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投影机自问世以来发展至今,已形成了3大系列:CRT 管(三枪)投影机,LCD(液晶)投影机和 DLP(数字光处理)投影机。现分别简介于下:CRT(三枪)投影机CRT(Cathode Ray Tube)即阴极射线管。CRT 投影机是由光学系统和CRT 管组成。一般有红(R)、绿(G)、蓝(B)3个 CRT 管,所以也叫作三枪投影机。其成像技术是将信号源分成红、绿、蓝3种色源,通过用电子束射在 R、G、B 三个 CRT 管上扫描成像,然后经过光学透镜放大,在大屏幕上会聚成彩色图像。CRT 投影机的优点是图像色彩丰富,还原性好,分辨率高,具有几何失真调整功能。但是,CRT 三枪投影机的亮度低,体积大,不易搬动,而且操作复杂。
Projector has been developed since the advent of the three major series has been formed: CRT tube (three shots) projector, LCD (liquid crystal) projector and DLP (digital light processing) projectors. Now briefed on the following: CRT (three shots) Projector CRT (Cathode Ray Tube) that is cathode ray tube. CRT projector is composed of optical system and CRT tube. There are generally three red (R), green (G), blue (B) CRT tubes, so it is also called a three-shot projector. The imaging technology is the signal source is divided into red, green and blue three kinds of color, through the use of electron beam in the R, G, B three CRT scan imaging, and then through the optical lens to zoom in the big screen will converge into color image. CRT projector has the advantage of rich color images, good reducibility, high resolution, with geometric distortion adjustment. However, CRT three shot projector brightness is low, bulky, difficult to move, and the operation is complicated.