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2-16 IntelliTouch/SecureTouch Guide
The potential interference between the degaussing coil and the touchscreen
must also be evaluated. The coil will usually fit between the touchscreen and
the inside surface of the bezel, as there is typically a natural cavity for it. If
there is not enough space for the coil, you may have to provide additional
setback for the CRT. It may also be possible to relocate the coil to the bell
side of the CRT. Normally, this does not significantly reduce the coil’s
effectiveness. However, you must determine this by inspecting the display
for color problems after reassembly.
• Check for adequate clearance of the transducers and the cable from the bezel
structure. If the position of the cable causes difficulty, the touchscreen may
be rotated 180° (only if the touchscreen is sealed and using Elo drivers).The
preferred orientation of the IntelliTouch touchscreen is with the cable exiting
from the right side, when viewed from the front of the display. Rotation will
cause an inversion of the output coordinates, which will be compensated for
automatically by Elo driver software, but perhaps not by other drivers. (Flat
touchscreens should have the reflector stripes on the side facing the user.)
Verify Touchscreen Fit
1 Check to ensure touchscreen dimensions match CRT display. Place the
touchscreen on the face of the tube to see that the face of the CRT and
touchscreen are about the same size, and that the radius of curvature (ROC)
of each surface matches well. If both of these conditions are not met, you
may not have the proper touchscreen for the display. Most color displays
have standard size CRT's with standard ROC's, and Elo has touchscreens for
most of them.
2 Determine if the touchscreen will fit in the bezel without modifications to the
bezel. The bezel should not touch the transducers and should land in the
sealing area, not on the reflector strips.
2
Modifications, if necessary, should
be done without compromising the mechanical integrity of the display. Also
see Bezel Design section for recommendations.
Note:
If the touchscreen will not fit flush against the lip of the bezel, do not force it. An
interference fit between the edge of an IntelliTouch touchscreen and some of the plastic
ribs found in display bezels can pinch and break the small wires which carry the signals
along the edges of the touchscreen or even result in fracture of the glass after
reassembly.
2. Clearance around the transducers should be 1-2 mm clearance above transducers (to prevent
dampening vibration, electrical short or breakage), and 3-5 mm around transducers. Allow for
manufacturing variances of touch screen and integration. If the position of the cable causes difficulty,
the touchscreen may be rotated 180°. The preferred orientation of the IntelliTouch touchscreen is with
the cable exiting from the right side, when viewed from the front of the display. Rotation will cause an
inversion of the output coordinates, which will be compensated for automatically by Elo driver
software, but perhaps not by other drivers. (Flat touchscreens should have the reflector stripes on the
side facing the user.)