Thermal control system for liquid crystal cell
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United States of America Patent
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Sep 13, 2005
Grant Date -
Aug 26, 2004
app pub date -
Feb 21, 2003
filing date -
Feb 21, 2003
priority date (Note) -
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Abstract
A thermal control system for a liquid crystal cell is presented that may utilize a time division scheme to multiplex temperature sensing and heating functions across active thermal elements such that the cell may generally be kept at a constant temperature. A calibration process characterizes the profile of the cell and generates a polynomial regression formula that provides the voltage drive output for a temperature and cell state input. The control system stores the state of the liquid crystal cell, the regression formula, and reads the temperature of the liquid crystal cell to compute end assert the temperature compensated voltage drive.
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