Apple might be planning to unveil an upgraded Apple TV or similar television-related product at its upcoming September 10 iPhone event, according to global trade intelligence platform Panjiva (via GigaOM). The company has shared three bills of lading from the U.S. Department of Homeland Security that show Apple accepted three shipments labeled as "Set Top Boxes" during the month of August from one of its suppliers, BYD Precision Manufacture in Shenzhen, China.On August 25th, Apple received a shipment described as "Set Top Box with Communication Function" from BYD Precision Manufacture in Shenzhen, China. On August 18th, Apple received another shipment, again from BYD, described as "Set Top Boxes."