17 Jan
2011
17 Jan
'11
11:25 a.m.
The mechanical construction looks a lot like the ones
used for HP 16500
LA's only the HP150 use a casing with holes in it where the 16500 LA uses
dark IR passing plastic .
That may well have been an improvement casued by the known problem of
dirt collecting in the holes (particularly along the bottom edge) and
blocking the beams. HP sold some plastic strips to clip into the holes on
the HP150, but theydidn't do a lot of good.
The 12" touchscreen that I've seen (e.g. on the HP150-II) works on the
same principle, but has an HP-HIL interface. It also has a redesigned
bexel without physical holes, presuably to avoid the problem/
The touchscreen PCB is bent a little to follow the
curves of the screen.
I will ahe to look at that. It's mounted by 4 corner screws onto the back
of the bexzel, I didn't realise that it bent the PCB.
This makes it a bit tricky to measure because when the
PCB isn't exactly in
line with the holes it doesn't work right.
-tony