I posted a couple months back a desire to find a
very bright 1-1.5" diagonal screen capable of displaying
monochrome video/VGA. One avenue I've pursued is pirating
the small CRTs of camcorder viewfinders.
One such effort has yielded a 1.5" diagonal
CRT-based viewfinder (JVC), designed for professional
camcorders. It indeed is pretty bright (600cd/m2 or better)
and since it is 1.5", outputs a total amount of light that
is appreciably larger than some of the LED/LCD solutions
offered. And... I've been finding them on ebay for $50-100.
One small problem that I'm sure is trivial, but if
the answer is obvious to some of y'all, might speed things
up... I have divined the pinout of the viewfinder, and when
I inject an RS-170 signal into the video input, an image
appears that is *almost* right, BUT either has difficulty
with vertical syncing, or produces a null band at the bottom
of the imaging, approximately 1/8 of the vertical width of
the screen. Perhaps this unit is slightly defective, but I
am guessing that the problem may be the wrong vertical sync
polarity. So how likely is this ? Do the symptoms fit (or
do they fit with another problem) ? Any easy fix (I believe
that sync corrector circuits are fairly readily available
out their, but pointers appreciated...)
Thanks
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