3M MicroTouch Near Field Imaging (NFI) Integration Manual - page 8
3M Touch Systems Proprietary Information
2
MicroTouch
TM
Near Field Imaging (NFI)
TM
Integration Guide
Touch screen controller. The controller decodes signals on the touch
screen. It has connectors for the touch screen tail and for communications/
power.
Floppy disk with linearization file (does not accompany 8.4-inch
screens). Linearization increases the accuracy of an NFI touch screen and
is required for screens larger than 8.4 inches. For details on linearizing, see
“Steps for resetting baseline”, starting on page 18.
Bar code sticker on the touch screen. The serial number provided on
the bar code stickers correspond to the linearization file that is installed (from
the floppy disk) when setting up the touch screen system.
The bar code sticker on the touch screen helps you to recognize which side
of the touch screen is the front side and which is the back side. If you are
looking at the printed side of the bar code sticker, you are looking at the front
of the touch screen.
You will need the serial number if it is ever necessary to:
Re-install the linearization file.
Contact 3M Touch Systems customer service.
Cleaning the touch screen
Follow these guidelines for cleaning the NFI touch screen:
To clean the touch screen’s back side, blow away dust with pressurized air.
To clean the front of the touch screen, use cleaning solutions and cloths
designed for cleaning coated optical glass (e.g., isopropyl alcohol and water
50:50 solution). Do not use any chemical that corrodes glass. Follow cleaner
manufacturer’s material safety data sheet (MSDS) and follow all instructions
and recommendations on product label.
Apply the cleaner with a soft, lint-free cloth. Avoid using gritty cloths.
Apply the cleaning liquid to the cloth, not directly to the screen.
Terms
These terms appear in this manual and may be unfamiliar.
This term
Refers to
Baseline
An electronic ‘picture’ of the touch screen and its immediate
surroundings. Baseline must be reset after any physical or
mechanical change is made to the NFI touch screen integration
or system. With an up-to-date baseline, the touch screen system
performs more accurately and efficiently.
Display area
The part of the touch screen that is positioned over the product’s
display. Touches in the display area emulate the movements
and actions of a mouse.
Continuous frame
Gasket material that has no ends.
Metallized bezel
Plastic bezel with conductive material applied to its interior.
Near Field Imaging
(NFI)
A touch screen that uses a proprietary imaging technique to
generate a precise profile of a touch from changes in the
electrostatic field near to the point of contact.
Opaque area
A narrow border around the perimeter of the touch screen
(usually silver-grey or black) that does not register touches.
Sometimes called “the guard”.
Touch sensitive area
Part of touch screen’s viewing area that will register a touch.
Viewing area
The part of the touch screen that is within the opaque area.