1. Huina Technology: Headquartered in Shenzhen, China, Huina Technology is one of the leading LED display solution providers in the world, providing various indoor and outdoor LED display products.

2. Samsung: a multinational electronics company from South Korea, providing various LED display products, including televisions, monitors and LED video walls.

3.LG: A multinational electronics company, also from South Korea, provides LED TVs, large-screen displays and other products. Various innovative LED display technologies have been introduced.

4. Sony: a Japanese multinational electronics company, which provides high-quality LED TV and display products and is famous for its image processing technology and image quality performance.

5. Crown: China LED display manufacturer, with high global market share. Focus on indoor and outdoor LED display solutions, covering products of different sizes and uses. LED screen is a display technology, which uses light emitting diode (LED) as light source, combined with control circuit and pixel lattice arrangement, can convert electrical signals into visible light signals, thus displaying images, characters, videos and other contents.