Patent ID: 8702307

Claim:
A method for accurately determining and controlling the temperature of liquid crystals in an electronic display comprising: providing an electronic display comprising a TFT array; providing a metal heater layer integral to the TFT array of said electronic display; determining the relationship between a resistance of the metal heater layer and a temperature of the metal heater layer; initiating a temperature test interval; turning on a heater layer voltage with a heater layer current; measuring the heater layer voltage and heater layer current; determining a heater layer resistance; matching the heater layer resistance to a heater layer temperature via the relationship; and comparing the heater layer temperature with a threshold temperature, if the heater layer temperature is above the threshold temperature, turning off the heater layer voltage and reinitiating the temperature test interval, and if the heater layer temperature is below the threshold temperature, reinitiating the temperature test interval.