Plasma display panel manufacturing method for manufacturing a plasma display panel with superior picture quality, a manufacturing apparatus, and a phosphor ink

A manufacturing method for a plasma display panel, comprising:

• a phosphor ink applying step in which a nozzle expels a continuous stream of phosphor ink onto a first plate on which partition walls are provided in the form of stripes, the nozzle moving relative to the first plate so as to scan the first plate with the nozzle positionally corresponding to a channel formed between adjacent partition walls;
• a sealing step in which a second plate is placed on top of the partition walls of the first plate, a gas medium is introduced between the first and second plates, and the first and second plates are sealed together,
• wherein the phosphor ink applying step includes:
• a first substep for obtaining position information relating to channels between the partition walls provided on the first plate;
• a second substep for setting a nozzle scanning line in each channel based on the position information obtained in the first substep;
• and
• a third substep for having the phosphor ink expelled from the nozzle and having the nozzle scan the first plate while adjusting the position of the nozzle within each channel in accordance with the nozzle scanning line set in the channel in the second substep.

A manufacturing method for a plasma display panel, comprising:

• a phosphor ink applying step in which a plurality of nozzles expel a continuous stream of phosphor ink of a same color onto a first plate on which partition walls are provided in the form of stripes, the plurality of nozzles being provided on a nozzle head, the nozzle head moving relative to the first plate so as to scan the first plate with the nozzles positionally corresponding to channels formed between adjacent partition walls;
• and
• a sealing step in which a second plate is placed on top of the partition walls of the first plate, a gas medium is introduced between the first and second plates, and the first and second plates are sealed together,
• wherein the phosphor ink applying step adjusts a pitch of the nozzles in a direction perpendicular to a scanning direction so as to match a pitch of the channels to which the phosphor ink is being applied.

A manufacturing method for a plasma display panel, comprising:

• a phosphor ink applying step in which a nozzle expels a continuous stream of phosphor ink onto a first plate on which partition walls are provided in the form of stripes, the nozzle moving relative to the first plate so as to scan the first plate with the nozzle positionally corresponding to a channel formed between adjacent partition walls;
• a sealing step in which a second plate is placed on top of the partition walls of the first plate, a gas medium is introduced between the first and second plates, and the first and second plates are sealed together,
• wherein the phosphor ink applying step comprising:
• a first substep in which a width of each channel is measured all along the channel before the phosphor ink is applied to the channel;
• a second substep in which the phosphor ink is applied by having the phosphor ink expelled while adjusting the amount of phosphor ink applied per unit length of the partition walls in accordance with the width of the channel that was measured in the first substep.

A manufacturing method for a plasma display panel, comprising:

• a phosphor ink manufacturing step for dispersing phosphors in a binder to produce a phosphor ink;
• a phosphor ink applying step in which a nozzle expels a continuous stream of the phosphor ink manufactured in the phosphor ink manufacturing step onto a first plate on which partition walls are provided in the form of stripes, the nozzle relatively scanning the first plate with the nozzle positionally corresponding to a channel formed between adjacent partition walls;
• and
• a sealing step in which a second plate is placed on top of the partition walls of the first plate, a gas medium is introduced between the first and second plates, and the first and second plates are sealed together,
• wherein the phosphor ink applying step starts immediately after the phosphor ink manufacturing step.

A manufacturing method for a plasma display panel, comprising:

• a phosphor ink manufacturing step for dispersing phosphors in a binder to produce a phosphor ink;
• a phosphor ink applying step in which the phosphor ink manufactured in the phosphor ink manufacturing step is applied into channels between partition walls provided on a first plate by expelling the phosphor ink from a nozzle;
• a phosphor ink applying step in which the phosphor ink manufactured in the phosphor ink manufacturing step is applied into channels between partition walls provided on a first plate in the form of stripes by expelling the phosphor ink from a nozzle that moves relative to the first plate to scan the first plate;
• a sealing step in which a second plate is placed on top of the partition walls of the first plate, a gas medium is introduced between the first and second plates, and the first and second plates are sealed together,
• wherein in the phosphor ink applying step, the phosphor ink manufactured in the phosphor ink manufacturing step is redispersed using a disperser before being expelled from the nozzle.

A phosphor ink that is used for forming a phosphor layer of a plasma display panel,

• the phosphor ink comprising a mixture of:
• phosphor particles with an average particle diameter of 0.5 to 5 μm;
• a resinous component containing ethyl cellulose or polyethylene oxide;
• a mixed solvent in which materials selected from a group consisting of:
• terpineol;
• butyl carbitol acetate;
• butyl carbitol;
• dipetane;
• and pentandiol are mixed;
• and
• a dispersant.

A phosphor ink that is expelled from a nozzle, which moves along partition walls formed on a plate of a plasma display panel in the form of stripes, to form a phosphor layer of the plasma display panel,

• the phosphor ink comprising a mixture of:
• phosphor particles on whose surfaces an oxide that becomes positively charged has been applied;
• a binder;
• and
• a solvent.

A phosphor ink that is expelled from a nozzle, which moves along partition walls formed on a plate of a plasma display panel in the form of stripes, to form a phosphor layer of the plasma display panel,

• the phosphor ink comprising a mixture of:
• phosphor particles on whose surfaces an oxide that becomes negatively charged has been applied;
• a binder;
• and
• a solvent.

A phosphor ink applying apparatus that has a nozzle expel a continuous stream of phosphor ink onto a plate, for use in a plasma display panel, on which partition walls are provided in the form of stripes, the phosphor ink applying apparatus including a nozzle moving means that has the nozzle move relative to the first plate so as to scan the first plate with the nozzle positionally corresponding to a channel formed between adjacent partition walls,

• the nozzle moving means comprising:
• a channel position information unit for obtaining position information relating to each channel between a pair of adjacent partition walls on the plate;
• and
• a nozzle position adjusting unit for adjusting a path taken by the nozzle within each channel based on the position information obtained by the channel position information unit.

A phosphor ink applying apparatus that has a plurality of nozzles provided on a nozzle head expel a continuous stream of phosphor ink onto a plate, for use in a plasma display panel, on which partition walls are provided in the form of stripes, the phosphor ink applying apparatus including a head moving means that has the nozzle head move relative to the first plate so as to scan the first plate with the nozzles positionally corresponding to channels formed between adjacent partition walls,

• the head moving means comprising:
• a rotating mechanism for rotating the nozzle head within a plane that is parallel to the plate;
• and
• a control mechanism that controls the rotation mechanism to rotate the nozzle head to make a pitch of the nozzles on the nozzle head in a direction perpendicular to a scanning direction match a pitch of the channels positionally corresponding to the nozzles.

A phosphor ink applying apparatus including an ink expelling means that has a nozzle expel a continuous stream of phosphor ink onto a plate, for use in a plasma display panel, on which partition walls are provided in the form of stripes, the nozzle moving relative to the plate so as to scan the plate with the nozzle positionally corresponding to a channel formed between adjacent partition walls,

• the ink expelling means comprising:
• a channel width measuring unit for a width of each channel between a pair of adjacent partition walls along a length of the channel;
• and
• an expelled ink amount adjusting means for adjusting an amount of phosphor ink expelled per unit length of the partition walls in accordance with the width of the channel that was measured by the channel width measuring unit.