电视,是利用电磁波或电缆传输活动图像信号的设备。首先需要用电视摄像机把图像明暗变化的光信号转换成电信号,传输机构又将电信号送到接收端,将电信号还原成光信号。系统可分为图像摄制、图像发送、图像接收几个部分。显然,我们平时所说的电视,一般指的是电视接收机。说到电视史话,就要回顾电视的起源,以及它的发展历程。 Television, is the use of electromagnetic waves or cables to transmit moving image signal equipment. First of all, you need to use a television camera to change the brightness of the image light signal into electrical signals, the transmission mechanism in turn send the electrical signal to the receiving end, the electrical signal is restored to optical signals. System can be divided into image capture, image transmission, image reception in several parts. Obviously, the television we usually talk about usually refers to the television receiver. When it comes to the history of television, we must recall the origin of television and its development.