FAQs (Frequently Asked Questions)

display can be switched on and off more frequently, improving the screen refresh time (your mouse pointer will appear to move more smoothly across the screen, for example). The passive matrix LCD has a grid of conductors with pixels located at

each intersection in the grid.

Q:What are the advantages of TFT LCD compared with CRT?

A:In a CRT monitor, a gun shoots electrons and general light by colliding polarized electrons on fluorescent glass. Therefore, CRT monitors basically operate with an analog RGB signal. A TFT LCD monitor is a device that displays an input image by operating a liquid crystal panel. The TFT has a fundamentally different structure than a CRT: Each cell has an active matrix structure and independent active elements. A TFT LCD has two glass panels and the space between them is filled with liquid crystal. When each cell is connected with electrodes and impressed with voltage, the molecular structure of the liquid crystal is altered and controls the amount of inlet lighting to display images. A TFT LCD has several advantages over a CRT, since it can be very thin and no flickering occurs because it does not use the scanning method.

Q:Why is vertical frequency of 60Hz optimal for an LCD monitor?

A:Unlike a CRT monitor, the TFT LCD panel has a fixed resolution. For example, an XGA monitor has 1024x3 (R, G, B) x 768 pixels and a higher resolution may not be available without additional software processing. The panel is designed to optimize the display for a 65MHz dot clock, one of the standards for XGA displays. Since the vertical/horizontal frequency for this dot clock is 60Hz/48kHz, the optimum frequency for this monitor is 60Hz.

Q:What kind of wide-angle technology is available? How does it work?

A:The TFT LCD panel is an element that controls/displays the inlet of a backlight using the dual-refraction of a liquid crystal. Using the property that the projection of inlet light refracts toward the major axis of the liquid element, it controls the direction of inlet light and displays it. Since the refraction ratio of inlet light on liquid crystal varies with the inlet angle of the light, the viewing angle of a TFT is much narrower than that of a CRT. Usually, the viewing angle refers to the point where the contrast ration is 10. Many ways to widen the viewing angle are currently being developed and the most common approach is to use a wide viewing angle film, which widens the viewing angle by varying the refraction ratio. IPS (In Plane Switching) or MVA (Multi Vertical Aligned) is also used to give a wider viewing angle.

Q:Why is there no flicker on an LCD Monitor?

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Philips 220XI user manual What are the advantages of TFT LCD compared with CRT?
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220XI specifications

The Philips 220XI is a versatile and innovative display that has been making waves in the world of professional monitors. Designed with attention to detail and user-centric features, the 220XI is an excellent choice for creatives, gaming enthusiasts, and professionals requiring high-quality visual output.

One of the standout features of the Philips 220XI is its stunning visual performance. It boasts a 21.5-inch Full HD (1920 x 1080) resolution that ensures crisp and vibrant images. The display utilizes an IPS (In-Plane Switching) panel which provides wide viewing angles, allowing colors to remain consistent and true to life, whether you're viewing the screen from the side or directly in front. This characteristic makes it ideal for collaborative work environments where multiple users are viewing the screen simultaneously.

Color accuracy is another hallmark of the Philips 220XI. It covers 100% of the sRGB color gamut, which brings out vivid colors and enhances the overall viewing experience. This feature is especially beneficial for graphic designers and photographers who rely on accurate and true-to-life color representation for their projects.

In terms of connectivity, the Philips 220XI is equipped with multiple ports including HDMI, VGA, and DisplayPort, ensuring compatibility with a wide range of devices. The monitor also supports MHL (Mobile High-Definition Link), which allows users to link their mobile devices directly to the screen for a larger display of their content.

The monitor’s ergonomic design is another notable characteristic. It features a slim bezel design that maximizes the screen estate, thus providing a more immersive viewing experience. Moreover, its adjustable stand allows users to tilt, swivel, and adjust the height of the monitor for optimal comfort, reducing strain during long hours of usage.

For those concerned about eye health, the Philips 220XI includes features such as LowBlue Mode and Flicker-Free technology, which aim to reduce eye fatigue during extended screen time.

In summary, the Philips 220XI combines superb image quality, extensive connectivity, ergonomic design, and features aimed at eye comfort, making it a well-rounded option for a variety of users. Whether for work or play, the Philips 220XI sets a high standard in the monitor market.
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