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Output devices
An “output device” is a device that retrieves information from within a
computer in a manner that is easy to understand for humans. Typical output devices for personal computers are a “display” and “printer.”
(1)Display
Several types of displays are summarized below.
Reference
CRT
Type
CRT display
A display device that uses a CRT (Cathode Ray Tube). It comes
in a variety of sizes such as 15-inch, 17-inch, and 21-inch, and
basically uses the same principles as a CRT television. Although
it has a high display performance, it has disadvantages such as
high power consumption and the large size of the device itself.
LCD display
A display device that uses LCD (Liquid Crystal Display) technology. It ranges in size from 10 inches to around 60 inches, and employs the property of liquid crystals (light transparency changes
when voltage is applied) to display images.
OLED (Organic
Light- Emitting
Diode) display
A low voltage drive and low power consumption display device
that emits light when voltage is applied. It gets its name from the
use of luminescent organic molecules such as diamine and anthracene. The low voltage drive, low power consumption, and the
ability to produce thin displays make it possible to use it in the
same way as an LCD display.
Abbreviation for “Cathode Ray Tube.”
Reference
Pixel
A “pixel” is the smallest unit of an image, and indicates a point on a display.
Also referred to as a “dot.”
Reference
Multiscan display
A “multiscan display” refers to a display
that supports multiple resolutions.
The resolution can be changed to suit
the application.
Characteristics
(2)Printer
Printers are categorized by the unit used to print characters and other information on paper, and divided into “page printers” and “serial printers.”
A page printer stores the printing pattern for a single page in the printer
memory, and prints the page all at once. In contrast, a serial printer prints
one character at a time.
Several types of page printers and serial printers are summarized below.
●Page Printer
Type
Laser printer
Characteristics
A printing device that uses a laser beam and electrostatic technology to deposit toner on paper. Printers primarily used in offices
due to high speed and quality of printing.
Laser printer
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