Everything About LCD Monitor

HiColor Technology has been successfully developed by AUO using CCFL backlights to increase color saturation by 33% as compared to conventional LCD screens. Following the latest development trend in LEDs, AUO developed HiColor using RGB LED backlights, which can reach 105% NTSC while providing natural performance of red, green and blue lights and enabling rich, bright, and vivid display colors.

AUO also developed several techniques to improve LED backlights’ image performance. For instance, Color Management eliminates artificial color caused by inconsistencies between the signal and the light source. The intensity of the RGB LEDs can be changed using the Flexible Color Temperature Setting without losing luminance. Other advantages of HiColor Technology includes instant light, mercury and lead free, low temperature start, faster response time, and vibration and shock safe.

Color washout occurs when the R, G, and B transmittances change because the viewing angles are out of harmony. Specific colors that the human eye can recognize appear pale when the viewing angles increase. This is one of the things that LCD panels need to improve on. AUO Advanced MVA technology or AUO AMVA can increase the viewing angle up to 178 degrees, gives better image quality when viewed from oblique angles and improves color washout. The contrast ratio also dramatically increases, especially when the image is dim. The high contrast technology gives higher transmittance while retaining the optical properties of wide viewing angles and low color washout.

The layer of liquid crystal between CF substrates and TFT substrates rotates into different angles depending on the charge applied to every pixel. When a million pixels receive different charges, the panel obtains a million LC angles in the area. The LC’s standing angle within millions of pixels needs to be controlled because the LC’s optic rotation nature needs to control the amount of light that passes through the LCD panel. Light from back light unit moves from the TFT panel through the ITO electrode, which is turned by Liquid Crystal before it reaches the LCD panel on the top.

The LC angle controls the amount of light that gets rotated. Light that does not get rotated by the LC gets absorbed by the top polarizer. The function of the polarizer is to filter most of the light and allow light traveling at the right direction to pass through.

TFT-LCD is an abbreviation of thin film transistor liquid crystal display. This technology first came about in the 1960’s and continued to undergo substantial modifications until it began to be used for mass-production of laptops and notebook computers in 1991.

A TFT-LCD panel makes use of liquid crystals to control the amount of light that passes through. A basic LCD panel involves two glass panels with a layer of liquid crystal in between. The front glass panel contains a color filter while the back glass panel has transistors attached to it. The liquid crystal gets bent when voltage is applied through the transistors, and light is allowed to pass through and form a pixel. LCD panels contain a light source behind it. The color filter in the front glass panel gives the pixels their own color, and a combination of the pixels forms the image on the screen.

Save your eyes with reduced glare of LCD. An LCD monitor has uniform screen brightness and there is no flicker, you would not experience glare and eye strain compared to a CRT. The high definition LCD technology is excellent for everything you do, whether you’re working on graphics or spreadsheets, playing games, watching video or just doing word processing.

Save your back as you work on your laptop or computer. The 19-inch CRT weighs about 46 pounds while LCD only weighs 12 pounds. When it’s time to move it, your back will thank you.

Save enough space on your desk with your sleek LCD. The new ultra high efficiency LCD monitor is better in so many ways, it’s bright, has a colorful display, and perfect for any application. The small size and light weight equipment will work just about anywhere you go.

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You can save energy using a more efficient monitor…the LCD.

Choosing an ultra high efficiency LCD monitor can reduce your energy usage, even over other LCD monitors. The ultra high efficiency monitors use up to 80% less energy than an average CRT monitor.

You can actually save 520 kWh/year by switching from your old CRT to ultra high efficiency LCD monitor or the qualifying monitor. You can even save 360 kWh/year by switching from a standard LCD monitor to ultra high efficiency LCD monitor. Qualifying monitors can also eliminate about 1000 lbs. of CO2 emissions over the lifespan of the monitor

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Passive Display (TN, STN)
Passive matrix is the term when it used for computer screens and passive display when it used for small readouts, all the active electronics (transistors) are outside of the display screen. Passive displays have improved but do not provide a wide viewing angle. Types of passive displays are Twisted Nematic (TN with a 90º twist), Supertwisted Nematic (STN with a 180-270º twist) and Dual Scan STN.

Active Display (TFT)
Widely used for all LCD applications today (laptop and desktop computers, TVs, etc.). Known as active matrix displays, a transistor is used to control each subpixel on the screen to produce high definition resolutions. The active matrix provides a sharp, clear image with good contrast and eliminates submarining. Fabrication costs were originally higher than the passive matrix, which caused both types to be used in the early days of laptop flat panels. Active matrix displays use a 90º (TN) twist and known as thin film transistor-LCD (TFT LCD).

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By: Govy

Liquid Crystal Display(LCD) is technology that uses rod-shaped molecules (liquid crystals) that flow like liquid and bend light. Unenergized, the crystals direct light through two polarizing filters, allowing a natural background color to show but when it is energized, filters redirect the light to be absorbed in one of the polarizers, causing the dark appearance of crossed polarizers to show. The more the molecules are twisted, it produces a better contrast and viewing angle.

Since less power is needed to move molecules than to energize a light-emitting device, LCDs replaced the light-emitting diodes (LEDs) in digital watches in the 1970s. Eventually, LCDs were used for monochrome displays and still are and in the 1990s, color LCD screens caused sales of laptop computers to explode. In 2003 to date, more LCD monitors were being sold for desktop computers than the bulky and space consuming CRTs.

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By Govy

An LCD that can show colors has three subpixels, namely: red, green and blue color filters. This create each color pixel for the LCD.

Through careful control and variation of the voltage used, the intensity of each subpixel can range over 256 shades. Combining the subpixels can produce a palette of 16.8 million colors (256 shades of red x 256 shades of green x 256 shades of blue), these color displays take an enormous number of transistors. For example, for a typical laptop computer, it has a resolution up to 1,024×768. If we multiply 1,024 columns by 768 rows by 3 subpixels, we get 2,359,296 transistors etched onto the glass to produce different colors!

If there is a problem with any of these transistors, it creates a “bad pixel” on the display and definitely produces fuzzy images.

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By: Govy

Over a billion PCs are being sold every year with a visual interface each human user. LCD monitors have the following features: light weight, thin shape, flat screens, energy saving, emissions free, and digital video PC display.

The compact configuration of an LCD monitor makes it convenient for the users to enjoy their PC entertainment choices. Unlike the bulky CRT, the LCD monitor tales less space and fits comfortably on your desk.

You can watch DVD movies, enjoy streaming videos or play games. It’s all great fun! So, whether you’re at work or play – during the night or the day – an LCD monitor with its delicious images, compact construction and stylish design is the perfect choice.

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