LED circuit based on 433M radio frequency wireless remote control

Abstract

The utility model discloses an LED circuit based on 433M radio frequency wireless remote control. The LED circuit comprises a power supply module, a 433M radio frequency receiving module, an LED driving module and an LED lamp. The input end of the power supply module is used for being connected with an external power supply; the output end of the power supply module is connected with the power supply input end of the 433M radio frequency receiving module, the power supply input end of the LED driving module and the positive electrode of the LED lamp. The radio frequency input end of the 433M radio frequency receiving module is used for receiving a 433M radio frequency signal; the output end of the 433M radio frequency receiving module is connected with the signal input end of the LED driving module; and the output end of the LED driving module is connected with the negative electrode of the LED lamp. The frequency band used by the 433M radio frequency receiving module is different from the frequency bands of wireless transmission modes such as WIFI, Bluetooth and the like, so that the interference of signals with the same frequency band in a scene on the control signal of the LED lamp is reduced; and compared with an infrared remote control module, the 433M radio frequency receiving module has a farther remote control distance, so that the remote control distance of the LED lamp is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of LED lamps, in particular to an LED circuit based on 433M radio frequency wireless remote control. Background Art

[0002] At present, wireless remote control LED products on the market mainly use infrared remote control and 2.4G radio frequency remote control. However, infrared remote control and 2.4G radio frequency remote control have disadvantages such as weak penetration and small angle range. The actual remote control distance is relatively short, generally within 10 meters. In the presence of obstacles, the remote control distance will be further shortened, or even impossible to control. At the same time, the frequency band of 2.4G radio frequency remote control is the same as that of wireless transmission methods such as WIFI and Bluetooth. As a result, when the LED light is in a scene with strong WIFI, Bluetooth, etc., due to the presence of interference signals, the LED light cannot be effectively controlled remotely. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an LED circuit based on 433M radio frequency wireless remote control to increase the remote control distance of the LED lamp.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A LED circuit based on 433M radio frequency wireless remote control comprises a power supply module, a 433M radio frequency receiving module, an LED driving module and an LED lamp; the input end of the power supply module is used to be connected to an external power supply; the output end of the power supply module is respectively connected to the power supply input end of the 433M radio frequency receiving module, the power supply input end of the LED driving module and the positive pole of the LED lamp; the radio frequency input end of the 433M radio frequency receiving module is used to receive a 433M radio frequency signal; the output end of the 433M radio frequency receiving module is connected to the signal input end of the LED driving module; the output end of the LED driving module is connected to the negative pole of the LED lamp.

[0006] Furthermore, the power supply module includes a filtering unit and a DC power supply unit; the input end of the filtering circuit is used to connect to an external power supply; the output end of the filtering circuit is respectively connected to the input end of the DC power supply unit, the power supply input end of the LED driving module and the positive pole of the LED lamp; the output end of the DC power supply unit is connected to the power supply input end of the 433M RF receiving module.

[0007] Furthermore, the filtering unit includes a rectifier bridge stack, a first capacitor, a second capacitor, a first resistor and a first inductor; the input end of the rectifier bridge stack is used to connect to an external power supply; the output end of the rectifier bridge stack is respectively connected to one end of the first capacitor, one end of the first resistor and one end of the first inductor; one end of the second capacitor is respectively connected to the input end of the DC power supply unit, the other end of the first resistor and the other end of the first inductor; the other end of the second capacitor is grounded with the other end of the first capacitor.

[0008] Furthermore, it also includes a fuse resistor; the input end of the fuse resistor is used to connect to an external power supply; the output end of the fuse resistor is connected to the input end of the rectifier bridge stack.

[0009] Furthermore, the LED driving module includes a driving chip, a second resistor, a third resistor and a fourth resistor; the power input end of the driving chip is connected to one end of the second resistor, and the other end of the second resistor is connected to the output end of the power supply module; the signal input end of the driving chip is connected to the output end of the 433M RF receiving module; the current control end of the driving chip is respectively connected to one end of the third resistor and one end of the fourth resistor, and the other end of the third resistor and the other end of the fourth resistor are grounded; the output end of the driving chip is connected to the negative pole of the LED lamp.

[0010] Furthermore, the operating frequency of the driving chip is 50 Hz or 60 Hz.

[0011] Furthermore, the 433M RF receiving module includes a RF chip and a crystal oscillator; the power supply input end of the RF chip is connected to the output end of the power supply module; the RF input end of the RF chip is used to receive a 433M RF signal; the output end of the RF chip is connected to the signal input end of the driving chip; the output end of the crystal oscillator is connected to the clock input end of the RF chip.

[0012] The beneficial effects of the utility model are: a 433M radio frequency receiving module is used to replace the existing infrared remote control module or 2.4G radio frequency remote control module. Since the frequency band used by the 433M radio frequency receiving module is different from the frequency band of wireless transmission methods such as WIFI and Bluetooth, the interference of the same frequency band signal on the control signal of the LED lamp in the scene is reduced; and compared with the infrared remote control module, the 433M radio frequency receiving module has a longer remote control distance, thereby effectively improving the remote control distance of the LED lamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a module schematic diagram of an LED circuit based on 433M radio frequency wireless remote control in an embodiment of the utility model;

[0014] Figure 2 This is a schematic diagram of the use of an LED circuit based on 433M radio frequency wireless remote control in an embodiment of the utility model;

[0015] Figure 3 This is a circuit connection diagram of an LED circuit based on 433M radio frequency wireless remote control in an embodiment of the utility model;

[0016] Description of labels:

[0017] 1. Power supply module; 11. Filter unit; 12. DC power supply unit; 2. 433M RF receiving module; 3. LED driver module; 4. LED lamp; BR, rectifier bridge stack; C1, first capacitor; E1, second capacitor; R1, first resistor; L1, first inductor; F, fuse resistor; IC1, driver chip; R2, second resistor; R3, third resistor; R4, fourth resistor. DETAILED DESCRIPTION

[0018] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0019] Please refer to Figure 1 , an LED circuit based on 433M radio frequency wireless remote control, comprising a power supply module, a 433M radio frequency receiving module, an LED driving module and an LED lamp; the input end of the power supply module is used to connect to an external power supply; the output end of the power supply module is respectively connected to the power supply input end of the 433M radio frequency receiving module, the power supply input end of the LED driving module and the positive pole of the LED lamp; the radio frequency input end of the 433M radio frequency receiving module is used to receive a 433M radio frequency signal; the output end of the 433M radio frequency receiving module is connected to the signal input end of the LED driving module; the output end of the LED driving module is connected to the negative pole of the LED lamp.

[0020] From the above description, it can be seen that the beneficial effects of the utility model are: a 433M radio frequency receiving module is used to replace the existing infrared remote control module or 2.4G radio frequency remote control module. Since the frequency band used by the 433M radio frequency receiving module is different from the frequency band of wireless transmission methods such as WIFI and Bluetooth, the interference of the same frequency band signal on the control signal of the LED lamp in the scene is reduced; and compared with the infrared remote control module, the 433M radio frequency receiving module has a longer remote control distance, thereby effectively improving the remote control distance of the LED lamp.

[0021] Furthermore, the power supply module includes a filtering unit and a DC power supply unit; the input end of the filtering circuit is used to connect to an external power supply; the output end of the filtering circuit is respectively connected to the input end of the DC power supply unit, the power supply input end of the LED driving module and the positive pole of the LED lamp; the output end of the DC power supply unit is connected to the power supply input end of the 433M RF receiving module.

[0022] From the above description, it can be seen that the filter unit filters the input power supply and outputs a relatively stable power supply to the DC power supply unit, and then the DC power supply unit further converts the power supply into a stable power supply required by the 433M RF receiving module, so that the 433M RF receiving module can work stably and provide control signals for the LED driving module.

[0023] Furthermore, the filtering unit includes a rectifier bridge stack, a first capacitor, a second capacitor, a first resistor and a first inductor; the input end of the rectifier bridge stack is used to connect to an external power supply; the output end of the rectifier bridge stack is respectively connected to one end of the first capacitor, one end of the first resistor and one end of the first inductor; one end of the second capacitor is respectively connected to the input end of the DC power supply unit, the other end of the first resistor and the other end of the first inductor; the other end of the second capacitor is grounded with the other end of the first capacitor.

[0024] From the above description, it can be seen that after the industrial frequency AC power is rectified into DC power by the rectifier bridge stack, the DC power is filtered by the first capacitor, the second capacitor, the first resistor and the first inductor, thereby providing stable DC power for subsequent modules.

[0025] Furthermore, it also includes a fuse resistor; the input end of the fuse resistor is used to connect to an external power supply; the output end of the fuse resistor is connected to the input end of the rectifier bridge stack.

[0026] It can be seen from the above description that by providing a fuse resistor, the circuit can be cut off when a circuit fault occurs, thereby protecting the circuit and avoiding the danger of the circuit burning.

[0027] Furthermore, the LED driving module includes a driving chip, a second resistor, a third resistor and a fourth resistor; the power input end of the driving chip is connected to one end of the second resistor, and the other end of the second resistor is connected to the output end of the power supply module; the signal input end of the driving chip is connected to the output end of the 433M RF receiving module; the current control end of the driving chip is respectively connected to one end of the third resistor and one end of the fourth resistor, and the other end of the third resistor and the other end of the fourth resistor are grounded; the output end of the driving chip is connected to the negative pole of the LED lamp.

[0028] From the above description, it can be seen that a linear constant current control circuit is formed by the driving chip, the second resistor, the third resistor and the fourth resistor, and the second resistor is used as a current limiting resistor to provide a stable power input for the driving chip, and the third resistor and the fourth resistor are used as detection resistors to control the current of the LED lamp, thereby effectively controlling the LED lamp.

[0029] Furthermore, the operating frequency of the driving chip is 50 Hz or 60 Hz.

[0030] From the above description, it can be seen that the operating frequency of the driver chip is 50Hz or 60Hz, that is, the operating frequency of the driver chip is a low-frequency industrial frequency, and there is no high-frequency interference signal, thereby solving the interference problem of conventional switching circuits on 433M RF circuits.

[0031] Furthermore, the 433M RF receiving module includes a RF chip and a crystal oscillator; the power supply input end of the RF chip is connected to the output end of the power supply module; the RF input end of the RF chip is used to receive a 433M RF signal; the output end of the RF chip is connected to the signal input end of the driving chip; the output end of the crystal oscillator is connected to the clock input end of the RF chip.

[0032] From the above description, it can be seen that the 433M RF receiving module is composed of a RF chip and a crystal oscillator, and the crystal oscillator provides an accurate clock signal for the RF chip, so that the RF chip works within a stable frequency range.

[0033] The LED circuit based on 433M radio frequency wireless remote control provided by the utility model can be applied to remote control LED lamp scenes to improve the control effect of LED lamps. The following is an explanation through specific implementation methods:

[0034] Embodiment 1

[0035] Please refer to Figure 1 as well as Figure 2, an LED circuit based on 433M radio frequency wireless remote control, comprising a power supply module 1, a 433M radio frequency receiving module 2, an LED driving module 3 and an LED lamp 4; the input end of the power supply module 1 is used to connect to an external power supply; the output end of the power supply module 1 is respectively connected to the power supply input end of the 433M radio frequency receiving module 2, the power supply input end of the LED driving module 3 and the positive electrode of the LED lamp 4; the radio frequency input end of the 433M radio frequency receiving module 2 is used to receive a 433M radio frequency signal, that is, a corresponding 433M radio frequency transmitting module is provided on the remote control, and a 433M radio frequency signal is sent to the 433M radio frequency receiving module 2 through the 433M radio frequency transmitting module; the output end of the 433M radio frequency receiving module 2 is connected to the signal input end of the LED driving module 3; the output end of the LED driving module 3 is connected to the negative electrode of the LED lamp 4. Among them, the power supply module 1 includes a filtering unit 11 and a DC power supply unit 12; the input end of the filtering circuit is used to connect to an external power supply; the output end of the filtering circuit is respectively connected to the input end of the DC power supply unit 12, the power supply input end of the LED driving module 3 and the positive pole of the LED lamp 4; the output end of the DC power supply unit 12 is connected to the power supply input end of the 433M RF receiving module 2.

[0036] Please refer to Figure 3 The filtering unit 11 includes a rectifier bridge BR, a first capacitor C1, a second capacitor E1, a first resistor R1 and a first inductor L1; the input end of the rectifier bridge BR is used to connect to an external power supply; the output end of the rectifier bridge BR is respectively connected to one end of the first capacitor C1, one end of the first resistor R1 and one end of the first inductor L1; one end of the second capacitor E1 is respectively connected to the input end of the DC power supply unit 12, the other end of the first resistor R1 and the other end of the first inductor L1; the other end of the second capacitor E1 is grounded with the other end of the first capacitor C1; the second capacitor E1 is an electrolytic capacitor, and its positive electrode is used as the output end of the filtering unit 11. In order to cut off the circuit in case of a fault, a fuse resistor F is also provided at the input end of the rectifier bridge stack BR; the input end of the fuse resistor F is used to connect to an external power supply; the output end of the fuse resistor F is connected to the input end of the rectifier bridge stack BR; wherein the fuse resistor F is arranged at the live wire connection end; the DC power supply unit 12 is powered by an AC-DC switching power supply, and is composed of a main power supply IC, an energy storage type inductor and a filter capacitor; the models of the main power supply IC include BP2525, the energy storage type inductor is selected according to actual needs, and the capacitance of the filter capacitor is 47uf, which is used to power the 433M RF receiving module 2.

[0037] The LED driving module 3 includes a driving chip IC1, a second resistor R2, a third resistor R3 and a fourth resistor R4, and the operating frequency of the driving chip IC1 is 50Hz or 60Hz; the power input terminal (VIN) of the driving chip IC1 is connected to one end of the second resistor R2, and the other end of the second resistor R2 is connected to the output end of the power supply module 1; the signal input terminal (DIM) of the driving chip IC1 is connected to the output end of the 433M radio frequency receiving module 2; the current control terminal (CS) of the driving chip IC1 is respectively connected to one end of the third resistor R3 and one end of the fourth resistor R4, and the other end of the third resistor R3 and the other end of the fourth resistor R4 are grounded and connected to the ground terminal of the driving chip IC1; the output end of the driving chip IC1 is connected to the negative electrode of the LED lamp 4;

[0038] The 433M RF receiving module 2 includes a RF chip and a crystal oscillator; for example, the RF chip is of model WS490, and the frequency of the crystal oscillator is 13.5MHz; the power supply input end of the RF chip is connected to the output end of the power supply module 1; the RF input end of the RF chip is used to receive a 433M RF signal; the output end of the RF chip is connected to the signal input end of the driver chip IC1; the output end of the crystal oscillator is connected to the clock input end of the RF chip; at the same time, electronic devices such as inductors and capacitors are also arranged on the periphery of the RF chip to enable the RF chip to work normally.

[0039] Although 433M RF has strong penetration and long remote control distance, 433M RF remote control is easily interfered by high-frequency circuits such as switching power supplies, which shortens the remote control distance or fails to operate normally. In this embodiment, the above circuit design can reduce circuit interference and increase the remote control distance to more than 20 meters. The specific principle is as follows:

[0040] After the circuit receives power from the live wire and the neutral wire, the rectifier bridge BR performs a rectifier function to rectify the industrial frequency AC power into DC power; the power is then filtered by a filter circuit composed of a first capacitor C1, a second capacitor E1, a first inductor L1, and a first resistor R1, and then output to a subsequent power-consuming module; the DC power supply unit 12 provides a DC voltage for the 433M RF receiving module 2; the 433M RF receiving module 2 is used to receive remote control signals, and output the received signals in the form of PWM to the LED driving module 3, and then the LED driving module 3 performs dimming and other controls according to control signals such as PWM; wherein the LED driving module 3 is composed of the driver chip IC1, the second resistor R2, the third resistor R3, and the fourth resistor R4 to form an LED linear constant current control circuit, and the linear circuit Replace the conventional switching power supply circuit; the operating frequency is a low-frequency power frequency of 50Hz or 60Hz, there is no high-frequency interference signal, and the interference problem of the conventional switching circuit on the 433M radio frequency circuit is solved; wherein the driver chip IC1 is a linear constant current main control IC; the second resistor R2 is a current limiting resistor, which plays a current limiting role and provides a suitable working voltage and current for the VIN pin of the driver chip IC1; the third resistor R3 and the fourth resistor R4 are detection resistors, and the LED current is set by adjusting their resistance values; LED+ and LED- are external LED light source loads, wherein one end of LED+ is connected to the circuit high-voltage bus and is connected to the positive pole of the external LED lamp 4; one end of LED- is connected to the Drain pin of the driver chip IC1, connected to its internal constant current loop, and connected to the negative pole of the external LED lamp 4. By using 433 radio frequency remote control in LED lighting products and matching the linear constant current drive of IC; because the linear constant current drive is small in size and has no interference, the compact and small-volume product design and long-distance remote control effect are achieved.

[0041] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A LED circuit based on 433M radio frequency wireless remote control, characterized in that: Including power supply module, 433M RF receiving module, LED driver module and LED lamp; The input end of the power supply module is used to connect to an external power supply; The output end of the power supply module is respectively connected to the power supply input end of the 433M RF receiving module, the power supply input end of the LED driving module and the positive electrode of the LED lamp; The radio frequency input end of the 433M radio frequency receiving module is used to receive a 433M radio frequency signal; The output end of the 433M radio frequency receiving module is connected to the signal input end of the LED driving module; The output end of the LED driving module is connected to the cathode of the LED lamp.

2. According to claim 1, a LED circuit based on 433M radio frequency wireless remote control is characterized in that: The power supply module includes a filter unit and a DC power supply unit; The input end of the filter unit is used to connect to an external power supply; The output end of the filter unit is respectively connected to the input end of the DC power supply unit, the power supply input end of the LED driving module and the positive electrode of the LED lamp; The output end of the DC power supply unit is connected to the power supply input end of the 433M RF receiving module.

3. According to claim 2, a LED circuit based on 433M radio frequency wireless remote control is characterized in that: The filtering unit includes a rectifier bridge stack, a first capacitor, a second capacitor, a first resistor and a first inductor; The input end of the rectifier bridge stack is used to connect to an external power supply; The output end of the rectifier bridge stack is respectively connected to one end of the first capacitor, one end of the first resistor and one end of the first inductor; One end of the second capacitor is respectively connected to the input end of the DC power supply unit, the other end of the first resistor and the other end of the first inductor; The other end of the second capacitor is grounded to the same ground as the other end of the first capacitor.

4. The LED circuit based on 433M radio frequency wireless remote control according to claim 3 is characterized in that: Also includes a fuse resistor; The input end of the safety resistor is used to connect to an external power supply; The output end of the fuse resistor is connected to the input end of the rectifier bridge stack.

5. The LED circuit based on 433M radio frequency wireless remote control according to claim 1, characterized in that: The LED driving module includes a driving chip, a second resistor, a third resistor and a fourth resistor; The power input terminal of the driving chip is connected to one end of the second resistor, and the other end of the second resistor is connected to the output terminal of the power supply module; The signal input end of the driving chip is connected to the output end of the 433M RF receiving module; The current control end of the driving chip is respectively connected to one end of the third resistor and one end of the fourth resistor, and the other end of the third resistor and the other end of the fourth resistor are grounded; The output end of the driving chip is connected to the negative electrode of the LED lamp.

6. The LED circuit based on 433M radio frequency wireless remote control according to claim 5, characterized in that: The operating frequency of the driving chip is 50 Hz or 60 Hz.

7. The LED circuit based on 433M radio frequency wireless remote control according to claim 5, characterized in that: The 433M radio frequency receiving module includes a radio frequency chip and a crystal oscillator; The power supply input terminal of the radio frequency chip is connected to the output terminal of the power supply module; The radio frequency input end of the radio frequency chip is used to receive a 433M radio frequency signal; The output end of the radio frequency chip is connected to the signal input end of the driving chip; The output end of the crystal oscillator is connected to the clock input end of the radio frequency chip.

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