1.屏显电路:彩色电视机屏显电路能以文字和符号在屏幕上显示出各种控制功能。屏显电路由字符振荡电路、屏显位置定位电路、屏显信号及亮度消隐信号电路组成。屏幕显示的内容在制造微处理器时已固化在集成电路内部的只读存储器ROM中,需要屏幕显示时,微处理器在确定的存储单元中调出显示字符,进行 1. Screen display circuit: color TV screen display circuit to text and symbols on the screen shows a variety of control functions. Screen display circuit by the character oscillation circuit, screen display position positioning circuit, screen display signal and brightness blanking signal circuit. The contents of the screen display are solidified in the ROM of the integrated circuit when the microprocessor is manufactured. When an on-screen display is needed, the microprocessor calls up the displayed characters in the determined memory unit and performs