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B. Listen again and complete these extracts




Ergonomics

B. In pairs, discuss which of the display devices you would most like to own. Give reasons for your choice.

Choosing the right display device

B. Read the text again and answer these questions.

A. Complete these definitions with words from the box. Then read the text on page 33 and check your answers.

How screen displays work

In pairs, discuss these questions.

Your computer screen

UNIT 7 DISPLAY SCREENS AND ERGOMOMICS

In pairs, describe your digital camera, webcam or video camera. Think about these questions.

Describing a camera

Complete the press relaese with words from the box.

colour megapixels shot video optical brighter reduction

 

 

· What do you use the device for?

· Why did you buy that particular make/model?

· What are your favourite functions?

· What improvements would you make to the device?

1. What type of display do you have: a cathode ray tube or an LCD flat screen?

2. What size is the screen?

3. How can you change the picture using the controls?

4. Can you watch TV on your PC monitor?

 

 

An Apple Mac flat screen monitor

resolution pixel aspect ratio colour depth video adapter plasma screen

1. ____ - the smallest unit on a display screen or bitmapped image (usually a coloured dot)

2. ____ - an expansion card that generates the video signal sent to a computer display

3. ____ - the width of the screen in proportion to its height

4. ____ - also called gas discharge display

5. ____ - the number of pixels contained in a display, horizontally and vertically

6. ____ - the number of bits used to hold a colour pixel; this determines the maximum number of colours that can be displayed

1. What do CRT and LCD stand for?

2. How is the screen size measured?

3. What technology is used by active-matrix LCDs?

4. Which unit of frequency is used to measure the brightness of a display?

5. What substance produces light and colour when hit by electrons in a CRT monitor?

6. What are the three advantages of OLED displays?

 

 

A. Listen to five customers in a computer shop describing their display device needs. Which device 9a-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 ____    

 

A. Listen to Tony Clark, an expert in computer ergonomics, talking to some office workers about health and safety. What health problems associated with computer use do the workers mention?

1. Get a good chair, one that ____ your lower back and is ____.

2. Make sure feet rest firmly ____ or on a footrest.

3. Position the keyboard ____ your elbows, with your arms ____ the work surface …

4. … position the monitor at, or just below, ____.

5. You should sit at ____ from the front of the monitor, about 50 to 70 centimetres away.

6. … a kind of stand that lets you move the monitor ____, so you can use it at the correct angle and height.




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