Plasma or LCD?

[xoxoxoBruce]

From Sperlock's link;

The thinner air at higher elevations causes an air-pressure differential-an imbalance between inner and outer air pressures-and the pressure of the gases inside the plasma display panel (PDP) increases as the outside air pressure decreases.

What? I don't think so.
If the tiny glass envelopes are rigid, a drop exterior pressure will not affect the internal pressure.
If the tiny glass envelopes can flex enough to change size, a drop in exterior pressure would cause the tiny glass envelopes to grow which would actually decrease the internal pressure.

Yeah, yeah, I realize the problem comes with an imbalance of pressures, I'm just taking issue with that highlighted statement .