CN1255280C - Driver of ink-jet head with temp sensing function - Google Patents
Driver of ink-jet head with temp sensing function Download PDFInfo
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- CN1255280C CN1255280C CN 00128689 CN00128689A CN1255280C CN 1255280 C CN1255280 C CN 1255280C CN 00128689 CN00128689 CN 00128689 CN 00128689 A CN00128689 A CN 00128689A CN 1255280 C CN1255280 C CN 1255280C
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Abstract
The present invention relates to a driving circuit with the temperature measurement function for an ink gun. A temperature meter and a heater are arranged at jet holes, the heater is used for heating ink in order that the ink is jetted from the jet holes, and the temperature meter can measure the temperature of the ink at the jet holes. The present invention comprises a temperature measurement module and a heating module, wherein the temperature measurement module is composed of the temperature meter and a temperature checking brake; the temperature meter is arranged at the jet holes, can generate temperature measurement signals corresponding to the temperature of the jet holes, can select the signal to feed the signal back to the temperature checking brake, and can detect the temperature measurement signals; the heating module is composed of the heater and a temperature actuating gate; the heater is arranged at the jet holes. After selected signals and temperature actuating signals are fed back to the heating module, the present invention can be used for printing.
Description
Technical field
The present invention relates to a kind of heating and temperature measuring equipment, particularly a kind of heating and temperature measuring equipment that drives ink gun that be applicable to.
Background technology
In recent years, under the drive of high-tech industry, all electronic correlation industries are all flourish, every modern product, and as computer, computer periphery, household electrical appliances and business machine etc., though function or outward appearance, than significant progress was all arranged in the past.With the printer is example, just only several years, printing technique just from striker formula, the progress of black and white laser to color jet-ink and color laser etc., be at a tremendous pace.At present the general user of family because it is few to print the chance of heap file, is with when choosing printer, for taking into account the two balance of print quality and price, still with color inkjet printer at first; If budget is abundant, just buy more monochrome laser printer in addition with usefulness as file printout.Present printer market is to fragment a country by rivaling warlords, and it is very fierce to compete, and each big factory research and development usefulness of racking one's brains invariably is better, and has more the machine of price advantage, to win consumer's favor, increases occupation rate of market.Therefore, how at the limited budgetary enhancing efficiency that makes product, be the common striving directions of all researchers.
Ink-jet printer on the market adopts bubble type or piezoelectric ink-jet head to finish print job on the paper so that ink is disseminated to mostly at present.For the bubble type ink gun, its main member includes heater, ink and spray orifice.The effect of heater is heating ink producing bubble, and bubble is risen gradually push ink greatly, and the ink that is pushed is then discharged via spray orifice, drops on and forms ink dot on the paper.When printing, only need control the concentration and the drop point of ink, numerous ink dots can be combined into required literal or figure.
The print quality of printer has very direct relation with its resolution, at present the ABC of machine of color jet-ink tabulating machine, resolution is about 720 * 720dpi or 1440 * 720dpi, and resolution is high more, and the expression ink dot is careful more, and the careful degree of ink dot is then relevant with its cohesive force.For instance, if it is identical to form the quantity of ink of ink dot, the big person of ink dot cohesive force then, its scope to external diffusion is less, and it is just comparatively careful to show; Otherwise, the little person of the cohesive force of ink dot, then its scope to external diffusion is also bigger, shows just comparatively coarse.Hence one can see that, and the cohesive force of ink dot has directly influenced print quality.With general bubble type ink-jet technology, if driving a certain specific spray orifice, desire makes its ejection ink, the corresponding heater of meeting this spray orifice of first activation produces bubble so that the interior ink temperature of the inkjet ink chamber under this spray orifice raises.At this moment, the viscosity of ink is understood the rising of Yin Wendu and is reduced; If temperature control is bad, make ink by superheated, just can cause the ink viscosity to be lower than normal level, and make and formed ink dot cohesive force variation when printing reduced resolution.On the other hand, under normal condition, during heating ink, the ink temperature in the inkjet ink chamber can rise earlier, and then the ink that is ejected of partial heat energy is taken away, and the temperature of ink in the inkjet ink chamber is descended; But, when taking place that ink cartridge low or ink are not discharged and wait abnormality, promptly can cause the interior ink temperature of inkjet ink chamber to be higher than expection, make the ink viscosity be lower than normal level.In addition, the part spray orifice is owing to frequent ejection ink, so the ink temperature in this inkjet ink chamber is higher, viscosity is lower; Bu Fen spray orifice does not spray ink for a long time in addition, so the ink temperature in this inkjet ink chamber is lower, viscosity is higher.More than all phenomenons all cause ink viscosity instability, remote-effects print quality.Therefore, how exactly to the monitoring ink temperature, just become to improve the key of print quality.
With reference to Fig. 1 a, it illustrates the control calcspar of traditional ink-jet printer.Ink-jet printer 10 comprises actuating module 11 and ink spray module 15, in the time of data need being printed, control device 12 just can be according to data content accessory drive 13, to choose in the signal 14 feed-in nozzle arrays 16, at this moment, nozzle array 16 promptly can be according to choosing signal 14, with heater 19 heating of correspondence, to print off data.On the other hand, can utilize thermistor be looped around part spray orifice in the nozzle array 16 around, as temperature measuring equipment 17, in order to detecting the spray orifice temperature, and with this Temperature Datum feedback control device 12, the reference frame during as temperature control.With reference to Fig. 1 b, it illustrates the cross-section structure of the spray orifice of nozzle array 16 among Fig. 1 a.As shown in the figure, heater 19 is positioned near the spray orifice 18, in order to the heating of the ink in the inkjet ink chamber 21, produces bubble 20; Bubble 20 is pushed the ink in the inkjet ink chamber 21, makes it from spray orifice 18 ejections, can fall within and form ink dot on the paper.Hereinafter, will at how choose corresponding heater ink is sprayed from spray orifice, describe in detail with reference to Fig. 2 according to choosing signal 14.
With reference to Fig. 2, it illustrates the circuit diagram of the nozzle array 16 among Fig. 1 a.As shown in the figure, nozzle array 16 is two-dimensional array circuit of one M * N, when design, couples transistor Q by resistance R and forms a unit, all corresponding with the spray orifice setting in each unit.When certain transistor Q conducting, the resistance R that couples with it just has electric current to flow through, and to produce heat to the heating of the ink in the inkjet ink chamber 21, makes self-corresponding spray orifice 18 ejections of bubble.In other words, resistance R herein is promptly as heater 19, in order to ink is heated.Importantly, spray orifice during printing is selected, and is according to choosing signal 14 and decide, is to simplify number of signals, chooses signal 14 and can utilize the column selection number of winning the confidence to choose signal with row to form jointly, and select out the spray orifice that institute's desire heats according to this.Among the figure, label X
1, X
2, X
3..., X
MFor choosing the column selection number of the winning the confidence X in the signal 14
a, a=1,2 ..., M, and label Y
1, Y
2, Y
3..., Y
NThen choose signal Y for the row of choosing in the signal 14
b, b=1,2 ..., N hereinafter continues to use this kind label mode with continuing, and is not elsewhere specified.For instance, as the column selection number of winning the confidence X
1Choose signal Y with row
1During feed-in nozzle array 16, can make transistor Q
11Conducting, current flowing resistance R
11Make the self-corresponding spray orifice ejection of ink; The rest may be inferred, as the column selection number of winning the confidence X
MChoose signal Y with row
NDuring feed-in nozzle array 16, can make transistor Q
MNConducting, current flowing resistance R
MNMake the self-corresponding spray orifice ejection of ink.Thus, choose signal according to the column selection number of choosing in the signal 14 of winning the confidence with row, the activation spray orifice corresponding with signal is with printed information exactly.
With reference to Fig. 3, it illustrates spray orifice 18 places of Fig. 1 b, before and after the ink ejection, and the variation relation figure of spray orifice temperature and time.Under normal circumstances, heating ink can elevate the temperature, and ink can be with heat dissipation after spray orifice ejection, so the temperature of spray orifice reduces again again, the variations in temperature of normal spray orifice can approximate diagram in shown in the solid line.Otherwise if undesired situation such as spray orifice obstruction takes place, ink can't spray from spray orifice, can't be limited with the temperature range of decrease of spray orifice with heat energy dissipation also naturally, and the variations in temperature of unusual spray orifice is understood in the approximate diagram shown in the dotted line.
As shown in Figure 1, in traditional ink spray module 15, the thermal resistance that is to use a circle segment spray orifice is as temperature measuring equipment 17, and obtains the temperature of spray orifice by the change in resistance of this thermal resistance.Measured in this way temperature is the temperature-averaging value of some or all spray orifices, can't obtain single spray orifice variation of temperature.Therefore, even a certain or some spray orifice takes place to make unusually ink temperature to raise, this kind structure still can't be found out the problem crux exactly, and the effect of temperature-compensating is extremely limited.
Summary of the invention
Thus, purpose of the present invention is exactly a kind of driver of ink-jet head with temp sensing function to be provided, can to measure the variations in temperature of each spray orifice respectively, and learns the spray orifice state.
Another object of the present invention is exactly that a kind of driver of ink-jet head with temp sensing function is being provided, and can change the temperature of reading spray orifice under the former design arbitrarily not significantly or spray orifice be heated.
According to purpose of the present invention, a kind of head device with temp sensing function that comprises an ink discharge device is provided, described ink discharge device with cause warm signal and and choose signal and couple, the described signal of choosing comprises that a column selection number of winning the confidence and a row of being used to choose described ink discharge device choose signal, and described ink discharge device comprises: a spray orifice; One heating module, described heating module are used for described ink discharge device is selectively heated, so that droplets of ink sprays from described spray orifice; One warming valve is coupled to described row and chooses signal, one and cause warm signal and described heater, is used for selectively described row being chosen signal and causes that warm signal is transferred to described heating module so that the heating of described heater; An and temperature measurement module, be used for producing selectively a temperature measurement signal, described temperature measurement signal is indicated the variations in temperature of described spray orifice, described temperature measurement module comprises: a thermal detector, be provided with near described spray orifice, be used to measure temperature, and produce a detected temperature signal, the temperature of the described printing ink of the very close described spray orifice of described detected temperature signal indication near the described printing ink of described spray orifice; And a thermometry lock, described thermometry lock couples described thermal detector, the described signal of choosing, and is used for selectivity and exports described detected temperature signal; Described thermometry lock is made of a first transistor and a transistor seconds, and described the first transistor and described row are chosen signal and coupled, and described transistor seconds couples the described column selection number of winning the confidence; Wherein, to cause effective, the described selection signal of warm signal effective described, and indicate under the situation that described ink discharge device selects, described warming valve is chosen described row signal and is caused warm signal and is transferred to described heating module, so that described heater heats, when describedly cause warm invalidating signal, described selection signal is effective, and indication selects under the situation of described ink discharge device, described thermometry lock is exported described detected temperature signal.
The invention provides a kind of head device with temp sensing function that comprises an ink discharge device, described ink discharge device is chosen signal and is coupled with causing warm signal and, and the described signal of choosing is used to choose described ink discharge device, and described ink discharge device comprises: a spray orifice; One heating module, described heating module are used for described ink discharge device is carried out the selectivity heating, so that spray ink droplet from described spray orifice; One warming valve, described warming valve couple described warm signal, described signal and the described heater chosen of causing, and are used to make described heater optionally to heat; One temperature measurement module, be used for selectivity and produce a temperature measurement signal, described temperature measurement signal is indicated the variations in temperature of described spray orifice, described temperature measurement module comprises: a thermal detector, be provided with near described spray orifice, be used to measure temperature, and produce a detected temperature signal, the temperature of the described printing ink of the very close described spray orifice of described detected temperature signal indication near the described printing ink of described spray orifice; And a thermometry lock, described thermometry lock couples described thermal detector, the described signal of choosing is used for the described detected temperature signal of selective output; Described thermometry lock is made of a first transistor and a transistor seconds, and described the first transistor and described selection signal couple, and described transistor seconds couples described column selection number of winning the confidence and described selection signal; Wherein, to cause effective, the described selection signal of warm signal effective described, and indicate under the situation that described ink discharge device selects, described warming valve makes described heating module effective, so that described heater heats, invalid, the described selection signal of described temperature measurement signal effectively and indication select under the situation of described ink discharge device, described thermometry lock is exported described detected temperature signal.
The invention provides a kind of head device that comprises an ink discharge device with temp sensing function, described ink discharge device with cause warm signal and and choose signal and couple, the described signal of choosing comprises that a column selection number of winning the confidence and a row of being used to choose described ink discharge device choose signal, and described ink discharge device comprises: a spray orifice; One heating module, described heating module are used for described ink discharge device is selectively heated so that droplets of ink sprays from described spray orifice; An and temperature measurement module, be used for selectivity and produce a temperature measurement signal, described temperature measurement signal is indicated the variations in temperature of described spray orifice, described temperature measurement module comprises: a thermal detector, be provided with near described spray orifice, be used to measure near the temperature of the described printing ink of described spray orifice and produce a detected temperature signal, described detected temperature signal indication is very near the temperature of the described printing ink of described spray orifice; And a thermometry lock, described thermometry lock couples described thermal detector, the described signal of choosing, and is used for selectivity and exports described detected temperature signal; Described thermometry lock comprises: a first transistor and a transistor seconds, and described the first transistor and the described column selection number of winning the confidence couple, and described transistor seconds couples described the first transistor and described row is chosen signal; Wherein, to cause effective, the described selection signal of warm signal effective described, and indication is selected under the situation of described ink discharge device, it is described that to cause warm signal effective, so that from described spray orifice ejection ink droplet, described cause warm invalidating signal, described selection signal effectively and indication select under the situation of described ink discharge device, described temperature measurement module is exported described detected temperature signal, described detected temperature signal indication is very near the temperature of the described printing ink of described spray orifice.
The invention provides a kind of method that is used at the head device thermometric that comprises a plurality of ink discharge devices: this method can avoid driving mistakenly described ink gun when carrying out temperature survey, wherein each ink gun comprises: a spray orifice; One heating module, and a temperature measurement module; Described heating module comprises a heater and a warming valve; Described temperature measurement module comprises a thermal detector and a thermometry lock; Described method comprises the following steps: that selectivity applies a plurality of described ink gun effective choice signals that make; Measure temperature and when not needing ink-jet at needs, the described heating module by applying the ink gun that makes described selection is invalid causes warm signal, makes that the described heating module of ink gun of described selection is invalid, so that stop from described spray orifice ejection ink droplet; The corresponding described temperature measurement module of the ink gun by described selection is exported one at least and will be very indicated detected temperature signal to the described spray orifice of a corresponding selecteed ink gun near the temperature of described printing ink; When the needs ink-jet, by on the heating module of the ink gun of described selection, applying the effectively described warm signal that causes, make that the described heating module of ink gun of described selection is effective, so that from the spray orifice ejection ink droplet of the ink gun of described selection; Wherein, in making the invalid step of described heating module, each selects signal to comprise that a column selection number of winning the confidence and a row choose signal, have a first transistor and a transistor seconds that is coupled to described the first transistor by use, described warming valve makes each heating module of ink gun of described selection invalid, and with described invalid causing on the described transistor seconds that warm signal is applied to described warming valve, so that corresponding described heater is invalid, thus, when carrying out measurement, avoid driving mistakenly described ink gun.
The invention provides a kind of in comprising the head device of a plurality of ink discharge devices the method for thermometric: this method can avoid driving mistakenly described ink gun when carrying out temperature survey, wherein each ink gun comprises: a spray orifice; One heating module, and a temperature measurement module; Described heating module comprises a heater and a warming valve; Described temperature measurement module comprises a thermal detector and a thermometry lock; Described method comprises the following steps: that selectivity applies a plurality of described ink gun effective choice signals that make; Measure temperature and when not needing ink-jet at needs, the described heating module by applying the ink gun that makes described selection is invalid causes warm signal, makes the described heating module of ink gun of described selection invalid, so that stop to spray ink droplet from described spray orifice; The described temperature measurement module of the ink gun by described selection is exported one at least and will be very indicated detected temperature signal to the described spray orifice of the ink gun of a selection near the temperature of described printing ink; When the needs ink-jet, by will effectively describedly causing on the heating module of ink gun that warm signal is applied to described selection, make the described heating module of ink gun of described selection effective, so that from the spray orifice ejection ink droplet of described selecteed ink gun; Wherein, in making the invalid step of described heating module, each selects signal to have a column selection number of winning the confidence and a row is chosen signal, by having a first transistor and a described thermal detector that is coupled to the transistor seconds of described the first transistor, described at least one temperature detection signal of the described ink temperature of the described spray orifice of the ink gun of the very close described selection of output expression; Described column selection number of winning the confidence and described row are chosen signal and are applied to respectively on described the first transistor and the described transistor seconds.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Fig. 1 a illustrates traditional ink-jet printer control calcspar.
It is the cross-section structure of the spray orifice of nozzle array among Fig. 1 a that Fig. 1 b illustrates.
It is nozzle array circuit diagram among Fig. 1 a that Fig. 2 illustrates.
It is the spray orifice of Fig. 1 b that Fig. 3 illustrates, before and after the ink ejection, and the variation relation figure of spray orifice temperature and time.
A kind of spray orifice cross-sectional view that provides according to a preferred embodiment of the present invention is provided Fig. 4.
Fig. 5 illustrates the ink-jet printer control calcspar that present embodiment provides.
It is the control circuit figure of nozzle array among Fig. 5 that Fig. 6 illustrates.
It is the calcspar that has the driver of ink-jet head of temp sensing function among Fig. 6 that Fig. 7 illustrates.
It is the circuit diagram of temperature measurement module among Fig. 6 that Fig. 8 a illustrates.
It is another circuit diagram of temperature measurement module among Fig. 6 that Fig. 8 b illustrates.
It is the circuit diagram of heating module among Fig. 6 that Fig. 9 a illustrates.
It is another circuit diagram of heating module among Fig. 6 that Fig. 9 b illustrates.
Figure 10 illustrates the control circuit figure of orthoscopic spray orifice.
It is the calcspar that has the driver of ink-jet head of temp sensing function among Figure 10 that Figure 11 illustrates.
It is the circuit diagram of temperature measurement module among Figure 11 that Figure 12 a illustrates.
It is another circuit diagram of temperature measurement module among Figure 11 that Figure 12 b illustrates.
It is the circuit diagram of heating module among Figure 11 that Figure 13 illustrates.
The specific embodiment
With reference to Fig. 4, a kind of jet orifice structure schematic diagram that provides according to a preferred embodiment of the present invention is provided for it.Spray orifice 18 places are provided with heater 450 and thermal detector 410.The function of heater 450 is heating ink to produce bubble, and for instance, heater 450 can be that resistance or other can reach the device of this similar function.Thermal detector 410 is then in order to detect the temperature at spray orifice 18 places, and for instance, thermal detector 410 can be that thermistor or other can reach the device of this similar function.Because thermal detector 410 can produce corresponding temperature measurement signal along with temperature change, therefore only need temperature measurement signal is detected, can learn the variations in temperature at spray orifice 18 places.This kind structure is located at each spray orifice, just can accurately learns the variations in temperature of each spray orifice.
With reference to Fig. 5, it illustrates the ink-jet printer control calcspar that present embodiment provides.Ink-jet printer 500 comprises actuating module 510 and ink spray module 550, and wherein, actuating module 510 comprises control device 520 and drive unit 530, in order to will choose signal 14 and to cause warm signal H feed-in nozzle array 560, to select corresponding spray orifice action.In addition, nozzle array 560 includes heating module and temperature measurement module (not illustrating), in order to detect the spray orifice temperature or spray orifice is heated.In the time of need reading the spray orifice temperature, can will choose in the signal 14 feed-in nozzle arrays 560 by drive unit 530, and according to the column selection number of the winning the confidence X that chooses in the signal 14
aAnd row is chosen signal Y
b, after selecting to desire to read the spray orifice 18 of temperature, temperature measurement signal 580 is sent; At different demands, can select only to read the Temperature Datum of single spray orifice, or once read a plurality ofly, even indivedual Temperature Datums of all spray orifices are all followed one's bent.
It should be noted that when the needs printed information, except that needing to choose signal 14 feed-in nozzle arrays 560, need in addition to cause warm signal H feed-in, can be according to choosing spray orifice 18 heating of signal 14 with correspondence, with print job line by line.In other words, causing warm signal H, is in order to separate heating ink and to read temperature two difference in functionalitys, if cause not feed-in of warm signal H, then only to read the spray orifice temperature according to choosing signal 14; The elected number of winning the confidence 14 is when causing the equal feed-in of warm signal H, promptly according to choosing signal 14 printed information.So, the just unlikely heating module that drives when reading temperature causes the situation of misprint to take place.The structure of nozzle array 560 will be illustrated in Fig. 6.After temperature measurement signal 580 detects, can be with its feed-in A/D converter 570, and by analog/digital conversion, the Temperature Datum of spray orifice 18 is fed back to control device 520, in order to the execution of temperature control work.
It should be noted that choosing signal 14 can be divided into two kinds of kenels, one utilizes the column selection number of winning the confidence to choose signal with row and forms, and can reduce number of signals, makes circuit reduction, this be at present the general design of employing; Its two, each unit all utilizes and independently chooses signal and controlled in the nozzle array 560, is called the orthoscopic jet orifice structure, this kind design can increase number of signals, makes the circuit complexity, less at present employing.But structure of the present invention can be applicable to two different control modes simultaneously, so hereinafter will technology contents of the present invention be described in detail in detail respectively with two examples.
With reference to Fig. 6, it illustrates is the control circuit figure of nozzle array 560 among Fig. 5.Nozzle array 560 is two-dimensional array circuit of one M * N, is made of M * N the driver of ink-jet head 600 with temp sensing function.Wherein, each driver of ink-jet head 600 with temp sensing function all with the corresponding one to one setting of spray orifice, and be coupled to the relative column selection number of winning the confidence X
aChoose signal Y with row
bIn addition, each driver of ink-jet head 600 with temp sensing function also is coupled to and causes warm signal H, and determines printing opportunity according to this.For accompanying drawing is simplified, do not draw the details that signal couples herein in detail, and detailed signal coupling mode, will be in hereinafter going on to say.
With reference to Fig. 7, it illustrates is the calcspar that has the driver of ink-jet head 600 of temp sensing function among Fig. 6.Driver of ink-jet head 600 with temp sensing function includes temperature measurement module 610 and heating module 650, the two all with the column selection number of winning the confidence X
aAnd row is chosen signal Y
bCouple, be coupled to and cause warm signal H, drive heating module 650 to avoid the reading temperature mistiming but have heating module 650 only.At first, with the operation mechanism of explanation temperature measurement module 610, with reference to Fig. 8 a.It is the circuit diagram of temperature measurement module 610 among Fig. 6 that Fig. 8 a illustrates, comprise temperature measuring equipment 615 and thermometry lock 619, wherein, temperature measuring equipment 615 is that spray orifice 18 temperature are also corresponding to produce a temperature measurement signal 580 in order to detect, and thermometry lock 619 is in order to according to choosing signal 14 temperature measurement signal 580 is detected.Temperature measuring equipment 615 is by deciding voltage source V
CCBias resistance R and resistance R
TConstitute.It should be noted that resistance R is to decide resistance, resistance is fixed; And resistance R
TBe temperature resistance, resistance becomes with temperature, as thermistor (thermistor) etc.In practical application, can be with thermistor R
T Place spray orifice 18 places to use as thermal detector 410, when spray orifice 18 temperature raise, thermistor R
TResistance reduce, so after the dividing potential drop, voltage V
TAlso lower; Otherwise, when spray orifice 18 temperature reduce, thermistor R
TResistance increase, so after the dividing potential drop, voltage V
TAlso higher, thus, can be with voltage V
TAs temperature measurement signal 580, wait machining function thus, be that temperature measurement signal 580 (is voltage V
T) be corresponding the generation according to the spray orifice temperature.In addition, can be with transistor Q
1With transistor Q
2Couple, as thermometry lock 619, in order to temperature measurement signal 580 is detected.In practical application, can be with transistor Q
1With the column selection number of winning the confidence X
aCouple, with transistor Q
2With the column selection number of winning the confidence Y
bCouple, by in the accompanying drawing as can be known, have only when the equal feed-in of two signals, temperature measurement signal 580 can be detected, therefore, when needs read Temperature Datum, only need the column selection number of winning the confidence X
aAnd row is chosen signal Y
bFeed-in thermometry lock 619 makes its conducting, temperature measurement signal 580 can be detected, and learns the spray orifice temperature according to this.
With reference to Fig. 8 b, it illustrates is another circuit diagram of temperature measurement module 610 among Fig. 6, and wherein, temperature measuring equipment 615 is to utilize thermocouple (TC, thermocouple) device is achieved.In practical application, the thermocouple device can be placed spray orifice 18 places, to use as thermal detector 410, spray orifice 18 temperature are high more, the voltage V that the thermocouple device is produced
TAlso high more; Otherwise, if spray orifice 18 temperature are low more, the voltage V that the thermocouple device is produced
TAlso low more.Thus, can be with voltage V
TAs temperature measurement signal 580, plant machining function by this, be that temperature measurement signal 580 (is voltage V
T) be corresponding the generation according to the spray orifice temperature.The structure of thermometry lock 619 is identical with Fig. 8 a with function among Fig. 8 b, just repeats no more in this.
Then, with reference to Fig. 9 a, it illustrates is the circuit diagram of heating module 650 among Fig. 6, includes warming valve 659 and heater 450.In practical application, can utilize resistance R
HAs heater 450, be located at spray orifice 18 places, in order to ink heating, and be coupled to the column selection number of winning the confidence X
aOn the other hand, can be with transistor Q
3With transistor Q
4Couple,, and be coupled to heater 450, on the heating opportunity in order to control heater 450, illustrate among its coupling mode such as the figure as warming valve 659.In practical application, can be with transistor Q
3Be coupled to row and choose signal Y
bAnd cause warm signal H, and utilize transistor Q
4Couple with heater 450.By among the figure as can be known, if only the column selection number of winning the confidence X arranged
aAnd row is chosen signal Y
bTwo signal feed-ins still can't activation heater 450; Have only as the column selection number of winning the confidence X
a, row chooses signal Y
bAnd cause the equal feed-in heating module 650 of warm signal H three, can make heater 450 heating.Therefore, be this kind heating module 650, be according to causing warm signal H and the column selection number of winning the confidence X
aAnd row is chosen signal Y
bMake heater 450 heating.Certainly, this kind heating module 650 also has it to plant embodiment, and another kind of heating module 650 circuit will cooperate Fig. 9 b to be illustrated.
Then, with reference to Fig. 9 b, it illustrates is another circuit diagram of heating module 650 among Fig. 6, includes warming valve 659 and heater 450.Different with Fig. 9 a is that warming valve 659 is to utilize transistor Q
5With transistor Q
6Couple and realized, in practical application, can be with transistor Q
5Grid be coupled to row and choose signal Y
b, and with transistor Q
6Grid be coupled to and cause warm signal H.By among the figure as can be known, this kind structure also can reach above-mentioned functions, and does not break away from spirit of the present invention.Heating module 650 circuit that provided in the example one are provided, its spirit is: have only as the column selection number of winning the confidence X
a, row chooses signal Y
bAnd when causing the equal feed-in of warm signal H three heating module 650, can make heater 450 heating.Right this three's feed-in method should not exceeded scheming, and those skilled in the art if the feed side of three signals substitutes mutually, still can bring into play above-mentioned functions, and not break away from spirit of the present invention as can be known.
Figure 10 illustrates the control circuit figure of orthoscopic spray orifice, and each has the heater 100 of temp sensing function by the column selection number of winning the confidence X
aAnd cause warm signal H and controlled.The column selection number of winning the confidence X
aAfter the feed-in, promptly can read the spray orifice temperature corresponding, as the column selection number of winning the confidence X with this signal
aWith cause warm signal H in the lump during feed-in, can select and the column selection number of winning the confidence X
aCorresponding spray orifice sprays ink.Its mechanism is similar to example one, so do not give unnecessary details.
With reference to Figure 11, it illustrates is the calcspar that has the driver of ink-jet head 100 of temp sensing function among Figure 10.Driver of ink-jet head 100 with temp sensing function includes temperature measurement module 110 and heating module 150, the two all with the column selection number of winning the confidence X
aCouple, be coupled to and cause warm signal H, drive heating module 150 to avoid the reading temperature mistiming but have heating module 150 only.With reference to Figure 12 a, it illustrates is the circuit diagram of temperature measurement module 110 among Figure 11.The operation mechanism of temperature measuring equipment 615 is identical with example one, does not repeat them here.Temperature measurement module 110 and temperature measurement module 610 differences are the column selection number of the winning the confidence X in this kind circuit
aThermometry lock 119 has only one, so only need utilize a transistor Q
1Can realize.In practical application, can be with transistor Q
1Couple with temperature measurement module 615, as the column selection number of winning the confidence X
aFeed-in transistor Q
1After making its conducting, can (be voltage V with temperature measurement signal 580
T) detect, and learn the spray orifice temperature according to this.
With reference to Figure 12 b, it illustrates another circuit diagram of temperature measurement module 110 among Figure 11.Temperature measuring equipment 615 is to utilize thermocouple TC to be achieved, and its operation mechanism and example together do not repeat them here.Same, can be with transistor Q
1Couple as thermometry lock 119 and with temperature measurement module 615, as the column selection number of winning the confidence X
aAfter the feed-in, can (be voltage V with temperature measurement signal 580
T) detect, and learn the spray orifice temperature according to this.
Then, with reference to Figure 13, it illustrates is the circuit diagram of heating module 150 among Figure 11, includes warming valve 159 and heater 450.In practical application, can utilize resistance R
HAs heater 450, be located at spray orifice 18 places, and be coupled to the column selection number of winning the confidence X
a, on the other hand, because the column selection number of winning the confidence X
aBe an independent signal, so only need utilize a transistor Q to get final product as warming valve 159.As the column selection number of winning the confidence X
aAfter causing the equal feed-in heating module 150 of warm signal H, can make heater 450 heating.
It should be noted that, in the preferred embodiment of the present invention, be to utilize mos field effect transistor (MOSFET) to form thermometry lock and warming valve, the unique selection that constitutes of mos field effect transistor and inverter circuit only, those skilled in the art also can utilize bipolar junction transistor (BJT) or junction field effect transistor elements such as (JFET) to form this kind circuit, and reach similar function with the present invention, do not break away from spirit of the present invention.In addition, employed signal feed-in mode only is an example of the present invention among the embodiment, be not in order to limiting applicable elements of the present invention, any those skilled in the art all can change the feed side of signal and reach the similar function with the present invention, does not only still break away from spirit of the present invention.Appropriate products of the present invention, the ink-jet printer of mentioning in literary composition, the ink gun on the office work machines such as facsimile machine, printer is all applicable, to promote temperature control effect, improves print quality.
The disclosed driver of ink-jet head with temp sensing function of the above embodiment of the present invention, its major advantage are, only increase by a control signal and promptly can read all spray orifice temperature, and temperature control is accurate, the lifting print quality is had greatly benefit.
In sum; though the present invention discloses as above with a preferred embodiment; right its is not in order to limit the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; can be used for a variety of modifications and variations, so protection scope of the present invention should be with being as the criterion that the claim scope is defined.
Claims (26)
1. head device that comprises an ink discharge device with temp sensing function, described ink discharge device with cause warm signal and and choose signal and couple, the described signal of choosing comprises that a column selection number of winning the confidence and a row of being used to choose described ink discharge device choose signal, and described ink discharge device comprises:
One spray orifice;
One heating module, described heating module are used for described ink discharge device is selectively heated, so that droplets of ink sprays from described spray orifice; One warming valve is coupled to described row and chooses signal, one and cause warm signal and described heater, is used for selectively described row being chosen signal and causes that warm signal is transferred to described heating module so that the heating of described heater; And
One temperature measurement module, be used for producing selectively a temperature measurement signal, described temperature measurement signal is indicated the variations in temperature of described spray orifice, described temperature measurement module comprises: a thermal detector, be provided with near described spray orifice, be used to measure the temperature near the described printing ink of described spray orifice, Bing produces a detected temperature signal, the temperature of the described printing ink of the very close described spray orifice of described detected temperature signal indication; And a thermometry lock, described thermometry lock couples described thermal detector, the described signal of choosing, and is used for selectivity and exports described detected temperature signal; Described thermometry lock is made of a first transistor and a transistor seconds, and described the first transistor and described row are chosen signal and describedly caused warm signal and couple, and described transistor seconds couples the described column selection number of winning the confidence;
Wherein, to cause effective, the described selection signal of warm signal effective described, Bing and indicating under the situation that described ink discharge device selects, described warming valve is chosen described row signal and is caused warm signal and is transferred to described heating module, so that described heater heats;
When describedly cause warm invalidating signal, described selection signal is effective, and indication selects under the situation of described ink discharge device, described thermometry lock is exported described detected temperature signal.
2. the head device with temp sensing function as claimed in claim 1, wherein, described thermal detector is a thermistor.
3. the head device with temp sensing function as claimed in claim 1, wherein, described thermal detector is a thermocouple.
4. the head device with temp sensing function as claimed in claim 1, wherein, described temperature measurement signal is a voltage signal.
5. the head device with temp sensing function as claimed in claim 1, wherein, described the first transistor and described transistor seconds are mos field effect transistor.
6. the head device with temp sensing function as claimed in claim 1, wherein, described the first transistor and described transistor seconds are field-effect transistors.
7. the head device with temp sensing function as claimed in claim 1, wherein, described the first transistor and described transistor seconds are bipolar transistors.
8. the head device with temp sensing function as claimed in claim 1, wherein, described heater is a resistance.
9. head device that comprises an ink discharge device with temp sensing function, described ink discharge device is chosen signal and is coupled with causing warm signal and, and the described signal of choosing is used to choose described ink discharge device, and described ink discharge device comprises:
One spray orifice;
One heating module, described heating module are used for described ink discharge device is carried out the selectivity heating, so that spray ink droplet from described spray orifice; One warming valve, described warming valve couple described warm signal, described signal and the described heater chosen of causing, and are used to make described heater optionally to heat;
One temperature measurement module, be used for selectivity and produce a temperature measurement signal, described temperature measurement signal is indicated the variations in temperature of described spray orifice, described temperature measurement module comprises: a thermal detector, be provided with near described spray orifice, be used to measure the temperature near the described printing ink of described spray orifice, Bing produces a detected temperature signal, the temperature of the described printing ink of the very close described spray orifice of described detected temperature signal indication; And a thermometry lock, described thermometry lock couples described thermal detector, the described signal of choosing is used for the described detected temperature signal of selective output; Described thermometry lock is made of a first transistor and a transistor seconds, and described the first transistor and described selection signal couple, and described transistor seconds couples described column selection number of winning the confidence and described selection signal;
Wherein, to cause effective, the described selection signal of warm signal effective described, Bing and indicating under the situation that described ink discharge device selects, and described warming valve makes described heating module effective, so that described heater heats;
Select under the situation of described ink discharge device at described temperature measurement signal effective Bing of invalid, described selection signal and indication, described thermometry lock is exported described detected temperature signal.
10. the head device with temp sensing function as claimed in claim 9, wherein, described thermal detector is a thermistor.
11. the head device with temp sensing function as claimed in claim 9, wherein, described thermal detector is a thermocouple.
12. the head device with temp sensing function as claimed in claim 9, wherein, described temperature measurement signal is a voltage signal.
13. the head device with temp sensing function as claimed in claim 9, wherein, described thermometry lock is a transistor.
14. the head device with temp sensing function as claimed in claim 13, wherein, described transistor is a mos field effect transistor.
15. the head device with temp sensing function as claimed in claim 13, wherein, described transistor is a field-effect transistor.
16. the head device with temp sensing function as claimed in claim 9, wherein, described transistor is a bipolar transistor.
17. the head device with temp sensing function as claimed in claim 9, wherein, described heater is a resistance.
18. the head device with temp sensing function as claimed in claim 9, wherein, described warming valve is a transistor.
19. the head device with temp sensing function as claimed in claim 18, wherein, described transistor is a mos field effect transistor.
20. the head device with temp sensing function as claimed in claim 18, wherein, described transistor is a field-effect transistor.
21. the head device with temp sensing function as claimed in claim 18, wherein, described transistor is a bipolar transistor.
22. head device that comprises an ink discharge device with temp sensing function, described ink discharge device with cause warm signal and and choose signal and couple, the described signal of choosing comprises that a column selection number of winning the confidence and a row of being used to choose described ink discharge device choose signal, and described ink discharge device comprises:
One spray orifice;
One heating module, described heating module are used for described ink discharge device is selectively heated so that droplets of ink sprays from described spray orifice; And
One temperature measurement module, be used for selectivity and produce a temperature measurement signal, described temperature measurement signal is indicated the variations in temperature of described spray orifice, described temperature measurement module comprises: a thermal detector, be provided with near described spray orifice, the temperature Bing that is used to measure near the described printing ink of described spray orifice produces a detected temperature signal, and described detected temperature signal indication is very near the temperature of the described printing ink of described spray orifice; And a thermometry lock, described thermometry lock couples described thermal detector, the described signal of choosing, and is used for selectivity and exports described detected temperature signal; Described thermometry lock comprises: a first transistor and a transistor seconds, and described the first transistor and the described column selection number of winning the confidence couple, and described transistor seconds couples described the first transistor and described row is chosen signal;
Wherein, to cause effective, the described selection signal of warm signal effective described, and Bing and indication are selected under the situation of described ink discharge device, and described to cause warm signal effective, so that from described spray orifice ejection ink droplet;
Cause warm invalidating signal, the effective Bing of described selection signal and indication is selected under the situation of described ink discharge device described, described temperature measurement module is exported described detected temperature signal, the temperature of the described printing ink of the very close described spray orifice of described detected temperature signal indication.
23. head device as claimed in claim 22, wherein said heating module also comprises:
One heater is provided with near described spray orifice, is used for heating the printing ink of described ink gun, so that from described spray orifice ejection printing ink; And
One warming valve couples and describedly chooses signal and describedly cause warm signal, is used to make heater effective, so that cause warm signal when effective described, and described when choosing the effective Bing indication of signal and selecting described ink gun, described spray orifice ejection ink droplet.
24. head device as claimed in claim 22, wherein said heating module also comprises:
One heater is provided with near described spray orifice, and couples the described column selection number of winning the confidence, and is used for heating the printing ink of described ink gun, so that from described spray orifice ejection printing ink; And
One warming valve, coupling described row chooses signal and describedly causes warm signal, be used to make heater effective, so that cause warm signal when effective described, and cause effective, the described column selection number of winning the confidence of warm signal and row to choose signal effective described, and when described ink gun is selected in indication, described spray orifice ejection ink droplet.
25. method that is used at the head device thermometric that comprises a plurality of ink discharge devices: this method can avoid driving mistakenly described ink gun when carrying out temperature survey, wherein each ink gun comprises: a spray orifice; One heating module, and a temperature measurement module; Described heating module comprises a heater and a warming valve; Described temperature measurement module comprises a thermal detector and a thermometry lock; Described method comprises the following steps:
Selectivity applies a plurality of described ink gun effective choice signals that make;
Measure temperature and when not needing ink-jet at needs, the described heating module by applying the ink gun that makes described selection is invalid causes warm signal, makes that the described heating module of ink gun of described selection is invalid, so that stop from described spray orifice ejection ink droplet; The corresponding described temperature measurement module of the ink gun by described selection is exported one at least and will be very indicated detected temperature signal to the described spray orifice of a corresponding selecteed ink gun near the temperature of described printing ink;
When the needs ink-jet, by on the heating module of the ink gun of described selection, applying the effectively described warm signal that causes, make that the described heating module of ink gun of described selection is effective, so that from the spray orifice ejection ink droplet of the ink gun of described selection;
Wherein, in making the invalid step of described heating module, each selects signal to comprise that a column selection number of winning the confidence and a row choose signal, have a first transistor and a transistor seconds that is coupled to described the first transistor by use, described warming valve makes each heating module of ink gun of described selection invalid, and with described invalid causing on the described transistor seconds that warm signal is applied to described warming valve, so that corresponding described heater is invalid, thus, when carrying out measurement, avoid driving mistakenly described ink gun.
26. method that is used at the head device thermometric that comprises a plurality of ink discharge devices: this method can avoid driving mistakenly described ink gun when carrying out temperature survey, wherein each ink gun comprises: a spray orifice; One heating module, and a temperature measurement module; Described heating module comprises a heater and a warming valve; Described temperature measurement module comprises a thermal detector and a thermometry lock; Described method comprises the following steps:
Selectivity applies a plurality of described ink gun effective choice signals that make;
Measure temperature and when not needing ink-jet at needs, the described heating module by applying the ink gun that makes described selection is invalid causes warm signal, makes the described heating module of ink gun of described selection invalid, so that stop to spray ink droplet from described spray orifice; The described temperature measurement module of the ink gun by described selection is exported one at least and will be very indicated detected temperature signal to the described spray orifice of the ink gun of a selection near the temperature of described printing ink;
When the needs ink-jet, by will effectively describedly causing on the heating module of ink gun that warm signal is applied to described selection, make the described heating module of ink gun of described selection effective, so that from the spray orifice ejection ink droplet of described selecteed ink gun;
Wherein, in making the invalid step of described heating module, each selects signal to have a column selection number of winning the confidence and a row is chosen signal, by having a first transistor and a described thermal detector that is coupled to the transistor seconds of described the first transistor, described at least one temperature detection signal of the described ink temperature of the described spray orifice of the ink gun of the very close described selection of output expression; Described column selection number of winning the confidence and described row are chosen signal and are applied to respectively on described the first transistor and the described transistor seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00128689 CN1255280C (en) | 2000-09-20 | 2000-09-20 | Driver of ink-jet head with temp sensing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00128689 CN1255280C (en) | 2000-09-20 | 2000-09-20 | Driver of ink-jet head with temp sensing function |
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| Publication Number | Publication Date |
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| CN1343564A CN1343564A (en) | 2002-04-10 |
| CN1255280C true CN1255280C (en) | 2006-05-10 |
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| CN 00128689 Expired - Fee Related CN1255280C (en) | 2000-09-20 | 2000-09-20 | Driver of ink-jet head with temp sensing function |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005096377A (en) * | 2003-09-26 | 2005-04-14 | Brother Ind Ltd | Printing device and printing method |
| CN1317127C (en) * | 2003-12-29 | 2007-05-23 | 财团法人工业技术研究院 | Circuit and method for evaluating usage rate of ink-jet hole of ink-jet head |
| CN100376398C (en) * | 2004-10-29 | 2008-03-26 | 明基电通股份有限公司 | Method for detecting ideal start point temperature of ink gun of ink jet wafer and ink gun |
| US7802866B2 (en) * | 2006-06-19 | 2010-09-28 | Canon Kabushiki Kaisha | Recording head that detects temperature information corresponding to a plurality of electro-thermal transducers on the recording head and recording apparatus using the recording head |
| CN113059913B (en) * | 2021-03-25 | 2022-11-22 | 苏州印科杰特半导体科技有限公司 | Design structure for preventing ink breaking and damage of thermal bubble type spray head |
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2000
- 2000-09-20 CN CN 00128689 patent/CN1255280C/en not_active Expired - Fee Related
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| CN1343564A (en) | 2002-04-10 |
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