InFocus Genesis P130, Руководство по введению, Страница: 62 / 82

62 InFocus Corporation — Introduction Guide - DLP Multimedia Projector
Term Description
OEM Original Equipment Manufacturer. A company that gathers components from other manufacturers
and sells under their own name. An OEM version of a product is supported by the seller, not the
actual manufacturer.
Ohm Measure of electrical resistance, inductance or reactance.
OLED Organic Light Emitting Diode. A self-illuminating, energy-efficient, direct-view imaging system. Uses
an organic film sandwiched between 2 transparent electrodes.
Operate 24/7 Projectors that are identified as "Operate 24/7" means that the projector can operate continuously
without a need to shutdown other than for maintenance.
Optical Digital
Cable
Transfers digital signals as light pulses. Also called fibre-optic cable and is commonly used to send
surround sound from a player to a receiver/decoder.
Optional
Lenses
Typically the less expensive projectors come with a built-in lens that is designed to serve a specific
type of setting or application. A projector that supports optional lenses can address a wide variety of
installation needs. This gives a projector great flexibility at an incremental cost.
OSD On Screen Display. Menu shown on display device screen allowing display adjustment without
having dedicated physical controls such as knobs or buttons for each adjustable parameter.
Oversampling Multiplies outgoing signal samples in order to more easily filter out aliased sounds but doesn’t create
fidelity that isn’t there to begin with.
Overscan Given as a percentage or pixel count, the amount that a particular display device crops the edges of
an incoming video signal. This is done to ensure the image area contains only picture information.
Pan-and-Scan A method to fit source material of a different resolution or aspect ratio onto another. Sometimes
used with computer input when the input resolution exceeds the resolution of the display device.
Used extensively for broadcast and DVDs, it simply crops the sides of widescreen material and the
transfer operator chooses the best part of the frame to show. Often an electronic camera pan is used
to change the area being shown. This is used when characters are talking to each other but one is off
screen due to cropping and they become the focus of the shot.
PC 3D Ready A projector that is PC 3D Ready can accept a 120Hz frame-sequential 3D signal from a computer
via either NVIDIA's 3D Vision system or one of several educational software suites. These projectors
are not compatible with the HDMI

1.4 3D specification used on 3D Blu-ray players and set-top boxes.
This type of projector is also refered to as 3D Ready.
Persistence of
Vision
The disposition of humans to amalgamate sequential still images into perceived motion. For most
people, this occurs at around 16 fps.
Phase The characteristic of when a wave is at its peak, trough, or zero point going up or down. Measured in
degrees. Two sine waves of the same frequency that are 180 degrees out of phase will cancel each
other out, yielding no signal.
Pico Projector A marketing term to describe a small hand held projector that can fit in your pocket. A pico projector
can be a stand-alone device that connects to a computer or other video device or a projection
module that is integrated with a phone, portable computer, MP3 player or other small device.
Picture-in-
picture
The ability of a projector (or any video display device) to display two independent video signals at
once. One signal usually fills the main screen and the other is displayed in an inset window. Usually
the audio from the image on the main screen is the default, and no audio is available on the inset
picture.
Poly-Si (silicon)
LCD
One of several projector display technologies. Monochrome Poly-Si LCDs are typically placed in
each of the three colour (red, green, blue) light paths inside a projector to produce a colour image
from a common light source. Poly-Si technology is a bit faster than the Active Matrix TFT providing
slightly smoother video.
Glossary