Specifications

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Glossary of “Touch” Terms and Related Technical Terminology
passive matrix
See LCD.
phosphor
Chemical compound that emits light when excited by
electrons.
pixel
Abbreviation for picture element, the smallest element of the
picture that can be displayed on the screen. Each pixel
contains one red, one blue, and one green phosphor.
PDF file (Adobe
®
Portable Document Format)
A universal file format that preserves the fonts, formatting,
colors, and graphics of any source document, regardless of
the application and platform used to create it. PDF is the open
de facto standard for distributing formatted documents over
the Internet. PDF files are compact and can be shared, viewed,
navigated, and printed using free Adobe Acrobat® Reader®
software, downloadable from http://www.adobe.com.
Documents can be converted into PDF files with Adobe
Acrobat software.
point of information (POI)
The location at a facility where visitors seek information.
point of sale (POS)
The location at a merchant’s facility where customers make
purchases.
POS terminal
A device placed in a merchant location, connected to the
bank’s system or authorization service provider via telephone
lines, and designed to authorize, record, and forward data for
each sale by electronic means.
RAM
Random access memory. In technical references, this is often
simply referred to as memory. A computer’s memory is not
like its hard disk, which is permanent storage. Memory can
only store information while the computer is on; however, it is
much faster than a hard disk. A hard disk is a mechanical
device, but memory is stored on computer chips, and
information can be accessed from anywhere on the chip
almost instantly.
refresh rate
Number of times the screen can be redrawn per second—an
ergonomic issue directly related to long-term ease of use. A
higher refresh rate means a less "flickering" display, resulting
in less eyestrain and fatigue. Bandwidth, horizontal scanning
rate, and vertical scanning rate work together to determine
both the resolution and the refresh rate.
resolution
The number of pixels that can be displayed on a screen,
specified as the number of pixels in a horizontal line
multiplied by the number of horizontal lines. For example, a
resolution of 800 x 600 is 800 pixels running horizontally and
600 pixels running vertically—a total of 480,000 pixels.
RF
Radio frequency. It consists of electromagnetic waves at a fre-
quency between audio and infrared, used primarily in radio
and television transmission.
RFI
Radio frequency interference. This interference in the opera-
tion of a device is caused by incompatibility with ambient RF
signals. See also EMC, EMI, and RF.
RS-232 port
A standardized serial port for connecting a computer to
peripheral equipment, such as a printer, mouse, scanner,
modem, or touchscreen.
screen size versus viewable image size
Screen size is the total size, measured diagonally, of the
monitor screen before it is placed in the monitor cabinet.
Viewable image size is the size, measured diagonally, of the
monitor screen that can be viewed once it is in the cabinet.
stripe pitch
The equivalent of dot pitch on aperture grille tubes—the
distance between one stripe and the next one of the same
color, expressed in millimeters.
TCO95 and TCO99
A standard set by the Swedish Tjänstemännens Central
Organization (TCO) in 1991. It is even more stringent than
MPR II, especially for alternating electric fields (AEF). Not
only are the permitted field levels reduced compared with
MPR II, but the measuring distance is reduced as well.
Ergonomic and ecologic requirements are included for
TCO95. For TCO99, it is expanded to include more ergonomic
and ecologic requirements. See also MPR II.
TFT
Thin film transistor. See LCD.
tilt
The angle of the CRT with respect to the horizontal-mounting
bracket of the chassis. Tilt can vary, depending on the
monitor’s orientation to the earth’s magnetic poles. Monitor
manufacturers orient and align their products in the eastern
direction. When the monitor is facing a north/south direction,
there may be a slight rotation of the image.
UL/cUL Listed
End products can be Listed by Underwriters Laboratories for
expected safety concerns. The CNL/USL designation
idesignation in the certification indicates evaluation to U.S.
and Canadian standards. Typical end products are
touchscreens, controllers, and kiosk touchmonitors.