CN101342812B - Ink jet head connection electric test method and adapted detection circuit thereof - Google Patents
Ink jet head connection electric test method and adapted detection circuit thereof Download PDFInfo
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- CN101342812B CN101342812B CN2007101278870A CN200710127887A CN101342812B CN 101342812 B CN101342812 B CN 101342812B CN 2007101278870 A CN2007101278870 A CN 2007101278870A CN 200710127887 A CN200710127887 A CN 200710127887A CN 101342812 B CN101342812 B CN 101342812B
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Abstract
The invention relates to a method for testing the electrical connection of an ink gun and is characterized in that when the ink gun is connected with the printing control terminal of a printer or before the ink gun begins printing, whether current flows through a plurality of jet holes in the ink gun is detected so as to judge if the ink gun is in good electric connection with the printing control terminal of the printer, based on which, users can make corresponding solutions if the electric connection is poor, thus improving the printing quality.
Description
Technical field
The relevant a kind of connection electric test method of the present invention refers to a kind of ink jet head connection electric test method and the testing circuit that is suitable for thereof especially.
Background technology
In recent years along with the fast development with world-wide web popularized of PC, ink-jet printer has become one of product indispensable in the personal computer equipment, produce bubble with at the general using heating plate with the heating template ink jet type printing technique of printing ink by nozzle ejection, because the life cycle of ink gun has certain time limit, therefore ink gun is designed to different main structure bodies usually with the ink gun bogey, to make things convenient for the user to change ink gun, wherein, ink-jet printer is the most common with use matrix form ink gun and multiplex's ink gun at present.
The perspective view of assembling between existing ink gun and the ink gun load bearing seat below will be described, see also Fig. 1, it is the structural representation of existing ink gun, as shown in the figure, existing ink gun 10 comprises a plurality of electronic signal input points 11 and a nozzle 12, wherein nozzle 12 has a plurality of spray orifices (not shown), is mainly used to carry out ink-jet.
See also Fig. 2, it is the structural representation of the ink gun load bearing seat of existing printer, as shown in the figure, ink gun load bearing seat 20 comprises body 21, electrically connect device 22 and a plurality of accommodation space 23, wherein electrical connection device 22 is arranged on the body 21 and has a plurality of contact points 221, contact point 221 is the electronic signal input point 11 corresponding settings with ink gun 10, be mainly used to control signal that the control circuit (not shown) with printer transmitted by contact point 221 and electronic signal input point 11 input ink guns 10 inside, and accommodation space 23 is to be used for ccontaining ink gun 10.
When the user inserts ink gun 10 accommodation space 23 of ink gun load bearing seat 20 and is fixedly arranged on the body 21, the electronic signal input point 11 of ink gun 10 can contact with the contact point 221 of electrical connection device 22 on the body 21, make control signal that the control circuit (not shown) of printer transmitted by contact point 221 and electronic signal input point 11 input ink guns 10 inside, to control a plurality of spray orifices ejection ink droplets.
The printer of existing use matrix form and multiplex type ink gun and the drive circuit schematic diagram between computer system below will be described respectively, see also Fig. 3, it is the printer of existing use matrix form ink gun and the drive circuit schematic diagram between computer system, as shown in the figure, printer 3 inside include prints control circuit board 30 and matrix form ink gun 31, as for printing between control circuit board 30 and the ink gun 31 is to electrically connect by a plurality of contact points 221 of electrical connection device shown in Figure 2 22 and electronic signal input point 11 shown in Figure 1, printing control circuit board 30 can be by processor 301, driving power supply circuit 302 and driving chip 303 constitute, wherein driving chip 303 is to electrically connect with processor 301 and driving power supply circuit 302, and processor 301 can see through USB (USB) transmission line and is connected with computer system 32, and 302 of driving power supply circuits are used to provide the drive voltage signal of the heater (not shown) that drives ink gun 31 inside.
When computer system 32 desires to carry out data printing action, the processor 301 of printing control circuit board 30 just can receive image data and the relevant treatment signal about desiring to print that computer system 32 is transmitted, and this image data is processed into 31 print data signals that can discern of ink gun, and produce a control signal according to this print data signal, and print data signal and control signal are transferred to driving chip 303 in the lump, also can receive the drive voltage signal that is continued transmission by driving power supply circuit 302 and drive chip 303, driving chip 303 will respond the triggering of this control signal and received print data signal and drive voltage signal are sent to ink gun 31 inside and drive ink gun 31, carry out ink-jet to print computer system 32 needed data to control corresponding spray orifice.
See also Fig. 4, it is the printer of existing use multiplex (MUX) ink gun and the drive circuit schematic diagram between computer system, as shown in the figure, printer 4 has the control circuit board of printing 40 and multiplex's ink gun 41, and can see through USB (USB) transmission line equally is connected with computer system 42, different is only to have processor 401 and driving power supply circuit 402 in the control printed circuit board 40, be integrated in the circuit that is arranged at ink gun 41 inside as for driving chip 303 shown in Figure 3, can reach the advantage that reduces the ink gun contact, therefore ink gun 41 is directly to receive data-signal by processor 401, and processor 401 transmission of data signals are to transmit with the mode that serial is imported into, the drive voltage signal of the heater that is used for driving ink gun 41 inside is provided to provide as for, 402 of driving power supply circuits.
When computer system 42 desires to carry out data printing start, processor 401 just can receive image data and the relevant treatment signal that computer system 42 is transmitted by USB (USB) transmission line, at this moment, the processing mode that is different from printer shown in Figure 33, processor 401 only is processed into 41 receptible print signals of ink gun with image data and relevant treatment signal, and produce a control signal, and print signal is transferred to ink gun 41 with control signal, this moment, the drive circuit (not shown) of ink gun 41 inside can will be converted into ink gun 41 required print data signal when really printing by the print signal that processor 401 is transmitted, simultaneously, drive circuit also can receive driving power supply circuit 402 the drive voltage signal that continues to transmit, carry out ink-jet so ink gun 41 just can be controlled corresponding spray orifice because of the control signal that received and drive voltage signal and print data signal.
Please consult Fig. 1 and Fig. 2 again, though the printer of the printer of existing use matrix form ink gun and existing use multiplex (MUX) ink gun all can reach the effect of print data, yet when ink gun 10 engages with the body 21 of ink gun load bearing seat 20, can be because the nearmis in the mechanism, or because for a long time plug causes 221 of the contact points of the electronic signal input point 11 of ink gun 10 and electrical connection device 22 can't driving fit or loose contact down, to cause the situation that the spray orifice of ink gun 10 inside can't spray printing, and cause the quality of printing to descend.
Therefore, how to develop a kind of ink jet head connection electric test method of above-mentioned existing techno-absence and testing circuit that is suitable for thereof of improving, real in pressing for the problem of solution at present.
Summary of the invention
Main purpose of the present invention is the testing circuit that a kind of ink jet head connection electric test method is provided and is suitable for, it is by being connected in the printer prints control end when ink gun or before ink gun begins to print action in advance, whether a plurality of spray orifices that detect in the ink gun have electric current to pass through, to judge the electric connection situation between ink gun and printer prints control end, can't detect connection state between ink gun and the printer prints control end to solve existing printer, between ink gun and printer prints control end because of the nearmis in the mechanism, or because for a long time plug down and can't driving fit or during loose contact, the user can't learn and continue to use printer, cause degradation shortcoming under the print quality.
For reaching above-mentioned purpose, of the present invention one implements the sample attitude than broad sense electrically connects method of testing for a kind of ink gun is provided, in order to detect the electric connection situation between ink gun and the printer prints control end, wherein the printer prints control end has driving power supply circuit and processor, and a plurality of power supply signal lines that ink gun has a plurality of address wires and is provided with a plurality of address-line array, method of testing comprises the following step at least: (a) transmit the first power supply signal line of first high potential signal to a plurality of power supply signal lines, and transmit first low-potential signal to remaining power supply signal line; (b) transmit in regular turn second high potential signal to a plurality of address wires one of them, and transmit second low-potential signal to not receiving the remaining address line of second high potential signal; (c) judge that according to detecting one of them result who whether has electric current to pass through of a plurality of address wires whether the first power supply signal line is connected with the printer prints control end, and judged result is deposited in the processor; (d) differentiate all a plurality of power supply signal lines and whether all finished detection, if not, then repeating step (a) to (c) detects the power supply signal line that all the other do not detect, if, then finish the test of a plurality of power supply signal lines, and begin to detect a plurality of address wires and whether be connected with the printer prints control end; (e) transmit first address wire of second high potential signal to a plurality of address wires, and transmit second low-potential signal to remaining address wire; (f) transmit first high potential signal to a plurality of power supply signal lines by the driving power supply circuit; (g) judge that according to detecting one of them result who whether has electric current to pass through of a plurality of power supply signal lines whether first address wire is connected with the printer prints control end, and deposit judged result in processor; (h) differentiate all a plurality of address wires and whether all finished detection, if not, then repeating step (e) to (g) detects the address wire that all the other do not detect, if, then finish the test of a plurality of address wires, with the stored result of foundation processor, come whether to come in contact bad situation between identifying ink nozzle and the printer prints control end.
According to conception of the present invention, wherein step (a) to (d) can be exchanged with step (e) to (h).
According to conception of the present invention, wherein the printer prints control end is the printer control circuit plate, in order to receive and to handle the print data that electronic installation transmitted.
According to conception of the present invention, wherein first high potential signal and first low-potential signal are exported by the driving power supply circuit.
According to conception of the present invention, wherein second high potential signal and second low-potential signal are exported by processor.
According to conception of the present invention, wherein ink gun is matrix form ink gun or multiplex's ink gun.
For reaching above-mentioned purpose, of the present invention another implemented the sample attitude than broad sense and electrically connected method of testing for a kind of ink gun is provided, in order to detect the electric connection situation between multiplex's ink gun and the printer prints control end, wherein the printer prints control end has driving power supply circuit and processor, and multiplex's ink gun have a plurality of address wires and with the vertically disposed a plurality of power supply signal lines of a plurality of address wires, method of testing comprises the following step at least: (a) transmit first address wire of first high potential signal to a plurality of address wires, and transmit first low-potential signal to remaining address wire; (b) transmit second high potential signal to a plurality of power supply signal lines by the driving power supply circuit; (c) judge that according to detecting one of them result who whether has electric current to pass through of a plurality of power supply signal lines whether first address wire is connected with the printer prints control end, and judged result is deposited in the processor; (d) differentiate all a plurality of address wires and whether all finished detection, if not, then repeating step (a) to (c) detects the address wire that all the other do not detect; (e) differentiate the stored result of processor and whether show that a plurality of address wires all do not have with the printer prints control end and be connected, if then finish detection, and learn multiplex's ink gun and the loose contact of printer prints control end.
According to conception of the present invention, wherein one of them is when being connected with the printer prints control end if the differentiation result of step (e) is for the stored result of processor shows a plurality of address wires, whether then begin to detect a plurality of power supply signal lines is connected with the printer prints control end, at least comprise the following step: (f) transmit the first power supply signal line of second high potential signal to a plurality of power supply signal lines, and transmit second low-potential signal to remaining power supply signal line; (g) transmit in regular turn first high potential signal to a plurality of address wires one of them, and transmit first low-potential signal to not receiving the remaining address line of first high potential signal; (h) judge that according to detecting one of them result who whether has electric current to pass through of a plurality of address wires whether the first power supply signal line is connected with the printer prints control end, and judged result is deposited in the processor; (i) differentiate all a plurality of power supply signal lines and whether all finished detection, if not, then repeating step (f) to (h) detects the power supply signal line that all the other do not detect, if, then finish the test of a plurality of power supply signal lines, with the stored result of foundation processor, distinguish between multiplex's ink gun and the printer prints control end whether come in contact bad situation.
According to conception of the present invention, wherein first high potential signal and first low-potential signal are exported by processor driving power supply circuit.
According to conception of the present invention, wherein second high potential signal and second low-potential signal are exported by the driving power supply circuit.
For reaching above-mentioned purpose, the present invention provides a kind of testing circuit in addition, in order to detect the electric connection situation between ink gun and the printer prints control end, wherein the printer prints control end has processor and driving power supply circuit, processor internal preset base current signal, driving power supply circuit outputting drive voltage signal, it comprises: resistor, it is connected with ink gun; First change-over switch, it is connected with processor and driving power supply circuit; Analog-digital converter, it is connected with the resistor and first change-over switch; Wherein, the triggering of the control signal that the first change-over switch answer processor is exported and conducting, so that drive voltage signal is sent to ink gun by resistor, and between first change-over switch and resistor, produce analog current signal, analog current signal will convert the digital current signal to and will be sent in the processor by analog-digital converter, so that processor compares digital current signal and base current signal, to learn between ink gun and the printer prints control end whether come in contact bad situation according to comparative result.
According to conception of the present invention, wherein the printer prints control end also has the normal operation circuit, itself and processor, driving power supply and resistor electrically connect, when being used to ink gun and carrying out normal ink-jet program, the triggering of answer processor and conducting are so that drive voltage signal transfers to ink gun.
According to conception of the present invention, wherein the normal operation circuit is second change-over switch, the triggering of the control signal that answer processor transmitted and conducting.
According to conception of the present invention, wherein the printer prints control end also has the driving chip, it is connected with resistor, processor and second change-over switch of testing circuit, in order to handle and to be sent to ink gun with processor and by the signal that second change-over switch is transmitted, carry out inkjet printing with the control ink gun, or accept processor and by first change-over switch and signal that resistor transmitted, so that the electric connection situation between ink gun and the printer prints control end is detected.
According to conception of the present invention, wherein the printer prints control end is the printer control circuit plate, in order to receive and to handle the print data that electronic installation transmitted.
Description of drawings
Fig. 1 is the structural representation of existing ink gun.
Fig. 2 is the structural representation of the ink gun load bearing seat of existing printer.
Fig. 3 is the printer of existing use matrix form ink gun and the drive circuit schematic diagram between computer system.
Fig. 4 is the printer of existing use multiplex type ink gun and the drive circuit schematic diagram between computer system.
Fig. 5 is the printer of use matrix form ink gun of the present invention's first preferred embodiment and the drive circuit schematic diagram between computer system.
Fig. 6 is the printer of use multiplex type ink gun of the present invention's second preferred embodiment and the drive circuit schematic diagram between computer system.
Fig. 7 is the structural representation of the ink-jet driving circuit of ink gun inside.
Fig. 8 is the flow chart that the matrix form ink gun of the present invention's the 3rd preferred embodiment electrically connects test.
Fig. 9 is the flow chart that multiplex's ink gun of the present invention's second preferred embodiment electrically connects test.
The specific embodiment
Some exemplary embodiments that embody feature of the present invention and advantage will be described in detail in the explanation of back segment.Be understood that the present invention can have various variations on different aspects, its neither departing from the scope of the present invention, and explanation wherein and diagram, be when the usefulness that explain in itself, but not in order to restriction the present invention.
See also Fig. 5, it is the printer of use matrix form ink gun of the present invention's first preferred embodiment and the drive circuit schematic diagram between computer system, as shown in the figure, printer 5 inside include a printer prints control end and a matrix form ink gun 51, wherein the printer prints control end can be a printer control circuit board 50, but not as limit, ink gun 51 has a plurality of spray orifices, and is by electrically connecting with a plurality of contact points (not shown) that electrical connection device comprised of printer control circuit plate 50 electric connections and a plurality of electronic signal input points (not shown) of ink gun 51 between printer control circuit plate 50 and the ink gun 51.
In present embodiment, printer control circuit plate 50 can be by processor 501, driving power supply circuit 502, drive chip 503, testing circuit 504 and normal operation circuit 505 constitute, wherein drive chip 503 and processor 501, testing circuit 504 and normal operation circuit 505 electrically connect, and can passing through USB (USB) transmission line, processor 501 is connected with an electronic installation, can be a computer system 52, but, be used to provide the drive voltage signal of the heater 701 (as shown in Figure 7) that drives ink gun 51 inside as for 502 of driving power supply circuits not as limit.
Wherein, normal operation circuit 505 is with processor 501, driving power supply circuit 502 and drive chip 503 electric connections, and mainly switching switch 5051 by one is constituted, it is as driving power supply circuit 502 and drive path between the chip 503 when ink gun 51 carries out normal inkjet printing program, the triggering of the control signal that main answer processor 501 is transmitted and conducting drives chip 503 so that the drive voltage signal that driving power supply circuit 502 is exported can transfer to.
In addition, testing circuit 504 is by change-over switch 5041, resistor 5042 and analog-digital converter 5043 are formed, wherein change-over switch 5041 and processor 501, driving power supply circuit 502, resistor 5042 and analog-digital converter 5043 electrically connect, when printer 5 in detected state following time, as driving power supply circuit 502 and drive the actuating switch of 503 of chips, 5042 of resistors and change-over switch 5041, analog-digital converter 5043 and driving chip 503 electrically connect, and analog-digital converter 5043 is connected between change-over switch 5041 and the resistor 5042, and electrically connect with processor 501, in order to analog signal changed into data signal and to be sent to processor 501.
Because printer 5 inside must provide a power supply just can keep the running that drives chip 503 to driving chip 503, therefore when ink gun 51 is not carried out the printing action, the change-over switch 5041 and the node H between the resistor 5042 of testing circuit 504 will sense a base current value, this base current value will convert a base current signal to and will be stored in the processor 501 by analog-digital converter 5043, in order to as the basis for estimation that electrically connects situation between follow-up judgement ink gun 31 and the printer control circuit plate 50.
When printer 5 desires to detect the situation that electrically connects between printer control circuit plate 50 and the ink gun 51, processor 501 can be exported one respectively and control signal to testing circuit 504 and normal operation circuit 505, so that the change-over switch 5041 of testing circuit 504 is because of the triggering conducting of this control signal, the change-over switch 5051 of normal operation circuit 505 then is in the state of not conducting because of the control of this control signal, so driving power supply circuit 502 can be with a drive voltage signal by change-over switch 5041, resistor 5042 is sent to and drives chip 503, and be sent to ink gun 51 by driving chip 503, at this moment, analog-digital converter 5043 can receive an analog current signal by the node H between change-over switch 5041 and resistor 5042, and convert this analog current signal to a digital current signal, and be sent to processor 501 inside.
When testing circuit 504 detect finish and the user also solve come in contact bad problem after, processor 501 will transmit another more respectively and control signal to testing circuit 504 and normal operation circuit 505, so that the change-over switch 5041 of testing circuit 504 is in not conducting state because of this control signal, the change-over switch 5051 of normal operation circuit 505 then can be because of the triggering conducting of control signal, make ink gun 51 can begin normally to carry out inkjet printing, at this moment, image data and relevant treatment signal that the computer system 52 that just can receive processor 501 is transmitted about desiring to print, and this image data is processed into 51 print data signals that can discern of ink gun, and produce a control signal according to this print data signal, and print data signal and control signal are transferred to driving chip 503 in the lump, also can receive the drive voltage signal that is continued transmission by driving power supply circuit 502 and drive chip 503 by change-over switch 5051, driving chip 503 will respond the triggering of this control signal and received print data signal and drive voltage signal are sent to ink gun 51 inside and drive ink gun 51, carry out ink-jet to print computer system 52 needed data to control corresponding spray orifice.
See also Fig. 6, it is the printer of use multiplex (MUX) ink gun of the present invention's second preferred embodiment and the drive circuit schematic diagram between computer system, as shown in the figure, printer 6 has printer control circuit plate 60 and multiplex's ink gun 61, ink gun 61 has a plurality of spray orifices equally, and is by electrically connecting with a plurality of contact points that electrical connection device comprised of printer control circuit plate 60 electric connections and a plurality of electronic signal input points of ink gun 61 between tabulating machine control circuit board 60 and the ink gun 61.
In present embodiment, printer control circuit plate 60 can be by processor 601, driving power supply circuit 602, testing circuit 603 and normal operation circuit 604 constitute, testing circuit 603 is by change-over switch 6031 equally, resistor 6032 and analog-digital converter 6033 are formed, and normal operation circuit 604 can be made of a switching switch 6041 equally, wherein, processor 601, driving power supply circuit 602, the change-over switch 6041 of normal operation circuit 604, the change-over switch 6031 of testing circuit 603, the circuit design principle of resistor 6032 and analog-digital converter 6033 and the purpose that can reach and effect are to be specified in first preferred embodiment, therefore repeat no more.
What present embodiment was different with first preferred embodiment is, do not comprise any driving chip in the printer control circuit plate 60 of present embodiment, drive circuit has been integrated in the circuit that is arranged at ink gun 61 inside, can reach the advantage that reduces ink gun 61 contacts, therefore ink gun 61 is directly to receive data-signal by processor 601, and processor 601 transmission of data signals are to transmit with the mode that serial is imported into, as for, under ink gun 61 normal operations, 602 of driving power supply circuits continue to provide the drive voltage signal of the heater 701 (as shown in Figure 7) that is used for driving ink gun 61 inside by change-over switch 61, otherwise, when ink gun 61 just has been assembled in the mechanism of printer 6 or before desiring to carry out the inkjet printing program, in order to ensure print quality, processor 601 is with 603 runnings of detection trigger circuit, carry out with the connection status that detects between printer control circuit plate 60 and the ink gun 61, driving power supply circuit 602 then provides the drive voltage signal that is used for detecting by the change-over switch 6031 and the resistor 6032 of testing circuit 603.
In addition, when ink gun 61 is not carried out any printing action, the base current value that is sensed in the change-over switch 6031 and the node H between the resistor 6032 of testing circuit 603 is the required power supply of ink gun 61 internal drive chips (not shown) running, and this base current value will convert a base current signal to by analog-digital converter 6033 equally and be stored in the processor 601, in order to the basis for estimation as electric connection situation between follow-up judgement ink gun 61 and the printer control circuit plate 60.
When printer 6 desires to detect the situation that electrically connects between printer control circuit plate 60 and the ink gun 61, processor 601 can be exported one respectively and control signal to testing circuit 603 and normal operation circuit 604, so that the change-over switch 6031 of testing circuit 603 is because of the triggering conducting of this control signal, the change-over switch 6041 of normal operation circuit 604 then is in the state of not conducting because of the control of this control signal, so driving power supply circuit 602 can be with a drive voltage signal by change-over switch 6031, resistor 6032 directly is sent to ink gun 61, at this moment, analog-digital converter 6033 can receive an analog current signal by the node H between change-over switch 6031 and resistor 6032, and convert this analog current signal to a digital current signal, and be sent to processor 601 inside.
When testing circuit 603 detect finish and the user also solve come in contact bad problem after, processor 601 will transmit another more respectively and control signal to testing circuit 603 and normal operation circuit 604, so that the change-over switch 6031 of testing circuit 603 is in not conducting state because of this control signal, the change-over switch 6041 of normal operation circuit 604 then can be because of the triggering conducting of control signal, make ink gun 61 can begin normally to carry out inkjet printing, at this moment, image data and relevant treatment signal that the computer system 61 that just can receive processor 601 is transmitted about desiring to print, because drive circuit is to be arranged at ink gun 61 inside, therefore processor 601 only is processed into 61 receptible print signals of ink gun with image data and relevant treatment signal, and produce a control signal, and print signal is transferred to ink gun 61 with control signal, the drive circuit of ink gun 61 inside can be converted into the print signal that is transmitted by device 601 by oneself ink gun 61 required print data signal when really printing, and drive circuit also can receive driving power supply circuit 602 by the drive voltage signal that change-over switch 6041 continued to transmit, and carries out ink-jet so drive circuit just can be controlled corresponding spray orifice because of the control signal that received and drive voltage signal and print data signal.
See also Fig. 7, it is the structural representation of the ink-jet driving circuit of ink gun inside, as shown in the figure, ink-jet driving circuit 70 has many address wire A1～AN and many power supply signal line PS1～PSN that are array format, and all be connected with a heater 701 on the interface point of each address wire A1～AN and power supply signal line PS1～PSN, power supply signal line that connects in order to pass through and address wire are come control heater 701 runnings, this Drive and Control Circuit 70 is by as the processor 51 described in the present invention's first preferred embodiment and second preferred embodiment, 61 transmit a print data signal gives a plurality of address wire A1～AN, and pass through as the driving power supply circuit 502 in the present invention's first preferred embodiment and second preferred embodiment, 602 transmit drive voltage signal to power supply signal line PS1～PSN, and control corresponding heater 701 according to this print data signal and drive voltage signal and carry out ink-jet.
Below will cooperate Fig. 7 to illustrate that respectively ink gun of the present invention electrically connects the method flow of test.See also Fig. 8 and cooperate Fig. 5, wherein Fig. 8 is the flow chart of the matrix form ink gun electric connection test of the present invention's the 3rd preferred embodiment, as shown in the figure, at first just be assembled in the mechanism of printer 5 or before desiring to carry out the inkjet printing program when ink gun 51, processor 501 will transmit respectively and control signal to testing circuit 504 and normal operation circuit 505, begin to detect (step S81) to close this normal operation circuit 505 and to drive testing circuit 504, next, the first power supply signal line PS1 at a plurality of power supply signal PS1～PSN detects earlier, make driving power supply circuit 502 continue to transmit high potential signal to the first a power supply signal line PS1, wherein high potential signal is that the heating resistor that drives heater 701 inside carries out the required drive voltage signal of ink-jet, and continue to transmit a low-potential signal to other power supply signal line PS2～PSN, come again, processor 501 can transmit in regular turn a high potential signal give a plurality of address wire A1～AN one of them, wherein this high potential signal is the required print data signal of change-over switch conducting that drives heater 701 inside, and transmits the remaining address line (step S82) that a low-potential signal gives not receive high potential signal simultaneously.
Next, differentiate one of them result who whether has electric current to pass through of a plurality of address wire A1～AN differentiate the first power supply signal line PS1 whether with printer control circuit plate 50 electrically connects of printer 5, be about to the measured analog current signal of node H between change-over switch 5041 and the resistor 5042, be sent to analog-digital converter 5043 and convert a digital current signal to, and being sent to processor 501 inner base current signals with processor 501 inner institute default storage makes comparisons, if a digital current signal comparative result is arranged is greater than this base current signal, one of them can detect electric current then to represent a plurality of address wire A1～AN, with regard between the decidable first power supply signal line PS1 and the printer control circuit plate 50 there be normal connection the (step S83) thus, and will differentiate the result and deposit processor 501 (step S89) in.
Then, judge whether all a plurality of power supply signal line PS1～PSN have all finished detection, if not, then repeating to get back to step S82 detects the power supply signal line that all the other do not detect, if, then finish the test of a plurality of power supply signal line PS1～PSN, and begin to detect a plurality of address wire A1～AN and whether electrically connect (step S84) with printer control circuit plate 50.
Behind step S85, the first address wire A1 at a plurality of address wire A1～AN detects, processor 501 can transmit a high potential signal and give the first address wire A1, and transmit a low-potential signal to address wire A2～AN, and driving power supply circuit 502 can transmit high potential signal to all power supply signal line PS1～PSN (step S85), and differentiate a plurality of one of them result that whether have electric current to pass through of power supply signal line PS1～PSN differentiate the first address wire A1 whether with printer control circuit plate 50 electrically connects (step S86), it is described to see also step 83 as for judgment mode, and will differentiate the result and deposit (step S89) in the processor 501 in.Behind step S86, differentiate all a plurality of address wire A1～AN and whether all finished detection, if not, then getting back to step S85 detects the address wire that does not detect, if, then finish the test (step S87) of a plurality of address wire A1～AN, testing process promptly finishes thus, can be according to the stored result of processor 501, come to come in contact bad situation between some contact point of identifying ink nozzle 51 and printer control circuit plate 50.
Certainly, in this preferred embodiment, testing circuit 504 also can detect the step of a plurality of address wire A1～AN earlier, after treating that a plurality of address wire A1～AN has all detected, continue to detect a plurality of power supply signal line PS1～PSN again, the step S82 to S84 that also is about to a plurality of power supply signal line of above-mentioned detection PS1～PSN can exchange with the step S85 ~ S87 that detects survey a plurality of address wire A1～AN, can't influence testing result.
See also Fig. 9 and cooperate Fig. 6, wherein Fig. 9 is the flow chart of multiplex's ink gun electric connection test of the present invention's second preferred embodiment, as shown in the figure, because the printer 6 of present embodiment is to use multiplex's ink gun 61, therefore processor 601 transmission of data signals to ink gun 61 is to transmit with the mode that serial is imported into, so need to detect earlier a plurality of address wire A1～AN, step is as follows: at first, processor 601 cuts out this normal operation circuit 604 with control and drives testing circuit 603 and begins to detect (step S901), then, the first address wire A1 at a plurality of address wire A1～AN detects, processor 601 can transmit high potential signal and give the first address wire A1, and transmit a low-potential signal to address wire A2～AN, and driving power supply circuit 602 can transmit high potential signal to all a plurality of power supply signal line PS1～PSN (step S902).Next, differentiate a plurality of one of them result that whether have electric current to pass through of power supply signal line PS1～PSN differentiate the first address wire A1 whether with printer prints control circuit 60 electrically connects (step S903), the step 83 that sees also Fig. 8 as for judgment mode is described, and will differentiate the result and deposit in the processor 601.
Then, behind step S903, differentiate all a plurality of address wire A1～AN and whether all finished detection, if not, then get back to step S902 all the other address wires that do not detect are detected, if then finish the test of a plurality of address wire A1～AN.Next, whether differentiate whole a plurality of address wire A1～AN according to processor 601 stored results does not all have and prints control circuit board 60 and be connected, if, because power supply signal line PS1～PSN will detect fully side less than, therefore the detection of testing circuit 603 finishes, and learn ink gun 61 and printer control circuit plate 60 loose contacts (step S910), if not, then begin to detect a plurality of power supply signal line PS1～PSN and whether electrically connect with printer control circuit plate 60.
Afterwards, the first power supply signal line PS1 to a plurality of power supply signal PS1～PSN detects, make driving power supply circuit 602 continue to transmit high potential signal to the first a power supply signal line PS1, and transmit a low-potential signal to power supply signal line PS2～PSN, processor 601 then transmits a high potential signal in regular turn gives a plurality of address wire A1～AN, and transmits the remaining address line (step S906) that a low-potential signal gives not receive high potential signal simultaneously.Next, differentiate one of them result who whether has electric current to pass through of a plurality of address wire A1～AN differentiate the first power supply signal line PS1 whether with printer control circuit plate 60 electrically connects (step S907), and will differentiate the result and deposit (step S910) in the processor 601 in.
Then, judge whether all a plurality of power supply signal lines have all finished detection, if not, then get back to step S906 and detect, if then finish the test (step S908) of a plurality of power supply signal line PS1～PSN at all the other power supply signal lines that do not detect, thus, the testing process of testing circuit 603 is a detection of end, can come identifying ink nozzle 61 and printer control circuit plate 60 whether to come in contact bad situation according to the stored result of processor 601.
In sum, before ink jet head connection electric test method of the present invention and the testing circuit that is suitable for thereof can or be desired to carry out the inkjet printing program in the mechanism that just has been assembled in printer when ink gun, can judge the situation whether loose contact is arranged between ink gun and the printer prints control end by ink jet head connection electric test method, allow the user can get rid of the relevant connection problem, and then promote print quality.Therefore, ink jet head connection electric test method of the present invention and the testing circuit that is suitable for thereof have the value of industry.
Claims (5)
1. testing circuit, in order to detect the electric connection situation between an ink gun and the printer prints control end, wherein this printer prints control end has a processor and a driving power supply circuit, this processor internal preset one base current signal, this driving power supply circuit is exported a drive voltage signal, it is characterized in that comprising:
One resistor, it is connected with this ink gun;
One first change-over switch, it is connected with this processor and this driving power supply circuit;
One analog-digital converter, it is connected with this resistor and this first change-over switch;
Wherein, this first change-over switch is the triggering of the control signal exported of this processor of response and conducting, so that this drive voltage signal is sent to this ink gun by this resistor, and between this first change-over switch and this resistor, produce an analog current signal, this analog current signal will convert a digital current signal to and will be sent in this processor by this analog-digital converter, so that this processor compares this digital current signal and this base current signal, to learn between this ink gun and this printer prints control end whether come in contact bad situation according to comparative result.
2. testing circuit according to claim 1, it is characterized in that this printer prints control end also has a normal operation circuit, itself and this processor, this driving power supply and this resistor electrically connect, when being used to this ink gun and carrying out normal ink-jet program, respond the triggering of this processor and conducting, so that this drive voltage signal transfers to this ink gun.
3. testing circuit according to claim 1 is characterized in that this normal operation circuit is one second change-over switch, responds the triggering of the control signal that this processor transmits and conducting.
4. testing circuit according to claim 3, it is characterized in that this printer prints control end also has one and drives chip, it is connected with this resistor, this processor and this second change-over switch of this testing circuit, in order to handle and to be sent to ink gun with this processor and by the signal that this second change-over switch is transmitted, carry out inkjet printing with the control ink gun, or accept this processor and by this first change-over switch and signal that resistor transmitted, so that the electric connection situation between this ink gun and this printer prints control end is detected.
5. testing circuit according to claim 1 is characterized in that this printer prints control end is a printer control circuit board, in order to receive and to handle the print data that an electronic installation is transmitted.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101278870A CN101342812B (en) | 2007-07-10 | 2007-07-10 | Ink jet head connection electric test method and adapted detection circuit thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101278870A CN101342812B (en) | 2007-07-10 | 2007-07-10 | Ink jet head connection electric test method and adapted detection circuit thereof |
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| CN101342812A CN101342812A (en) | 2009-01-14 |
| CN101342812B true CN101342812B (en) | 2010-07-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102259509A (en) * | 2011-05-24 | 2011-11-30 | 陈先举 | Needle printer component detection apparatus |
| CN102259508A (en) * | 2011-05-24 | 2011-11-30 | 李传荣 | Part detection device for ink-jet printer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1289683A (en) * | 1999-09-28 | 2001-04-04 | 威硕科技股份有限公司 | Method and device for testing IC of ink-jet head |
| EP1445109A1 (en) * | 2003-02-05 | 2004-08-11 | International United Technology Co., Ltd. | Ink jet printhead identification circuit and method |
| CN1850512A (en) * | 2005-04-22 | 2006-10-25 | 佳能株式会社 | Ink jet printing head and ink jet printing apparatus using the same |
| CN1990255A (en) * | 2005-12-26 | 2007-07-04 | 精工爱普生株式会社 | Printing material container, and board mounted on printing material container |
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2007
- 2007-07-10 CN CN2007101278870A patent/CN101342812B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1289683A (en) * | 1999-09-28 | 2001-04-04 | 威硕科技股份有限公司 | Method and device for testing IC of ink-jet head |
| EP1445109A1 (en) * | 2003-02-05 | 2004-08-11 | International United Technology Co., Ltd. | Ink jet printhead identification circuit and method |
| CN1850512A (en) * | 2005-04-22 | 2006-10-25 | 佳能株式会社 | Ink jet printing head and ink jet printing apparatus using the same |
| CN1990255A (en) * | 2005-12-26 | 2007-07-04 | 精工爱普生株式会社 | Printing material container, and board mounted on printing material container |
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| CN101342812A (en) | 2009-01-14 |
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