lcd displays in calculators price
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Portable or pocket electronic calculators have 2 basic types of displays. One emits light, usually in some color like red, blue, green, or orange. This type of display can be a light emitting diode (LED) or some sort of tube encased
The second type of display is a reflective type of display, usually called "liquid crystal display" or LCD. LCDs were first used for calculators in 1971 and 1972 by Rockwell, Sharp, and Texas Instruments. The benefit was a lower
power consumption for the calculator. Unfortunately these early LCD displays did not have the manufacturability or durability expected of a consumer device. Within a year or two, the first LCDs were abandoned.
Research was still being performed and LCD displays were eventually refined enough to use again. At first a yellow filter or "screen" was used to block harmful ultraviolet light. Further LCD refinements made that unnecessary. By
We are beginning to list LCD models for two main reasons. First, they will help document LCD calculators. In another case (and more importantly to some of us), this list should also help those who DO NOT want LCD calculators and
need a reference source in case someone offers an unknown model. In the second case, while a buyer can ask for display information, I have sometimes found sellers who don"t understand the concept and give false information
(with honest intentions). We will also list the "yellow screen" LCDs, the early Rockwell, Sharp (Calculator-on-Substrate - COS) and TI efforts separately on this page.
If you have any LCD models, please get in touch with us with the model number and some basic information (like is it a "yellow screen" or just silver/gray color). If you have any date information, please include that also.
(A big thanks to Thomas Brockmeier, Andrew Davie, Larry Gilbert, Bob King, Jeff Lane, Timo Leipalc, Randy Massey, Bob Patton, John Robinson, Pepe Tozzo, and Charles Vesser for their help).