Calculator Community > Other Calculators
TI-81 Screen Types?
DJ Omnimaga:
I wonder what LCD does the ROM 1.0 calcs got? If I remember, though, on Datamath for a while the 2nd model listed seemed to have a blue LCD, but it might have been due to the camera lightning.
CVSoft:
I found clearer pics of TI-81 screens on Datamath via web archive. Those show a change in screen starting in ~1995, consistent with below. However, there were only two at the time.
Based on comparison, I noticed the following trend, listed in order of appearance on the current Datamath page:
The ES cannot be determined, appears blue
The second appears to have a blue screen
The third has a blue screen
The fourth has a gray screen
The fifth has a gray screen
Seems they reduced quality then. For cost reasons they probably put in a lower-quality screen in the very first ones to see how well it performed in the market (?). That's just my guess.
eBay also makes a good photo repository IMO.
DJ Omnimaga:
Was the third with ROM 1.1K? Because mine has 1.1K from 1991 and has a gray LCD.
As for Ebay I tend to not take photos for granted, though, because in many occasions I found people using genetic photos of an item instead of taking a picture, and as a result, the calculator looked slightly different from the pic.
CVSoft:
Looking closer, it seems the gray screens are more pixely than the blue screens. That means only the third one used a blue screen, which seems correct. I should look before I post :P .
GB:
I had an old 1.8K TI-81 with the blue screen.
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