真空荧光显示器是一种和阴极射线管相似的显示设备,真空荧光管的主要器件是一个带有栅极的电子管,阴极射出的电子在栅极的吸引下加速射向阳极,撞击到阳极上涂覆的荧光粉后发出可见光。通过调节栅极的电压可以改变真空荧光管的亮度,大量的真空荧光管排列起来就可组成真空荧光显示器,每个荧光管显示一个像素。在录放影机、DVD、微波炉等家电以及早期电子计算器的显示板,和汽车的仪表板上都可以看到真空荧光显示器。[1]
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