[Premium-Rx] 2050 Backplane Lighting

GandalfG8 at aol.com GandalfG8 at aol.com
Sun Feb 23 06:46:34 EST 2003


Hi All
Perhaps I'm missing something here but I can't see why it should need need 
anything that might generate EMI.
I can see that illumination could be more even with electroluminescent strips 
etc but can't help wondering if the old KISS principle hasn't got lost 
somewhere along the way?
I have a Rohde and Schwarz test set that uses small filament bulbs in 
recesses at either end of the display. These don't last indefinitely and are 
a real pain to replace so I intend to use white LEDs, high brightness if 
necessary, once I finally get round to the significant dismantling that will 
be involved.
Whilst I accept that the R&S will be easier, in the sense that it was 
intended for some form of illumination and the PCBs already designed to 
accept it, I can't see it would be that difficult to mount similar LEDs along 
the edges of any LCD display. I'm intending to try that with my non backlit 
1792 and if the resulting high spots are too obvious then I'm sure I'll be 
able to find some translucent adhesive tape to act as a diffuser.
regards
Nigel Clarke
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