Writing apparatuses and methods
OwnerLars Stiblert, Torbjorn Sandstrom +2inventors
InventorsLars Stiblert, Torbjorn Sandstrom, Jarek Luberek, Tomas Lock
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Abstract
Patterns are written on workpieces, such as, glass sheets and/or plastic sheets used in, for example, electronic display devices such as LCDs. The workpiece may be larger than about 1500 mm may be used. An optical writing head with a plurality of writing units may be used. The workpiece and the writing head may be moved relative to one another to provide oblique writing.
Claims30
An apparatus for patterning a workpiece, the apparatus comprising:
- at least two optical writing units for patterning the workpiece, the at least two optical writing units including separate final lenses;
- a calibration sensor configured to detect characteristics of the at least two optical writing units.
An apparatus comprising:
- a cylindrical holder for holding at least one workpiece;
- and
- a rotor scanner for patterning the at least one workpiece, the at least one rotor scanner including at least two writing units, the rotor scanner being configured to move in an axial direction relative to the cylindrical holder and configured to rotate on an axis, the axis of rotation being substantially perpendicular to the axial movement of the cylindrical holder.
A writing apparatus for patterning a workpiece, the writing apparatus comprising:
- writing head including a plurality of writing units, each writing unit configured to emit electromagnetic radiation for patterning the workpiece;
- a detector for detecting characteristics of a writing unit;
- and
- a control unit for adjusting at least one parameter of at least two optical writing units based on the detected characteristics.
A method for calibrating an optical writing head, the method comprising:
- detecting at least one characteristic of at least two optical writing units included in the writing head;
- determining a correlation between each of the at least one detected characteristics and a corresponding set parameter value;
- and
- adjusting at least one parameter value for each of the at least two optical writing units based on the determined correlation.
Dependencies are inferred from the claim text.