Тема 7 Принцип роботи монітора. - part 15

1 Прочитайте та вивчіть терміни (усно)

TFT-LCD (Thin – Film – Transistor – Liquid – Crystal – Display) – рідкокристалічний дисплей;

display character generator-знакогенератор;

refresh rate – частота регенерації;

cathode ray tube – катодно-променева трубка, кінескоп;

a digitized image – цифрове зображення;

plasma display – плазменний дисплей;

pitch – інтервал, крок;

display resolution – роздільна здатність дисплею;

dot pitch – розмір точки (відстань між пікселями);

contrast ratio – коефіцієнт контрасту;

horizontal length – горизонтальна довжина;

vertical length – вертикальна довжина;

width – ширина;

2 Перекладіть текст на українську мову. (письмово)

HOW SCREEN DISPLAYS WORK

We interact with computers by entering instructions and data into them. After the information has been processed, we can see the results on the visual display unit or the monitor. In this interactive process with the computer, the screen plays an important part. The pictures and the characters we see on the screen are made up of picture elements which are also called pixels. The total number of pixels the display is divided in (both horizontally and vertically) is known as resolution. When the number of pixels is very large, we obtain a high resolution display and therefore a sharp image. If the number of pixels is small, a low resolution is obtained. Thus, pixel density or resolution affects the quality of the image: a larger number of pixels gives a much clearer image. The cathode ray tube of the monitor is very similar to that of a TV set. Inside the tube there is an electron beam which scans the screen and turns on or off the pixels that make up the image. The beam appears in the top left corner, and scans the screen from left to right in a continuous sequence, similar to the movement of our eyes when we read, but much faster.

In a colour monitor, the screen surface is coated with substances called phosphors. Three different phosphor materials are used — one each for red, green and blue. A beam of electrons causes phosphor materials to give coloured light from which the picture is formed. Colour monitors are capable to display many different colours at the same time. Portable computers use a flat liquid-crystal display (LCD) instead of a picture tube.

3 Дайте відповіді на запитання (письмово)

1. What is a monitor? 2. What is called display resolution? 3. What affects the quality of the image? 4. How does the cathode ray tube work?

4 З’єднайте терміни з визначеннями (письмово)

1) phosphors a) the frequency at which a monitor renews its image, measured in Hz

2) LCD screen b) a flat-panel display which works by emitting light through a special

liquid

3) pixel c) the space between a display's pixels

4) dot pitch d) the smallest element in a displayed image

5) refresh rate e) materials that emit light and produce colours when they are activated by an electron beam

5 Перекладіть текст на українську мову. (письмово)

1) `I sometimes use a video projector in my Geography lessons. I prepare audiovisual presentations on my laptop and then connect it to a front-screen projector which displays the images on a distant screen or white wall.

2) `I’ve got a 52-inch plasma display and really enjoy its advantages: high-contrast images and bright colours, generated by a plasma discharge which contains noble, non-harmful gases. Gas-plasma TVs allow for larger screens and wide viewing angles, perfect for movies!'

3) `I use a portable DLP projector for my business presentations. This is a digital light – processing device which creates the image with millions of microscopic mirrors arranged on a silicon chip.`

4) ` I am a home cinema enthusiast. I’ve set up a system with a DVD recorder, speakers for surround sound, and a rear projection TV, which has the video projector and the screen within a large TV box. It’s a real cinema experience.`

6 Заповніть пропуски відповідними словами із тексту у вправі 5. (письмово)

1. If you intend to set up a h… c… , consider getting a very big screen, a DVD recorder and a good set of speakers. 2. A f… - s… p… takes digital images and displays them on a screen or wall. 3. The company announced plans to expand its d… l… - p… (DLP) cinema technology, which has thrilled test audiences with its dazzling colours and pin-sharp images. 4. In a r… p… TV, a large box contains both the projector and the screen built in. 5. The gas mixture in a p… d… is not dangerous.

7 Знайдіть Compound Adjectives, що відповідають визначенням (письмово)

1. A … - … telephone allows people with limited mobility to dial and answer the phone with just the sound of their voice. 2. A fax machine is a … - … device, so it doesn’t require any other device to function. 3. A … - … application is operated by making choices from menus instead of giving instructions on a keyboard. 4. In some countries it is obligatory to use a … - … car kit when you are using a mobile phone while driving. 5. An … - … language like C++ lets the programmer concentrate on individual units (e.g. a piece of text, a graphic or a table) and give each object functions which can be changed easily. 6. They've launched a new … - … computer, an entire PC embedded inside a keyboard.