电子专业英语lesson17-LCD

1、Unit Four Electric appliances How do Liquid Crystal Display TVs work? 液晶显示器 kristl 水晶；晶体的 Have you ever seen a snow crystal? Sometimes its possible to see them for a short moment when snow lands on your hand, but most of the time it melts before you get to see the beautiful hexagon-shaped (six-sided

2、) crystals. Crystals are made up of particles that are arranged in a regular pattern and usually come in solid form. For example, when snow melts, it turns into water and loses its crystal shape. melt 融化，溶解 heksgn 六角形，六边形 p:tikl 粒子，极小量 规则形状 Do you know that there are three states for most objects: s

3、olid, liquid and gas? Most things only come in these three forms. However, some material can remain in a state that is somewhat in between a solid and a liquid. In this state, the object is a liquid but still maintains the regular crystal-like arrangement. 排列，布置 The existence of this state has been

4、known for a very long time. In fact, there was a research article titled “the flowing crystal” that was published in 1889, over 100 years ago. It took many, many years of research and development to get liquid-crystal display TVs to the point that they are at now. 存在 If you put a nail in the middle

5、of two magnets, the edges of the nail will try to point towards each magnet. Similarly, crystals do not have a round shape but have a long narrow shape and when electricity is passed through a crystal, it tries to align itself in the direction of the electrical flow. neil 钉子；指甲 mgnit 磁铁，磁体 nru 狭窄的 l

6、ain 排列，使成一行 In a liquid crystal TV, many small compartments are left between two pieces of glass. Each of these compartments holds liquid crystals that are colored red, blue or green. Even if light is shined on the back of the screen, the screen remain black because the liquid crystals are not activ

7、e and block any light from passing through it. 间隔 ktiv 积极的；有源的 However, when electricity passes through a blue compartment, the liquid crystals in that compartment become active and allow light to pass through. Thats how a screen becomes blue (as shown in Fig.6-1). The way different colors are made

8、by combining the three primary colors of light (red, blue and green) is the same as the cathode ray tube TV, but in this case, the shutters of the liquid crystals block or let light pass and thats how different colors are made. CRT阴极射线管 t 百叶窗；快门 The space between the two sheets of glass that we talk

9、ed about before is only 5/1,000th of a millimeter. That is 1/10th the thickness of a piece of hair. Its amazing that people have invented a way to control the movement of liquid crystals in such a small space. 厚度 Whats more amazing is that people have developed a way to support these two pieces of g

10、lass between such a small space without letting it bend or sag. In fact, making a 30 TV of this size is a very, very difficult task. bend 弯曲 s 下垂，下沉 Another difficult part of the liquid crystal TV is that the screen looks dark from an angle because the technology is based upon a shutter closing or opening t