屏幕保护： 若无按键并且超过１０秒则切换到屏幕保护模式——１０２４×７６８×８位的ＶＥＳＡ模式并动态显示图片 若有按键发生切换回原来的进程-Screen Saver: If there are no buttons, and more than 10 seconds to switch to the screen saver mode- 10247×768 VESA mode and dynamic display pictures if key switch back to the o