RGBY four-color LED intelligent regulation and control system and method

Abstract

The invention provides an RGBY four-color LED intelligent regulation and control system and method, and the system comprises an input unit which is used for receiving a trigger signal; the control unit is connected with the input unit and the LED unit; the control unit is used for receiving a trigger signal of the input unit and outputting a PWM signal with a corresponding duty ratio to an LED with a corresponding color in the LED unit based on the trigger signal; and the LED unit comprises a red light LED, a green light LED, a blue light LED and a yellow light LED, and is used for receiving the PWM signal sent by the control unit and driving the light output of the LED with the corresponding color based on the duty ratio of the PWM signal. The brightness of different lamp beads is controlled based on the PWM mode, the control cost is low, the rapid color and light adjusting function is achieved, and light output of LEDs with different light emitting colors under the corresponding light emitting intensity can be conveniently displayed.

Description

Technical Field

[0001] The present invention relates to the field of RGBY LED systems, and more specifically, to a system and method for controlling the output power of four color LEDs, red, green, blue and yellow, by PWM mode to demonstrate the excellent performance of the RGBY LED system. Background Art

[0002] The traditional RGB LED system synthesizes light of various colors by adding and mixing the output light of the three primary colors of LEDs, red (R), green (G), and blue (B), in different proportions.

[0003] However, the color quality of RGB LED mixing may be affected by many factors, such as the spectral distribution of LEDs, color temperature, brightness, color rendering, etc. Among these factors, the spectral distribution of LEDs is one of the main factors affecting the quality of mixed colors. If the spectral distribution of LEDs is uneven, or there is spectral overlap during the mixing process, the quality of the mixed color will be reduced.

[0004] Compared with the traditional RGB LED system, the RGBY LED system adds yellow LEDs, which broadens the spectrum range and improves the color quality of the system's output light. In addition, since the human eye is more sensitive to yellow light, adding yellow LEDs can also increase the overall luminous flux output of the system.

[0005] At present, the brightness of LED lamp beads in RGBY LED systems is usually controlled by changing the current. However, this method is relatively complicated; usually the current and voltage that a switching power supply can output are fixed. Only by connecting resistors of different resistance values ​​in series in the circuit can the output current of the power supply be changed. However, connecting resistors in series in the circuit will increase the energy loss of the circuit, and the lost current will be converted into heat, thereby increasing the thermal management cost of the system. In addition, the method of connecting resistors in series or sliding rheostats is also difficult to accurately control the current at a low cost, and this control method will greatly increase the overall size of the system.

[0006] Therefore, there is an urgent need for an efficient and convenient LED lamp brightness control solution. Summary of the invention

[0007] The purpose of the present invention is to address the problems existing in the current LED lamp bead brightness control and propose an RGBY four-color LED intelligent control system and method. The system controls the brightness of different lamp beads based on the PWM method, has a low control cost, has the function of fast color adjustment and dimming, and can conveniently display the corresponding light output of different luminous color LEDs at different luminous intensities.

[0008] The technical solution of the present invention is:

[0009] The present invention provides an RGBY four-color LED intelligent control system, which includes:

[0010] An input unit, used for receiving a trigger signal;

[0011] A control unit connected to the input unit and the LED unit; the control unit is used to receive a trigger signal from the input unit, and output a PWM signal with a corresponding duty cycle to a corresponding color LED in the LED unit based on the trigger signal;

[0012] The LED unit includes a red LED, a green LED, a blue LED and a yellow LED, and is used to receive a PWM signal sent by a control unit and drive the light output of the corresponding color LED based on the duty cycle of the PWM signal.

[0013] Furthermore, the input unit uses four touch switches corresponding to the four colors RGBY respectively.

[0014] Furthermore, the touch switch can generate a trigger signal corresponding to the number of presses, and each trigger signal corresponds to a corresponding duty cycle of the PWM signal.

[0015] Furthermore, the control unit includes an MCU and four groups of light output control circuits;

[0016] The light output control circuit comprises an LED lamp bead, a transistor, a voltage source and a resistor; the positive electrode of the LED lamp bead is connected to the voltage source, the negative electrode is connected to the collector of the transistor, the emitter of the transistor is grounded, and the base is connected in series with a resistor to output a PWM signal;

[0017] By controlling the duty cycle of the PWM signal, the light output of the corresponding color LED lamp beads is adjusted to meet the brightness requirements of the corresponding color.

[0018] Furthermore, when the base of the transistor receives a high-level signal output by the MCU, the LED lamp bead lights up; when the base of the transistor receives a low-level signal output by the MCU, the LED lamp bead turns off.

[0019] Furthermore, the voltage source is a +5V voltage source, and the transistor is an NPN transistor.

[0020] Furthermore, the resistor is a 1000 ohm resistor.

[0021] Furthermore, the system also includes a display unit, the display unit includes four digital tubes, and the four digital tubes are matched with corresponding color LEDs and touch switches respectively;

[0022] When the touch switch 1 is pressed, the control unit sends a PWM signal to the red LED, and the digital tube 1 displays the duty cycle intensity of the corresponding PWM signal;

[0023] When the second touch switch is pressed, the control unit sends a PWM signal to the green LED, and the second digital tube displays the duty cycle intensity of the corresponding PWM signal;

[0024] When the touch switch 3 is pressed, the control unit sends a PWM signal to the blue LED, and the digital tube 3 displays the duty cycle intensity of the corresponding PWM signal;

[0025] When the touch switch four is pressed, the control unit sends a PWM signal to the yellow LED, and the digital tube four displays the duty cycle intensity of the corresponding PWM signal.

[0026] A RGBY four-color LED intelligent control method, based on the intelligent control system, the method includes:

[0027] receiving a trigger signal via an input unit;

[0028] Based on the trigger signal, a PWM signal with a corresponding duty cycle is output to the corresponding color LED in the LED unit.

[0029] Furthermore, a corresponding trigger signal is generated by pressing the touch switch a corresponding number of times, and the duty cycle of the PWM signal is adjusted based on the trigger signal to control the brightness of the LED.

[0030] Beneficial effects of the present invention:

[0031] The present invention is based on PWM technology and realizes signal control by changing the pulse width of the signal. The PWM signal consists of a periodic square wave with a fixed frequency and an adjustable duty cycle. The duty cycle represents the ratio of the time of a high-level pulse to a cycle. By adjusting the duty cycle, the average power or voltage of the output signal is controlled. The system of the present invention outputs PWM signals with different duty cycles through the MCU to control the brightness of the LED.

[0032] The present invention uses PWM technology, which has the following advantages:

[0033] 1. Precise control: By adjusting the duty cycle of the PWM signal, the output signal can be precisely controlled to meet the needs of different applications;

[0034] 2. Efficient energy conversion: It can achieve efficient energy conversion, reduce energy loss, and improve system efficiency;

[0035] 3. Simple implementation: The light output control circuit of the present invention is relatively simple, easy to design and implement, and has low cost;

[0036] 4. Strong adaptability: PWM technology can adapt to different inputs.

[0037] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0039] Figure 1 The system principle diagram of the present invention is shown.

[0040] Figure 2 A light output control circuit diagram according to an embodiment of the present invention is shown.

[0041] Figure 3 FIG. 4 is a schematic diagram showing relative spectral intensity of a red LED according to an embodiment of the present invention.

[0042] Figure 4 A schematic diagram of relative spectral intensity of a green LED according to an embodiment of the present invention is shown.

[0043] Figure 5 A schematic diagram of relative spectral intensity of a blue light LED according to an embodiment of the present invention is shown.

[0044] Figure 6 FIG. 4 is a schematic diagram showing relative spectral intensity of a yellow LED according to an embodiment of the present invention.

[0045] Figure 7 A schematic diagram showing relative spectral intensities of red, green, blue and yellow LEDs according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0046] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0047] The present invention provides an RGBY four-color LED intelligent control system, please refer to Figure 1 The system comprises:

[0048] An input unit, used for receiving a trigger signal;

[0049] A control unit connected to the input unit and the LED unit; the control unit is used to receive a trigger signal from the input unit, and output a PWM signal with a corresponding duty cycle to a corresponding color LED in the LED unit based on the trigger signal;

[0050] The LED unit includes a red LED, a green LED, a blue LED and a yellow LED, and is used to receive a PWM signal sent by a control unit and drive the light output of the corresponding color LED based on the duty cycle of the PWM signal.

[0051] The input unit uses four touch switches corresponding to the four colors of RGBY respectively. The touch switches can generate trigger signals corresponding to the number of presses, and each trigger signal corresponds to a corresponding duty cycle of the PWM signal.

[0052] The control unit includes an MCU and four sets of light output control circuits. Please refer to Figure 2 The light output control circuit includes an LED lamp bead, a transistor, a voltage source and a resistor; the positive electrode of the LED lamp bead is connected to the voltage source, the negative electrode is connected to the collector of the transistor, the emitter of the transistor is grounded, and the base is connected in series with a resistor to output a PWM signal;

[0053] By controlling the duty cycle of the PWM signal, the light output of the corresponding color LED lamp beads is adjusted to meet the brightness requirements of the corresponding color;

[0054] Wherein: the voltage source adopts a +5V voltage source, the transistor adopts an NPN transistor, and the resistor adopts a 1000 ohm resistor.

[0055] In this embodiment, when the base of the transistor receives a high-level signal output by the MCU, the LED lamp bead lights up; when the base of the transistor receives a low-level signal output by the MCU, the LED lamp bead turns off.

[0056] The system also includes a display unit, which includes four digital tubes, and the four digital tubes are matched with corresponding color LEDs and touch switches respectively;

[0057] When the touch switch 1 is pressed, the control unit sends a PWM signal to the red LED, and the digital tube 1 displays the duty cycle intensity of the corresponding PWM signal;

[0058] When the second touch switch is pressed, the control unit sends a PWM signal to the green LED, and the second digital tube displays the duty cycle intensity of the corresponding PWM signal;

[0059] When the touch switch 3 is pressed, the control unit sends a PWM signal to the blue LED, and the digital tube 3 displays the duty cycle intensity of the corresponding PWM signal;

[0060] When the touch switch four is pressed, the control unit sends a PWM signal to the yellow LED, and the digital tube four displays the duty cycle intensity of the corresponding PWM signal.

[0061] In this embodiment, the system consists of four main parts: input unit, display unit, control unit and LED unit. Just press the touch switch lightly to send a signal to the MCU. The MCU will output PWM waves with different duty cycles to the corresponding LEDs, and the digital tube will display the intensity of the duty cycle. By adjusting the duty cycle corresponding to different color LEDs, the light output of the LED lamp bead can be controlled. By adjusting the light output of these four color LEDs, the color and brightness of the system light output can achieve a specific effect.

[0062] Specifically, pressing the touch switch 1-9 times sets the duty cycle intensity to 1-9 levels, and the corresponding PWM duty cycles are: 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% respectively;

[0063] Pressing the touch switch once can control the duty cycle sent by the MCU to the red LED to be 10%, and the digital tube shows that the intensity of the corresponding duty cycle is level 1;

[0064] Press the touch switch 2 twice to control the duty cycle sent by the MCU to the green LED to 20%, and the intensity of the corresponding duty cycle displayed on the digital tube 2 is level 2;

[0065] Press the touch switch three times to control the duty cycle sent by the MCU to the blue LED to 30%, and the digital tube three displays the corresponding duty cycle intensity as level 3;

[0066] Pressing the touch switch 4 4 times can control the duty cycle sent by the MCU to the golden LED to 40%, and the digital tube 4 displays the corresponding duty cycle intensity as 4 levels.

[0067] The positive pole of the LED lamp bead is connected to the +5V voltage source, and the negative pole is connected to the collector of the NPN transistor. The emitter of the transistor is grounded, and a 1000 ohm resistor is connected in series to the base. When the base receives a high-level signal output by the MCU, the LED lamp bead will light up; and when the base receives a low-level signal output by the MCU, the LED lamp bead will go out. Therefore, by controlling the duty cycle and frequency of the PWM signal, the light output of LED lamp beads of various colors can be accurately controlled to meet different color and brightness requirements.

[0068] Another embodiment of the present invention further provides an RGBY four-color LED intelligent control method, based on the intelligent control system, the method includes:

[0069] receiving a trigger signal via an input unit;

[0070] Based on the trigger signal, a PWM signal with a corresponding duty cycle is output to the corresponding color LED in the LED unit.

[0071] Among them, a corresponding trigger signal is generated by pressing the touch switch a corresponding number of times, and the duty cycle of the PWM signal is adjusted based on the trigger signal to control the brightness of the LED.

[0072] The present invention is based on PWM technology and realizes signal control by changing the pulse width of the signal. The PWM signal consists of a periodic square wave with a fixed frequency and an adjustable duty cycle. The duty cycle represents the ratio of the time of the high-level pulse to one cycle. By adjusting the duty cycle, the average power or voltage of the output signal is controlled.

[0073] The system of the present invention includes yellow light, can output light with higher light quality, outputs PWM signals with different duty cycles through MCU to control the brightness of LED, and has the characteristics of being fast, convenient and portable.

[0074] like Figure 3-7 As shown, there are spectra of the red LED, green LED, and blue LED lit individually, the spectra of the red, green, and blue LEDs lit simultaneously, and the spectra of the red, green, blue, and yellow LEDs lit simultaneously.

[0075] Compared with the RGB three-color LED system, the RGBY four-color LED system has a wider spectrum coverage and can mix more colors and higher quality light.

[0076] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. An RGBY four-color LED intelligent control system, characterized in that: The system includes: An input unit, used for receiving a trigger signal; A control unit connected to the input unit and the LED unit; the control unit is used to receive a trigger signal from the input unit, and output a PWM signal with a corresponding duty cycle to a corresponding color LED in the LED unit based on the trigger signal; The LED unit includes a red LED, a green LED, a blue LED and a yellow LED, and is used to receive a PWM signal sent by a control unit and drive the light output of the corresponding color LED based on the duty cycle of the PWM signal.

2. The RGBY four-color LED intelligent control system according to claim 1, characterized in that: The input unit uses four touch switches corresponding to the four colors RGBY respectively.

3. The RGBY four-color LED intelligent control system according to claim 2 is characterized in that: The touch switch can generate a trigger signal corresponding to the number of presses, and each trigger signal corresponds to a corresponding duty cycle of the PWM signal.

4. The RGBY four-color LED intelligent control system according to claim 1, characterized in that: The control unit includes an MCU and four groups of light output control circuits; The light output control circuit comprises an LED lamp bead, a transistor, a voltage source and a resistor; the positive electrode of the LED lamp bead is connected to the voltage source, the negative electrode is connected to the collector of the transistor, the emitter of the transistor is grounded, and the base is connected in series with a resistor to output a PWM signal; By controlling the duty cycle of the PWM signal, the light output of the corresponding color LED lamp beads is adjusted to meet the brightness requirements of the corresponding color.

5. The RGBY four-color LED intelligent control system according to claim 3, characterized in that: When the base of the transistor receives a high-level signal output by the MCU, the LED lamp bead lights up; when the base of the transistor receives a low-level signal output by the MCU, the LED lamp bead goes out.

6. The RGBY four-color LED intelligent control system according to claim 1, characterized in that: The voltage source is a +5V voltage source, and the transistor is an NPN transistor.

7. The RGBY four-color LED intelligent control system according to claim 1, characterized in that: The resistor is a 1000 ohm resistor.

8. The RGBY four-color LED intelligent control system according to claim 3, characterized in that: The system also includes a display unit, which includes four digital tubes, and the four digital tubes are matched with corresponding color LEDs and touch switches respectively; When the touch switch 1 is pressed, the control unit sends a PWM signal to the red LED, and the digital tube 1 displays the duty cycle intensity of the corresponding PWM signal; When the second touch switch is pressed, the control unit sends a PWM signal to the green LED, and the second digital tube displays the duty cycle intensity of the corresponding PWM signal; When the touch switch 3 is pressed, the control unit sends a PWM signal to the blue LED, and the digital tube 3 displays the duty cycle intensity of the corresponding PWM signal; When the touch switch four is pressed, the control unit sends a PWM signal to the yellow LED, and the digital tube four displays the duty cycle intensity of the corresponding PWM signal.

9. A RGBY four-color LED intelligent control method, based on the intelligent control system according to any one of claims 1 to 7, characterized in that: The method comprises: receiving a trigger signal via an input unit; Based on the trigger signal, a PWM signal with a corresponding duty cycle is output to the corresponding color LED in the LED unit.

10. The method according to claim 9, characterized in that A corresponding trigger signal is generated by pressing the touch switch a corresponding number of times, and the duty cycle of the PWM signal is adjusted based on the trigger signal to control the brightness of the LED.

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