene; the working principle is as follows:
when the photo-resistor with the resistance value reduced along with the increase of the natural light intensity of an application scene is selected as the variable resistor, the natural light intensity of the application scene is sensed by the photo-resistor, when the natural light intensity of the application scene is stronger, the resistance value of the photo-resistor is reduced, the voltage obtained by the photo-resistor is reduced until the voltage value of the equidirectional input end of the first comparator A1 is greater than the voltage value of the reverse input end of the first comparator A1, the first comparator A1 outputs high level, the fourth transistor T4 is switched on, and is electrified and shunted through the fifth resistor R5 to adjust the current of the collector of the third transistor T3, so that the aim of reducing the brightness of the LED lamp group is fulfilled; on the contrary, when the natural light intensity of the application scene is weakened, the brightness of the LED lamp set can be enhanced, which is not described herein again.
When the thermistor with the resistance value reduced along with the temperature rise of an application scene is selected as the variable resistor, the temperature of the application scene is sensed by the thermistor, when the temperature of the application scene rises, the resistance value of the photoresistor is reduced, and the voltage obtained by dividing the photoresistor is reduced until the voltage value of the equidirectional input end of the first comparator A1 is greater than the voltage value of the reverse input end of the first comparator A1, the first comparator A1 outputs high level, the fourth transistor T4 is conducted, and is electrified and shunted through the fifth resistor R5 to adjust the current of the collector of the third transistor T3, so that the aim of reducing the brightness of the LED lamp group is fulfilled; on the contrary, when the temperature of the application scene is reduced, the brightness of the LED lamp set can be enhanced, which is not described herein again.
According to an embodiment of the present application, the voltage protection unit includes a sixth resistor R6, a tenth resistor R10, and a second comparator a 2; one end of the sixth resistor R6 is connected to one end of the fourth resistor R4 connected to the power supply, the other end of the sixth resistor R6 is connected to one end of the tenth resistor R10, the other end of the tenth resistor R10 is grounded, the non-inverting input terminal of the second comparator a2 is connected to a node between the sixth resistor R6 and the tenth resistor R10 through an eleventh resistor R11, the inverting input terminal of the second comparator a2 is connected to the first reference voltage V1, and the output terminal of the second comparator a2 is connected to the base of the second transistor T2.
When overvoltage occurs in the working process, namely when the voltage of the same-direction input end of the second comparator A2 is larger than the voltage of the reverse-direction input end of the second comparator A2, the second comparator A2 outputs high level, at the moment, the second transistor T2 is conducted, the first transistor is cut off, namely the third transistor T3 is cut off, the circuit is disconnected, the LED lamp set can protect the circuit, and the safety of the control circuit is improved.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (2)
1. The control circuit for intelligently regulating and controlling the color temperature and the brightness of the LED street lamp according to an application scene is characterized by comprising a control unit and an overvoltage protection unit connected with the control unit, wherein the control unit comprises a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a first comparator A1 and a variable resistor Rf;
a base of the first transistor T1 is connected to a power supply source through a first resistor R1, a collector of the first transistor T1 is connected to the power supply source through a second resistor R2, an emitter of the first transistor T1 is connected to an emitter of the second transistor T2, a collector of the second transistor T2 is grounded, a base of the third transistor T3 is connected between an emitter of the first transistor T1 and an emitter of the second transistor T2 through a third resistor R3, an emitter of the third transistor T3 is connected to the power supply source through a fourth resistor R4, a positive polarity terminal of the LED lamp set is connected to a collector of the third transistor T3, and a negative polarity terminal of the LED lamp set is grounded; the emitter of the fourth transistor T4 is connected between the emitter of the third transistor T3 and the fourth resistor R4 through a fifth resistor R5, the collector of the fourth transistor T4 is grounded, the base of the fourth transistor T4 is connected with the output end of the first comparator a1 through a sixth resistor R6, the non-inverting input end of the first comparator a1 is connected to the reference voltage V2 through a seventh resistor R7, and the inverting input end of the first comparator a1 is connected to the second reference voltage V3 through a tenth resistor R10; one end of the variable resistor Rf is connected to the inverting input terminal of the first comparator a 1.
2. The control circuit for intelligently regulating and controlling the color temperature and the brightness of the LED street lamp according to the application scene of claim 1, wherein the voltage protection unit comprises a sixth resistor R6, a tenth resistor R10 and a second comparator A2; one end of the sixth resistor R6 is connected to one end of the fourth resistor R4 connected to the power supply, the other end of the sixth resistor R6 is connected to one end of the tenth resistor R10, the other end of the tenth resistor R10 is grounded, the non-inverting input terminal of the second comparator a2 is connected to a node between the sixth resistor R6 and the tenth resistor R10 through an eleventh resistor R11, the inverting input terminal of the second comparator a2 is connected to the first reference voltage V1, and the output terminal of the second comparator a2 is connected to the base of the second transistor T2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922493741.9U CN211671015U (en) | 2019-12-31 | 2019-12-31 | Control circuit for intelligently regulating and controlling color temperature and brightness of LED street lamp according to application scene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922493741.9U CN211671015U (en) | 2019-12-31 | 2019-12-31 | Control circuit for intelligently regulating and controlling color temperature and brightness of LED street lamp according to application scene |
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| Publication Number | Publication Date |
|---|---|
| CN211671015U true CN211671015U (en) | 2020-10-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922493741.9U Active CN211671015U (en) | 2019-12-31 | 2019-12-31 | Control circuit for intelligently regulating and controlling color temperature and brightness of LED street lamp according to application scene |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211671015U (en) |
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2019
- 2019-12-31 CN CN201922493741.9U patent/CN211671015U/en active Active
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