PWM (Pulse Width Modulation) signal and electric energy transmission method of wireless bathtub lamp

Abstract

The invention provides a PWM (Pulse Width Modulation) signal and electric energy transmission method of a wireless bathtub lamp, which comprises the following steps of: modulating effective level signals which are generated by a signal source and are used for controlling PWM signals of an R-LED module, a G-LED module and a B-LED module with high-frequency signals corresponding to a fixed frequency generation device through a modulation amplifier to generate wireless transmission signals, and amplifying and outputting the wireless transmission signals; therefore, wireless transmission of wireless transmission signals and electric energy is realized through cooperation of the corresponding transmitting resonators and the receiving resonators. And meanwhile, corresponding PWM signals in respective wireless power transmission signals are extracted through the wireless power transmission signal extraction devices and output to drive the R-LED module, the G-LED module and the B-LED module to perform variable light emitting operation, so that the transmission speed of the PWM signals is effectively improved, synchronization of the PWM signals and LED consumed energy is realized, wireless power transmission maximum power transmission is realized, and the service life of the LED module is prolonged. The utilization rate of electric energy and the reliability of the wireless lamp are improved, and the production and use cost of the wireless lamp is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless power transmission of lamps, and in particular to a PWM signal and power transmission method of a wireless bathtub / swimming pool lamp. Background Art

[0002] In the prior art, common wireless power transmission LED lamps are classified into the following categories: (1) wireless lamps that light up as soon as they are powered on; (2) wireless lamps that are controlled by built-in control circuits and receive external signals; and (3) wireless lamps that are divided into two parts, namely, the transmitting and receiving parts, which transmit brightness coding signals, decode them after receiving, and generate PWM signals of corresponding brightness to control the color change of the LED lamp.

[0003] Among them, reference Figure 4 As shown, the implementation process of this type of wireless lamps, which is divided into two parts, sending and receiving, to control the color change of LEDs is as follows: PWM signal to brightness signal, brightness signal encoding, coded signal modulation of wireless power transmission signal, wireless power transmission, wireless power reception, signal energy separation, demodulation of coded signal, signal decoding, generation of PWM signal, control of LED drive, and LED light emission.

[0004] At present, this type of wireless lamps are generally implemented through microcontrollers and software function designs, and their control implementation processes are numerous, the circuits are relatively complex, and the transmission and reception of signals require encoding and decoding; as a result, the signal transmission speed of this type of wireless lamps is slow, the reliability needs to be improved, and the coded signal and LED energy consumption are not synchronized during signal transmission, resulting in a decrease in the maximum power of wireless transmission. Summary of the invention

[0005] In view of the technical problems in the prior art of slow signal transmission speed, low reliability and low power transmission of wireless lamps, the present invention provides a PWM signal and power transmission method for a wireless bathtub lamp.

[0006] A PWM signal and power transmission method for a wireless bathtub lamp, the wireless bathtub lamp comprises a lamp holder and a lamp body; the lamp holder is provided with a power supply module and a signal source electrically connected to the power supply module, a fixed frequency generating device, three modulation amplifiers and three transmitting resonators, the modulation amplifiers are electrically connected to the signal source and the fixed frequency generating device respectively; and the modulation amplifiers are electrically connected to the transmitting resonators one by one; the lamp body is provided with an R-LED module, a G-LED module, a B-LED module and three receiving resonators corresponding to the transmitting resonators one by one, The R-LED module, G-LED module, and B-LED module are electrically connected to the receiving resonator one by one; and a wireless power transmission signal extraction module is provided between the R-LED module / G-LED module / B-LED module and the receiving resonator electrically connected thereto; the PWM signal and power transmission method of the wireless bathtub lamp includes the following steps: S01: the user connects the power supply module in the lamp holder to the power supply, and inputs the PWM signal for controlling the R-LED module and / or the G-LED module and / or the B-LED module respectively through the signal source; S02: respectively inputs the control signal through the modulation amplifier The effective level signals of the PWM signals of the R-LED module, the G-LED module, and the B-LED module are respectively integrated with the high-frequency signals generated by the fixed frequency generating device: when the PWM signal is at an effective level, the corresponding high-frequency signal can pass through the modulation amplifier to form a wireless power transmission signal; when the PWM signal is at an invalid level, the corresponding high-frequency signal cannot pass through the modulation amplifier and does not form a wireless power transmission signal output; finally, the modulated wireless power transmission signal with a time length synchronized with the effective level of the PWM signal is further amplified and transmitted; S03: the amplified wireless The power transmission signal is sent to the corresponding receiving resonator through the corresponding transmitting resonator; S04: the receiving resonator receives the wireless power transmission signal and forms electric energy to output to the corresponding R-LED module / G-LED module / B-LED module for power supply; S05: the wireless power transmission signal of the receiving resonator is extracted through a wireless power transmission signal extraction module, and the wireless power transmission signal is rectified and shaped into a corresponding PWM signal and then output to the corresponding R-LED module / G-LED module / B-LED module to drive the R-LED module / G-LED module / B-LED module to perform a variable light emission operation.

[0007] Furthermore, the signal source is an LED controller, and the LED controller is used to output a changing PWM signal to control the lighting effects of the R-LED module, the G-LED module and the B-LED module.

[0008] Furthermore, the transmitting resonator includes a transmitting resonant coil and a capacitor C1 connected in parallel to the transmitting resonant coil, and the receiving resonator controls a receiving resonant coil and a capacitor C2 connected in parallel to the receiving resonant coil.

[0009] Furthermore, the wireless transmission signal extraction module is a detection circuit, and the detection circuit includes a diode and a filter circuit.

[0010] Furthermore, the fixed frequency generating device is an oscillator, and the oscillator is electrically connected to three modulation amplifiers respectively.

[0011] Furthermore, a MOS tube is provided between the transmitting resonator and the modulation amplifier, and the on-off of the MOS tube is controlled by the presence or absence of the wireless power transmission signal.

[0012] Furthermore, the frequency range of the high-frequency signal is 50KHZ to 500KHZ.

[0013] The beneficial effects of the present invention are as follows: the present invention provides a PWM signal and electric energy transmission method for a wireless bathtub lamp, wherein the effective level signal of the PWM signal generated by the signal source for controlling the R-LED module / G-LED module / B-LED module is modulated with the high-frequency signal corresponding to the fixed frequency generating device through a modulation amplifier to generate a wireless power transmission signal and amplify the output, thereby realizing the wireless transmission of the wireless power transmission signal and electric energy through the cooperation of the corresponding transmitting resonator and the receiving resonator; at the same time, the corresponding PWM signal in each wireless power transmission signal is extracted through a wireless power transmission signal extraction device and output to drive the R-LED module / G-LED module / B-LED module to change the light-emitting operation, thereby effectively improving the transmission speed of the PWM signal, realizing the synchronization of the PWM signal and the energy consumption of the LED, and realizing the maximum power transmission of the wireless power transmission, which is beneficial to improving the power utilization rate and the reliability of the wireless lamps, and saving the production and use costs of the wireless lamps. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A flow chart of a PWM signal and power transmission method for a wireless bathtub lamp provided by the present invention;

[0015] Figure 2 A circuit diagram of a PWM signal and power transmission method for a wireless bathtub light provided by the present invention;

[0016] Figure 3 A circuit diagram of a transmitting resonator, a wireless power transmission signal extraction module and an R-LED module provided by the present invention;

[0017] Figure 4 A simplified schematic diagram of the structure of a wireless bathtub light provided by the present invention;

[0018] Figure 5 The present invention is a flow chart showing the principle of a wireless lamp which is divided into two parts, namely, a sending part and a receiving part, for controlling the color change of an LED.

[0019] Figure ID

[0020] 1. Lamp holder; 2. Lamp body; 3. Signal source; 4. Fixed frequency generating device; 41. Oscillator; 5. Modulation amplifier; 6. Transmitting resonator; 7. R-LED module; 8. G-LED module; 9. B-LED module; 10. Receiving resonator; 11. Wireless power transmission signal extraction module; 111. Rectification circuit; 12. MOS tube. DETAILED DESCRIPTION

[0021] To further describe the present invention in detail, the following is an explanation with reference to the accompanying drawings. It is particularly noted that the embodiments described below are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] refer to Figure 2 and Figure 4 As shown, the present invention discloses a PWM signal and power transmission method of a wireless bathtub light, which is applicable to a wireless bathtub light.

[0023] Specifically, the wireless bathtub lamp comprises a lamp holder 1 and a lamp body 2 wirelessly connected to the lamp holder 1. The lamp holder 1 comprises a lamp holder body (not shown in the figure), the outer side of the lamp holder body is provided with an external thread (not shown in the figure), and the lamp holder body is fixed to a bathtub reserved installation hole (not shown in the figure) through a locking sleeve (not shown in the figure).

[0024] The lamp holder body is provided with a signal source 3, a fixed frequency generating device 4, three modulation amplifiers 5 and three transmitting resonators 6; the modulation amplifiers 5 are electrically connected to the LED controller and the fixed frequency generating device 4 respectively; and the modulation amplifiers 5 are electrically connected to the transmitting resonators 6 one by one. The lamp holder 1 is also provided with a power supply module, which is electrically connected to the signal source 3 and the fixed frequency generating device 4 respectively to supply power to the lamp holder 1.

[0025] The lamp body 2 is provided with an R-LED module 7, a G-LED module 8, a B-LED module 9, and three receiving resonators 10 corresponding to the transmitting resonator 6 one by one. The R-LED module 7, the G-LED module 8, and the B-LED module 9 are electrically connected to the receiving resonators 10 one by one respectively; and a wireless transmission signal extraction module 11 is respectively provided between the R-LED module / G-LED module / B-LED module and the receiving resonator 10 electrically connected thereto.

[0026] refer to Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, the PWM signal and power transmission method of the wireless bathtub light includes the following steps:

[0027] Step S01: The user turns on the power supply module in the lamp holder 1 and inputs the PWM signal for controlling the R-LED module and / or the G-LED module and / or the B-LED module through the signal source 3.

[0028] The signal source 3 is an LED controller, which is used to output a changing PWM signal to control the lighting effects of the R-LED module, the G-LED module and the B-LED module. The LED controller generates corresponding PWM signals according to the brightness requirements and color display effect requirements of the R-LED module 7, the G-LED module 8 and the B-LED module 9 input by the user, and adjusts the duty cycle of the PWM signal to adjust the brightness of each LED module and the display effects of various colors.

[0029] Step S02: The effective level signals of the PWM signals controlling the R-LED module 7, the G-LED module 8, and the B-LED module 9 are respectively integrated with the high frequency signals generated by the fixed frequency generating device 4 through the modulation amplifier 5 to generate wireless power transmission signals, and then amplify the signals.

[0030] The fixed frequency generating device 4 is used to generate a high frequency signal with a fixed frequency. Preferably, the fixed frequency generating device 4 is an oscillator 41, and the oscillator 41 is electrically connected to three modulation amplifiers 5 respectively. The oscillator 41 generates a high frequency signal with a fixed frequency according to preset requirements and transmits it to the corresponding modulation amplifier 5 for further processing. The frequency range of the high frequency signal is 50KHZ to 500KHZ.

[0031] The effective level signal of the PWM signal refers to the part of the PWM control signal used to control the operation of the lamp. Usually, the PWM control signal of the common cathode lamp is effective at a high level, that is, when the PWM signal is at a high level, the common cathode lamp will be activated; the PWM control signal of the common anode lamp is effective at a low level, that is, when the PWM signal is at a low level, the lamp will be activated. Therefore, when the PWM signal is in an effective level signal, the corresponding high-frequency signal can pass through the modulation amplifier 5 to form a wireless power transmission signal, thereby realizing the effective part of the PWM signal cycle, that is, when it is in an effective level signal, a wireless power transmission signal is generated, and then it can cooperate with the receiving resonator 10 to generate an alternating electric field to realize the wireless transmission of electric energy; when the PWM signal is in an invalid level signal, the corresponding high-frequency signal cannot pass through the modulation amplifier 5, and no wireless power transmission signal output is formed; in the invalid part of the PWM cycle, that is, when it is at an invalid level, no wireless power transmission signal is generated, and it cannot cooperate with the receiving resonator 10 to generate an alternating electric field. Finally, the modulated wireless power transmission signal with a duration synchronized with the effective level of the PWM signal is further amplified and transmitted.

[0032] Preferably, the generation of the PWM signal in step S01 and step S02, the generation of the high-frequency signal, and the process of modulating the PWM signal and the high-frequency signal into a wireless power transmission signal can be implemented internally through an MCU programming, which is conducive to simplifying the lamp structure and circuit complexity, and flexibly adjusting the frequency and duty cycle of the PWM signal.

[0033] A MOS tube 12 is provided between the transmitting resonator 6 and the modulating amplifier 10, and the on and off of the MOS tube 12 is controlled by the presence or absence of the wireless power transmission signal. When the wireless power transmission signal exists, the MOS tube 12 is turned on, allowing the signal to pass, and the transmitting resonator 6 and the modulating amplifier 10 to work normally. When the wireless power transmission signal does not exist, the MOS tube 12 is turned off, blocking the transmission of the signal, so that the transmitting resonator 6 and the modulating amplifier 10 stop working. This control method can be used to adjust the power output of the system to achieve effective energy transmission and energy saving.

[0034] Step S03: The amplified wireless transmission signal is sent to the corresponding receiving resonator through the corresponding transmitting resonator.

[0035] Step S04: the receiving resonator receives the wireless power transmission signal and generates electric energy to output to the corresponding R-LED module / G-LED module / B-LED module for power supply.

[0036] Step S05: extracting the wireless power transmission signal of the receiving resonator through a wireless power transmission signal extraction module, rectifying the wireless power transmission signal into a corresponding PWM signal, and outputting it to the corresponding R-LED module / G-LED module / B-LED module to drive the R-LED module / G-LED module / B-LED module to perform a variable light emission operation.

[0037] The transmitting resonator 6 receives the wireless power transmission signal and generates a fixed frequency electric energy electromagnetic field and a signal electromagnetic field; the receiving resonator 10 receives the fixed frequency electric energy electromagnetic field by using the characteristics of near field transmission and converts it into electric energy, and the electric energy is output to the R-LED module 7 or G-LED module 8 or B-LED module 9 electrically connected to the corresponding receiving resonator 11 after rectification and filtering for power supply. The receiving resonator 10 also receives the fixed frequency signal electromagnetic field by using the characteristics of near field transmission and converts it into signal electric energy, and extracts the PWM signal in the wireless power transmission signal carried in the signal electric energy through the wireless power transmission signal extraction module 11 and outputs it to the corresponding R-LED module 7 or G-LED module 8 or B-LED module 9 to control the brightness and color of the R-LED module 7 or G-LED module 8 or B-LED module 9.

[0038] In this embodiment, the transmitting resonator 6 includes a transmitting resonant coil L1 and a capacitor C1 connected in parallel to the transmitting resonant coil, and the receiving resonator 10 includes a receiving resonant coil L1 and a capacitor C2 connected in parallel to the receiving resonant coil. By using the impedance of the wireless transmission coil to realize constant current driving of the LED module, the LED driving circuit can be omitted, and the power utilization rate can be further improved.

[0039] In this embodiment, the wireless power transmission signal extraction module 11 is a detection circuit. The detection circuit includes a rectifier circuit 111 and a filter circuit. Preferably, the rectifier circuit includes a diode, and the filter circuit is composed of the receiving resonant coil L1 and a capacitor C3. The receiving resonant coil is used to receive the wireless power transmission signal and transmit it to the diode and capacitor C3. The diode and capacitor C extract the PWM signal from the wireless power transmission signal by rectifying and filtering the wireless power transmission signal, and remove high-frequency noise, so that the output signal is smoother.

[0040] The present invention provides a PWM signal and electric energy transmission method for a wireless bathtub lamp. The effective level signal of the PWM signal for controlling the R-LED module 7, G-LED module 8 or B-LED module generated by the signal source 3 is modulated with the high-frequency signal corresponding to the fixed frequency generating device 4 by a modulation amplifier 5 to generate a wireless power transmission signal and amplify the output, thereby realizing the wireless transmission of the wireless power transmission signal and electric energy through the cooperation of the corresponding transmitting resonator 6 and the receiving resonator 10; at the same time, the corresponding PWM signal in each wireless power transmission signal is extracted by the wireless power transmission signal extraction module 11 and output to drive the R-LED module 7, G-LED module 8 or B-LED module 9 to change the light-emitting operation. Compared with the method in the prior art in which the wireless lamp transmits a brightness coding signal, decodes it after receiving it, and generates a PWM signal of corresponding brightness to control the color change of the LED lamp, there is no need for the coding and decoding process, which saves related electronic components and saves the production and manufacturing cost. At the same time, the PWM signal is synchronized with the energy consumption of the LED module, and the maximum power transmission of the wireless power transmission is realized. The impedance of the wireless power transmission coil is used to realize the constant current driving of the LED, which saves the LED drive, improves the power utilization rate, and saves the use cost of the wireless lamp.

[0041] The embodiments disclosed above are only for the purpose of describing the present invention in detail and cannot be used to limit the scope of the present invention. Therefore, simple modifications and changes made according to the scope of application of the claims of the present invention still fall within the scope of protection of the present invention.

[0042] The protection scope of the present invention shall be based on the defined scope. For those skilled in the art, several improvements and modifications may be made without departing from the spirit and scope of the present invention, and these and modifications shall also be regarded as the protection scope of the present invention.

Claims

1. A PWM signal and power transmission method for a wireless bathtub light, characterized in that: The wireless bathtub lamp comprises a lamp holder and a lamp body; The lamp holder is provided with a power supply module and a signal source electrically connected to the power supply module, a fixed frequency generating device, three modulation amplifiers and three transmitting resonators, wherein the modulation amplifiers are electrically connected to the signal source and the fixed frequency generating device respectively; and the modulation amplifiers are electrically connected to the transmitting resonators one by one respectively; The lamp body is provided with an R-LED module, a G-LED module, a B-LED module and three receiving resonators corresponding to the transmitting resonator one by one, and the R-LED module, the G-LED module and the B-LED module are electrically connected to the receiving resonators one by one; and a wireless transmission signal extraction module is respectively provided between the R-LED module / G-LED module / B-LED module and the receiving resonator electrically connected thereto; The PWM signal and power transmission method of the wireless bathtub light includes the following steps: S01: The user connects the power supply module in the lamp holder to a power source, and inputs PWM signals for controlling the R-LED module and / or the G-LED module and / or the B-LED module through a signal source; S02: The effective level signals of the PWM signals controlling the R-LED module, the G-LED module, and the B-LED module are respectively integrated with the high-frequency signals generated by the fixed frequency generating device through the modulation amplifier: when the PWM signal is at an effective level, the corresponding high-frequency signal can pass through the modulation amplifier to form a wireless power transmission signal; when the PWM signal is at an invalid level, the corresponding high-frequency signal cannot pass through the modulation amplifier and does not form a wireless power transmission signal output; finally, the modulated wireless power transmission signal with a time length synchronized with the effective level of the PWM signal is formed and transmitted after further amplification; S03: The amplified wireless transmission signal is sent to the corresponding receiving resonator through the corresponding transmitting resonator; S04: The receiving resonator receives the wireless power transmission signal and generates electric energy to output to the corresponding R-LED module / G-LED module / B-LED module for power supply; S05: extracting the wireless power transmission signal of the receiving resonator through a wireless power transmission signal extraction module, rectifying the wireless power transmission signal into a corresponding PWM signal, and outputting it to the corresponding R-LED module / G-LED module / B-LED module to drive the R-LED module / G-LED module / B-LED module to perform a variable light emission operation.

2. The PWM signal and power transmission method of a wireless bathtub light according to claim 1, characterized in that: The signal source is an LED controller, and the LED controller is used to output a changing PWM signal to control the lighting effects of the R-LED module, the G-LED module and the B-LED module.

3. The PWM signal and power transmission method of a wireless bathtub light according to claim 1, characterized in that: The transmitting resonator includes a transmitting resonant coil and a capacitor C1 connected in parallel to the transmitting resonant coil, and the receiving resonator controls a receiving resonant coil and a capacitor C2 connected in parallel to the receiving resonant coil.

4. The PWM signal and power transmission method of a wireless bathtub light according to claim 1, characterized in that: The wireless transmission signal extraction module is a detection circuit, and the detection circuit includes a diode and a filter circuit.

5. The PWM signal and power transmission method of a wireless bathtub light according to claim 1, characterized in that: The fixed frequency generating device is an oscillator, and the oscillator is electrically connected to three modulation amplifiers respectively.

6. The PWM signal and power transmission method of a wireless bathtub light according to claim 1, characterized in that: A MOS tube is provided between the transmitting resonator and the modulating amplifier, and the on-off of the MOS tube is controlled by the presence or absence of the wireless power transmission signal.

7. The PWM signal and power transmission method of a wireless bathtub light according to claim 1, characterized in that: The frequency range of the high-frequency signal is 50KHZ to 500KHZ.

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