Philips 190B9CS/05 Electronic User's Manual

Also see for 190B9 - Brilliance - 19" LCD Monitor: User manual Electronic user's manual

Contents

of removing the computer case to install circuit board cards -- that often requires adjustment ofcomplicated IRQ settings -- for add-on peripherals. USB does away with "port gridlock." Without USB,PCs are normally limited to one printer, two Com port devices (usually a mouse and modem), oneEnhanced Parallel Port add-on (scanner or video camera, for example), and a joystick. More and moreperipherals for multimedia computers come on the market every day. With USB, up to 127 devices canrun simultaneously on one computer. USB permits "hot plug-in." No need to shut down, plug in, rebootand run set up to install peripherals. No need to go through the reverse process to unplug a device.Bottom line: USB transforms today's "Plug-and-Pray" into true Plug-and-Play!Please refer to glossary for more information about USB.Q: What is a USB hub ?A: A USB hub provides additional connections to the Universal Serial Bus. A hub's upstream portconnects a hub to the host, usually a PC. Multiple downstream ports in a hub allows connection toanother hub or device, such as a USB keyboard, camera or printer.RETURN TO TOP OF THE PAGELCD Panel TechnologyQ: What is a Liquid Crystal Display?A: A Liquid Crystal Display (LCD) is an optical device that is commonly used to display ASCIIcharacters and images on digital items such as watches, calculators, portable game consoles, etc. LCDis the technology used for displays in notebooks and other small computers. Like light-emitting diode andgas-plasma technologies, LCD allows displays to be much thinner than cathode ray tube (CRT)technology. LCD consumes much less power than LED and gas-displays because it works on theprinciple of blocking light rather than emitting it.Q: What differentiates passive matrix LCDs from active matrix LCDs?A: An LCD is made with either a passive matrix or an active matrix display grid. An active matrix has atransistor located at each pixel intersection, requiring less current to control the luminance of a pixel. Forthis reason, the current in an active matrix display can be switched on and off more frequently, improvingthe screen refresh time (your mouse pointer will appear to move more smoothly across the screen, forexample). The passive matrix LCD has a grid of conductors with pixels located at each intersection inthe grid.