Полнотекстовый поиск:
Где искать:
только в названии
только в тексте
слова в тексте
только заголовок

Рекомендуем ознакомиться

Остальные работы->Реферат
I once jumped off a two-story building just to prove how much I adored a girl. At the early age of eight, I have to admit that I was already a kid ful...полностью>>
Остальные работы->Реферат
If one were to study the roles of the lower classes in a society during the 18th and 19th centuries, one would notice that the concept of utility incr...полностью>>
Остальные работы->Реферат
Humbert Humbert. A delusional, sick, middle aged man obsessed with a self created love for pre-pubescent girls he has namely dubbed nymphets. Right? W...полностью>>
Остальные работы->Реферат
The theme of honor is one that permeates the novel. It is first introduced in the second chapter with respect to Tom Sawyer’s band: Tom believes that ...полностью>>

Главная > Реферат >Остальные работы

Сохрани ссылку в одной из сетей:


Liquid Crystal Display (LCD) stands for Liquid Crystal Display. Liquid crystals are transparent substances exhibiting both sold and liquid matter properties. Light passing through liquid crystal follows the alignment of the molecules that make them up. Applying electricity changes their molecular alignment thus changing the way light passes through them, and by putting these individual displays together you can create a display screen which is tremendously smaller then our CRT (Cathode Ray Tube) monitors.

There are two main principles applied in making LCD. The first principle consists of sandwiching liquid crystals between two finally grooved surfaces where the groves on one surface are perpendicular to the groves on the other. Since molecules on one surface are aligned north to south and the molecules on the other surface are aligned east to west. Then the molecules in between are forced into a twisted state of 90 degrees. Applying a voltage to the liquid crystal rearranges the molecules vertically allowing light to pass through. The second principle of the LCD relies on the properties of polarizing filters and light itself. Natural light waves are orientated at random angles. A polarized filter is simply a set of incredibly fine parallel lines. These lines act like a net, blocking all light waves apart from those orientated parallel to the lines. A second polarizing filter with lines arranged perpendicular (at 90 degrees) to the first would therefore totally block this already polarized light. Light would only pass through the second polarizes if its lines were exactly parallels with the first, or if the light itself had been twisted to match the second polarizes. The LCD consists of two polarizing filters with their lines arranged at 90 degrees to each other. When a voltage is applied the liquid crystals in-between twist and realign the lines vertically which then causes a block in the light. In other words if there is no voltage applied the light will be able to pass through, but if there is a voltage applied the light will be blocked. Controlling the different amounts of light passing through the liquid crystals allows the LCD to create color display. A LCD pixel consists of three different elements, each of which can create 64 shades of light.

With more and more people buying computers a need for better technology has aroused creating a market for efficient and more compact computers. One of the major components of a PC is its display (monitor). With the introduction of this new technology a display that is smaller but not equivalent in all aspect to the CRT monitor has been created.

One of the major differences between the CRT and the LCD are their physical size. A CRT consists of a cathode ray tube that requires a large amount of space as opposed to a LCD that is based on a very thin screen. This reason you can use the LCD many places where a CRT would be unfit (i.e. Laptops, small work area ). Having a small physical appearance doesn t mean a cut back on display size. Unlike CRT monitors, the diagonal measurement of a LCD is the same as its viewable area, so there s no loss of the traditional inch or so behind the monitor s faceplate or bezel. The combination makes any LCD a match for a CRT 2 to 3 inches larger. CRT monitors are capable of displaying unlimited amount of colors. In contrast to CRT monitors a LCD can display less then or equal to unlimited colors depending on the type of the LCD monitor you buy. CRT monitors are able to display multiple resolutions while a LCD will only work well in one resolution. Another issue with the LCD monitor is the viewing angel. A CRT screen can be looked at from a very wide angle, practically from the side, but a LCD monitor has a much smaller viewing angle, needed to be viewed more directly from the front. From the side, the image on a LCD screen can seem to disappear, or invert colors. As LCD technology becomes more advanced, these problems hopefully will be solved. The LCD is also an energy saver and does not emit harmfully radiation as the CRT monitors do.






Загрузить файл

Похожие страницы:

  1. Woodstock Essay Research Paper Woodstock Three days

    Реферат >> Остальные работы
    Woodstock Essay, Research Paper Woodstock: Three ... Fair. The Monterey Pop Festival held in Monterey, California, ... illegal drugs, specifically marijuana and LSD (”Woodstock ‘69: Three days ... drugs, specifically marijuana and LSD (”Woodstock ‘69: Three days ...
  2. Teenage Drug Use Essay Research Paper Drug

    Реферат >> Остальные работы
    ... Drug Use Essay, Research Paper Drug Abuse ... obtained from DEA’s Domestic Monitor Program, a retail heroin ... traditional Asian suppliers. LSD Availability. LSD in retail quantity ... 4.7 7.7 9.8 Inhalants 15.4 17.0 19.7 LSD 4.1 8.5 12.2 Heroin 2.0 2.3 2.3 Alcohol ...
  3. Sixties Essay Research Paper Aviv GrillThe SixtiesFrom

    Реферат >> Остальные работы
    Sixties Essay, Research Paper Aviv Grill The Sixties From ... meditation after hearing his teachings. LSD was one of the catalysts ... such as Hare Krishna ( the mantra of the Hare Krishna movement ... this until they started giving LSD to under-graduate students. They ...
  4. Output Devices Essay Research Paper Output devices

    Реферат >> Остальные работы
    Output Devices Essay, Research Paper Output devices Bit-mapped displays ... as co-processors. CRT and LCD Monitors: CRT (Cathode Ray ... It s also really heavy. The LCD monitors are liquid crystal display ... not bytes. I read that a monitor would take roughly 46 Megs ...
  5. Biological Warefare Essay Research Paper Imagine sitting

    Реферат >> Остальные работы
    Biological Warefare Essay, Research Paper Imagine sitting in a ... a few specific agents. Research is under way to expand ... Biological Detection System. Chemical Agent Monitor (CAM)-Level 3- This is ... microprocessor and shown on a LCD display. A field Alarm Module ...

Хочу больше похожих работ...

Generated in 0.0020389556884766