By the 24th reaper

TYPES OF MONITORS

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TYPES OF MONITORS

• CRT

• Cathode Ray Tube

• LCD

• Liquid Crystal Display

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CRT

• The filaments at the back of the cathode tube shoot a beam of electrons to the screen at the front of the tube

• This screen is coated with phosphor that glows when struck by the electron beam.

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LCD

• LCD stands for Liquid Crystal Display.

• An LCD panel produces an image using a liquid crystal material made of large, easily polarized molecules

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• Active matrix• Most common

• Contains cells of liquid crystal, a matrix of thin-film transistors (TFT)

• provides a much brighter, sharper display

• Passive matrix

• Dual-scan display

• Has a row of transistors running on the top of the screen as well as the left of the screen

TYPES OF LCD PANELS

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FEATURES OF A MONITOR

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FLAT SCREEN MONITORS

LCD - PlasmaLCD - Plasma

• Picture Quality• Normal computing, both LCD and plasma screens will

provide sharp and clear display

• Watching Blu-Ray movies or playing high-definition games, Plasma screens have less picture lag and sharper color resolution than LCD displays.

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LCD - PLASMA

• Power Usage

• LCDs use considerably less power than plasma displays, which use self-lighting pixels

• Screen Burn-In

• Plasma screens are more likely to experience screen burn-in (the screen becomes permanently discolored where the unchanging image was)

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LCD - PLASMA

• Pixel Levels• LCD screens generally have more pixels per square inch

than plasma

• makes them ideal if you are working with complex spreadsheet programs or editing software

• Size• Plasma monitors are usually ahead of the curve regarding

their maximum size

• the biggest monitors are plasma

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LCD - PLASMA

• Lifespan

• LCD monitors tend to be rated for 60,000-plus hours

• Plasma monitors range from 20,000 to 30,000 hours

• Price

• Comparable pricing

• Expensive

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ANALOG – DTV - HDTV

• Analog

• CRT sets

• signal is made of continually varying radio waves that the TV translates into a picture and sound

• DTV

• United States broadcasting is currently changed to digital television (DTV )

• The picture, even when displayed on a small TV, is better quality

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HDTV

• 18 Digital TV standards

• HDTV is the highest of all the DTV standards

• Aspect ratio, Resolution, Frame rate determines the differences.

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• Aspect ratio - Standard television has a 4:3 aspect ratio -- it is four units wide by three units high. HDTV has a 16:9 aspect ratio, more like a movie screen.

• Resolution - The lowest standard resolution (SDTV) will be about the same as analog TV and will go up to 704 x 480 pixels. The highest HDTV resolution is 1920 x 1080 pixels. HDTV can display about ten times as many pixels as an analog TV set.

• Frame rate - A set's frame rate describes how many times it creates a complete picture on the screen every second. DTV frame rates usually end in "i" or "p" to denote whether they are interlaced or progressive. DTV frame rates range from 24p (24 frames per second, progressive) to 60p (60 frames per second, progressive).

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THANK YOU

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