Computer Output Devices Tutorial
PRINTER PROJECTER SPEAKER PIOTTER MONITER
PRINTERS:
â DOT MATRIX:- Uses solid pins (9, 18, 24, 48) to produce letters by combining dots, more pins good result... 100-400 CPS(ch/s), ch printers...
â LASER:- Save whole page in mem & then print it, Known as Electrophotographic/pg printer 6-16 ppm (pg/min), 300- 600 + dpi(dot per inch)... uses laser cartridge...
â INK JET:- Fire droplets of ink...360+ dpi, 200+ cps(Thermal inkjet by HP, Piero by Epson).
Uses ink jet cartridge, color ink...
â LINE PRINTER:- LPT prints one line at a time, very fast used with mini comp, main frames & networks, Ribbon 1200 LPM(line/min)...
PIOTTER:
Device used to draw charts, digrames & other lines based on graphics...
â INK JET PIOTTER:- use tiny droplet of color...
â PEN P:- uses one/mor pens...
â FLATBED P:- paper is placed on a wide piotter & pens are used..
â DRUM:- paper is rolled over a cylinder...
MONITOR:
ANALOG (CRT), DIGITAL (Flat panel)...
MONITOR TERMs:
[ 1:- CRT(Cathode Ray Tube): Phosphorent dot emit light when struck by e' from gun ...
Color Bits
16 4
256 8
64k 16
16M 24
[ 2:- DOT PITCH: The diagonal distance between Phosphorent pixel of same(like) color measured in mili meter 0.22--0.39, 0.52 smaller the dot pitch sharpes the pic...
[ 3:- REFRESH RATE:" The speed at which e' beam repeat a single scan over pixels"...
70 Hz is standerd, (1 Hz = 1 cycle/s)...
[ 4:- SIZE OF MONITOR: 9 inch(22.9 cm)-- 21 inch(53 cm)... 800 x 600 = 486000 pixels...
[ 5:- TYPES OF SCANNING:
Ø A: NON INTERLACED SCANNING: A display methode in which the e' beam scans each line of screen once during each refresh cycle...
Ø B: INTERLACED SCANNING: Odd lines are scanned in one cycle & then even, go on used in analog monitor...
Ø C: PROGRESIVE SCANNING: Line by Line scanning, flat reflect less glass then curve...
[ 6:- TYPES OF MONITOR:
A: LAND SCAPE: Monitor having greater Width than Hight... Width > Hight...
B: PORTRAIT: Monitor having greater Hight than Width... Hight > Width...
