An emission control driver that applies an emission control signal for controlling an emission operation of a pixel circuit is provided. The meter value is decreased by the packet length when a packet in enqueued or dropped. An underfill is dispensed along the edge of the chip The device is then sent into the reflow furnace to complete the underfilling, solder reflowing and underfill curing. While these operations are being performed, other operations for verifying the prediction are performed.