CN113873710A - Light control circuit and light control device using same - Google Patents

Light control circuit and light control device using same Download PDF

Info

Publication number
CN113873710A
CN113873710A CN202111183595.5A CN202111183595A CN113873710A CN 113873710 A CN113873710 A CN 113873710A CN 202111183595 A CN202111183595 A CN 202111183595A CN 113873710 A CN113873710 A CN 113873710A
Authority
CN
China
Prior art keywords
circuit
resistor
capacitor
driving
buck
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202111183595.5A
Other languages
Chinese (zh)
Other versions
CN113873710B (en
Inventor
马振波
柴晓兰
王书仓
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Sitis Technology Co ltd
Original Assignee
Zhejiang Sitis Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Sitis Technology Co ltd filed Critical Zhejiang Sitis Technology Co ltd
Publication of CN113873710A publication Critical patent/CN113873710A/en
Application granted granted Critical
Publication of CN113873710B publication Critical patent/CN113873710B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/12—Controlling the intensity of the light using optical feedback
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/34—Voltage stabilisation; Maintaining constant voltage
    • 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
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The invention discloses a light control circuit and a light control device using the same, which are used for automatically controlling the lighting state of a load LED lamp according to a photosensitive signal acquired by a photosensitive sampling circuit. The light sensation probe of the light control device using the light control circuit is arranged towards the ground, so that the influence of dazzling light during vehicle crossing on light sensation is reduced, the light sensation result is more accurate, the light control device is convenient to calibrate photosensitive signals, the light sensation sensitivity is adjustable, and the applicability of different use scenes to different light sensation sensitivities is improved. In addition, the light-operated circuit arranged in the light-operated device has a simple structure and stronger interference resistance, and can provide boosting and voltage reducing control for the headlamp so as to change the lighting intensity of the headlamp and meet different requirements of different types of motor vehicles or non-motor vehicles on the light intensity.

Description

Light control circuit and light control device using same
Technical Field
The invention relates to the technical field of light-operated switches, in particular to a light-operated circuit and a light-operated device using the same.
Background
At present, headlights of electric vehicles and motorcycles are controlled by a physical key switch, when the headlights need to be turned on, a key is manually pressed to enable a connecting circuit between a storage battery and a large lamp to be connected for supplying power to the headlights, when the headlights need to be turned off, the key is pressed again to disconnect the connecting circuit between the storage battery and the large lamp, however, the manual control mode is troublesome, and the automation degree of turning on and turning off the headlights is low.
The light-operated switch is a multifunctional advanced time controller (time control switch) integrating the light-operated function and the common time controller, and the light-operated probe (function) and the time control function can be simultaneously started according to the energy-saving requirement so as to achieve the best energy-saving effect, thereby being the best energy-saving control device for equipment such as street lamps, landscape lamps, advertising lamp boxes, neon lamps and the like. However, the light control of the headlights of the electric vehicle or the motorcycle still involves driving safety, and the light sensitivity of the light control switch is easily affected by dazzling light and other phenomena when the vehicle is in a meeting state, so that the common light control switch is difficult to be applied to the automatic light control of the headlights of the electric vehicle or the motorcycle. In addition, the common light-operated switch cannot control the lighting intensity of the load lamp, and cannot meet different requirements of different use scenes on the lighting intensity.
Disclosure of Invention
The light sensitive probe of the light control device is arranged towards the ground, so that the influence of dazzling light during vehicle crossing on light perception is reduced, the light perception result is more accurate, the light control device is convenient to operate for calibrating photosensitive signals, the light perception sensitivity is adjustable, and the applicability of different use scenes to different light perception sensitivities is improved. In addition, the light-operated circuit arranged in the light-operated device has a simple structure and stronger interference resistance, and can provide boosting and voltage reducing control for the headlamp so as to change the lighting intensity of the headlamp and meet different requirements of different types of motor vehicles or non-motor vehicles on the light intensity.
In order to achieve the purpose, the invention adopts the following technical scheme:
the light control circuit is used for automatically controlling the lighting state of a load LED lamp according to a photosensitive signal acquired by a photosensitive sampling circuit and comprises a rectifying anti-reverse connection circuit, a voltage stabilizing circuit, a drive control circuit, a load drive circuit, a storage circuit, a photosensitive sampling circuit and a scaling circuit, wherein the input end of the rectifying anti-reverse connection circuit is connected with the electric output end of a power supply, and the output end of the rectifying anti-reverse connection circuit is respectively connected with the input end of the voltage stabilizing circuit and the input end of the load drive circuit;
the output end of the voltage stabilizing circuit is connected with the input ends of the drive control circuit, the storage circuit and the photosensitive sampling circuit, and stable working voltage is provided for the three circuits;
the drive control circuit is electrically connected with the storage circuit, the photosensitive sampling circuit, the scaling circuit and the load drive circuit, and is used for receiving the scaling signal generated by the scaling circuit and storing the scaling information into a memory provided by the storage circuit, and is also used for reading the photosensitive signal sampled by the photosensitive sampling circuit and the scaling information stored in the memory and outputting a drive signal for controlling the lighting state of the load LED lamp;
the load driving circuit drives and changes the lighting state of the load LED lamp according to the driving signal output by the driving control circuit.
Preferably, the rectifying anti-reverse connection circuit is a diode D1, the anode of the diode D1 is used as the input terminal of the rectifying anti-reverse connection circuit and is connected to the electrical output terminal of the power supply, and the cathode of the diode D1 is used as the output terminal of the rectifying anti-reverse connection circuit.
Preferably, the voltage stabilizing circuit comprises a low dropout linear regulator IC1, capacitors C1, C2 and a resistor R2, wherein one end of the resistor R2 is used as an input end of the voltage stabilizing circuit and is connected with an output end of the rectifying anti-reverse connection circuit, and the other end of the resistor R2 is connected with a third end of the low dropout linear regulator IC 1; one end of the capacitor C1 is connected to the third terminal of the low dropout regulator IC1, the other end is connected to a first end of the low dropout regulator IC1, and the first end of the low dropout regulator IC1 is grounded; one end of the capacitor C2 is connected with the second end of the low dropout linear regulator IC1, and the other end is grounded; the second terminal of the low dropout regulator IC1 is used as the output terminal of the voltage stabilizing circuit.
Preferably, the chip model of the low dropout linear regulator IC1 is TX52L33BTE/ME 6228.
Preferably, the drive control circuit comprises a singlechip U1 and a capacitor C3, one end of the capacitor C3 is connected with a first pin of the singlechip U1, and the other end of the capacitor C3 is grounded; the first pin of the singlechip U1 is used as the input end of the drive control circuit to be connected with the output end of the voltage stabilizing circuit, the second pin is used as the output end of the drive signal, the third pin is connected with the calibration information output end of the calibration circuit, the fourth pin is connected with the calibration information reading end of the storage circuit, the fifth pin is connected with the calibration information storage end of the storage circuit, the sixth pin is connected with the photosensitive signal output end of the photosensitive sampling circuit, the seventh pin is suspended, and the eighth pin is grounded.
Preferably, the memory circuit comprises a memory IC2, resistors R3, R4 and a capacitor C4, a first terminal of the memory IC2 is used as the calibration information storage terminal of the memory circuit, the single chip microcomputer U1 stores the received calibration information from the calibration information storage terminal to the memory IC2 through a fifth pin thereof,
the third end of the memory IC2 is used as the calibration information reading end of the storage circuit, and the single chip microcomputer U1 reads the calibration information from the memory IC2 through the calibration information reading end connected to the fourth pin of the single chip microcomputer U1;
the first end of the memory IC2 is connected in series with the resistor R4 and then connected with the output end of the voltage stabilizing circuit, and the third end of the memory IC2 is connected in series with the resistor R3 and then connected with the output end of the voltage stabilizing circuit;
the fifth end of the memory IC2 is grounded, two ends of the capacitor C4 are connected between the second end and the fourth end of the memory IC2, the fourth end of the memory IC2 is connected to the output end of the voltage stabilizing circuit, and the second end of the memory IC2 is grounded.
Preferably, the chip model of the memory IC2 is TX24C 02N.
Preferably, the photosensitive sampling circuit comprises a photosensitive tube Q2, resistors R7, R8 and a capacitor C6, wherein a first end of the photosensitive tube Q2 is connected to an output end of the voltage stabilizing circuit, and a second end of the photosensitive tube Q2 is connected in series with the resistor R8 and then is grounded; one end of the resistor R7 is connected to the second end of the photosensitive tube Q2, the other end of the resistor R7 is used as the photosensitive signal output end of the photosensitive sampling circuit and is connected to the sixth pin of the singlechip U1, and the singlechip U1 receives the photosensitive signal acquired by the photosensitive sampling circuit through the sixth pin.
Preferably, the scaling circuit comprises a button SW1, one end of the button SW1 is grounded, and the other end of the button SW1 is connected to the third pin of the single chip microcomputer U1 as the scaling information output end of the scaling circuit.
Preferably, the load driving circuit comprises any one or more of a boosting driving circuit for boosting and controlling the load LED lamp, a step-down driving circuit for step-down and controlling the load LED lamp, a step-up and step-down driving circuit for step-up and step-down and step-up and step-down and step up and step down and step up and step down and step up and step down and step up and step down and step up and step down and step up and step down and step up and step down and step up and step down and step up and step down and step up and step down and step up and step down and step up and step down and step up and step down and step up,
the boost driving circuit comprises a boost driving chip U1, polar capacitors EC1, EC2, capacitors C1, C4, C6, C7, resistors R1, R2, R3, R4, R5, R6, R7, an inductor L1, a diode DV1, a diode VD1, a voltage stabilizing diode DZ1 and a DZ2, wherein the negative electrode of the polar capacitor EC1 is grounded, and the positive electrode of the polar capacitor EC1 is used as the input end of the boost driving circuit and connected with the output end of the rectification anti-reverse connection circuit; the capacitor C1 is connected in parallel across the polar capacitor EC 1;
one end of the inductor L1 is connected with the anode of the polar capacitor EC1, the other end of the inductor L1 is connected with the anode of the diode DV1, and the cathode of the diode DV1 is used as the positive output end of the boost driving circuit and is connected with the anode of the load LED lamp;
one end of the resistor R1 is connected with the anode of the polar capacitor EC1, and the other end of the resistor R1 is connected with the eighth end of the boosting driving chip U1; one end of the capacitor C4 is connected with the eighth end of the boost driving chip U1, and the other end of the capacitor C4 is grounded;
one end of the resistor R2 is connected with the anode of the diode DV1, the other end of the resistor R2 is connected with the fifth end of the boosting driving chip U1, and the EP port of the boosting driving chip U1 is in short circuit with the fifth end of the boosting driving chip U1;
the second end of the boosting driving chip U1 is connected with the output end of the driving control circuit for outputting the driving signal;
the first end of the boosting driving chip U1 is grounded; one end of the capacitor C6 is connected with the seventh end of the boost driving chip U1, and the other end of the capacitor C6 is connected with the first end of the boost driving chip U1;
one end of the capacitor C7 is connected with the third end of the boost driving chip U1, and the other end of the capacitor C7 is grounded;
one end of the resistor R7 is connected with the sixth end of the boosting driving chip U1, and the other end of the resistor R7 is grounded;
the resistor R6 is connected in parallel at two ends of the resistor R7;
one end of the resistor R3 is connected with the fourth end of the boosting driving chip U1, and the other end of the resistor R3 is used as the negative output end of the boosting driving circuit and is connected with the negative electrode of the load LED lamp;
the anode of the diode VD1 is connected in series with the resistor R3 and then connected to the fourth terminal of the boost driving chip U1, and the cathode of the diode VD1 is grounded;
two ends of the resistor R5 are connected in parallel between the anode and the cathode of the diode VD 1;
the resistor R4 is connected in parallel at two ends of the resistor R5;
the anode of the zener diode DZ2 is connected to the fourth terminal of the boost driving chip U1, the cathode is connected to the anode of the zener diode DZ1, and the cathode of the zener diode DZ1 is connected to the cathode of the diode DV 1.
Preferably, the step-down driving circuit includes a step-down driving chip U2, a capacitor C2, C3, C5, a resistor RS1, an resistor RS2, an inductor L2, and a diode DV2, wherein one end of the resistor RS1 is connected to the fifth end of the step-down driving chip U2 and serves as the input end of the step-down driving circuit to be connected to the output end of the tidying anti-reverse connection circuit, and the other end of the resistor RS1 is connected to the fourth end of the step-down driving chip U2 and serves as the positive output end of the step-down driving circuit to be connected to the anode of the load LED lamp;
the resistor RS2 is connected in parallel at two ends of the resistor RS 1;
one end of the inductor L2 is used as a negative output end of the buck driving circuit and is connected with the negative electrode of the load LED lamp, and the other end of the inductor L2 is connected with the first end of the buck driving chip U2 and the positive electrode of the diode DV 2; the cathode of the diode DV2 is connected to the fifth terminal of the buck driving chip U2;
the second end of the buck driving chip U2 is grounded, and the third end of the buck driving chip U2 is used as the driving signal input end of the buck driving circuit and is connected with the driving signal output end of the driving control circuit;
the capacitor C5 is connected between the positive output terminal and the negative output terminal of the buck driving circuit;
one end of the capacitor C2 is connected with the input end of the voltage reduction driving circuit, and the other end of the capacitor C2 is grounded;
one end of the capacitor C3 is connected with the input end of the voltage reduction driving circuit, and the other end of the capacitor C3 is grounded.
Preferably, the buck-boost driving circuit comprises a buck-boost driving chip U3, capacitors C8, C11, C13, C14, C15, C9, C10, resistors R15, R16, R17, R8, R9, R10, R12, R13, R14, a polar capacitor EC3, a MOS tube Q1, an inductor L3 and a voltage stabilizing diode D1,
a first end of the buck-boost driving chip U3 is used as an output end of the buck-boost driving circuit and connected with an output end of the rectifying anti-reverse connection circuit, the first end of the buck-boost driving chip U3 is connected with one end of the inductor L3, the other end of the inductor L3 is connected with an anode of the voltage stabilizing diode D1, and a cathode of the voltage stabilizing diode D1 is used as a positive output end of the buck-boost driving circuit and connected with an anode of the load LED lamp;
one end of the capacitor C8 is connected with the first end of the buck-boost driving chip U3, and the other end of the capacitor C8 is grounded;
a second end of the buck-boost driving chip U3 is used as a driving signal input end and is connected with a driving signal output end of the driving control signal circuit; the third end of the buck-boost driving chip U3 is suspended, and the fourth end of the buck-boost driving chip U3 is connected in series with the capacitor C11 and then grounded;
the sixth end of the buck-boost driving chip U3 is connected in series with the capacitor C14 and then grounded, the sixteenth end of the buck-boost driving chip U3 is connected in series with the capacitor C13 and then grounded, and the sixth end of the buck-boost driving chip U3 is connected in series with the resistor R15 and the resistor R16 in sequence and then grounded; an eighth end (ICTRL) of the buck-boost driving chip U3 is connected in series with the resistor R16 and then grounded, a twelfth end and a fifth end are grounded, a seventh end is connected in series with the resistor R17 and then grounded, and a fourteenth end is suspended;
the capacitor C15 is connected in parallel with two ends of the resistor R16;
a fifteenth end of the buck-boost driving chip U3 is connected to the gate of the MOS transistor Q1, a drain of the MOS transistor Q1 is connected to the anode of the zener diode D1, a source of the MOS transistor Q1 is connected in series with the resistor R9, then connected to a thirteenth end of the buck-boost driving chip U3, and connected in series with the resistor R12, and then grounded;
one end of the resistor R8 is connected with the negative electrode of the zener diode D1, and the other end of the resistor R8 is connected in series with the resistor R10, then is grounded and is connected to the ninth end of the buck-boost driving chip U3;
one end of the capacitor C9 is connected with the cathode of the voltage stabilizing diode D1, and the other end of the capacitor C9 is grounded;
the anode of the polar capacitor EC3 is connected with the cathode of the zener diode D1, and the cathode of the polar capacitor EC3 is connected with the tenth end of the buck-boost driving chip U3;
the capacitor C10 is connected in parallel across the polar capacitor EC 3;
one end of the resistor R14 is connected with the tenth end of the buck-boost driving chip U3, the other end of the resistor R14 is connected with the thirteenth end of the buck-boost driving chip U3 and serves as a negative output end of the buck-boost driving circuit to be connected with the negative electrode of the load LED lamp;
the resistor R13 is connected in parallel at two ends of the resistor R14.
Preferably, the chip model of the boosting driving chip U1 is TX 6210B; the chip model of the voltage reduction driving chip U2 is MBI6657 GST; the chip model of the buck-boost driving chip U3 IS 3957.
Preferably, the resistance current-limiting circuit comprises a MOS transistor Q2, a resistor R11, a capacitor C12, a light-emitting diode DL1, a protection diode D2, a resistor RL1, an RL2, an RL3, an RL4 and an RL5, wherein the resistors RL1, RL2, RL3, RL4 and RL5 are connected in parallel to form a parallel resistor combination, one end of the parallel resistor combination is used as an input end of the resistance current-limiting circuit and connected with an output end of the rectifying anti-reverse connection circuit, the other end of the parallel resistor combination is connected with an anode of the light-emitting diode DL1, and a cathode of the light-emitting diode DL1 is connected with a drain of the MOS transistor Q2;
the source electrode of the MOS transistor Q2 is grounded, the grid electrode of the MOS transistor Q2 is connected in series with one end of the resistor R11, and the other end of the resistor R11 is used as the driving signal input end of the resistor current-limiting circuit and is connected with the driving signal output end of the driving control circuit;
the anode of the protection diode D2 is connected with the source electrode of the MOS transistor Q2, and the cathode of the protection diode D2 is connected with the drain electrode of the MOS transistor Q2;
one end of the capacitor C12 is connected with the grid electrode of the MOS transistor Q2, and the other end of the capacitor C12 is connected with the source electrode of the MOS transistor Q2;
the anode of the light emitting diode DL1 is used as the negative output end of the resistance current limiting circuit and is connected with the cathode of the load LED lamp, and the cathode of the light emitting diode DL1 is used as the positive output end of the resistance current limiting circuit and is connected with the anode of the load LED lamp.
The invention also provides a light control device applying the light control circuit, which comprises a photosensitive sensor and load driving equipment, wherein the photosensitive sensor is arranged at the head position of a motor vehicle or a non-motor vehicle, the photosensitive probe faces the ground, the load driving equipment is arranged on a vehicle body, and a photosensitive sampling circuit in the photosensitive sensor and rectifying anti-reverse circuit, a voltage stabilizing circuit, a driving control circuit, a load driving circuit, a storage circuit and a scaling circuit in the load driving equipment are mutually connected through circuits to form the light control circuit for controlling the lighting state of a load LED lamp according to a photosensitive signal sampled by the photosensitive sensor.
The light sensation probe of the light control device provided by the invention is arranged towards the ground, so that the influence of dazzling light during vehicle crossing on light sensation is reduced, the light sensation result is more accurate, the light control device is convenient to calibrate the photosensitive signal, the light sensation sensitivity is adjustable, and the applicability of different use scenes to different light sensation sensitivities is improved. In addition, the light-operated circuit arranged in the light-operated device has a simple structure and stronger interference resistance, and can provide boosting and voltage reducing control for the headlamp so as to change the lighting intensity of the headlamp and meet different requirements of different types of motor vehicles or non-motor vehicles on the light intensity.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic diagram of an overall circuit structure of a light control circuit according to an embodiment of the present invention;
fig. 2 is a circuit frame structure diagram of the light control circuit;
fig. 3 is a circuit configuration diagram of the booster drive circuit;
fig. 4 is a circuit configuration diagram of the step-down driving circuit;
FIG. 5 is a circuit configuration diagram of the buck-boost driving circuit;
FIG. 6 is a circuit configuration diagram of a resistive current limiting circuit;
fig. 7 is a pin diagram of the buck-boost driver chip U3.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and the specific meanings of the terms may be understood by those skilled in the art according to specific situations.
In the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" or the like, if appearing to indicate a connection relationship between the components, is to be understood broadly, for example, as being fixed or detachable or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other components or may be in an interactive relationship with one another. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The light control circuit provided in the embodiment of the present invention is configured to automatically control a lighting state (the lighting state includes lighting, lighting-out, and different lighting intensities of load LED lamps) of a load LED lamp (the load LED lamp includes, besides a single LED lamp as a load, an LED lamp group formed by combining a plurality of LED lamps in series or in parallel) according to a photosensitive signal acquired by a photosensitive sampling circuit, as shown in fig. 1 and fig. 2, the light control circuit includes a rectifying anti-reverse connection circuit 100, a voltage stabilizing circuit 200, a driving control circuit 300, a load driving circuit 400, a storage circuit 500, a photosensitive sampling circuit 600, and a scaling circuit 700, an input end of the rectifying anti-reverse connection circuit 100 is connected to an electrical output end of a power supply (VIN + in fig. 1 represents the power supply), and an output end of the rectifying anti-reverse connection circuit 100 is respectively connected to an input end of the voltage stabilizing circuit 200 and an input end of the load driving circuit 400;
the output end of the voltage stabilizing circuit 200 is connected with the input ends of the driving control circuit 300, the storage circuit 500 and the photosensitive sampling circuit 600, and provides stable working voltage for the three circuits;
the driving control circuit 300 is electrically connected to the storage circuit 500, the photosensitive sampling circuit 600, the scaling circuit 700 and the load driving circuit 400, and is configured to receive the scaling signal generated by the scaling circuit 700 and store the scaling information in the memory provided by the storage circuit 500, and further configured to read the photosensitive signal sampled by the photosensitive sampling circuit 600 and the scaling information stored in the memory and output a driving signal for controlling the lighting state of the load LED lamp 800;
the load driving circuit 400 drives and changes the lighting state of the load LED lamp 800 according to the driving signal output from the driving control circuit 300.
Specifically, as shown in fig. 1, the rectifying and anti-reverse connecting circuit 100 is a diode D1, the anode of the diode D1 is used as the input terminal of the rectifying and anti-reverse connecting circuit 100 to be connected to the electrical output terminal of the power supply, and the cathode of the diode D1 is used as the output terminal of the rectifying and anti-reverse connecting circuit 100.
The voltage stabilizing circuit 200 comprises a low dropout linear regulator IC1, capacitors C1, C2 and a resistor R2, wherein one end of the resistor R2 is used as an input end of the voltage stabilizing circuit and is connected with an output end of a rectification anti-reverse connection circuit (a diode D1), and the other end of the resistor R2 is connected with a third end of a low dropout linear regulator IC 1; one end of the capacitor C1 is connected with the third end of the low dropout linear regulator IC1, the other end of the capacitor C1 is connected with the first end of the low dropout linear regulator IC1, and the first end of the low dropout linear regulator IC1 is grounded; one end of the capacitor C2 is connected with the second end of the low dropout linear regulator IC1, and the other end is grounded; the second terminal of the low dropout regulator IC1 serves as the output terminal of the voltage regulator circuit. The first terminal, the second terminal, and the third terminal of the low dropout regulator IC1 correspond to the numbers "1", "2", and "3" marked on both sides of the low dropout regulator IC1 in fig. 1, respectively.
Preferably, the low dropout linear regulator IC1 has a chip model number TX52L33BTE/ME 6228.
As shown in fig. 1, the driving control circuit 300 includes a single chip microcomputer U1 and a capacitor C3, one end of the capacitor C3 is connected to a first pin of the single chip microcomputer U1, and the other end is grounded; the first pin of the single chip microcomputer U1 is used as the input end of the drive control circuit 300 to be connected with the output end of the voltage stabilizing circuit 200, the second pin is used as the output end of the drive signal, the third pin is connected with the calibration information output end of the calibration circuit 700, the fourth pin is connected with the calibration information reading end of the storage circuit 500, the fifth pin is connected with the calibration information storage end of the storage circuit 500, the sixth pin is connected with the photosensitive signal output end of the photosensitive sampling circuit 600, the seventh pin is suspended, and the eighth pin is grounded. The first pin to the eighth pin of the single chip microcomputer U1 correspond to the numbers "1", "2", "3", "4", "5", "6", "7" and "8" marked on both sides of the single chip microcomputer U1 in the attached drawing 1, respectively.
The memory circuit 500 comprises a memory IC2, resistors R3, R4 and a capacitor C4, a first end of the memory IC2 is used as a calibration information storage end of the memory circuit 500, the singlechip U1 stores the received calibration information from the calibration information storage end into the memory IC2 through a fifth pin of the singlechip U1,
the third end of the memory IC2 is used as a calibration information reading end of the storage circuit, and the singlechip U1 reads the calibration information from the memory IC2 through the calibration information reading end connected with the fourth pin of the singlechip U1;
the first end of the memory IC2 is connected in series with the resistor R4 and then connected with the output end of the voltage stabilizing circuit, and the third end of the memory IC2 is connected in series with the resistor R3 and then connected with the output end of the voltage stabilizing circuit 200;
the fifth terminal of the memory IC2 is grounded, two terminals of the capacitor C4 are connected between the second terminal and the fourth terminal of the memory IC2, the fourth terminal of the memory IC2 is connected to the output terminal of the voltage stabilizing circuit, and the second terminal of the memory IC2 is grounded.
The first terminal to the fifth terminal of the memory IC2 correspond to the numbers "1", "2", "3", "4" and "5" marked on both sides of the memory IC2 in fig. 1, respectively.
The chip model of the memory IC2 is preferably TX24C 02N.
The photosensitive sampling circuit 600 comprises a photosensitive tube Q2, resistors R7, R8 and a capacitor C6, wherein the first end of the photosensitive tube Q2 is connected with the output end of the voltage stabilizing circuit, and the second end of the photosensitive tube Q2 is connected with a resistor R8 in series and then grounded; one end of the resistor R7 is connected with the second end of the photosensitive tube Q2, the other end of the resistor R7 is connected with the sixth pin of the singlechip U1 as the photosensitive signal output end of the photosensitive sampling circuit, and the singlechip U1 receives the photosensitive signal collected by the photosensitive sampling circuit 600 through the sixth pin.
The scaling circuit 700 comprises a button SW1, one end of the button SW1 is grounded, and the other end of the button SW1 is connected with the third pin of the singlechip U1 as the scaling information output end of the scaling circuit 700.
In this embodiment, the photo-sensitive tube Q2 is preferably sensitive to light of type YL3NTSTK31IC-C, which has good uniformity and stability of sensitivity against temperature changes compared to a photo-resistor. As shown in fig. 1, the photosensitive tube Q2, the current limiting resistor R7 and the voltage dividing resistor R8 work together to convert the collected light signal of the ambient light into an analog electrical signal recognizable by the single chip microcomputer U1.
The load driving circuit 400 includes any one or more of a boosting driving circuit for boosting control of the load LED lamp, a step-down driving circuit for step-down control of the load LED lamp, a step-up/step-down driving circuit for step-up/step-down control of the load LED lamp, and a resistance current limiting circuit for limiting a load voltage of the load LED lamp,
as shown in fig. 3 and fig. 1, the boost driving circuit includes a boost driving chip U1, a polar capacitor EC1, EC2, a capacitor C1, C4, C6, C7, a resistor R1, R2, R3, R4, R5, R6, R7, an inductor L1, a diode DV1, a diode VD1, a zener diode DZ1, and a diode DZ2, a cathode of the polar capacitor EC1 is grounded, and an anode is connected to an output terminal of the rectifying anti-reverse circuit 100 as an input terminal of the boost driving circuit; the capacitor C1 is connected in parallel with two ends of the polar capacitor EC 1;
one end of the inductor L1 is connected with the anode of the polar capacitor EC1, the other end of the inductor L1 is connected with the anode of the diode DV1, and the cathode of the diode DV1 is used as the positive output end of the boost driving circuit and is connected with the anode of the load LED lamp;
one end of the resistor R1 is connected with the anode of the polar capacitor EC1, and the other end of the resistor R1 is connected with the eighth end of the boosting driving chip U1; one end of the capacitor C4 is connected with the eighth end of the boosting driving chip U1, and the other end of the capacitor C4 is grounded;
one end of the resistor R2 is connected with the anode of the diode DV1, the other end of the resistor R2 is connected with the fifth end of the boosting driving chip U1, and the EP port of the boosting driving chip U1 is in short circuit with the fifth end of the boosting driving chip U1;
the second end of the boosting driving chip U1 is connected with the output end of the driving control circuit for outputting the driving signal;
the first end of the boosting driving chip U1 is grounded; one end of the capacitor C6 is connected with the seventh end of the boost driving chip U1, and the other end of the capacitor C6 is connected with the first end of the boost driving chip U1;
one end of the capacitor C7 is connected with the third end of the boost driving chip U1, and the other end of the capacitor C7 is grounded;
one end of the resistor R7 is connected with the sixth end of the boosting driving chip U1, and the other end of the resistor R7 is grounded;
the resistor R6 is connected in parallel at two ends of the resistor R7;
one end of the resistor R3 is connected with the fourth end of the boosting driving chip U1, and the other end of the resistor R3 is used as the negative output end of the boosting driving circuit and is connected with the negative electrode of the load LED lamp;
the anode of the diode VD1 is connected in series with the resistor R3 and then connected to the fourth terminal of the boost driving chip U1, and the cathode of the diode VD1 is grounded;
two ends of the resistor R5 are connected in parallel between the anode and the cathode of the diode VD 1;
the resistor R4 is connected in parallel at two ends of the resistor R5;
the anode of the zener diode DZ2 is connected to the fourth terminal of the boost driving chip U1, the cathode is connected to the anode of the zener diode DZ1, and the cathode of the zener diode DZ1 is connected to the cathode of the diode DV 1.
The first end to the eighth end of the boost driver chip U1 correspond to the numbers "1" - "8" marked on both sides of the boost driver chip U1 in fig. 3, respectively.
The chip model of the boost driving chip U1 is preferably TX 6120B.
As shown in fig. 4, the step-down driving circuit includes a step-down driving chip U2, a capacitor C2, C3, C5, a resistor RS1, an RS2, an inductor L2, and a diode DV2, wherein one end of the resistor RS1 is connected to the fifth end of the step-down driving chip U2 and serves as the input end of the step-down driving circuit to be connected to the output end of the tidying anti-reverse connection circuit, and the other end of the resistor RS1 is connected to the fourth end of the step-down driving chip U2 and serves as the positive output end of the step-down driving circuit to be connected to the positive electrode of the load LED lamp;
the resistor RS2 is connected in parallel at two ends of the resistor RS 1;
one end of the inductor L2 is used as the negative output end of the step-down driving circuit and is connected with the negative electrode of the load LED lamp, and the other end of the inductor L2 is connected with the first end of the step-down driving chip U2 and the positive electrode of the diode DV 2; the cathode of the diode DV2 is connected with the fifth end of the buck driving chip U2;
the second end of the buck driving chip U2 is grounded, and the third end of the buck driving chip U2 is used as a driving signal input end of the buck driving circuit and is connected with a driving signal output end of the driving control circuit;
the capacitor C5 is connected between the positive output end and the negative output end of the voltage reduction driving circuit;
one end of the capacitor C2 is connected with the input end of the voltage reduction driving circuit, and the other end is grounded;
one end of the capacitor C3 is connected to the input end of the step-down driving circuit, and the other end is grounded.
The first terminal to the fifth terminal of the buck driving chip U2 correspond to the numbers "1" - "5" marked on both sides of the buck driving chip U2 in fig. 4, respectively.
The chip model of the buck driving chip U2 is preferably MBI6657 GST.
As shown in fig. 5, the buck-boost driving circuit includes a buck-boost driving chip U3, a capacitor C8, C11, C13, C14, C15, C9, C10, a resistor R15, R16, R17, R8, R9, R10, R12, R13, R14, a polar capacitor EC3, a MOS transistor Q1, an inductor L3, and a zener diode D1,
the first end of the buck-boost driving chip U3 is used as the output end of the buck-boost driving circuit and is connected with the output end of the rectifying anti-reverse connection circuit, the first end of the buck-boost driving chip U3 is connected with one end of an inductor L3, the other end of the inductor L3 is connected with the anode of a voltage stabilizing diode D1, and the cathode of a voltage stabilizing diode D1 is used as the positive output end of the buck-boost driving circuit and is connected with the anode of the load LED lamp;
one end of the capacitor C8 is connected with the first end of the buck-boost driving chip U3, and the other end of the capacitor C8 is grounded;
the second end of the buck-boost driving chip U3 is used as a driving signal input end and is connected with a driving signal output end of the driving control signal circuit; the third end of the buck-boost driving chip U3 is suspended, and the fourth end is connected with the capacitor C11 in series and then grounded;
the sixth end of the buck-boost driving chip U3 is connected in series with the capacitor C14 and then grounded, the sixteenth end is connected in series with the capacitor C13 and then grounded, and the sixth end is sequentially connected in series with the resistor R15 and the resistor R16 and then grounded; an eighth end (ICTRL) of the buck-boost driving chip U3 is connected with a resistor R16 in series and then grounded, a twelfth end and a fifth end are grounded, a seventh end is connected with a resistor R17 in series and then grounded, and a fourteenth end is suspended;
the capacitor C15 is connected in parallel with two ends of the resistor R16;
the fifteenth end of the buck-boost driving chip U3 is connected with the gate of the MOS tube Q1, the drain of the MOS tube Q1 is connected with the anode of the voltage-stabilizing diode D1, the source of the MOS tube Q1 is connected with the resistor R9 in series and then connected with the thirteenth end of the buck-boost driving chip U3, and the source of the MOS tube Q1 is connected with the resistor R12 in series and then grounded;
one end of the resistor R8 is connected with the negative electrode of the voltage stabilizing diode D1, and the other end of the resistor R8 is connected with the resistor R10 in series, then is grounded and is connected to the ninth end of the buck-boost driving chip U3;
one end of the capacitor C9 is connected with the cathode of the voltage stabilizing diode D1, and the other end is grounded;
the positive electrode of the polar capacitor EC3 is connected with the negative electrode of the voltage stabilizing diode D1, and the negative electrode of the polar capacitor EC3 is connected with the tenth end of the buck-boost driving chip U3;
the capacitor C10 is connected in parallel with two ends of the polar capacitor EC 3;
one end of the resistor R14 is connected with the tenth end of the buck-boost driving chip U3, the other end of the resistor R14 is connected with the thirteenth end of the buck-boost driving chip U3 and serves as the negative output end of the buck-boost driving circuit to be connected with the negative electrode of the load LED lamp;
the resistor R13 is connected in parallel across the resistor R14.
The first end to the sixteenth end of the buck-boost driver chip U3 correspond to the numbers "1" - "16" marked on both sides of the buck-boost driver chip U3 in fig. 5, respectively, and fig. 7 is a pin diagram of the buck-boost driver chip U3.
The buck-boost driver chip U3 IS preferably IS 3957.
As shown in fig. 6, the resistance current-limiting circuit includes a MOS transistor Q2, a resistor R11, a capacitor C12, a light emitting diode DL1, a protection diode D2, a resistor RL1, an RL2, an RL3, an RL4, and an RL5, wherein the resistors RL1, RL2, RL3, RL4, and RL5 are connected in parallel to form a parallel resistor combination, one end of the parallel resistor combination is used as an input end of the resistance current-limiting circuit and connected to an output end of the rectifying anti-reverse circuit, the other end of the parallel resistor combination is connected to an anode of the light emitting diode DL1, and a cathode of the light emitting diode DL1 is connected to a drain of the MOS transistor Q2;
the source electrode of the MOS transistor Q2 is grounded, the grid electrode is connected with one end of a resistor R11 in series, and the other end of the resistor R11 is used as a driving signal input end of a resistor current-limiting circuit and is connected with a driving signal output end of a driving control circuit;
the anode of the protection diode D2 is connected with the source electrode of the MOS tube Q2, and the cathode of the protection diode D2 is connected with the drain electrode of the MOS tube Q2;
one end of the capacitor C12 is connected with the grid electrode of the MOS transistor Q2, and the other end of the capacitor C12 is connected with the source electrode of the MOS transistor Q2;
the anode of the light emitting diode DL1 is used as the negative output end of the resistance current limiting circuit and is connected with the cathode of the load LED lamp, and the cathode of the light emitting diode DL1 is used as the positive output end of the resistance current limiting circuit and is connected with the anode of the load LED lamp.
For the load differences and the usage scenarios driven by the boost driving circuit, the buck-boost driving circuit, and the resistance current limiting circuit, please refer to the following table a:
Figure BDA0003298306780000121
TABLE a
The invention also provides a light control device applying the light control circuit, which comprises a photosensitive sensor and load driving equipment, wherein the photosensitive sensor is arranged at the head position of a motor vehicle or a non-motor vehicle, the photosensitive probe faces the ground, the load driving equipment is arranged on a vehicle body, and a photosensitive sampling circuit in the photosensitive sensor and a rectifying anti-reverse circuit, a voltage stabilizing circuit, a driving control circuit, a load driving circuit, a storage circuit and a scaling circuit in the load driving equipment are mutually connected through circuits to form the light control circuit for controlling the lighting state of the load LED lamp according to a photosensitive signal sampled by the photosensitive sensor.
The calibration method of the light control device using the light control circuit and the control method of the lighting state of the load LED lamp provided by the invention are briefly described as follows:
1. a calibration method. After the light control device is normally powered on, under the ambient light requiring the brightness of the load LED, the key SW1 is pressed to enable the calibration potential of the calibration circuit to be short-circuited with the ground potential, the calibration circuit generates a single pulse signal, after the third pin of the singlechip U1 receives the single pulse signal, the sixth pin (LS) of the singlechip U1 reads the photosensitive signal collected by the photosensitive sampling circuit at the moment, the photosensitive signal is processed by the signal, and then the calibration information is sent to the serial input storage pin (the first end of the memory IC 2) of the memory IC2 through the fifth pin of the singlechip U1, so that the calibration process is completed. The vehicle owner may perform repeated scaling by the above-described scaling method, and the scaling information in the memory IC2 is automatically updated.
2. A method for controlling the lighting state of a load LED lamp. After calibration is completed, the photosensitive sampling circuit collects photosensitive signals, converts the collected photosensitive signals into electric signals and sends the electric signals to the single chip microcomputer U1, the single chip microcomputer U1 reads the photosensitive electric signals and reads calibration information stored in the memory IC2 (the photosensitive electric signals are read through the sixth pin, and the calibration information in the memory IC2 is read through the fourth pin), and the two data are compared. When the ambient light is lower than the calibration ambient light, the single chip microcomputer U1 sends a signal for enabling the load LED lamp to work, namely, a PWM signal with 100% duty ratio is output through a second pin of the single chip microcomputer U1, and after the PWM signal is output to the load LED lamp through the load driving circuit, the load LED lamp is lightened. The lighting intensity of the load LED lamp is controlled by the load driving circuit.
When the ambient light is higher than the calibration ambient light, the single chip microcomputer U1 sends out a signal for making the load LED lamp not work, namely a PWM signal with 0% duty ratio is output through a second pin of the single chip microcomputer U1, and after the PWM signal is output to the load LED lamp through the load driving circuit, the load LED lamp is turned off.
It should be understood that the above-described embodiments are merely preferred embodiments of the invention and the technical principles applied thereto. It will be understood by those skilled in the art that various modifications, equivalents, changes, and the like can be made to the present invention. However, such variations are within the scope of the invention as long as they do not depart from the spirit of the invention. In addition, certain terms used in the specification and claims of the present application are not limiting, but are used merely for convenience of description.

Claims (10)

1. A light control circuit is used for automatically controlling the lighting state of a load LED lamp according to a photosensitive signal acquired by a photosensitive sampling circuit, and is characterized in that the light control circuit comprises a rectifying anti-reverse connection circuit, a voltage stabilizing circuit, a drive control circuit, a load drive circuit, a storage circuit, a photosensitive sampling circuit and a scaling circuit, wherein the input end of the rectifying anti-reverse connection circuit is connected with the electric output end of a power supply, and the output end of the rectifying anti-reverse connection circuit is respectively connected with the input end of the voltage stabilizing circuit and the input end of the load drive circuit;
the output end of the voltage stabilizing circuit is connected with the input ends of the drive control circuit, the storage circuit and the photosensitive sampling circuit, and stable working voltage is provided for the three circuits;
the drive control circuit is electrically connected with the storage circuit, the photosensitive sampling circuit, the scaling circuit and the load drive circuit, and is used for receiving the scaling signal generated by the scaling circuit and storing the scaling information into a memory provided by the storage circuit, and is also used for reading the photosensitive signal sampled by the photosensitive sampling circuit and the scaling information stored in the memory and outputting a drive signal for controlling the lighting state of the load LED lamp;
the load driving circuit drives and changes the lighting state of the load LED lamp according to the driving signal output by the driving control circuit.
2. The light control circuit of claim 1, wherein the rectifying anti-reverse circuit is a diode D1, the anode of the diode D1 is used as the input terminal of the rectifying anti-reverse circuit to connect the electrical output terminal of the power supply, and the cathode of the diode D1 is used as the output terminal of the rectifying anti-reverse circuit.
3. The light control circuit of claim 1, wherein the voltage regulation circuit comprises a low dropout linear regulator IC1, a capacitor C1, a capacitor C2 and a resistor R2, one end of the resistor R2 is connected to the output end of the rectifying anti-reverse connection circuit as the input end of the voltage regulation circuit, and the other end is connected to the third end of the low dropout linear regulator IC 1; one end of the capacitor C1 is connected to the third terminal of the low dropout regulator IC1, the other end is connected to a first end of the low dropout regulator IC1, and the first end of the low dropout regulator IC1 is grounded; one end of the capacitor C2 is connected with the second end of the low dropout linear regulator IC1, and the other end is grounded; the second terminal of the low dropout regulator IC1 is used as the output terminal of the voltage stabilizing circuit.
4. The optical control circuit of claim 3, wherein the low dropout linear regulator IC1 has a chip model number TX52L33BTE/ME 6228.
5. The light control circuit as claimed in claim 1, wherein the driving control circuit comprises a single-chip microcomputer U1 and a capacitor C3, one end of the capacitor C3 is connected to a first pin of the single-chip microcomputer U1, and the other end is grounded; the first pin of the singlechip U1 is used as the input end of the drive control circuit to be connected with the output end of the voltage stabilizing circuit, the second pin is used as the output end of the drive signal, the third pin is connected with the calibration information output end of the calibration circuit, the fourth pin is connected with the calibration information reading end of the storage circuit, the fifth pin is connected with the calibration information storage end of the storage circuit, the sixth pin is connected with the photosensitive signal output end of the photosensitive sampling circuit, the seventh pin is suspended, and the eighth pin is grounded.
6. The light control circuit of claim 5, wherein the memory circuit comprises a memory IC2, resistors R3, R4 and a capacitor C4, a first terminal of the memory IC2 is used as the calibration information storage terminal of the memory circuit, the singlechip U1 stores the received calibration information from the calibration information storage terminal to the memory IC2 through a fifth pin of the singlechip U1,
the third end of the memory IC2 is used as the calibration information reading end of the storage circuit, and the single chip microcomputer U1 reads the calibration information from the memory IC2 through the calibration information reading end connected to the fourth pin of the single chip microcomputer U1;
the first end of the memory IC2 is connected in series with the resistor R4 and then connected with the output end of the voltage stabilizing circuit, and the third end of the memory IC2 is connected in series with the resistor R3 and then connected with the output end of the voltage stabilizing circuit;
the fifth end of the memory IC2 is grounded, two ends of the capacitor C4 are connected between the second end and the fourth end of the memory IC2, the fourth end of the memory IC2 is connected to the output end of the voltage stabilizing circuit, and the second end of the memory IC2 is grounded.
7. The light control circuit of claim 6, wherein the memory IC2 has a chip model number TX24C 02N.
8. The light control circuit according to claim 5, wherein the photosensitive sampling circuit comprises a photosensitive tube Q2, resistors R7, R8 and a capacitor C6, a first end of the photosensitive tube Q2 is connected to the output end of the voltage regulator circuit, and a second end is connected in series with the resistor R8 and then grounded; one end of the resistor R7 is connected to the second end of the photosensitive tube Q2, the other end of the resistor R7 is used as the photosensitive signal output end of the photosensitive sampling circuit and is connected to the sixth pin of the singlechip U1, and the singlechip U1 receives the photosensitive signal acquired by the photosensitive sampling circuit through the sixth pin.
9. The light control circuit of claim 5, wherein the scaling circuit comprises a button SW1, one end of the button SW1 is grounded, and the other end of the button SW1 is connected to the third pin of the single-chip U1 as the scaling information output terminal of the scaling circuit;
preferably, the load driving circuit comprises any one or more of a boosting driving circuit for boosting and controlling the load LED lamp, a step-down driving circuit for step-down and controlling the load LED lamp, a step-up and step-down driving circuit for step-up and step-down and step-up and step-down and step up and step down and step up and step down and step up and step down and step up and step down and step up and step down and step up and step down and step up and step down and step up and step down and step up and step down and step up and step down and step up and step down and step up and step down and step up and step down and step up,
the boost driving circuit comprises a boost driving chip U1, polar capacitors EC1, EC2, capacitors C1, C4, C6, C7, resistors R1, R2, R3, R4, R5, R6, R7, an inductor L1, a diode DV1, a diode VD1, a voltage stabilizing diode DZ1 and a DZ2, wherein the negative electrode of the polar capacitor EC1 is grounded, and the positive electrode of the polar capacitor EC1 is used as the input end of the boost driving circuit and connected with the output end of the rectification anti-reverse connection circuit; the capacitor C1 is connected in parallel across the polar capacitor EC 1;
one end of the inductor L1 is connected with the anode of the polar capacitor EC1, the other end of the inductor L1 is connected with the anode of the diode DV1, and the cathode of the diode DV1 is used as the positive output end of the boost driving circuit and is connected with the anode of the load LED lamp;
one end of the resistor R1 is connected with the anode of the polar capacitor EC1, and the other end of the resistor R1 is connected with the eighth end of the boosting driving chip U1; one end of the capacitor C4 is connected with the eighth end of the boost driving chip U1, and the other end of the capacitor C4 is grounded;
one end of the resistor R2 is connected with the anode of the diode DV1, the other end of the resistor R2 is connected with the fifth end of the boosting driving chip U1, and the EP port of the boosting driving chip U1 is in short circuit with the fifth end of the boosting driving chip U1;
the second end of the boosting driving chip U1 is connected with the output end of the driving control circuit for outputting the driving signal;
the first end of the boosting driving chip U1 is grounded; one end of the capacitor C6 is connected with the seventh end of the boost driving chip U1, and the other end of the capacitor C6 is connected with the first end of the boost driving chip U1;
one end of the capacitor C7 is connected with the third end of the boost driving chip U1, and the other end of the capacitor C7 is grounded;
one end of the resistor R7 is connected with the sixth end of the boosting driving chip U1, and the other end of the resistor R7 is grounded;
the resistor R6 is connected in parallel at two ends of the resistor R7;
one end of the resistor R3 is connected with the fourth end of the boosting driving chip U1, and the other end of the resistor R3 is used as the negative output end of the boosting driving circuit and is connected with the negative electrode of the load LED lamp;
the anode of the diode VD1 is connected in series with the resistor R3 and then connected to the fourth terminal of the boost driving chip U1, and the cathode of the diode VD1 is grounded;
two ends of the resistor R5 are connected in parallel between the anode and the cathode of the diode VD 1;
the resistor R4 is connected in parallel at two ends of the resistor R5;
the anode of the zener diode DZ2 is connected to the fourth terminal of the boost driving chip U1, the cathode is connected to the anode of the zener diode DZ1, and the cathode of the zener diode DZ1 is connected to the cathode of the diode DV 1;
preferably, the step-down driving circuit includes a step-down driving chip U2, a capacitor C2, C3, C5, a resistor RS1, an resistor RS2, an inductor L2, and a diode DV2, wherein one end of the resistor RS1 is connected to the fifth end of the step-down driving chip U2 and serves as the input end of the step-down driving circuit to be connected to the output end of the tidying anti-reverse connection circuit, and the other end of the resistor RS1 is connected to the fourth end of the step-down driving chip U2 and serves as the positive output end of the step-down driving circuit to be connected to the anode of the load LED lamp;
the resistor RS2 is connected in parallel at two ends of the resistor RS 1;
one end of the inductor L2 is used as a negative output end of the buck driving circuit and is connected with the negative electrode of the load LED lamp, and the other end of the inductor L2 is connected with the first end of the buck driving chip U2 and the positive electrode of the diode DV 2; the cathode of the diode DV2 is connected to the fifth terminal of the buck driving chip U2;
the second end of the buck driving chip U2 is grounded, and the third end of the buck driving chip U2 is used as the driving signal input end of the buck driving circuit and is connected with the driving signal output end of the driving control circuit;
the capacitor C5 is connected between the positive output terminal and the negative output terminal of the buck driving circuit;
one end of the capacitor C2 is connected with the input end of the voltage reduction driving circuit, and the other end of the capacitor C2 is grounded;
one end of the capacitor C3 is connected with the input end of the voltage reduction driving circuit, and the other end of the capacitor C3 is grounded;
preferably, the buck-boost driving circuit comprises a buck-boost driving chip U3, capacitors C8, C11, C13, C14, C15, C9, C10, resistors R15, R16, R17, R8, R9, R10, R12, R13, R14, a polar capacitor EC3, a MOS tube Q1, an inductor L3 and a voltage stabilizing diode D1,
a first end of the buck-boost driving chip U3 is used as an output end of the buck-boost driving circuit and connected with an output end of the rectifying anti-reverse connection circuit, the first end of the buck-boost driving chip U3 is connected with one end of the inductor L3, the other end of the inductor L3 is connected with an anode of the voltage stabilizing diode D1, and a cathode of the voltage stabilizing diode D1 is used as a positive output end of the buck-boost driving circuit and connected with an anode of the load LED lamp;
one end of the capacitor C8 is connected with the first end of the buck-boost driving chip U3, and the other end of the capacitor C8 is grounded;
a second end of the buck-boost driving chip U3 is used as a driving signal input end and is connected with a driving signal output end of the driving control signal circuit; the third end of the buck-boost driving chip U3 is suspended, and the fourth end of the buck-boost driving chip U3 is connected in series with the capacitor C11 and then grounded;
the sixth end of the buck-boost driving chip U3 is connected in series with the capacitor C14 and then grounded, the sixteenth end of the buck-boost driving chip U3 is connected in series with the capacitor C13 and then grounded, and the sixth end of the buck-boost driving chip U3 is connected in series with the resistor R15 and the resistor R16 in sequence and then grounded; the eighth end of the buck-boost driving chip U3 is connected in series with the resistor R16 and then grounded, the twelfth end and the fifth end are grounded, the seventh end is connected in series with the resistor R17 and then grounded, and the fourteenth end is suspended;
the capacitor C15 is connected in parallel with two ends of the resistor R16;
a fifteenth end of the buck-boost driving chip U3 is connected to the gate of the MOS transistor Q1, a drain of the MOS transistor Q1 is connected to the anode of the zener diode D1, a source of the MOS transistor Q1 is connected in series with the resistor R9, then connected to a thirteenth end of the buck-boost driving chip U3, and connected in series with the resistor R12, and then grounded;
one end of the resistor R8 is connected with the negative electrode of the zener diode D1, and the other end of the resistor R8 is connected in series with the resistor R10, then is grounded and is connected to the ninth end of the buck-boost driving chip U3;
one end of the capacitor C9 is connected with the cathode of the voltage stabilizing diode D1, and the other end of the capacitor C9 is grounded;
the anode of the polar capacitor EC3 is connected with the cathode of the zener diode D1, and the cathode of the polar capacitor EC3 is connected with the tenth end of the buck-boost driving chip U3;
the capacitor C10 is connected in parallel across the polar capacitor EC 3;
one end of the resistor R14 is connected with the tenth end of the buck-boost driving chip U3, the other end of the resistor R14 is connected with the thirteenth end of the buck-boost driving chip U3 and serves as a negative output end of the buck-boost driving circuit to be connected with the negative electrode of the load LED lamp;
the resistor R13 is connected in parallel at two ends of the resistor R14;
preferably, the chip model of the boosting driving chip U1 is TX 6210B; the chip model of the voltage reduction driving chip U2 is MBI6657 GST; the chip model of the buck-boost driving chip U3 IS 3957;
preferably, the resistance current-limiting circuit comprises a MOS transistor Q2, a resistor R11, a capacitor C12, a light-emitting diode DL1, a protection diode D2, a resistor RL1, an RL2, an RL3, an RL4 and an RL5, wherein the resistors RL1, RL2, RL3, RL4 and RL5 are connected in parallel to form a parallel resistor combination, one end of the parallel resistor combination is used as an input end of the resistance current-limiting circuit and connected with an output end of the rectifying anti-reverse connection circuit, the other end of the parallel resistor combination is connected with an anode of the light-emitting diode DL1, and a cathode of the light-emitting diode DL1 is connected with a drain of the MOS transistor Q2;
the source electrode of the MOS transistor Q2 is grounded, the grid electrode of the MOS transistor Q2 is connected in series with one end of the resistor R11, and the other end of the resistor R11 is used as the driving signal input end of the resistor current-limiting circuit and is connected with the driving signal output end of the driving control circuit;
the anode of the protection diode D2 is connected with the source electrode of the MOS transistor Q2, and the cathode of the protection diode D2 is connected with the drain electrode of the MOS transistor Q2;
one end of the capacitor C12 is connected with the grid electrode of the MOS transistor Q2, and the other end of the capacitor C12 is connected with the source electrode of the MOS transistor Q2;
the anode of the light emitting diode DL1 is used as the negative output end of the resistance current limiting circuit and is connected with the cathode of the load LED lamp, and the cathode of the light emitting diode DL1 is used as the positive output end of the resistance current limiting circuit and is connected with the anode of the load LED lamp.
10. A light control device using a light control circuit is characterized by comprising a photosensitive sensor and a load driving device, wherein the photosensitive sensor is arranged at the head of a motor vehicle or a non-motor vehicle, the photosensitive probe faces the ground, the load driving device is arranged on a vehicle body, and a photosensitive sampling circuit in the photosensitive sensor and a rectifying anti-reverse circuit, a voltage stabilizing circuit, a driving control circuit, a load driving circuit, a storage circuit and a scaling circuit in the load driving device are mutually connected in a circuit manner to form the light control circuit which is used for controlling the lighting state of a load LED lamp according to a photosensitive signal sampled by the photosensitive sensor according to any one of claims 1 to 9.
CN202111183595.5A 2021-08-13 2021-10-11 Light control circuit and light control device using same Active CN113873710B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110932857 2021-08-13
CN2021109328577 2021-08-13

Publications (2)

Publication Number Publication Date
CN113873710A true CN113873710A (en) 2021-12-31
CN113873710B CN113873710B (en) 2024-03-08

Family

ID=78998431

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111183595.5A Active CN113873710B (en) 2021-08-13 2021-10-11 Light control circuit and light control device using same

Country Status (1)

Country Link
CN (1) CN113873710B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103298221A (en) * 2013-07-01 2013-09-11 湖南工业大学 Dimming circuit and method of LED (Light Emitting Diode) lighting lamp
CN105873271A (en) * 2016-04-01 2016-08-17 成都昂迪加科技有限公司 Multifunctional light-controlled energy-saving system with high sensitivity for multi-circuit LED lamp
WO2018209795A1 (en) * 2017-05-17 2018-11-22 周后瑾 Light-operated led filament lamp driving system, light-operated led filament lamp and control method therefor
CN111148320A (en) * 2020-01-14 2020-05-12 浙江阳光美加照明有限公司 Light control circuit of LED lamp

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103298221A (en) * 2013-07-01 2013-09-11 湖南工业大学 Dimming circuit and method of LED (Light Emitting Diode) lighting lamp
CN105873271A (en) * 2016-04-01 2016-08-17 成都昂迪加科技有限公司 Multifunctional light-controlled energy-saving system with high sensitivity for multi-circuit LED lamp
WO2018209795A1 (en) * 2017-05-17 2018-11-22 周后瑾 Light-operated led filament lamp driving system, light-operated led filament lamp and control method therefor
CN111148320A (en) * 2020-01-14 2020-05-12 浙江阳光美加照明有限公司 Light control circuit of LED lamp

Also Published As

Publication number Publication date
CN113873710B (en) 2024-03-08

Similar Documents

Publication Publication Date Title
EP3984333B1 (en) Led flashing circuit
CN110281839B (en) Automobile high beam and low beam automatic control system based on Bluetooth technology
TWI477192B (en) Dc dimming led driving circuit
US10070494B1 (en) Dimming switch device and methods for determining user operation events thereof
KR101998826B1 (en) LED Street Apparatus of Dimming Control
CN113873710B (en) Light control circuit and light control device using same
CN107914636A (en) Vehicle-mounted light adjusting controller
CN217904711U (en) Intelligent street lamp controller
EP2224789A1 (en) Device and method for dimming light sources
CN213818264U (en) Dimming control circuit and device
CN115442940A (en) LED lamp power supply
CN112004278A (en) PWM-controlled stroboflash-free dimming and color-adjusting LED driving circuit and LED driving power supply
CN211457466U (en) Multi-channel output compatible circuit of backlight constant-current control system and television
CN210629914U (en) Capacitor pre-charging circuit, LED drive circuit and LED device
CN203206567U (en) LED lamp adjustment and control system
CN110493914A (en) A kind of car light constant current driving device and its manufacturing method
CN213126532U (en) PWM-controlled stroboflash-free dimming and color-adjusting driving circuit and driving power supply
CN215379294U (en) Working lamp and driving circuit thereof
CN215991272U (en) LED output adjustment drive circuit and LED lamp
CN217037502U (en) LED road lighting circuit for automatic light supplement
CN213814373U (en) Equipment controller
CN210868263U (en) Intelligent small lamp control circuit
CN216357392U (en) Output current control circuit and system
CN216437527U (en) Linear induction control circuit and LED lamp
CN111867185A (en) Capacitor pre-charging circuit, LED drive circuit and LED device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant