초록 ▼

For an inkjet printhead (10) having at least one nozzle (24) and a nozzle opening (26) in the nozzle (24), a disk (28) having an off-center aperture (38) about the disk axis (X, Y) positioned over the nozzle opening (26), a system and method of compensating for the effects of defects in the inkjet p

For an inkjet printhead (10) having at least one nozzle (24) and a nozzle opening (26) in the nozzle (24), a disk (28) having an off-center aperture (38) about the disk axis (X, Y) positioned over the nozzle opening (26), a system and method of compensating for the effects of defects in the inkjet printhead (10) to alter the direction of ink drops (37) ejected from the nozzle (24). Initially, the printhead (10) is tested to determine the amount of compensation desired in the direction of ink (34) ejected from the nozzle opening (26). The method comprises the step of applying heat to at least one finger-like actuator (42), causing the thermal actuator (42) to deform semi-permanently. The method further comprises the step of sliding the disk (28) over the nozzle (24) so that the off-center aperture (38) traverses the nozzle opening (26) and causes the ink (34) ejected from the nozzle opening (26) to be deflected with regard to the desired amount of compensation. Once the disk (28) has been adjusted accordingly, the application of heat is ceased, causing the thermal actuator (42) to hold the disk (28) in the desired position.

대표청구항 ▼

For an inkjet printhead (10) having at least one nozzle (24) and a nozzle opening (26) in the nozzle (24), a disk (28) having an off-center aperture (38) about the disk axis (X, Y) positioned over the nozzle opening (26), a system and method of compensating for the effects of defects in the inkjet p

For an inkjet printhead (10) having at least one nozzle (24) and a nozzle opening (26) in the nozzle (24), a disk (28) having an off-center aperture (38) about the disk axis (X, Y) positioned over the nozzle opening (26), a system and method of compensating for the effects of defects in the inkjet printhead (10) to alter the direction of ink drops (37) ejected from the nozzle (24). Initially, the printhead (10) is tested to determine the amount of compensation desired in the direction of ink (34) ejected from the nozzle opening (26). The method comprises the step of applying heat to at least one finger-like actuator (42), causing the thermal actuator (42) to deform semi-permanently. The method further comprises the step of sliding the disk (28) over the nozzle (24) so that the off-center aperture (38) traverses the nozzle opening (26) and causes the ink (34) ejected from the nozzle opening (26) to be deflected with regard to the desired amount of compensation. Once the disk (28) has been adjusted accordingly, the application of heat is ceased, causing the thermal actuator (42) to hold the disk (28) in the desired position. ps applied to said substrate along lines traveled by each of said plurality of nozzles are increased as a function of a corresponding one of said output reduction factors. 2. The method of claim 1, wherein each of said output reduction factors is generated as a function of print density over a region covered by a plurality of nozzles. 3. The method of claim 1, wherein each of said output reduction factors is generated as a function of print density as measured by scanning a sample output at a resolution lower than the printing resolution of the print head. 4. The method of claim 1, wherein said numbers of drops are increased by printing selected dots along said lines twice using two distinct nozzles during two passes of said print head. 5. The method of claim 1, wherein said numbers of drops are increased by modifying screen values in a portion of a screen associated with locations to be printed by said plurality of nozzles.