Philips HNB7190T user manual Why is there no flicker on an LCD Monitor?

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FAQs (Frequently Asked Questions)

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 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 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.

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Contents Philips LCD Monitor Electronic User’s Manual Maintenance Safety and Troubleshooting InformationSafety precautions and maintenance OperationService Return to TOPFAQs Frequently Asked Questions General FAQsWhat is the Auto function? How do I adjust the resolution?What if I get lost when I am making monitor adjustments? What does the Refresh Rate mean for LCD?QCan I change the color setting of my monitor? How should I clean the LCD surface?Will the LCD screen be resistant to scratches? Can the Philips LCD Monitor be mounted on the wall? Screen AdjustmentsWhat is the FPadjust program on the CD-ROM? How do LCDs compare to CRTs in terms of radiation?Compatibility with other Peripherals What is USB Universal Serial Bus?What is a USB hub ? Can I connect my LCD monitor to any PC, workstation or Mac?LCD Panel Technology What is a Liquid Crystal Display?What are the advantages of TFT LCD compared with CRT? Why is there no flicker on an LCD Monitor? What is the CE mark? Ergonomics, Ecology and Safety StandardsDoes the LCD monitor conform to general safety standards? Common Problems Imaging ProblemsVertical flicker appears Page Regulatory Information TCO03 InformationRecycling Information for Customers Waste Electrical and Electronic Equipment-WEEECE Declaration of Conformity Energy Star DeclarationFederal Communications Commission FCC Notice U.S. Only FCC Declaration of Conformity Commission Federale de la Communication FCC DeclarationEN 55022 Compliance Czech Republic Only Polish Center for Testing and Certification NoticeMIC Notice South Korea Only North Europe Nordic Countries Information VarningErgonomie Hinweis nur Deutschland Bsmi Notice Taiwan OnlyEnd-of-Life Disposal Information for UK only For customers in Canada and U.S.AReturn to TOP Information for Users in the U. S Other Related InformationInformation for Users outside the U.S About This Guide About This ManualNotational Descriptions Return to TOP Product Information Scanning Resolution & Preset Modes Automatic Power Saving Pin Assignment Product Views Swivel Height adjustment Return to TOP SmartManage SmartManage Features and BenefitsIntroduction Philips SmartControl Click Philips SmartControl tabSmartManage SmartManage SmartManage Return to TOP Philips Pixel Defect Policy Philips Flat Panel Monitors Pixel Defect PolicyModel Black DOT Defects Acceptable Level Installing Your LCD Monitor Front View Product DescriptionRear View Resolution Optimizing PerformanceConnecting to Your PC Connecting to Your PC Return to TOP Base Your LCD MonitorRemove the base ConditionReturn to TOP Getting Started For WindowsFor Windows Me For Windows XPReturn to TOP Description of the On Screen Display OSD TreePage Page Page Return to TOP Customer Care & Warranty North America Canada USAYour Philips F1rst Choice Warranty Thank you for purchasing this Philips monitorJust a click away Just a phone call away InformationPage F1rst Choice Contact Information United Kingdom 0207 949Your Guarantee in Central and Eastern Europe Just a click away Just a phone call away Bulgaria Consumer Information CentersBelarus Czech RepublicLatvia EstoniaHungary LithuaniaPoland SlovakiaSlovenia RussiaArgentina UkraineAntilles BrasilParaguay ColombiaMexico PeruCanada UruguayVenezuela AustraliaChina NEW ZealandBangladesh Hong KongIndia IndonesiaPakistan KoreaMalaysia PhilippinesThailand SingaporeTaiwan MoroccoSouth Africa DubaiYour International Guarantee Page Limited Warranty Computer Monitor Your Philips F1rst Choice WarrantyUSAClick here to access the Warranty Registration Card Before Requesting Service To GET Warranty Service in Canada Just a phone call away Amorphous silicon a-Si GlossaryActive matrix Aspect ratioCCFLcold cathode fluorescent light Color temperatureBrightness ChromaticityContrast ratio Digital Visual Interface DVIGrayscale IPS In Plane SwitchingGamma HueLuminance LCD liquid crystal displayLiquid crystal NitPolarizer PixelRefresh rate TFTthin film transistor USB or Universal Serial BusDevice Vertical refresh rate UpstreamDownload instructions Printing instructionsInstalling FPadjust Program To install FPadjust ProgramReturn to TOP

HNB7190T specifications

The Philips HNB7190T is an advanced home noise barrier system that integrates innovative technology with user-friendly design to enhance your living environment. This device is meticulously engineered to tackle different noise challenges in urban and suburban settings, ensuring a peaceful and serene atmosphere in homes.

One of the standout features of the HNB7190T is its state-of-the-art noise cancellation technology. Utilizing Active Noise Cancellation (ANC), this system employs microphones to capture ambient sounds and generate counter-frequencies, effectively neutralizing unwanted noise. This allows homeowners to enjoy their favorite activities, whether it’s relaxing, working from home, or sleeping, without interference from external disturbances.

In addition to ANC, the HNB7190T incorporates passive sound insulation features. The device is built with high-density materials that not only absorb sound waves but also prevent external noise from entering the living space. This dual approach of combining both active and passive techniques ensures a comprehensive noise reduction solution, making it highly effective in busy areas.

Another remarkable aspect of the Philips HNB7190T is its smart technology integration. The system can be easily controlled through a dedicated app, allowing users to customize noise cancellation levels and monitor ambient sound conditions in real-time. The app also provides insights into the effectiveness of noise reduction, enabling users to make informed adjustments based on their specific needs.

The design of the HNB7190T is sleek and modern, fitting seamlessly into various home decors. It is compact yet powerful, making it suitable for different spaces, whether you reside in a small apartment or a larger home. Additionally, the device is eco-conscious, designed with energy efficiency in mind, ensuring low power consumption while delivering high-quality performance.

The Philips HNB7190T has been recognized for its user-centric approach, boasting an intuitive interface that even non-tech-savvy individuals can navigate with ease. The system includes a comprehensive user manual and a dedicated customer support service, providing assistance whenever needed.

In summary, the Philips HNB7190T stands out for its effective noise cancellation capabilities, smart technology, user-friendly design, and eco-friendly features. This home noise barrier system is an ideal investment for anyone looking to improve their living quality by reducing unwanted noise and enhancing comfort within their home.
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