四字16*16点阵电子屏字符显示器 显示字用查表法，不占内存，用四个16*16共阳LED点阵显示， 效果：向上滚动显示字，每次四个，重复循环-Words, 16* 16 dot matrix electronics display screen characters in the word look-up table method used does not account for memory, with a total of four 16* 16 dot matrix LED d