Overview of Adaptive Addressing
"Adaptive Addressing" for enhanced low
temperature operation.
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Response Time: The viscosity of all liquid crystal fluids changes across the temperature range (think molasses.) The graph below, for our hypothetical LCD fluid again, shows how the response time of an LCD fluid slows down greatly at low temperatures. The exact numbers on the graph are unimportant, but the general shape of the graph is very representative of a real fluid.
When an LCD manufacturer states a response time it's usually at room temperature, around 25oC or so. How a fluid will respond at low temperatures is anyone's guess, but it will generally follow a curve similar to the one above. If a manufacturer claims that the lower operating temperature of an LCD is -40oC, it is important to ask the follow-on question of "What is the response time at that temperature. The answer is usually measured in many second intervals, and sometimes that includes increasing the drive voltage as described in the preceding page. |
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