Have you guys seen this before?
Is's the LCD.
Our displays are made from a back lit layer of liquid crystals sandwiched between two layers of arranged electrodes and two parallel polarizing filters. This filter arrangement will allow one direction of light to enter, and only the same direction of light to exit. Ordinarily with a filter arrangement like this, nearly all of the light that enters it would also exit it, but if the light were to somehow change direction in between the two filters, it would be blocked by the second filter. Well, the liquid crystal arrangement between the filters is naturally 'twisted', and it in turn twists the light, and forces the light to change direction. Most light will now be blocked by the second filter
When voltage is applied to an electrode pair, it 'untwists' the liquid crystals sandwiched between it. The light is no longer twisted as it passes through the crystals, so it maintains the incident direction and freely passes through the second filter unblocked
So normally, the light portions of the display (the numbers, letters) are electrodes with a voltage being applied to them, and untwisted liquid crystals that do not redirect the back light, and allow it to pass through the cluster.
The dark parts of the display (the empty space) are electrodes with no voltage being applied to them, and twisted liquid crystals that redirect the light so it is blocked by the polarizing filters.
You see random light pixels in your display. If bubbles formed in the liquid crystal, there would be nothing to twist the light, and light would pass through the filters unblocked. If the electrodes themselves were no longer functioning correctly for whatever reason, you'd see dark spots in the the ordinarily light areas, not the other way around. The voltage signals that keep the electrodes powered could be screwing up (pulsing attenuated signals over a grid.. when the pulses from X and Y line up over a specific electrode, it's powered), but I'd kind of expect the dots to change positions on occasion at least.. do they?
tl;dr I'm going with bubbles in the LCD.
If you were able to gentle massage the LCD display directly, you might be able to squish liquid back into the voids.
Our displays are made from a back lit layer of liquid crystals sandwiched between two layers of arranged electrodes and two parallel polarizing filters. This filter arrangement will allow one direction of light to enter, and only the same direction of light to exit. Ordinarily with a filter arrangement like this, nearly all of the light that enters it would also exit it, but if the light were to somehow change direction in between the two filters, it would be blocked by the second filter. Well, the liquid crystal arrangement between the filters is naturally 'twisted', and it in turn twists the light, and forces the light to change direction. Most light will now be blocked by the second filter

When voltage is applied to an electrode pair, it 'untwists' the liquid crystals sandwiched between it. The light is no longer twisted as it passes through the crystals, so it maintains the incident direction and freely passes through the second filter unblocked
So normally, the light portions of the display (the numbers, letters) are electrodes with a voltage being applied to them, and untwisted liquid crystals that do not redirect the back light, and allow it to pass through the cluster.
The dark parts of the display (the empty space) are electrodes with no voltage being applied to them, and twisted liquid crystals that redirect the light so it is blocked by the polarizing filters.
You see random light pixels in your display. If bubbles formed in the liquid crystal, there would be nothing to twist the light, and light would pass through the filters unblocked. If the electrodes themselves were no longer functioning correctly for whatever reason, you'd see dark spots in the the ordinarily light areas, not the other way around. The voltage signals that keep the electrodes powered could be screwing up (pulsing attenuated signals over a grid.. when the pulses from X and Y line up over a specific electrode, it's powered), but I'd kind of expect the dots to change positions on occasion at least.. do they?
tl;dr I'm going with bubbles in the LCD.
If you were able to gentle massage the LCD display directly, you might be able to squish liquid back into the voids.
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geoff2005
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