DATAMATH CALCULATOR MUSEUM
|Date of introduction:||May 15, 1973||Display technology:||COS-LCD|
|New price:||•26.800, US$110||Display size:||8|
|Size:|| 4.8" x 3.2" x
121 x 81 x 22 mm3
|Weight:||6.5 ounces, 185 grams||Serial No:||4006446|
|Batteries:||1*AA||Date of manufacture:||mth 10 year 1974|
|AC-Adapter:||Origin of manufacture:||Japan|
|Program steps:||Courtesy of:||Joerg Woerner|
It was on May 15, 1973 that Sharp released the EL-805 LCD calculator, starting a revolution in electronics. Until then, calculators used fluorescent character display tubes or light-emitting diodes. Using LCD for the number display meant that power consumption was cut dramatically - to a mere 1/100th of previous calculators. This astonishing leap in energy efficiency gave users 100 hours on one AA battery. Read more about power consumption of electronic calculators here. Sharp's unique silver-coloured COS-LCD display was three years later replaced with the EL-8020 by the common yellow-screen FEM-type display. Just as importantly, it meant that calculators were about to become much smaller and slimmer. Although the EL-805 cost twice as much as previous calculators, it was an international sensation.The EL-805 was marketed as electronic calculator employing COS (calculator on substrate) technique, which was LCD and CMOS LSI on a single glass substrate.
The EL-805 was the first calculator copied from the first screw to the last piece of layout work. Read the incredible story of the Russian B3-04 calculator.
The EL-8010 was one of the last calculators using the silver-colored COS-LCD display.
Don't miss the huge EL-808 desktop calculator featuring a bare silver-colored COS-LCD display in action.
The first LCD calculator sold by Texas Instruments could be found in the TI-1750.
Read more about Sharp
Corporationís Calculator Innovations.
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© Joerg Woerner, December 25, 2001. No reprints without written permission.