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背投影彩电是在普通彩电的基础上研制开发出来的。从其工作原理上看,接收部分与普通彩电基本相同,最大的区别在于接收电视信号后的处理上,普通彩电收到视频信号后通过显像管直接显示到屏幕上,而背投影彩电接收到的信号,通过电路处理后用3只7英寸阴极射线管作为投影管,经三基色透镜过滤后分别产生红色(R)、绿色(G)和蓝色(B)三幅单色图像,经透镜投射在投影屏幕上,叠加起来合成一幅彩色图像。
Rear projection TV is developed on the basis of ordinary color TV. From its working principle, the receiving part is basically the same with the ordinary color TV, the biggest difference is that after receiving the TV signal processing, the ordinary color TV receives the video signal through the CRT display directly to the screen, and the rear projection color TV signal received , Processed by the circuit with three 7-inch cathode ray tube as a projection tube, the three primary color filter, respectively, after the red (R), green (G) and blue (B) three monochrome images projected by the lens Projection screen, superimposed to synthesize a color image.