TV : What is it?
| Televisions, or simply known as TVs, are devices used for broadcasting, information-gathering, and entertainment purposes. They are a form of telecommunication system that receives motion pictures and sounds from a long distance. They are made with tuners that look for and receive available TV signals, converting them into an image and sound format that users can view and hear. They use different technologies to produce bright and clear images such as cathode ray tube (CRT), liquid crystal display (LCD), and plasma panels.
Televisions are among the popular devices people of all ages from different parts of the world utilize and appreciate. They have become an essential part of people's day-to-day living, as they provide relevant information and entertainment. |
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Kinds of TVs include the following: |
Screen types
Direct-view TVs
- Direct-view TVs are simply known as tube TVs.
- They are the most common types of televisions used in the world today.
- They are built with a large picture tube made of cathode ray that creates images every time an electron beam scans the back of a of a phosphor-coated screen.
- They produce sharp and bright images that can be viewed clearly in any room and under any lighting condition.
- They produce great pictures from any angle.
- They are heavy and bulky.
- They are very affordable and durable.
- Their screens can measure up to 40 inches.
Flat-panel TVs
- Flat panel TVs are sophisticated, super-slim units designed to be mounted on walls or stands.
- They produce crisp and bright images using plasma technology or liquid crystal display (LCD) panels.
- They provide outstanding resolution, contrast, and brightness ratio.
- Their screens can measure up to 61 inches.
- They are very expensive.
Rear-projection TVs
- Rear-projection TVs are designed with big screens that produce sharp and bright images when viewed in front.
- They produce dimmer images when viewed from the side or at a higher or lower angle.
- They are designed to be placed on top of tables and cabinets.
- They commonly use LCD technology to produce images.
- Their screens can measure up to 61 inches.
- They are very expensive.
Front-projection TVs
- Front-projection TVs are made up of two components: a screen and a projector.
- They usually feature a large but lightweight, and space-saving design, making them ideal for home theater systems.
- They produce clear images that are not as bright and crisp as smaller TV types.
- They are designed to function well in areas with reduced lighting or in total darkness.
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Screen size: To get crisp and life-like images, choose a TV with a standard screen size of 36 to 40 inches. A TV with a very small screen produce vivid pictures, but they are too small to project small, relevant details. A TV with a very large screen, on the other hand, usually produces detailed but blurry images.
Screen resolution: To get best resolution and detailed images, choose a high-definition LCD or a plasma TV with a resolution of 852 by 480. |
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