Shenzhen Sunnypol Optoelectronics Co., Ltd. manufactures and sells polarizers for liquid crystal displays and related applications in China. The company produces thin film transistor (TFT) polarizers, black and white polarizers, organic light emitting diode (OLED) polarizers, 3D glasses polarizers, transmissive sheets, reflective sheets, film super twisted nematic (FSTN) products; offers polarizers for mobile phones, tablet computers, computer displays, LCD televisions, anti-glare lenses, photographic equipment filters, polarized microscopes, special medical glasses, and other specialized uses; and provides protective films for flat panel displays. Founded in 2007 and headquartered at No. 246 Gongchang Road, Xinhu Street, Guangming District, Shenzhen, China, it operates primarily in the domestic market with minor overseas sales and employs 2,832 people. In December 2024, a subsidiary agreed to acquire Sumitomo Chemical's LCD polarizing film business in China, including 100% equity in Xuyou Electronic Materials (Wuxi) Co., Ltd. and Sumika Huabei Electronic Materials (Beijing) Co., Ltd., with assets to be operated by Liyou Optoelectronics outside consolidated statements; in 2025, it increased stakes in Hefei Sunnypol Optoelectronics Technology Co. and subscribed additional capital in Hubei Sunnypol Optoelectronics for RMB 366 million total, maintaining equity ratios while supporting expansion; the Hefei Phase II production line entered operation in early 2025.