Heater is designed to increase temperature of object that needs add heat. If LCD responds lately to lead to short-circuit that could consider using heter to keep normal operating.
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Heater is designed to use DC through an impedance path to result heat energy. Ex:V=lR, P=V2/R(V:voltage, l:electric current, R=resistance, P=thermal power),according to the phyics formula as below to prove the principle.
