Group 1: Industry Overview - The document lists various materials and components used in the LED and Micro LED industries, including substrates like silicon carbide and sapphire, as well as LED chips and driving ICs [1][2]. - Key players in the LED chip and component market include companies such as 日亚 (Nichia), 晶元光电 (Epistar), and 三安光电 (San'an Optoelectronics) [1][2]. Group 2: Material Types - The document highlights several types of materials essential for LED technology, such as polarizers, liquid crystal materials, and color filters [1][2]. - Specific materials mentioned include glass substrates, driving ICs, and various substrate materials like silicon carbide and sapphire [1][2]. Group 3: Micro LED Technology - Micro LED technology is noted for its applications in display technology, with companies like 三星 (Samsung), 友达光电 (AU Optronics), and 京东方 (BOE) involved in design and manufacturing [2]. - The document emphasizes the importance of packaging and testing in the Micro LED supply chain, indicating a growing focus on this technology [2].