Philips 150E6 user manual Return to TOP

Page 32

FAQs (Frequently Asked Questions)

does not use the scanning method.

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

A:Unlike a CDT 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 CDT. 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?

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

RETURN TO TOP OF THE PAGE

file:///D/My%20Documents/dfu/150E6FB/ENGLISH/150e6/SAFETY/saf_faq.htm (7 of 8)2005-05-27 9:26:41 AM

Page 31 Page 33
Image 32
Page 31 Page 33
Contents Philips LCD Monitor Electronic User’s Manual Safety and Troubleshooting Information Safety precautions and maintenanceService About This Guide Notational DescriptionsReturn to TOP Product Features Technical SpecificationsProduct Information 150E6Video Resolution & Preset Modes Automatic Power SavingPhysical Specifications Pin AssignmentProduct Views Physical FunctionTilt Installing Your LCD Monitor Front View Product DescriptionOptimizing Performance OSD Tree On-Screen DisplayDescription of the On Screen Display Return to TOP Page Customer Care & Warranty Glossary Energy Star Computers Programme USB or Universal Serial Bus Device Vertical refresh rate Download and Print Installing FPadjust Program Page FAQs Frequently Asked Questions General FAQsFAQs Frequently Asked Questions Screen Adjustments Compatibility with other Peripherals LCD Panel Technology What are the advantages of TFT LCD compared with CRT? Return to TOP Ergonomics, Ecology and Safety Standards Common Problems Imaging ProblemsTroubleshooting Return to TOP Regulatory Information Recycling Information for CustomersEnergy Star Declaration End-of-Life DisposalInformation for UK only EarthedReturn to TOP Information for Users in the U. S Information for Users outside the U.SPhilips Pixel Defect Policy Philips Flat Panel Monitors Pixel Defect PolicyProximity of Pixel Defects Black DOT Defects Acceptable Level Connecting to Your PC Connecting to Your PCAccessory Pack Return to TOP Base Unfold and Fold the Base Unfold the BaseRemove the Base Condition Return to TOP For Windows For Windows MeFor Windows XP Dialog box Your Philips F1rst Choice WarrantyCanada/USA Before Requesting Service To GET Warranty Service in Canada Just a phone call away Your International Guarantee Page Belarus BulgariaCzech Republic CroatiaEstonia HungaryLatvia LithuaniaSlovakia SloveniaPoland RussiaUkraine AntillesArgentina BrasilColombia MexicoParaguay PeruUruguay VenezuelaCanada AustraliaNEW Zealand BangladeshChina Hong KongIndia IndonesiaKorea MalaysiaPakistan PhilippinesSingapore TaiwanThailand MoroccoSouth Africa DubaiF1rst Choice Contact Information
Top Page Image Contents