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在英国曼彻斯特机场新建的大厅里出现了一种大屏文字数字显示装置,整个显示板的尺寸是12×2米,显示板安装在离地6米的高处,可以看得很清楚。 这种显示装置中的显示屏由四层结构组成,三层塑料,一层玻璃。紧贴玻璃的一层塑料是不透明的,上面有许多圆孔,排成显示用的象元矩阵。中间一层塑料上面有许多肾形小孔,也可以说是两个连起来的圆孔(见图),其中一个正对着不透明塑料上的圆孔。在每个肾形孔里有一个小圆铁片,可以自由地从肾形孔的一端移至另一端,小圆片的大小正好把孔的一端填满,因此可以阻
A large-screen alphanumeric display appeared in a new lobby at the Manchester Airport in the UK. The entire display panel measures 12 by 2 meters and the display panel is mounted 6 meters above the ground for clarity. The display in this display consists of a four-layer structure, three layers of plastic, and one layer of glass. A layer of plastic against the glass is opaque, with many holes in it that line up the pixel matrix for display. The middle layer of plastic has many kidney-shaped holes, or two circular holes (see photo), one of which faces the hole in the opaque plastic. In each kidney-shaped hole there is a small round iron plate that is free to move from one end of the kidney-shaped hole to the other, the size of which is exactly the size of one end of the hole,