Turn Non-Backlit LCD Into Backlit LCD | TI-89 Graphing Calculator

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SUMMARY

The discussion centers on modifying a TI-89 graphing calculator to convert its non-backlit LCD into a backlit version. While there is no straightforward method for the TI-89, users have successfully implemented backlighting in the TI-86 model using an electroluminescent (EL) panel. Participants express the need for visual aids and detailed instructions, which are provided through links to archived web pages containing demo pictures and modification guides.

PREREQUISITES
  • Understanding of LCD technology and backlighting methods
  • Familiarity with the TI-89 and TI-86 graphing calculators
  • Basic electronics knowledge for handling modifications
  • Access to tools for disassembling and modifying electronic devices
NEXT STEPS
  • Research how to implement an electroluminescent (EL) panel in calculators
  • Explore modification techniques for TI-86 graphing calculators
  • Learn about the differences between various LCD technologies
  • Investigate community forums for additional calculator modification projects
USEFUL FOR

Electronics enthusiasts, calculator modders, and anyone looking to enhance the visibility of their TI-89 or similar graphing calculators in low-light conditions.

JerryG
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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.
 
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JerryG said:
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?
 
JerryG said:
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.
 
ranger said:
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:
 
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