What is the principle behind the color change and movement of the light strip?
It controls the different current ratios of the three primary colors of red (R), green (G) and blue (B), and the LED emits light mixed into various forms. The principle of color is realized. Most RGB color changes are achieved by using a control IC to generate PWM (pulse width modulation technology) or by using an analog level signal to control the output current of each channel. This technology is available in many products, and PWM is universal. The technology has been known to the world for centuries, so there is no patent issue for general-purpose technology. Patents are only for specific new products and things that are not known to the world. Such things generally have the characteristics of invention, utility model, new appearance, etc. I am not very clear about the specific patents for products that use LEDs in stage lighting. You can check on the China Intellectual Property website to see if anyone has applied for a patent for the product you are researching