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CRT Monitors
Up until recently, CRTs (Cathode RayTubes) were the only type of displays for use with desktop PCs. They are relatively big (14" to 16" deep) and heavy (over 15 lbs).
They are available in screen sizes from 14" to 21". A 17" display means that it is 17" measured diagonally from one corner of the tube to the other. The actual viewing area is smaller than 17" (about 16") since the electron gun can't sweep completely to the tube edge.
CRTs send a stream of electrons at the screen, which is charged to about 25,000 volts. As they strike it they cause phosphor on the backside of the screen to glow creating light which you see. The electron stream is sweep back and forth and up and down at about 60 sweeps per second and turned off and on at the right time to make text and graphics images appear.
They are powered by standard 120Vac wall power.
Data is transferred to the display on a cable with a 15-pin D-shell connector that plugs into a connector on the video card which in turn plugs into one of the PC's expansion slots.
A 17" monitor with 1280 x 1024 resolution and .27mm dot pitch sells for around $150.
Up until recently, CRTs (Cathode RayTubes) were the only type of displays for use with desktop PCs. They are relatively big (14" to 16" deep) and heavy (over 15 lbs).
They are available in screen sizes from 14" to 21". A 17" display means that it is 17" measured diagonally from one corner of the tube to the other. The actual viewing area is smaller than 17" (about 16") since the electron gun can't sweep completely to the tube edge.
CRTs send a stream of electrons at the screen, which is charged to about 25,000 volts. As they strike it they cause phosphor on the backside of the screen to glow creating light which you see. The electron stream is sweep back and forth and up and down at about 60 sweeps per second and turned off and on at the right time to make text and graphics images appear.
They are powered by standard 120Vac wall power.
Data is transferred to the display on a cable with a 15-pin D-shell connector that plugs into a connector on the video card which in turn plugs into one of the PC's expansion slots.
A 17" monitor with 1280 x 1024 resolution and .27mm dot pitch sells for around $150.