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Flashcards in Output devices Deck (23):

What is a printer?

A printer is a peripheral which produces a text and/or graphics of documents stored in electronic form, usually on physical print media such as paper or transparencies.


What is a line printer?

It is a high-speed printer capable of printing an entire line at one time. A fast line printer can print as many as 3,000 lines per minute.


Disadvantages of a line printer

The disadvantages of line printers are that they cannot print graphics, the print quality is low, and they are very noisy.


What is a page printer?

Any printer that processes an entire page at a time. All laser and ink-jet printers are page printers, which means that they must have enough memory to store at least one page.


What is an impact printer?

Work by banging a head or needle against an ink ribbon to make a mark on the paper. Considerably noisier than nonimpact printers but are useful for multipart forms such as invoices.


What is a Non-impact printer?

A type of printer that does not operate by striking a head against a ribbon. Examples of nonimpact printers include laser and ink-jet printers.


What is an LCD printer?

A type of printer similar to a laser printer. Instead of using a laser to create an image on the drum, however, it shines a light through a liquid crystal panel. Individual pixels in the panel either let the light pass or block the light, thereby creating an image composed of dots on the drum.


Toner-based printers?

Use a xerographic printing process but differ from analog photocopiers in that the image is produced by the direct scanning of a laser beam across the printer's photoreceptor.


Liquid inkjet printers?

Operate by propelling variably-sized droplets of liquid or molten material (ink) onto almost any sized page.


Solid ink printers?

a type of thermal transfer printer. They use solid sticks of CMYK-coloured ink, similar in consistency to candle wax, which are melted and fed into a piezo crystal operated print-head.


Disadvantages of solid ink printers?

Drawbacks of the technology include high energy consumption and long warm-up times from a cold state. The resulting prints are difficult to write on


Dye-sublimation printers?

Transfer dye to a medium such as a plastic card, paper or canvas. The process is usually to lay one colour at a time using a ribbon that has colour panels.


Thermal printers?

Selectively heating regions of special heat-sensitive paper. Colours can be achieved with special papers and different temperatures and heating rates for different colours.


UV printers?

Will use a special reusable paper coated with a few micrometres of UV light sensitive chemicals


Advantages of CRT?

- High dynamic range, excellent color, wide gamut and low
black level.
- Can display natively in almost any resolution and refresh rate
- No input lag
- Sub-millisecond response times
- Near zero color, saturation, contrast or brightness distortion.
- Excellent viewing angle.
- Cheaper
- Allows the use of light guns/pens


Disadvantages of CRT?

- Large size and weight
- High power consumption
- Generates a considerable amount of heat
- Geometric distortion
- Can suffer screen burn-in
- Produces noticeable flicker at low refresh rates
- Hazardous to repair/service


Advantages of LCD?

- Very compact and light
- Low power consumption
- No geometric distortion
- Little or no flicker depending on backlight technology
- Not affected by screen burn-in
- No high voltage or other hazards present during repair/service
- More reliable than CRTs
- No theoretical resolution limit


Disadvantages of LCD?

- Limited viewing angle by variations in posture.
- Slow response times, which cause smearing and ghosting artefacts.
- Only one native resolution.
- Fixed bit depth
- Input lag
- Dead pixels may occur
- Uneasy replacement of the backlight
- Cannot be used with light guns/pens


Advantages of Plasma?

- High contrast ratios, excellent color, and low black level.
- Virtually no response time
- Near zero color, saturation, contrast or brightness distortion. Excellent viewing angle.
- No geometric distortion.
- Highly scalable


Disadvantages of Plasma?

- Large pixel pitch
- Image flicker due to being phosphor-based
- Heavy weight
- Glass screen can induce glare and reflections
- High operating temperature and power consumption
- Only has one native resolution
- Can suffer image burn-in
- Cannot be used with light guns/pens
- Dead pixels are possible during manufacturing


Name 5 problems on monitors.

Phosphor burn-in
Plasma burn-in
Colour misregistration
Incomplete spectrum


What are SSDs?

Solid-state storage is a nonvolatile, removable storage medium that employs integrated circuits (ICs) rather than magnetic or optical media. It is the equivalent of large-capacity, nonvolatile memory


Advantages of SSDs?

convenient, compact, and fast.
typically less susceptible to physical shock, quieter, and have lower access time and latency.