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P12T Touch-Interactive Projector Distance and Positioning Calculator
Introduction
This document provides distance calculation and positioning information for the P12 touch-interactive projector, enabling you to
determine the proper placement for the touch interactive WXGA, 16:9, and ultra-wide models of the P12 projector. It is essential
to reference the correct table for the projector model and measurement units (millimeters or inches) when placing the wall
bracket.
Note: This document is only for the touch-interactive models of the P12 projector. The distance calculation and positioning
information for the pen-interactive and non-interactive P12 models is on a separate document titled “P12 Pen-Interactive and
Non-Interactive Projector Positioning Guide.”
Projection Surface Flatness Requirement
The touch-interactivity feature requires a laser-flat projection surface with a non-planarity specification of ±0.12” (±3mm). Using a
projection surface that does not comply with this requirement will produce unsatisfactory or unreliable tracking performance.
It is very strongly recommended that the Laser Curtain Module be placed on the projection surface itself so as assure co-
planarity.
Frameless Versus Framed Whiteboards
The touch-interactive feature uses an infrared camera embedded in the projector to detect reflected infrared light generated by
the Laser Curtain Module. False positives caused by reflections from a frame surrounding the projection surface or environmental
sources of infrared can cause performance degradation.
If a framed whiteboard is used, the image must be positioned away from the frame at the distances shown in the diagram below.
A frameless whiteboard is recommended as it does not have this requirement.
Background
It is essential that the top of the projected image be positioned below the Tracking Buffer
space as shown at right.
• 0.8” (20mm) for WXGA/HD
• 1.6” (40mm) for the ultra-wide 16:6
Positioning the top of the projected image starts with positioning the wall mount bracket.
The wall mount bracket will produce an image of the desired size when the top of the wall
plate is positioned at a distance “O” as on the diagram below (outlined in red dashes).
Figure 1
