Specifications

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Glossary of “Touch” Terms and Related Technical Terminology
DPMS
Display Power Management Signaling. A VESA standard
that ensures that monitor and video card manufacturers
produce power-saving products that work together.
drive
Any data storage device including CD-ROM drive, floppy
disk drive, and hard disk drive.
EDID
Extended Display Identification Data. A VESA standard for
data structures containing the display identity and the basic
display specifications.
electronic radiation standards
International standards established to limit electromagnetic
emissions from monitors. There are currently two important
standards, both derived from regulations originally
established by the Swedish authorities. See also MPR II
and TCO.
EMC
Electromagnetic compatibility. EMC requirements stipulate
that a device shall not cause interference within itself or in
other devices, or be susceptible to interference from other
devices. The European Union was the first governing body
to establish laws (CE) regarding immunity of devices from
EMI. See also CE, EMI, and RFI.
EMI
Electromagnetic interference. This interference in the opera-
tion of a device is caused by incompatibility with ambient
signals. Common sources of EMI include transmitters and
receivers (radio, TV, cell phone), power mains (lightning,
surges, brownouts), appliances, computer oscillators, and
electrostatics. Many countries have established laws (such
as FCC and CE) governing EMI source limits. See also CE,
FCC, EMC, and RFI.
ENERGY STAR
®
A voluntary partnership between the U.S. Department of
Energy, the U.S. Environmental Protection Agency, product
manufacturers, local utilities, and retailers. ENERGY STAR
labeled products use less energy than other products.
Partners help promote energy-efficient products by labeling
with the ENERGY STAR logo and educating consumers
about the benefits of energy efficiency.
FCC Class A
A marking FOR OFFICE USE means the design has been
tested for compliance with the U.S. Federal
Communications Commission’s (FCC) Part 15 Class A RF
emissions limits, and is suitable for use in nonresidential
settings. Industry Canada’s RF emissions limits are
identical to the FCC’s. See also IC Class A.
FCC Class B
A marking FOR HOME OR OFFICE USE means the design
has been tested for compliance with the U.S. Federal
Communications Commission’s (FCC) Part 15 Class B RF
emissions limits, and is suitable for use in residential or
nonresidential settings. Industry Canada’s RF emissions
limits are identical to FCC’s. See also IC Class B.
flat square screen
A screen that is flatter and more square than the
conventional CRT screen. The flatter outline reduces picture
distortion and ambient reflections, and allows better use to
be made of the screen area.
flicker
Condition of the display caused by the mismatch of vertical
and horizontal refresh rates, when a phosphor’s illumination
begins to decay prior to being refreshed. The resulting
flicker is particularly detectable with peripheral vision.
Flicker can be eliminated by increasing the refresh rate to a
value at or above 70 Hz.
frequently asked question(s) (FAQ)
A list of questions/answers provided by companies related
to their products or Web site.
GS
A German certification, Geprufte Sicherheit ("tested safety").
End products can be GS-certified by TUV for expected
safety concerns, meaning they have been evaluated and
have met German standards. Typical end products are
desktop touchmonitors.
hard disk
A storage device inside a computer, generally designated as
the C: drive. It cannot be seen without opening up the
computer; however, usually a light on the front of the
computer shows when the hard disk is being accessed.
hertz
The unit of frequency named after the physicist Heinrich
Hertz (1857–1894). One hertz (Hz) is equal to one
cycle/second.
horizontal frequency
The time it takes to scan each of the horizontal lines that
make up the display, measured in kilohertz (kHz).
Horizontal frequency is directly related to the vertical
refresh rate, so that the greater the number of vertical lines,
the higher the horizontal frequency required.
horizontal scanning frequency
The number of video lines written on the screen every
second (from left to right); also called line frequency and
expressed in kHz. The higher the horizontal scanning
frequency, the higher the resolution and/or the refresh rate,