S+Ling

[|Selena Ling]

 LCD  **//Definition://** //Short for liquid crystal display; a method of displaying readings continuously, as on digital watches, portable computers, and calculators, using a liquid-crystal film, sealed between glass plates, that changes it optical properties when a voltage is applied//. (Source: [|dictionary.com])

Most people know this term by [|LCD TVs] or [|Computer Screens]. LC D displays utilize two sheets of polarizing material with a liquid crystal solution between them. An [|electric current] passed through the liquid causes the crystals to align so that light cannot pass through them. Each crystal, therefore, is like a shutter, either allowing light to pass through or blocking the light. Color LCD displays use two basic techniques for producing color, [|Passive Matrix] and [|Active Matrix], in which case passive matrix is the less expensive of the two technologies. The other technology active matrix, which produces color images that are as sharp as traditional computer displays. Recent passive-matrix displays using new [|CSTN] and [|DSTN] technologies produce sharp colors rivaling active-matrix displays.

We learned in school that there are three common states of matter: solid, liquid or gaseous. Solids act the way they do because their molecules always maintain their orientation and stay in the same position with respect to one another. The molecules in liquids are just the opposite: They can change their orientation and move anywhere in the liquid. But there are some substances that can exist in an odd state that is sort of like a liquid and sort of like a solid. When they are in this state, their molecules tend to maintain their orientation, like the molecules in a solid, but also move around to different positions, like the molecules in a liquid. This means that liquid crystals are neither a solid nor a liquid. That's how they ended up with their seemingly contradictory name.



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