Liquid crystal cell with means for measuring the switching time of the cell for controlling temperature or contrast of the cell and method of controlling such a cell

摘要

A liquid crystal cell (1) has a measurement device (3) for regulating one or more parameters that depend on the temperature of the liquid crystal's substance. This measurement device determines response time for the liquid crystal cell and has a source of light (4) for this that can transmit light through an independently switchable section of the liquid crystal.