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AssigneeBrother Kogyo Kabushiki Kaisha
InventorYasuhiro Hattori
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An ink jet apparatus which is easy to change parameters of a driving signal to be applied to an ink jet head depending on desired ink drop volume is provided. In steps S22, S24, S26 and S13, reference voltage es, reference frequency fs and waveform parameter are modified. Based on these modified parameters, the reference volume cs modified in step S16 is compared in step S17 with unit volume ci inputted in step S11. The modification of the reference parameters and the reference volume cs, and comparison between the reference volume cs and the unit volume ci are repeated till a difference is equal to or lower than a predetermined threshold. The respective reference parameters when the difference is equal to or lower than the predetermined threshold are determined as the parameters of the driving signal.
An ink jet apparatus provided with an ink jet head having a nozzle for ejecting ink drops and capable of increasing or decreasing ink drop volume ejected from the nozzle depending on parameters of a driving signal applied, the ink jet apparatus comprising:
A method for manufacturing organic EL (Electro Luminescence) display panel by means of an ink jet head having a nozzle for ejecting ink drops and capable of increasing and decreasing ink drop volume ejected from the nozzle based on parameters of a driving signal applied, the method comprising steps of:
A method for determining parameters of a driving signal applied to an ink jet head of an ink jet apparatus, the ink jet head having a nozzle for ejecting ink drops and capable of increasing and decreasing ink drop volume ejected from the nozzle based on the parameters of the driving signal to be applied, the method comprising steps of:
A parameter determination program for controlling an ink jet apparatus provided with an ink jet head having a nozzle for ejecting ink drops and capable of increasing and decreasing ink drop volume ejected from the nozzle based on the parameters of the driving signal applied, wherein
Dependencies are inferred from the claim text.
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Control methods or devices therefor, e.g. driver circuits, control circuits: aiming at correcting other parameters
Control methods or devices therefor, e.g. driver circuits, control circuits: controlling heads based on heating elements forming bubbles
Control methods or devices therefor, e.g. driver circuits, control circuits: controlling heads based on piezoelectric elements
Control methods or devices therefor, e.g. driver circuits, control circuits: using a specific waveform
Term end not estimated
(i) Technical Field of the Invention
This invention relates to an ink jet apparatus which ejects ink from a nozzle of an ink jet head to color a target object.
(ii) Description of the Related Art
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a block diagram showing a constitution of an ink jet apparatus as a whole;
FIG. 2A is a top view showing a constitution of a head unit;
[Overall Constitution]
As shown in FIG. 1, an ink jet apparatus 1 comprises an ink jet head (hereinafter, simply referred to as a head) 10, a head driving circuit 20 for supplying a driving signal to the head 10, an x-axis motor 30 for shifting the head 10 to an x-axial direction (a lateral direction in FIG. 1; see an arrow A), an x driving circuit 40 for driving the x-axis motor, a stage 50 for attaching a target object to be colored thereon, a y-axis motor 60 for shifting the stage 50 to a y-axial direction (a vertical direction in FIG. 1; see an arrow B), a y driving circuit 70 for driving the y-axis motor 60, a control unit 80 for controlling the ink jet apparatus 1, etc. This ink jet apparatus 1 ejects ink drops from the head 10 while changing the positions of the head 10 and the stage 50 relative to each other using the x-axis motor 30 and the y-axis motor 60, to form a film over the target object attached on the stage 50.
The head 10 comprises independent head units 100 per color. In the present embodiment, the head 10 comprises head units 100R, 100G and 100B which correspond to three colors of red (R), green (G) and blue (B), respectively.