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JerryG
Mar5-10, 09:52 AM
Is there a way to turn a non-backlit LCD into a backlit LCD? My TI-89 graphing calculator is difficult to see in dim lighting. Got any ideas? You would think that by now, TI and HP would have some color/backlit LCDs on the calculators.
berkeman
Mar5-10, 12:10 PM
Is there a way to turn a non-backlit LCD into a backlit LCD? My TI-89 graphing calculator is difficult to see in dim lighting. Got any ideas? You would think that by now, TI and HP would have some color/backlit LCDs on the calculators.

There's no practical way that I know of. Is there a contrast/viewing angle adjustment for the display in the menus?
ranger
Mar6-10, 11:51 PM
Is there a way to turn a non-backlit LCD into a backlit LCD? My TI-89 graphing calculator is difficult to see in dim lighting. Got any ideas? You would think that by now, TI and HP would have some color/backlit LCDs on the calculators.

I know that its possible to make a TI86 calc with backlight by using an electroluminescent (EL) panel.
berkeman
Mar7-10, 05:07 AM
I know that its possible to make a TI86 calc with backlight by using an electroluminescent (EL) panel.

Well that's kind of a teaser ranger! We need pictures and links! :smile:
ranger
Mar7-10, 08:22 AM
Well that's kind of a teaser ranger! We need pictures and links! :smile:

Woops! Forgot to attach some demo pics and instructions :shy:
http://web.archive.org/web/20010125213600/http://www.genetech.net/dknaack/
http://web.archive.org/web/20080523123622rn_1/www.michaelv.org/programs/calcs/calc_mods.php