Hyppigt stillede spørgsmål (FAQs)

Sv.: Forestil dig USB som et intelligent stik til PC periferiudstyr. USB genkender automatisk de ressourcer, der kræves af periferienheden (såsom driversoftware og bussens båndbredde). USB stiller de nødvendige ressourcer til rådighed, uden at brugeren skal gribe ind. Der er tre hovedfordele ved USB. USB eliminerer ' kabinetskræk' – angsten for at fjerne computerens kabinet for at installere ekstra kort

der ofte kræver justering af komplicerede IRQ-indstillinger – til add-on- periferiudstyr. USB afskaffer "port gridlock."-begrebet Uden USB er PC’er normalt begrænset til en enkelt printer, to Com port-enheder (normalt en mus og et modem), en udvidet parallelportenhed (for eksempel scanner eller videokamera) og en joystick. Der kommer stadigt flere periferienheder til multimediecomputere på markedet hver dag.

Med USB kan op til 127 enheder køre samtidigt på en computer. USB tillader "hot plug-in." Det er ikke nødvendigt at lukke computeren, sætte stikket i, genstarte og køre et installationsprogram for at installere periferiudstyr. Og man skal ikke gå gennem den modsatte procedure for at frakoble en enhed. Konklusion: Kort sagt forvandler USB det, vi kender som "Plug-and-Pray" til sandt Plug-and-Play!

Se i ordlisten for flere oplysninger om USB.

Sp.: Hvad er en USB-hub ?

Sv.: En USB-hub giver ekstra opkoblinger til USB'en. Upstream-porten på en hub forbinder den med værtsmaskinen, normalt en PC. Flere downstream-porte i en hub tillader forbindelse til en anden hub eller enhed såsom et USB-tastatur, et kamera eller en printer.

Sp: Hvad kan jeg gøre, hvis mine USB enheder ikke virker med USB hubben på min computer?

Sv: Hvis du oplever det problem, afmonterer du bare USB kablet mellem din PC og din skærm og monterer det igen, derefter opdaterer din PC enhedshåndtering (Start > Indstillinger > Kontrolpanel > System > Hardware > Enhedshåndtering > Opdater) eller genstarte din Pc og problemet kan løses med ovenstående procedurer.

TILBAGE TIL TOPPEN AF SIDEN

LCD-panelteknologi

Sp.: Hvad er et LCD- eller flydende krystal-display?

Sv.: Et LCD (Liquid Crystal Display) er en optisk enhed, der normalt benyttes til at vise ASCII-tegn og billeder af digitale objekter som ure, regnemaskiner, bærbare spil osv. LCD er den teknologi, der anvendes til displays i notebooks og andre små computere. Som lysdiode- og plasmateknologierne gør LCD det muligt at lave meget tyndere skærme end katoderørs- også kaldet CRT (cathode ray tube)-teknologi. LCD- skærme bruger meget mindre strøm end LED- og plasmaskærme, fordi de fungerer efter et princip, der blokerer lys i stedet for at udsende det.

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Philips 170x7 user manual Sp. Hvad er en USB-hub ?, Sp. Hvad er et LCD- eller flydende krystal-display?

170x7 specifications

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