How to work LCD monitor
Liquid Crystal Display (LCD): A digital display technology that produces an image on a flat surface (flat) with a ray in the liquid crystals and color filters.
- Only eat a little space, low power, and heat generated less than CRT monitors (Cathode Ray Tube).
- There is no flicker and very low the wink so well regarded for hours.
- For the same size, the price more expensive than CRT monitors.
Has long been used as a screen for laptop, desktop computer has also started using the monitor using this technology LCD. LCD has many advantages compared to CRT monitors. They were able to show a clear text and no flicker, which means reducing eye fatigue. Because the thickness of less than 10 inches (± 25 cm), LCD monitor to take the desktop space that is smaller than CRT monitors.
LCD weakness : quality color LCD screen can not be compared with a CRT monitor, and the price is not expensive to make it affordable for most people. Found in 1888 years, liquid crystal is a liquid chemical molecular can be arranged in such a way if given the electric field-like molecule-molecule metal when magnetic fields are given. When set properly, the rays can pass these liquid crystals.
even desktop or laptop screen, an LCD display consists of many layers, the term is a ’sandwich’. A flourescent-ray source, or backlight, is the bottom layer. Rays will pass this first filter of the two filters (polarizing). Rays that have been polarize then pass a layer that contains thousands of spot even with liquid crystal in a small container, called a cell. Each cell, also equal formed line on the screen; one or more cell will form one pixel (the size of the smallest point on a screen). Electrical source in the form a round LCD elektric area will be vibrate of crystals molecular, which set of rays through a second layer on the filter and through the polarize. On a monochrome LCD screen, as on a PalmPilot or a digital watch, so how it works: open the cover, and the work done. But on the LCD color, such as on a PC laptop, do they work more complex.
On a color LCD panel, each pixel consists of three liquid crystal cell. Each cell has a third filter red, green, or blue (red-green-blue/RGB). Rays passing through the filtered cell that will create the colors you see on the LCD. Sometimes the system that sends electrical currents in the cell one or more does not run well; incident cause of the dark pixel and “damaged”.
Almost all modern-color LCD screen as a laptop or desktop monitor, using a thin film transistor (thin-film transistor / TFT), which is known as active matrix, for each of the cell. TFT LCD create the image of the more obvious, clear and bright. LCD technology tools are very slow, less efficient, and the contras is very low. Matrix of technologies, passive-matrix, is able to display the text but leave a clear reflection if the display changes quickly, so not optimal for video. Currently, most of the black-white palmtop, pager, mobile phone and use the passive-matrix LCD.
LCD set because each pixel separately, they can display the text that more clearly than the CRT, which is, concentrated with time is not correct, will obscure direction a pixels (which describes the image on the screen). But the high-contrast LCD that can cause problems especially if you want to display a graphical image. CRT will be soft periphery of the image graphic, as well as in the text, and even though it does not make the text legible on a high resolution, softening (softening) can mix and cover the serration, for example in the photo, the result is better than LCD display. LCD and also has only one resolution “natural”, that is limited on the number of pixels that are placed on the screen. If you want to increase the resolution, eg 800 × 600 from a 1024 × 768, for the LCD screen you must use software for do it, which can only work on a specific resolution.
Such as CRT, LCD for the desktop is also made to receive the analog signal-a wave-shaped, with different forms of credit in the binary-digital signal from your PC. This is because most of the graphics card that is still outstanding at this time converting visual information from digital form into analog before display on the screen. But the LCD to process the digital information, so that when the analog data from the graphics card to reach the standard LCD monitor, a monitor is necessary to convert back into a digital form. They can cause oscillation or shadows on the screen. LCD using the latest digital graphics card equipped with special digital connector for maintain clarity appearance.
Missing from the LCD : of course, every notebook computer has an LCD. Laptops early generation using passive-matrix screen black and white 8-inch (diagonal). But with the development of the LCD to the active-matrix, the size of screen up. Currently, most LCD-based panels using TFT, which can give the look that bright, clear and in large screen sizes. But the size of a laptop itself can not be raised. You certainly will not find a laptop with a screen size of LCD is larger than 15.1-inches. Screen that is larger than that typically used in LCD desktop.
Many of the major PC vendors began offering as an option on the LCD in the new desktop PC. Gateway, Dell, NEC, and Acer, all flat panel offers this as part of the flat system or inexpensive desktop PC all-in-one for SOHO. In order for the package price does not rebound, the vendor typically uses a slightly older components, or a little cheaper on the system, and prefer the aesthetic aspect of the flat panel that, like furniture from the era of Star Trek .
ViewSonic, NEC, and other vendors offering LCD monitors with a desktop size of 14 inches (it costs about U.S. $ 600) to 18 inches (usually labeled with the price more than U.S. $ 3500). As a note, vendors determine the size of wide screen LCD screen that’s visible and not the tube size, as in the CRT monitor, so the area is visible on the LCD screen 15 together with the on-screen 17-inch CRT monitor. Some of the LCD monitor stand-alone is designed so that the screen can adjust based on it oriented, landscape or portrait. Some of them were even equipped with a USB hub and a screen protector. All that, of course, add extra cost to the price label.
Up to now, the market share of LCD 2 percent of total monitor sales, according to analysts from the Stanford Resources, San Jose, California. That number may change if the price came down. LCD 15 inches, with the price range of U.S. $ 800 to U.S. $ 1200, is the type most in demand with 75 percent in the LCD market. As a comparison, the price of 17-inch CRT monitor at around U.S. $ 200 to U.S. $ 350. The analyst expects the price 15-inch LCD can be cheaper this year, with the reduced cost of assembly.
When you have to choose between analog or digital type, you may have to sacrifice quality for economic reasons. Because the model must be to convert an analog data twice, then there may be a problem when rendering. LCD digital afford better do its work, but require a special graphics adapter with a digital interface. So, the price of LCD digital more expensive than analog models, as a whole. And remember, you must purchase the adapter separately.
Fortunately, the standard digital interface that is held between the Video Electronic Association (the body has long been a standard video) that brings the standard Digital Flat Panel with Digital Display Working Group (consisting of several vendors such as Intel, Compaq, and NEC), which comes with the standard Digital Visual Interface, has ended with the DVI as the winner. Broad support of the vendor against all this means is DVI LCD will use the latest digital DVI standard, including the graphics card with a digital connector. So if you want to buy computer choose LCD or CRT monitor ? Hope it’s usefull.
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