Can You Wash Accidental Screen Paint Ink From Shirt
Displays, oftentimes called monitors or screens, are the
most-used output device on a computer.They provide instant feedback by showing you lot text and graphic images as you work or play.
Nearly desktop displays use Liquid Crystal Display (LCD) or Cathode Ray Tube (CRT) technology, while nearly all portable computing devices, such as laptops, incorporate LCDs. Because of their slimmer blueprint and lower energy consumption, LCD monitors (likewise called flat panel or flat screen displays) are replacing CRTs.
Basic features
Resolution refers to the number of dots of color, known every bit pixels (movie elements), contained in a display. It is expressed past identifying the number of pixels on the horizontal and vertical axes. A typical resolution is 1024x768.
A pixel is a combination of red, green and blueish subpixels
Ii measurements describe the size of your brandish: the aspect ratio and the screen size. Historically, calculator displays, like most televisions, accept had an aspect ratio of 4:3 - the width of the screen to the elevation is four to 3. For widescreen LCD displays, the aspect ratio is 16:9, very useful for viewing DVD movies, playing games and displaying multiple windows side past side. High- definition TV also uses this format.The viewable screen size is measured diagonally, so a 19"screen measures 19" from the height left to the bottom right.
Within the computer there is a video adapter, or graphics bill of fare, which processes images and sends signals to the monitor. CRT monitors employ a VGA (video graphics adapter) cable, which converts digital signals into analogue signals. LCD monitors utilise a DVI (digital video interface) connection.
Colour depth refers to the number of colours a monitor can brandish. This depends on the number of bits used to describe the colour of a single pixel. For example, an one-time VGA monitor with an viii-bit depth can generate 256 colours and a SuperVGA with a 24-flake depth can generate 16.7 million colours. Monitors with a 32-bit depth are used in digital video, blitheness and video games to get certain effects.
Display technologies
An LCD is fabricated of two drinking glass plates with a liquid crystal textile between them. The crystals block the lite in different quantities to create the image. Agile-matrix LCDs apply TFT (thin film transistor) technology, in which each pixel has its ain switch. The amount of light the LCD monitor produces is called brightness or luminance, measured in cd/grand2 (candela per foursquare metre).
A CRT monitor is similar to a traditional Television receiver. Information technology contains millions of tiny scarlet, green and blue phosphor dots that glow when struck by an electron beam that travels across the screen and create a visible image.
PCs can be connected to video projectors, which projection the epitome onto a big screen. They are used for presentations and habitation theatre applications.
In a plasma screen, images are created by a plasma discharge which contains noble (non-harmful) gases. Plasma TVs allow for larger screens and wide viewing angles, making them platonic for movies.
Organic Light-Emitting Diodes (OLEDs) are thin-film LED displays that don't require a backlight to function. The textile emits low-cal when stimulated by an electrical current, which is known equally electroluminescence.They swallow less energy, produce brighter colours and are flexible - i.eastward. they tin be bent and rolled up when they're non being used.
Choosing the right display device
aE Listen to five customers in a computer store describing their brandish device needs. Which device (a-e) would you recommend to each person? In pairs, discuss your choices and give reasons for them.
Speaker 1________________________ Speaker 4____________________________
Speaker 2________________________ Speaker 5____________________________
Speaker 3________________________
Widescreen 24" flat console Resolution: 1920x1200 Colour support: xvi.7 million Multiple video inputs, flash- menu slots and USB ports
NEC MultiSyn LCD Monitor Screen size: 17"
Resolution: 1280x1024 (SXGA) Aspect ratio: 5:4 Brightness: 400 cd/m2
Dell UltraSharp LCD monitor
Cambridge- Hitachi interactive whiteboard Allows interaction with a projected reckoner image Board size: 78" Connected to the PC via USB Pointing device: cordless pen
Pioneer l" Plasma Goggle box Resolution: 1280x768 (XGA) Blu-ray Disc recorder v.i environment audio organization (Five audio channels plus one subwoofer)
Portable projector
DLP (Digital Light Processing) engineering science
Resolution: 1024x768
Projection screen
В Irll In pairs, hash out which of the display devices yous would virtually like to own. Give reasons for your choice.
Display screens and ergonomics
4 Ergonomics
A BLi Listen to Tony Clark, an expert in computer ergonomics, talking to some
office workers about health and safety. What wellness problems associated with
computer apply do the function workers mention?
В Ipij Heed once more and complete these extracts.
one Go a expert chair, one that.......................................... your lower dorsum and is
two Make sure your feet residual firmly........................................ or on a footrest.
3 Position the keyboard .............................................. your elbows, with your artillery
___ __ ......i............................... the piece of work surface ...
four ... position the monitor at, or just below,..........................................
5 You should sit at________________________ from the front of the monitor, about fifty to seventy
centimetres abroad.
6 ... a kind of stand that lets yous move the monitor ....................................... , so you can use it
at the correct angle and height.
С Match the extracts in a higher place (1-6) with the correct parts of the diagram (a-f).
Ergonomics - the study of how people interact safely and efficiently with machines and their piece of work conditions
Language piece of work: instructions and communication
Look at the Assist box then complete these health and safety guidelines withshould/shouldn't.
ane If y'all type a lot at your computer each
day, y'all........................... buy an ergonomic
keyboard; it tin can assistance reduce the risk of repetitive strain injury.
2 You..................... place your mouse
within piece of cake accomplish and support your forearm.
3 If you lot make up one's mind to build your ain PC, protect yourself from electric shocks. You
____________ touch any components
unnecessarily.
4 You____________ e'er use a
copyholder if y'all are working from
• We utilise the imperative to give instructions. Get an adaptable chair.
Don't put your monitor in forepart of a window.
• We apply should and shouldn't + infinitive to give advice or to talk about what we think is a good or bad idea.
You should wait down at the monitor, non upward.
You shouldn't use a monitor that's fuzzy or distorts the image.
• Nosotros can also give advice by using set phrases like It'southward a good idea to or Information technology'southward a bad idea to
+ infinitive.
Instructions and advice
It'southward a practiced idea to have a monitor with a tilt- and-swivel stand.
documents.The best position is betwixt the screen and the keyboard, or at the same height equally the screen; this can reduce neck, back and eyestrain.
Irresponsible disposal of electronic waste can cause astringent environmental and health problems. Yous only throw your former monitor or video system into the bin.
В IWl In pairs, practise giving advice about how to use a monitor safely using should/shouldn't orIt's a good/bad thought to. Look at these guidelines for help.
ane Don't open the monitor. It's dangerous.
ii Don't stare at the screen for long periods of time.
3 Position the monitor at eye level or simply beneath.
4 Leave plenty space behind the monitor for unobstructed movement.
v Don't sit down almost the sides or back of CRT monitors. Use LCD screens instead - they're costless from radiation.
6 Continue the screen clean to forbid distorting shadows.
An ergonomic school or function
You have been asked to write a list of guidelines for making your school or office more ergonomic. Look at the definition of ergonomics at the bottom of page 35 and then write an e-mail to your instructor/manager explaining your guidelines. Consider i-8 below.
ane Concrete layout of the work site: desk areas, figurer equipment, filing cabinets, etc.
2 Lighting (overhead lights, desk lamps), glare and ventilation
3 Computer and role article of furniture: ergonomic chairs and desks
four User-friendly and ergonomic devices: keyboards, mice, monitors, wrist rests, copyholders, etc.
5 Location and features of telephones
6 Layout of cables and switches for a wired network
7 Wireless internet access and wireless network
8 Maintenance and technical repairs
Types of printer
How many types of printer can you think of? Brand a list.
Read the article on page 38 and and so label the types of printer (ane-5). Which types of printer aren't pictured?
The quality (resolution) of the images goes upwards to 2,400 dots per inch (dpi)
1_________________
Provides high quality output: a resolution of 1,200-ii,400 dpi
The resolution depends on the number of pins
3________________
Provides the highest resolution: more than than 3,000 dpi
SHOULD I BUY?
Printing is the terminal stage in creating a certificate. Since the results you can obtain with unlike types of printer will vary substantially, here is a guide to help you decide which one is most suitable for your needs.
To begin with, you should take into account that printers vary in cost, speed, impress quality, and other factors such as noise or printing method. Applied science is evolving then quickly that there is ever a printer for every application or need.
Dot-matrix printers use pins to print the dots required to shape a character. They can impress text and graphics; nonetheless, they produce relatively depression resolution output — 72 to 180 dots per inch (dpi).They are used to print multi-office forms, cocky-copying paper and continuous-form labels.They are slower than light amplification by stimulated emission of radiation printers (see below) merely much cheaper.
Inkjet printers operate by projecting pocket-size ink aerosol onto paper to course the required image. Color and hues are created by the precise mixing of cyan, magenta, yellowish and black inks. Inkjets are adequately fast, quiet, and not as expensive as laser printers. Nevertheless, you tin can even so expect high quality results because there are some inkjet printers on the market with a resolution of 2,400 dpi.
Light amplification by stimulated emission of radiation printers produce output at not bad speed and with a very loftier resolution of i,200—2,400 dpi. They scan the image with a laser beam and transfer it to newspaper with a special ink powder chosen toner. They are constantly being improved. In terms of speed and image quality, laser printers are preferred by experts for various reasons; for instance, they take a wider range of scalable fonts than inkjets, tin can emulate different language systems, and tin produce high- quality graphics; however, they are however expensive for home users.
Thermal transfer printers are used to produce colour images by transferring a wax-based ink onto the paper.They are popular for printing bar codes, labels and medium-resolution graphics.
Imagesetters produce very loftier-resolution output (upwards to 3,540 dpi) on paper or on the bodily film for making the printing plates. In addition, they are extremely fast. Imagesetters are most often used in desktop publishing (DTP). Although they produce the highest quality output, they take one of import disadvantage: they are too expensive for homes or small offices.
In modern lithographic printing, images are created on a DTP computer and then output directly to the printing plates, without requiring picture as an intermediate pace. This engineering is called computer to plate, or CTP, and the motorcar used is chosen a platesetter.
Finally, we have plotters. Plotters use ink and fine pens held in a carriage to draw very detailed designs on paper. They are used for structure plans, engineering drawings and other technical illustrations. Nowadays, traditional plotters are being replaced with wide-format inkjets.
Observe words in the article with the following meanings.
1 designs and images used in magazines, books, etc. (lines 10-xv)________
two output quality, measured in dots per inch (lines 10-fifteen)................
3 a particular colour within the color spectrum (lines 15-20)__________
4 an ink powder used in laser printers and copiers (lines 25-xxx)................
five ready of characters that can be resized (enlarged or reduced) without introducing distortion (lines 30-35) ____________________
6 a rectangular pattern of black lines of magnetic ink printed on an object so that its details can be read past a computer organisation (lines 35-40) .................................................
vii surface that carries a reproduction of the paradigm, from which the pages are printed (lines 45-50)
8 in-betwixt; center (lines 50-55)..................
Language piece of work: connectors i
ALook at the Assistance box and then put the words in italics from the commodity on folio 38 into the right column of the tabular array.
| Giving examples | Listing/Sequencing | Giving reason/cause |
ВEffort to add some more connectors to each column. How do you say these connectors in your linguistic communication?
Connectors 1
Connectors are linking words and phrases which join ideas and help u.s. organize our writing. Connectors tin can be used for giving examples, listing or sequencing, and giving reason or cause.
for example, they take a wider range of...
To begin with, you should take into account that printers vary in cost...
In pairs, draw the features of your platonic printer.
Some mutual connectors appear in italics in the article on folio 38. For more on other uses of connectors, see Unit of measurement 11.
С ьШWrite a paragraph describing the printer(s) you use at home or at work. Endeavour to use some connectors. Retrieve about these aspects: type, speed, resolution, impress quality, retentivity, price, print consumables (ink cartridges etc.).
Choosing the right printer
API In pairs, cull the almost suitable printer for each of these situations. Give reasons for your choices.
1 You want to impress documents, web pages and occasional photographs at dwelling.
2 A small company needs a printer which will exist shared by various users on a local surface area network (LAN).
3 A professional person team of architects and engineers need to create accurate representations of objects in technical drawings and CAD.
4 A graphic arts business organisation needs a printer to produce catalogues, brochures and other publications.
Multi-function printers
A yjy Heed to an excerpt from a consumer engineering podcast about multi-function printers. What two disadvantages of multi-function printers are mentioned?
L. Heed once again and respond these questions.
1 What is a multi-function printer?
ii Why are multi-part printers so pop?
3 What is the master advantage of PictBridge technology?
4 Autonomously from sheets of paper, what other things can multi-function printers impress?
v What software do yous commonly go when y'all buy a multi-function printer?
Comparatives
• We grade the comparative of one- syllable adjectives past adding -er. dull —slower
6 What advice does Mr Kelly give on ink cartridges?
Inkjet printers are slower than laser printers, but much cheaper Two-syllable adjectives usually accept more/less.
vii What type of device does he recommend for home users?
8 What blazon of device does he recommend for businesses?
Language work: comparatives
Expect at the Help box and so complete these sentences using the comparative class of the adjective in brackets.
1 A laser printer is generally (tranquillity)
................................ than a low-price inkjet
printer.
2 Multi-role printers are now but slightly
(expensive)................................ than
conventional printers, and offer much (corking) versatility.
3 The print quality of this network printer is
noticeably (proficient)__________________ than
any inkjet, and equally (skilful)..............................
every bit like light amplification by stimulated emission of radiation printers.
4 The Agfa platesetter is (reliable)
..................... _............... and (easy)
................................ to use than nearly printers
of its blazon.
Your printer is only as (adept)
................................ equally the newspaper you use.
The last result is always (accurate) than the original paradigm.
An imagesetter is (heavy)............................ _...
than a laser printer.
■ more than modern
They're designing a more modern version at the moment.
Adjectives ending in -y (for example, noisy) take -er and the у changes to i.
Dot-matrix printers are noisier than inkjets.
We grade the comparative of adjectives with iii or more syllables by calculation more than/less
versatile —>- more than versatile
... they're cheaper and more versatile than standalone products.
Note the irregular forms:
good —► meliorate bad —>■ worse picayune —► less
If y'all desire better results, you'll demand specialized software.
Equality is expressed by using as as. Deviation can exist shown by using not every bit equally
This is as fast as many other printers in its class.
Inkjets are not equally expensive as light amplification by stimulated emission of radiation printers.
б Reading quiz - printer adverts
AIn pairs, read the adverts and then answer these questions. See who in your class can cease starting time.
1How many Inkjet printers are advertised?
2Which printer would you recommend to someone who wants to print advertising graphics?
3If you have the broad-format printer from Vutek, what kinds of fabric can you print on?
4Which technology lets you lot print directly from your digital camera without needing a computer in between?
5A folio description language, or PDL, describes how to print the text and pictures on the folio. Can you lot find two laser printer languages?
half dozenWhat is the resolution of the Blood brother HL Network Colour Laser Printer?
7How fast is the Brother HL Network Colour Laser Printer?
Canon Compact Photo Printer SELPHY CP750 Photo Printer
An inkjet photo printer with a 2.iv" colour LCD for easy viewing, editing and printing of perfect borderless photos. With PictBridge, yous tin impress straight from digital cameras, memory cards or photographic camera phones (via IrDA or optional Bluetooth unit) without connecting to a PC.
Resolution: 300x300 dpi
Software: Easy-PhotoPrint
Dimensions: 179x127.1x63 mm
The Vutek UltraVu II5330 provides the ultimate combination of highest
print speed and best print quality in a five-metre printer.
v Wide-format professional inkjet printer
• Prints on a wide variety of substrates, including vinyl, and pressure level- sensitive paper, mesh and textiles
• VUTEK Low Friction Kit allows for difficult materials to be run more easily
• Prints upwards to sixteen.four feet (five metres) broad
• Up to 330 dpi resolution produces images that are sharp, crisp and consequent
• Prints upwards to 2,230 square feet (207 square metres) per hour
• Applications: banners, exhibition graphics, charabanc shelters, etc.
Brother HL Network Color Laser Printer
The HL-4040CN delivers the perfect residual of quality, workgroup, colour A4 light amplification by stimulated emission of radiation printing.
Print Speed: up to 31 ppm (pages per minute) mono, 8 ppm color (A4) Compatibility: PCL and PostScript languages Newspaper tray capacity: 250 sheets Memory size: 64MB High-speed USB
It boasts outstanding color output: 2,400 dpi grade colour press with exceptionally well-baked, high-resolution text and graphics driven by Brother's exclusive printing enhancement technologies.
В yfyA friend has emailed you request for advice about which printer to buy, the Catechism SELPHY CP750 or the Brother HL Network Colour Light amplification by stimulated emission of radiation Printer. Write an e-mail to your friend comparing the two printers. Use the Assistance box on page 40 to assistance you.
"issil^
9Devices for the disabled
Assistive engineering
A 1000 In pairs, wait at the words in the box and apply as many of them as you can to draw the photos. You will not need all the words.
adapted keyboard on-screen keyboard vocalisation recognition system screen-pointing device screen reader
blind person motor-impaired person screen magnifier Braille printer adaptive switch touch screen
pneumatic switch (sip and puff)
Devices for the disabled
iV-^ane In pairs, discuss these questions.
one What sort of difficulties practice you think are experienced by computer users with limitations of vision or mobility?
ii What types of device could be helpful to blind users?
3 How tin can a person with mobility limitations communicate with a estimator?
Computers for the disabled
ARead the text and discover the following.
ane the laws which ensure equal opportunities for people with disabilities in the USA and the United kingdom of great britain and northern ireland
2 how the blind student in the photograph interacts with the auto
three the systems which blazon on the screen what is being said in meetings
4 the type of software which reads printed material, recognizes the text then sends it to the PC
five the organisation which is activated by the user's center movements
vi the switch which tin be used past someone with quadriplegia
7 the role of voice recognition devices
Displays, often called monitors or screens, are the
near-used output device on a computer.They provide instant feedback by showing you text and graphic images as you work or play.
Most desktop displays utilize Liquid Crystal Display (LCD) or Cathode Ray Tube (CRT) technology, while almost all portable computing devices, such as laptops, incorporate LCDs. Because of their slimmer pattern and lower free energy consumption, LCD monitors (also called flat console or flat screen displays) are replacing CRTs.
Basic features
Resolution refers to the number of dots of colour, known equally pixels (picture elements), contained in a display. It is expressed by identifying the number of pixels on the horizontal and vertical axes. A typical resolution is 1024x768.
A pixel is a combination of reddish, light-green and blue subpixels
Two measurements describe the size of your display: the aspect ratio and the screen size. Historically, calculator displays, similar well-nigh televisions, have had an aspect ratio of 4:3 - the width of the screen to the height is iv to iii. For widescreen LCD displays, the aspect ratio is 16:9, very useful for viewing DVD movies, playing games and displaying multiple windows next. High- definition TV also uses this format.The viewable screen size is measured diagonally, and then a 19"screen measures 19" from the top left to the bottom right.
Inside the computer in that location is a video adapter, or graphics carte, which processes images and sends signals to the monitor. CRT monitors use a VGA (video graphics adapter) cable, which converts digital signals into counterpart signals. LCD monitors use a DVI (digital video interface) connexion.
Color depth refers to the number of colours a monitor can display. This depends on the number of $.25 used to describe the colour of a single pixel. For example, an former VGA monitor with an 8-scrap depth can generate 256 colours and a SuperVGA with a 24-chip depth tin can generate xvi.7 million colours. Monitors with a 32-bit depth are used in digital video, animation and video games to become sure effects.
Brandish technologies
An LCD is made of two glass plates with a liquid crystal material between them. The crystals cake the lite in different quantities to create the image. Agile-matrix LCDs use TFT (thin film transistor) technology, in which each pixel has its own switch. The amount of low-cal the LCD monitor produces is called brightness or luminance, measured in cd/m2 (candela per square metre).
A CRT monitor is like to a traditional Idiot box. It contains millions of tiny red, green and bluish phosphor dots that glow when struck past an electron beam that travels across the screen and create a visible image.
PCs can be connected to video projectors, which project the image onto a large screen. They are used for presentations and home theatre applications.
In a plasma screen, images are created past a plasma discharge which contains noble (non-harmful) gases. Plasma TVs allow for larger screens and broad viewing angles, making them ideal for movies.
Organic Light-Emitting Diodes (OLEDs) are sparse-film LED displays that don't require a backlight to function. The material emits calorie-free when stimulated by an electrical current, which is known as electroluminescence.They consume less energy, produce brighter colours and are flexible - i.e. they can be bent and rolled up when they're non being used.
Choosing the right display device
aE Mind to five customers in a figurer shop describing their display device needs. Which device (a-e) would you recommend to each person? In pairs, discuss your choices and give reasons for them.
Speaker 1________________________ Speaker 4____________________________
Speaker 2________________________ Speaker 5____________________________
Speaker 3________________________
Widescreen 24" flat panel Resolution: 1920x1200 Colour support: xvi.7 million Multiple video inputs, flash- card slots and USB ports
NEC MultiSyn LCD Monitor Screen size: 17"
Resolution: 1280x1024 (SXGA) Aspect ratio: 5:4 Effulgence: 400 cd/mii
Dell UltraSharp LCD monitor
Cambridge- Hitachi interactive whiteboard Allows interaction with a projected reckoner image Lath size: 78" Connected to the PC via USB Pointing device: cordless pen
Pioneer 50" Plasma Television Resolution: 1280x768 (XGA) Blu-ray Disc recorder 5.1 surround sound system (Five audio channels plus one subwoofer)
Portable projector
DLP (Digital Lite Processing) technology
Resolution: 1024x768
Projection screen
В Irll In pairs, talk over which of the display devices y'all would near like to own. Requite reasons for your option.
Brandish screens and ergonomics
4 Ergonomics
A BLi Mind to Tony Clark, an expert in computer ergonomics, talking to some
office workers about health and safety. What health problems associated with
computer employ do the role workers mention?
В Ipij Listen again and complete these extracts.
1 Get a good chair, one that.......................................... your lower dorsum and is
2 Brand sure your feet rest firmly........................................ or on a footrest.
three Position the keyboard .............................................. your elbows, with your arms
___ __ ......i............................... the work surface ...
4 ... position the monitor at, or but beneath,..........................................
5 You should sit at________________________ from the forepart of the monitor, near 50 to 70
centimetres away.
half-dozen ... a kind of stand that lets you move the monitor ....................................... , and so you tin employ it
at the correct bending and peak.
С Match the extracts above (1-half-dozen) with the correct parts of the diagram (a-f).
Ergonomics - the written report of how people interact safely and efficiently with machines and their work conditions
Language work: instructions and advice
Look at the Aid box and and then complete these health and safety guidelines withshould/shouldn't.
i If you blazon a lot at your calculator each
day, you lot........................... buy an ergonomic
keyboard; it can aid reduce the risk of repetitive strain injury.
2 You..................... place your mouse
within piece of cake reach and support your forearm.
3 If y'all decide to build your own PC, protect yourself from electric shocks. You
____________ touch any components
unnecessarily.
iv You____________ always use a
copyholder if you are working from
• We use the imperative to give instructions. Get an adjustable chair.
Don't put your monitor in front of a window.
• We use should and shouldn't + infinitive to requite advice or to talk nigh what we call back is a good or bad idea.
You should look downwardly at the monitor, not upwards.
You shouldn't use a monitor that's fuzzy or distorts the epitome.
• We tin also requite advice by using set phrases like It's a good idea to or It's a bad thought to
+ infinitive.
Instructions and communication
It's a good idea to have a monitor with a tilt- and-swivel stand.
documents.The best position is between the screen and the keyboard, or at the same height as the screen; this can reduce cervix, back and eyestrain.
Irresponsible disposal of electronic waste can cause severe ecology and health problems. You but throw your old monitor or video system into the bin.
В IWl In pairs, practise giving advice about how to use a monitor safely using should/shouldn't orIt's a good/bad thought to. Look at these guidelines for help.
1 Don't open up the monitor. It's dangerous.
2 Don't stare at the screen for long periods of time.
3 Position the monitor at centre level or just beneath.
iv Leave plenty infinite backside the monitor for unobstructed move.
5 Don't sit down virtually the sides or dorsum of CRT monitors. Apply LCD screens instead - they're gratis from radiation.
6 Keep the screen clean to prevent distorting shadows.
An ergonomic school or office
Y'all have been asked to write a list of guidelines for making your school or office more ergonomic. Await at the definition of ergonomics at the bottom of folio 35 and then write an electronic mail to your teacher/manager explaining your guidelines. Consider ane-8 below.
i Physical layout of the work site: desk-bound areas, computer equipment, filing cabinets, etc.
2 Lighting (overhead lights, desk lamps), glare and ventilation
iii Reckoner and office furniture: ergonomic chairs and desks
four Convenient and ergonomic devices: keyboards, mice, monitors, wrist rests, copyholders, etc.
5 Location and features of telephones
half-dozen Layout of cables and switches for a wired network
7 Wireless internet access and wireless network
8 Maintenance and technical repairs
Types of printer
How many types of printer tin can you retrieve of? Make a listing.
Read the article on folio 38 and so label the types of printer (1-5). Which types of printer aren't pictured?
The quality (resolution) of the images goes upward to 2,400 dots per inch (dpi)
1_________________
Provides loftier quality output: a resolution of 1,200-2,400 dpi
The resolution depends on the number of pins
3________________
Provides the highest resolution: more than three,000 dpi
SHOULD I BUY?
Printing is the final stage in creating a certificate. Since the results you can obtain with different types of printer volition vary substantially, here is a guide to assist you decide which 1 is nigh suitable for your needs.
To begin with, you should take into account that printers vary in cost, speed, impress quality, and other factors such as noise or printing method. Technology is evolving so quickly that in that location is always a printer for every application or demand.
Dot-matrix printers use pins to impress the dots required to shape a character. They can impress text and graphics; however, they produce relatively low resolution output — 72 to 180 dots per inch (dpi).They are used to print multi-function forms, self-copying newspaper and continuous-form labels.They are slower than laser printers (come across below) but much cheaper.
Inkjet printers operate past projecting small ink droplets onto newspaper to form the required image. Colour and hues are created by the precise mixing of cyan, magenta, yellow and black inks. Inkjets are fairly fast, quiet, and not equally expensive as light amplification by stimulated emission of radiation printers. All the same, you can still expect high quality results considering at that place are some inkjet printers on the marketplace with a resolution of 2,400 dpi.
Laser printers produce output at great speed and with a very high resolution of 1,200—ii,400 dpi. They scan the image with a light amplification by stimulated emission of radiation axle and transfer it to newspaper with a special ink pulverization called toner. They are constantly being improved. In terms of speed and image quality, laser printers are preferred by experts for various reasons; for instance, they accept a wider range of scalable fonts than inkjets, can emulate different linguistic communication systems, and tin produce high- quality graphics; however, they are still expensive for dwelling users.
Thermal transfer printers are used to produce color images by transferring a wax-based ink onto the paper.They are popular for press bar codes, labels and medium-resolution graphics.
Imagesetters produce very high-resolution output (upwardly to 3,540 dpi) on paper or on the actual film for making the press plates. In improver, they are extremely fast. Imagesetters are most frequently used in desktop publishing (DTP). Although they produce the highest quality output, they have one important disadvantage: they are likewise expensive for homes or small offices.
In modern lithographic press, images are created on a DTP computer and then output direct to the printing plates, without requiring film every bit an intermediate step. This technology is called reckoner to plate, or CTP, and the machine used is chosen a platesetter.
Finally, we accept plotters. Plotters use ink and fine pens held in a carriage to draw very detailed designs on paper. They are used for construction plans, technology drawings and other technical illustrations. Nowadays, traditional plotters are beingness replaced with broad-format inkjets.
Detect words in the article with the following meanings.
1 designs and images used in magazines, books, etc. (lines 10-15)________
ii output quality, measured in dots per inch (lines 10-15)................
3 a item colour within the colour spectrum (lines 15-20)__________
4 an ink powder used in laser printers and copiers (lines 25-30)................
5 set of characters that can be resized (enlarged or reduced) without introducing distortion (lines 30-35) ____________________
half-dozen a rectangular design of blackness lines of magnetic ink printed on an object and then that its details can be read by a computer organization (lines 35-forty) .................................................
7 surface that carries a reproduction of the image, from which the pages are printed (lines 45-50)
8 in-betwixt; middle (lines 50-55)..................
Linguistic communication work: connectors 1
ALook at the HELP box and then put the words in italics from the article on folio 38 into the correct column of the table.
| Giving examples | Listing/Sequencing | Giving reason/cause |
ВTry to add together some more than connectors to each cavalcade. How do you say these connectors in your linguistic communication?
Connectors 1
Connectors are linking words and phrases which bring together ideas and help us organize our writing. Connectors can be used for giving examples, listing or sequencing, and giving reason or cause.
for example, they accept a wider range of...
To begin with, you should take into account that printers vary in cost...
In pairs, describe the features of your ideal printer.
Some mutual connectors appear in italics in the article on page 38. For more on other uses of connectors, see Unit 11.
С ьШWrite a paragraph describing the printer(due south) you lot employ at home or at work. Try to use some connectors. Retrieve almost these aspects: type, speed, resolution, print quality, memory, cost, impress consumables (ink cartridges etc.).
Choosing the correct printer
API In pairs, choose the near suitable printer for each of these situations. Give reasons for your choices.
1 You lot desire to print documents, spider web pages and occasional photographs at home.
ii A small company needs a printer which volition exist shared by various users on a local expanse network (LAN).
iii A professional person squad of architects and engineers demand to create authentic representations of objects in technical drawings and CAD.
4 A graphic arts business needs a printer to produce catalogues, brochures and other publications.
Multi-function printers
A yjy Listen to an extract from a consumer applied science podcast about multi-function printers. What two disadvantages of multi-role printers are mentioned?
Fifty. Listen again and reply these questions.
1 What is a multi-function printer?
2 Why are multi-function printers so pop?
iii What is the main reward of PictBridge technology?
4 Autonomously from sheets of paper, what other things can multi-part printers print?
v What software exercise you usually get when you purchase a multi-function printer?
Comparatives
• We grade the comparative of i- syllable adjectives by adding -er. slow —slower
vi What advice does Mr Kelly give on ink cartridges?
Inkjet printers are slower than laser printers, merely much cheaper Two-syllable adjectives usually have more than/less.
vii What blazon of device does he recommend for dwelling house users?
viii What type of device does he recommend for businesses?
Language piece of work: comparatives
Look at the HELP box and then complete these sentences using the comparative form of the describing word in brackets.
1 A laser printer is generally (tranquillity)
................................ than a low-cost inkjet
printer.
2 Multi-function printers are at present only slightly
(expensive)................................ than
conventional printers, and offering much (great) versatility.
3 The print quality of this network printer is
noticeably (skilful)__________________ than
any inkjet, and every bit (skillful)..............................
equally similar laser printers.
4 The Agfa platesetter is (reliable)
..................... _............... and (piece of cake)
................................ to use than nigh printers
of its type.
Your printer is just every bit (good)
................................ equally the newspaper you use.
The final issue is always (authentic) than the original prototype.
An imagesetter is (heavy)............................ _...
than a laser printer.
■ more modern
They're designing a more mod version at the moment.
Adjectives ending in -y (for case, noisy) take -er and the у changes to i.
Dot-matrix printers are noisier than inkjets.
We class the comparative of adjectives with 3 or more than syllables by adding more/less
versatile —>- more versatile
... they're cheaper and more versatile than standalone products.
Note the irregular forms:
proficient —► amend bad —>■ worse little —► less
If y'all want better results, yous'll need specialized software.
Equality is expressed by using as as. Departure can exist shown by using not equally as
This is every bit fast as many other printers in its course.
Inkjets are not equally expensive as laser printers.
б Reading quiz - printer adverts
AIn pairs, read the adverts and so answer these questions. See who in your class tin finish kickoff.
aneHow many Inkjet printers are advertised?
iiWhich printer would you recommend to someone who wants to print advertising graphics?
threeIf you have the wide-format printer from Vutek, what kinds of textile can you print on?
ivWhich engineering science lets you impress straight from your digital camera without needing a computer in betwixt?
fiveA page description language, or PDL, describes how to print the text and pictures on the page. Can you observe two laser printer languages?
half dozenWhat is the resolution of the Brother HL Network Colour Laser Printer?
7How fast is the Brother HL Network Color Light amplification by stimulated emission of radiation Printer?
Canon Compact Photo Printer SELPHY CP750 Photo Printer
An inkjet photo printer with a 2.4" colour LCD for piece of cake viewing, editing and printing of perfect borderless photos. With PictBridge, you tin can print directly from digital cameras, retentivity cards or camera phones (via IrDA or optional Bluetooth unit) without connecting to a PC.
Resolution: 300x300 dpi
Software: Easy-PhotoPrint
Dimensions: 179x127.1x63 mm
The Vutek UltraVu II5330 provides the ultimate combination of highest
impress speed and best impress quality in a v-metre printer.
v Wide-format professional person inkjet printer
• Prints on a wide variety of substrates, including vinyl, and pressure- sensitive paper, mesh and textiles
• VUTEK Low Friction Kit allows for hard materials to be run more easily
• Prints up to xvi.four feet (5 metres) wide
• Up to 330 dpi resolution produces images that are sharp, crisp and consistent
• Prints upward to 2,230 foursquare feet (207 square metres) per hr
• Applications: banners, exhibition graphics, bus shelters, etc.
Brother HL Network Colour Laser Printer
The HL-4040CN delivers the perfect residuum of quality, workgroup, colour A4 laser printing.
Print Speed: up to 31 ppm (pages per minute) mono, 8 ppm color (A4) Compatibility: PCL and PostScript languages Paper tray capacity: 250 sheets Memory size: 64MB High-speed USB
It boasts outstanding color output: 2,400 dpi class colour press with exceptionally well-baked, high-resolution text and graphics driven past Brother's exclusive printing enhancement technologies.
В yfyA friend has emailed you asking for advice about which printer to buy, the Canon SELPHY CP750 or the Brother HL Network Colour Light amplification by stimulated emission of radiation Printer. Write an email to your friend comparing the 2 printers. Use the HELP box on page 40 to assistance y'all.
"issil^
9Devices for the disabled
Assistive applied science
A Grand In pairs, look at the words in the box and use as many of them as y'all tin to describe the photos. You will non need all the words.
adjusted keyboard on-screen keyboard voice recognition system screen-pointing device screen reader
blind person motor-impaired person screen magnifier Braille printer adaptive switch touch screen
pneumatic switch (sip and puff)
Devices for the disabled
iV-^i In pairs, discuss these questions.
1 What sort of difficulties practice you lot remember are experienced by computer users with limitations of vision or mobility?
2 What types of device could be helpful to blind users?
3 How can a person with mobility limitations communicate with a figurer?
Computers for the disabled
ARead the text and notice the following.
i the laws which ensure equal opportunities for people with disabilities in the Us and the U.k.
two how the bullheaded student in the photo interacts with the machine
iii the systems which type on the screen what is beingness said in meetings
4 the type of software which reads printed fabric, recognizes the text and so sends information technology to the PC
5 the system which is activated past the user's eye movements
6 the switch which can be used by someone with quadriplegia
seven the function of voice recognition devices
Source: https://studopedia.ru/15_64038_How-screen-displays-work.html
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