Methods and apparatus for making color filter by discharging a filter material

A method for making a liquid crystal device, the liquid crystal device comprising:

• a plurality of substrates for enclosing liquid crystal;
• and
• a plurality of filter elements aligned on at least one of the substrates, and the method comprising:
• moving an inkjet head relative to the substrate or moving the substrate relative to the inkjet head in a first-scanning direction, wherein the inkjet head has a nozzle line comprising a plurality of nozzle groups, the nozzle groups including a first nozzle group and a second nozzle group, each nozzle group including a plurality of nozzles;
• selectively discharging a plurality or filter materials from the plurality of nozzles to form the plurality of filter elements;
• and
• moving the inkjet head relative to the substrate or moving the substrate relative to the inkjet head in a second-scanning direction so that a filter material discharged from a first nozzle of the first nozzle group and a filter material discharged from a second nozzle of the second nozzle group coincide with the same filter element on the substrate, the first-scanning direction and the second-scanning direction intersecting each other,
• wherein the inkjet head moves relative to the substrate or the substrate moves relative to the inkjet head by a distance corresponding to an integral multiple of the length of one of the nozzle groups in the second scanning direction.

A method for making an electro-luminescent device, the device comprising a plurality of pixels, each including an electro-luminescent layer, aligned on a substrate, the method comprising:

• moving an inkjet head relative to the substrate or moving the substrate relative to the inkjet head in a first-scanning direction, wherein the inkjet head has a nozzle line comprising a plurality of nozzle groups, the nozzle groups including a first nozzle group and a second nozzle group, each of the nozzle groups including a plurality of nozzles;
• selectively discharging a plurality of electro-luminescent materials from the plurality of nozzles to form the plurality of filter elements;
• and
• moving the inkjet head relative to the substrate or moving the substrate relative to the inkjet head in a second-scanning direction so that an electro-luminescent material discharged from a first nozzle of the first nozzle group and an electro-luminescent material discharged from a second nozzle of the second nozzle group coincide with the same filter element on the substrate, the first-scanning direction and the second-scanning direction intersecting each other,
• wherein the inkjet head moves relative to the substrate or the substrate moves relative to the inkjet head by a distance corresponding to an integral multiple of the length of one of the nozzle groups in the second scanning direction.

A method for discharging a material towards an object, comprising:

• moving a head relative to the object or moving the object relative to the head in a first-scanning direction, wherein the head has a nozzle line comprising a plurality of nozzle groups, the nozzle groups including a first nozzle group and a second nozzle group, each nozzle group including a plurality of nozzles;
• selectively discharging a plurality of materials from the plurality of nozzles to form a plurality of filter elements;
• and
• moving the head relative to the object or moving the object relative to the head so that a material discharged from a first nozzle of the first nozzle group and a material discharged from a second nozzle of the second nozzle group coincide with the same material on the object, the first-scanning direction and the second-scanning direction intersecting each other,
• wherein the head moves relative to the object or the object moves relative to the head by a distance corresponding to an integral multiple of the length of one of the nozzle groups in the second scanning direction.