CN112702812B - LED driving method and driving circuit - Google Patents
LED driving method and driving circuit Download PDFInfo
- Publication number
- CN112702812B CN112702812B CN202110058694.4A CN202110058694A CN112702812B CN 112702812 B CN112702812 B CN 112702812B CN 202110058694 A CN202110058694 A CN 202110058694A CN 112702812 B CN112702812 B CN 112702812B
- Authority
- CN
- China
- Prior art keywords
- npn triode
- led
- triode
- output end
- light
- 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.)
- Active
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]
- H05B45/20—Controlling the colour of the light
-
- 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
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The application relates to the field of LED lamp control, in particular to an LED lamp flashing drive control method and a drive circuit, and the LED lamp flashing drive control method comprises a power supply module, a central processing module and an LED light emitting module, wherein the power supply module is used for supplying power to the central processing module, the central processing module is used for controlling the on-off or on-state mode of an LED, and the LED light emitting module is a light emitting device for executing the central processing module and can generate various kinds of bulb flashing and different colors of light.
Description
Technical Field
The present disclosure relates to the field of LED lamp control, and in particular, to an LED driving method and a driving circuit.
Background
Light Emitting Diodes (LEDs) are used as indicator lights in circuits and instruments, or constitute characters, numbers, and screen displays, and can also be directly used as illumination light sources. The light emitting diode can synthesize colored light according to the proportional mixing of the three primary colors of light, namely red, green and blue, so as to realize the application of the colored light. The light emitting diode is used as a novel light source, has the characteristics of energy conservation, environmental protection and high efficiency, and the technology is mature and widely applied to various fields.
The LED driving circuit is an important component of the LED lamp, and converts electric energy acquired from the outside into stable direct current to provide power for the LED lamp bead connected with the LED driving circuit.
In view of the above-mentioned related technologies, the inventor believes that there is an LED driving circuit that can generally only provide a single driving state for an LED lamp bead, that is, even if the LED driving circuit is connected to a plurality of LED lamp bead groups with different light colors, the LED driving circuit can only provide a single operating mode, the light color tone of the LED lamp is fixed, and it is difficult for a user to adjust the light color tone of the LED lamp according to the user's own needs.
Disclosure of Invention
In order to facilitate control over the working mode of the LED lamp, the application provides an LED driving method and a driving circuit.
In a first aspect, the present application provides an LED lamp flashing driving control circuit, which adopts the following technical scheme:
an LED lamp flash drive control circuit, comprising:
the power supply module is used for supplying power to the central processing module and comprises a first power supply port N for outputting forward current and a second power supply port L for outputting reverse current; the first power supply port N and the second power supply port L are both connected with the rectification circuit BR1 and output from the output end of the rectification circuit BR 1;
the device comprises a central processing module and a control module, wherein the central processing module comprises a program control chip U1 and a control circuit, and the program control chip U1 comprises a power supply terminal VDD, a grounding terminal GND, a mode selection terminal K0 and a first signal output terminal A1; the power supply end VDD is connected with the output end of the rectifying circuit BR1, and the mode selection end K0 is connected to the ground wire through a switch button K1;
the control circuit comprises a first control unit, and the first control unit comprises a first NPN triode Q1, a third NPN triode Q3 and a sixth PNP triode Q6; the base electrode of the first NPN triode Q1 is connected with a first signal output end A1, the emitting electrode of the first NPN triode Q1 is connected with the base electrode of a third NPN triode Q3, and the emitting electrode of the third NPN triode Q3 is connected with the ground wire; a collector of the first NPN triode Q1 is connected to a base of a sixth PNP triode Q6, an emitter of the sixth PNP triode Q6 is connected to an output end of the rectifier circuit BR1, a collector of the sixth NPN triode Q6 is provided with a reverse connection point LED-, and a collector of the third NPN triode Q3 is provided with a positive connection point LED +;
an LED light module comprising a first LED group and a second LED group; the first LED group and the first LED group are connected in series in the forward direction to form a forward connection point LED + and a reverse connection point LED-, the forward connection point LED + of the LED light-emitting module is connected with the forward connection point LED + of the control circuit, and the reverse connection point LED-of the LED light-emitting module is connected with the reverse connection point LED-of the control circuit.
By adopting the technical scheme, the power supply module is used for supplying power to the central processing module, and the first power supply port N and the second power supply port L are both connected with the rectification circuit BR1, so that electric energy of the positive half cycle of alternating current and electric energy of the negative half cycle of alternating current can be output through the rectification circuit BR1, and the full utilization of the alternating current energy is realized; the program control chip in the central processing module can realize the conduction state of the control circuit according to the internal preset control program or the switching of the switch button K1, thereby controlling the light emitting state of the LED light emitting module.
Optionally, the program control chip U1 further includes a second signal output terminal B1, the control circuit further includes a second control unit, and the second control unit includes a second NPN triode Q2, a fourth NPN triode Q4, and a fifth PNP triode Q5; the base electrode of the second NPN triode Q2 is connected with a second signal output end B1, the emitting electrode of the second NPN triode Q2 is connected with the base electrode of a fourth NPN triode Q4, and the emitting electrode of the fourth NPN triode Q4 is connected with the ground wire; the collector of the second NPN triode Q2 is connected with the base of a fifth PNP triode Q5, the emitter of the fifth PNP triode Q5 is connected with the output end of the rectifying circuit BR1, the collector of the fifth PNP triode Q5 is connected with a positive connection point LED +, and the collector of the fourth NPN triode Q4 is connected with a negative connection point LED-.
By adopting the technical scheme, the first control unit and the second control unit are connected to form a push-pull circuit, so that the two control circuits are integrated into two symmetrical conducting circuits for controlling the light emitting state of the LED light emitting module and increasing the types of light control signals.
Optionally, a first resistor R1 is connected between the base of the first NPN triode Q1 and the first signal output end A1, and a fifth resistor R5 is connected between the base of the second NPN triode Q2 and the second signal output end B1; and/or a third resistor R3 is connected between the emitter of the first NPN triode Q1 and the base of the third NPN triode Q3, and a seventh resistor R7 is connected between the emitter of the second NPN triode Q2 and the base of the fourth NPN triode Q4.
By adopting the technical scheme, the resistor connected in series to the base electrode of the triode can block current, so that the effect of reducing the current is achieved, the base electrode current of the triode works within an allowable range, and the working reliability of the triode and a circuit is ensured.
Optionally, a second resistor R2 is connected between the base of the first NPN triode Q1 and the ground, and a sixth resistor R6 is connected between the base of the second NPN triode Q2 and the ground; a fourth resistor R4 is connected between the base of the third NPN triode Q3 and the ground wire, and an eighth resistor R8 is connected between the base of the fourth NPN triode Q4 and the ground wire; a ninth resistor R9 is connected between the base and the emitter of the fifth PNP triode Q5, and a tenth resistor R10 is connected between the base and the emitter of the sixth PNP triode Q6.
By adopting the technical scheme, the resistor connected in parallel between the base electrode and the emitter electrode of the triode enables the internal resistance between the base electrode and the emitter electrode to form resistor voltage division, a static working point of the base electrode of the triode is provided, and the energy of the electrode is consumed on the resistor connected in parallel when the power is off, so that the reliable turn-off of the triode is ensured.
Optionally, the power supply module further includes a rectifier circuit BR1, where the rectifier circuit BR1 includes a first rectifier diode D1, a second rectifier diode D2, a third rectifier diode D3, and a fourth rectifier diode D4;
the anode of the first rectifier diode D1 is connected with the cathode of the fourth rectifier diode D4, and the cathode of the first rectifier diode D1 is connected with the cathode of the second rectifier diode D2; the anode of the third rectifier diode D3 is connected with the anode of the fourth rectifier diode D4, and the cathode of the third rectifier diode D3 is connected with the anode of the second rectifier diode D2;
the first power supply port N is connected with the first rectifier diode D1, and the second power supply port L is connected with the anode of the second rectifier diode D2.
By adopting the technical scheme, the first rectifier diode D1, the second rectifier diode D2, the third rectifier diode D3 and the fourth rectifier diode D4 are connected to form a bridge rectifier circuit, so that the electric energy of alternating current can be fully utilized.
Optionally, the rectifier circuit BR1 further includes a first capacitor C1, one end of the first capacitor C1 is connected to a cathode of the first rectifier diode D1, the other end of the first capacitor C1 is connected to an anode of the third rectifier diode D3, and an anode of the third rectifier diode D3 is grounded.
By adopting the technical scheme, the first capacitor C1 plays a role in mainly compensating reactive power of inductive load of a power system so as to improve power factor, improve voltage quality and reduce line loss.
Optionally, the central processing module includes a voltage stabilizing filter circuit, and the voltage stabilizing filter circuit includes a first voltage stabilizing diode D1, a thirteenth resistor R13, and a second capacitor C2; the anode of the first voltage-stabilizing diode D1 is grounded, the cathode of the first voltage-stabilizing diode D1 is connected with the power supply end VDD, and the thirteenth resistor R13 is connected between the output end of the rectifying circuit BR1 and the power supply end VDD; one end of the second capacitor C2 is connected to the power supply terminal VDD, and the other end is connected to the ground terminal GND.
By adopting the technical scheme, the thirteenth resistor R13 plays a role in providing voltage drop and reducing current, and is matched with the first voltage stabilizing diode D1, so that the first voltage stabilizing diode D1 keeps relatively stable voltage in a relatively large current range after reverse breakdown, and the LED light-emitting module is stable in light emission; the second capacitor C2 is a filter capacitor, noise waves and alternating current components of the power supply module filtered by the filter capacitor are flattened by the filter capacitor, and the smooth pulsation direct current is stored.
Optionally, the first light emitting diode group and/or the second light emitting diode group are/is an electrodeless two-color LED lamp.
By adopting the technical scheme, one lamp bead of the electrodeless double-color LED contains two colors of lamp beads, one color of the lamp beads emits light when the forward current is conducted, and the other color of the lamp beads emits light when the reverse current is conducted, so that the functions of flash, gradual lightening and dimming, full brightness, gradual color change and the like can be realized. Wherein, the flash-to-flash means that when one color is luminous, the other color is extinguished, and the cycle is continuous, so as to realize the flash effect.
In a second aspect, the LED lamp flash driving control method provided by the present application adopts the following technical scheme:
an LED lamp flash drive control method comprises the LED lamp flash drive control circuit; further comprising:
generating a light control signal, wherein the light control signal is output to a control circuit from a first signal output end A1 and a second signal output end B1 of a program control chip so as to control the light emitting state of the LED light emitting module;
the light control signal comprises at least one of a first color bubble flashing mode, a second color bubble flashing mode, a first color constant brightness mode and a second color constant brightness mode.
By adopting the technical scheme, the light control signal is output to the control circuit from the first signal output end A1 and the second signal output end B1, and the control circuit realizes the on-off state according to the light control signal, so that the light emitting state of the LED light emitting module is regulated and controlled.
Optionally, the method further includes: and generating a time control signal, wherein the time control signal is used for the duration of the light control signal and the sequence of the light control signal.
By adopting the technical scheme, the time control signal can integrate various light control signals, and the effect of automatically switching the light emitting state of the LED light emitting module is realized.
In summary, the present application includes at least one of the following beneficial technical effects:
the LED lamp has the advantages that 1, the LED light-emitting module can be in various light-emitting states and can be switched according to light control signals, the light color tone of the LED lamp can be various, and a user can adjust the color tone of the LED lamp according to the need of the user;
2. through the design of the push-pull circuit, the alternate conduction of the control circuit can be realized, and the execution of various lamplight control signals can be realized.
Drawings
Fig. 1 is a schematic block diagram of an LED flash driving control circuit according to an embodiment of the present disclosure.
Fig. 2 is a circuit diagram of an LED lighting driving control circuit according to an embodiment of the present application.
Fig. 3 is a flowchart of a method for controlling flash driving of an LED lamp according to an embodiment of the present application.
Description of reference numerals:
1. a power supply module;
2. a central processing module;
3. an LED light emitting module.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
The embodiment of the application discloses LED lamp drives control circuit that dodges.
Referring to fig. 1 and 2, an LED lamp flashing driving control circuit includes a power supply module, a central processing module and an LED light emitting module, where the power supply module is configured to supply power to the central processing module, and the central processing module is configured to control a conduction state and a light emitting state of the LED light emitting module. The power supply module, the central processing module and the LED light emitting module are described in detail below.
The power supply module comprises a power supply circuit and a rectification circuit BR1, wherein the power supply circuit comprises a first power supply port N and a second power supply port L which are connected with alternating current, the first power supply port N is defined to be used for outputting forward current, and the second power supply port L is used for outputting reverse current; the first power supply port N and the second power supply port L are both connected to the rectifier circuit BR1, and a forward current and a reverse current are both output from an output end of the rectifier circuit BR 1.
Specifically, the rectifier circuit BR1 includes a first rectifier diode D1, a second rectifier diode D2, a third rectifier diode D3, a fourth rectifier diode D4, and a first capacitor C1; the negative electrode of the first rectifier diode D1 is connected with the negative electrode of the second rectifier diode D2, and the output end of the rectifier circuit BR1 is arranged between the negative electrode of the first rectifier diode D1 and the negative electrode of the second rectifier diode D2; the anode of the first rectifier diode D1 is connected with the cathode of the fourth rectifier diode D4, the anode of the third rectifier diode D3 is connected with the anode of the fourth rectifier diode D4, and the cathode of the third rectifier diode D3 is connected with the anode of the second rectifier diode D2; the first power supply port N is connected to the first rectifying diode D1, and the second power supply port L is connected to the anode of the second rectifying diode D2.
By the arrangement, forward current flows from the first power supply port N to the first rectifier diode D1 by utilizing the unidirectional conduction function of the diode, and then positive half-cycle current is output from the output end of the rectifier circuit BR 1; then, a reverse current flows from the second power supply port L to the second rectifier diode D2, and a negative half cycle current is output from the output end of the rectifier circuit BR 1; therefore, full-wave rectification of the rectification circuit BR1 is realized, and the reverse current can also lead the current output to the output end of the rectification circuit BR1 in the negative half cycle.
Further, one end of the first capacitor C1 is connected to a cathode of the first rectifying diode D1, the other end of the first capacitor C1 is connected to an anode of the third rectifying diode D3, and an anode of the third rectifying diode D3 is grounded. By the arrangement, the first capacitor C1 filters the pulsating direct current to obtain smooth direct-current high-voltage current.
The central processing module comprises a program control chip U1, a voltage stabilizing filter circuit and a control circuit, wherein the program control chip U1 comprises a power supply terminal VDD, a grounding terminal GND, a mode selection terminal K0, a first signal output terminal A1 and a second signal output terminal B1, and the rest pins are suspended. The power supply terminal VDD is connected with the output end of the rectifying circuit BR1, and the mode selection terminal K0 is connected to the ground wire through the switch button K1. The model of the program control chip U1 may be JB51552V4 or other IC chips that can implement programming.
The control program is preset in the program control chip U1 and comprises various light control signals, the light control signals realize the light emitting state of the LED light emitting module by controlling the levels of the first signal output end A1 and the second signal output end B1, and the light control signals are switched through the switch button K1.
The voltage stabilizing filter circuit comprises a first voltage stabilizing diode D1, a thirteenth resistor R13 and a second capacitor C2; the anode of the first voltage-stabilizing diode D1 is grounded, the cathode of the first voltage-stabilizing diode D1 is connected with the power supply end VDD, and the thirteenth resistor R13 is connected between the output end of the rectifying circuit BR1 and the power supply end VDD to provide voltage drop; one end of the second capacitor C2 is connected to the power supply terminal VDD, and the other end is connected to the ground terminal GND. By the arrangement, the voltage stabilizing filter circuit can eliminate pulse interference or peak generated by the rectified direct-current voltage, so that the voltage or current curve of the direct current is smoother.
The control circuit comprises a first control unit and a second control unit, wherein the first control unit and the second control unit are symmetrical to each other to form a push-pull circuit.
Specifically, the first control unit includes a first NPN transistor Q1, a third NPN transistor Q3, and a sixth PNP transistor Q6. The first signal output end A1 is connected with the base electrode of a first NPN triode Q1 through a first resistor R1, the emitting electrode of the first NPN triode Q1 is connected with the base electrode of a third NPN triode Q3 through a third resistor R3, and the emitting electrode of the third NPN triode Q3 is connected with the ground wire; a collector of the first NPN triode Q1 is connected to a base of the sixth PNP triode Q6, an emitter of the sixth PNP triode Q6 is connected to an output end of the rectifier circuit BR1, a collector of the sixth PNP triode Q6 is provided with a reverse connection point LED-, and a collector of the third NPN triode Q3 is provided with a forward connection point LED +; a second resistor R2 is connected between the base of the first NPN triode Q1 and the ground, a third resistor R3 is connected between the emitter of the first NPN triode Q1 and the base of the third NPN triode Q3, a fourth resistor R4 is connected between the base of the third NPN triode Q3 and the ground, and a tenth resistor R10 is connected between the base and the emitter of the sixth NPN triode Q6.
Similarly, the second control unit includes a second NPN transistor Q2, a fourth NPN transistor Q4, and a fifth PNP transistor Q5; the second signal output end B1 is connected with the base electrode of a second NPN triode Q2 through a fifth resistor R5, the emitter electrode of the second NPN triode Q2 is connected with the base electrode of a fourth NPN triode Q4 through a seventh resistor R7, and the emitter electrode of the fourth NPN triode Q4 is connected with the ground wire; the collector of the second NPN triode Q2 is connected to the base of the fifth PNP triode Q5, the emitter of the fifth PNP triode Q5 is connected to the output of the rectifier circuit BR1, the collector of the fifth PNP triode Q5 is connected to the positive connection point LED +, and the collector of the fourth NPN triode Q4 is connected to the negative connection point LED-. A sixth resistor R6 is connected between the base electrode and the ground wire of the second NPN triode Q2; an eighth resistor R8 is connected between the base of the fourth NPN triode Q4 and the ground wire; a ninth resistor R9 is connected between the base and the emitter of the fifth PNP triode Q5.
The LED light emitting module includes a first LED group and a second LED group; the first light-emitting diode group or the second light-emitting diode group comprises one or at least two LED lamp beads, when the number of the LED lamp beads is two or more than two, the anode of each LED lamp bead is connected with the cathode of the next LED lamp bead, and therefore the LED lamp can be conducted in the forward direction to emit light when the direct current flows through the LED lamp. The anode of the first light-emitting diode group is connected with the cathode of the second light-emitting diode group to form a positive connection point LED-; the anode of the second light emitting diode group is connected with the cathode of the first light emitting diode to form a reverse connection point LED +. When the first light emitting diode group and the first light emitting diode group are connected in series in the forward direction, the forward connection point LED + of the LED light emitting module is connected with the forward connection point LED + of the control circuit, and the reverse connection point LED-of the LED light emitting module is connected with the reverse connection point LED-of the control circuit.
Further, the first light emitting diode group and the second light emitting diode group may be general one-way conductive light emitting diodes, or may be electrodeless bicolor LED lamps. When the electrodeless double-color LED lamp is selected, the lamp beads with two colors are arranged in one lamp bead, one color is displayed when the lamp beads with the two colors are conducted with forward current, and the other color is displayed when the lamp beads with the two colors are conducted with reverse current. Therefore, the connection mode of the anode and the cathode between the first light emitting diode group and the second light emitting diode group can be selected according to the actual situation requirement, so that the LED light emitting module can emit light with different colors, and multiple lighting effects are realized.
The implementation principle of the LED lamp flashing drive control circuit in the embodiment of the application is as follows: the alternating current passes through the power supply module and then is subjected to full-wave rectification and voltage stabilization to form direct current; the direct current regulates and controls the high and low levels of the first signal output end A1 and the second signal output end B1 under the control of a program control module of the central processing module, and when the first NPN triode Q1, the third NPN triode Q3 and the sixth PNP triode Q6 are conducted, the second NPN triode Q2, the fourth NPN triode Q4 and the fifth PNP triode Q5 are cut off; on the contrary, when the second NPN triode Q2, the fourth NPN triode Q4, and the fifth PNP triode Q5 are turned on, the first NPN triode Q1, the third NPN triode Q3, and the sixth PNP triode Q6 are turned off, thereby controlling the light emitting state of the LED light emitting module.
The embodiment of the application further discloses a method for controlling the LED lamp flash drive.
Referring to fig. 2 and 3, an LED flash driving control method is applied to an LED flash driving control circuit, which generates a light control signal and a time control signal.
The light control signal is input into a first signal output end A1 and a second signal output end B1 from a program control chip U1 so as to control the light emitting state of the LED light emitting module; specifically, the light control signal may include a first color bubble flashing mode, a second color bubble flashing mode, a first color normally-on mode, and a second color normally-on mode.
When the switch button K1 is pressed, the mode is switched to the first color bubble flash mode, at this time, the first signal output end A1 outputs 90% high-level PWM, the second signal output end B1 outputs low level, at this time, the first NPN triode Q1, the third NPN triode Q3, and the sixth PNP triode Q6 are turned on, and the second NPN triode Q2, the fourth NPN triode Q4, and the fifth PNP triode Q5 are turned off. At this time, the high-voltage current flows to the reverse connection point LED + through the sixth PNP triode Q6, and then flows to the forward connection point LED + through the LED light-emitting module, so that the flickering light-emitting state of one color of the LED lamp is realized.
When the switch button K1 is pressed again, the mode is switched to the second color bubble flash mode, at this time, the first signal output end A1 outputs a low level, the second signal output end B1 outputs 90% high level PWM, at this time, the second NPN triode Q2, the fourth NPN triode Q4, and the fifth PNP triode Q5 are turned on, and the first NPN triode Q1, the third NPN triode Q3, and the sixth PNP triode Q6 are turned off. At this time, the high-voltage current flows to the positive connection point LED + through the fifth PNP triode Q5, and then flows to the reverse connection point LED-through the LED light-emitting module, so that the flickering light-emitting state of another color of the LED lamp is realized.
When the third switch button K1 is pressed, the mode is switched to the first color normally bright mode. At this time, the first signal output terminal A1 outputs a high level, the second signal output terminal B1 outputs a low level, the first NPN triode Q1, the third NPN triode Q3, and the sixth PNP triode Q6 are turned on, and the second NPN triode Q2, the fourth NPN triode Q4, and the fifth PNP triode Q5 are turned off. At this time, the high-voltage current flows through the sixth PNP triode Q6 to flow to the reverse connection point LED-, and then flows to the positive connection point LED + through the LED light-emitting module, so that the normally bright light-emitting state of one color of the LED lamp is realized.
When the fourth switch button K1 is pressed, the mode is switched to the second color normally-on mode. At this time, the first signal output terminal A1 outputs a low level, the second signal output terminal B1 outputs a high level, the first NPN triode Q1, the third NPN triode Q3, and the sixth PNP triode Q6 are turned off, and the second NPN triode Q2, the fourth NPN triode Q4, and the fifth PNP triode Q5 are turned on. At this time, the high-voltage current flows to the positive connection point LED + through the fifth PNP triode Q5, and then flows to the reverse connection point LED-through the LED light-emitting module, so that the normally-on light-emitting state of the other color of the LED lamp is realized.
The switch button is pressed in a reciprocating way, the light control signal is switched along with the switch button, and the change of the light emitting states of the LED light emitting modules is realized.
The time control signal can control the duration of the light control signal and the sequence of the light control signal. Specifically, at least two kinds of light control signals are combined to form a combined light control signal, when the switch button K1 is pressed, the combined light control signal outputs any one of high level, low level and 90% high level PWM to the first signal output terminal A1, and the second signal output terminal B1 outputs any one of high level, low level and 90% high level PWM, so that the alternate change of the light emitting state of the LED light emitting module is realized.
The 90% high level PWM can also be high level PWM such as 10% -50%, 50% -90% and the like.
The implementation principle of the LED lamp flash drive control method in the embodiment of the application is as follows: the central processing chip is internally preset with a control program, the control program comprises various light control signals, the light control signals realize the light emitting state of the LED light emitting module by controlling the levels of the first signal output end A1 and the second signal output end B1, and the light control signals are switched by the switch button K1 to realize the change of the light emitting state of the various LED light emitting modules.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A method for driving and controlling an LED lamp flash is characterized by comprising the following steps: the LED lamp flash drive control circuit comprises an LED lamp flash drive control circuit; LED lamp dodges drive control circuit includes:
the power supply module (1) is used for supplying power to the central processing module (2), and the power supply module (1) comprises a first power supply port N for outputting forward current and a second power supply port L for outputting reverse current; the first power supply port N and the second power supply port L are both connected with the rectification circuit BR1 and output from the output end of the rectification circuit BR 1;
the central processing module (2) comprises a program control chip U1 and a control circuit, wherein the program control chip U1 comprises a power supply end VDD, a grounding end GND, a mode selection end K0 and a first signal output end A1; the power supply end VDD is connected with the output end of the rectifying circuit BR1, and the mode selection end K0 is connected to the ground wire through a switch button K1;
the control circuit comprises a first control unit, and the first control unit comprises a first NPN triode Q1, a third NPN triode Q3 and a sixth PNP triode Q6; the base electrode of the first NPN triode Q1 is connected with a first signal output end A1, the emitting electrode of the first NPN triode Q1 is connected with the base electrode of a third NPN triode Q3, and the emitting electrode of the third NPN triode Q3 is connected with the ground wire; a collector of the first NPN triode Q1 is connected with a base of a sixth PNP triode Q6, an emitter of the sixth PNP triode Q6 is connected with an output end of the rectifying circuit BR1, a collector of the sixth PNP triode Q6 is provided with a reverse connection point LED-, and a collector of the third NPN triode Q3 is provided with a positive connection point LED +;
an LED light module (3), the LED light module (3) comprising a first LED group and a second LED group; when the first light emitting diode group and the second light emitting diode group are connected in series in the forward direction, a forward connection point LED + and a reverse connection point LED-are formed, the forward connection point LED + of the LED light emitting module (3) is connected with the forward connection point LED + of the control circuit, and the reverse connection point LED-of the LED light emitting module (3) is connected with the reverse connection point LED-of the control circuit; the program control chip U1 further comprises a second signal output terminal B1, the control circuit further comprises a second control unit, and the second control unit comprises a second NPN triode Q2, a fourth NPN triode Q4, and a fifth PNP triode Q5; the base electrode of the second NPN triode Q2 is connected with a second signal output end B1, the emitting electrode of the second NPN triode Q2 is connected with the base electrode of a fourth NPN triode Q4, and the emitting electrode of the fourth NPN triode Q4 is connected with the ground wire; a collector electrode of the second NPN triode Q2 is connected with a base electrode of a fifth PNP triode Q5, an emitter electrode of the fifth PNP triode Q5 is connected with an output end of the rectifying circuit BR1, a collector electrode of the fifth PNP triode Q5 is connected with a positive connection point LED +, and a collector electrode of the fourth NPN triode Q4 is connected with a negative connection point LED-;
the control method comprises the following steps:
generating a light control signal, wherein the light control signal is output to a control circuit from a first signal output end A1 and a second signal output end B1 of a program control chip so as to control the light emitting state of an LED light emitting module (3);
the light control signal comprises at least one of a first color bubble flashing mode, a second color bubble flashing mode, a first color constant-brightness mode and a second color constant-brightness mode;
when the switch button K1 is pressed, the mode is switched to a first color bubble flash mode, at the moment, the first signal output end A1 outputs 90% high-level PWM, the second signal output end B1 outputs low level, at the moment, the first NPN triode Q1, the third NPN triode Q3 and the sixth PNP triode Q6 are conducted, and the second NPN triode Q2, the fourth NPN triode Q4 and the fifth PNP triode Q5 are cut off; at the moment, the high-voltage current flows to the reverse connection point LED + through the sixth PNP triode Q6 and then flows to the positive connection point LED + through the LED light-emitting module, and the flickering light-emitting state of one color of the LED lamp is realized;
when the switch button K1 is pressed again, the mode is switched to a second color bubble flash mode, at the moment, the first signal output end A1 outputs a low level, the second signal output end B1 outputs 90% high level PWM, at the moment, the second NPN triode Q2, the fourth NPN triode Q4 and the fifth PNP triode Q5 are switched on, and the first NPN triode Q1, the third NPN triode Q3 and the sixth PNP triode Q6 are switched off; at the moment, the high-voltage current flows to the positive connection point LED + through the fifth PNP triode Q5, and then flows to the reverse connection point LED-through the LED light-emitting module, so that the flickering light-emitting state of another color of the LED lamp is realized;
when the third-time switch button K1 is pressed, the mode is switched to the first color normally-on mode; at the moment, the first signal output end A1 outputs a high level, the second signal output end B1 outputs a low level, the first NPN triode Q1, the third NPN triode Q3 and the sixth PNP triode Q6 are conducted, and the second NPN triode Q2, the fourth NPN triode Q4 and the fifth PNP triode Q5 are cut off; at the moment, the high-voltage current flows to the reverse connection point LED + through the sixth PNP triode Q6, and then flows to the positive connection point LED + through the LED light-emitting module, so that the normally-on light-emitting state of one color of the LED lamp is realized;
when the fourth-time switch button K1 is pressed, the mode is switched to a second color normally-on mode; at the moment, the first signal output end A1 outputs a low level, the second signal output end B1 outputs a high level, the first NPN triode Q1, the third NPN triode Q3 and the sixth PNP triode Q6 are cut off, and the second NPN triode Q2, the fourth NPN triode Q4 and the fifth PNP triode Q5 are conducted; at the moment, the high-voltage current flows to the positive connection point LED + through the fifth PNP triode Q5, and then flows to the reverse connection point LED-through the LED light-emitting module, and the normally-on light-emitting state of the other color of the LED lamp is realized.
2. The LED lamp flash driving control method according to claim 1, wherein: a first resistor R1 is connected between the base of the first NPN triode Q1 and the first signal output end A1, and a fifth resistor R5 is connected between the base of the second NPN triode Q2 and the second signal output end B1; and/or a third resistor R3 is connected between the emitter of the first NPN triode Q1 and the base of the third NPN triode Q3, and a seventh resistor R7 is connected between the emitter of the second NPN triode Q2 and the base of the fourth NPN triode Q4.
3. The LED lamp flash driving control method according to claim 2, wherein: a second resistor R2 is connected between the base electrode of the first NPN triode Q1 and the ground wire, and a sixth resistor R6 is connected between the base electrode of the second NPN triode Q2 and the ground wire; a fourth resistor R4 is connected between the base of the third NPN triode Q3 and the ground wire, and an eighth resistor R8 is connected between the base of the fourth NPN triode Q4 and the ground wire; a ninth resistor R9 is connected between the base and the emitter of the fifth PNP triode Q5, and a tenth resistor R10 is connected between the base and the emitter of the sixth PNP triode Q6.
4. The LED lamp flash driving control method according to claim 1, wherein: the power supply module (1) further comprises a rectification circuit BR1, wherein the rectification circuit BR1 comprises a first rectification diode D1, a second rectification diode D2, a third rectification diode D3 and a fourth rectification diode D4;
the anode of the first rectifier diode D1 is connected with the cathode of the fourth rectifier diode D4, and the cathode of the first rectifier diode D1 is connected with the cathode of the second rectifier diode D2; the anode of the third rectifier diode D3 is connected with the anode of the fourth rectifier diode D4, and the cathode of the third rectifier diode D3 is connected with the anode of the second rectifier diode D2;
the first power supply port N is connected with the first rectifier diode D1, and the second power supply port L is connected with the anode of the second rectifier diode D2.
5. The LED lamp flash driving control method according to claim 4, wherein: the rectifier circuit BR1 further comprises a first capacitor C1, one end of the first capacitor C1 is connected with the negative electrode of the first rectifier diode D1, the other end of the first capacitor C1 is connected with the positive electrode of the third rectifier diode D3, and the positive electrode of the third rectifier diode D3 is grounded.
6. The LED lamp flash driving control method according to claim 1, wherein: the central processing module (2) comprises a voltage-stabilizing filter circuit, and the voltage-stabilizing filter circuit comprises a first voltage-stabilizing diode D1, a thirteenth resistor R13 and a second capacitor C2; the anode of the first voltage-stabilizing diode D1 is grounded, the cathode of the first voltage-stabilizing diode D1 is connected with the power supply end VDD, and the thirteenth resistor R13 is connected between the output end of the rectifying circuit BR1 and the power supply end VDD; one end of the second capacitor C2 is connected to the power supply terminal VDD, and the other end is connected to the ground terminal GND.
7. The LED lamp flash driving control method according to claim 1, wherein: the first light-emitting diode group and/or the second light-emitting diode group are/is an electrodeless double-color LED lamp.
8. The LED lamp flash driving control method according to claim 1, wherein: further comprising: and generating a time control signal, wherein the time control signal is used for the duration of the light control signal and the sequence of the light control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110058694.4A CN112702812B (en) | 2021-01-16 | 2021-01-16 | LED driving method and driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110058694.4A CN112702812B (en) | 2021-01-16 | 2021-01-16 | LED driving method and driving circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112702812A CN112702812A (en) | 2021-04-23 |
| CN112702812B true CN112702812B (en) | 2023-04-07 |
Family
ID=75515447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110058694.4A Active CN112702812B (en) | 2021-01-16 | 2021-01-16 | LED driving method and driving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112702812B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204697345U (en) * | 2015-06-02 | 2015-10-07 | 宁波公牛电器有限公司 | A kind of centralized control electronic switching circuit |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203151800U (en) * | 2013-01-05 | 2013-08-21 | 深圳市泓亚光电子有限公司 | LED luminaire and bi-color LED dimming circuit |
| CN203387735U (en) * | 2013-07-23 | 2014-01-08 | 王安 | Control circuit for LED festival lamps |
| CN203477988U (en) * | 2013-09-09 | 2014-03-12 | 台州市鸿基灯饰有限公司 | LED lamp string and LED lamp string controller |
| CN103561507A (en) * | 2013-09-30 | 2014-02-05 | 常州市巨泰电子有限公司 | LED lamp string single way band control circuit and control method |
| CN205746248U (en) * | 2016-06-17 | 2016-11-30 | 东莞市飞扬灯饰科技有限公司 | A kind of double-colored clever lamp of low-voltage LED |
| WO2019109894A1 (en) * | 2017-12-05 | 2019-06-13 | 苏州欧普照明有限公司 | Combined circuit and control circuit |
-
2021
- 2021-01-16 CN CN202110058694.4A patent/CN112702812B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204697345U (en) * | 2015-06-02 | 2015-10-07 | 宁波公牛电器有限公司 | A kind of centralized control electronic switching circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112702812A (en) | 2021-04-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5116089B2 (en) | LED light emitting method and LED lighting device | |
| CN203896552U (en) | Light-adjustable alternating current light-emitting diode device | |
| US9380661B2 (en) | Lighting source and lighting apparatus | |
| CN102917486A (en) | LED lamp adjustable in luminance and color temperature | |
| JP4156072B2 (en) | LED collective lamp for AC power supply | |
| CN204929313U (en) | Luminous controlling means of LED lamps and lanterns and system | |
| CN103929845B (en) | It is suitable for the light adjusting circuit of linear low density LED driver | |
| CN109699105B (en) | LED filament lamp circuit capable of remotely controlling light modulation | |
| CN112702812B (en) | LED driving method and driving circuit | |
| KR100481045B1 (en) | Colored light variable type many purposes lighting apparatus | |
| CN103096563A (en) | Dimming control system based on multiple paths of lighting light-emitting diodes (LEDs) | |
| JP2012074693A (en) | Driver circuit for light-emitting component | |
| KR102344128B1 (en) | Led light unit with reduced flicker phenomenon | |
| CN2543317Y (en) | Drive circuit for LED lamps and lanterns | |
| CN201426199Y (en) | Light regulating device and lighting device | |
| CN210298138U (en) | LED lamp control system | |
| CN107995751A (en) | A kind of LED drive circuit | |
| US10455673B1 (en) | Light string with a non-extinguishing function and an independent LED blinking function | |
| CN209787506U (en) | Lamp area control circuit and system | |
| CN206533583U (en) | RGB multi-color lamp string luminance compensation driving power supplies | |
| CN111163563A (en) | LED control circuit | |
| CN218679439U (en) | Integrated LED light source control module and LED lamp | |
| CN214708111U (en) | LED drive circuit and LED lamp | |
| CN212211464U (en) | LED series single control circuit | |
| CN215300965U (en) | LED lamp control circuit |
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 |