Printer printhead
AssigneeHewlett-Packard Company
InventorsNaoto A. Kawamura, Timothy L. Weber
Life of this patent
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Abstract
An inkjet printing device is arranged to employ a first set of multiple nozzle drop generators activated by a first address signal and a second set of multiple nozzle drop generators activated by a second address signal. The multiple nozzles of each drop generator of the first set are arranged in a predetermined geometric pattern, each of which encompasses at least one nozzle of a drop generator of the second set. The ink ejectors of one drop generator of the first drop generator set are arranged in subgroups, one subgroup of which shares a switched power return with one subgroup of ink ejectors of one drop generator of the second drop generator set.
Claims22
An inkjet printing device comprising:
- a first drop generator activated by a first signal, said first drop generator including at least two associated nozzles and respective ink ejectors, each nozzle of said at least two associated nozzles of said first drop generator arranged in a first geometric pattern with each other nozzle of said first drop generator;
- a second drop generator activated by a second signal, said second drop generator including at least two associated nozzles and respective ink ejectors, each nozzle of said at least two nozzles of said second drop generator arranged in a second geometric pattern with each other nozzle of said second drop generator, wherein at least one nozzle associated with said second drop generator is disposed on or within the perimeter of said first geometric pattern of nozzles of said first drop generator;
- a first switch coupled to an ink ejector primitive signal input;
- a second switch and a third switch coupled to a primitive signal return;
- at least one ink ejector of said first drop generator ink ejectors coupled to both said first switch and said second switch;
- and
- at least one ink ejector of said second drop generator ink ejectors coupled to both said first switch and said third switch.
An inkjet printing device comprising:
- a first drop generator activated by a first signal, said first signal including an address signal and an ink ejector primitive signal and said first drop generator including at least two associated nozzles and respective ink ejectors, each nozzle of said at least two associated nozzles of said first drop generator arranged in a first geometric pattern with each other nozzle of said first drop generator;
- a second drop generator activated by a second signal, said second drop generator including at least two associated nozzles and respective ink ejectors, each nozzle of said at least two nozzles of said second drop generator arranged in a second geometric pattern with each other nozzle of said second drop generator;
- and
- wherein at least one nozzle associated with said second drop generator is disposed on or within a perimeter of said first geometric pattern of nozzles of said first drop generator.
An inkjet printing device comprising:
- a first drop generator switchably coupled to a first ink ejector primitive signal and switchably coupled to a first primitive return conductor independently from said switchable coupling to said first ink ejector primitive signal, said first drop ejector including at least two associated nozzles and respective ink ejectors;
- a second drop generator switchably coupled to said first ink ejector primitive signal and switchably coupled to a second primitive return conductor independently from said switchable coupling to said first ink ejector primitive signal, said second drop generator including at least two associated nozzles and respective ink ejectors;
- and
- said ink ejectors of said first drop generator arranged in a first geometric pattern and disposed adjacent said ink ejectors of said second drop generator arranged in a second geometric pattern.
A method of depositing ink dots on a medium by employing drop generators each having a plurality of cooperating ink ejectors, comprising the steps of:
- simultaneously activating all of the ink ejectors of a first drop generator to deposit a first plurality of ink dots in a first geometric pattern on the medium;
- simultaneously activating all of the ink ejectors of a second drop generator to deposit a second plurality of ink dots in a second geometric pattern on the medium, at least one dot of said second plurality of dots being deposited on or within a perimeter of said first geometric pattern;
- repositioning said first and second drop generators with respect to the medium;
- activating at least one but fewer than all of the ink ejectors of said first drop generator to deposit at least one ink dot on the medium;
- and
- activating at least one but fewer than all of the ink ejectors of said second drop generator to deposit at least one ink dot on the medium.
A method of depositing ink dots on a medium by employing drop generators each having a plurality of cooperating ink ejectors, comprising the steps of:
- simultaneously activating all of the ink ejectors of a first drop generator to deposit a first plurality of ink dots on the medium;
- simultaneously activating all of the ink ejectors of a second drop generator to deposit a second plurality of ink dots on the medium;
- repositioning said first and second drop generators with respect to the medium;
- activating at least one but fewer than all of the ink ejectors of said first drop generator to deposit at least one ink dot on the medium;
- and
- activating at least one but fewer than all of the ink ejectors of said second drop generator to deposit at least one ink dot on the medium.
A method of depositing ink dots on a medium by employing drop generators each having a plurality of cooperating ink ejectors, comprising the steps of:
- simultaneously activating all of the ink ejectors of a first drop generator to deposit a first plurality of ink dots in a first geometric pattern on the medium;
- simultaneously activating all of the ink ejectors of a second drop generator to deposit a second plurality of ink dots in a second geometric pattern on the medium such that at least one dot of said second plurality of dots is deposited on or within a perimeter of said first geometric pattern;
- repositioning said first and second drop generators with respect to the medium;
- and
- activating at least one but fewer than all of the ink ejectors of said first drop generator to deposit at least one ink dot on the medium.
A method of depositing ink dots on a medium by employing drop generators each having a plurality of cooperating ink ejectors that are energized by a first primitive signal applied between an input and a return, comprising the steps of:
- switchably coupling all of the ink ejectors of a first drop generator to an input of the first primitive signal and switchably coupling all of the ink ejectors of the first drop generator to the return to expel a first plurality of ink droplets;
- switchably coupling all of the ink ejectors of a second drop generator to the input of the first primitive signal and switchably coupling all of the ink ejectors of the second drop generator to the return to expel a second plurality of ink droplets;
- repositioning said first and second drop generators with respect to the medium;
- switchably coupling all of the ink ejectors of the first drop generator to an input of the first primitive signal and switchably coupling at least one but fewer than all of the ink ejectors of the first drop generator to the return to expel at least one ink droplet from the first drop generator;
- and
- switchably coupling all of the ink ejectors of the second drop generator to an input of the first primitive signal and switchably coupling at least one but fewer than all of the ink ejectors of the second drop generator to the return to expel at least one ink droplet from the second drop generator.
A method of manufacture of an inkjet printing device comprising the steps of:
- arranging simultaneously energized nozzles and ink ejectors of a first drop generator in a first geometric pattern with each other nozzle of said first drop generator;
- arranging simultaneously energized nozzles and ink ejectors of a second drop generator in a second geometric pattern with each other nozzle of said second drop generator in which at least one nozzle of said second drop generator is disposed on or within the perimeter of said first geometric pattern;
- coupling both at least one ink ejector of said fist drop generator ink ejectors and at least one ink ejector of said second drop generator ink ejectors to a first switch;
- coupling said first switch to an ink ejector primitive signal input;
- coupling said at least one ink ejector of said first drop generator ink ejectors to a second switch;
- coupling said at least one ink ejector of said second drop generator ink ejectors to a third switch;
- and
- coupling said second and said third switch to a primitive signal return.
Dependencies are inferred from the claim text.