Hi I have been looking into touch screen monitor, and I have narrowed it down to two. The first one is the Dell SX2210, this screen has a response time between 12.5 to 17.5 for touch, I have looked at videos for it and the only problem I can for see is typing as it seams to lag a lot, I do have a high end spec pc so I don't know if it is just because the videos are done on low end pc's. the other is HP Compaq L2105tm, now I have seen some videos but they really don't put it though it's pace, and I can not find a response time on this screen so I don't know if this is any good. Firstly has anyone used these screens and if so how good are they ? secondly has anyone used other screen's that maybe better in touch response/lag. As long at it's 1080p that is all I am asking and has a fast response time, faster the better, I have looked at the Microsoft video 1ms response time and it looks great, how ever we are not near that speed yet.
My pc spec is
I7- 3930K over clocked to 4.2
asus sabertooth x79
G-Skill 32 gb DDR 2133
XFX 7950 900 Ghz cpu 1250 Ghz memory (stock)
OCZ 240GB Agility 3 SSD x 2 RAID 0
Windows 8 64 bit
Noctua NH-DH14 Se2011
They are both optical sensor with multitouch. Optical will always be slower, as an invisible light grid is what creates the touch, based on where the grid is interrupted. The processing time from touch to sense to feed is where the delay happens. The plus is that anything from a finger to a stylus of any composition can be used. Grunge from use can hamper the usability of this type.
Capacitive or resistive are more responsive, as it is a more direct sensing method. Capacitive unfortunately works by the electromagnetic field of the human body, so only your finger or a stylus made out of a conductive material will work. Resistive works on pressure, so anything will work, but these displays tend to be more stylus friendly as passing your finger over with pressure transfers oils and also can shift the screen. Prices tend to be at or below optical types.
The best (IMHO) is surface acoustic wave. This type is very open on pointing device (fingers, stylus, etc.), require little pressure, and are usually a nice tough glass so easy to clean. This sensing type also lasts a lot longer; calibrate it once and it will work for a long time. However you are looking at expensive displays here.
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