Recently I bought a pretty cheap flat-screen TV. Screen is IPS, semi-matte. 7 months now, I haven't cleaned it once, no dust at all. The TV works a few hours per day. I was wondering why it does not collected dust, while my other computer & laptop screen which are also IPS, matte, collect dust like crazy.
It is unlikely that the electronics of the device is responsible for that. The times of high static voltage in TVs are long gone. The only electronic thing I think could be responsible for that is improper grounding. But I think even a manufacturer of cheap TVs cares about proper grounding, unless he wants to risk expensive lawsuits filed by the relatives of killed customers.
More likely the phenomenon is related to the plastics of casing or the screen. They could have treated it with antistatic agents (which I have read is not that uncommon), or the plastics itself could be minimally conductive, so that static charge does not accumulate on it. Plastics can be made conductive by immersing carbon dust in it (which is probably not advisable for a screen...).
One thing I have observed myself is that cleaning often makes things worse, because by that you introduce the charges to the surface, which stay there long enough to attract dust, thanks to the isolating properties of ordinary plastics. It's like rubbing a balloon or a vinyl record and attracting your hair with it. So, paradoxically, maybe simply the fact that you just bought the TV and have not cleaned it yet, might be responsible for it having stayed clean.