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Device for preventing printer header from overheating

  • US 20030222933A1
  • Filed: 04/03/2003
  • Published: 12/04/2003
  • Est. Priority Date: 05/30/2002
  • Status: Active Grant
First Claim
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1. A device for preventing a printer header from overheating, comprising:

  • a control portion generating a heater driving control signal and a power control signal;

    a heater driving portion which is driven in response to the heater driving control signal;

    a header substrate including a heater emitting heat using electricity which is supplied by the heater driving portion;

    a substrate temperature detector detecting a temperature of the header substrate to output a detection voltage;

    a reference voltage generator generating a reference voltage;

    a comparator comparing the detection voltage detected by the substrate temperature detector with the reference voltage; and

    a power switching portion switching a driving voltage to be supplied to the heater in response to the power control signal and controlling the driving voltage in accordance with an output signal of the comparator;

    wherein the control portion controls the heater driving portion and the power control portion in accordance with transmitted printing data.

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