US 12,426,140 B2
PWM signal and power transmission method for wireless bathtub lamp
Ziqin Guo, Guangzhou (CN); and Bo Liang, Guangzhou (CN)
Assigned to Guangzhou Rising Dragon Recreation Industrial Co., Ltd., Guangzhou (CN)
Filed by Guangzhou Rising Dragon Recreation Industrial Co., Ltd., Guangzhou (CN)
Filed on Feb. 29, 2024, as Appl. No. 18/590,973.
Claims priority of application No. 202311444340.9 (CN), filed on Nov. 1, 2023.
Prior Publication US 2025/0142699 A1, May 1, 2025
Int. Cl. H05B 45/325 (2020.01); H02J 50/12 (2016.01); H05B 45/20 (2020.01); H05B 47/19 (2020.01)
CPC H05B 45/325 (2020.01) [H02J 50/12 (2016.02); H05B 45/20 (2020.01); H05B 47/19 (2020.01)] 7 Claims
OG exemplary drawing
 
1. A PWM signal and power transmission method for a wireless bathtub lamp, wherein the wireless bathtub lamp comprises a lamp holder and a lamp body;
a power supply module and a signal source, a fixed-frequency generation device, three modulating amplifiers and three transmitting resonators which are electrically connected to the power supply module are arranged in the lamp holder, and the modulating amplifiers are electrically connected to the signal source and the fixed-frequency generation devices; the modulating amplifiers are electrically connected to the transmitting resonators in one-to-one correspondence;
an R-LED module, a G-LED module, a B-LED module, and three receiving resonators in one-to-one correspondence with the transmitting resonators are arranged in the lamp body, and the R-LED module, the G-LED module and the B-LED module are electrically connected to the receiving resonators in one-to-one correspondence; a wireless power transmission signal extraction module is arranged between the R-LED module/G-LED module/B-LED module and the receiving resonator electrically connected to the R-LED module/G-LED module/B-LED module;
the PWM signal and power transmission method for the wireless bathtub lamp comprises the following steps:
S01: after the power supply module in the lamp holder is powered on, generating and inputting, by means of the signal source, PWM signals for controlling the R-LED module and/or G-LED module and/or B-LED module;
S02: respectively integrating, by means of the modulating amplifiers, valid level signals of the PWM signals for controlling the R-LED module, the G-LED module and the B-LED module with a high-frequency signal generated by the fixed-frequency generation device, wherein when the PWM signals are at a valid level, the corresponding high-frequency signal passes through the modulating amplifiers to form the wireless power transmission signals; when the PWM signals are at an invalid level, the corresponding high-frequency signal will not pass through the modulating amplifiers, and the wireless power transmission signals will not be formed and output; and finally forming A modulated wireless power transmission signal as long as the valid level of the PWM signal, amplifying the wireless power transmission signals and then transmitting the amplified wireless power transmission signals;
S03: sending the amplified wireless power transmission signals to the corresponding receiving resonators by the corresponding transmitting resonators;
S04: receiving the wireless power transmission signals, generating power, and outputting the power to the corresponding R-LED module/G-LED module/B-LED module to realize power supply, by the receiving resonators; and
S05: extracting, by the wireless power transmission extraction modules, the wireless power transmission signals received by the receiving resonators, and rectifying and shaping the wireless power transmission signals into corresponding PWM signals, which are 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 change light.