CN219577304U - LED drive circuit and LED lamp - Google Patents
LED drive circuit and LED lamp Download PDFInfo
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- CN219577304U CN219577304U CN202223123359.7U CN202223123359U CN219577304U CN 219577304 U CN219577304 U CN 219577304U CN 202223123359 U CN202223123359 U CN 202223123359U CN 219577304 U CN219577304 U CN 219577304U
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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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The utility model relates to the technical field of illumination, and discloses an LED driving circuit and an LED lamp. The LED driving circuit comprises an LED load group, a constant current driving circuit, a communication circuit and a dimming circuit; the LED load group comprises a first color temperature load, a second color temperature load and a third color temperature load which are mutually connected in parallel; the constant current driving circuit is connected with the high-voltage direct current and drives the LED load group connected with the high-voltage direct current; the communication circuit receives a color temperature adjusting signal sent from the outside and sends the color temperature adjusting signal to the dimming circuit, and the color temperature adjusting signal represents real-time sunlight color temperature parameters; and the dimming circuit is connected with the constant current driving circuit, receives the color temperature adjusting signal, and respectively controls the load currents flowing through the first color temperature load, the second color temperature load and the third color temperature load according to the color temperature adjusting signal so as to adjust the color temperature of the mixed color of the LED load group. The embodiment of the utility model can overcome the defect that the color temperature can not be adjusted according to the illumination color temperature of the external environment.
Description
Technical Field
The utility model relates to the technical field of illumination, in particular to an LED driving circuit and an LED lamp.
Background
In the field of LED lighting, dimming and toning temperature have been the focus of attention. Dimming is the adjustment of the brightness of a light source; the term "color temperature" is used to refer to the temperature of a black body when the color of light emitted from a light source is the same as the color of the light emitted from the black body at a certain temperature, and the color of light varies depending on the temperature in the black body irradiation.
However, the scheme in the field of dimming and color temperature adjustment of the LED lamp in the prior art can only perform illumination work according to a preset illumination program, and cannot be adjusted according to the illumination color temperature of the external environment.
Disclosure of Invention
The utility model aims to provide an LED driving circuit and an LED lamp, which aim to solve the problem that color temperature adjustment cannot be carried out according to illumination color temperature of external environment.
In a first aspect, an LED driving circuit is provided, including an LED load group, a constant current driving circuit, a communication circuit, and a dimming circuit;
the LED load group is connected with high-voltage direct current and comprises a first color temperature load, a second color temperature load and a third color temperature load which are mutually connected in parallel;
the constant-current driving circuit is connected with the LED load group, is connected with the high-voltage direct current and drives the LED load group connected with the high-voltage direct current;
the communication circuit is connected with the dimming circuit, receives a color temperature adjusting signal sent from the outside and sends the color temperature adjusting signal to the dimming circuit, and the color temperature adjusting signal represents real-time sunlight color temperature parameters;
and the dimming circuit is connected with the constant current driving circuit, receives the color temperature adjusting signal, and respectively controls the load currents flowing through the first color temperature load, the second color temperature load and the third color temperature load according to the color temperature adjusting signal so as to adjust the color temperature of the mixed color of the LED load group.
In some embodiments, the constant current drive circuit includes a power supply chip, a first switching device, a second switching device, and a third switching device;
the power chip is provided with a first output port, a second output port and a third output port;
the first color temperature load, the first switching device and the first output port are sequentially connected, the second color temperature load, the second switching device and the second output port are sequentially connected, and the third color temperature load, the third switching device and the third output port are sequentially connected;
the dimming circuit is respectively connected with the first switching device, the second switching device and the third switching device, and the dimming circuit respectively controls the opening degrees of the first switching device, the second switching device and the third switching device according to the color temperature adjusting signal.
In some embodiments, the constant current drive circuit further includes a current setting sub-circuit, a voltage dividing sub-circuit, and a voltage setting sub-circuit;
the power chip is provided with a current setting port, a power input port and an overvoltage detection port;
the current setting port is connected with one end of the current setting sub-circuit, and the other end of the current setting sub-circuit is grounded; the power input port is connected with one end of the voltage dividing sub-circuit, and the other end of the voltage dividing sub-circuit is connected with high-voltage direct current; the first end of the voltage setting sub-circuit is connected with high-voltage direct current, the second end of the voltage setting sub-circuit is grounded, and the overvoltage detection port is connected with the third end of the voltage setting sub-circuit.
In some embodiments, the first switching device, the second switching device, and the third switching device are transistors or MOS transistors.
In some embodiments, the dimming circuit includes three dimming sub-circuits;
the first dimming sub-circuit receives the first color temperature adjusting signal, outputs a first control signal according to the first color temperature adjusting signal, and adjusts the brightness of the first color temperature load according to the duty ratio of the first control signal;
the second dimming sub-circuit receives a second color temperature adjusting signal and outputs a second control signal according to the second color temperature adjusting signal, and the second control signal adjusts the brightness of a second color temperature load according to the duty ratio of the second control signal;
the third dimming sub-circuit receives the third color temperature adjusting signal, outputs a third control signal according to the third color temperature adjusting signal, and adjusts the brightness of the third color temperature load according to the duty ratio of the third control signal.
In some embodiments, the dimming sub-circuit includes a dimming chip and an optocoupler device;
the dimming chip is provided with a starting port, a dimming input port, a dimming output port and a power supply port;
the starting port is connected with high-voltage direct current;
the dimming input port is connected with the communication circuit and receives the first color temperature adjusting signal, the second color temperature adjusting signal or the third color temperature adjusting signal;
the power supply port is connected with the anode of the diode of the optical coupler, the dimming output port is connected with the cathode of the diode of the optical coupler, the triode of the optical coupler is connected with the constant current driving circuit, and the dimming chip outputs a first control signal, a second control signal or a third control signal through the optical coupler.
In some embodiments, the communication circuit is a wired communication module or a wireless communication module.
In some embodiments, the LED driving circuit further comprises an input rectifying circuit;
and the input rectifying circuit is connected with external alternating current, and converts the external alternating current into high-voltage direct current suitable for the LED driving circuit to output.
In some embodiments, the input rectifying circuit includes an overcurrent protection subcircuit, a rectifying device, and an input filtering subcircuit;
the first input end of the overcurrent protection sub-circuit is used for being connected with a live wire, the second input end of the overcurrent protection sub-circuit is used for being connected with a zero line, the first output end of the overcurrent protection sub-circuit is connected with the first input end of the rectifying device, the second output end of the overcurrent protection sub-circuit is connected with the second input end of the rectifying device, the first output end of the rectifying device is connected with the input end of the input filter sub-circuit, the second output end of the rectifying device is grounded through the input filter sub-circuit, and the output ends of the input filter sub-circuit are respectively connected with the LED load group and the constant current driving circuit.
In a second aspect, there is provided an LED lamp comprising the LED driving circuit of the first aspect.
The utility model has the beneficial effects that: the color temperature adjusting signals representing real-time sunlight color temperature parameters are obtained from the outside, and then the load currents of the LED loads of the three color lights are respectively adjusted by the dimming circuit according to the color temperature adjusting signals, so that the LED loads of the three different color temperatures are respectively in different luminous states, the color temperature of mixed light obtained by mixing the three color lights is similar to the real-time sunlight color temperature parameters, and the effect of adjusting the color temperature of the LED loads according to the illumination color temperature of the external environment is achieved.
Drawings
Fig. 1 is a schematic diagram of an LED driving circuit according to a first embodiment of the present utility model.
Fig. 2 is a schematic structural diagram of an LED driving circuit according to a second embodiment of the present utility model.
Fig. 3 is a schematic structural diagram of a dimmer sub-circuit according to an embodiment of the present utility model.
Fig. 4 is a schematic diagram of an input rectifying circuit according to an embodiment of the present utility model.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the present utility model will be further described with reference to the embodiments and the accompanying drawings.
In the description of the present utility model, the meaning of a number is not quantitative, and the meaning of a number is two or more, and greater than, less than, exceeding, etc. are understood to exclude the present number, and the meaning of above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present utility model, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that elements are listed and may include other elements not expressly listed.
In the field of LED lighting, dimming and toning temperature have been the focus of attention. Dimming is the adjustment of the brightness of a light source; the term "color temperature" is used to refer to the temperature of a black body when the color of light emitted from a light source is the same as the color of the light emitted from the black body at a certain temperature, and the color of light varies depending on the temperature in the black body irradiation.
For LED dimming, two main solutions are to linearly adjust the current of the LED (analog dimming) or to switch the driving current back and forth from 0 to the target current value at high frequencies (digital dimming). Setting the cycle and duty cycle using Pulse Width Modulation (PWM) is the simplest method to achieve digital dimming. The principle of PWM dimming is: the external PWM signal changes the duty ratio of the constant current source output to adjust the effective value of the LED driving current, thereby realizing dimming.
The prior scheme for adjusting light and color temperature: the driving power supply firstly generates a constant current source, two independent PWM signals are generated at the output end of the dimming and color temperature adjusting circuit by a controller, one PWM signal controls one warm light lamp string (for example, the warm light lamp string and about 3000k color temperature), the other PWM signal controls one cold light lamp string (for example, the cold light lamp string and about 7000k color temperature), the duty ratio of each PWM is respectively adjusted to change the effective value of current so as to change the brightness proportion of the warm light lamp string and the cold light lamp string, and the whole LED lamp can be simultaneously used for dimming and color temperature adjusting according to the design.
However, the schemes in the field of dimming and color temperature adjustment of the LED lamp in the prior art are all to perform illumination work according to a preset illumination program, and the adjustment function is simple and cannot be adjusted according to the illumination color temperature of the external environment.
Based on the above, the utility model provides the LED driving circuit and the LED lamp, which are used for adjusting the load current of LED loads with different color temperatures based on the color temperature dimming signal by receiving the external color temperature dimming signal, so that the effect of adjusting the color temperature according to the illumination color temperature of the external environment is realized, and the adjusting flexibility is strong.
According to a first aspect of the present utility model, there is provided an LED driving circuit.
As shown in fig. 1, the LED driving circuit includes an LED load group, a constant current driving circuit 200, a communication circuit 300, and a dimming circuit 400.
The LED load group is connected to the high-voltage direct current, and includes a first color temperature load 110, a second color temperature load 120 and a third color temperature load 130 connected in parallel.
Referring to fig. 1 to 4, v DB Is high voltage direct current.
The constant current driving circuit 200 is connected with the LED load group, and the constant current driving circuit 200 is connected with the high-voltage direct current and drives the LED load group connected with the high-voltage direct current.
Specifically, the input end of the first color temperature load 110, the input end of the second color temperature load 120 and the input end of the third color temperature load 130 are respectively connected with high-voltage direct current, the output end of the first color temperature load 110, the output end of the second color temperature load 120 and the output end of the third color temperature load 130 are respectively connected with different driving ports of the constant-current driving circuit 200, the constant-current driving circuit 200 is connected with the high-voltage direct current and is electrified and started, and the constant-current driving circuit 200 after the electrification and the startup constantly passes through the load current of the LED load, so that the first color temperature load 110, the second color temperature load 120 and the third color temperature load 130 are electrified and emit light.
The communication circuit 300 is connected to the dimming circuit 400, and the communication circuit 300 is configured to receive a color temperature adjustment signal transmitted from the outside and transmit the color temperature adjustment signal to the dimming circuit 400. The color temperature adjustment signal characterizes real-time solar color temperature parameters.
Specifically, the communication circuit 300 communicates with an external terminal, receives a color temperature adjustment signal from the external terminal, and transmits the color temperature adjustment signal to the dimming circuit 400.
The dimming circuit 400 is connected to the constant current driving circuit 200, and the dimming circuit 400 is configured to receive a color temperature adjustment signal, and control load currents flowing through the first color temperature load 110, the second color temperature load 120, and the third color temperature load 130 according to the color temperature adjustment signal, so as to adjust the color mixing color temperature of the LED load group.
Specifically, the dimming circuit 400 adjusts the load currents of the first color temperature load 110, the second color temperature load 120 and the third color temperature load 130 after receiving the color temperature adjusting signal, and adjusts the load currents of the first color temperature load 110, the second color temperature load 120 and the third color temperature load 130 to the current values corresponding to the color temperature adjusting signal, so that the first color temperature load 110, the second color temperature load 120 and the third color temperature load 130 are respectively in different light emitting states, and the color temperature of the mixed light obtained by mixing the three color lights approximates to the real-time sunlight color temperature parameter.
It can be understood that the communication module obtains a color temperature adjusting signal from the outside, the color temperature adjusting signal carries data about a sunlight color temperature parameter, and the real-time sunlight color temperature parameter characterizes a color temperature parameter of sunlight at a current moment in a certain region. The communication module is used for communicating with an external terminal, the external terminal can acquire the color temperature parameter of the sunlight at the current moment in a certain area in real time, the current time information and the weather information of the area can be acquired, the color temperature parameter of the sunlight conforming to the acquired time information and weather information can be selected from a historical database, the current real-time sunlight image of the area can also be acquired, the color temperature parameter of the sunlight at the current moment is determined through an image recognition technology, the color temperature parameter of the sunlight at the current moment is converted into a corresponding color temperature adjusting signal, and the color temperature adjusting signal is sent to the communication module.
The above-mentioned LED driving circuit obtains the color temperature adjusting signal representing the real-time solar color temperature parameter from the outside, and then the dimming circuit 400 adjusts the load current of the LED loads of the three color lights according to the color temperature adjusting signal, so that the LED loads of the three different color temperatures are respectively in different light emitting states, the color temperature of the mixed light obtained by mixing the three color lights approximates to the real-time solar color temperature parameter, and the effect of adjusting the color temperature of the LED load according to the illumination color temperature of the external environment is achieved.
The present utility model will be described in further detail with reference to specific examples.
As shown in fig. 2, in an embodiment, the constant current driving circuit 200 includes a power supply chip 240, a first switching device 210, a second switching device 220, and a third switching device 230.
The power chip 240 has a first output port, a second output port, and a third output port.
Referring to fig. 2, out1 is a first output port, OUT2 is a second output port, and OUT3 is a third output port.
The first color temperature load 110, the first switching device 210, and the first output port are sequentially connected, the second color temperature load 120, the second switching device 220, and the second output port are sequentially connected, and the third color temperature load 130, the third switching device 230, and the third output port are sequentially connected. The dimming circuit 400 is connected to the first, second and third switching devices 210, 220 and 230, respectively, and the dimming circuit 400 controls the turn-on degrees of the first, second and third switching devices 210, 220 and 230, respectively, according to the color temperature adjustment signal.
In this embodiment, the power chip 240 is an SM2315E linear constant current driving chip.
Specifically, the input end of the first color temperature load 110, the input end of the second color temperature load 120 and the input end of the third color temperature load 130 are respectively connected with high-voltage direct current, the output end of the first color temperature load 110 is connected with the first end of the first switching device 210, the second end of the first switching device 210 is connected with the first output port, the output end of the second color temperature load 120 is connected with the first end of the second switching device 220, the second end of the second switching device 220 is connected with the second output port, the output end of the third color temperature load 130 is connected with the first end of the third switching device 230, and the second end of the third switching device 230 is connected with the third output port. When the first switch device 210, the second switch device 220 and the third switch device 230 are turned on, the first color temperature load 110, the second color temperature load 120 and the third color temperature load 130 are respectively communicated with different output ports of the power chip 240 to form different light emitting branches, and the power chip 240 is used for realizing separate driving without electrolytic capacitors, so that the requirements of regulatory harmonic waves can be met, and the electric energy utilization rate is improved.
In some embodiments, the first switching device 210, the second switching device 220, and the third switching device 230 are transistors or MOS transistors.
It is understood that each group of LED loads includes one LED light bead or at least two LED light beads, and the user can set according to actual requirements. When two or more LED lamp beads are arranged in the LED load, the LED lamp beads are connected in series or in parallel, so that the flexibility is high, and the brightness of the lamp can be effectively improved.
Referring again to fig. 2, in one embodiment, the constant current drive circuit 200 further includes a current setting sub-circuit 270, a voltage dividing sub-circuit 250, and a voltage setting sub-circuit 260.
The power chip 240 has a current setting port, a power input port, and an overvoltage detection port.
Referring to fig. 2, rext is a current set port, VIN is a power input port, and OVP is an overvoltage detection port.
The current setting port is connected with one end of the current setting sub-circuit 270, and the other end of the current setting sub-circuit 270 is grounded; the power input port is connected with one end of the voltage dividing sub-circuit 250, and the other end of the voltage dividing sub-circuit 250 is connected with high-voltage direct current; the first terminal of the voltage setting sub-circuit 260 is connected to the high voltage direct current, the second terminal of the voltage setting sub-circuit 260 is grounded, and the overvoltage detection port is connected to the third terminal of the voltage setting sub-circuit 260.
The current setting subcircuit 270 is used to set the current level of the current setting port. The voltage divider sub-circuit 250 is used for setting an overvoltage protection setting range of the overvoltage detection port, and the voltage setting sub-circuit 260 is of a resistor divider structure, and uses a series resistor to divide the high-voltage direct current.
The power chip 240 is connected to external voltage through the power input port and is electrified to start, after the power chip 240 is started, the current value of the load current passing through the LED load group is controlled according to the resistance value of the external circuit of the current setting port, so that the light-emitting brightness of the LED load group is controlled, the power chip 240 detects the input high-voltage direct current through the overvoltage detection port, and then whether the high-voltage direct current exceeds an overvoltage protection setting range is judged.
More specifically, the voltage divider circuit 250 includes a first resistor R1, the power input port is connected to the high-voltage dc through the first resistor R1, the first resistor R1 performs a voltage division function to adapt the low-voltage dc after voltage division to the power input port, the voltage setting sub-circuit 260 includes a second resistor R2 and a third resistor R3, one end of the second resistor R2 is connected to the high-voltage dc, the other end of the second resistor R2 is connected to one end of the overvoltage detection port and one end of the third resistor R3, the other end of the third resistor R3 is grounded, the second resistor R2 and the third resistor R3 form a resistor voltage divider, and different overvoltage protection thresholds can be set by setting resistance parameters of the second resistor R2 and the third resistor R3.
As shown in fig. 3, in one embodiment, dimming circuit 400 includes three dimming sub-circuits 410.
The first dimming sub-circuit 410 receives the first color temperature adjustment signal and outputs a first control signal according to the first color temperature adjustment signal, and the first control signal adjusts the brightness of the first color temperature load 110 according to its duty cycle. The second dimming sub-circuit 410 receives the second color temperature adjustment signal and outputs a second control signal according to the second color temperature adjustment signal, the second control signal adjusting the brightness of the second color temperature load 120 according to its duty cycle. The third dimming sub-circuit 410 receives the third temperature adjustment signal and outputs a third control signal according to the third temperature adjustment signal, the third control signal adjusting the brightness of the third temperature load 130 according to its duty cycle.
In this embodiment, the first control signal, the second control signal and the third control signal are pulse width modulation signals, and the three dimming sub-circuits 410 respectively output pulse width modulation signals with a duty ratio of 1% -100% to the constant current driving circuit 200, where the duty ratio of the pulse width modulation signals corresponds to the light emitting adjustment ratio of the LED load group, so as to realize stepless color temperature adjustment control of the LED load.
As shown in fig. 4, in one embodiment, the dimmer sub-circuit 410 includes a dimmer chip 411 and an optocoupler 412.
The dimming chip 411 has a start port, a dimming input port, a dimming output port, and a power supply port.
Referring to fig. 3, hv is a start port, DIM is a dimming input port, OUT is a dimming output port, VCC is a power supply port, and VDD is a dc voltage.
The starting port is connected with high-voltage direct current, the dimming input port is connected with the communication circuit 300, the first color temperature adjusting signal, the second color temperature adjusting signal or the third color temperature adjusting signal is received, the power supply port is connected with the anode of the diode of the optocoupler 412, the dimming output port is connected with the cathode of the diode of the optocoupler 412, the triode of the optocoupler 412 is connected with the constant current driving circuit 200, and the dimming chip 411 outputs the first control signal, the second control signal or the third control signal through the optocoupler 412.
In this embodiment, the dimming chip 411 is a BP5001 chip.
The dimming chip 411 is connected to the constant current driving circuit 200 through an optocoupler 412, and adjusts the light emission intensity of the diode of the optocoupler 412 according to the color temperature dimming signal received from the communication circuit 300, thereby providing the first control signal, the second control signal, or the third control signal to the constant current driving circuit 200.
The dimming input port is connected to the communication circuit 300, the power supply port is connected to the anode of the diode of the optocoupler 412, the dimming output port is connected to the anode of the diode of the optocoupler 412, one end of the triode of the optocoupler 412 is connected to the dc voltage and the control end of the first switching device 210, the control end of the second switching device 220 or the control end of the third switching device 230, respectively, and the other end of the triode of the optocoupler 412 is grounded. The dimming chip 411 receives the color temperature adjustment signal from the communication circuit 300, triggers the optocoupler 412, and outputs a pulse width modulation signal to the first switching device 210, the second switching device 220, or the third switching device 230 through the optocoupler 412, thereby adjusting the load current flowing through the first color temperature load 110, the second color temperature load 120, and/or the third color temperature load 130.
In some embodiments, the communication circuit 300 is a wired communication module or a wireless communication module.
As shown in fig. 4, in an embodiment, the LED driving circuit further includes an input rectifying circuit 500.
The input rectifying circuit 500 is connected with external alternating current, and converts the external alternating current into high-voltage direct current suitable for the LED driving circuit to output.
More specifically, the input rectifying circuit 500 includes an overcurrent protection sub-circuit 510, a rectifying device 520, and an input filtering sub-circuit 530. The first input end of the overcurrent protection sub-circuit 510 is used for being connected with a live wire, the second input end of the overcurrent protection sub-circuit 510 is used for being connected with a zero line, the first output end of the overcurrent protection sub-circuit 510 is connected with the first input end of the rectifying device 520, the second output end of the overcurrent protection sub-circuit 510 is connected with the second input end of the rectifying device 520, the first output end of the rectifying device 520 is connected with the input end of the input filter sub-circuit 530, the second output end of the rectifying device 520 is grounded through the input filter sub-circuit 530, and the output ends of the input filter sub-circuit 530 are respectively connected with the LED load group and the constant current driving circuit 200.
The overcurrent protection subcircuit 510 includes a first fuse FR1, a second fuse FR2, and a thermistor VR1. One end of the first fuse FR1 is used for being connected with a live wire, the other end of the first fuse FR1 is connected with a first input end of the rectifying device 520, one end of the second fuse FR2 is used for being connected with a zero line, the other end of the second fuse FR2 is connected with a second input end of the rectifying device 520, one end of the thermistor VR1 is connected with the first input end of the rectifying device 520, and the other end of the thermistor VR1 is connected with the second input end of the rectifying device 520.
The input filter sub-circuit 530 includes a first inductor L1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fifth resistor R5, and a first diode D1. One end of the first inductor L1 is connected to the first output end of the rectifying device 520 and one end of the first capacitor C1, the other end of the first inductor L1 is connected to one end of the second capacitor C2 and one end of the third capacitor C3, respectively, and outputs high-voltage direct current, the other end of the first capacitor C1 and the other end of the second capacitor C2 are grounded, the other end of the third capacitor C3 is grounded through the fifth resistor R5, the anode of the first diode D1 is grounded, and the cathode of the first diode D1 is connected to the second output end of the rectifying device 520.
The overcurrent protection sub-circuit 510 is used for accessing external ac and providing overcurrent and overvoltage protection for the following circuit structure, the rectifying device 520 rectifies the ac output from the overcurrent protection sub-circuit 510, converts the ac into high-voltage dc, and the input filter sub-circuit 530 performs further filtering processing on the dc voltage output from the rectifying device 520 to eliminate ac interference in the dc voltage.
According to a second aspect of the present utility model, an LED lamp is provided, where the LED lamp includes the above LED driving circuit, and the specific structure of the LED driving circuit refers to the above embodiment, and since the LED lamp of the present utility model adopts all the technical solutions of all the embodiments, at least the LED lamp has all the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein.
In summary, the LED driving circuit and the LED lamp provided by the utility model obtain the color temperature adjusting signal representing the real-time solar color temperature parameter from the outside, and then the dimming circuit adjusts the load current of the LED loads of the three color lights according to the color temperature adjusting signal, so that the LED loads of the three different color temperatures are respectively in different light emitting states, the color temperature of the mixed light obtained by mixing the three color lights is similar to the real-time solar color temperature parameter, and the effect of adjusting the color temperature of the LED loads according to the illumination color temperature of the external environment is achieved.
The embodiments described in the embodiments of the present utility model are for more clearly describing the technical solutions of the embodiments of the present utility model, and do not constitute a limitation on the technical solutions provided by the embodiments of the present utility model, and those skilled in the art can know that, with the evolution of technology and the appearance of new application scenarios, the technical solutions provided by the embodiments of the present utility model are equally applicable to similar technical problems.
It will be appreciated by persons skilled in the art that the embodiments of the utility model are not limited by the illustrations, and that more or fewer steps than those shown may be included, or certain steps may be combined, or different steps may be included.
The apparatus embodiments described above are merely illustrative, in that the circuitry illustrated as separate components may or may not be physically separate, i.e., may be located in one place, or may be distributed over multiple network circuits. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
Those of ordinary skill in the art will appreciate that all or some of the steps of the methods, systems, functional modules/circuits in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof.
The terms "first," "second," "third," "fourth," and the like in the description of the utility model and in the above figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or circuits is not necessarily limited to those steps or circuits that are expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that in the present utility model, "at least one (item)" means one or more, and "a plurality" means two or more. "and/or" for describing the association relationship of the association object, the representation may have three relationships, for example, "a and/or B" may represent: only a, only B and both a and B are present, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
In the several embodiments provided by the present utility model, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the above-described circuit division is merely a logical function division, and there may be other division manners in which a plurality of circuits or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or circuits, which may be in electrical, mechanical or other form.
The circuits described above as separate components may or may not be physically separate, and components shown as circuits may or may not be physical circuits, i.e., may be located in one place, or may be distributed over multiple network circuits. Some or all of the circuits may be selected according to actual needs to achieve the purpose of the embodiment.
In addition, each functional circuit in each embodiment of the present utility model may be integrated in one processing circuit, or each circuit may exist alone physically, or two or more circuits may be integrated in one circuit. The integrated circuit may be implemented in hardware or in software functional circuits.
The preferred embodiments of the present utility model have been described above with reference to the accompanying drawings, and are not thereby limiting the scope of the claims of the embodiments of the present utility model. Any modifications, equivalent substitutions and improvements made by those skilled in the art without departing from the scope and spirit of the embodiments of the present utility model shall fall within the scope of the claims of the embodiments of the present utility model.
Claims (10)
1. An LED driving circuit is characterized by comprising an LED load group, a constant current driving circuit (200), a communication circuit (300) and a dimming circuit (400);
the LED load group is connected with high-voltage direct current and comprises a first color temperature load (110), a second color temperature load (120) and a third color temperature load (130) which are connected in parallel;
the constant current driving circuit (200) is connected with the LED load group, is connected with high-voltage direct current and drives the LED load group connected with the high-voltage direct current;
the communication circuit (300) is connected with the dimming circuit (400), receives a color temperature adjusting signal sent from the outside and sends the color temperature adjusting signal to the dimming circuit (400), and the color temperature adjusting signal represents real-time sunlight color temperature parameters;
the dimming circuit (400) is connected with the constant current driving circuit (200), receives a color temperature adjusting signal, and respectively controls load currents flowing through the first color temperature load (110), the second color temperature load (120) and the third color temperature load (130) according to the color temperature adjusting signal so as to adjust the color mixing color temperature of the LED load group.
2. The LED driving circuit according to claim 1, wherein the constant current driving circuit (200) includes a power supply chip (240), a first switching device (210), a second switching device (220), and a third switching device (230);
the power chip (240) has a first output port, a second output port, and a third output port;
the first color temperature load (110), the first switching device (210) and the first output port are sequentially connected, the second color temperature load (120), the second switching device (220) and the second output port are sequentially connected, and the third color temperature load (130), the third switching device (230) and the third output port are sequentially connected;
the dimming circuit (400) is respectively connected with the first switching device (210), the second switching device (220) and the third switching device (230), and the dimming circuit (400) respectively controls the opening degree of the first switching device (210), the second switching device (220) and the third switching device (230) according to the color temperature adjusting signal.
3. The LED driving circuit according to claim 2, wherein the constant current driving circuit (200) further comprises a current setting sub-circuit (270), a voltage dividing sub-circuit (250), and a voltage setting sub-circuit (260);
the power chip (240) has a current setting port, a power input port and an overvoltage detection port;
the current setting port is connected with one end of a current setting sub-circuit (270), and the other end of the current setting sub-circuit (270) is grounded; the power input port is connected with one end of the voltage divider circuit (250), and the other end of the voltage divider circuit (250) is connected with high-voltage direct current; the first end of the voltage setting sub-circuit (260) is connected with high-voltage direct current, the second end of the voltage setting sub-circuit (260) is grounded, and the overvoltage detection port is connected with the third end of the voltage setting sub-circuit (260).
4. A LED driving circuit according to claim 2 or 3, characterized in that the first switching device (210), the second switching device (220) and the third switching device (230) are transistors or MOS transistors.
5. The LED driving circuit according to claim 1, wherein the dimming circuit (400) comprises three dimming sub-circuits (410);
the first dimming sub-circuit (410) receives a first color temperature adjusting signal and outputs a first control signal according to the first color temperature adjusting signal, and the first control signal adjusts the brightness of a first color temperature load (110) according to the duty ratio of the first control signal;
the second dimming sub-circuit (410) receives a second color temperature adjusting signal and outputs a second control signal according to the second color temperature adjusting signal, wherein the second control signal adjusts the brightness of a second color temperature load (120) according to the self duty cycle;
the third dimming sub-circuit (410) receives a third temperature adjustment signal and outputs a third control signal according to the third temperature adjustment signal, wherein the third control signal adjusts the brightness of a third temperature load (130) according to the duty cycle of the third control signal.
6. The LED driving circuit according to claim 5, wherein the dimming sub-circuit (410) comprises a dimming chip (411) and an optocoupler device (412);
the dimming chip (411) is provided with a starting port, a dimming input port, a dimming output port and a power supply port;
the starting port is connected with high-voltage direct current;
the dimming input port is connected with the communication circuit (300) and receives a first color temperature adjusting signal, a second color temperature adjusting signal or a third color temperature adjusting signal;
the power supply port is connected with the anode of the diode of the optocoupler device (412), the dimming output port is connected with the cathode of the diode of the optocoupler device (412), the triode of the optocoupler device (412) is connected with the constant current driving circuit (200), and the dimming chip (411) outputs a first control signal, a second control signal or a third control signal through the optocoupler device (412).
7. The LED driving circuit according to claim 1, wherein the communication circuit (300) is a wired communication module or a wireless communication module.
8. The LED driving circuit according to claim 1, further comprising an input rectifying circuit (500);
the input rectifying circuit (500) is connected with external alternating current, and converts the external alternating current into high-voltage direct current suitable for the LED driving circuit to output.
9. The LED driving circuit according to claim 8, wherein the input rectifying circuit (500) comprises an overcurrent protection sub-circuit (510), a rectifying device (520) and an input filtering sub-circuit (530);
the first input end of the overcurrent protection subcircuit (510) is used for being connected with a live wire, the second input end of the overcurrent protection subcircuit (510) is used for being connected with a zero line, the first output end of the overcurrent protection subcircuit (510) is connected with the first input end of the rectifying device (520), the second output end of the overcurrent protection subcircuit (510) is connected with the second input end of the rectifying device (520), the first output end of the rectifying device (520) is connected with the input end of the input filter subcircuit (530), the second output end of the rectifying device (520) is grounded through the input filter subcircuit (530), and the output ends of the input filter subcircuit (530) are respectively connected with the LED load group and the constant current driving circuit (200).
10. An LED lamp comprising the LED driving circuit of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223123359.7U CN219577304U (en) | 2022-11-23 | 2022-11-23 | LED drive circuit and LED lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223123359.7U CN219577304U (en) | 2022-11-23 | 2022-11-23 | LED drive circuit and LED lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219577304U true CN219577304U (en) | 2023-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223123359.7U Active CN219577304U (en) | 2022-11-23 | 2022-11-23 | LED drive circuit and LED lamp |
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| Country | Link |
|---|---|
| CN (1) | CN219577304U (en) |
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- 2022-11-23 CN CN202223123359.7U patent/CN219577304U/en active Active
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