The 3M™ Multi-Touch Display M1866PW takes interactive display technology to the next level by combining uncompromising multi-touch performance, brilliant high-definition graphics, wide viewing angles and elegant product design.
, Interactive Point of Purchase (iPOP)
, Assisted Selling
, Trade Show/Convention
, Software Development
250 cd/m2 (nit) typical
OSD with capacitive buttons
IPS (In Plane Switching)
1366 x 768 (HD)
Number of Touch Points
20 points with palm rejection
0 to +40 degrees C (anticipated)
, Non-condensing 90% (anticipated)
, Relative Humidity
Operating System Support
, Windows 7/Vista/XP
0.100 mm x 0.300 mm
External 110/220 VAC Power Supply
-10 to +60 degrees C (anticipated)
Touch Point Speed
3M Projected Capacitive
100 mm x 100 mm
Video Response Time
9 milliseconds (typical)
Horizontal/Vertical: 178 degrees typical
1 year on touch display
How Projected Capacitive Technology Works
Projected capacitive technologies detect touch by measuring the capacitance at each addressable electrode. When a finger or a conductive stylus approaches an electrode, it disturbs the electromagnetic field and alters the capacitance. This change in capacitance can be measured by the electronics and then converted into X,Y locations that the system can use to detect touch.
3M Project Capacitive Technology (3M PCT) is based on mutual capacitance to create multi-touch interactive. Mutual capacitance is the intentional or unintentional capacitance between two "charge holding objects” (see illustration). Projected capacitance touchscreens intentionally create mutual capacitance between elements of columns and rows in the vicinity where each intersect the other. This allows the system electronics to measure each node (intersection) individually to detect multiple touches on the screen during one screen scan.
When a finger touches near an intersection, some of the mutual capacitance between the row and column is coupled to the finger which reduce the capacitance at the intersection as measured by the system electronics. This reduced capacitance crosses the "touch threshold" set by the electronics indicating a touch has occurred.