|
| |
|
| |
|
||
|
Navigation: Home > Hardware Info Library and Tips
| |||||||
|
This page has been provided to help shed some light on the importance of each type of device that is commonly installed in or available for today's computers. A monitor is your window to the world of computing. Monitors are measured and rated by several yardsticks: The size of the screen is measured in inches from inner corner to inner corner. The popular size is currently 17". Resolution is determinied in pixels (picture elements - small phosphorescent dots across the screen surface roughly 1/4 mm in diameter). The typical maximum monitor dimensions are 1024x768 (WxH) for 15", 1280x1024 for 17", 1600x1200 for 19" and 1920x1440 for 21". Pixel density is measured in dots-per-inch, where the smaller the number the closer the dots and therefore finer the detail. Monitor formats are also widely varied. The traditional CRT (aka Cathode Ray Tube) looks and operates much like a television. Inside an electrical emittor at the back fires electrons to a phosphor-laden glass screen. This emittor is actually made up of three guns -- one for green, blue and red. The electron beam passes between a set of powerful magnets which bends the beam and targets it at the screen back. Since phosphors fade over time, the emittor-gun assembly repeats the scanning of the electrons several times per second. This is called scan rate. LCD (aka Liquid Crystal Display) screens work by passing electricity through charged quartz or similar crystals set between two clear wafers. The electrical charge causes the crystals to align and emit energy. Because LCDs do not require an emittor-magnet assembly they are much thinner and use less power. LCDs are available in TFT (aka: Thin Film Transistor) and DSTN (aka: Double-layer SuperTwisted Nematic) flavors. TFT or active-matrix monitors are equipped with a transistor for each pixel to individually control the light emitting intensity and therefore allows the viewer to see the display from a wide angle or with low light. DSTN or passive-matrix uses a single light source to illuminate the display. For this reason, DSTN LCDs are less expensive than TFT LCD monitors. | |||||||
Go to eStore |
Specials |
Company |
Site Map |
Help
| ||||||||
