液晶显示技术是20世纪的一项伟大发明,对于电子产品的普及起到了重要作用。本文简单介绍了液晶显示技术的驱动原理以及静态驱动和动态驱动方式两种LCD驱动方法的实现方法和特点。同时,介绍了一种点阵式驱动电路的图像优化的方法。并对两种驱动方式各自的优缺点和适用范围进行了比较和分析。

Using the differential technology to transmit video signal,developed in recent years is a new technology.This paper describes how to use the VGA analog display signal is converted into a differential signal,using the differential signal to achieve high resolu-tion VGA signal transmission,and in the actual project application to solve the key technique,describes in detail the high resolution VGA simulation differential signal transmission application.

The problem of output feedback guaranteed cost control for a class of networked control systems with uncertain time-delay is studied.The uncertain time-delay is modeled as coefficient matrix uncertainties of system state equation,and a state observer is used to reconfigurate system states under output feedback condition.Moreover,the output feedback guaranteed cost control problem for NCSs(Networked Control Systems) is translated to a robust guaranteed cost control problem for an output feedback uncertain discrete system.Lyapunov theory and matrix inequalities approach are used to obtain the design method of output feedback guaranteed cost control for NCS.Simulation example shows the validity of the proposed method.

In embedded PC applications,a keyboard as an interactive devices often adopt simple structure,less the matrix keyboard keys.Although the standard keyboard can be directly connected with embedded PC's PS /2 interface connector,bulky and more buttons can not meet the actual requirements.This paper presents a AT89C2051 MCU to realize a standard PS /2 keyboard interface of the matrix,and gives the circuit schematic and C51 source program.