Double Resonant Transformer is a special transformer, which consists of two resonant circuits, namely the main circuit and the resonant circuit. The main circuit is composed of power supply, switching device and main Inductor, and the resonant circuit is composed of resonant capacitor and resonant inductance. When the switching device of the main circuit is turned off, the main inductor stores electric energy, and when the switching device is turned on, the main inductor releases electric energy, which is transmitted to the output terminal through the resonant circuit. Due to the existence of the resonant circuit, the double resonant transformer can realize high-efficiency, low-loss energy transfer, so it is widely used in high-frequency power supply, wireless charging and other fields. Double Resonant Transformer,Switching Power Transformer,Dual Output Switching Power Adapter,Trigger Transformer Huizhou Show-Grand Electronics Co., Ltd. , https://www.sgtransformer.com
On the day of the event, the Sky Tower changed the three primary colors of red, green and blue under the eyes of everyone, and formed white after synthesis. After the sky-light tower towering under the night was adorned with colors, cheers were heard from the crowd, such as “very good†and “really beautifulâ€. 
It is understood that the Skytree uses LED bulbs manufactured by Matsushita Co., Ltd. in 1995. Nobel Prize winner Akasaki began developing blue LEDs in 1973, working at Matsushita Electric Industrial Co.
A bystander from the Shinagawa area said: "I have been there many times. It is especially good after I click on the blue." He also frequently took photos to leave this beautiful moment.
It is reported that this special lighting event will last until the 18th of this month, from 8:15 to 11:00 local time every night. 
Japan held the "three primary colors of light" lighting event
December 12, according to Japanese media reports, the Tokyo Skytree in Sumida-ku, Tokyo, Japan, had a special lighting event on the evening of the 11th, congratulating the development of blue light-emitting diodes with the theme of "the three primary colors of light". University lifelong professor Akasaki and other three Japanese won the Nobel Prize in Physics.