Keystone Technology Co.,Ltd. engages in the research and development, production, and sale of polarizers, functional devices, signal connectors, liquid crystal modules, and display panel production materials. The company's products are used in LCD TVs, smart phones, tablets, laptops, and wearable devices. Its products also include special adhesive materials, which are used in rail transit, automobiles, and consumer electronics industries. The company was founded in 2002 and is based in Nanjing, China.