CN106985518B - Liquid discharge apparatus, ink jet printing device and liquid ejection method - Google Patents

Liquid discharge apparatus, ink jet printing device and liquid ejection method Download PDF

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Publication number
CN106985518B
CN106985518B CN201710011385.5A CN201710011385A CN106985518B CN 106985518 B CN106985518 B CN 106985518B CN 201710011385 A CN201710011385 A CN 201710011385A CN 106985518 B CN106985518 B CN 106985518B
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liquid
flow
ejection head
fluid ejection
fluid
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CN106985518A (en
Inventor
户塚绚子
岩永周三
笠井信太郎
中川喜幸
齐藤亚纪子
佐藤智厚
守屋孝胤
石田浩一
山田辰也
石绵友树
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Canon Inc
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Canon Inc
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet

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  • Ink Jet (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)

Abstract

The present invention relates to a kind of liquid discharge apparatus, ink jet printing device and liquid ejection methods.Liquid is securely fed to fluid ejection head via multiple feed paths.Liquid is supplied to the multiple regions of the fluid ejection head via the multiple feed path, and the liquid spray volume per unit time from the fluid ejection head is controlled, so that the fluid flow of each region in the multiple region becomes predetermined amount of flow or is less than predetermined amount of flow.

Description

Liquid discharge apparatus, ink jet printing device and liquid ejection method
Technical field
The present invention relates to the ejections of the liquid discharge apparatus of the liquid for spraying ink etc., ink jet printing device and liquid Method.
Background technique
In the ink jettable fluid ejecting head of the fluid ejection head for being used as ejection liquid ink in recent years, existing following need It asks: inhibiting to obscure printing caused by due to ink supply deficiency, to meet the raising of picture quality and print speed.As fuzzy The reason of image, illustrates the pressure loss into the flow path that ink sprays opening supply ink.On the other hand, there are following trend: ink In coloured material or resin material amount increase, to obtain high picture quality.Additionally, there are following trend: opening with ejection The high-density arrangement of mouth correspondingly reduces the width of black flow path.For these reasons, therefore with the increase of print speed increase The big pressure loss causes serious problems.
Japanese Unexamined Patent Publication 2005-280246 discloses following method: according to print data prediction printing duty ratio, and in response to The printing duty ratio controls black flow, so that all average black flows for spraying opening become predetermined amount of flow.On the other hand, day This special open 2007-69419 discloses following method: the increase with the length of fluid ejection head correspondingly, is supplied by multiple branches To path to multiple ejections of fluid ejection head be open ink supply.
However, being deposited being open in the method for ink supply by multiple branch's feed paths to multiple ejections of fluid ejection head Worrying as follows: being controlled as disclosed in Japanese Unexamined Patent Publication 2005-280246 based on all average black flows for spraying opening In the case where black flow, the part of fluid ejection head may ink supply deficiency.
Summary of the invention
The present invention provides a kind of liquid spray that can steadily supply liquid to fluid ejection head by multiple feed paths Equipment and liquid ejection method out.
In the first aspect of the present invention, a kind of liquid discharge apparatus is provided, is opened from multiple ejections of fluid ejection head Mouthful spray liquid, the liquid discharge apparatus includes: feed path, be configured as with the multiple ejection open communication, and And liquid is supplied to the multiple regions of the fluid ejection head；And controller, it is configured as control and is sprayed from the liquid The liquid spray volume per unit time of head, so that the fluid flow of each region in the multiple region becomes predetermined amount of flow Or it is less than the predetermined amount of flow.
In the second aspect of the present invention, a kind of ink jet printing device is provided comprising according to the first aspect of the invention Liquid discharge apparatus, wherein the fluid ejection head is the liquid ink that can make to be supplied via the feed path from institute It states multiple inkjet print heads for spraying opening ejection and the ink jet printing device includes mobile mechanism, the mobile mechanism The print media for being configured as be applieding to the inkjet print head with the ink sprayed from the inkjet print head relatively moves.
In the third aspect of the present invention, a kind of liquid ejection method is provided, for multiple ejections from fluid ejection head Opening sprays liquid, and the liquid ejection method is the following steps are included: via opposite with the multiple regions of the fluid ejection head The multiple feed paths answered, each region into the multiple region supply liquid, wherein the multiple region and described more A ejection open communication；And control is from the liquid spray volume per unit time of the fluid ejection head, so that the multiple The fluid flow of each region in region becomes predetermined amount of flow or is less than the predetermined amount of flow.
According to the present invention, the multiple regions of fluid ejection head extremely are supplied respectively by multiple feed paths by liquid Fluid flow become predetermined amount of flow or be less than predetermined amount of flow, therefore can inhibit liquid while being locally supplying deficiency to Liquid is stably supplied in fluid ejection head.
By the explanation below with reference to attached drawing to exemplary embodiments, other feature of the invention be will be apparent.
Detailed description of the invention
Figure 1A be illustrate first embodiment according to the present invention the printing device as liquid discharge apparatus it is schematic Perspective view and Figure 1B are the block diagrams of the control system of the printing device of diagrammatic illustration 1A；
Fig. 2A, 2B and 2C are the exemplary perspective views of different structure of the fluid ejection head of diagrammatic illustration 1A respectively；
Fig. 3 is the explanatory diagram of the ink feeding system of the fluid ejection head of diagrammatic illustration 1A；
Fig. 4 A is the perspective view of the type element plate of the fluid ejection head of diagrammatic illustration 1A, and Fig. 4 B is to illustrate fluid ejection head The enlarged drawing and Fig. 4 C of major part are the sectional views intercepted along the line IVC-IVC of Fig. 4 B；
Fig. 5 is the flow chart of the black flow control processing in the printing device of diagrammatic illustration 1A；
Fig. 6 A is the exemplary explanatory diagram of arrangement for illustrating the type element plate of fluid ejection head and Fig. 6 B, 6C and 6D are The explanatory diagram with the black flow path of different printing duty ratios is illustrated respectively；
Fig. 7 A is the exemplary explanatory diagram for illustrating the pressure loss monitor area of fluid ejection head and Fig. 7 B is to illustrate to divide The explanatory diagram of relationship between the monitor area of Zhi Liulu and Fig. 7 A；
Fig. 8 A is the relationship illustrated between another example of the pressure loss monitor area of branch flow passage and fluid ejection head Explanatory diagram and Fig. 8 B be diagrammatic illustration 8A monitor area explanatory diagram；
Fig. 9 A is the relationship illustrated between the another example of the pressure loss monitor area of branch flow passage and fluid ejection head Explanatory diagram and Fig. 9 B be diagrammatic illustration 9A monitor area explanatory diagram；
Figure 10 A is the relationship illustrated between the another example of the pressure loss monitor area of branch flow passage and fluid ejection head Explanatory diagram and Figure 10 B be diagrammatic illustration 10A monitor area explanatory diagram；
Figure 11 A is the schematic isometric of the printing device as liquid discharge apparatus of second embodiment according to the present invention Figure and Figure 11 B are the perspective views of the major part of the fluid ejection head of diagrammatic illustration 11A；
Figure 12 is the explanatory diagram of ink feeding system used in the fluid ejection head of diagrammatic illustration 11A；
Figure 13 A is the perspective view of the type element plate of the fluid ejection head of diagrammatic illustration 11A, and Figure 13 B is beating for diagrammatic illustration 13A The enlarged perspective and Figure 13 C of the major part of printing elements plate are the sections intercepted along the line XIIIC-XIIIC of Figure 13 B Figure；
Figure 14 is the flow chart of the black flow control processing of the printing device of diagrammatic illustration 11A；
Figure 15 is to illustrate the ink supply system of the printing device as liquid discharge apparatus of third embodiment according to the present invention The explanatory diagram of system；
Figure 16 A is the perspective view of the type element plate of the fluid ejection head of diagrammatic illustration 15, and Figure 16 B is beating for diagrammatic illustration 16A The enlarged perspective and Figure 16 C of the major part of printing elements plate are the sectional views intercepted along the line XVIC-XVIC of Figure 16 B；
Figure 17 is the exemplary explanatory diagram of the pressure loss monitor area of the fluid ejection head of diagrammatic illustration 15；
Figure 18 is to illustrate the explanatory diagram of the printing device of fourth embodiment according to the present invention；
Figure 19 is to illustrate the explanatory diagram of the first circulation structure suitable for the circulating path of the printing device of Figure 18；
Figure 20 is to illustrate the explanatory diagram of the second circulation structure suitable for the circulating path of the printing device of Figure 18；
Figure 21 is to illustrate the explanatory diagram of first circulation structure and the black internal circulating load in second circulation structure；
Figure 22 A and 22B are the perspective views of the fluid ejection head of diagrammatic illustration 18 respectively；
Figure 23 is to illustrate the exploded perspective view of fluid ejection head；
Figure 24 be illustrate fluid ejection head in first flow path component, second flow path component and third channel member front With the figure at the back side；
Figure 25 is to illustrate the flow path formed by engagement first flow path component, second flow path component and third channel member Enlarged perspective；
Figure 26 is the sectional view intercepted along the line XXVI-XXVI of Figure 25；
Figure 27 A and 27B are to illustrate the perspective view for spraying module respectively；
Figure 28 A, 28B and 28C are to illustrate the explanatory diagram of type element plate respectively；
Figure 29 is to illustrate the perspective view in the section of type element plate of the line XXIX-XXIX interception along Figure 28 A；
Figure 30 is the amplification vertical view of the adjacent part of two type element plates；
Figure 31 A and 31B are to illustrate the perspective view of the fluid ejection head of fifth embodiment according to the present invention respectively；
Figure 32 is to illustrate the amplification stereogram of fluid ejection head；
Figure 33 is to illustrate the explanatory diagram for the channel member for constituting fluid ejection head；
Figure 34 is the perspective of the liquid connection relationship between the type element plate and channel member illustrated in fluid ejection head Figure；
Figure 35 is the sectional view intercepted along the line XXXV-XXXV of Figure 34；
Figure 36 A and 36B are to illustrate the perspective view of the ejection module of fluid ejection head；
Figure 37 A and 37B are to illustrate the explanatory diagram of type element plate；
Figure 37 C is to illustrate the explanatory diagram of cover plate；
Figure 38 is to illustrate the figure of the 5th embodiment of the printing device that the present invention is applicable in；
Figure 39 is to illustrate the figure of the structure of fluid ejection head of sixth embodiment according to the present invention；
Figure 40 is to illustrate the figure of the structure of fluid ejection head of sixth embodiment according to the present invention.
Specific embodiment
Hereinafter, the embodiment of the present invention will be described in reference to the drawings.
(first embodiment)
The liquid discharge apparatus of first embodiment is that ink gushes out by using ink jettable fluid ejecting head to beat as liquid The application example of the ink jet printing device of watermark image.In addition, spray liquid (ink etc.) fluid ejection head and equipped with The liquid discharge apparatus of fluid ejection head can be applied to printer, duplicator, the facsimile machine with communication system, have printing The word processor of machine and the Industrial Printing equipment combined with various processing units.It is, for example, possible to use fluid ejection heads Biochip, printing electronic circuit or manufacture semiconductor substrate are manufactured with liquid discharge apparatus.Further, since being described below Embodiment be detailed example of the invention, therefore the various technology limitings for these embodiments can be made.However, using Example and embodiment are not limited to the application example, embodiment and other method detaileds of this specification, and can be in essence of the invention It modifies in mind.
(structure of printing device)
Figure 1A is to illustrate the schematic perspective view of the basic structure of ink jet printing device 101 according to the present invention.The example Printing device 101 be the printing device with page width type fluid ejection head, and printing device 101 includes: by arrow A table The supply unit 103 of print media 104 and inkjet print head (the liquid ejection for ink-jet are conveyed on the conveying direction shown Head) 102.The exemplary supply unit 103 conveys print media 104 by using conveyer belt 103A.Fluid ejection head 102 is The row type extended on the direction that the conveying direction with print media 104 intersects (being in the case of this example orthogonal direction) (page width type) fluid ejection head, and arrangement is open for multiple ejections of ink-jet in the width direction of print media 104.It is logical The ink supply for constituting black flow path is crossed from accumulator (not illustrating) to 102 ink supply of fluid ejection head.Print media 104 is being continuously conveyed While be open from the ejection of fluid ejection head 102 to the case where 104 ink-jet of print media based on print data (spray data) Under, image is printed on print media 104.Print media 104 is not limited to single-sheet stationery, and can be elongated reel thin slice.
Figure 1B is to illustrate the block diagram of the topology example of control system of printing device 101.CPU 105 carries out printing device 101 operation control processing or data processing.ROM 106 store processing sequence program, and RAM 107 be used as carry out these Processing working region used.Fluid ejection head 102 includes that multiple spray is open, is multiple with these ejection open communications respectively The ejection energy generating element being respectively configured in black flow path and these black flow paths.Therefore, the multiple sprays for capableing of ink-jet are formd Mouth.These nozzles are used as type element.As energy generating element is sprayed, electrothermal conversioning element or piezoelectric element can be used. Using electrothermal conversioning element, the ink inside black flow path is become by bubble by the heat of electrothermal conversioning element, and Can by using foaming energy from spray be open ink-jet.Proceed as follows ejection of the ink from fluid ejection head 102: CPU 105, based on the image data from inputs such as host apparatus 108, ejection energy generating element are driven by head driver 102A. CPU 105 drives the conveying motor 103C driven to supply unit 103 by motor driver 103B.
(structure of fluid ejection head)
As shown in Fig. 2A, 2B and 2C, fluid ejection head 102 includes type element plate (liquid ejection substrate) 202 and support The support member 201 of type element plate, and type element plate 202 equipped with ejection opening 203, Mo Liulu and sprays energy Producing element.
Multiple type element plates 202 are configured on the fluid ejection head 102 of Fig. 2A with zigzag, and multiple ejections are open 203 configurations are on the direction (being in the case of this example orthogonal direction) intersected with the conveying direction indicated by arrow A.At this In exemplary situation, sprays opening 203 and be configured to form four ejection aperture arrays, and this four ejection aperture arrays can To be configured as spraying different black or identical ink.Multiple type element plates 202 are configured as the fluid ejection head in Fig. 2 B It is in contact with each other at 102.Single type element plate 202 is configured at the fluid ejection head 102 of Fig. 2 C.Fluid ejection head 102 Structure is not limited to the example of Fig. 2A, 2B and 2C, and various structures can be used arbitrarily.
(structure of ink feeding system)
Fig. 3 is to illustrate the schematic diagram of the topology example of the feed system to 102 ink supply of fluid ejection head.
The fluid connection 302b of fluid ejection head 102 is fluidly connected to main memory 301 by common flow path 303. Common flow path 303 and fluid ejection head 102 are connected to fluid connection 302a, and the ink inside main memory 301 is supplied to To fluid ejection head 102.The ink of fluid ejection head 102 is supplied to via the multiple affluent-dividings obtained from 303 branch of common flow path Road 304 and be divided, and be fed into type element plate 202 corresponding with branch flow passage 304.
(description of the structure of type element plate)
Fig. 4 A, 4B and 4C are to illustrate the explanatory diagram of the topology example of type element plate 202 of fluid ejection head 102.
Fig. 4 A is to illustrate the perspective view of the exemplary type element plate 202, and orifice plate 401 is joined on substrate 402.Hole Plate 401 is equipped with multiple ejections opening 203, and these spray opening 203 and formed and spray aperture array 403.Half can be passed through Conductor processing configures the electronic device for spraying energy generating element, electronic circuit, electric wire and temperature sensor etc. in base The front of plate 402.Due to this reason, it is expected that material (such as semiconductor substrate for being formed with flow path will be handled by MEMS Deng) material as substrate 402.Material of any materials as orifice plate 401 can be used.It is, for example, possible to use can pass through Laser treatment, which is formed with, to be sprayed the resin substrate of opening, the inorganic board of ejection opening can be formed with by cutting, can be passed through Photocuring be formed with spray opening and flow path photosensitive resin material and can by MEMS handle be formed with ejection opening and The semiconductor substrate of flow path.
Fig. 4 B is to illustrate from the enlarged perspective and Fig. 4 C of the type element plate 202 in the case where the viewing of orifice plate 401 to be The sectional view intercepted along the line IVC-IVC of Fig. 4 B.With reference to Fig. 4 B and 4C, the structure of type element plate will be described.In substrate 402 Pressure chamber 404 is formed in space between orifice plate 401.It is configured at the position towards ejection opening 203 of substrate 402 From the energy generating element 405 for spraying 203 ink-jets of opening.As energy generating element 405, electrothermal conversioning element can be used (heater) or piezoelectric element.Pressure chamber 404 is fluidly connected to common liquid room 407, so that forming a series of black flow path (fluids Flow path).The common liquid room 407 that aperture array 403 extends with the vertical direction along Fig. 4 B is sprayed to be formed parallel in shared liquid The two sides (left and right side of Fig. 4 B and Fig. 4 C) of body room 407, and by the pressure chambers 404 of common liquid room two sides from ejection Opening 203 sprays the ink inside common liquid room 407.
(pressure loss of ink feeding system)
In general, the pressure loss of ink feeding system is according to ink from 102 ink-jet of fluid ejection head with print image Viscosity increase and ink spray frequency increase and increase.Therefore, it is easy that print fault occurs since ink supply is insufficient.Hereafter In, which will be described.
By the way that the viscous resistance R of feed path is multiplied with ink flow Q, can obtain in the case where spray and be open ink-jet The pressure loss Δ P of generation.Viscous resistance R changes according to the viscosity of ink, and the pressure loss is according to the increase of the viscosity of ink And increase.In addition, extending to the ink supply flow path for spraying opening also due to spraying the increase of the layout density of opening and narrowing, thus The pressure loss increases.In view of the reason, since ink droplet formation operation is interfered in the case where meniscus is recessed, (fog increases And spray volume Vd changes), therefore there are the worries of print fault.It is therefore contemplated that calculating pressure as unit of by monitor area Power can inhibit the influence of local pressure loss in the case where losing.By spray opening quantity and (with per unit time Ink-jet number is corresponding) ink sprays frequency and determines flow Q.
In the present embodiment, as shown in Fig. 6 A to Figure 10 B, printing member corresponding with the branch flow passage of parallel arrangement is calculated The pressure loss of each monitor area of part plate.However, the monitor area that monitor area is not limited to the present embodiment.For example, from master Common feed flow path (wherein recycle stream flows to downstream side from upstream side by the main common feed flow path) is to multiple type elements In the structure of 202 ink supply of plate, the pressure loss of downstream type element plate 202 is greater than the pressure loss of upstream type element plate 202. Utilize the structure, from the ink-jet of both upstream type element plate and downstream type element plate, downstream type element plate 202 ink supply are insufficient.By this method, black flow (liquid flow is controlled in the influence of the pressure loss in view of each type element plate Amount) in the case where, the local ink supply reduced in multiple type element plates is insufficient, and therefore can normal ink supply.In addition, base The duty cycle threshold in monitor area is determined in the calculated black flow that is described below.Furthermore, it is possible in view of from beating Print media conveying direction (the relative movement side relative to fluid ejection head is arbitrarily arranged in the pressure loss that watermark image obtains To).
(the control example of Mo Liuliang)
Fig. 5 is illustrated by the flow chart of the black flow control processing carried out of CPU 105.
CPU 105 reads image data (step S1) from host apparatus 108 is equal, specifies ink traffic monitor region (step S2), and the quantity (step S3) that the ejection in the region is open is calculated.Black traffic monitor region is described below.It can be based on Existing parameter carries out the processing in step S2 and step S3.Opening is sprayed it is therefore not necessary to calculate in each printing Quantity and monitor area.It is then possible to which these values are stored as given value in design.Based in each monitor area from The quantity of ejection opening in the ejection frequency and spray volume of the ink that the monitor area sprays and the monitor area, to calculate Pass through the average flow rate Q (step S4) of the ink of the monitor area.Then, monitor area is identified as pressure loss part, and Pressure loss Δ P (step S5) is calculated according to the viscous resistance R and average flow rate Q of the ink in each monitor area.Then, judge to press Power loses whether Δ P is more than preset value delta TP (step S6).In the case where pressure loss Δ P is less than preset value delta TP, Printing (step S7) is carried out in the case where not controlling black flow.It on the other hand, is more than preset value delta TP in pressure loss Δ P In the case where, control black flow (step S8).That is, the reduction phase reducing ink ejection frequency and with ink ejection frequency In the case where reduce print media 104 conveying speed with answering, reduced by the black flow of the ink of monitor area.It therefore, can be with Pressure loss Δ P in monitor area is suppressed to preset value delta TP or is less than preset value delta TP.Then, printing is carried out (step S7).
Fig. 6 A to 6D is the explanatory diagram in black traffic monitor region.
As shown in Figure 6A, four type element plates 202 of fluid ejection head 102 are arranged to substrate C1, C2, C3 and C4. The fluid ejection head of the present embodiment is length page width type fluid ejection head corresponding with the width of print media, but for letter Change description, will be described with the structure of four type element plates.Fig. 6 B, 6C and 6D, which are instantiated, to be printed on print media 104 Print pattern 701, and pattern 701 (C1), 701 (C2), 701 (C3) and 701 (C4) correspond respectively to substrate C1, C2, C3 and C4.For ease of description, it is assumed that in the case where the respective printing duty ratio of substrate C1, C2, C3 and C4 is 25%, the pressure loss Become preset value delta TP, and in the case where average printing duty ratio is more than 25%, the pressure loss is more than preset value delta TP.Printing Duty ratio is corresponding with the black applied amount of unit print area, and in the case where printing solid image, and printing duty becomes 100%.
Fig. 6 B is to illustrate the explanatory diagram for the case where printing duty ratio of all substrate C1, C2, C3 and C4 are 25%.This In the case of, the average printing duty ratio of entire fluid ejection head 102 becomes 25%, therefore can be with normal print image.Fig. 6 C is The printing duty ratio for illustrating substrate C1, C2 and C3 is 0% and the explanatory diagram of the printing duty ratio of substrate C4 the case where being 100%. Even in this case, the average printing duty ratio of entire fluid ejection head 102 also becomes 25%.However, due to substrate C4 Printing duty ratio be 100%, therefore ink flows to the branch flow passage 304 (4) of substrate C4 too much, thus the pressure loss increases. In this case, if being more than 25% to control black stream for condition with the average printing duty ratio of entire fluid ejection head 102 Amount, then there is following worry: Mo Liuliang is not under control and the ink supply of substrate C4 is insufficient.In order to avoid ink supply deficiency, have Black flow is controlled in the case that the printing duty ratio of any one substrate of the necessity in substrate C1, C2, C3 and C4 is more than 25%.By In the reason, as shown in Figure 6 D, it is also assumed that following situation: the printing duty ratio of substrate C1, C2 and C3 is 0% and substrate C4 is beaten Printing duty ratio is 25%.Then, need to control black flow in the case where the printing duty ratio of substrate C4 is more than 25%.In Fig. 6 D In the case where, the average printing duty ratio of entire fluid ejection head 102 becomes 6%.Therefore, it is necessary to will averagely printing duty ratio suppression It is made as 6%, thus extra-inhibitory Mo Liuliang.Specifically, ink sprays frequency and print media conveying speed needs to be 1/4.
In the present embodiment, consider this situation, (liquid sprays based on type element plate corresponding with black branch flow passage Substrate) respective printing duty ratio, to control black flow.In the examples described above, at least one in substrate C1, C2, C3 and C4 In the case that the printing duty ratio of a substrate is more than 25%, black flow is controlled.
In the present embodiment, as shown in Figure 7 A, monitor area 801 (801 is set as unit of substrate C1, C2, C3 and C4 (1), 801 (2), 801 (3) and 801 (4)), and calculate the pressure loss Δ P in each region.In general, being represented as R in flow impedance [Pa·s/m3] and flow be represented as Q [m3/ s] in the case where, pressure loss Δ P is expressed by following equation (1).
Δ P=R × Q ... (1)
Spray opening quantity be represented as n, spray volume is represented as Vd [m3], spray frequency be represented as fop In the case where [Hz], flow Q is expressed by following equation (2).
Q=n × Vd × fop ... (2)
In the present embodiment, pressure is calculated for each monitor area 801 (801 (1), 801 (2), 801 (3) and 801 (4)) Lose Δ P.That is, as shown in Figure 7 B, calculate the respective pressure loss Δ P of substrate C1, C2, C3 and C4, wherein ink be from Four branch flow passages 304 (304 (1), 304 (2), 304 (3) and 304 (4)) obtained by 303 branch of common flow path are supplied to base Plate C1, C2, C3 and C4's.The interconnecting piece 302a that makes main memory 301 and common flow path 303 be connected to each other and make common flow path Flow impedance between 303 and the interconnecting piece 302b that is connected to each other of fluid ejection head 102 is indicated that the flow of the section is by Q0 by R0 It indicates.Firstly, the flow impedance in branch flow passage 304 (1) is indicated by R1 and the flow of branch flow passage 304 (1) is indicated by Q1 In the case where, the pressure loss Δ P1 of substrate C1 is expressed by following equation (3).
Δ P1=R0 × Q0+R1 × Q1 ... (3)
Similarly, pressure loss Δ P2, the Δ of substrate C2, C3 and C4 are expressed by following equation (4), (5) and (6) P3 and Δ P4.
Δ P2=R0 × Q0+R2 × Q2 ... (4)
Δ P3=R0 × Q0+R3 × Q3 ... (5)
Δ P4=R0 × Q0+R4 × Q4 ... (6)
It is assumed that the pressure loss becomes pre- in the case where the respective printing duty ratio of substrate C1, C2, C3 and C4 becomes 25% Definite value Δ TP, and in the case where average printing duty ratio is more than 25%, the pressure loss is more than preset value delta TP.In printed drawings 6B Print pattern 701 in the case where, since the printing duty ratio of substrate C1, C2, C3 and C4 are less than 25%, there is no need to drop Low ink sprays frequency and print media conveying speed.That is, can in the case where not reducing print speed print image. In the case where print pattern 701 of printed drawings 6C, since the printing duty ratio of substrate C4 is more than 25%, reduces ink and spray Frequency and print media conveying speed are to reduce black flow.Therefore, it is suppressed that the pressure loss, so that ink supply deficiency does not occur.
In order to which substrate common flow path 303 is branched into multiple branch flow passages 304 to multiple 202 ink supply of type element plate Structure is not limited to the structure that a branch flow passage 304 corresponds to a type element plate 202.
For example, as shown in figs. 8 a and 8b, a branch flow passage can correspond to multiple type element plates 202.In Fig. 8 A and In 8B, from branch flow passage 304 (1) to substrate C1 and C2 ink supply, and substrate C1 and C2 are arranged to monitor area 802 (1).This Outside, from branch flow passage 304 (2) to substrate C3 and C4 ink supply, and substrate C3 and C4 are arranged to monitor area 802 (2).This Outside, as illustrated in figures 9a and 9b, a branch flow passage can correspond to the opening battle array of an ejection in a type element plate 202 Column.In Fig. 9 A and Fig. 9 B, from branch flow passage 304 (1) to one of substrate C1 ejection 403 ink supply of aperture array, and the spray Aperture array 403 is arranged to monitor area 803 (1) out.In addition, another ejection from branch flow passage 304 (2) to substrate C1 is opened Mouth 403 ink supply of array, and the ejection aperture array 403 is arranged to monitor area 803 (2).It is equally applicable to Fig. 9 A above Relationship between other branch flow passages and monitor area shown in 9B.In addition, as illustrated in figs. 10 a and 10b, a branch flow passage 304 can correspond to multiple ejections opening 203 of a type element plate 202.In this case, from same branch flow passage The ejection opening 203 of 304 ink supply extremely is arranged to monitor area 804.The case where with Fig. 7 A and 7B, is identical, though Fig. 8 A, 8B, In 9A, 9B, 10A and 10B, the pressure loss of each monitor area is also calculated.Then, it is more than in the pressure loss of any monitor area In the case where threshold value, reduces ink and spray frequency and print media conveying speed to reduce black flow.
By this method, in this embodiment, by from the branch flow passage that common flow path branch obtains to each type element In the structure of plate ink supply, the pressure of each monitor area of type element plate corresponding with branch flow passage is calculated based on image data Loss.Then, in the case where the pressure loss of each monitor area is more than predetermined threshold, ink is sprayed into frequency and print media is defeated Speed is sent to reduce together, so that inhibiting the local pressure loss of fluid ejection head.That is, can be so that being sprayed from liquid The mode that the ink ejection amount per unit time of head reduces, carrys out reliably ink supply.Can according to the variation of droplet size rather than root According to ejection frequency corresponding with ink-jet number per unit time, to control ink ejection amount per unit time.It can control every The ink ejection amount of unit time, so that the black flow of each monitor area becomes predetermined amount of flow or is less than predetermined amount of flow.The present invention is not It is limited to above-described embodiment.For example, including that can be directed to more from the structure for multiple branch flow passages that common flow path branch obtains A monitor area is arranged in a branch flow passage, or multiple monitor areas can be arranged for each branch flow passage, and can count Calculate the pressure loss of each monitor area.
(second embodiment)
In the first embodiment, 203 the two of common liquid room 407 is arranged in spraying opening as Fig. 4 A, 4B and 4C Side and by from the branch flow passage that common flow path branch obtains into the structure of type element plate ink supply, calculate type element The pressure loss of each monitor area corresponding with branch flow passage of plate.In a second embodiment, for being supplied to ejection opening Multiple openings of ink are formed in the structure in fluid ejection head, calculate the pressure loss as unit of opening.
In addition, the printing device of the present embodiment is serial scan type printing device as shown in Figure 11 A.Fluid ejection head 102 are mounted on balladeur train 54, and by mobile mechanism (not illustrating) with the main scanning direction represented by arrow X of balladeur train 54 On be movable in a reciprocal manner.By being configured as the supply unit 103 of conveying roller or conveyer belt, represented by the arrow Y with Main scanning direction, which intersects, conveys print media 104 on the sub-scanning direction of (being in this example orthogonal).The exemplary conveying is single Member 103 is configured as conveying print media 104 by conveying roller.Image is successively printed upon print media as follows On 104: be alternately repeated progress fluid ejection head 102 with balladeur train 54 moves on main scanning direction while from liquid spray The operation of first 102 ink-jet and the operation that print media 104 is conveyed on sub-scanning direction.
(structure of fluid ejection head)
Figure 11 B is to illustrate the perspective view of the major part of fluid ejection head 102 of the present embodiment.It is sprayed in the exemplary liquid Lift one's head in 102, single type element plate 202 is supported by support member 201.Multiple ejections 203 quilts of opening of type element plate 202 It is arranged as foring the ejection aperture array extended along the direction for intersecting (being in this example orthogonal) with main scanning direction.Printing The structure of element board 202 is not limited to the example.For example, multiple type element plates 202 can be arranged.
(structure of ink feeding system)
Figure 12 is to illustrate the schematic diagram of the ink feeding system of 102 ink supply of fluid ejection head to the present embodiment.It is sprayed in liquid In first 102, by common flow path 303 from 301 ink supply of main memory.Make common flow path 303 and master by fluid connection 302a Reservoir 301 is connected to each other, and so that common flow path 303 and fluid ejection head 102 is connected to each other by fluid connection 302b.For It is given to black inflow side opening 1401 (1401 (1), 1401 by obtaining from 303 branch of common flow path of fluid ejection head 102 (2) and 1401 (3)) be fed into and be open 1401 corresponding ejection openings.It is described below and flows into side opening 1401.
(structure of type element plate)
Figure 13 A, 13B and 13C are to illustrate the explanatory diagram of the topology example of type element plate 202 of fluid ejection head 102.
In the exemplary type element plate 202, as shown in FIG. 13A, substrate 402 and cover plate 1501 are engaged with each other, base Plate 402 and orifice plate 401 are engaged with each other.Orifice plate 401 is equipped with multiple ejections opening 203.Multiple ejection openings 203 are arranged to shape At the ejection aperture array 403 for intersecting (in this example, being orthogonal) with main scanning direction represented by arrow X.It can pass through Semiconductor processes exist the electronic device configuration for spraying energy generating element, electronic circuit, electric wire and temperature sensor etc. The front of substrate 402.Due to this reason, it is therefore desirable for the semiconductor substrate for being formed with flow path will be handled by MEMS The material of (Si etc.) as substrate 402.Material of any materials as orifice plate 401 can be used.It is, for example, possible to use energy It is enough formed with by laser treatment and sprays the resin substrate of opening, the inorganic board for spraying opening, energy can be formed with by cutting It is enough formed with the photosensitive resin material for spraying opening and flow path by photocuring and can be handled by MEMS and is formed with ejection The semiconductor substrate of opening and flow path.
Figure 13 B is the enlarged perspective illustrated from the type element plate 202 in the case where the viewing of orifice plate 401.In substrate 402 Pressure chamber 404 is formed in space between orifice plate 401.It is configured at the position towards ejection opening 203 of substrate 402 From the ejection energy generating element 405 for spraying 203 ink-jets of opening.As energy generating element 405 is sprayed, electric heating can be used and turn Change element (heater) or piezoelectric element.By vertical supply opening 1502 to 404 ink supply of pressure chamber.Figure 13 C is along Figure 13 B Type element plate 202 line XIIIC-XIIIC interception sectional view.Vertical supply opening 1502 is formed in base by perforation In plate 402, and the inflow side back side flow path 1503 being connected to vertical supply opening 1502 is fluidly connected to cover plate 1501 Flow into side opening 1401.
(the control example of Mo Liuliang)
As shown in figure 12, the black traffic monitor region of the present embodiment is and the opening that obtains from 303 branch of common flow path The corresponding region 805 (805 (1), 805 (2) and 805 (3)) in 1401 (1401 (1), 1401 (2) and 1401 (3)), wherein region 805 (805 (1), 805 (2) and 805 (3)) include spraying opening 203.Mainly from opening 1401 corresponding with monitor area 805 Ejection 203 ink supply of opening into monitor area 805.
Figure 14 is to illustrate the flow chart of the black flow control processing of the present embodiment.Similar to first embodiment, it is based on image Data calculate pressure loss Δ P (the step S1 to step S5) of each monitor area 805.Then, judge whether pressure loss Δ P surpasses Cross preset value delta TP (step S6).In the case where pressure loss Δ P is less than preset value delta TP, in the feelings for not controlling black flow Printing (step S7) is carried out under condition.On the other hand, in the case where pressure loss Δ P is more than preset value delta TP, control ink Flow (step S11).In the present embodiment, it is reducing ink ejection frequency and the movement speed of balladeur train 54 and ink is made to spray frequency Reduction accordingly decrease in the case where, pass through monitor area ink black flow reduce.Furthermore, it is possible to reduce print media 104 conveying speed.Therefore, the pressure loss Δ P in monitor area can be suppressed to preset value delta TP or be less than predetermined value ΔTP.Then, printing (step S7) is carried out.
The fluid ejection head of the present embodiment is not limited to the structure illustrated in Figure 12,13A, 13B and 13C.It is, for example, possible to use Fluid ejection head including multiple type element plates as in the first embodiment, and the present embodiment is also applied for this liquid Body ejecting head.
By this method, the fluid ejection head of the present embodiment has the following structure: arrange one or more type element plates, and And the inflow side back side flow path 1503 being connected to vertical supply opening 1502 is connected to the inflow side opening 1401 of cover plate 1501. In this fluid ejection head, surveillance zone corresponding with the inflow side opening 1401 obtained from 303 branch of common flow path is calculated The respective pressure loss Δ P in domain 805.Then, in the feelings that the pressure loss Δ P of each monitor area 805 is more than predetermined threshold delta TP Under condition, reduces ink and spray frequency and balladeur train movement speed, allow to inhibit the local pressure loss of fluid ejection head.This In the case of, print media conveying speed can also be reduced.
In addition, the present disclosure additionally applies for such as flowering structures: calculating the pressure of each monitor area on the boundary based on aperture position The structure of loss or the knot for calculating the boundary based on aperture position and the respective pressure loss of monitor area of further division Structure.
(3rd embodiment)
In the topology example of second embodiment, with surveillance zone corresponding with the branch flow passage to fluid ejection head ink supply Domain is unit to calculate the pressure loss.In the third embodiment, side is collected from side opening flow direction is flowed by spraying opening in ink In the so-called loop structure of opening, calculated as unit of monitor area corresponding with inflow side opening and collection side opening The pressure loss.
(structure of ink feeding system)
Figure 15 is the schematic diagram illustrated to according to the ink feeding system of 102 ink supply of fluid ejection head of the present embodiment.Pass through confession Black flow path 1602 supplies the ink inside accumulator 1601 to fluid ejection head 102.It is supplied to one of the ink of fluid ejection head 102 Divide and sprayed from ejection opening 203, and other ink are passed through into black flow paths 1607 of collecting and are collected into accumulator 1601.Passing through ink supply stream The negative pressure adjustment device 1603 and ink being equipped in road 1602 collect the constant-flow pump 1606 being equipped in flow path 1607 in accumulator While generating black recycle stream between 1601 and fluid ejection head 102, adjustment sprays the black pressure of opening 203.Generate ink circulation The constant-flow pump 1606 and negative pressure adjustment device 1603 of stream can be integrally equipped with fluid ejection heads 102, or can be with The outside of fluid ejection head 102 is attached in such a way that supply pipe etc. is connected to fluid ejection head 102.Furthermore, it is possible to will The MEMS element of Micropump etc. is assembled in type element plate.
(structure of type element plate)
Figure 16 A to Figure 16 C is the explanatory diagram of the topology example of the type element plate 202 of illustration fluid ejection head 102, and Type element plate 202 has structure identical with second embodiment.
Figure 16 B is the enlarged perspective illustrated from the type element plate 202 in the case where the viewing of orifice plate 401.In substrate 402 Pressure chamber 404 is formed in space between orifice plate 401.It is configured at the position towards ejection opening 203 of substrate 402 From the ejection energy generating element 405 for spraying 203 ink-jets of opening.As energy generating element 405 is sprayed, electric heating can be used and turn Change element (heater) or piezoelectric element.By vertical supply opening 1502 to 404 ink supply of pressure chamber.Figure 16 C is along Figure 16 B Type element plate 202 line XVIC-XVIC interception sectional view.It flows into flow path 1604 and collects flow path 1605 and be fluidly connected to A series of pressure chamber 404, to form flow paths.Therefore, ink collects flow path from the flow direction of flow path 1604 is flowed by pressure chamber 404 1605.Vertical supply opening 1502 and vertical collection opening 1701 penetrate substrate 402 and respectively with flow into flow path 1604 and collect Flow path 1605 is connected to.In addition, the inflow side back side flow path 1503 that is connected to vertical supply opening 1502 and being opened with vertical collection The collections side back surface current roads 1702 of mouthfuls 1701 connections respectively with the inflow side opening 1401 of cover plate 1501 and collection side opening 1703 connections.
In the present embodiment, it is forming black circulating path and is generating ink stream to flow path 1605 is collected from flow path 1604 is flowed into In the case that driving sprays energy generating element 405 under state, from ejection 203 ink-jets of opening.Even if from flow into flow path 1604 Ink ejection operation is carried out to collecting in the state that flow path 1605 generates ink stream, the influence to ink droplet landing precision is also small.
(the control example of Mo Liuliang)
Description is worried from the structure for flowing into the embodiment that side opening flow direction collects side opening in ink by spraying opening The reason of ink supply deficiency in the ejection opening of the end of type element plate.Figure 28 A is the type element illustrated in Figure 16 A The top view of plate 202, Figure 28 B be the part A of Figure 28 A enlarged drawing and Figure 28 C be Figure 28 A type element plate 202 after View.Figure 29 is to illustrate the sectional view of type element plate 10 and cover plate 20 along the line XXIX-XXIX interception of Figure 28 A.Such as Shown in Figure 29, black circulation is collected from the opening 21 of cover plate 20 by liquid supply path 18, pressure chamber 23 and liquid Path 19.Due to from the opening 21 for spraying the end of arranged direction of opening 13 is located to the ejection opening 13 for being located at the end Until liquid supply path 18 or liquid collecting path 19 flow path length increase, therefore the pressure loss increase.In addition, from Multiple ejections are open in the case where 13 ink-jets, and the pressure loss is due also to inside liquid supply path 18 or liquid collecting path 19 The increase of black flow and increase.
It is identical as second embodiment, in the feelings for controlling black flow based on the pressure loss of each monitor area as shown in Figure 14 Under condition, the ink supply as caused by the pressure loss can be inhibited insufficient.
In the present embodiment, as shown in figure 17, it is flowed from 1503 branch of inflow side back side flow path for being used as common flow path Enter side opening 1401 (1401 (1), 1401 (2) and 1401 (3)).In addition, from the collection side back surface current road for being used as common flow path 1702 mark off collection side opening 1703 (1703 (1), 1703 (2)).As shown in figure 16 c, pass through the inflow as common flow path Side back surface current road 1503, to the supply of multiple pressure chambers 404 from 1501 place of cover plate at the back side that type element plate 202 is arranged in The ink that multiple inflow side openings 1401 supply formed comes.Then, ink is by the collection side back surface current road as common flow path 1702, and be supplied to and collect side opening 1703.The monitor area of the present embodiment include respectively with flow into side opening 1401 and receive Collect the region 806 (806 (1) to 806 (5)) of the corresponding nozzle array 403 of side opening 1703.
Calculate the pressure loss of each monitor area 806.At this point, in view of each black circular flow Q ' for spraying opening 203 In the case where, flow Q is expressed by following equation (7).Here, the quantity of all nozzles in monitor area is by n ' table Show.
Q=(n × Vd × fop)+(n ' × Q ') ... (7)
Here, as described above, ink circular flow Q ' has the small influence to the ink droplet landing precision during ink ejection operation.
Calculate respectively with flow into side opening 1401 and collection the respective pressure of the corresponding monitor area 806 of side opening 1703 The method of loss and the method for first embodiment are identical.Fluid ejection head is not limited to structure shown in Figure 16 A, 16B, 16C and 17, As long as ink can recycle.By this method, the fluid ejection head of the present embodiment has the following structure: configuration one or more is beaten Printing elements plate, inflow side back side flow path 1503 are connected to vertical supply opening 1502, and are collected side back surface current road 1702 and hung down It is straight to collect 1701 connection of opening.At the inflow side back side flow path 1503 and collect side back surface current road 1702 respectively with cover plate 1501 In the case that inflow side opening 1401 is connected to collection side opening 1703, black circulation stream is formed.In this fluid ejection head, It calculates and flows into side opening 1401 and collect the respective pressure loss of the corresponding monitor area 806 of side opening 1703, and be based on The pressure loss controls black flow.Therefore, because inhibiting the local pressure loss of fluid ejection head, therefore can normally spray Ink.
Additionally, this invention is not limited to above-mentioned examples.For example, may be exemplified such as flowering structure: calculating the side based on aperture position The structure of the pressure loss of each monitor area on boundary or the surveillance zone for calculating the boundary based on aperture position and further division The structure of the respective pressure loss in domain.Particularly, in the case where the boundary further division monitor area based on aperture position, It can inhibit the pressure loss in more details.
(fourth embodiment)
Figure 18 to 30 is to illustrate the explanatory diagram of the fourth embodiment of the present invention.Here, it is arranged identical with 3rd embodiment Black circulating path.It is identical as 3rd embodiment, it is being provided with monitor area and ink is controlled based on the pressure loss of each monitor area In the case where flow, the local pressure loss of fluid ejection head can be inhibited.
(description of ink jet printing device)
Figure 18 is to illustrate the liquid discharge apparatus of the ejection liquid in the present invention, particularly by ink-jet come print image The figure of the schematic structure of ink jet printing device (hereinafter, also known as printing device) 1000.Printing device 1000 includes conveying The supply unit 1 of print media 2 and it is configured as the row type substantially orthogonal with the conveying direction of print media 2 (page width type) liquid Body ejecting head 3.Then, printing device 1000 is following row type printing device, and wherein the row type printing device passes through continuous Or ink is ejected on the print media 2 of relative movement in the case where interruption conveying print media 2, it is continuous in primary pass through Print image.Fluid ejection head 3 includes the vacuum cavitations unit 230 and negative pressure of the pressure (negative pressure) of control loop inside track The fluid supply unit 220 that control unit 230 is connected to, the ink supply opening as fluid supply unit 220 and ink collect opening Fluid connection 111 and shell 80.Print media 2 is not limited to single-sheet stationery, and can also be continuous web media.Liquid Body ejecting head 3 can use the ink of cyan C, magenta M, yellow Y and black K to print full-colour image, and be fluidly connected to As (supplying liquid to fluid ejection head 3) feed path liquid feeding parts, main memory and buffer (referring to Figure 19 to be described later).In addition, powering to fluid ejection head 3 and sending the control unit electrical connection for spraying control signal To fluid ejection head 3.Liquid path and electrical signal path in fluid ejection head 3 will be described later.
Printing device 1000 is to follow the liquid of ink etc. between the reservoir and fluid ejection head 3 to be described later The ink jet printing device of ring.Loop structure includes first circulation structure and second circulation structure, wherein in first circulation structure In, make liquid circulation by (high pressure with and low pressure) two circulating pumps in 3 downstream side of start liquid ejecting head, second In loop structure, follow liquid by (high pressure with and low pressure) two circulating pumps of 3 upstream side of start liquid ejecting head Ring.Hereinafter, by the first circulation structure and second circulation structure of description circulation.
(description of first circulation structure)
Figure 19 is showing for first circulation structure of the illustration suitable for the circulating path of the printing device 1000 of the present embodiment It is intended to.Fluid ejection head 3 is fluidly connected to first circulation pump (high-pressure side) 1001, first circulation pump (low-pressure side) 1002 and delays Rush reservoir 1003.In addition, to simplify the description, illustrating one in cyan C, magenta M, yellow Y and black K in Figure 19 The path that the ink of a color is flowed through.However, in fact, being provided with four kinds of face in fluid ejection head 3 and printing device ontology The circulating path of color.
In first circulation structure, the ink inside main memory 1006 is fed into buffer by make-up pump 1005 In 1003, then supplied by second circulation pump 1004 via the liquid that fluid connection 111 is fed into fluid ejection head 3 single Member 220.Then, two different negative pressure are adjusted to and being connected to the vacuum cavitations unit 230 of fluid supply unit 220 The ink of (high pressure and low pressure) is recycled with being divided into two flow paths with high pressure and low pressure.Inside fluid ejection head 3 Ink pumps (high-pressure side) 1001 by the first circulation in 3 downstream side of fluid ejection head and first circulation pumps the effect of (low-pressure side) 1002 And recycled in fluid ejection head, it is collected via fluid connection 111 from fluid ejection head 3, and be returned to buffer storage Device 1003.
Buffer 1003 as storage secondary is connected to main memory 1006, and including will be in reservoir 1003 The atmosphere opening (not illustrating) that portion is connected to outside, it is possible thereby to which the bubble in ink is collected into outside.Make-up pump 1005 It is arranged between buffer 1003 and main memory 1006.By being sprayed from liquid in printing and suction recovery operation Lift one's head 3 ejection opening spray (discharge) ink and consume it is black after, ink is transmitted to slow by make-up pump 1005 from main memory 1006 Rush reservoir 1003.
Two first circulations pump 1001 and 1,002 111 sucking liquids of fluid connection from fluid ejection head 3, so that liquid Flow to buffer 1003.It is pumped as first circulation, is contemplated to be the volume type pump with quantitative liquid transfer capability.Specifically It says, may be exemplified tubing pump, gear pump, diaphragm pump and syringe pump.However, for example general perseverance can be configured in the exit of pump Valve or general safety valve are flowed, to ensure predetermined amount of flow.In the case where driving fluid ejection head 3, operation first circulation pump is (high Press side) 1001 and first circulation pump (low-pressure side) 1002 so that ink with predetermined amount of flow flow through common feed flow path 211 and share receive Collect flow path 212.Since ink flows by this method, the temperature of the fluid ejection head 3 during printing is maintained at best temperature Degree.It is expected that predetermined amount of flow when fluid ejection head 3 will be driven to be equal to or be higher than such as down-off, the flow the case where Under, the temperature difference between type element plate 10 inside fluid ejection head 3 does not influence print quality.Nevertheless, but being arranged In the case where excessively high flow, the pressure of Negative Pressure Difference between type element plate 10 due to the flow path inside liquid spray unit 300 The influence of power loss and increase, therefore cause uneven concentration.Due to this reason, it is expected that in view of between type element plate 10 Temperature difference and Negative Pressure Difference in the case where flow is set.
Vacuum cavitations unit 230 is arranged in the path between second circulation pump 1004 and liquid spray unit 300.Operation Vacuum cavitations unit 230, so that even if in black flow due to the difference of the ink ejection amount of per unit area in the circulatory system And in the case where changing, the pressure (that is, pressure near liquid spray unit 300) in 230 downstream side of vacuum cavitations unit is also protected It holds in predetermined pressure.As two negative pressure controls for constituting vacuum cavitations unit 230, any mechanism can be used, as long as The pressure in 230 downstream side of vacuum cavitations unit can be controlled within the preset range centered on desired setting pressure i.e. It can.As an example, can be using the mechanism of so-called " pressure reducing regulator " etc..In the circulation stream of the present embodiment, the Two circulating pumps 1004 pressurize via upstream side of the fluid supply unit 220 to vacuum cavitations unit 230.Using this structure, by In being able to suppress influence of the head pressure of buffer 1003 to fluid ejection head 3, therefore being capable of expanding printing equipment The layout freedom of 1000 buffer 1003.
As second circulation pump 1004, turbine pump or volume type pump can be used, as long as in the feelings of driving fluid ejection head 3 The lift pressure of predetermined lift pressure or bigger is presented under condition in the range of used ink circular flow.Specifically, may be used To use diaphragm pump.In addition, for example, instead of second circulation pump 1004, can also use be configured as relative to vacuum cavitations list Head reservoir of the member 230 with certain head difference.As shown in figure 19, vacuum cavitations unit 230 includes being respectively provided with different controls Two negative pressure regulating mechanisms of pressing pressure.In two negative pressure regulating mechanisms, (being indicated by " H " in Figure 19) relatively high pressure side (being indicated by " L " in Figure 19) relatively low pressure side is connected respectively to liquid spray unit 300 via fluid supply unit 220 Internal common feed flow path 211 and shared collection flow path 212.Liquid spray unit 300 equipped with common feed flow path 211, It shares and collects flow path 212 and the individual flow path 215 being connected to type element plate (individual supply line 213 and individual collection stream Road 214).Negative pressure control H is connected to common feed flow path 211, and negative pressure control L, which is connected to share, collects flow path 212, And differential pressure is formed between two common flow paths 211 and 212.Then, due to individual flow path 215 and shared supply line 211 Be connected to shared collection flow path 212, therefore generate following stream (stream indicated by the arrow direction of Figure 19): partially liq passes through The flow path formed inside type element plate 10, which flows to share from common feed flow path 211, collects flow path 212.
By this method, liquid spray unit 300 has following stream: passing through 211 He of common feed flow path in liquid flowing While sharing collection flow path 212, a part of liquid passes through type element plate 10.Due to this reason, therefore ink can be passed through It flows through common feed flow path 211 and shares and collect flow path 212, the heat generated of type element plate 10 is collected into type element plate 10 outside.Using this structure, in the case where 3 print image of fluid ejection head, even if not spraying in pressure chamber or liquid Ejection opening in, also can be generated ink stream.It therefore, can be so that the viscosity for spraying the ink of open interior retrogradation reduces Mode, to inhibit black retrogradation.Furthermore, it is possible to the foreign matter in the ink from retrogradation to shared collection flow path 212 or ink of collecting.Due to the original Cause, the fluid ejection head 3 of the present embodiment can print high quality images at high speed.
(description of second circulation structure)
Figure 20 be illustrate suitable for the circulating path of the printing device of the present embodiment, as with first circulation structure not The schematic diagram of the second circulation structure of same loop structure.It is with the main difference of first circulation structure, constitutes vacuum cavitations Two negative pressure controls of unit 230 are by the pressure control of 230 upstream side of vacuum cavitations unit with desired setting pressure Within preset range centered on power.In addition, another difference with first circulation structure is, second circulation pump 1004, which is used as, to be subtracted The negative pressure source of the pressure in small 230 downstream side of vacuum cavitations unit.In addition, another difference is, first circulation pumps (high-pressure side) 1001 and the first circulation pump configuration of (low-pressure side) 1002 in the upstream side of fluid ejection head 3, and vacuum cavitations unit 230 configures In the downstream side of fluid ejection head 3.
In second circulation structure, the ink inside main memory 1006 is supplied to buffer by make-up pump 1005 1003.Then, ink is divided into two flow paths, and passes through vacuum cavitations unit 230 set in fluid ejection head 3 It acts on and is recycled in two flow paths of high-pressure side and low-pressure side.(high-pressure side) 1001 and first circulation pump are pumped by first circulation The effect of (low-pressure side) 1002, the ink being divided into two flow paths of high-pressure side and low-pressure side are supplied via fluid connection 111 To fluid ejection head 3.Then, by vacuum cavitations unit 230 and fluid connection 111, pass through from the collection of fluid ejection head 3 The effect of first circulation pump (high-pressure side) 1001 and first circulation pump (low-pressure side) 1002 and recycled inside fluid ejection head Ink.Second circulation pump 1004 makes the ink being collected into be back to buffer 1003.
In second circulation structure, though due to the ink ejection amount of per unit area variation and cause the variation of flow, bear Pressure control unit 230 also stablizes the pressure change of 230 upstream side of vacuum cavitations unit (that is, 300 side of liquid spray unit) In preset range centered on predetermined pressure.In the circulation stream of the present embodiment, second circulation pump 1004 is supplied via liquid It pressurizes to unit 220 to the downstream side of vacuum cavitations unit 230.Using this structure, since buffer can be inhibited Influence of 1003 head pressure to fluid ejection head 3, therefore the layout of the buffer 1003 in printing device 1000 can With there are many options.Instead of second circulation pump 1004, such as it also can be used and be configured as having relative to vacuum cavitations unit 230 There is the head reservoir of predetermined head difference.It is identical as first circulation structure, in second circulation structure, vacuum cavitations unit 230 Two negative pressure regulating mechanisms including being respectively provided with different control pressure.In two negative pressure regulating mechanisms, (by Figure 20 " H " is indicated) high-pressure side and (being indicated by " L " in Figure 20) low-pressure side be connected respectively to via fluid supply unit 220 Common feed flow path 211 and shared collection flow path 212 inside liquid spray unit 300.It will be total in two negative pressure regulating mechanisms It is disposed higher than with the pressure of supply line 211 in the case where sharing the pressure for collecting flow path 212, via individual 215 He of flow path The flow path formed inside type element plate 10 is formed from common feed flow path 211 to the stream of the shared liquid for collecting flow path 212.
In this second circulation structure, it can be obtained inside liquid spray unit 300 and the liquid of first circulation structure The identical liquid flow of body stream, but the liquid flow of second circulation structure has two different from the liquid flow of first circulation structure excellent Point.As the first advantage, in second circulation structure, since vacuum cavitations unit 230 is configured in the downstream of fluid ejection head 3 Side, therefore do not have to the foreign matter for worrying to generate from vacuum cavitations unit 230 or waste inflow fluid ejection head 3.As the second advantage, In second circulation structure, the maximum value of flow needed for the liquid supplied from buffer 1003 to fluid ejection head 3 is small The maximum value of the flow needed for the liquid that the slave buffer 1003 of first circulation structure is supplied to fluid ejection head 3.It is former Because as follows.
Under printing standby mode recycle in the case where, common feed flow path 211 and share collect flow path 212 flow it Be arranged to flow A.The value of flow A be defined as in the case where printing standby mode adjust fluid ejection head 3 temperature so that Temperature difference inside liquid spray unit 300 falls into minimum discharge required in expected range.In addition, from liquid spray unit (spraying state entirely) in the case where 300 all ejections opening ink-jet, ejection flow obtained is defined as flow F (each ejection The ejection frequency of the spray volume of opening × per unit time × ejection opening quantity).
Figure 21 is to illustrate black influx between first circulation structure and second circulation structure, to fluid ejection head 3 The schematic diagram of difference.The part (b) of standby mode and Figure 21 that the part (a) of Figure 21 illustrates first circulation structure illustrates first The full ejection state of loop structure.The part (c) to (f) of Figure 21 illustrates second circulation structure.Here, the part (c) of Figure 21 and (d) part (e) and (f) for illustrating the case where flow F is lower than flow A and Figure 21 illustrate the case where flow F is higher than flow A.With This mode illustrates the flow under standby mode and full ejection state.
Liquid is configured in the first circulation pump 1001 and first circulation pump 1002 respectively with quantitative liquid transfer capability In the case where the first circulation structure (part (a) of Figure 21 and (b)) in the downstream side of body ejecting head 3, first circulation pumps 1001 Hes The total flow of first circulation pump 1002 becomes flow A.According to flow A, the liquid spray unit 300 under standby mode can be managed Internal temperature.Then, in the case where the full ejection state of fluid ejection head 3, first circulation pump 1001 and first circulation pump 1002 total flow becomes flow A.However, the effect of the negative pressure generated and by the ejection of fluid ejection head 3, is supplied To the maximum stream flow of the liquid of fluid ejection head 3, so that the full flow F for spraying consumption is added with the flow A of total flow.In this way, Since flow F is added (part (b) of Figure 21) with flow A, until the maximum value of the supply amount of fluid ejection head 3 meets (stream Measure A+ flow F) relationship.
On the other hand, the upstream side of fluid ejection head 3 is configured in first circulation pump 1001 and first circulation pump 1002 The second circulation structure part (c) of Figure 21 (and (d)) in the case where, it is identical as first circulation structure, print standby mode institute The supply amount to fluid ejection head 3 needed becomes flow A.Therefore, matched in first circulation pump 1001 and first circulation pump 1002 Set the feelings that the flow A in the second circulation structure of the upstream side of fluid ejection head 3 is higher than flow F (part (c) of Figure 21 and (d)) Under condition, even if under full ejection state, until the supply amount of fluid ejection head 3 is also enough to become flow A.At this point, fluid ejection head 3 Collection flow meet relationship (flow A- flow F) (part (d) of Figure 21).However, being higher than the (portion of Figure 21 flow A in flow F Divide (e) and (f)) in the case where, the feelings that become flow A are supplied under full ejection state to the flow of the liquid of fluid ejection head 3 Under condition, flow becomes insufficient.Due to this reason, in the case where flow F is higher than flow A, until the supply amount of fluid ejection head 3 needs It is set as flow F.At this point, due under full ejection state fluid ejection head 3 consume flow F, from fluid ejection head 3 The flow of the liquid of collection almost becomes 0 (part (f) of Figure 21).In addition, if being sprayed in the case where flow F is higher than flow A Liquid but be not to spray liquid under full ejection state out, then collect from fluid ejection head 3 and be attracted the ejection institute of flow F The liquid of the amount of consumption.The liquid for the amount consumed by the ejection of flow F that reduces is discharged from fluid ejection head 3.In addition, in flow In the case that F and flow A is equal to each other, to 3 supply flow rate A (or flow F) of fluid ejection head, and consumed by fluid ejection head 3 Flow F.Due to this reason, almost become 0 from the flow that fluid ejection head 3 is collected into.
By this method, it in the case where second circulation structure, is set for first circulation pump 1001 and first circulation pump 1002 The aggregate value (that is, maximum value of necessary supply flow rate) for the flow set becomes the larger value between flow A and flow F.Due to The reason, as long as using having mutually isostructural liquid spray unit 300, the maximum of supply amount needed for second circulation structure The maximum value (flow A+ flow F) of supply flow rate needed for value (flow A or flow F) becomes smaller than first circulation structure.
Due to this reason, therefore in the case where second circulation structure, the freedom degree of circulating pump applicatory increases.Example Such as, the circulating pump with simple structure and low cost can be used, or cooling set in main body side path can be reduced The load of device (not shown).Accordingly, there exist following advantages: can reduce the cost of printing device.The advantage is in flow A or flow It is obvious in the relatively large row type head (line head) of the value of F.Therefore, the row type head with long long side length in row type head It is beneficial.
On the other hand, first circulation structure is more advantageous than second circulation structure.That is, in second circulation structure, Flow due to flowing through liquid spray unit 300 in the case where printing standby mode becomes maximum, and image is (hereinafter, also referred to as Low duty ratio image) per unit area spray volume it is smaller, to spray opening apply negative pressure it is higher.Due to this reason, exist In the case that flow path width is narrow and negative pressure is high, in being easy to appear non-uniform low duty ratio image, high negative pressure is applied to Spray opening.Accordingly, there exist following worries: print quality may be according to the so-called satellite droplet that the main drop with inking sprays The increase of quantity and deteriorate.
On the other hand, in the case where first circulation structure, due to the image big in the spray volume for forming per unit area High negative pressure is applied to ejection opening in the case where (also called hereinafter high duty ratio image), therefore there are following advantages: Even if influence of the satellite droplet to image is also smaller in the case where generating many satellite droplets.In view of fluid ejection head and It, can be in the case where the specification (spraying flow F, the flow path impedance inside minimal circulation flow A and head) of printing device ontology Hope two loop structures of ground selection.
(description of the structure of fluid ejection head)
By description according to the structure of the fluid ejection head 3 of the present embodiment.Figure 22 A and Figure 22 B are illustrated according to the present embodiment Fluid ejection head 3 perspective view.Fluid ejection head 3 is row type fluid ejection head, wherein in the row type fluid ejection head, string Row arrangement (arranged in series) can spray 15 printings member of the ink of four kinds of colors (cyan C, magenta M, yellow Y and black K) Part plate 10.As shown in fig. 22, fluid ejection head 3 includes type element plate 10, signal input terminal 91 and power supply terminal 92.This A little terminals 91 and 92 are connected electrically to type element plate 10 via flexible circuit board 40 and electric wiring plate 90.Signal input part Son 91 and power supply terminal 92 are connected electrically to the control unit of printing device 1000, drive so that supplying to spray to type element plate 10 Electric power needed for dynamic signal and ejection.Electronic circuit inside electric wiring plate 90 and is beaten in the integrated situation of wiring The quantity of printing elements plate 10 is compared, it is possible to reduce the quantity of signal input terminal 91 and power supply terminal 92.Therefore, it is sprayed by liquid The quantity for 3 electric connection components to be separated when being assembled to printing device 1000 or replacing fluid ejection head of lifting one's head is reduced.Such as figure Shown in 22B, the liquid that fluid connection 111 set by two ends of fluid ejection head 3 is connected to printing device 1000 is supplied To system.Therefore, include cyan C, magenta M, yellow Y from the feed system of printing device 1000 to the supply of fluid ejection head 3 With the ink of black K these four colors, and the feed system of printing device 1000 collects the ink for passing through fluid ejection head 3.With this The ink of mode, different colours can be recycled via the path of printing device 1000 and the path of fluid ejection head 3.
Figure 23 is to illustrate the exploded perspective view of the component or unit that constitute fluid ejection head 3.Liquid spray unit 300, liquid Object supply unit 220 and electric wiring plate 90 are attached to shell 80.Fluid connection 111 (referring to fig. 2 0) setting is supplied in liquid In unit 220.In addition, in order to remove the foreign matter in supplied ink, for different colours filter 221 (referring to Figure 19 and 20) it is arranged inside fluid supply unit 220, and the open communication with fluid connection 111.Two fluid supply units 220 are respectively equipped with filter 221 corresponding with two kinds of colors.In first circulation structure as shown in figure 19, to it is each Color is configured accordingly the liquid that the vacuum cavitations unit 230 on fluid supply unit 220 is fed past filter 221. Vacuum cavitations unit 230 is the unit for including negative pressure control valve corresponding with different colours.By in these negative pressure control valves The spring members of setting or the function of valve, the feed system (liquid of the printing device 1000 as caused by the variation of fluid flow The feed system of 3 upstream side of ejecting head) variation of the internal pressure loss substantially reduces.Therefore, vacuum cavitations unit 230 can be with The negative pressure variation of vacuum cavitations unit downstream side (300 side of liquid spray unit) is stablized within a predetermined range.As described in Figure 19, Two negative pressure control valves corresponding with each color are built in vacuum cavitations unit 230.Two negative pressure control valves are set respectively For different control pressure.Here, the high-pressure side of two negative pressure control valves is via fluid supply unit 220 and liquid spray unit Common feed flow path 211 (referring to Figure 19) connection inside 300, and the low-pressure side of two negative pressure control valves is supplied via liquid Unit 220 is connected to collection flow path 212 (referring to Figure 19) is shared.
Shell 80 includes liquid spray unit support portion 81 and electric wiring plate support portion 82, and is sprayed in support liquid Ensure the rigidity of fluid ejection head 3 in the case where unit 300 and electric wiring plate 90.Electric wiring plate support portion 82 is used to support Electric wiring plate 90, and liquid spray unit support portion 81 is fixed to by screw.Use liquid spray unit support portion 81 The warpage or deformation of liquid spray unit 300 are corrected, to ensure the relative positional accuracy between type element plate 10.Therefore, press down The striped of the image printed on medium and uneven is made.Due to this reason, it is therefore desirable for liquid spray unit support portion 81 has There are enough rigidity.It is expected that the metal of SUS or aluminium etc. or the ceramics of aluminium oxide etc. are as material.Liquid sprays Unit supports portion 81 is equipped with the opening 83 and 84 inserted with connector rubber 100.From fluid supply unit 220 supply liquid via Connector rubber 100 is directed to the third channel member 70 for constituting liquid spray unit 300.
Liquid spray unit 300 includes multiple ejection modules 200 and channel member 210, and coating member 130 is attached to The face close to print media in liquid spray unit 300.Here, coating member 130 is that have picture frame shape as shown in figure 23 Surface and equipped with the component of elongated open 131, and expose from opening 131 and spray printing member included in module 200 Part plate 10 and seal member 110 (referring to Figure 27 A being described later on).The external surrounding frame of opening 131 is used as in the case where printing standby mode Cover the contact surface of the cap member of fluid ejection head 3.Due to this reason, it is therefore desirable for by being coated along the periphery of opening 131 Uneven or gap on the ejection opening face of adhesive, sealing material and packing material to fill liquid spray unit 300 is come Closed space is formed under the state that covers.
Next, the structure that the channel member 210 for including in liquid spray unit 300 will be described.As shown in figure 23, pass through First flow path component 50, second flow path component 60 and third channel member 70 are laminated to obtain channel member 210, and flow path portion The liquid supplied from fluid supply unit 220 is assigned to by part 210 sprays module 200.In addition, channel member 210 is will be from spray The liquid that module 200 is recycled for out returns to the channel member of fluid supply unit 220.Channel member 210 is solid by screw Surely liquid spray unit support portion 81 is arrived, therefore inhibits the warpage or deformation of channel member 210.
The part (a) to (f) of Figure 24 be illustrate first to third channel member front and back figure.The part of Figure 24 (a) part (f) for being equipped with the face and Figure 24 that spray module 200 for illustrating first flow path component 50 illustrates third flow path portion The face of part 70 contacted with liquid spray unit support portion 81.First flow path component 50 and second flow path component 60 are engaged with each other, So that the part corresponding with the contact surface of channel member 50 and 60 of the part (b) of Figure 24 and (c) middle illustration is relative to each other.The Two channel members 60 and third channel member 70 are engaged with each other, so that the part (d) of Figure 24 and (e) middle illustrate and channel member The corresponding part of 60 and 70 contact surface is relative to each other.It is engaged with each other in second flow path component 60 and third channel member 70 In the case of, extend in the longitudinal direction of channel member 8 are formd altogether by the common flow path slot 62 and 71 of channel member With flow path (211a, 211b, 211c, 211d, 212a, 212b, 212c, 212d).Therefore, in 210 inside of channel member and each face Color correspondingly forms common feed flow path 211 and shares the group for collecting flow path 212.It is sprayed from common feed flow path 211 to liquid Lift one's head 3 ink supply, and shares and collect the ink that flow path 212 collects supply to fluid ejection head 3.The connection of third channel member 70 is opened 72 (4 parts (f) referring to fig. 2) of mouth are connected to the corresponding aperture of connector rubber 100, and are fluidly connected to fluid supply unit 220 (referring to fig. 2 3).The bottom surface of the common flow path slot 62 of second flow path component 60 is equipped with multiple connections opening 61 (with common feed The connection opening 61-1 that flow path 211 the is connected to and connection opening 61-2 being connected to shared collection flow path 212).These connections are opened The end connection of the individual flow passage grooves 52 corresponding with first flow path component 50 of mouth 61.First flow path component 50 it is corresponding The other end of individual flow passage groove 52 is fluidly connected to spray module 200 equipped with connection opening 51, and via connection opening 51. By individual flow passage groove 52, the central side of channel member can be densely arranged in flow path.
It is expected that first to third channel member by there is corrosion resistance for liquid and the low material of linear expansion coefficient is formed. For example, as material, can be suitably used by substrate (such as aluminium oxide, LCP (liquid crystal polymer), PPS (polyphenylene sulfide Ether), PSF (polysulfones) or MODIFIED PP E (polyphenylene oxide) etc.) addition inorganic filler (fiber or silica fine particles etc.) and The composite material (resin) of acquisition.As the method for forming channel member 210, three channel members mutually can be laminated and be glued It closes.In the case where selecting composite material as material, the joint method using welding can be used.
Figure 25 be illustrate from first flow path component 50 being equipped with spray module 200 face viewing in the case where, Figure 24 Part (a) part α and the stream inside the channel member 210 that is formed and first to third channel member is interconnected The enlarged partial perspective view on road.Flow path 212 is collected to be alternately arranged common feed flow path 211 from the flow path at both ends and share Mode forms common feed flow path 211 and shares and collects flow path 212.Here, will describe channel member 210 inside flow path it Between connection relationship.
In channel member 210, for the setting of each color along the common feed stream of the longitudinal direction extension of fluid ejection head 3 Road 211 (211a, 211b, 211c, 211d) and shared collection flow path 212 (212a, 212b, 212c, 212d).By individual flow passage groove The 52 individual supply line 213 (213a, 213b, 213c, 213d) formed are connected to being total to for different colours via connection opening 61 With supply line 211.In addition, collecting flow path 214 (214a, 214b, 214c, 214d) warp by the individual that individual flow passage groove 52 is formed The shared collection flow path 212 of different colours is connected to by connection opening 61.Using this flow passage structure, ink can be supplied via individual To flow path 213 from 211 concentrated supply of common feed flow path to the type element plate 10 for the central part for being located at channel member.This Outside, ink can collect flow path 214 via individual and be collected into shared collection flow path 212 from type element plate 10.
Figure 26 is the sectional view intercepted along the line XXVI-XXVI of Figure 25.Individual collects flow path (214a, 214c) via connection Opening 51 is connected to module 200 is sprayed.It in Figure 26, illustrates only individual and collects flow path (214a, 214c), but cut in different In face, as shown in figure 25, individual supply line 213 communicates with each other with module 200 is sprayed.It is each to spray the branch for including in module 200 Support part part 30 and type element plate 10 are set in type element plate 10 equipped with ink to be supplied to from first flow path component 50 The flow path of type element 15.In addition, support member 30 and type element plate 10 are equipped with the liquid for being fed into type element 15 Some or all of collect (recycling) to first flow path component 50 flow path.
Here, the common feed flow path 211 of each color is connected to the negative pressure control of corresponding color via fluid supply unit 220 Unit 230 (high-pressure side) processed, and share collection flow path 212 and be connected to vacuum cavitations unit 230 via fluid supply unit 220 (low-pressure side).By vacuum cavitations unit 230, differential pressure is generated between flow path 212 in common feed flow path 211 and shared collect (pressure difference).Due to this reason, as shown in figs. 25 and 26, inside the fluid ejection head of flow path the present embodiment interconnected, For each color, generates and collect flow path according to common feed flow path 211, individual supply line 213, type element plate 10, individual 214 collect the liquid flow of the sequence of flow path 212 with sharing.
(description for spraying module)
Figure 27 A is to illustrate the perspective view that one sprays module 200 and the exploded view that Figure 27 B is the ejection module 200. The method of module 200 is sprayed as manufacture, is connected firstly, type element plate 10 and flexible circuit board 40 are adhered to equipped with liquid It opens up in the support member 30 of mouth 31.Then, the terminal 41 on the terminal 16 and flexible circuit board 40 on type element plate 10 is logical It crosses with wire bonding and electrically connected to each other, and by seal member 110 come seal lines joint portion (electric connection part).It is flexible The terminal 42 opposite with type element plate 10 of circuit board 40 is connected electrically to the connection terminal 93 of electric wiring plate 90 (referring to figure 23).Since support member 30 is used to support the supporter of type element plate 10 and is used for type element plate 10 and flow path The channel member that component 210 is in fluid communication with each other, it is therefore desirable for support member 30 is put down in the state of being joined to type element plate Whole degree is high and reliability is sufficiently high.For example, it is desirable to which aluminium oxide or resin are as material.
(description of the construction of type element plate)
Figure 28 A is to illustrate the top view equipped with the face for spraying opening 13 of type element plate 10, and Figure 28 B is Figure 28 A The enlarged drawing and Figure 28 C of part A are the top views at the back side of diagrammatic illustration 28A.Here, the printing member of the present embodiment will be described The structure of part plate 10.As shown in Figure 28 A, the ejection opening forming member 12 of type element plate 10 is equipped with the ink with different colours Corresponding four ejections aperture array.It " is sprayed in addition, the extending direction for spraying the ejection aperture array of opening 13 will be referred to as Aperture array direction ".As shown in Figure 28 B, the printing as the ejection energy generating element for spraying liquid by thermal energy Element 15 is configured in and 13 corresponding positions of each ejection opening.Equipped with type element 15 pressure chamber 23 by partition wall 22 To limit.Type element 15 is connected electrically to terminal 16 by set electric wire (not shown) in type element plate 10.Then, it beats Printing elements 15 based on via electric wiring plate 90 (referring to fig. 2 3) and flexible circuit board 40 (7B referring to fig. 2) from printing device The pulse signal of 1000 control circuit input and in the case where generating heat, make liquid boiling.Foaming power caused by boiling is by liquid It is sprayed from opening 13 is sprayed.As shown in Figure 28 B, liquid supply path 18 extends along each ejection aperture array in side, and Liquid collecting path 19 extends along ejection aperture array in the other side.Liquid supply path 18 and liquid collecting path 19 be Set ejection aperture array direction extends and via supply opening 17a and collection opening 17b and spray in type element plate 10 The flow path of 13 connection of opening out.
As shown in fig. 28 c, sheet cover plate (cover) 20 be laminated to type element plate 10 equipped with spray opening 13 Face the back side on, and cover plate 20 is equipped with the multiple openings being connected to liquid supply path 18 and liquid collecting path 19 21.In the present embodiment, cover plate 20 is received equipped with three openings 21 for each liquid supply path 18 and for each liquid Collect two openings 21 in path 19.As shown in Figure 28 B, the connection that the part (a) of opening 21 and Figure 24 of cover plate 20 illustrates is opened Mouth 51 is connected to.It is expected that cover plate 20 has enough corrosion resistances for liquid.From the point of view of preventing colour mixture, be open 21 opening Shape and aperture position need to have high-precision.Due to this reason, it is expected that using photosensitive resin material or silicon plate as cover plate 20 material forms opening 21 via photoetching process.By this method, cover plate 20 changes the spacing of flow path by opening 21.This In, it is expected that forming cover plate 20 using the thin film member of the thickness in view of the pressure loss.
Figure 29 is to illustrate the section of type element plate 10 and cover plate 20 along the line XXIX-XXIX interception of Figure 28 A Perspective view.Here, the stream of the liquid inside type element plate 10 will be described.Cover plate 20, which is used as, forms 18 He of liquid supply path The lid of a part of the wall of liquid collecting path 19, wherein liquid supply path 18 and liquid collecting path 19 are formed in printing member In the substrate 11 of part plate 10.Pass through the ejection opening forming member for being laminated the substrate 11 formed by silicon and being formed by photosensitive resin 12, type element plate 10 is formed, and cover plate 20 is joined to the back side of substrate 11.The one side of substrate 11 is equipped with type element 15 (8B referring to fig. 2), the back side in the face is equipped with for constituting 18 He of liquid supply path extended along aperture array is sprayed The slot of liquid collecting path 19.The liquid supply path 18 and liquid collecting path 19 formed by substrate 11 and cover plate 20 is distinguished The common feed flow path 211 and shared collection flow path 212 being connected to inside each channel member 210, and in liquid supply path Differential pressure is generated between 18 and liquid collecting path 19.From 13 ejection liquid of opening is sprayed with print image, do not having Have the ejection opening for spraying liquid, the liquid in liquid supply path 18 set by the inside of substrate 11 due to differential pressure and via Supply opening 17a, pressure chamber 23 and collection opening 17b flow to liquid collecting path 19 (9 arrow C referring to fig. 2).By this Stream, liquid collecting path 19 can collect printing without reference to ejection opening 13 or pressure chamber 23 at, by from ejection The evaporation of opening 13 and the ink of foreign matter, bubble and retrogradation generated.Furthermore, it is possible to inhibit to spray in opening 13 or pressure chamber 23 Black retrogradation.Via the opening 21 of cover plate 20 and liquid communication 31 (7B referring to fig. 2) of opening of support member 30, according to flow path portion Connection opening 51 inside part 210, individual collect flow path 214, share the sequence for collecting flow path 212, are collected into liquid to collect The liquid of body collecting path 19.Then, liquid is collected by the collecting path of printing device 1000.That is, from printing Apparatus body is supplied to the liquid of fluid ejection head 3 to be flowed in the following order, to be supplied and be collected.
Firstly, liquid flows in fluid ejection head 3 from the fluid connection 111 of fluid supply unit 220.Then, successively By in connection opening 72 set in connector rubber 100, third channel member and common flow path slot 71, second flow path component The common flow path slot 62 of outfit be connected to individual flow passage groove 52 set in opening 61 and first flow path component be connected to out Mouth 51, to supply liquid.Then, liquid is successively passing through fluid connection opening 31, cover plate set in support member 30 In 20 in set opening 21 and substrate 11 set liquid supply path 18 and supply opening 17a and be supplied to pressure Power room 23.In supplying the liquid to pressure chamber 23, not from the liquid of 13 ejection of opening is sprayed followed by institute in substrate 11 It is set in set opening 21 and support member 30 in the collection opening 17b and liquid collecting path 19, cover plate 20 of setting The fluid connection opening 31 set.Then, liquid is followed by connection opening 51 set in first flow path component and individual flow Set connection is open set in 61 and common flow path slot 62, third channel member 70 in road slot 52, second flow path component Common flow path slot 71 be connected to opening 72 and connector rubber 100 hole.Then, liquid institute from fluid supply unit 220 The fluid connection 111 of setting flows to the outside of fluid ejection head 3.
In the first circulation structure shown in Figure 19, the liquid come is flowed through via vacuum cavitations list from fluid connection 111 Member 230 and be fed into the hole of connector rubber 100.In addition, being collected in the second circulation structure shown in Figure 20 from pressure chamber 23 Liquid pass through the hole of connector rubber 100, and flow to fluid ejection head from fluid connection 111 via vacuum cavitations unit 230 Outside.The whole liquid come are flowed through not via a from an end of the common feed flow path 211 of liquid spray unit 300 Body supply line 213a is supplied to pressure chamber 23.That is, flowing through the liquid come from an end of common feed flow path 211 Fluid supply unit 220 can be flowed to from the other end of common feed flow path 211, without flowing to individual supply line 213a In.By this method, since path is provided so that liquid flows through the path without type element plate 10, because It, can also be with even if this includes in the type element plate 10 with the small flow path of big flow impedance at (as in the present embodiment) Inhibit the adverse current of the recycle stream of liquid.By this method, it is open due to that can inhibit to spray in the fluid ejection head 3 of the present embodiment With the liquid retrogradation near pressure chamber 23, therefore it is able to suppress the sliding of liquid or does not spray.As a result, high-quality can be printed Picture.
(description of the positional relationship between type element plate)
Figure 30 is to illustrate the part amplification vertical view of two adjacent adjacent parts for spraying the type element plate in module.? In the present embodiment, generally parallelogram-shaped type element plate is used.13 configuration of opening is sprayed in each type element plate 10 Ejection aperture array (14a to 14d) is configured as relative to the longitudinal direction of fluid ejection head 3 there is predetermined angular to incline Tiltedly.Then, it is sprayed in a manner of opening is overlapped on print media conveying direction and is formed between type element plate 10 by least one Adjacent part ejection aperture array.In Figure 30, two ejections opening on line D overlaps each other.Using this arrangement, i.e., Make in the case where the position of type element plate 10 is offset slightly from predetermined position, the driving control of opening can also be sprayed by overlapping The black line or missing for making to make print image are rendered less obvious.Even if being configured as linearly in type element plate 10 Shape (series connection shape) rather than in the case where zigzag, black line or the missing at the interconnecting piece between type element plate 10 can also be coped with, Inhibit the increase of length of the fluid ejection head 3 on print media conveying direction by structure shown in Figure 30 simultaneously.In addition, In the present embodiment, the principal plane of type element plate is parallelogram, and but the invention is not restricted to this.For example, even if making In the case where rectangle, trapezoidal and other shapes of type element plate, it may also be desirable to use structure of the invention.
(the 5th embodiment)
Hereinafter, ink jet printing device 2000 and the liquid spray of fifth embodiment according to the present invention will be described with reference to the drawings Lift one's head 2003 structure.In the following description, the difference with fourth embodiment will be only described, and will be omitted and fourth embodiment phase The description of same component.Here, black circulating path identical with the black circulating path of 3rd embodiment is set.With 3rd embodiment It is identical, in the case where being provided with monitor area and controlling black flow based on the pressure loss of each monitor area, liquid can be inhibited The local pressure loss of body ejecting head.
(description of ink jet printing device)
Figure 38 is to illustrate the figure of the ink jet printing device 2000 for spraying liquid according to the present embodiment.The present embodiment Printing device 2000 is different from the first embodiment in, and is printed full-colour image on the print medium using such as flowering structure: Parallel deployment four monochromatic fluid ejection heads 2003 corresponding with the ink of cyan C, magenta M, yellow Y and black K respectively.? It is 1 for the quantity for spraying aperture array workable for a color in fourth embodiment.However, in the 5th embodiment, needle It is 20 to the quantity for spraying aperture array workable for a color.Due to this reason, it is suitably allocated to by print data It, can be with flying print image in the case that multiple ejection aperture arrays are with print image.In addition, even if in the presence of liquid is not sprayed Spray opening, also from be located at and it is non-spray opening on print media conveying direction other arrays of corresponding position ejection Opening addedly sprays liquid.Reliability is improved, therefore can suitably print commercial graphic.It is identical as fourth embodiment, Feed system, buffer 1003 (referring to Figure 19 and Figure 20) and the main memory 1006 of printing device 2000 are (referring to figure 19 and Figure 20) it is fluidly connected to fluid ejection head 2003.In addition, sending electric power to fluid ejection head 2003 and spraying control signal Electric control unit be connected electrically to fluid ejection head 2003.
(description of circulating path)
It is identical as fourth embodiment, the first and second loop structures shown in Figure 19 or 20 can be used, set as printing Liquid circulation structure between standby 2000 and fluid ejection head 2003.
(description of the structure of fluid ejection head)
Figure 31 A and 31B are to illustrate the perspective view of the fluid ejection head 2003 according to the present embodiment.Here, basis will be described The construction of the fluid ejection head 2003 of the present embodiment.Fluid ejection head 2003 is ink-jet row type fluid ejection head, the ink-jet row type Fluid ejection head includes 16 type element plates 2010 being disposed linearly in the longitudinal direction of fluid ejection head 2003, and A kind of liquid print image can be passed through.It is identical with the first embodiment, fluid ejection head 2003 includes fluid connection 111, letter Number input terminal 91 and power supply terminal 92.However, due to compared with fourth embodiment, the fluid ejection head 2003 of the 5th embodiment Including many ejection aperture arrays, therefore signal input terminal 91 and the configuration of power supply terminal 92 are the two of fluid ejection head 2003 Side.It is sent this is because needing to reduce voltage decline or signal caused by wiring part point set in type element plate 2010 Delay.
Figure 32 is the component or unit for illustrating fluid ejection head 2003 and constituting fluid ejection head 2003 according to its function Strabismus decomposition figure.The respective function of unit and component or liquid flow sequence inside fluid ejection head are implemented with the 4th substantially Example is essentially identical, but the function of the rigidity for guaranteeing fluid ejection head is different.In the fourth embodiment, mainly pass through Liquid spray unit support portion 81 guarantees the rigidity of fluid ejection head, but in the fluid ejection head 2003 of the 5th embodiment In, guarantee the rigidity of fluid ejection head 2003 by the second flow path component 2060 for including in liquid spray unit 2300.The The liquid spray unit support portion 81 of five embodiments is connected to two ends of second flow path component 2060, and liquid sprays list Member 2300 is mechanically connected to the balladeur train of printing device 2000, to position fluid ejection head 2003.Electric wiring plate 90 and including negative The fluid supply unit 2220 of pressure control unit 2230 is connected to liquid spray unit support portion 81.Two fluid supply units 2220 respectively include built-in filter (not illustrating).
Two vacuum cavitations units 2230 are arranged to control different by pressure (opposite high negative pressure and opposite lower negative pressure). In addition, being arranged on fluid ejection head in the vacuum cavitations unit 2230 of high-pressure side and low-pressure side as shown in Figure 31 A, 31B and 32 The common feed flow path extended in the case where 2003 two ends along the longitudinal direction of fluid ejection head 2003 and shared collection The stream of liquid in flow path is relative to each other.In this configuration, promoted common feed flow path and shared to collect between flow path Heat exchange, therefore reduce the temperature difference inside two common flow paths.Therefore, the type element plate being arranged along common flow path 2010 temperature difference reduces.As a result, there are following advantages: being not easy to cause printing uneven by temperature difference.
Next, by the detailed construction for the channel member 2210 for describing liquid spray unit 2300.As shown in figure 32, pass through Lamination first flow path component 2050 and second flow path component 2060 obtain channel member 2210, and channel member 2210 will be from The liquid that fluid supply unit 2220 supplies, which is distributed to, sprays module 2200.Channel member 2210 is used as will be from ejection module 2200 The liquid that circulation is come is back to the channel member of fluid supply unit 2220.The second flow path component 2060 of channel member 2210 is It is formed with common feed flow path and shares the rigid channel member collected flow path and improve fluid ejection head 2003.Due to the original Cause, it is expected that the material of second flow path component 2060 with the corrosion resistance having enough and has high mechanical strength for liquid.Specifically SUS, Ti or aluminium oxide can be used in ground.
The part (a) of Figure 33 is the figure for being mounted with to spray the face of module 2200 of illustration first flow path component 2050, and The part (b) of Figure 33 is the back side for illustrating the face and the figure in the face being in contact with second flow path component 2060.Implement with the 4th Example is different, and the first flow path component 2050 of the 5th embodiment has the following structure: adjacently configuration is opposite with ejection module 2200 The multiple components answered.It can be the length with fluid ejection head 2003 by multiple module arrangements by using this separate structure It spends corresponding.Therefore, it is the corresponding phase of the thin slice of B2 or bigger with size which, which can especially be suitably used in for example, To in long fluid ejection head.As shown in the part (a) of Figure 33, connection opening 51 and the ejection module of first flow path component 2050 2200 are in fluid communication.As shown in the part (b) of Figure 33, connection opening 53 and the second flow path component of first flow path component 2050 2060 connection opening 61 is in fluid communication.The part (c) of Figure 33 illustrates second flow path component 2060 relative to first flow path component 2050 contact surface, the part (d) of Figure 33 illustrate second flow path component 2060 in the section of the central part of thickness direction, and The part (e) of Figure 33 is the figure for illustrating second flow path component 2060 relative to the contact surface of fluid supply unit 2220.Second The connection opening and the function of flow path and each color of fourth embodiment of circuit unit 2060 are identical.It is formed as follows second The common flow path slot 71 of circuit unit 2060: the side of common flow path slot 71 is the common feed flow path 2211 that Figure 34 is illustrated, another Side is to share to collect flow path 2212.These flow paths 2211 and 2212 are arranged respectively along the longitudinal direction of fluid ejection head 2003, So that liquid is supplied from an end of fluid ejection head 2003 to the other end.The difference of 5th embodiment and fourth embodiment Place is: common feed flow path 2211 and the direction of liquid flow shared in collection flow path 2212 are opposite each other.
Figure 34 is to illustrate the perspective view of the liquid connection relationship between type element plate 2010 and channel member 2210.In liquid A pair of of the common feed flow path 2211 and shared collection flow path 2212 setting extended in the longitudinal direction of body ejecting head 2003 is flowing Inside circuit unit 2210.The connection opening 61 of second flow path component 2060 is connected to opening 53 with the individual of first flow path component 2050 So that the mode that the two position matches each other is connected.Therefore following liquid supply line is formed, wherein the liquid supply stream Road is from the common feed flow path 2211 of second flow path component 2060 via the connection of connection opening 61 and first flow path component 2050 51 connection of opening.Similarly, following liquid supply path is also formed, wherein the liquid supply path is from second flow path component 2060 connection opening 72 is via shared 51 connection of connection opening for collecting flow path 2212 and first flow path component 2050.
Figure 35 is the sectional view intercepted along the line XXXV-XXXV of Figure 34.Common feed flow path 2211 is open via connection 61, individual connection opening 53 is connected to ejection module 2200 with opening 51 is connected to.Although not illustrated in Figure 35, however, it will be apparent that In the different cross section of Figure 34, collection flow path 2212 is shared via identical path and is connected to ejection module 2200.It is real with the 4th It applies that example is identical, sprays module 2200 and type element plate 2010 is each provided with and each flow path for spraying open communication, therefore institute Some or all of liquid of supply can be recycled by the ejection opening without spraying operation.In addition, implementing with the 4th Example is identical, and common feed flow path 2211 is connected to vacuum cavitations unit 2230 (high-pressure side) via fluid supply unit 2220, and And it shares collection flow path 2212 and is connected to vacuum cavitations unit 2230 (low-pressure side) via fluid supply unit 2220.Therefore, shape It is flowed to via the pressure chamber of type element plate 2010 from common feed flow path 2211 at making liquid due to differential pressure and shares collection The stream of flow path 2212.
(description for spraying module)
Figure 36 A is to illustrate the perspective view that one sprays module 2200 and the exploded view that Figure 36 B is Figure 36 A.It is real with the 4th Apply example the difference is that, terminal 16 be arranged respectively on type element plate 2010 ejection aperture array direction two sides (the long side part of type element plate 2010).Therefore, for each type element plate 2010 configuration electrical connection to type element plate 2010 two flexible circuit boards 40.Since the quantity of ejection aperture array set in type element plate 2010 is 20, Therefore eight ejection aperture arrays that aperture array is more than fourth embodiment are sprayed.Here, due to from terminal 16 to type element Maximum distance shorten, therefore voltage generated in wiring part type element plate 2010 inside decline or signal delay subtract It is small.In addition, the fluid connection opening 31 of support member 2030 is open along entire ejection set in type element plate 2010 Array opening.Other structures are identical as fourth embodiment.
(description of the construction of type element plate)
Figure 37 A is the schematic diagram for illustrating the face configured with ejection opening 13 of type element plate 2010 and Figure 37 C is example The schematic diagram at the back side in the face of diagram 37A.Figure 37 B is illustrated set by the back side of the type element plate 2010 in removal Figure 37 C The schematic diagram in the face of the type element plate 2010 in the case where the cover plate 2020 set.As illustrated in figure 37b, liquid supply path 18 The back side for being disposed alternately at type element plate 2010 along aperture array direction is sprayed with liquid collecting path 19.Spray opening battle array The quantity of column is greater than the quantity of the ejection aperture array of fourth embodiment.However, the basic differences with fourth embodiment exists In: as described above, two sides of the configuration of terminal 16 in the ejection aperture array direction of type element plate 2010.With fourth embodiment phase Same basic structure is, a pair of of liquid supply path 18 and liquid collecting path 19 are arranged in each ejection aperture array, and And cover plate 2020 is equipped with the opening 21 being connected to the fluid connection of support member 2030 opening 31.
In addition, the description of above-described embodiment is not limit the scope of the invention.As an example, in the present embodiment, It describes and bubble is generated to spray the hot mode type of liquid by heating element.However, it may also be possible to apply the invention for using pressure Electric type and various other liquid spray the fluid ejection head of type.
In the present embodiment, it has been described that the spray that the liquid of ink etc. recycles between reservoir and fluid ejection head Black printing device (printing device), but other embodiments also can be used.It in other embodiments, for example, can be using such as Flowering structure: ink does not recycle, and the upstream side and downstream side of fluid ejection head is arranged in two reservoirs, so that ink is stored up from one Storage flows to another reservoir.By this method, the ink inside pressure chamber can flow.
In the present embodiment, it has been described that use length so-called row type head corresponding with the width of print media Example, but it may also be possible to apply the invention for image printing on the print medium so-called in the case where scanning and printing medium Serial type fluid ejection head.As serial type fluid ejection head, for example, fluid ejection head can beating equipped with ejection tusche Printing elements plate and the type element plate for spraying color ink, but the invention is not restricted to this.It is situated between that is, can be set than printing The width of matter is short and fluid ejection head including multiple type element plates, and liquid spray can be scanned relative to print media Lift one's head, wherein the multiple type element plate is configured such that ejection opening overlaps each other on spraying aperture array direction.
(sixth embodiment)
In the topology example of the first to the 5th embodiment, flowed to via pressure chamber 404 from side opening 1401 is flowed into ink In the structure for collecting side opening 1703, with flow into side opening 1401 and collect the respective corresponding monitor area of side opening 1703 For unit, to calculate the pressure loss.In the sixth embodiment, it is open with the ejection of the end side of type element intralamellar part as base Standard, as unit of monitor area corresponding with each division region in type element plate, to calculate the pressure loss.
The description with third to the identical component of the 5th embodiment will be omitted.Even if in the present embodiment, also with third extremely 5th embodiment is identically formed black circulating path.
(the control example of Mo Liuliang)
Figure 39 is illustrated in type element plate 10 equipped with ejection opening 13 The top view in face.In the present embodiment, it is described below the example of printing device, wherein the printing device is using once by coming Continuous print image, and including the page width type fluid ejection head with multiple type element plates.Figure 39, which is illustrated, is located at liquid ejection One type element plate of the end side of head.In Figure 39, the ejection opening in aperture array an end is sprayed at one Position 807a and the other end ejection opening position 807b between it is evenly divided for after region 807 (1) to 807 (6) It is arranged to monitor area.In this case, based on the respective pressure loss of monitor area to control black flow the case where Under (identical as the method for third to the 5th embodiment), can control the local pressure loss in fluid ejection head.
Here, in the present embodiment, set the threshold value of the black flow controlled for each monitor area to and cover plate Gap is maximum between the opening 21 of 2020 (Figure 37 C) and the maximum region of the pressure loss in value.For example, being examined in Figure 39 Type element plate 10 is considered in the case where spraying two ends on opening arrays direction, and monitor area 807 (1) has from covering The opening 21 of cover board to area end longest distance.Since the pressure loss of monitor area 807 (1) becomes maximum, adopt Use the flow of monitor area 807 (1) inside as threshold value.Since threshold value is the institute on the basis of the region that the pressure loss seldom occurs It is arranged, therefore, even if printing the feelings that duty ratio is equal to or less than threshold value in other monitor areas of type element intralamellar part Under condition, printing can also be carried out.
In this case, the threshold value of the printing duty ratio of each monitor area can be arranged to identical in all areas Threshold value, or it is arranged to different threshold values in each region.Additionally, this invention is not limited to this.For example, can change for each array Variable threshold value, and threshold value can be set for each type element plate.
Figure 40 is instantiated with multiple type element plates 10 and with the isostructural page of Figure 30 phase with fourth embodiment Continuous portion between in wide type fluid ejection head, outermost end type element plate 10a and its type element plate 10b of adjoining. As shown in figure 39, the type element plate 10a including the ejection aperture position 807a in end is arranged to be used for dividing monitoring The benchmark in region.In this case, as shown in figure 39, the inside of type element plate 10a (is divided into 6 portions by equalization division Divide 807 (1) to 807 (6)).As described above, type element plate 10 is generally shaped like parallelogram, and spray opening 13 The ejection aperture array 14a to 14d being arranged in type element plate 10a is configured as tilting relative to print media conveying direction Predetermined angular.Then, it is sprayed in a manner of opening is overlapped on print media conveying direction by least one and forms printing member The ejection aperture array of the adjacent part of part plate 10a and 10b.Due to this reason, for example, the ejection of type element plate 10b be open battle array The starting position of monitor area in column 14d is opened relative to the ejection of second nozzle of the interconnecting piece of type element plate 10a Mouth position 807c.Therefore, monitor area is offset for each adjacent type element plate.Therefore, in the present embodiment, have In the page width type fluid ejection head of multiple type element plates, there is also the positions for the opening 21 in monitor area not including cover plate It sets, but the pressure loss is controlled by threshold value identical with other monitor areas.
The fluid ejection head of the present embodiment is not limited to the structure illustrated in Figure 39 and 40.For example, it is identical as second embodiment, Fluid ejection head can only have a type element plate.Then, the present embodiment is readily applicable to this fluid ejection head.This Outside, the quantity for the monitor area for being open or being divided is not limited to the present embodiment.In addition, in the present embodiment, type element plate Principal plane is formed parallelogram, and but the invention is not restricted to this.For example, even if being formed rectangle, trapezoidal in use Or in the case where other shapes of type element plate, it may be desirable to be suitable for the invention structure.In adjacent type element plate Interconnecting piece at, monitor area can not overlap each other on print media conveying direction, and the invention is not limited thereto.
(other embodiments)
Present invention may apply to the ink jet printing devices of various printing types, and printing type includes being sprayed by liquid The relative movement between print media of lifting one's head comes the serial scan type and full row type of print image.
In addition, except through using the inkjet print head for capableing of ink-jet to come except the ink jet printing device of print image, this Invention can also be widely used in the liquid discharge apparatus using the fluid ejection head that can spray various liquid.For example, this hair It is bright can be adapted for printer, duplicator, the facsimile machine with communication system, the word processor with printer and with it is each The Industrial Printing equipment that kind processing unit combines.It is also possible to for manufacturing biochip or printing electronics electricity Road.
While the present invention has been described with reference to the exemplary embodiments, it should be appreciated that, the present invention is not limited to disclosed Exemplary embodiments.The scope of the appended claims meets widest explanation, to include all such modifications, equivalent structure and function Energy.

Claims (12)

1. a kind of liquid discharge apparatus is open from multiple ejections of fluid ejection head and sprays liquid, the liquid discharge apparatus Include:
Feed path, be configured as with the multiple ejection open communication, and to the multiple regions of the fluid ejection head Liquid is supplied,
It is characterized in that, the liquid discharge apparatus further include:
Controller is configured as when based on data are sprayed from fluid ejection head ejection liquid, the multiple region At least one fluid flow to be more than predetermined amount of flow in the case where, control from the liquid per unit time of the fluid ejection head Body spray volume, so that the fluid flow of each region in the multiple region becomes the predetermined amount of flow or is less than described predetermined Flow.
2. liquid discharge apparatus according to claim 1, wherein further include:
Calculator is configured as spraying the ejection data used in liquid based on being open from the multiple ejection, to calculate The fluid flow.
3. liquid discharge apparatus according to claim 1, wherein further include:
Mobile mechanism is configured as the medium phase for being ejected to the fluid ejection head from the fluid ejection head with liquid To movement,
Wherein, the liquid that the controller controls the fluid ejection head sprays the movement speed of frequency and the mobile mechanism.
4. liquid discharge apparatus according to claim 1, wherein
For each region in the multiple region, the feed path is set.
5. liquid discharge apparatus according to claim 1, wherein
The region includes the region with the feed path and the region without the feed path.
6. liquid discharge apparatus according to claim 1, wherein the feed path is with corresponding with the ejection opening Region be unit come branch.
7. liquid discharge apparatus according to claim 1, wherein
The multiple ejection opening is arranged to form multiple ejection aperture arrays, and
The feed path comes branch as unit of region corresponding with each ejection aperture array.
8. liquid discharge apparatus according to claim 1, wherein
The fluid ejection head includes multiple liquid ejection substrate equipped with the ejection opening, and
The feed path comes branch as unit of region corresponding with each liquid ejection substrate.
9. liquid discharge apparatus according to claim 1, wherein
The fluid ejection head include with it is the multiple spray open communication multiple flow paths and with the multiple fluid communication Multiple openings, and
The feed path comes branch as unit of region corresponding with each opening in the multiple opening.
10. liquid discharge apparatus according to claim 1, wherein
The fluid ejection head includes: the ejection energy generating element for spraying liquid；It is generated equipped with the ejection energy The pressure chamber of element；And the collection flow path for collecting liquid from the pressure chamber, and
The liquid discharge apparatus further includes circulator, and the circulator is configured as making liquid via the feed path, institute It states pressure chamber and the collection flow path is recycled.
11. a kind of ink jet printing device comprising liquid discharge apparatus according to claim 1, wherein
The fluid ejection head is that the liquid ink that can make to be supplied via the feed path is sprayed from the multiple ejection opening Inkjet print head out, and
The ink jet printing device includes mobile mechanism, the mobile mechanism be configured as making the inkjet print head with from described The print media relative movement that the ink that inkjet print head sprays is be applied to.
12. a kind of liquid ejection method sprays liquid, the liquid ejection side for being open from multiple ejections of fluid ejection head Method the following steps are included:
It is each into the multiple region via multiple feed paths corresponding with the multiple regions of the fluid ejection head Region supplies liquid, wherein the multiple region and the multiple ejection open communication,
It is characterized in that, the liquid ejection method is further comprising the steps of:
When based on spray data spray liquid from the fluid ejection head when, at least one the multiple region fluid flow In the case where being more than predetermined amount of flow, the liquid spray volume per unit time from the fluid ejection head is controlled, so that described The fluid flow of each region in multiple regions becomes the predetermined amount of flow or is less than the predetermined amount of flow.
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