Inventor-controlled Zeppelin Corporation has filed three Eastern District of Texas complaints, accusing BBK Electronics, OnePlus, OPPO, Realme, and Vivo Communication Technology (4:23-cv-00377), Xiaomi (4:23-cv-00378), and ZTE (4:23-cv-00381) of infringing a single patent generally related to a smartphone with a display that includes a particular layer of fluorescent material. Each defendant is accused of infringement through the provision of smartphones with certain Mediatek or Qualcomm chipsets, AMOLED displays with antennas alongside the display, and support for certain wireless protocols, including various Wi-Fi standards, 2G/3G/4G/5G connectivity, and Bluetooth 5.2, and certain features related to switching between Wi-Fi and cellular data and/or transferring data over Wi-Fi.