瑞丰光电：主营业务为LED封装技术的研发和LED封装产品制造、销售

Core Viewpoint - The company, Ruifeng Optoelectronics, focuses on the research and development of LED packaging technology and the manufacturing and sales of LED packaging products, providing comprehensive solutions for LED light sources [2] Group 1: Business Overview - The main business of the company includes R&D and manufacturing of LED packaging products, offering services from design to integration of LED light source solutions [2] - The company's products, including CHIP LED and infrared products, are applicable in various fields such as home appliances, industrial control, mobile phones, wearable devices, VR, security, machine vision, drone ranging, and automotive intelligent driving assistance [2] Group 2: Product Applications - The company's LED products are utilized in applications like supplementary lighting, transmission and reception, ambient light sensing, proximity sensing, and distance sensing [2]