CN112996175B - Control circuit and control method for adjusting lighting parameters - Google Patents
Control circuit and control method for adjusting lighting parameters Download PDFInfo
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- CN112996175B CN112996175B CN202110514708.9A CN202110514708A CN112996175B CN 112996175 B CN112996175 B CN 112996175B CN 202110514708 A CN202110514708 A CN 202110514708A CN 112996175 B CN112996175 B CN 112996175B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
- H05B45/14—Controlling the intensity of the light using electrical feedback from LEDs or from LED modules
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- 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
- H05B45/24—Controlling the colour of the light using electrical feedback from LEDs or from LED modules
Abstract
The invention discloses a control circuit and a control method for adjusting lighting parameters, wherein the control circuit for adjusting the lighting parameters comprises the following steps: the key circuit, the main control chip and the output circuit; when the key circuit receives a key instruction, the key instruction is converted into a voltage signal, and the voltage signal is sent to the main control chip; the main control chip identifies the voltage signal, adjusts the lighting parameters of the LED lamp according to the voltage signal to obtain optimized lighting parameters, generates a control signal according to the optimized lighting parameters, and sends the control signal to the output circuit; and the output circuit controls the LED lamp to emit light according to the control signal. Because this application carries out the regulation of lighting parameter according to the button instruction, and then makes the LED lamp give out light according to the button instruction to realize that the luminous colour temperature of LED lamp and bright adjust according to the button instruction.
Description
Technical Field
The invention relates to the technical field of electrician and electronics, in particular to a control circuit and a control method for adjusting lighting parameters.
Background
With the development of the modern science and technology, more and more electronic products are successfully made out, which brings great convenience to the life of people, the electronic products become an indispensable part of the life of people, and the demand of people for the electronic products will be continuously increased, so that the electronic products will be a huge market at present or in the future. In the use of electronic products, many products perform digital display or perform other functions through the LED lamp, wherein the brightness and color temperature of the LED lamp play an important role in many aspects.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a control circuit and a control method for adjusting lighting parameters, and aims to solve the technical problem that the color temperature and the brightness of an LED lamp cannot be flexibly controlled according to user instructions in the prior art.
In order to achieve the above object, the present invention provides a control circuit for adjusting lighting parameters, wherein the control circuit for adjusting lighting parameters comprises a key circuit, a main control chip and an output circuit;
the main control chip is respectively connected with the key circuit and the output circuit;
the key circuit is used for converting the key instruction into a voltage signal and sending the voltage signal to the main control chip when the key instruction is received;
the main control chip is used for identifying the voltage signal, adjusting the lighting parameters of the LED lamp according to the voltage signal to obtain optimized lighting parameters, generating control signals according to the optimized lighting parameters, and sending the control signals to the output circuit;
and the output circuit is used for controlling the LED lamp to emit light according to the control signal.
Optionally, the control circuit for adjusting the lighting parameter further includes a memory circuit, and the memory circuit is connected to the main control chip;
the memory circuit is used for storing the optimized lighting parameters when the lighting parameter adjusting operation is not detected within the preset time;
the memory circuit is also used for sending the optimized lighting parameters to the main control chip when the power is turned on again after power failure;
the main control chip is further used for generating a lamp effect recovery signal according to the optimized lighting parameters and sending the lamp effect recovery signal to the output circuit;
and the output circuit is also used for controlling the LED lamp to emit light according to the lamp effect recovery signal.
Optionally, the key circuit includes a pull-up resistor, a first resistor, a second resistor, a first key, a second key, a third key, and a first capacitor; the output end of the key circuit is connected with a key pin of the main control chip;
a first end of the pull-up resistor is connected with an output end of the power circuit, and a second end of the pull-up resistor is connected with a first end of the first capacitor, a first end of the first key, a first end of the second key and a first end of the third key;
the first end of the first capacitor is further connected with a key pin of the main control chip, the second end of the second key is connected with the first end of the first resistor, the second end of the third key is connected with the first end of the second resistor, and the second end of the first capacitor is connected with the second end of the first key, the second end of the first resistor and the second end of the second resistor and grounded.
Optionally, the control circuit comprises: a main control chip;
the main control chip is further used for generating a control signal according to the conversion signal and sending the control signal to the adjustable constant current driving circuit through a preset pin based on a serial peripheral interface communication protocol.
Optionally, the output circuit comprises a color temperature control module and a brightness control module, wherein the color temperature control module comprises a first color temperature control module and a second color temperature control module, and the brightness control module comprises a first brightness control module and a second brightness control module;
the first color temperature control module comprises a third resistor, a fifth resistor, a seventh resistor, a ninth resistor, a second MOS (metal oxide semiconductor) tube, a fourth triode and a fifth MOS tube;
the first end of the ninth resistor is connected with the second pin of the main control chip, the second end of the ninth resistor is connected with the grid electrode of the fifth MOS tube, the drain electrode of the fifth MOS tube is connected with the first end of the lamp group module, the first end of the seventh resistor is connected with the third pin of the main control chip, the second end of the seventh resistor is connected with the base electrode of the fourth triode, the emitting electrode of the fourth triode is grounded, the collecting electrode of the fourth triode is connected with the first end of the fifth resistor, the second end of the fifth resistor is connected with the first end of the third resistor and the grid electrode of the second MOS tube, the second end of the third resistor and the source electrode of the second MOS tube are connected and connected with a power supply voltage, and the drain electrode of the second MOS tube is connected with the drain electrode of the fifth MOS tube and the first end of the lamp group module.
Optionally, the second color temperature control module includes a fourth resistor, a sixth resistor, an eighth resistor, a tenth resistor, a first MOS transistor, a third triode, and a sixth MOS transistor;
the first end of the tenth resistor is connected with the third pin of the main control chip, the second end of the tenth resistor is connected with the grid electrode of the sixth MOS tube, the drain electrode of the sixth MOS tube is connected with the second end of the lamp group module, the first end of the eighth resistor is connected with the second pin of the main control chip, the second end of the eighth resistor is connected with the base electrode of the third triode, the emitting electrode of the third triode is grounded, the collecting electrode of the third triode is connected with the first end of the sixth resistor, the second end of the sixth resistor is connected with the first end of the fourth resistor and the grid electrode of the first MOS tube, the second end of the fourth resistor and the source electrode of the first MOS tube are connected and are connected with a power supply voltage, and the drain electrode of the first MOS tube is connected with the drain electrode of the sixth MOS tube and the second end of the lamp group module.
Optionally, the first brightness control module comprises a seventh MOS transistor, an eleventh resistor and a thirteenth resistor;
a first end of the eleventh resistor is connected with a seventh pin of the main control chip, a second end of the eleventh resistor is connected with a first end of the thirteenth resistor and a gate of the seventh MOS transistor, a second end of the thirteenth resistor is connected with a source of the seventh MOS transistor and grounded, and a drain of the seventh MOS transistor is connected with a source of the fifth MOS transistor;
the second brightness control module comprises an eighth MOS tube, a twelfth resistor and a fourteenth resistor;
the first end of the twelfth resistor is connected with a seventh pin of the main control chip, the second end of the twelfth resistor is connected with the first end of the fourteenth resistor and the gate of the eighth MOS transistor, the second end of the fourteenth resistor is connected with the source of the eighth MOS transistor and grounded, and the drain of the eighth MOS transistor is connected with the source of the sixth MOS transistor.
In addition, in order to achieve the above object, the present invention further provides a control method for adjusting a lighting parameter, where the control circuit for adjusting a lighting parameter includes:
when the key circuit receives a key instruction, the key instruction is converted into a voltage signal, and the voltage signal is sent to the main control chip;
the main control chip identifies the voltage signal, adjusts the lighting parameters of the LED lamp according to the voltage signal to obtain optimized lighting parameters, generates a control signal according to the optimized lighting parameters, and sends the control signal to the output circuit;
and the output circuit controls the LED lamp to emit light according to the control signal.
Optionally, the control signal includes a brightness control signal and a color temperature control signal, and the control method includes:
the main control chip identifies the voltage signal based on a key input port to obtain a key signal, and identifies pressing information of the key signal to obtain a target control signal;
and the main control chip adjusts the real-time value of the pulse width modulation duty ratio register according to the target control signal and a preset algorithm, and generates a brightness control signal according to the adjusted real-time value.
Optionally, the control method further includes:
the master control chip generates a high-speed pulse width modulation signal according to a preset dead zone complementary control strategy based on a built-in timer and an interrupt system, and sends the high-speed pulse width modulation signal to the output circuit;
and the output circuit adjusts the color temperature of the LED lamp according to the high-speed pulse width modulation signal.
Optionally, the control method further includes:
the memory circuit stores the optimized lighting parameters when the lighting parameter adjusting operation is not detected within a preset time length;
when the memory circuit is powered on again after power failure, the optimized lighting parameters are sent to the main control chip;
the main control chip generates a lamp effect recovery signal according to the optimized lighting parameters and sends the lamp effect recovery signal to the output circuit;
and the output circuit controls the LED lamp to emit light according to the lamp effect recovery signal.
The control circuit for adjusting the lighting parameters comprises: the key circuit, the main control chip and the output circuit; when the key circuit receives a key instruction, the key instruction is converted into a voltage signal, and the voltage signal is sent to the main control chip; the main control chip identifies the voltage signal, adjusts the lighting parameters of the LED lamp according to the voltage signal to obtain optimized lighting parameters, generates a control signal according to the optimized lighting parameters, and sends the control signal to the output circuit; and the output circuit controls the LED lamp to emit light according to the control signal. Because this application carries out the regulation of lighting parameter according to the button instruction, and then makes the LED lamp give out light according to the button instruction to realize that the colour temperature and the bright of LED lamp adjust according to the button instruction.
Drawings
FIG. 1 is a functional block diagram of a first embodiment of a control circuit for adjusting a lighting parameter according to the present invention;
FIG. 2 is a schematic diagram of a first embodiment of a power circuit for adjusting an illumination parameter according to the present invention;
FIG. 3 is a schematic diagram of a first embodiment of a key circuit for adjusting an illumination parameter according to the present invention;
FIG. 4 is a schematic diagram of a first embodiment of an output circuit of the control circuit for adjusting illumination parameters according to the present invention;
FIG. 5 is a schematic structural diagram of a lamp set module in a first embodiment of a control circuit for adjusting lighting parameters according to the present invention;
fig. 6 is a schematic structural diagram of a main control chip in a first embodiment of a control circuit for adjusting lighting parameters according to the present invention;
FIG. 7 is a schematic circuit diagram of a memory circuit in a second embodiment of a control circuit for adjusting illumination parameters according to the present invention;
FIG. 8 is a flowchart illustrating a first embodiment of a control method for adjusting an illumination parameter according to the present invention;
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | Key circuit | R0 | Pull- |
| 200 | Master control chip | R1 | A |
| 300 | Output circuit | R2 | |
| 301 | First color temperature control module | R3 | |
| 302 | Second color temperature control module | R4 | |
| 303 | First light control module | R5 | |
| 304 | Second light control module | R6 | Sixth resistor |
| Q1 | First MOS transistor | R7 | Seventh resistor |
| Q2 | Second MOS transistor | R8 | Eighth resistor |
| Q3 | Third triode | R9 | Ninth resistor |
| Q4 | The fourth triode | R10 | Tenth resistor |
| Q5 | Fifth MOS transistor | R11 | Eleventh resistor |
| Q6 | Sixth MOS transistor | R12 | Twelfth resistor |
| Q7 | Seventh MOS transistor | R13 | Tenth resistor |
| Q8 | Eighth MOS transistor | R14 | Tenth resistor |
| C1 | First capacitor | R15 | Fifteenth resistor |
| C2 | Second capacitor | R16 | Sixteenth resistor |
| C3 | Third capacitor | DZ1 | First voltage regulator tube |
| C4 | Fourth capacitor | DZ2 | Second voltage regulator tube |
| C5 | Fifth capacitor | VR1 | Voltage stabilizer |
| C6 | Sixth capacitor | SW1 | First key |
| C7 | Seventh capacitor | SW2 | Second push button |
| C8 | Eighth capacitor | SW3 | Third press key |
| D1-D8 | Light emitting diode | D10-D17 | Light emitting diode |
| P1 | Second pin of main control chip | P2 | Seventh pin of main control chip |
| P3 | Third pin of main control chip | KEY | Key pin of main control chip |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a functional block diagram of a first embodiment of a control circuit for adjusting illumination parameters according to the present invention.
As shown in fig. 1, the control circuit for adjusting the lighting parameters of the present embodiment includes: the key circuit 100, the main control chip 200 and the output circuit 300, wherein the main control chip 200 is connected to the key circuit 100 and the output circuit 300 respectively.
Of course, the control circuit for adjusting the lighting parameter in this embodiment further includes a power circuit, and referring to fig. 2, fig. 2 is a schematic circuit structure diagram of the power circuit in the first embodiment of the control circuit for adjusting the lighting parameter in the present invention. The power circuit is respectively connected with the key circuit 100 and the memory circuit, and is used for providing power supply voltage for the key circuit 100 and the memory circuit.
As shown in fig. 2, the power supply circuit includes a first voltage regulator DZ1, a second voltage regulator DZ2, a voltage regulator VR1, a seventeenth resistor R17, an eighteenth resistor R18, a ninth diode D9, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, and an eighth capacitor C8;
the anode of the ninth diode D9 is connected to a power supply, the cathode of the ninth diode D9 is connected to the seventeenth resistor R17 and the first end of the third capacitor C3, and the second end of the seventeenth resistor R17 is connected to the first end of the first regulator DZ1 and the first end of the fourth capacitor C4; a second end of the first regulator tube DZ1 is connected to a first end of the second regulator tube DZ2 and a first end of the eighteenth resistor R18, a second end of the second regulator tube is connected to a ground terminal of the regulator, a second end of the eighteenth resistor is connected to an input terminal of the regulator VR1, a first end of the fifth capacitor C5 and a first end of the sixth capacitor C6, and an output terminal of the regulator VR1 is connected to a first end of the seventh capacitor C7 and a first end of the eighth capacitor C8. A second terminal of the third capacitor C3, a second terminal of the second regulator tube DZ2, a second terminal of the fifth capacitor C5, a second terminal of the sixth capacitor C6, a second terminal of the seventh capacitor C7 and a second terminal of the eighth capacitor C8 are connected.
In specific implementation, the power circuit takes a 24V power supply, a 12V voltage is divided by a 12V voltage-regulator tube and supplied to a low-dropout linear regulator with 5V output, a 5V voltage output by a rear electrode of the low-dropout linear regulator is supplied to a key circuit and a memory circuit for use, and each capacitor in the power circuit plays a role in stabilizing the voltage.
In this embodiment, the key circuit 100 is configured to convert the key instruction into a voltage signal when receiving the key instruction, and send the voltage signal to the main control chip.
Referring to fig. 3, fig. 3 is a schematic circuit diagram of a key circuit 100 in a first embodiment of a control circuit for adjusting an illumination parameter according to the present invention.
Referring to fig. 3, the key circuit 100 includes a pull-up resistor R0, a first resistor R1, a second resistor R2, a first key SW1, a second key SW2, a third key SW3, and a first capacitor C1; the output end of the key circuit is connected with a key pin of the main control chip 200;
a first end of the pull-up resistor R0 is connected to the power circuit output terminal, and a second end of the pull-up resistor R0 is connected to a first end of the first capacitor C1, a first end of the first key SW1, a first end of the second key SW2, and a first end of the third key SW 3;
the first end of the first capacitor C1 is further connected with the key pin of the main control chip 200, the second end of the second key SW2 is connected with the first end of the first resistor R1, the second end of the third key SW3 is connected with the first end of the second resistor R2, the second end of the first capacitor C1 is connected with the second end of the first key SW1, the second end of the first resistor R1 and the second end of the second resistor R2, and the second end of the first capacitor C1 is connected with the ground.
It should be noted that the key circuit 100 is connected to the output end of the power circuit through a resistor with a preset resistance value, the preset resistance value may be determined according to actual requirements, for example, 100K Ω, the first key and the second key are respectively connected in series with resistors with different resistance values, and different voltage values are divided at the signal output end through a voltage division law to distinguish different voltage signals. The first capacitor C1 in the figure filters various noise glitches to make the key signal smoother.
It should be noted that the first key may be a power on/off key for controlling the control circuit, and the first key is used to turn on the light by clicking, turn off the light by clicking again, and turn off the light by default when power is turned on. The second key can be a color temperature adjusting key, and the color temperature adjusting key is adjusted in a gradual change mode by long pressing and stops when the color temperature boundary is reached. And switching the adjusting direction after clicking. The third key can be a brightness adjusting key, and the long-time pressing gradually changes the brightness and stops when reaching the brightness boundary. And clicking to switch the adjusting direction.
In this embodiment, the main control chip 100 is configured to identify the voltage signal, adjust lighting parameters of the LED lamp according to the voltage signal to obtain optimized lighting parameters, generate a control signal according to the optimized lighting parameters, and send the control signal to the output circuit; the output circuit is used for controlling the LED lamp to emit light according to the control signal.
Referring to fig. 4, fig. 4 is a schematic circuit diagram of an output circuit 300 in a first embodiment of the control circuit for adjusting illumination parameters according to the present invention.
Referring to fig. 4, the output circuit 300 includes a color temperature control module and a brightness control module, wherein the color temperature control module includes a first color temperature control module 301 and a second color temperature control module 302, and the brightness control module includes a first brightness control module 303 and a second brightness control module 304;
the first color temperature control module 301 comprises a third resistor R3, a fifth resistor R5, a seventh resistor R7, a ninth resistor R9, a second MOS transistor Q2, a fourth triode Q4 and a fifth MOS transistor Q5;
a first end of the ninth resistor R9 is connected to the second pin of the main control chip, a second end of the ninth resistor R9 is connected to the gate of the fifth MOS transistor Q5, the drain of the fifth MOS transistor Q5 is connected to the first terminal of the lamp set module, the first terminal of the seventh resistor R7 is connected to the third pin of the main control chip 200, a second terminal of the seventh resistor R7 is connected to the base of the fourth transistor Q4, the emitter of the fourth transistor Q4 is grounded, a collector of the fourth transistor Q4 is connected to a first terminal of the fifth resistor R5, a second terminal of the fifth resistor R5 is connected to a first terminal of the third resistor R3 and a gate of the second MOS transistor Q2, the second end of the third resistor R3 and the source of the second MOS transistor Q2 are connected and connected with a supply voltage, the drain of the second MOS transistor Q2 is connected to the drain of the fifth MOS transistor Q5 and is connected to the first end of the lamp set module.
The second color temperature control module comprises a fourth resistor R4, a sixth resistor R6, an eighth resistor R8, a tenth resistor R10, a first MOS transistor Q1, a third triode Q3 and a sixth MOS transistor Q6;
a first end of the tenth resistor R10 is connected to the third pin of the main control chip 200, a second terminal of the tenth resistor R10 is connected to the gate of the sixth MOS transistor Q6, a drain of the sixth MOS transistor Q6 is connected to a second terminal of the lamp set module, a first terminal of the eighth resistor R8 is connected to the second pin of the main control chip 200, a second terminal of the eighth resistor R8 is connected to the base of the third transistor Q3, the emitter of the third transistor Q3 is grounded, the collector of the third transistor Q3 is connected to the first end of the sixth resistor R6, a second end of the sixth resistor R6 is connected to a first end of the fourth resistor R4 and the gate of the first MOS transistor Q1, the second end of the fourth resistor R4 and the source of the first MOS transistor Q1 are connected and connected with a supply voltage, the drain of the first MOS transistor Q1 is connected to the drain of the sixth MOS transistor Q6 and is connected to the second end of the lamp set module.
The first light control module comprises a seventh MOS transistor Q7, an eleventh resistor R11 and a thirteenth resistor R13;
a first end of the eleventh resistor R11 is connected to a seventh pin of the main control chip 200, a second end of the eleventh resistor R11 is connected to a first end of the thirteenth resistor R13 and a gate of the seventh MOS transistor Q7, a second end of the thirteenth resistor R13 is connected to a source of the seventh MOS transistor Q7 and grounded, and a drain of the seventh MOS transistor Q7 is connected to a source of the fifth MOS transistor Q5;
the second light control module comprises an eighth MOS transistor Q8, a twelfth resistor R12 and a fourteenth resistor R14;
a first end of the twelfth resistor R12 is connected to a seventh pin of the main control chip, a second end of the twelfth resistor R12 is connected to a first end of the fourteenth resistor R14 and a gate of the eighth MOS transistor, a second end of the fourteenth resistor R14 is connected to a source of the eighth MOS transistor Q8 and grounded, and a drain of the eighth MOS transistor Q8 is connected to a source of the sixth MOS transistor Q6.
The control circuit for adjusting lighting parameters in this embodiment further includes a lamp set module, and referring to fig. 5, fig. 5 is a schematic structural diagram of the lamp set module in the first embodiment of the control circuit for adjusting lighting parameters in the present invention.
Referring to fig. 5, the lamp group module drives two groups of lamp beads by using two energy lines. That is, the current flows from left to right to drive one group of lamp beads, and the current flows from right to left to drive the other group of lamp beads. And various different color temperature effects can be combined according to the control of the main control chip and the output circuit. The main control chip can adjust the brightness of the whole output according to different duty ratios of PWM. The type, color and number of the lamp beads in the lamp group module can be adjusted correspondingly according to actual needs, and this embodiment is not limited herein.
In this embodiment, the main control chip 200 is configured to identify the voltage signal, adjust lighting parameters of the LED lamp according to the voltage signal to obtain optimized lighting parameters, generate a control signal according to the optimized lighting parameters, and send the control signal to the output circuit.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a main control chip in a first embodiment of the control circuit for adjusting lighting parameters of the present invention.
Referring to fig. 6, the main control chip 200 includes a ground pin GND and a pin VDD connected to a power circuit, the second pin P1, the seventh pin P2 and the third pin P3 of the main control chip 200 are connected to the output circuit 300, and the key pin P01 of the main control chip 200 is connected to the key circuit 100.
Further, in order to accurately obtain a key instruction of a user, the main control chip identifies the voltage signal based on a key input port to obtain a key signal, and identifies pressing information of the key signal to obtain a target control signal; and the main control chip adjusts the real-time value of the pulse width modulation duty ratio register according to the target control signal and a preset algorithm, and generates a brightness control signal according to the adjusted real-time value.
It should be understood that the control circuit controls the adjustment of the color temperature of the LED lamp according to the second pin P1 and the third pin P3 in the main control chip 200, and controls the brightness adjustment of the LED lamp through the seventh pin P2 in the main control chip 200, and the control signals include a brightness control signal and a color temperature control signal.
It should be noted that the key input port may be a key pin P01 in the main control chip 200, and the identification of the pressing information of the key signal may be to identify the length of the key pressing time, the release state or the pressing state of the user. The preset algorithm may be to generate a real-time value of the corresponding pwm duty register according to a time period for a user to press a key, and then generate a brightness control signal according to the adjusted real-time value. The brightness of the LED is adjusted according to the instruction of the user, the time length of the key and the releasing or pressing state.
Further, in order to better control the adjustment of the color temperature of the LED lamp, the main control chip 200 generates a high-speed pulse width modulation signal according to a preset complementary control strategy with a dead zone based on a built-in timer and an interrupt system, and sends the high-speed pulse width modulation signal to the output circuit. And the output circuit adjusts the color temperature of the LED lamp according to the high-speed pulse width modulation signal.
It should be understood that the complementary control with dead zone can control the timer to output two complementary signals and manage the instant turn-off and turn-on of the output. This time is commonly referred to as dead time, which the user adjusts according to the connected output devices and their characteristics (delay of level transitions, delay of power switches, etc.).
It should be understood that the color temperature gradual change is realized by adjusting the proportion of the high and low levels of the second pin of the main control chip and the third pin of the main control chip in one PWM period at regular time according to the adjustment direction corresponding to the user instruction, for example, the proportion of the high level output by the second pin of the main control chip in one PWM period is increased, the proportion of the high level output by the third pin of the main control chip in one PWM period is decreased, when the adjustment directions of the color temperature gradual change are opposite, the proportion of the high level output by the second pin of the main control chip in one PWM period is decreased, the proportion of the high level output by the third pin of the main control chip in one PWM period is increased, and the sum of the proportions of the high levels output by the second pin of the main control chip and the third pin of the main control chip in one PWM period is ensured to be 100%, the PWM period remains unchanged. In a PWM cycle, in the time before dead time, the second pin of the main control chip outputs high level and the third pin of the main control chip outputs low level, in the dead time, the second pin of the main control chip and the third pin of the main control chip both output low level, and after the dead time, the second pin of the main control chip outputs low level and the third pin of the main control chip outputs high level. And when the color temperature is adjusted, the second pin of the main control chip and the third pin of the main control chip output high levels, wherein one of the second pin and the third pin accounts for 100% and the other one accounts for 0% in one PWM period. There is no dead time at the color temperature boundary.
In specific implementation, when the color temperature is determined to work, a high-speed pulse width modulation signal generated by a timer and an interrupt system arranged in a main control chip according to a preset complementary control strategy with a dead zone can be that in a PWM period, after a second pin of the main control chip outputs a cycle time of 40% of a high level, the output of the second pin of the main control chip is firstly pulled to a low level and is kept for a certain time, and after a MOS transistor and a triode controlled by the second pin of the main control chip are detected to be stably cut off, the output of a third pin of the main control chip is converted from the low level to the high level and is kept for 60% of the PWM period. Before the next cycle comes, the third pin of the main control chip is firstly converted from a high level to a low level and is kept for a certain time, after an MOS (metal oxide semiconductor) tube and a triode controlled by the third pin of the main control chip are stably stopped, the operation of the PWM cycle is repeated, in one PWM cycle, in the time before dead time, the second pin of the main control chip outputs the high level and the third pin of the main control chip outputs the low level, in the dead time, the second pin of the main control chip and the third pin of the main control chip both output the low level, and after the dead time, the second pin of the main control chip outputs the low level and the third pin of the main control chip outputs the high level. In a specific implementation, the time for the second pin of the main control chip to output the high level is 40% of a PWM cycle, the time for the second pin of the main control chip to output the low level is 60% of the PWM cycle, the time for the third pin of the main control chip to output the high level is 60% of the PWM cycle, and the time for the third pin of the main control chip to output the low level is 40% of the PWM cycle, where the ratio of 40% or 60% is appropriately adjusted according to a gradual change adjustment instruction of a user, and when a boundary of color temperature adjustment is reached, the ratio of the output high levels of the second pin of the main control chip and the third pin of the main control chip in one PWM cycle is 100%, and the other is 0%.
The control circuit for adjusting the lighting parameters of the embodiment comprises: the key circuit, the main control chip and the output circuit; when the key circuit receives a key instruction, the key instruction is converted into a voltage signal, and the voltage signal is sent to the main control chip; the main control chip identifies the voltage signal, adjusts the lighting parameters of the LED lamp according to the voltage signal to obtain optimized lighting parameters, generates a control signal according to the optimized lighting parameters, and sends the control signal to the output circuit; and the output circuit controls the LED lamp to emit light according to the control signal. According to the embodiment, the illumination parameters are adjusted according to the key instructions, so that the LED lamp emits light according to the key instructions, and the color temperature and the light of the LED lamp are adjusted according to the key instructions.
Based on the above first embodiment, a second embodiment of the control circuit for adjusting the lighting parameters according to the present invention is provided.
Referring to fig. 7, fig. 7 is a schematic circuit diagram of a memory circuit in a second embodiment of a control circuit for adjusting an illumination parameter according to the present invention.
Referring to fig. 7, the memory circuit includes a fifteenth resistor R15, a sixteenth resistor R16, a second capacitor C2, and a memory chip 24C 02;
the first pin SCL of the memory chip is connected with the fifth pin of the main control chip and the first end of the sixteenth resistor R16, the third pin SDA of the memory chip is connected with the fourth pin of the main control chip and the first end of the fifteenth resistor R15, the second end of the fifteenth resistor R15 is connected with the second end of the sixteenth resistor R16, the second end of the fifteenth resistor R15 is connected with the second end of the sixteenth resistor R16, the output end of the power supply circuit, the first end of the second capacitor and the power supply pin VCC of the memory chip, and the second end of the second capacitor is connected with the ground pin GND of the memory chip and grounded.
In this embodiment, the memory circuit is configured to store the optimized lighting parameter when the lighting parameter adjustment operation is not detected within a preset time period; the memory circuit is also used for sending the optimized lighting parameters to the main control chip when the power is turned on again after power failure; the main control chip is further used for generating a lamp effect recovery signal according to the optimized lighting parameters and sending the lamp effect recovery signal to the output circuit; and the output circuit is also used for controlling the LED lamp to emit light according to the lamp effect recovery signal.
It should be noted that the preset duration may be a time length set according to actual needs, for example: the time period may be 3 seconds or 4 seconds, and the optimized lighting parameter is stored when the adjustment operation of the key circuit by the user is not detected within the preset time period.
It should be understood that the memory chip can be an AT24C 02E 2ROM chip, and the AT24C 02E 2ROM chip is a 2K Bit serial EEPROM memory (without loss of power), and contains 256 bytes inside. Inside 24C02 is an 8 byte page write buffer. The AT24C 02E 2ROM chip may be used to receive and store data.
In specific implementation, after the user adjusts the color temperature and/or the brightness according to the keys, the light effect output is immediately fixed to be the current effect, and the memory chip sends four groups of data of the current brightness, the brightness adjusting direction, the color temperature and the color temperature adjusting direction into the AT24C 02E 2ROM chip for storage according to the I2C protocol after detecting that the keys are loosened and keeping the preset time without key operation. When the control circuit for adjusting the lighting parameters is powered on again after power failure (after resetting occurs), the data of brightness, color temperature and the like which are modulated before power failure are taken out from the AT24C 02E 2ROM chip by an I2C protocol to be restored to the current lamp effect state, so that the memory restoration of the lamp effect is realized.
In this embodiment, when the memory circuit does not detect the lighting parameter adjustment operation within the preset time, the memory circuit stores the optimized lighting parameter; when the power is turned on again after the power failure, the optimized lighting parameters are sent to the main control chip; the main control chip generates a lamp effect recovery signal according to the optimized lighting parameters and sends the lamp effect recovery signal to the output circuit; and the output circuit controls the LED lamp to emit light according to the lamp effect recovery signal. The control circuit for adjusting the lighting parameters can still obtain the last data of brightness, color temperature and the like when being electrified again after power failure, so that the LED lamp is restored to the previous lamp effect state, and the memory restoration of the lamp effect is realized.
In addition, the embodiment of the invention also provides a control method for adjusting the lighting parameters.
Referring to fig. 8, fig. 8 is a schematic flowchart of a first embodiment of a control method for adjusting a lighting parameter according to the present invention, where the control method is based on the control circuit for adjusting a lighting parameter according to the above embodiments, and the control method for adjusting a lighting parameter includes:
step S10: when the key circuit receives a key instruction, the key instruction is converted into a voltage signal, and the voltage signal is sent to the main control chip;
step S20: the main control chip identifies the voltage signal, adjusts the lighting parameters of the LED lamp according to the voltage signal to obtain optimized lighting parameters, generates a control signal according to the optimized lighting parameters, and sends the control signal to the output circuit;
step S30: and the output circuit controls the LED lamp to emit light according to the control signal.
Further, the control signal includes a brightness control signal and a color temperature control signal, and the control method includes: the main control chip identifies the voltage signal based on a key input port to obtain a key signal, and identifies pressing information of the key signal to obtain a target control signal; and the main control chip adjusts the real-time value of the pulse width modulation duty ratio register according to the target control signal and a preset algorithm, and generates a brightness control signal according to the adjusted real-time value.
Further, the control method further includes: the master control chip generates a high-speed pulse width modulation signal according to a preset dead zone complementary control strategy based on a built-in timer and an interrupt system, and sends the high-speed pulse width modulation signal to the output circuit; and the output circuit adjusts the color temperature of the LED lamp according to the high-speed pulse width modulation signal.
Further, the control method further includes: the memory circuit stores the optimized lighting parameters when the lighting parameter adjusting operation is not detected within a preset time length; when the memory circuit is powered on again after power failure, the optimized lighting parameters are sent to the main control chip; the main control chip generates a lamp effect recovery signal according to the optimized lighting parameters and sends the lamp effect recovery signal to the output circuit; and the output circuit controls the LED lamp to emit light according to the lamp effect recovery signal.
The control circuit for adjusting the lighting parameters of the embodiment comprises: the key circuit, the main control chip and the output circuit; when the key circuit receives a key instruction, the key instruction is converted into a voltage signal, and the voltage signal is sent to the main control chip; the main control chip identifies the voltage signal, adjusts the lighting parameters of the LED lamp according to the voltage signal to obtain optimized lighting parameters, generates a control signal according to the optimized lighting parameters, and sends the control signal to the output circuit; and the output circuit controls the LED lamp to emit light according to the control signal. According to the embodiment, the illumination parameters are adjusted according to the key instructions, so that the LED lamp emits light according to the key instructions, and the color temperature and the light of the LED lamp are adjusted according to the key instructions.
Other embodiments or specific implementations of the control method for adjusting the lighting parameter of the present invention may refer to the above embodiments of the control circuit for adjusting the lighting parameter, and are not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., a rom/ram, a magnetic disk, an optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A control circuit for adjusting a lighting parameter, the control circuit for adjusting a lighting parameter comprising: the key circuit, the main control chip and the output circuit;
the main control chip is respectively connected with the key circuit and the output circuit;
the key circuit is used for converting the key instruction into a voltage signal and sending the voltage signal to the main control chip when the key instruction is received;
the main control chip is used for identifying the voltage signal, adjusting the lighting parameters of the LED lamp according to the voltage signal to obtain optimized lighting parameters, generating control signals according to the optimized lighting parameters, and sending the control signals to the output circuit;
the output circuit is used for controlling the LED lamp to emit light according to the control signal;
the main control chip is also used for generating a high-speed pulse width modulation signal based on a built-in timer and an interrupt system according to a preset belt dead zone complementary control strategy and sending the high-speed pulse width modulation signal to the output circuit;
the output circuit is also used for adjusting the color temperature of the LED lamp according to the high-speed pulse width modulation signal;
the control circuit for adjusting the lighting parameters further comprises a lamp group module and a memory circuit;
the lamp group module is used for driving a plurality of groups of lamp beads by adopting a plurality of energy lines and combining different color temperature effects through the flowing direction of current;
the main control chip is further used for identifying the voltage signal to obtain the adjustment direction of a user, and adjusting the proportion of high and low levels of the second pin and the third pin in one PWM period according to the adjustment direction and the voltage signal to realize color temperature gradual change;
and the memory circuit is used for sending four groups of data of the current brightness, the brightness adjusting direction, the color temperature and the color temperature adjusting direction into a preset chip for storage when the lighting parameter adjusting operation is not detected within the preset time.
2. The control circuit for adjusting lighting parameters according to claim 1, further comprising a memory circuit, wherein the memory circuit is connected to the main control chip;
the memory circuit is used for storing the optimized lighting parameters when the lighting parameter adjusting operation is not detected within the preset time;
the memory circuit is also used for sending the optimized lighting parameters to the main control chip when the power is turned on again after power failure;
the main control chip is further used for generating a lamp effect recovery signal according to the optimized lighting parameters and sending the lamp effect recovery signal to the output circuit;
and the output circuit is also used for controlling the LED lamp to emit light according to the lamp effect recovery signal.
3. The control circuit for adjusting lighting parameters of claim 2, wherein the key circuit comprises a pull-up resistor, a first resistor, a second resistor, a first key, a second key, a third key, and a first capacitor; the output end of the key circuit is connected with a key pin of the main control chip;
a first end of the pull-up resistor is connected with an output end of the power circuit, and a second end of the pull-up resistor is connected with a first end of the first capacitor, a first end of the first key, a first end of the second key and a first end of the third key;
the first end of the first capacitor is further connected with a key pin of the main control chip, the second end of the second key is connected with the first end of the first resistor, the second end of the third key is connected with the first end of the second resistor, and the second end of the first capacitor is connected with the second end of the first key, the second end of the first resistor and the second end of the second resistor and grounded.
4. The control circuit for adjusting lighting parameters of claim 3, wherein the output circuit comprises a color temperature control module and a light control module, wherein the color temperature control module comprises a first color temperature control module and a second color temperature control module, and the light control module comprises a first light control module and a second light control module;
the first color temperature control module comprises a third resistor, a fifth resistor, a seventh resistor, a ninth resistor, a second MOS (metal oxide semiconductor) tube, a fourth triode and a fifth MOS tube;
the first end of the ninth resistor is connected with the second pin of the main control chip, the second end of the ninth resistor is connected with the grid electrode of the fifth MOS tube, the drain electrode of the fifth MOS tube is connected with the first end of the lamp group module, the first end of the seventh resistor is connected with the third pin of the main control chip, the second end of the seventh resistor is connected with the base electrode of the fourth triode, the emitting electrode of the fourth triode is grounded, the collecting electrode of the fourth triode is connected with the first end of the fifth resistor, the second end of the fifth resistor is connected with the first end of the third resistor and the grid electrode of the second MOS tube, the second end of the third resistor and the source electrode of the second MOS tube are connected and connected with a power supply voltage, and the drain electrode of the second MOS tube is connected with the drain electrode of the fifth MOS tube and the first end of the lamp group module.
5. The control circuit for adjusting illumination parameters according to claim 4, wherein the second color temperature control module comprises a fourth resistor, a sixth resistor, an eighth resistor, a tenth resistor, a first MOS transistor, a third triode and a sixth MOS transistor;
the first end of the tenth resistor is connected with the third pin of the main control chip, the second end of the tenth resistor is connected with the grid electrode of the sixth MOS tube, the drain electrode of the sixth MOS tube is connected with the second end of the lamp group module, the first end of the eighth resistor is connected with the second pin of the main control chip, the second end of the eighth resistor is connected with the base electrode of the third triode, the emitting electrode of the third triode is grounded, the collecting electrode of the third triode is connected with the first end of the sixth resistor, the second end of the sixth resistor is connected with the first end of the fourth resistor and the grid electrode of the first MOS tube, the second end of the fourth resistor and the source electrode of the first MOS tube are connected and are connected with a power supply voltage, and the drain electrode of the first MOS tube is connected with the drain electrode of the sixth MOS tube and the second end of the lamp group module.
6. The control circuit for adjusting lighting parameters of any one of claims 4-5, wherein the first light control module comprises a seventh MOS transistor, an eleventh resistor, and a thirteenth resistor;
a first end of the eleventh resistor is connected with a seventh pin of the main control chip, a second end of the eleventh resistor is connected with a first end of the thirteenth resistor and a gate of the seventh MOS transistor, a second end of the thirteenth resistor is connected with a source of the seventh MOS transistor and grounded, and a drain of the seventh MOS transistor is connected with a source of the fifth MOS transistor;
the second brightness control module comprises an eighth MOS tube, a twelfth resistor and a fourteenth resistor;
the first end of the twelfth resistor is connected with a seventh pin of the main control chip, the second end of the twelfth resistor is connected with the first end of the fourteenth resistor and the gate of the eighth MOS transistor, the second end of the fourteenth resistor is connected with the source of the eighth MOS transistor and grounded, and the drain of the eighth MOS transistor is connected with the source of the sixth MOS transistor.
7. A control method for adjusting a lighting parameter, the control method being based on the control circuit for adjusting a lighting parameter as claimed in any one of claims 1 to 6, wherein the control method for adjusting a lighting parameter comprises:
when the key circuit receives a key instruction, the key instruction is converted into a voltage signal, and the voltage signal is sent to the main control chip;
the main control chip identifies the voltage signal, adjusts the lighting parameters of the LED lamp according to the voltage signal to obtain optimized lighting parameters, generates a control signal according to the optimized lighting parameters, and sends the control signal to the output circuit;
the output circuit controls the LED lamp to emit light according to the control signal;
the control method for adjusting the lighting parameters further comprises the following steps:
the master control chip generates a high-speed pulse width modulation signal according to a preset dead zone complementary control strategy based on a built-in timer and an interrupt system, and sends the high-speed pulse width modulation signal to the output circuit;
the output circuit adjusts the color temperature of the LED lamp according to the high-speed pulse width modulation signal;
the lamp group module adopts a plurality of energy lines to drive a plurality of groups of lamp beads, and different color temperature effects are combined through the flowing direction of current;
the main control chip identifies the voltage signal to obtain the adjustment direction of a user, and adjusts the proportion of high and low levels of the second pin and the third pin in a PWM period according to the adjustment direction and the voltage signal to realize color temperature gradient;
when the memory circuit does not detect the lighting parameter adjusting operation within the preset time length, the memory circuit sends four groups of data of the current brightness, the brightness adjusting direction, the color temperature and the color temperature adjusting direction into a preset chip for storage.
8. The control method for adjusting lighting parameters of claim 7, wherein the control signals comprise a brightness control signal and a color temperature control signal, the control method comprising:
the main control chip identifies the voltage signal based on a key input port to obtain a key signal, and identifies pressing information of the key signal to obtain a target control signal;
and the main control chip adjusts the real-time value of the pulse width modulation duty ratio register according to the target control signal and a preset algorithm, and generates a brightness control signal according to the adjusted real-time value.
9. A control method for adjusting a lighting parameter as recited in any one of claims 7-8, wherein said control method further comprises:
the memory circuit stores the optimized lighting parameters when the lighting parameter adjusting operation is not detected within a preset time length;
when the memory circuit is powered on again after power failure, the optimized lighting parameters are sent to the main control chip;
the main control chip generates a lamp effect recovery signal according to the optimized lighting parameters and sends the lamp effect recovery signal to the output circuit;
and the output circuit controls the LED lamp to emit light according to the lamp effect recovery signal.
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