Is it possible to eliminate (turn off) dead pixels in LCD monitors?

[Dave D]

.. or a charred remains of a pixel that was fried by one of Sam's
lasers!

Always-on pixels are more annoying than always-off ones. I wonder, too,
if there is some way to short-circuit such a pixel and turn it
permanently off. Intuition suggests that this would be easier than
restoring it to normal function. Unfortunately I have no other ideas
right now.

TFTs actually work in the opposite way to what many people might think- an
energised pixel goes black and a non-energised pixel is clear, ie lit. When
a pixel is energised it becomes opaque, blocks out the backlight and appears
black. If the fault was down to an open transistor at that pixel location
then theoretically shorting out that transistor would cause the pixel to
turn black. I don't know how that would be achieved though, it could be
tricky!

If the lit pixel is caused by a break in continuity between the pixel and
its associated transistor that connection would have to be remade somehow,
and I expect that would be impossible or at least not technically and
financially viable or otherwise TFT repair facilities would offer such
services.

Dave



Dave