Philips 170T4FS Инструкция по эксплуатации онлайн [46/122] 42121

FAQs (Frequently Asked Questions)

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 optimise 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 CDT. Usually, the viewing angle refers to the point where

the contrast ratio 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?

A: Technically speaking, LCDs do flicker, but the cause of the phenomenon is different from that of

a CRT monitor -- and it has no impact of the ease of viewing. Flickering in an LCD monitor relates to

usually undetectable luminance caused by the difference between positive and negative voltage. On

the other hand, CRT flickering that can irritate the human eye occurs when the on/off action of the

fluorescent object becomes visible. Since the reaction speed of liquid crystal in an LCD panel is

much slower, this troublesome form of flickering is not present in an LCD display.

Q: Why is an LCD monitor virtually free of Electro Magnetic Interference?

A: Unlike a CRT, an LCD monitor does not have key parts that generate Electro Magnetic

Interference, especially magnetic fields. Also, since an LCD display utilizes relatively low power, its

power supply is extremely quiet.

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