Description Chunghwa Picture Tubes (CPT) makes optoelectronic display components used in TFT-LCD (thin-film transistor liquid-crystal display) and CRT (cathode ray tube) applications. The company makes large, medium, and small display panels used in LCD televisions, monitors, notebooks, netbooks, and other products such as smartphones. Samsung Electronics and Sony are among its largest customers. CPT also partners with companies such as PC maker Compal Electronics. Chunghwa Picture Tubes, which was established in 1971, also makes color picture tubes and electron guns. The company has plants in China, Malaysia, and Taiwan.