DATAMATH  CALCULATOR  MUSEUM

Display used in TI Calculators and Clocks

The official introduction of the TI-2500 Datamath portable calculator and the desktop models TI-3000 and TI-3500 dates back to September 21, 1972. The three calculators used different display technology: The TI-2500 portable electronic calculator a red 8-digit light-emitting-diode (LED) display and the desktop models an orange gas-discharge displays with either 8 or 10-digits marketed by Burroughs as Panaplex™ display. Main disadvantage of these technologies was their high power consumption, later calculators like the TI-1750 used liquid-crystal-displays (LCD). The first LCD used yellow polarization filters to damp the ultraviolet radiation of the sunlight, later calculators like the TI-25 got transparent filters. One step between the LED and LCD marked the TI-1025 with its green vacuum fluorescent display (VFD).

Multi Digit Module LED Display 

Work-in-Progress. 

Type Year Number of Digits Calculator Comments
TIL360 1971  6   SR-10  
DIS40 1971  5 TI-2500  
DIS95 1971  4 TI-2500  
TIL370 1974  4   TI-70, TI-71  

Single Digit Module LED Display 

Work-in-Progress. 

Type Year Number of Digits Calculator Comments
TILxxx 1974  1  SR-60, SR-60A  

Multi Digit Stick LED Display 

Work-in-Progress. 

Type Year Number of Digits Calculator Comments
TIL233 1975  9  TI-1200   
TIL393-6    6    
TIL393-8    8    
TIL393-9    9    
DIS95         

Panaplex™ and Planar-Gas-Discharge Display

Work-in-Progress.

Type Year Number of Digits Calculator Comments
SP-352 1972  2    
SP-353 1972  3 Heathkit IC-2008A  

VFD (Vacuum-Fluorescent-Display)

Work-in-Progress.

Type Year Number of Digits Calculator Comments
Itron FG85CI    9 TI-1025, TI-1050  
         

LCD (Liquid-Crystal-Display)

Work-in-Progress.

Type Year Number of Digits Calculator Comments
         
         

 

horizontal rule

If you have additions to the above article please email: joerg@datamath.org.

© Joerg Woerner, 2001 - 2021. No reprints without written permission.