液晶显示的背光源系统中，普遍使用冷阴极荧光灯。管状荧光灯分直射型和侧射型，前者发光率较高，后者薄而轻且发光的均匀性好。近期研制成功的一种采用空心冷阴极和高压脉冲驱动的平面型发光荧光灯，经过多次改进，其发光均匀性远远超过管状结构，已达到５％以下，非常适合于大型化的液晶显示。今后的目标是进一步实现高亮度、低功耗和轻量化，且使之适应批量生产。 LCD backlight system, the common use of cold cathode fluorescent lamps. Tubular fluorescent lamp is divided into direct type and side type, the former high luminous efficiency, which is thin and light and good light uniformity. The recent successful development of a hollow cold cathode and high voltage pulse driven flat fluorescent fluorescent lamp, after many improvements, its luminous uniformity far exceeds the tubular structure, has reached 5%, is ideal for large-scale liquid crystal display. The future goal is to further achieve high brightness, low power consumption and light weight, and to adapt to mass production.