How does it work? | LSD-display
Source:
Liquid crystals were discovered in 1888 by Austrian scientist Friedrich Reinitzer, and in 1927, a Russian physicist Vsevolod Frederiks was discovered crossing, was named after him and is now widely used in conventional LCD displays. In the 1970-ies the company RCA was first introduced LCD monochrome screen. Liquid crystal displays have been used in electronic watches, calculators, instruments. Then began to appear, dot matrix displays, reproducing black-and-white image. In 1987, the company developed the first Sharp color LCD display diagonal of 3 inches. How does the LCD-display — this was in today's issue!
LCD or liquid crystal display based on polarization of the light flux. Liquid crystals "screened" light, passing only certain waves of the light beam with the appropriate polarization axis, and remaining opaque to all other wavelengths. The change of the polarization vector is a liquid crystal depending on the applied electric field to them. In other words, with the help of electricity you can change the orientation of the molecules of the crystals and thus ensure the creation of the image.
Almost every LCD display has an active matrix of transistors, by which an image is formed, a layer of liquid crystals with optical filters selectively transmits light, and the illumination system (usually led). The latter is necessary to display color images. LCD display has multiple layers, the main of which are two glass panels that contain a thin layer of liquid crystals between them. The panels are grooves, which direct the crystals, giving them their orientation. The grooves are arranged parallel on every panel, but perpendicular between two panels. Coming into contact with the grooves, the molecules in liquid crystals are oriented equally in all cells.
Directly to the screen of the LCD display is an array of tiny segments — pixels. Each pixel has three transistors, each responsible for one of the three colors, and the capacitor maintains the desired tension. By combining the three primary colors for each pixel of the screen, you can get any color.
The Most common nowadays are the LCD TFT displays, active matrix, which uses thin film transparent transistors. The number of transistors in such displays can reach several hundred thousand.
The advantages of LCD displays is relatively low cost, excellent focusing, very high image clarity and brightness. And the lack of color registration error and screen flickering. The fact that such displays do not use electron beam draws every line on the screen. Of the drawbacks of LCD — the emergence of dead pixels due to the combustion of the transistors, a small number of shades of color, uneven brightness of the image (often the light at the edge of time) and the relatively small viewing angle.
Recommended
Mystery of the Sargasso sea, and why there were dead ships
At the time, in the Sargasso sea lost a lot of ships. Almost all mystical place, about which people say, giving them a mysterious halo, are on the water. When ”ends”, the disappearances do seem very strange and inexplicable. One of the places that ar...
An air leak site has been found on the ISS. What's next?
Air leak occurs in Russian station module Inside the International Space Station live astronauts from different countries and all of them need oxygen. The air needed for the life of the crew is produced by special equipment, but the tightness of the ...
Why can thinking about death make life happier?
Awareness of one's own mortality can be a liberating and awakening experience How do you feel about the idea of death? How often do you think about it and what emotions do you feel? Many of us have been pondering these questions lately. The pandemic ...
Related News
Nobel laureate in Economics: bitcoin is just another bubble
Robert Shiller is an American economist, has published a number of scientific papers and books on Economics. In 2013, Schiller was the winner of the Nobel prize in Economics. At the moment a scientist teaches the subject at Yale U...
Chess puzzles is worth a million dollars
One of the most ancient Board games, chess is not only developing tactical thinking, but also to improve other useful skills. For example, there are many logical brainteasers on the arrangement of pieces on a chess Board in a cert...
the History of NFC technology takes its beginning in 1983. Then electrical engineer Charles Walton received a patent for "portable radio frequency emitter-ID". Almost 20 years later, in March 2004, Nokia, Sony and Royal Philips El...
At Kaspersky Lab has predicted the future of Moscow
In anticipation of the 870 anniversary of the capital of Russia on the website of Kaspersky Lab there is a very interesting forecast for the Moscow of the future. In the framework of the project «Earth 2050» the experts ...
The head of the company Samsung will spend five years in prison
we have Previously that the billionaire and Vice-President of the South Korean company Samsung Electronics Li Geen was arrested on suspicion of giving multimillion-dollar bribes to government officials. If Jean is the son of the C...
First Bank cards appeared in America in the late 19th century. They were made of cardboard and have served only to confirm the creditworthiness of the owner outside the Bank. In 1914, Western Union issued the first card with a fix...
"Smart" sticker will indicate spoiled food
we All used to trust (or not trust) labels on food products indicating the expiration date. But unscrupulous sellers are finding ways around this system in order not to lose benefits and to sell to the buyer outstanding product. P...
How does it work? | Money counter
Welcome to Hi-News.ru! First paper money appeared in China in 910 year — they replaced the metal bars. For a long time, the counting of bills can be done only manually, and only in 1908 in an attempt to optimize this process...
How does it work? | Banknote detector
to Manufacture counterfeit money began in the days of Ancient Egypt. With the advent of banknotes, the task of the counterfeiters has been simplified, and States have begun to develop special protections that would be difficult to...
How does it work? | Facial recognition system
Man is able to recognize faces of other people due to the area of the brain on the border of the occipital and temporal lobe fusiform gyrus. People are learning to recognize faces from birth and at four months can clearly distingu...
a prototype of the first ATM machine was invented by the American scientist Luther Simpana in 1939. The device gave out cash, but could not deduct them from the account: the device was not associated with the Bank. In 1967 in Lond...
Astronomers have caught a strange radio signal from the stars is 11 light years from us
Astronomers reported the discovery of "strange signals" going in the direction from the small, dim stars located at about 11 light years from Earth. Signals were received on may 12. They were caught, the Arecibo Observatory's gian...
How does it work? | Speech synthesis
we talked about speech recognition, today we will discuss the inverse problem. So how does speech synthesis, or, in other words, converting arbitrary text to voice — this was in today's issue! http://www.youtube.com/watch?v...
How does it work? | Speech recognition
the First device for speech recognition appeared in 1952, it was able to understand spoken human figures. 40 years later, the first commercial software for recognizing human speech. They were designed for people who, because of ph...
How does it work? | Iris scanner
the Technology of scanning an iris of the eye was first proposed in 1936 by ophthalmologist Frank Bursh. He said that the iris of each person is unique. The probability of coincidence is about 10 to the minus 78 degrees, which is ...
How does it work? | Fingerprint scanner
identification of the fingerprint — one of the most reliable ways to confirm the identity of the person. On the accuracy of this method is second only to the retinal scan and DNA analysis. Fingerprint — it's nothing li...
How does it work? | Computer mouse
History of computer mouse originates 9 December 1968, when it was presented at the exhibition of interactive devices in California. The patent for this gadget got Doug Engelbart 2 years later. The first computer, the set which inc...
the History of computer keyboards goes back more than 150 years. The prototype of the modern keyboard was a typewriter, which appeared in the mid-nineteenth century. First, the keys with letters placed alphabetically. However, ove...
Touch panel, or another touchpad, was invented in 1988 by George Gerpheide. Then, Apple has licensed the project and, since 1994, began to use in the PowerBook laptops. Since the touchpad is the most common control device a laptop...
In today's issue of the scientific-educational programs «How does it work?» we'll talk about the SSD. Pleasant viewing! http://www.youtube.com/watch?v=tg9qRyCKbN4...
Comments (0)
This article has no comment, be the first!