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Comparing LCD Monitors and CRT Monitors.

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Introduction

Comparing LCD Monitors and CRT Monitors Over the past few years, LCD monitors have made significant advances in the market to emerge as a strong competitor to traditional Cathode Ray Tube (CRT) monitors. Now, large monitor manufacturers like Sony are even planning to phase out CRT manufacturing and concentrate on widening their LCD offerings. So, has LCD won the competitive battle? Perhaps not yet, as CRT monitors still hold a few key advantages. Below I will summarize some of the differences of LCD monitors versus CRT monitors, and which holds the current advantage: Image Brightness: LCD Monitors easily win in this area, offering brightness approximately twice that as CRT monitors on average. This is particularly important for viewing in daytime, high light areas, like a room with many windows. LCD monitors will easily appear brighter than CRT monitors in these conditions. Contrast: LCD monitors have made great strides to narrow the gap on contrast. Contrast is important for viewing in low light situations and ensuring that black tones appear black (rather than muddy greys), and is most important for gaming and movie playback. Although CRT monitors pull of the victory, the margin of difference is now minor, with the best LCD monitors matching CRT monitors for most practical purposes. ...read more.

Middle

The very best LCD monitors now offer sub 20 millisecond response times, which makes them generally acceptable for gaming. CRTs of course still hold the advantage, since their response time is not noticeable. Screen Flickering: For those that spend a lot of time on a computer, one of the biggest issues leading to sore eyes and headaches is the screen flicker caused by CRT displays. Although screen flicker is generally not a problem for CRT displays that offer a 85 MHz screen refresh rate, many monitors do not, and default Windows settings are often lower as well. LCD monitors clearly are the better choice here, as there is no flicker at all as a result of the differences in technology. Magnetic Interference: LCD monitors have the advantage here, and are not affected by magnetic sources, namely speakers. As a result, some LCD monitors even offer integrated speakers, and do not require special shielding. CRT monitors are affected by the magnets in speakers, and depending on the model and closeness of the speaker, can result in a distorted picture. Power Consumption: Again, LCD vs. CRT, LCD comes out ahead. LCD monitors consume considerably less power than CRTs. ...read more.

Conclusion

One of the latest such advancements is TFT, or thin film transistors. TFT-LCDs make use of a very thin transistor that is applied to the glass during the manufacturing process. The TFT further acts as a switch, allowing control of light at the pixel-level, greatly enhancing resolution and image sharpness. This has been particularly important for improving LCDs ability to display small-sized fonts. Other advances have allowed LCDs to greatly reduce liquid crystal cell response times. Response time is basically the amount of time it takes for a pixel to 'change colours'. In reality, response time is the amount of time it takes a liquid crystal cell to go from being active to inactive. Response time is described in milliseconds, with the best LCD monitors now coming in at 20 ms and less in response time. Older models often averaged 25-45 ms, leading to a blurring effect when the monitor displayed motion. Another key advancement for LCD monitors has been the improvement of contrast ratio. This has allowed LCD monitors to greatly improve colour reproduction, and now allows improved gaming and movie viewing. Many manufacturers are now also adding a specially designed low reflective coating that helps reduce glare, increase contrast, allows brilliant colour display. Unit 2: Hardware and Software Topic: Monitor Comparisons Page 1 of 2 ...read more.

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