我写的一个控件，可以通过串口发送数据到LED显示屏，支持中午，支持bmp图形，广大排队叫号软件显示屏程序开发者可以借鉴！-I wrote a control that can send data via serial port to the LED display, support at noon, support bmp graphics, the majority of the software line called number display application developer