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Comparing CRT and LCD Monitors: Features, Data Transfer Methods, and Screen Technology

Discover the differences between CRT and LCD monitors, from electron beams in CRT to liquid crystal displays in LCDs. Learn about video cards, data transfer methods, and the features of flat screen monitors like LCD and plasma screens. Compare picture quality, power usage, screen burn-in, pixel levels, and size benefits of both technologies.

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Comparing CRT and LCD Monitors: Features, Data Transfer Methods, and Screen Technology

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  1. Types of monitors • CRT • Cathode Ray Tube • LCD • Liquid Crystal Display

  2. CRT • The filaments at the back of the cathode tube shoot a beam of electrons to the screen at the front of the tube • This screen is coated with phosphor that glows when struck by the electron beam.

  3. LCD • An LCD panel produces an image using a liquid crystal material made of large, easily polarized molecules

  4. Features of a monitor

  5. Video cards • Interface between the monitor and the computer. • Also called graphic adapters, video boards, graphics cards, or display cards. • Sometimes the video controller with a video port is integrated into the motherboard.

  6. Video card

  7. Methods of data transfer • RGB video port • standard method of passing three separate signals for red, green, and blue which most video cards and CRT monitors use. • uses a regular 15-pin Super VGA port

  8. Methods of data transfer • DVI port - Digital Visual Interface port • digital interface standard used by digital monitor such as a digital flat panel monitor, and digital TVs (HDTV). • for a video card that only has a DVI port, you can purchase a VGA converter so you can connect a standard VGA cable to use a regular analog monitor.

  9. Methods of data transfer • S-Video – Super Video • this method sends two signals over the cable, one for color and the other for brightness, and is used by some high end TVs and video equipments. • it uses a 4-pin round port

  10. Flat Screen Monitors LCD - Plasma • Picture Quality • Normal computing, both LCD and plasma screens will provide sharp and clear display • Watching Blu-Ray movies or playing high-definition games, Plasma screens have less picture lag and sharper color resolution than LCD displays.

  11. LCD - Plasma • Power Usage • LCDs use considerably less power than plasma displays, which use self-lighting pixels • Screen Burn-In • Plasma screens are more likely to experience screen burn-in (the screen becomes permanently discolored where the unchanging image was)

  12. LCD - Plasma • Pixel Levels • LCD screens generally have more pixels per square inch than plasma • makes them ideal if you are working with complex spreadsheet programs or editing software • Size • Plasma monitors are usually ahead of the curve regarding their maximum size • the biggest monitors are plasma

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