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A property of certain projector lenses that allows light to be refracted in such a way
as to increase the quality of the projected image.
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A feature offered on select projectors that allows a user to connect additional monitors or projectors to the main unit.
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Produces extremely bright, white looking light.
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Display of several shades of one color, usually gray or magenta, in LCD equipment.
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The use of a projector or computer to integrate and present elements such as text, video, animation, and graphics.
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See Computer Projector.
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A projector, usually weighing between 7 and 20 lbs., that is light enough to be moved between different
departments or rooms, yet sturdy enough to be permanently mounted or installed.
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A system of units, composed of but not limited to projectors, computers, and/or PDAs, connected
together in order to share information.
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Consecutive lines of the displayed image are refreshed on each pass. No fading or flickering of screen
occurs with this method. Also known as progressive video.
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National Television Standards Committee. The television standard for North America, Japan, and
certain countries in South America. NTSC is 525 lines of resolution with a refresh rate of 60 Hz.
NTSC refers to a type of video or television signal.
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OverHead Projector. The required light source for use with LCD panels. They come in two varieties:
1) Reflective - Light source in the head and 2) Transmissive - light source in the bottom.
Transmissive OHP's are the only ones that can be used with LCD panels.
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Phase Alternate Line. The television standard for Western Europe, Asia, Australia, certain
countries in Africa and South America. PAL is 625 lines of resolution with a refresh rate of
50 Hz. PAL refers to a type of video or television signal.
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A flat presentation device that sits on top of an overhead projector. The overhead projector is
the light source for the panel. The panel is then plugged into the computer to project the
computer's image onto a wall or screen.
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A way to view an entire image that is intact but only a portion is shown at one time. The user must
pan left/right and up/down in order to view the entire image. This is used most often when the
digital zoom function is enabled on a multimedia projector.
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A curved screen surface that effectively traps the light from the projected image and reflects it back
to the audience with brilliant color and clarity.
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An LCD technology that uses pixels which are made up of RGB (Red, Green, Blue). Passive pixels
are at rest until activated by pulses of signals. Passive matrix has a slower response time causing
moving objects to streak or ghost unlike active matrix.
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Personal Computer Memory Card Interface Association. Also known as PC cards. PC cards are used
to connect peripherals, such as memory cards, I/O devices and hard disk drives to personal
computers. They come in three varieties: Type I, Type II and Type III.
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Personal Data Assistant. A handheld computing device used to store personal data.
Typically, these devices either use the Windows CE or Palm operating system.
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External device, such as a DVD player or printer, that works in conjunction with a projector or computer.
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A feature offered on select projectors allowing another window to be opened within a main presentation to view additional information.
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The smallest graphic unit that can be displayed on the screen, usually a single-colored dot.
Abbreviated term for "picture element."
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The display of an image where individual pixels become viewable and result in a jagged or
grainy appearance.
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A term used to indicate that a device can be installed with no setup (program installation, software
settings, etc.). Many devices require software, setting changes, or boot after installation. This is not
true of a plug and play device.
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A form of active matrix that uses three LCD panels. The transistors in Polysilicon TFT are smaller
(blocking less light) than the transistors in Amorphous TFT. This means that the panels in
Polysilicon TFT are smaller than the panel(s) in Amorphous TFT.
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A projector weighing less than 7 lbs.
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A presentation device that has its own light source built-in, sometimes called an all-in-one or
multimedia projector. Plug a computer and/or video player into the unit and project the computer
or video image onto a screen.
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Denotes software or hardware features that are unique to the product. Generally a
proprietary feature is created solely for the manufacturer and cannot be obtained from any other source.
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(a*a) +(b*b) = (c*c). Where "a" is the left or right, "b" is the top or
bottom and "c" is the diagonal. This equation is used to figure out the diagonal size
of the LCD glass, as well as the screen size of a projected image.
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