framebuffer 设备即帧缓冲设备（简写fb）提供了显示接口的抽象描述。他 同时代表着显示接口的存储区，应用程序通过定义好的函数访问，不需要知道底 层的任何操作。-framebuffer equipment that frame buffer (abbreviation fb) provided a display interface to the abstract depiction out. He also represented the storage and display