Output Device 2

Output Device 2

1. LED Monitor

   • An LED display is a flat panel display, which uses light-emitting diodes as a video display
   • 1. Energy efficient- capable of outputting 135 watts. 2. Long lifetime. 50,000 hours or more. However, LEDs are more exspensive

2. Drivers

   • A driver is a computer program that operates or controls a particular device attached to a computer
   • 1. Need knowledge to initially set it up, drivers are hardware dependant and operating-system specific

3. Speakers

   • Can produce beeping sound to warn user of an error. A sound chip can be fitted which can enable sound output through speakers
   • 1. everyone in the room can hear the output 2. helps blind people. However, it can disturb people and can be expensive

4. Resolution and Pixels

   • High resolution means it can display a large number of pixels on screen. An image is made up of pixels, quality of image depends on how many pixels there are
   • With more pixels you can further crop images. The more pixels, the better the print out of an image. Storage space is a disadvanatge and can take longer to process larger files

5. Actuator

   • This is the name given to a device that moves something when commanded to do so
   • A linear actuator has a long lifetime, low or no maintenance, low force

6. Spooling and Buffering

   • Spooling is putting data into a temporary working area so it can be accessed and processed by another program. Buffering allows data to be stored temporarily into a reserved are of memory
   • Spooling- processes are not suspended for a long time, need a lot of disk space. Buffering- can receive data at high speed, works at different speeds