4 Jan
2007
4 Jan
'07
3:48 p.m.
I don't see why. I've seen early 1970s guitar
amplifiers that use a
large EL strip for the control panel backlight. It's not a huge stretch
to imagine that NASA would make a display for a spaceship computer out
of them a few years previously.
At least one Philips valved radio (1960's, I think) used an EL panel as
the base for the tuning dial (rather than the more conventional filament
lamps to illuminate said dial). And I seem to remember reading about EL
panels in photogrpahic books of the late 1950s (they were proposed as a
darkroom safelight).
Of course all these applications ued plain panels, not divided up into
segments.
-tony