Shenzhen Lianchengfa Technology Co., Ltd.

In 2023, the energetic and uniform "sea of fluorescent lights" at the Jay Chou Carnival World Tour Concert not only brought strong visual shock and emotional resonance to many fans, but also created a unique atmosphere and interactive effects on the scene.

So, how did the light sticks at Jay Chou's concert achieve this effect? In order to clarify the control principle behind the fluorescent sticks for field control, LCF made an in-depth dismantling and analysis using the fluorescent sticks from Jay Chou's Hong Kong concert. Let everyone see how the smart field control fluorescent sticks produced by LCF can realize the simultaneous control of tens of thousands of fluorescent sticks!

1. Appearance and disassembly process

The appearance has a personalized "love" design and exclusive LOGO. In addition to the unique personalized design, the light sticks of Jay Chou Hong Kong concert can also print LOGO, text and other information. The button of the light stick is located on the handle, and the switch of the power supply and the switching of different lighting effects can be controlled by the button.

In terms of power supply, LCF issued this field control light stick to supply power to the motherboard through three AAA batteries connected in series. If the battery needs to be replaced, it can be easily replaced by simply detaching the grip. The maximum luminescence time can reach 72 hours.

Considering that the application scene may face severe shaking or vibration, the positive and negative poles of the battery of this field-controlled fluorescent stick are directly connected with the main board by iron wires and fixed by screws.

2. Internal structure and field control principle

The internal circuit of LCF field control fluorescent stick is composed of two PCBs spliced in an L shape. Among them, the main board is the light control circuit of the fluorescent stick, which is mainly responsible for controlling the switching of the working state of the RGB light beads on the small splicing board to achieve various lighting effects such as coloring and flickering. The role of splicing small boards is to change the lighting direction of the RGB lamp beads.

It is not difficult to see from the circuit layout of the light stick and the eye-catching external antenna and infrared probe that this is a field-controlled light stick that supports remote control. At the same time, it supports multiple control methods such as group control for the whole field, area control for partitions, and point-to-point control. It can realize switching of various lighting effects according to different instructions by receiving external control signals.

In terms of circuit, LCF uses two chips to drive and control the circuit in this field-controlled fluorescent stick. By observing the connection between the chip and the device, it can be determined that the chip in the SOP package on the left is the main control chip of the circuit, and the chip in the QFN package on the right is an ultra-high frequency (UHF) radio frequency receiving chip. With the cooperation, it can provide two different working modes for the light stick, and the specific working principle is shown in the figure below.

When the ultra-high frequency (UHF) radio frequency receiving chip does not receive an external control signal, the main control chip will automatically control the light according to the preset program inside the chip. When the ultra-high frequency (UHF) radio frequency receiving chip receives an external control signal, the main control chip will process the external radio frequency control signal first, and quickly complete the switching of various lighting effects such as color and brightness.

At the same time, the ultra-high frequency (UHF) radio frequency receiving chip used in the circuit is also the key to achieving uniform control of light sticks in long-distance, complex stacking, and dense scenes such as concerts. Under normal circumstances, the working frequency of the radio frequency receiving chip is between 433~950MHz, which has the characteristics of high sensitivity and multi-tag anti-collision. With the support of antenna gain, the control signal can achieve coverage of tens of meters or even thousands of meters. Compared with ordinary WiFi and Bluetooth, this chip has more advantages in the distance and accuracy of signal reception.

The four triodes under the small splicing board are used to control the three colors of R (red), G (green), and B (blue) in the RGB lamp beads and the total power supply, and the color of the lamp beads in the fluorescent stick can be controlled by the triode. , and realize the effect of color gradient transition.

3. Conclusion

In short, the field-controlled light sticks used in the Jay Chou Carnival Concert, on the basis of supporting manual control by the audience, have added radio frequency control technology and wireless technology, and adopted acoustic, optical and wireless communication technologies. The radio frequency central control sends out different radio frequency signals, so that the fluorescent sticks in the audience can be perfectly coordinated with the stage lights. With the alternation of music rhythm and style, different lighting effects and visual impacts are presented, making the whole venue sometimes become a "" Purple sky", sometimes converging into a "pink ocean", sometimes shining into a "red sea of lights"... creating a music feast that integrates vision, hearing, touch and interaction.

The above is a summary of relevant knowledge about the realization of synchronous control of tens of thousands of light sticks in Jay Chou's concert compiled by the editor of LCF. I hope it will be helpful to everyone. At the same time, everyone is welcome to add or correct. Lianchengfa (LCF) is a national-level professional and new "little giant" enterprise, a LED display application and solution provider integrating "hardware + software + content + interaction". Friends who need to purchase field-controlled fluorescent sticks and LED displays can also directly contact LCF LED display manufacturer, a big country brand, trustworthy!