Elo Touch CarrollTouch Mounting and Environments Guide
ModularFlatPanel
Mountingand
Environments
Guide
CARROLLTOUCH
TOUCHPRODUCTS
ancompanyAMP
Modular Flat
Modular Flat
Panel Mounting
Panel Mounting
and Environments
and Environments
Guide
Guide
CARROLL TOUCH
TOUCH PRODUCTS
an AMP company
November 1996
Copyright
Copyright ©1996 Carroll Touch. All rights reserved.
Disclaimer
Carroll Touch has a policy of continually improving products as new
technology becomes available. Carroll Touch reserves the right to make
changes and improvements to the specifications of this equipment at any
time without notice.
Carroll Touch has made every attempt to ensure that the information in
this document is accurate and complete. Carroll Touch assumes no
liability for any damages that result from the use of this manual or the
equipment it documents. Carroll Touch reserves the right to make
changes to this document at any time without notice.
Trademarks
All brand and product names are trademarks or registered trademarks of
their respective holders.
CARROLL TOUCH Table of Contents
Table of Contents
Welcome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
Conventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Technological Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Environmental Factors. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Shock and Vibration . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Chemicals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Moisture. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Ambient Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Particulates. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Application Environments. . . . . . . . . . . . . . . . . . . . . . . . . 1-6
2. Mounting Techniques . . . . . . . . . . . . . . . . . . . . . . 2-1
Simplest Mounting Method. . . . . . . . . . . . . . . . . . . . . . . . 2-2
Typical NEMA4 Mounting Method . . . . . . . . . . . . . . . . . 2-3
Anti-Shock/Vibration Mounting Method . . . . . . . . . . . . . 2-5
Industrial or Medical Mounting Method . . . . . . . . . . . . . . 2-6
3. Bezel/Filter Assembly . . . . . . . . . . . . . . . . . . . . . . . 3-1
Component Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Polycarbonate Chemical Resistance . . . . . . . . . . . . . . . . . 3-2
4. Sealing and Coating . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Sealing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Coating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .GL-1
Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IN-1
i
Table of Contents CARROLL TOUCH
List of Figures
Figure 1-1. Scanning Infrared Technology . . . . . . . . . . . . . . . . . . 1-2
Figure 1-2. Modular Flat Panel Touch System Components . . . . 1-3
Figure 1-3. Mounting to Prevent Moisture Accumulation . . . . . . 1-5
Figure 2-1. Simplest Mounting Method (Front View) . . . . . . . . . 2-2
Figure 2-2. Simplest Mounting Method (Side View) . . . . . . . . . . 2-3
Figure 2-3. Typical NEMA4 Mounting Method (Front View) . . 2-4
Figure 2-4. Typical NEMA4 Mounting Method (Side View) . . . 2-5
Figure 2-5. Anti-Shock/Vibration Mounting Method . . . . . . . . . 2-6
Figure 2-6. Industrial or Medical Mounting Method . . . . . . . . . . 2-7
Figure 4-1. Modular Flat Panel Touch System Sealing . . . . . . . . 4-2
List of Tables
Table 1-1. Environmental Light Strengths . . . . . . . . . . . . . . . . . . 1-5
Table 1-2. Application/Operating Environments . . . . . . . . . . . . . 1-6
Table 3-1. Effects of Chemical Classes on Polycarbonates . . . . . 3-3
ii
WelcomeWelcome
A
s computers become a part of daily life, a technology that makes
them easier to use has become a necessity. Carroll Touch provides
the solution through the power of touch.
Because pointing or touching is a natural means of indicating choice,
touch systems are ideal for selection-based applications where
easy-to-follow menus guide a user through a series of steps or choices.
Touch is well accepted by the casual user because its simple, natural
interface hides the complexity of computer systems.
Purpose
The modular flat panel touch system is especially well-suited to rugged
environments, such as industrial settings where exposure to chemicals
is likely, medical settings where the system must be scrubbed after
every use, and public settings (such as kiosks) that subject the system
to repeated, possibly abusive use.
Thank you for your interest in Carroll Touch products!
This guide explains the operation of a scanning infrared (IR) touch
system and reviews the types of mounting, sealing and coating
techniques to adapt an IR touch system to various environmental and
chemical factors.
Modular Flat Panel Mounting and Environments Guide iii
Welcome CARROLL TOUCH
Audience
This guide is intended for analysts who need to determine how to use
and/or adapt an infrared scanning touch system to the needs of their
particular application.
Organization
Chapter 1, “Introduction,” contains a brief technological overview of
the ways in which scanning infrared touch systems function. The
chapter goes on to list environmental factors affecting touch, such as
temperature, ambient light, chemicals, particulate contaminants,
moisture, shock and vibration.
Chapter 2, “Flat Panel Mounting Techniques,” illustrates four separate
mounting schemes, each of which is designed to increase the
functionality of the touch system in reaction to a different environment.
The mounting methods include simple, typical NEMA/4,
anti-shock/vibration, and industrial/medical.
Conventions
Chapter 3, “Bezel/Filter Assembly,” shows the modular flat panel bezel
and filter and its standard manufacturing material, along with its
chemical properties.
Chapter 4, “Sealing and Coating,” discusses the concept of sealing,
along with an explanation of how to seal the modular flat panel touch
system. The concept of coating and reasons for it are explained, along
with Carroll Touch conformal coating.
The Glossary defines terms that are unique or whose usage is unique to
touch.
For clarity, this guide uses certain conventions to visually distinguish
different types of information. The conventions are:
• Bold is used to emphasize a word or phrase, including definitions
of important concepts.
• Information of particular importance or actions that may have
undesirable results if performed improperly are included under the
headings
Note and Caution.
iv Modular Flat Panel Mounting and Environments Guide
1
T
Introduction
Introduction
his chapter contains a brief technological overview of scanning
infrared touch systems and describes the environmental factors
that affect touch, such as temperature, shock and vibration, chemicals,
moisture, ambient light, and particulates. A brief analysis of the
environmental factors present in various locations is also included.
The topics covered include:
• Technological Overview.
• Environmental Factors.
• Application Environments.
Modular Flat Panel Mounting and Environments Guide 1-1
Chapter 1 - Introduction CARROLL TOUCH
Technological Overview
The operation of all scanning infrared (IR) touch systems is based on
the creation of a grid of IR light beams above the viewing surface of a
CRT monitor or flat panel display and the recognition of the location at
which individual beams within the grid are interrupted. To create such
a grid, IR light emitting diodes (LEDs) are paired with phototransistors,
each set constituting an opto-pair or physical beam, to create a
horizontal (x-axis) and a vertical (y-axis) array of beams. The two
arrays of beams and their circuitry make up an opto-matrix frame, as
shown in Figure 1-1.
Touch Activation Inside and Outside Edges of
Infrared-Transparent Bezel
Grid of Infrared Light Opto-Matrix Frame
Inside Bezel
Edge of Active
Display Area
Figure 1-1. Scanning Infrared Technology
As shown in Figure 1-2, a Carroll Touch modular touch frame designed
to function with a flat panel is composed of an opto-matrix frame, an
IR-transparent protective bezel, and a transparent filter. To complete
the touch system, the modular touch frame is linked to a modular touch
controller via the modular digital interface (MDI), which is a standard
8-pin telephone-type plug attached to the touch frame by an 8-pin cable.
1-2 Modular Flat Panel Mounting and Environments Guide
CARROLL TOUCH Chapter 1 - Introduction
Flat Panel DisplayFilterOpto-Matrix Frame
Bezel 8-Pin Telephone-
Type Cable
Figure 1-2. Modular Flat Panel Touch System Components
Environmental Factors
Traditionally, the successful implementation of a scanning IR touch
system has required that certain factors in the operational environment
be addressed. Historically, the environmental factors that could
influence the operation of a touch system were temperature, shock and
vibration, chemicals, moisture, ambient light, and particulate
contaminants (dust, dirt, etc.). Today’s Carroll Touch modular touch
systems with their improved hardware, software and firmware,
compensate for these environmental conditions, along with such factors
as misalignment or degradation of the opto-electronic devices, reducing
their ability to affect touch system operations.
Temperature
Carroll Touch’s use of solid state electronics and its ASIC-based
modular circuitry enables the touch system to withstand and adapt to
temperature extremes as well or better than the host display and system.
The standard Carroll Touch modular flat panel system is designed to
function in the temperature range from 0° C to 50° C (32° F to 122° F)
and can be stored in the range from -20° C to 75° C (-4° F to 167° F).
Customer systems have been designed to function at temperatures from
-55° C to 125° C (-67° F to 257° F). For heat dissipation, Carroll Touch
modular touch systems are designed to operate at altitudes up to 10,000
feet (3,048 meters) and at 0% to 95% non-condensing humidity, over
the full temperature range.
Modular Flat Panel Mounting and Environments Guide 1-3
Chapter 1 - Introduction CARROLL TOUCH
Shock and Vibration
Carroll Touch modular flat panel touch systems can more than
withstand shock and vibration conditions that will disable a typical flat
panel display. The lightweight solid state circuit card assemblies,
because of their low mass, are relatively immune to shock and
vibration, as are the other components of the system.
In the unlikely event that a beam is lost to severe local shock, fault
tolerance begins and the touch system continues to function by virtue
of its failed beam algorithms while reporting the beam loss.
Chemicals
The modular touch system relies on the basic properties of the materials
from which it is manufactured for environmental protection. The
polycarbonate resins from which the touch system components are
manufactured and their resistance to harsh chemicals and
environmental extremes are discussed in Chapter 3.
If chemical factors make your operating environment unsuitable for
some components of the touch system, other materials and coatings for
touch systems and their components are available. These materials and
coatings, along with tips on sealing the touch system, are discussed in
Chapter 4.
Moisture
Carroll Touch modular flat panel touch system are designed to function
at up to 95% non-condensing humidity. In addition, modular flat panel
systems can be sealed, making the touch system impervious to
precipitated moisture, such as rain, dousing, or sprinkling, as long as it
is mounted in a vertical position. As shown in Figure 1-3, an improperly
mounted system can permit water to pool in the face of the modular
system, absorbing a portion of the IR beam strength. The
programmable gain features built into the ASIC and firmware will
compensate for losses of beam strength in the range of 50-90% with no
system failure.
1-4 Modular Flat Panel Mounting and Environments Guide
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