CN100340406C - Method and device for correcting driving signal of printing head - Google Patents
Method and device for correcting driving signal of printing head Download PDFInfo
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- CN100340406C CN100340406C CNB2004100041493A CN200410004149A CN100340406C CN 100340406 C CN100340406 C CN 100340406C CN B2004100041493 A CNB2004100041493 A CN B2004100041493A CN 200410004149 A CN200410004149 A CN 200410004149A CN 100340406 C CN100340406 C CN 100340406C
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Abstract
The present invention provides a method and a device for correcting driving signals of a print head. The method has the steps that a plurality of driving signals are respectively used for driving the print head to print a plurality of test patterns on a print medium; one test pattern with good print quality is selected from a plurality of test patterns; a good driving signal corresponding to the test pattern with good print quality is judged, and the good driving signal is used for driving the print head to print data.
Description
Technical field
The invention provides a kind of method and apparatus of setting the driving signal of printhead, refer in particular to the method and apparatus that a kind of printed test pattern is proofreaied and correct the driving signal of printhead.
Background technology
Ink-jet printer provides the print quality of high level with reasonable prices, has become the most popular PRN device of epoch, and along with the quick progress of science and technology, pursuing higher print quality has been the target that the epoch industrial circle is endeavoured to research and develop.Generally speaking, ink-jet printer utilizes a carrier (carriage) to carry an ink jet-print head (ink-jet printhead), ink jet-print head is to utilize heating component (for example heating resistor) that ink moment is imposed Gao Re and produces bubble, and and then the ejection ink, so it is the uniformity of ink spray volume has very big influence to print quality, particularly all the more so for the ink jet-print head of fine definition.In general, ink jet-print head includes an ejection layer and a chip, includes a plurality of spray orifices on the ejection layer, then includes a plurality of heating components and a plurality of drive circuit on the chip, and wherein each spray orifice is corresponding to a heating component and one drive circuit.Drive circuit is used for controlling the electric current of the heating component that connects by it, so that heating component is to ink heating and generation bubble, so when bubble produced, ink promptly can be pushed and be sprayed by spray orifice.To bestow what of ink energy relevant with heating component for what of quantity of ink that spray orifice sprays, bestow an amount of energy in ink and desire to control heating component effectively, so that the ink spray volume of each spray orifice reaches unanimity, except the size that must consider each spray orifice whether consistent, whether its circuit characteristic consistent during fabrication need to note each heating component and each drive circuit.
Known as industry, ink-jet printer just can make the ink droplet with a suitable capacity spray via spray orifice after ink one predetermined power need be provided, that is ink-jet printer must be exported appropriate driving signal so that heating ink reaches this predetermined power.If the energy of ink-jet printer heating ink is not enough to reach this predetermined power very little, it is low excessively then may to cause ink droplet to leave the speed of spray orifice, therefore make this ink droplet arrive one when printing medium out of position, cause print quality not good at last.In addition, the energy of ink-jet printer heating ink is crossed the low above-mentioned capacity minimizing of leaving the ink droplet of spray orifice that also can cause, so can worsen print quality further.On the contrary, if the energy of ink-jet printer heating ink surpasses this predetermined power too much and far, the temperature that then can cause heating resistor is too high and reduce its life-span, and when heating resistor lost efficacy, ink cartridges just can't be used, in addition, if the energy of ink-jet printer heating ink is too many, then the ink droplet speed of leaving spray orifice also can be influenced and reduce, and therefore can cause print quality degradation.As mentioned above, how ink-jet printer exports required driving signal just becomes an important topic to provide suitable energy to give ink via heating resistor.
Generally speaking, the employed driving signal of known ink-jet printer is fixing, therefore the particular ink casket (cartridge) that is suitable for must be installed, so that known ink-jet printer can be correctly heated ink in this ink cartridges to spray required ink droplet according to its driving signal on known ink-jet printer.Yet, for known ink-jet printer, ink cartridges is interchangeable assembly, because the corresponding fixed waveform of above-mentioned driving signal, therefore in order to make each ink cartridges have close print quality at same known ink-jet printer, so the component characteristic of each ink cartridges (for example resistance of heating resistor) is convergence very, that is when producing the ink cartridges of same specification, must improve the quality of ink cartridges and eliminate bad ink cartridges, so can cause production cost to increase because higher quality requires.In addition, owing to the original paper of ink cartridges can produce unavoidable error because of technology basically, in other words, the fixed drive signal that known ink-jet printer provided may be neither be best driving signal for the ink jet-print head on each ink cartridges, so can't reach optimum print quality can cause known ink-jet printer to carry out printing the time.
Summary of the invention
Therefore main purpose of the present invention is to provide the method and apparatus of the driving signal of a kind of printed test pattern to proofread and correct printhead, to address the above problem.
According to of the present invention, the method of the driving signal of a kind of correction printhead (printhead) is disclosed, it includes a plurality of driving signals of use and drives this printhead respectively to print a plurality of test patterns (test pattern) on a printing medium, from these a plurality of test patterns, choose one and print the better quality test pattern, judge the pairing preferred drive signal of the preferable test pattern of this print quality, and use this preferred drive signal to drive this printhead prints data.
In addition, the present invention also provides a kind of printing equipment, and it includes a printhead (printhead), and it includes a plurality of nozzles; And a control circuit, be electrically connected to this printhead, be used for using a plurality of driving signals to drive on this printhead at least one nozzle resistance respectively and print a plurality of test patterns on the medium to print one.This printing equipment is chosen the pairing preferred drive signal of a printing better quality test pattern in these a plurality of test patterns, and uses this preferred drive signal to drive this printhead prints data.
The present invention drives signal calibration method and comes dynamically to proofread and correct respectively required driving voltage of signals level or pulse width according to the ardware feature of different ink jet-print heads, therefore when changing the ink cartridges of an ink-jet printer, the present invention drives signal calibration method and just can start immediately proofreading and correct the various parameters of the required driving signal of ink jet-print head on this newly-increased ink cartridges, so that the driving signal that this ink jet-print head is actual can be used when printing operation after the correction produces optimum print quality.
Description of drawings
Fig. 1 is for using the function block schematic diagram that the present invention drives the ink-jet printer of signal calibration method.
Fig. 2 is the waveform schematic diagram of driving signal shown in Figure 1.
Fig. 3 drives first kind of operation chart of signal calibration method for the present invention.
Fig. 4 is the enlarged diagram of oblique line shown in Figure 3.
Fig. 5 is the schematic diagram that is formed on the oblique line of different print areas shown in Figure 3.
Fig. 6 drives second kind of operation chart of signal calibration method for the present invention.
Fig. 7 is the enlarged diagram of color lump shown in Figure 4.
Fig. 8 drives the waveform schematic diagram that employed the third test of signal calibration method drives signal for the present invention.
Fig. 9 drives the waveform schematic diagram that employed the 4th kind of test of signal calibration method drives signal for the present invention.
Figure 10 drives the third operation chart of signal calibration method for the present invention.
The reference numeral explanation
10 ink-jet printers, 12 control circuits
14 power circuits, 16 ink jet-print heads
18 memories, 19 image extraction modules
20 drive circuits, 22 heating components
24 ejection layer, 26 transistors
28 heating resistors, 30 spray orifices
32 data, 34 media
35a, 35b, test drive signal 36a, 36b, print area
35c、35d、39a、39b、 36c、36d、
39c、39d、41a、41b、 44a、44b、
41c、41d、42a、42b、 44c
42c、42d
37a, 37b, 37c oblique line 38 ink droplets
40a, 40b, 40c, color lump 46a, 46b, 46c, test pattern
48 46d
50 straight lines
The specific embodiment
See also Fig. 1, Fig. 1 is for using the function block schematic diagram that the present invention drives the ink-jet printer 10 of signal calibration method.Ink-jet printer 10 includes a control circuit (controller) 12, one power circuits 14, one ink jet-print heads 16, and a memory 18, and an image extraction module 19.Ink jet-print head 16 is provided with one drive circuit 20, one heating components 22, and an ejection layer 24, and wherein drive circuit 20 is used for driving heating component 22 so that ink droplet can be via ejection layer 24 outputs.Drive circuit 20 comprises a plurality of transistors 26, and 22 of heating components comprise a plurality of heating resistors (heaterresistor) 28, and ejection layer 24 includes a plurality of spray orifices (nozzle) 30.In addition, memory 18 is as a buffer (buffer), be used for keeping in data 32 to be printed, for example data 32 are the print data (print data) that a host computer is exported, therefore control circuit 12 just drives the printing that the spray orifice 30 on the ink jet-print head 16 is correlated with at a medium 34 according to data 32, that is ink-jet printer 10 reaches corresponding spray orifice 30 print datas of driving on medium 34 via the above-mentioned heating resistor 28 of heating.In the present embodiment, the printing pattern that image extraction module 19 (a for example CCD sensing component) is used for detecting on the medium 34 produces corresponding image, and its function describes in detail in the back.
When ink-jet printer 10 starts printing, control circuit 12 reads the data 32 of being kept in the memory 18 (a for example dynamic random access memory) earlier, then just according to data 32 produce control signal S1 to drive circuit 20 with whether conducting of control transistor 26, for example transistor 26 is a N type metal-oxide semiconductor transistor (NMOS), and the grid of control signal S1 input transistors 26, so the voltage level of the grid of the just controlled system transistor 26 of control signal S1 and determine whether form passage in the transistor 26.In addition, power circuit 14 is electrically connected to the drain electrode of transistor 26, and heating resistor 28 is electrically connected to the source electrode of transistor 26, so when transistor 26 controlled signal S1 conductings, drive circuit 20 just can produce one and drive signal S2 to heating component 22, that is the driving voltage Vp that power circuit 14 is provided just can drive heating resistor 28 via driving signal S2, at last, after heating resistor 28 driving inks reached a predetermined power, ink droplet just can be via corresponding spray orifice 30 outputs.As mentioned above, driving signal S2 puts on and is controlled by control signal S1 the heat time heating time of heating resistor 28, and drive the efficiency of heating surface that signal S2 puts on heating resistor 28 and controlled by driving voltage Vp, in other words, control signal S1 and driving voltage Vp can influence the waveform of driving signal S2.In addition, known as industry, also include a preheat pulse (pre-heat pulse) among the driving signal S2, be used for making the ink droplets of different spray orifices 30 last outputs can not produce the uneven situation of size.
See also Fig. 2, Fig. 2 is the waveform schematic diagram of driving signal S2 shown in Figure 1.In Fig. 2, drive signal S2 and include a preheat pulse P1 and a main driving pulse (main driving pulse) P2, wherein the duration T 1 of preheat pulse P1 is less than the duration T 2 of main driving pulse P2, and has a time interval dT between preheat pulse P1 and the main driving pulse P2.As previously mentioned, the driving voltage Vp that the voltage level of driving signal S2 is exported by supply unit 14 is controlled, so the equal corresponding driving voltage Vp of the voltage level of preheat pulse P1 and main driving pulse P2.If the duration T 2 of main driving pulse P2 is of a specified duration excessively, then heating resistor 28 can provide the ink excessive power, and if the duration T 2 of main driving pulse P2 is too short, then heating resistor 28 just can't provide ink enough energy.If the duration T 1 of preheat pulse P1 is long, then the bubble in the ink is unstable and droplet size that influence spray orifice 30 outputs produces change, and is too short as if the duration T 1 of preheat pulse P1 on the contrary, then can cause the poor effect of preheating.In addition, if the time interval dT between preheat pulse P1 and the main driving pulse P2 is too short, then preheat pulse P1 and main driving pulse P2 can be considered a pulse and drive heating resistor 28 continuously in time T 1+T2, therefore can cause the situation of heating resistor 28 superheated inks.
Comprehensively above-mentioned, if it is not good to drive the waveform of signal S2, then ink jet-print head 16 just can't make one to print that formed figure has good print quality on the medium.Because duration T 1, T2, time interval dT, and driving voltage Vp all can influence the waveform that drives signal S2, produce with ink jet-print head 16 by control circuit 12 control power circuits 14 and drive signal S2, so driving signal calibration method, the present invention just can control duration T 1 via control circuit 12, T2, time interval dT, and driving voltage Vp, order about ink jet-print head 16 and on medium 34, form a plurality of test patterns to produce different driving signal S2, the best that therefore just can determine to be applicable to the driving signal S2 of ink jet-print head 16 is set, and its operation is described below.
See also Fig. 3, Fig. 3 drives first kind of operation chart of signal calibration method for the present invention.Ink jet-print head 16 respectively by the test of different wave drive signal 35a, 35b, 35c, 35d is driven and on medium 34 a plurality of print areas (swath) 36a, 36b, 36c, 36d print a test pattern respectively, and test drives signal 35a, 35b, 35c, 35d and drives the employed first kind of test driving signal of signal calibration method for the present invention.As shown in Figure 3, this test pattern is three oblique line 37a, 37b, 37c, wherein the corresponding different respectively color of three oblique line 37a, 37b, 37c.For example ink-jet printer 10 is a colour print device, that is the ink cartridges of ink-jet printer 10 includes cyan (cyan) ink, magenta (magenta) ink, and yellow (yellow) ink, this ink-jet printer 10 is used cmy color and is united the printing color image; So in the present embodiment, three oblique line 37a, 37b, 37c be respectively by the spray orifice of corresponding cyan, the spray orifice of corresponding magenta ink, and the ink droplet of the spray orifice of corresponding yellow ink output forms.
As shown in Figure 3, the preheat pulse that each test drives signal 35a, 35b, 35c, 35d has the identical duration significantly, preheat pulse equated with time interval between the main driving pulse, and power circuit 14 provides same drive voltage Vp to give each test to drive signal 35a, 35b, 35c, 35d, and main difference is that main driving pulse that each test drives signal 35a, 35b, 35c, 35d has the different duration.As shown in Figure 3, the duration of the main driving pulse of test driving signal 35a is the shortest, and the duration of the main driving pulse of test driving signal 35d is the longest, therefore the present invention drives signal calibration method and is: by judging print area 36a, 36b, 36c, the last formed four groups of test pattern print results of 36d, selective printing person the best in quality is used as being applicable among all test driving signal 35a, 35b, 35c, the 35d preferred drive signal of ink jet-print head 16.
See also Fig. 4, Fig. 4 is the enlarged diagram of oblique line 37a shown in Figure 3.In fact oblique line 37a is formed by a plurality of ink droplet 38, wherein test drives on the signal 35a Continuous Drive ink jet-print head 16 three ink droplets 38 of a spray orifice 30 outputs to constitute a strigula, then test drive signal 35a again on the Continuous Drive ink jet-print head 16 three ink droplets 38 of adjacent spray orifice 30 outputs to constitute another strigula.So as shown in Figure 4, each strigula just can form the figure of oblique line 37a shown in Figure 3 at last, for oblique line 37b, 37c, it also is formed among the print area 36a according to same operation, and in addition, the oblique line on other print area 36b, 36c, the 36d is to form according to same operation.So, just can determine to be applicable to the optimal drive signal of ink jet-print head 16 by relatively print area 36a, 36b, 36c, the last formed test pattern of 36d.For instance, if the duration deficiency of main driving pulse, then heating resistor 28 can't provide spray orifice 30 ejection ink droplets required enough energy, therefore causes spray orifice 30 not spray ink droplet or the ejection ink droplet is too little, or the later arrival medium 34 of ink droplet and be offset the precalculated position significantly; So oblique line 37a, 37b, 37c just may be out of shape the oblique line that becomes distortion or interrupt because of the drop location skew.Similarly, if the duration of main driving pulse is excessive, then heating resistor 28 provides above the required enough energy of spray orifice 30 ejection ink droplets, also can therefore cause spray orifice 30 ejection ink droplets too big, or ink droplet is when arriving medium 34 too early and be offset the precalculated position, so also can make oblique line 37a, 37b, 37c because drop location skew and distortion becomes the oblique line of distortion.See also Fig. 5, Fig. 5 is formed on different print area 36a, oblique line 37a, the 37a ' of 36b, 36c, 37a shown in Figure 3 " schematic diagram.For convenience of explanation, Fig. 5 only shows three oblique line 37a, 37a ', 37a ".As shown in Figure 5, because heating resistor 28 can't provide spray orifice 30 ejection ink droplets required enough energy, therefore cause print area 36a bend 37a ' " to seem intermittent compared to print area 36b bend 37a; In addition, because heating resistor 28 provides above the required enough energy of spray orifice 30 ejection ink droplets, therefore print area 36c bend 37a is obviously than print area 36b bend 37a, and " torsional deformation serious is so the user can select the driving signal of corresponding print area 36b to be used as the driving signal of ink jet-print head 16.
In other words, the present invention drives signal calibration method can judge test pattern print result among print area 36a, 36b, 36c, the 36d by the user, selection has minimum ink drop offset, that is lines obviously do not interrupt and the test of torsional deformation degree reckling drives signal, are used as actual after a while a dozen printings that print of ink-jet printer 10 according to employed driving signal.
See also Fig. 6, Fig. 6 drives second kind of operation chart of signal calibration method for the present invention.Ink jet-print head 16 respectively by the test of different wave drive signal 39a, 39b, 39c, 39d is driven and on medium 34 a plurality of print area 36a, 36b, 36c, 36d print a test pattern respectively, wherein test drives signal 39a, 39b, 39c, 39d and drives the employed second kind of test driving signal of signal calibration method for the present invention.As shown in Figure 6, this test pattern is three color lump 40a, 40b, 40c, wherein three color lump 40a, 40b, 40c distinguish corresponding different colors, for example three color lump 40a, 40b, 40c are respectively by the spray orifice of corresponding cyan, the spray orifice of corresponding magenta ink, and the spray orifice of corresponding yellow ink forms.Significantly, each test drives signal 39a, 39b, 39c, the preheat pulse of 39d has the identical duration, test drives signal 39a, 39b, 39c, the main driving pulse of 39d has the identical duration, and power circuit 14 provides same drive voltage Vp to give each test driving signal 39a, 39b, 39c, 39d, and main difference is that each test drives signal 39a, 39b, 39c, among the 39d, time interval dT between preheat pulse and the main driving pulse is all unequal, as shown in Figure 3, preheat pulse and the time interval dT between the main driving pulse that test drives signal 39a are the shortest, and preheat pulse and the time interval dT between the main driving pulse of test driving signal 35d are the longest, therefore the present invention drives signal calibration method just via print area 36a, 36b, 36c, the last formed test pattern print result of 36d decides all tests to drive signal 39a, 39b, 39c, be applicable to the preferred drive signal of ink jet-print head 16 among the 39d.
See also Fig. 7, Fig. 7 is the enlarged diagram of color lump 40a shown in Figure 6.In fact color lump 40a is formed by a plurality of ink droplet 38, two adjacent ink droplet 38a in this color lump, 38b is two different spray orifice 30a by three spray orifices 30 in interval on the ink jet- print head 16,30b sprays, wherein test driving signal 39a drives spray orifice 30a, 30b non-adjacent on the ink jet-print head 16 respectively and exports ink droplet 38 respectively, and so the ink droplet 38 that can utilize non-adjacent spray orifice 30 to be exported successfully detects the distribution scenario of ink droplet 38 in color lump 40a.For color lump 40b, 40c, it also is formed among the print area 36a according to same operation, and in addition, the color lump on other print area 36b, 36c, the 36d also is to form according to same operation.Then, judge print area 36a, 36b, 36c, the last formed test pattern print result of 36d, selective printing person the best in quality is used as all tests and drives the optimal drive signal that is applicable to ink jet-print head 16 among signal 39a, 39b, 39c, the 39d.
For instance, if dT blanking time is too short, then to be formed by stacking be the print signal of a broad for preheat pulse P1 and main driving pulse P2, and the physical location of ink droplet 38 can depart from ideal position, so ink droplet 38 can be distributed among the color lump 40a brokenly; In addition, if dT blanking time is long, then because of the pre-heat effect deficiency, then ink droplet 38 sizes can change, and produce different color densities, and then the color uniformity of color lump 40a is worsened.Therefore just can drive signal, and the driving signal that this is chosen promptly is used as ink-jet printer 10 actual a dozen printings that print according to employed driving signal via the test that the color uniformity of inspecting color lump 40 print results or droplet size are chosen the corresponding preferable uniformity.
In addition, test shown in Figure 6 drives signal 39a, 39b, 39c, 39d also can be used to drive ink jet-print head 16 and produces test pattern (that is oblique line 37a shown in Figure 3,37b, 37c), user's side-play amount of departing from ideal position according to the ink droplet of test pattern is chosen and is had minimum offset then, that is lines obviously do not interrupt and the test of torsional deformation degree reckling drives signal, and the driving signal that this is chosen promptly is used as ink-jet printer 10 actual a dozen printings that print according to employed driving signal, also can reach the present invention and proofread and correct the purpose that drives signal.
See also Fig. 8, Fig. 8 drives the waveform schematic diagram that employed the third test of signal calibration method drives signal for the present invention.In Fig. 8, different tests drives signal 41a, 41b, 41c, 41d drives ink jet-print head 16 to proofread and correct the operation that drives signal, significantly, each test drives signal 41a, 41b, 41c, the preheat pulse of 41d has the identical duration, preheat pulse equated with time interval between the main driving pulse, and main driving pulse has the identical duration, main difference is that control circuit 12 driving power circuits 14 provide different driving voltage Vp to give each test and drive signal 41a, 41b, 41c, 41d, as shown in Figure 8, the voltage level that test drives signal 41a is minimum, and the voltage level of test driving signal 41d is the highest. Test drives signal 41a, 41b, 41c, 41d and can be used to drive ink jet-print head 16 and produce test pattern shown in Figure 3 (that is oblique line 37a, 37b, 37c), user's side-play amount of departing from ideal position according to the ink droplet of test pattern is chosen and is had minimum offset then, that is lines obviously do not interrupt and the test of torsional deformation degree reckling drives signal, and the driving signal that this is chosen promptly is used as ink-jet printer 10 actual a dozen printings that print according to employed driving signal.
See also Fig. 9, Fig. 9 drives the waveform schematic diagram that employed the 4th kind of test of signal calibration method drives signal for the present invention.In Fig. 9, different tests drives signal 42a, 42b, 42c, 42d driving ink jet-print head 16 to proofread and correct the operation that drives signal, significantly, the preheat pulse of each test driving signal 42a, 42b, 42c, 42d equated with the time interval between the main driving pulse, main driving pulse has the identical duration, and power circuit 14 provides same drive voltage Vp to give each test to drive signal 42a, 42b, 42c, 42d, and main difference is that preheat pulse has the different duration.As shown in Figure 9, the preheat pulse that test drives signal 42a has the shortest duration, and the preheat pulse of test driving signal 42d has the longest duration.Test drives signal 42a, 42b, 42c, 42d and can be used to drive ink jet-print head 16 and produce test pattern shown in Figure 6 (that is color lump 40a, 40b, 40c), then according to the color lump uniformity, droplet size or color density choose a best test drive signal with as ink-jet printer 10 actual a dozen printings that print according to employed driving signal.
See also Figure 10, Figure 10 drives the third operation chart of signal calibration method for the present invention.Ink jet-print head 16 respectively by the test of different wave drive signal 35a, 35b, 35c, 35d is driven and on medium 34 same print area 44a, 44b, 44c print a plurality of test pattern 46a, 46b, 46c, 46d respectively.As shown in figure 10, each test pattern 46a, 46b, 46c, 46d include a color lump 48 and many straight lines 50, and the formation of color lump 48 and straight line 50 is identical with the formation of color lump 40a, 40b shown in Figure 6,40c and oblique line 37a, 37b shown in Figure 3,37c respectively, therefore no longer repeats to give unnecessary details at this.In addition, the ink-jet printer 10 of present embodiment is a colour print device, and it is used the cmy color system and comes the printing color image, that is the ink cartridges of ink-jet printer 10 can include cyan, magenta ink, and yellow ink, so the test pattern among the three print area 44a, 44b, 44c is just distinguished corresponding cyan, magenta, and it is yellow, therefore can reach and proofread and correct the output cyan respectively, magenta ink, and the purpose of the required driving signal of the spray orifice of yellow ink.
As previously mentioned, each test drives among signal 35a, 35b, 35c, the 35d, and main difference is that the main driving pulse of each test driving signal 35a, 35b, 35c, 35d has the different duration.So, if the duration of main driving pulse is not enough or the duration main driving pulse is excessive, then heating resistor 28 can't provide the enough energy of ink droplet that spray orifice 30 is exported, therefore just cause ink droplet too little easily, and ink droplet can be offset the precalculated position when arriving medium 34 significantly, so for straight line 50, it just may interrupt because ink droplet can't leave spray orifice 30, and be out of shape because of the drop location skew.In other words, the present invention drives signal calibration method and can utilize the straight line 50 of each test pattern 46a, 46b, 46c, 46d to detect the side-play amount that ink droplet departs from ideal position, choose then and have minimum offset, that is the test of straight line 50 torsional deformation degree recklings drives signal and is used as ink-jet printer 10 actual a dozen printings that print according to employed driving signal.
In addition, the present invention drives signal calibration method also can use test driving signal 39a shown in Figure 6,39b, 39c, 39d drives ink jet-print head 16 and produces test pattern 46a shown in Figure 10,46b, 46c, 46d, then according to test pattern 46a, 46b, 46c, ink droplet on the straight line 50 of 46d departs from the side-play amount (straight line 50 torsional deformation degree) of ideal position, the uniformity of color lump 48, color density or droplet size choose a best test drive signal as ink-jet printer 10 actual a dozen printings that print according to employed driving signal, also can reach the present invention and proofread and correct the purpose that drives signal.
Similarly, the present invention drives signal calibration method also can use test driving signal 41a shown in Figure 8,41b, 41c, 41d drives ink jet-print head 16 and produces test pattern 46a shown in Figure 10,46b, 46c, 46d, then according to test pattern 46a, 46b, 46c, ink droplet on the straight line 50 of 46d departs from the side-play amount of ideal position, that is straight line 50 torsional deformation degree recklings choose a best test drive signal as ink-jet printer 10 actual a dozen printings that print according to employed driving signal, also can reach the present invention and proofread and correct the purpose that drives signal.In addition, the present invention drives signal calibration method and also can use test shown in Figure 9 and drive signal 42a, 42b, 42c, 42d and drive ink jet-print head 16 and produce test pattern 46a, 46b, 46c, 46d shown in Figure 10, then according to the uniformity, color density or the droplet size of the color lump 48 of test pattern 46a, 46b, 46c, 46d choose a best test drive signal as ink-jet printer 10 actual a dozen printings that print according to employed driving signal, all can reach the present invention and proofread and correct the purpose that drives signal.
Please note, the present invention drives the applied test pattern of signal calibration method and is not confined to only comprise aforementioned color lump and straight line, that is the present invention drives signal calibration method and can use other fc-specific test FC pattern, every this test pattern can allow the user via the torsional deformation degree of its lines of perusal, the color uniformity of color lump; So can be with the naked eye easily the test pattern of the print quality quality of discrimination test pattern get final product.
In addition, but the present invention drive signal calibration method also other instrument assist the user to choose the test of required the best to drive signal, as shown in Figure 1, the printing pattern that image extraction module 19 can detect on the medium 34 produces corresponding image, so this image can provide the 12 required epoch of control circuit to carry out the image processing to analyze the printing situation on the medium 34.For instance, after ink jet-print head 16 printed test pattern, image extraction module 19 just can start a plurality of images that extract should a plurality of test pattern print results, control circuit 12 utilizes an image processing program to analyze the drop location of this test pattern (that is side-play amount of judgement test pattern cathetus) then, droplet size, and ink droplet concentration etc., last ink-jet printer 10 just can be chosen the test pattern with optimal printing quality according to above-mentioned judgment principle, and the driving signal that simultaneously the pairing test of this test pattern is driven signal sets and be ink jet-print head 16 is finished the automatic correction program of ink-jet printer 10.
Compared to known technology, the present invention drives test that signal calibration method utilizes different wave and drives signal and drive an ink jet-print head print a plurality of test patterns on a medium, choose test pattern then with optimal printing quality, a dozen printings of printing that with the pairing test driving of this test pattern signal sets are this ink jet-print head at last are according to required driving signal, that is the present invention drives signal calibration method and comes dynamically to proofread and correct respectively required driving voltage of signals level or pulse width according to the ardware feature of different ink jet-print heads, therefore when the user changes the ink cartridges of an ink-jet printer, the present invention drives signal calibration method and just can start immediately proofreading and correct the various parameters of the required driving signal of ink jet-print head on this newly-increased ink cartridges, so that the driving signal that this ink jet-print head is actual can be used when printing operation after the correction produces optimum print quality.
The above only is preferred embodiment of the present invention, and all equivalences of carrying out according to claim of the present invention change and revise, and all should belong to covering scope of the present invention.
Claims (16)
1. method of proofreading and correct the driving signal of ink jet-print head, it includes:
(a) use a plurality of driving signals to drive this ink jet-print head respectively according to test data and print a plurality of test patterns to have on the print media of a plurality of print areas one, wherein, this test data is corresponding at least one desirable straight line;
(b) of poor quality according between this a plurality of test patterns of printing and this ideal line chosen a printing better quality test pattern from these a plurality of test patterns;
(c) judge the pairing preferred drive signal of the preferable test pattern of this print quality; And
(d) use this preferred drive signal to drive this ink jet-print head print data.
2. the method for claim 1, wherein, each test drives signal and includes a main driving pulse, and these a plurality of tests drive the corresponding same voltage level of main driving pulse of signal, and these a plurality of tests drive the corresponding different pulse widths of main driving pulse of signal.
3. the method for claim 1, wherein, each test drives signal and includes a main driving pulse, and these a plurality of tests drive the corresponding same pulse width of main driving pulse of signal, and these a plurality of tests drive the corresponding different voltage levels of main driving pulse of signal.
4. the method for claim 1, wherein, each test drives signal and includes a main driving pulse and a preheat pulse, these a plurality of tests drive the corresponding same pulse width of main driving pulse of signal, these a plurality of tests drive the corresponding same pulse width of preheat pulse of signals, and corresponding different time delays between preheat pulse that should a plurality of tests driving signals and the main driving pulse.
5. the method for claim 1, wherein, each test drives signal and includes a main driving pulse and a preheat pulse, these a plurality of tests drive the corresponding same pulse width of main driving pulse of signal, corresponding same time delay between the preheat pulse that these a plurality of tests drive signals and the main driving pulse, and the different pulse widths of preheat pulse correspondence that should a plurality of tests driving signals.
6. the method for claim 1, wherein this test pattern is printable goes out many first color straight lines, and step (b) is chosen in these many first color straight lines side-play amount reckling as the preferable test pattern of this print quality.
7. the method for claim 1, wherein, the corresponding at least one block of this test data, and step (b) test pattern that decides this to choose according to the uniformity of these a plurality of test patterns, concentration according to these a plurality of test patterns decides this test pattern of choosing, or big according to ink droplet in these a plurality of test patterns
For a short time the test pattern that decides this to choose.
8. the method for claim 1, wherein, the corresponding a plurality of blocks of this test data, these a plurality of blocks are corresponding different colours respectively, and step (b) test pattern that decides this to choose according to the uniformity of these a plurality of test patterns, concentration according to these a plurality of test patterns decides this test pattern of choosing, or the test pattern that droplet size decides this to choose in these a plurality of test patterns of foundation.
9. the method for claim 1, wherein this printhead is an ink jet-print head, and this printhead is printed these a plurality of test patterns in the printing zone on this medium in step (a).
10. method as claimed in claim 11, wherein, each test drives signal and includes a main driving pulse, and these a plurality of tests drive the corresponding same voltage level of main driving pulse of signal, and these a plurality of tests drive the corresponding different pulse widths of main driving pulse of signal.
11. method as claimed in claim 11, wherein, each test drives signal and includes a main driving pulse, and these a plurality of tests drive the corresponding same pulse width of main driving pulse of signal, and these a plurality of tests drive the corresponding different voltage levels of main driving pulse of signal.
12. method as claimed in claim 11, wherein, each test drives signal and includes a main driving pulse and a preheat pulse, these a plurality of tests drive the corresponding same pulse width of main driving pulse of signal, these a plurality of tests drive the corresponding same pulse width of preheat pulse of signals, and corresponding different time delays between preheat pulse that should a plurality of tests driving signals and the main driving pulse.
13. method as claimed in claim 11, wherein, each test drives signal and includes a main driving pulse and a preheat pulse, these a plurality of tests drive the corresponding same pulse width of main driving pulse of signal, corresponding same time delay between the preheat pulse that these a plurality of tests drive signals and the main driving pulse, and the different pulse widths of preheat pulse correspondence that should a plurality of tests driving signals.
14. method as claimed in claim 11, wherein, a test data correspondence is line at least always, and step (b) test pattern that decides this to choose according to the side-play amount of these a plurality of test patterns and this straight line.
15. the method for claim 1, wherein, the corresponding at least one block of this test data, and step (b) test pattern that decides this to choose according to the uniformity of these a plurality of test patterns, concentration according to these a plurality of test patterns decides this test pattern of choosing, or the test pattern that droplet size decides this to choose in these a plurality of test patterns of foundation.
16. an inkjet-printing device, it includes:
One ink jet-print head, it includes a plurality of nozzles; And
One control circuit is electrically connected to this ink jet-print head, is used for using a plurality of driving signals to drive on this ink jet-print head at least one nozzle resistance respectively and prints a plurality of test patterns on the medium to print one, and this test pattern comprises a plurality of first color straight lines; With
One image extraction module is electrically connected to this control circuit, is used for extracting to a plurality of images that should a plurality of test patterns;
Wherein, this control circuit is chosen the pairing preferred drive signal of a printing better quality test pattern that has minimum of poor quality between the first color straight line and the ideal line in these a plurality of test patterns, and uses this preferred drive signal to drive this ink jet-print head print data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100041493A CN100340406C (en) | 2004-02-13 | 2004-02-13 | Method and device for correcting driving signal of printing head |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100041493A CN100340406C (en) | 2004-02-13 | 2004-02-13 | Method and device for correcting driving signal of printing head |
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| CN1654213A CN1654213A (en) | 2005-08-17 |
| CN100340406C true CN100340406C (en) | 2007-10-03 |
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| CNB2004100041493A Expired - Fee Related CN100340406C (en) | 2004-02-13 | 2004-02-13 | Method and device for correcting driving signal of printing head |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5130747B2 (en) * | 2007-03-02 | 2013-01-30 | 富士ゼロックス株式会社 | RECORDING MEDIUM, PRINT CONTROL DEVICE, PRINT SYSTEM, AND PRINT CONTROL PROGRAM |
| JP6779081B2 (en) * | 2016-09-28 | 2020-11-04 | キヤノン株式会社 | Recording element substrate, recording head, and recording device |
| JP2018167466A (en) * | 2017-03-29 | 2018-11-01 | ブラザー工業株式会社 | Communication device and recording apparatus with the same |
| JP6976078B2 (en) * | 2017-05-12 | 2021-12-01 | キヤノン株式会社 | Element board, recording head, and recording device |
| JP6950568B2 (en) * | 2018-02-21 | 2021-10-13 | セイコーエプソン株式会社 | How to drive the liquid injection device and the liquid injection device |
| CN114953730B (en) * | 2021-02-25 | 2023-06-09 | 深圳市汉森软件有限公司 | Method, device, equipment and storage medium for calibrating code disc pulse signals of printing system |
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| EP0729115A2 (en) * | 1995-02-23 | 1996-08-28 | Canon Kabushiki Kaisha | Method and apparatus for calibrating a print head, print head, and printer |
| EP0925925A2 (en) * | 1997-12-26 | 1999-06-30 | Canon Kabushiki Kaisha | Method for correcting a recording head, correction apparatus therefor, recording head corrected by use of such apparatus, and recording apparatus using such recording head |
| JP2001138498A (en) * | 1999-11-10 | 2001-05-22 | Seiko Epson Corp | Method for driving head of ink-jet recording apparatus, ink-jet recording apparatus, and recording medium |
| JP2003053969A (en) * | 2001-08-10 | 2003-02-26 | Hitachi Koki Co Ltd | Control method for driving inkjet head |
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|---|---|---|---|---|
| EP0729115A2 (en) * | 1995-02-23 | 1996-08-28 | Canon Kabushiki Kaisha | Method and apparatus for calibrating a print head, print head, and printer |
| EP0925925A2 (en) * | 1997-12-26 | 1999-06-30 | Canon Kabushiki Kaisha | Method for correcting a recording head, correction apparatus therefor, recording head corrected by use of such apparatus, and recording apparatus using such recording head |
| JP2001138498A (en) * | 1999-11-10 | 2001-05-22 | Seiko Epson Corp | Method for driving head of ink-jet recording apparatus, ink-jet recording apparatus, and recording medium |
| JP2003053969A (en) * | 2001-08-10 | 2003-02-26 | Hitachi Koki Co Ltd | Control method for driving inkjet head |
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