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亮度是显示器的一项非常重要的技术指标,也就是说,只有适当高的亮度,才能显示出鲜明的图像来。传统的CRT(显像管)显示器是依靠显像管内的电子枪发射的电子束碰击显示屏内侧的荧光粉来发光的,在显示器内通过磁场的干扰,电子束发生一定角度的偏转,扫描目标单元格的荧光粉显示出不同的色彩。而LCD(液晶显示)采用背光原理,即使用灯管作为背光光源,通过辅助光学膜组和液晶层对光线的控制来达到显示效果。与CRT显示器相比,LCD在亮度和画面上存在很大的差距。
Brightness is a very important indicator of the display, that is, only a suitable high brightness, can show a distinctive image. The traditional CRT (CRT) display relies on the electron beam emitted by the electron gun in the picture tube to collide with the phosphor inside the display screen to emit light. The magnetic field in the display interferes the electron beam to deflect at an angle and scans the target cell Phosphors show different colors. The LCD (liquid crystal display) uses the backlight principle, which uses the lamp as the backlight source, through the auxiliary optical film group and the liquid crystal layer to control the light to achieve the display. Compared with the CRT monitor, LCD in the brightness and the screen there is a big gap.