082 - What is Computer Monitor

A Monitor is an electronic visual display for computers. The monitor displays the computer's user interface and open programs, allowing the user to interact with the computer, using the keyboard and mouse. The two types of monitor are: Liquid Crystal Display (LCD) monitor and Cathode Ray Tube (CRT) monitor.

A monitors is a primary visual units that allow you to use a desktop computer. Over the years, bulky monitors have been replaced by slim and feature-rich monitors, some of which may even have a touchscreen. A monitor, technically termed as a visual display unit, can be plainly described as an electronic device that transmits information from the computer onto a screen, thereby acting as an interface and connecting the viewer with the computer. At present, computer monitors are available in a variety of shapes, designs, and colors.

The original name of monitor is Visual Display Unit (VDU) and also comes with many types such as:

CRT: Cathode Ray Tube • These are heavy, use a lot of desk space and electricity. It is the oldest technology used by monitors and is based on the cathode ray tube technology that was developed for television This type of monitor is no longer popular.

LCD: liquid crystal display • Works by adjusting the amount of light blocked. Usually has a backlight but might not (clocks, calculators, Nintendo Gameboy). The green-black ones can be very cheap and are a mature technology. Response time can be slow.

LCD monitor is the most common kind of flat panel display. LCD monitors use much less desk space, are lightweight and use less electricity than CRT. They have been used for many years in the screens of laptop and notebook computers. They also work as touch screens in tablet computers, mobile phones, and other handheld technologies.

TFT: is a type of LCD with a Thin Film Transistor attached to each pixel • All computer LCD screens are TFT since early 2000s; older ones had slower response times and poorer colour. Cost is now very good; power consumption is fairly good but dominated by the backlight. Has to be manufactured out of glass.

LED: Light Emitting Diode • As the name suggests, emits light rather than blocking it like LCD. Used for red/green/blue/white indicator lights everywhere. Some manufacturers advertise "LED" displays that are TFT screens with a white LED backlight, which is just confusing. Ones that are real LED screens are usually OLED.

OLED: Organic LED (rather than silicon or germanium based like regular LEDs) • Comparatively recent technology, so cost still quite variable and not available in really large sizes. In theory can be printed on plastic, resulting in lighter flexible displays with good brightness, good power consumption and good response time.

Best power consumption of all of these is a monochrome infrequently changing LCD display with no backlight.

Monitor is also known as: video display or video screen.

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