液晶显示器英文文献及翻译

鲫垂奉她噂酣亦 a告案当奉B 碰44森风器斓堕套解目 英文文献及翻译班级：4051090101 姓名：李元 学号：40510901030212864 LCD MonitorAt present, the market mainstream LCD(liquid crystal display) are divided into the following categories: TN (twisted array type), STN (super twisted array type), DSTN (Double Super Twisted array), HPA (high-performance rapid addressing or DSTN), TFT (thin-film field-effect transistor) and so on. The majority of small household electrical appliances are used in TN-type monochrome liquid crystal displays, Its principle is to have a liquid crystal filled with two out of the plane between the small trough. The two slots on the plane perpendicular to each other (intersection into a 90 ). As the light along the direction of the spread of the arrangement of elements, so when the light through the LCD reversed 90 . When the liquid crystal when a voltage increase, the vertical elements will be re-arranged so that light can be directed out, without any reverse. This LCD is by two vertical polarization filter constitutes, therefore, under normal circumstances should be to block all attempts to penetrate the light. If the DC-driven LCD, display units will cause permanent damage. In order to prevent irreversible damage to the electrochemical reaction LCD, plus all the characters in the paragraph on the voltage polarity must be reversed periodically so that the paragraph be added to the character of the average voltage is 0. In order to save single-chip I/O port line, using the method of multiplexing drive LCD.ST7920 LCD controller/driver IC can display alphabets, numbers, Chinese fonts and self-defined characters. It supports 3 kinds of bus interface, namely 8 bit/ 4bit and serial. All functions, including display RAM, character generator ROM, LCD display drivers and control circuits are all in a one-chip solution. With a minimum system configuration, a Chinese character display system can easily achieved.ST7920 includes character ROM with 8192 16X16 dots Chinese fonts and 126 16X8 dots half height alphanumerical fonts. Also for graphic display it supports 64x256 dots graphic display area (GDRAM) and 240 dots ICON RAM. ST7920 has built in 4 sets CGRAM providing software programmable 16X16 font. ST7920 has wide operating voltage (2.7V to 5.5 V) and low power consumption suitable for battery power portable device.It is easy to support multi languages application such as Chinese and English. Two consecutive bytes are used to specify one 16x16 character or two 8x16 half-height characters. Character codes are written into DDRAM and the corresponding fonts are mapped from CGROM or HCGROM to the display drivers. ST7920 provides RAM to support user-defined fonts. These user-defined fonts are displayed the same ways as CGROM fonts through writing character cod data to DDRAM.液晶显示器目前，市面主流LCD（液晶显示器）分成以下几大类：TN（扭曲阵列型）、STN（超 扭曲阵列型）、DSTN（双层超扭曲阵列）、HPA（高性能定址或快速DSTN）、TFT（薄 膜场效应晶体管）等。小家电大多数采用的是TN型单色液晶显示器，它的原理是 把液晶灌入两个列有细槽的平面之间。这两个平面上的槽互相垂直（相交成 90 ）。由于光线顺着分子的排列方向传播，所以光线经过液晶时也被扭转90。当 液晶上加一个电压时，分子便会重新垂直排列，使光线能直射出去，而不发生任何扭 转LCD正是由这样两个相互垂直的极化滤光器构成的,所以在正常情况下应该阻断 所有试图穿透的光线。如果用直流驱动LCD,将会引起显示单元永久性的损坏。为了 防止不可逆转的电化学反应使LCD损坏,加在所有字符段上的电压必须周期性翻转 极性，以使加在字符段上的平均电压为0。为了节约单片机I/O 口线,采用多路复用 的方法驱动LCD。ST7920 LCD控制器/驱动器IC可以显示字母，数字，中文字体和自定义字 符。它支持三种总线接口，即8位/4位和串行。所有功能包括显示RAM，液 晶显示驱动器和控制电路都在一个芯片解决方案。是一个最低系统配置，汉字显 示系统可以轻松实现。ST7920包括自带的8192个16X16点阵中文字体和126个16X8点半高字 母数字混合字体。也为图形显示它支持64x256点阵图形显示领域（GDRAM） 和240点图标内存。ST7920内置4套CGRAM提供软件可编程16X16字型。 ST7920有较宽的工作电压（2.7V至5.5V）和低功率消耗适合电池供电的便携 式设备。它很容易支持多语言的应用程序，如中文和英文。两个连续字节用于指定一 个或两个16x16字符8x16半高字符。字符代码写入DDRAM和相应的字体映射 从CGROM或HCGROM的显示驱动程序。