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Display manufacturing apparatus and display manufacturing method

  • US 20040051817A1
  • Filed: 05/13/2003
  • Published: 03/18/2004
  • Est. Priority Date: 05/17/2002
  • Status: Active Grant
First Claim
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1. A display manufacturing apparatus comprising:

  • pressure chambers communicating with nozzle openings and capable of reserving liquid material;

    electromechanical conversion elements capable of changing the volume of the pressure chambers;

    an injection head capable of discharging the liquid material in the pressure chambers out of the nozzle openings in its liquid drop state accompanied by the supply of driving pulses to electromechanical conversion elements; and

    driving pulse generating means capable of generating driving pulses; and

    constructed to hit liquid material discharged out of nozzle openings to liquid material regions on the surface of a display substrate, the improvement comprising;

    liquid material amount detecting means capable of detecting the hitting amount of liquid material at each liquid material region;

    short amount acquiring means for acquiring the short amount of liquid material at the corresponding liquid material region from a difference between the hitting amount of liquid material detected by the liquid material detecting means and the target amount of liquid material; and

    pulse shape setting means for setting a shape of the driving pulses to be generated by the driving pulse generating means;

    wherein the pulse shape setting means sets a waveform of the driving pulses according to the short amount of liquid material acquired by the short amount acquiring means; and

    wherein the short amount of liquid material is supplemented to the corresponding liquid material region by generating the driving pulses from the driving pulse generating means and supplying them to the electromechanical conversion elements.

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