Liquid jet head and liquid jet recording device

Abstract

The present invention provides a liquid ejection head and the like that can improve convenience. The liquid ejection head involved in one embodiment of the present disclosure comprises: an ejection portion; a plurality of drive substrates; one or more drive devices; a waveform setting portion; a control switching portion; an external control line for performing a first control communication; an internal control line for performing a second control communication; and a plurality of drive control lines for individually performing a third control communication. The waveform setting portion generates second waveform setting information for setting a drive waveform based on first waveform setting information transmitted from the outside of the liquid ejection head using the first control communication. When the second waveform setting information transmitted from the waveform setting portion using the second control communication is transmitted to the drive device using the third control communication, the control switching portion switches control between a transmission control action and a cutoff control action.

Description

Technical Field

[0001] The present disclosure relates to a liquid ejecting head and a liquid ejecting recording apparatus. Background Art

[0002] Liquid jet recording apparatuses including a liquid jet head are used in various fields, and various types of heads have been developed as liquid jet heads (for example, see Patent Documents 1 and 2).

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2017-170652

[0006] Patent document 2: Japanese Patent Application Publication No. 2000-334938. Summary of the invention

[0007] Problems to be solved by the invention

[0008] Generally, such a liquid ejecting head is required to have improved convenience. It is desirable to provide a liquid ejecting head and a liquid ejecting recording apparatus capable of improving convenience.

[0009] Solutions to Solve Problems

[0010] The liquid ejection head involved in one embodiment of the present disclosure comprises: an ejection portion, which ejects liquid; a plurality of drive substrates; one or more drive devices, which are respectively arranged in these plurality of drive substrates, and eject liquid by applying a drive signal having a predetermined drive waveform to the ejection portion; a waveform setting portion, which sets the drive waveform; a control switching portion, which is arranged between the waveform setting portion and the plurality of drive substrates; an external control line, which performs a first control communication between the outside of the liquid ejection head and the waveform setting portion; an internal control line, which performs a second control communication between the waveform setting portion and the control switching portion; and a plurality of drive control lines, which individually perform a third control communication between the control switching portion and the drive devices in each of the plurality of drive substrates. The waveform setting portion generates the second waveform setting information for setting the drive waveform based on the first waveform setting information transmitted from the outside of the liquid ejection head using the first control communication. The control switching section switches control between a transmission control action and a cutoff control action when transmitting the second waveform setting information transmitted from the waveform setting section by the second control communication to the driving device by the third control communication. In the transmission control action, the second waveform setting information is transmitted in parallel to the driving device in at least one driving substrate among the multiple driving substrates by the third control communication on at least one driving control line among the multiple driving control lines. In the cutoff control action, the transmission of the second waveform setting information by the third control communication is used for the cutoff of all the multiple driving control lines.

[0011] A liquid jet recording apparatus according to an embodiment of the present disclosure includes the liquid jet head according to the embodiment of the present disclosure described above.

[0012] Effects of the Invention

[0013] According to the liquid jet head and the liquid jet recording apparatus according to one embodiment of the present disclosure, convenience can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a block diagram showing a schematic configuration example of a liquid jet recording apparatus according to an embodiment of the present disclosure.

[0015] Figure 2 It is schematically shown Figure 1 A perspective view showing an example of a schematic configuration of a liquid ejecting head shown.

[0016] Figure 3 It is schematically shown Figure 2 A cross-sectional view of a structural example of a liquid ejecting head shown.

[0017] Figure 4 It is shown Figures 1 to 3A block diagram showing a detailed configuration example of a liquid ejecting head shown in FIG.

[0018] Figure 5 It is shown Figure 4 The timing diagram of the configuration example of the simplified waveform setting information and the formal waveform setting information shown.

[0019] Fig. 6A It is shown Figure 5 Schematic diagram of a detailed configuration example of the reference potential value shown.

[0020] Figure 6B It is shown Figure 5 Schematic diagram of a detailed configuration example of the power supply potential value shown.

[0021] Figure 7 It is shown Figure 4 A block diagram showing an example of a transport control operation in a liquid ejecting head shown.

[0022] Figure 8 It is shown Figure 4 A block diagram showing an example of a cutoff control operation in a liquid ejecting head shown.

[0023] Fig. 9 1 is a timing chart showing a configuration example of the simplified waveform setting information and the formal waveform setting information according to the first modification.

[0024] Fig. 10A It is shown Fig. 9 Schematic diagram of a detailed configuration example of the reference potential value shown.

[0025] Fig. 10B It is shown Fig. 9 Schematic diagram of a detailed configuration example of the power supply potential value shown.

[0026] Fig.11 This is a block diagram showing a configuration example of a liquid ejecting head according to Modification 2.

[0027] Fig.12 This is a block diagram showing a configuration example of a liquid ejecting head according to Modification 3.

[0028] Fig.13 It is shown Fig.12 A block diagram showing an operation example during direct control communication in a liquid ejecting head shown.

[0029] Fig.14 It is shown Fig.12 1 is a block diagram showing an operation example during indirect control communication in a liquid ejecting head shown.

[0030] Fig.15 It is shown Fig.12A block diagram of another operation example during indirect control communication in the liquid ejecting head shown. DETAILED DESCRIPTION

[0031] Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the drawings. The description will be made in the following order.

[0032] 1. Implementation method (basic configuration example using various waveform setting information and control lines)

[0033] 2. Modifications

[0034] Modification 1 (Modification related to simplified waveform setting information and formal waveform setting information)

[0035] Modification 2 (Example of Further Providing a Waveform Storage Section for Storing Simple Waveform Setting Information)

[0036] Modification 3 (Example of enabling switching between indirect control communication and direct control communication)

[0037] 3. Other variations

[0038] <1. Implementation method>

[0039] [Schematic Structure of Printer 5]

[0040] Figure 1 1 is a block diagram showing a schematic configuration example of a printer 5 as a liquid jet recording apparatus according to an embodiment of the present disclosure. Figure 2 The stereogram schematically shows Figure 1 The illustrated liquid ejecting head is a schematic structural example of an ink jet head 1 . Figure 3 The cross-sectional view (Y-Z cross-sectional view) schematically shows Figure 2 The structure example of the ink jet head 1 shown.

[0041] In addition, in each of the drawings used for the description of this specification, the scale of each member is appropriately changed in order to make each member a recognizable size.

[0042] The printer 5 is a device that uses ink 9, which will be described later, to print on a recording medium (for example, Figure 1 An inkjet printer that records (prints) images or characters, etc., on the recording paper P shown in FIG. Figure 1 As shown, the printer 5 includes an inkjet head 1 , a print control unit 2 , and ink tanks 3 .

[0043] The inkjet head 1 corresponds to a specific example of a “liquid jet head” in the present disclosure, and the printer 5 corresponds to a specific example of a “liquid jet recording device” in the present disclosure. The ink 9 corresponds to a specific example of a “liquid” in the present disclosure.

[0044] (A. Printing control unit 2)

[0045] The printing control unit 2 supplies various information (data) to the inkjet head 1. Specifically, Figure 1 As shown, the print control unit 2 is configured to supply a print control signal Sc to each of the components in the inkjet head 1 (such as a driver device 41 described later).

[0046] The print control signal Sc includes, for example, image data, a discharge timing signal, and a power supply voltage for operating the inkjet head 1. The print control unit 2 corresponds to a specific example of "the outside of the liquid ejecting head" in the present disclosure.

[0047] (B. Ink tank 3)

[0048] The ink tank 3 is a tank that contains ink 9. Figure 1 As shown, the ink 9 in the ink tank 3 is supplied to the inkjet head 1 (the ejection unit 11 described later) via the ink supply tube 30. The ink supply tube 30 is formed of, for example, a flexible hose having flexibility.

[0049] (C. Inkjet head 1)

[0050] like Figure 1 As shown by the dotted arrow in FIG. 1 , the inkjet head 1 is a head for ejecting (discharging) droplet-shaped ink 9 from a plurality of nozzle holes Hn described later onto a recording paper P to record images or characters. Figure 2 , Figure 3 As shown, the inkjet head 1 includes one ejection unit 11 , one I / F (interface) substrate 12 , four flexible substrates 13 a , 13 b , 13 c , and 13 d , and two cooling units 141 , 142 .

[0051] (C-1. I / F substrate 12)

[0052] like Figure 2 , Figure 3 As shown, the I / F board 12 includes two connectors 10, four connectors 120a, 120b, 120c, and 120d, and a circuit arrangement area Ac.

[0053] like Figure 2 As shown, the connector 10 is a portion (connector portion) that inputs the aforementioned printing control signal Sc supplied from the printing control unit 2 to the inkjet head 1 (the respective flexible substrates 13 a , 13 b , 13 c , and 13 d described later).

[0054] The connectors 120 a , 120 b , 120 c , and 120 d are portions (connector portions) that electrically connect the I / F board 12 and the flexible boards 13 a , 13 b , 13 c , and 13 d , respectively.

[0055] The circuit arrangement region Ac is a region where various circuits are arranged on the I / F substrate 12. In addition, such a circuit arrangement region may be provided in other regions on the I / F substrate 12.

[0056] (C-2. Injection unit 11)

[0057] like Figure 1 As shown, the ejection unit 11 is a part having a plurality of nozzle holes Hn and ejecting ink 9 from these nozzle holes Hn. Such ejection of ink 9 is performed according to a drive signal Sd (drive voltage Vd) supplied from a drive device 41 described later on each of the flexible substrates 13a, 13b, 13c, and 13d (see Figure 1 ).

[0058] like Figure 1 As shown, such an ejection unit 11 includes an actuator plate 111 and a nozzle plate 112 .

[0059] (Nozzle plate 112)

[0060] The nozzle plate 112 is a plate made of a film material such as polyimide or a metal material, such as Figure 1 As shown in FIG. 1 , the nozzle holes Hn are provided. The nozzle holes Hn are arranged side by side at predetermined intervals, for example, in a circular shape.

[0061] Specifically, in Figure 2 In the example of the ejection unit 11 shown, a plurality of nozzle rows (four nozzle rows) are arranged along the row direction (X-axis direction) by a plurality of nozzle holes Hn in the nozzle plate 112. In addition, these four nozzle rows are arranged side by side in a direction orthogonal to the row direction (Y-axis direction).

[0062] (Actuator plate 111)

[0063] The actuator plate 111 is a plate made of a piezoelectric material such as PZT (lead zirconate titanate). A plurality of channels (pressure chambers) are provided on the actuator plate 111. These channels are used to apply pressure to the ink 9 and are arranged side by side in parallel with each other at predetermined intervals. Each channel is divided by a driving wall (not shown) made of a piezoelectric body, and becomes a concave groove portion in cross-sectional observation.

[0064] In such channels, there are ejection channels for ejecting ink 9 and dummy channels (non-ejection channels) that do not eject ink 9. In other words, the ejection channels are filled with ink 9, while the dummy channels are not filled with ink 9. In addition, the filling of the ink 9 into each ejection channel is performed, for example, through a flow path (common flow path) that is commonly connected to each ejection channel. In addition, each ejection channel is individually connected to the nozzle hole Hn in the nozzle plate 112, while each dummy channel is not connected to the nozzle hole Hn. These ejection channels and dummy channels are alternately arranged side by side along the aforementioned column direction (X-axis direction).

[0065] In addition, driving electrodes are provided on the opposing inner side surfaces of the driving wall. The driving electrodes include a common electrode (common electrode) provided on the inner side surface facing the ejection channel and an active electrode (individual electrode) provided on the inner side surface facing the dummy channel. These driving electrodes are electrically connected to the driving device 41 described later via the flexible substrates 13a, 13b, 13c, and 13d. Thus, the driving voltage Vd (driving signal Sd) described above is applied from the driving device 41 to each driving electrode via the flexible substrates 13a, 13b, 13c, and 13d (see Figure 1 ).

[0066] (C-3. ​​Flexible substrates 13a, 13b, 13c, 13d)

[0067] like Figure 2 , Figure 3 As shown in FIG. 1 , the flexible substrates 13a, 13b, 13c, and 13d are substrates that electrically connect the I / F substrate 12 and the ejection unit 11. The flexible substrates 13a, 13b, 13c, and 13d control the ejection of the ink 9 in each of the four nozzle columns in the nozzle plate 112. Figure 3 As shown by the reference numerals P1a, P1b, P1c, and P1d in FIG. 1 , each flexible substrate 13a, 13b, 13c, and 13d is bent near the portion where each flexible substrate 13a, 13b, 13c, and 13d is connected to the ejection unit 11 (near the crimping electrode 433). In addition, the crimping electrode 433 and the ejection unit 11 are electrically connected to each other by, for example, thermocompression bonding using ACF (Anisotropic Conductive Film).

[0068] One or more driving devices 41 are mounted on each of the flexible substrates 13a, 13b, 13c, and 13d (see FIG. Figure 3). Each of these drive devices 41 is a device that outputs a drive signal Sd (drive voltage Vd) for ejecting the ink 9 from the nozzle holes Hn in the corresponding nozzle array in the ejection unit 11. In addition, the details of the drive signal Sd will be described later, but it has a predetermined drive waveform. Therefore, such a drive signal Sd is output from each flexible substrate 13a, 13b, 13c, and 13d to the ejection unit 11. In addition, each of such drive devices 41 is composed of, for example, an ASIC (Application Specific Integrated Circuit) or the like.

[0069] In addition, each of these driving devices 41 is cooled by the aforementioned cooling units 141, 142. Specifically, Figure 3 As shown, cooling units 141 are fixedly arranged between the driving devices 41 on the flexible substrates 13a and 13b, and the cooling units 141 are respectively pressed against the driving devices 41, so that each driving device 41 is cooled. Similarly, cooling units 142 are fixedly arranged between the driving devices 41 on the flexible substrates 13c and 13d, and the cooling units 142 are respectively pressed against the driving devices 41, so that each driving device 41 is cooled. In addition, such cooling units 141 and 142 can be respectively constructed using cooling mechanisms of various types.

[0070] [Detailed Structure of Inkjet Head 1]

[0071] Then, except Figures 1 to 3 In addition, refer to Figure 4 , a detailed structural example of the inkjet head 1 is described.

[0072] Figure 4 Shown in block diagram Figures 1 to 3 The detailed structure example of the inkjet head 1 shown in FIG. Figure 4 As shown, the inkjet head 1 includes an external control line Lex, an internal control line Lin, and a plurality of (four in this example) drive control lines Lda to Ldd in addition to the aforementioned I / F substrate 12, flexible substrates 13a to 13d, and ejection unit 11. In addition, the I / F substrate 12 includes a waveform setting unit 121 and a control switching unit 122, and the flexible substrates 13a to 13d each include a plurality of drive devices 41. In addition, the plurality of drive devices 41 in each flexible substrate 13a to 13d are connected in series (cascade connection), for example.

[0073] (Various control lines)

[0074] like Figure 4 As shown, the external control line Lex connects the outside of the inkjet head 1 (printing control unit 2 ) and the waveform setting unit 121 , and is a control line for performing a first control communication C1 described later therebetween.

[0075] like Figure 4 As shown, the internal control line Lin connects the waveform setting unit 121 and the control switching unit 122, and is a control line for performing a second control communication C2 described later therebetween.

[0076] The plurality of drive control lines Lda to Ldd connect the control switch 122 and the drive devices 41 in the plurality of flexible substrates 13a to 13d, and are control lines for individually performing the third control communications C3a to C3d described later between them. Figure 4 As shown, the drive control line Lda connects the control switching section 122 and each drive device 41 in the flexible substrate 13a to perform the third control communication C3a therebetween. Similarly, the drive control line Ldb connects the control switching section 122 and each drive device 41 in the flexible substrate 13b to perform the third control communication C3b therebetween. The drive control line Ldc connects the control switching section 122 and each drive device 41 in the flexible substrate 13c to perform the third control communication C3c therebetween. The drive control line Ldd connects the control switching section 122 and each drive device 41 in the flexible substrate 13d to perform the third control communication C3d therebetween.

[0077] In addition, each of the various control lines (external control line Lex, internal control line Lin, and drive control lines Lda to Ldd) may be a wired control line or a wireless control line.

[0078] (Waveform Setting Section 121)

[0079] The waveform setting unit 121 performs the operation of adjusting the drive signal Sd (see FIG. 1 ) supplied from each drive device 41 to the ejection unit 11. Figure 4 ) driving waveform setting. Specifically, Figure 4 As shown, the waveform setting unit 121 generates the formal waveform setting information Iw2 for setting such a driving waveform based on the simple waveform setting information Iw1 supplied from the outside of the inkjet head 1 (printing control unit 2). In addition, the waveform setting unit 121 converts the simple waveform setting information Iw1 transmitted from the printing control unit 2 by the first control communication C1 into the formal waveform setting information Iw2 by the method described later, thereby generating the formal waveform setting information Iw2 based on the simple waveform setting information Iw1.

[0080] The details of the simplified waveform setting information Iw1 and the formal waveform setting information Iw2 will be described later (see Figure 5 , Fig. 6A , Figure 6B ), but if Figure 4As shown, the data amount Dw1 in the simplified waveform setting information Iw1 is smaller than the data amount Dw2 in the formal waveform setting information Iw2 (Dw1<Dw2).

[0081] In addition, when the waveform setting unit 121 generates the formal waveform setting information Iw2 based on the simplified waveform setting information Iw1 as described above, the details will be described later, but if it is determined that the formal waveform setting information Iw2 has inappropriate content, the following error notification is performed. Specifically, Figure 4 As shown, when the waveform setting unit 121 makes such a determination, it outputs the first error information Ie1 to the print control unit 2 by using the first control communication C1 to perform an error notification.

[0082] Furthermore, the waveform setting unit 121 is configured to also notify the printing control unit 2 of an error message (second error message Ie2) detected in at least one of the driving devices 41 in each of the flexible substrates 13a to 13d. Figure 4 In the example shown, the waveform setting unit 121 collects and stores the second error information Ie2 from the at least one driver device 41 (in this example, one driver device 41 in the flexible substrate 13b) using the third control communication C3b among the third control communications C3a to C3d and the second control communication C2. Furthermore, the waveform setting unit 121 outputs the second error information Ie2 stored in this way to the printing control unit 2 using the first control communication C1, thereby performing error notification.

[0083] Such second error information Ie2 stores various errors related to the driver device 41 (for example, CRC (Cyclic Redundancy Check) transmission error or error related to abnormal waveform setting or abnormal driving action, etc.) and the driver device 41 that detected such error. In addition, in each driver device 41, the second error information Ie2 is detected, for example, by checking when the inkjet head 1 is started or by patrolling every predetermined time.

[0084] (Control switch unit 122)

[0085] like Figure 4 As shown in FIG. 1 , the control switching unit 122 is disposed between the waveform setting unit 121 and the plurality of flexible substrates 13a to 13d. When the formal waveform setting information Iw2 (transmitted from the waveform setting unit 121 using the second control communication C2) is transmitted to the driving device 41 using the third control communication C3a to C3d, the control switching unit 122 performs a predetermined control switching operation. Specifically, the control switching unit 122 performs a control switching operation between the following transmission control operation and the cutoff control operation.

[0086] When the transmission control operation is performed, the formal waveform setting information Iw2 is transmitted in parallel to at least one driving device 41 of the plurality of flexible substrates 13a to 13d by using the third control communication (at least one of the third control communications C3a to C3d) on at least one driving control line among the plurality of driving control lines Lda to Ldd (see the following). Figure 7 ).

[0087] On the other hand, when the cutoff control operation is performed, the transmission of the formal waveform setting information Iw2 by the third control communication C3a to C3d is cut off for all of the plurality of drive control lines Lda to Ldd (see the following description). Figure 8 ).

[0088] Note that the details of the control switching operation between the transmission control operation and the cutoff control operation will be described later.

[0089] [Composition of waveform setting information]

[0090] Then, except Figure 4 In addition, refer to Figure 5 , Fig. 6A , Figure 6B , a configuration example (data configuration example) of the aforementioned various waveform setting information (the simplified waveform setting information Iw1 and the formal waveform setting information Iw2) is described.

[0091] Figure 5 The simplified waveform setting information Iw1 ( Figure 5 (A)) and formal waveform setting information Iw2 ( Figure 5 (B)) is a configuration example. In addition, Figure 5 The horizontal axis in represents time t. In addition, Fig. 6A Schematically shows Figure 5 (A) shows a detailed configuration example of a reference potential value V1 described later. Figure 6B Schematically shows Figure 5 (B) shows a detailed configuration example of a power supply potential value V2 described later.

[0092] (Simple waveform setting information Iw1)

[0093] The simplified waveform setting information Iw1 (first waveform setting information) includes one or more reference potential values ​​V1 set along the time axis. Specifically, Figure 5 As shown in (A), the simplified waveform setting information Iw1 includes VALUE as reference potential value information and LENGTH1 as reference potential period information for each period of each reference potential value V1. Figure 5In the example of (A), VALUE and LENGTH1 are set for each of the periods of timing t10 ​​to t11, t11 to t12, t12 to t13, t13 to t14, t14 to t15, t15 to t16, t16 to t17, t17 to t18, and t18 to t19.

[0094] VALUE arranges arbitrary reference potential values ​​V1 selected and set from one or more reference potential values ​​V1 in parallel along the time axis. Figure 5 (A) Fig. 6A In the example shown, VALUE is shown as a binary value (2 bits), and the corresponding relationship with the three reference potential values ​​V1 is as follows:

[0095] ・VALUE=0b00→ V1=GND(ground potential)

[0096] ・VALUE=0b01→ V1=VP(predetermined positive potential)

[0097] ・VALUE=0b10→ V1=VM(predetermined negative potential)

[0098] LENGTH1 shows the period for each arbitrary reference potential value V1 in VALUE. Figure 5 In the example shown in (A), the number of internal clocks (two digits of hexadecimal value) used in the driver device 41 is shown. Specifically, for example, when the internal clock cycle = 50 [ns], when LENGTH1 = 0x10, it becomes a period of 50 [ns] × 16 = 800 [ns], when LENGTH1 = 0x1E, it becomes a period of 50 [ns] × 30 = 1.5 [μs], and when LENGTH1 = 0x3C, it becomes a period of 50 [ns] × 60 = 3.0 [μs].

[0099] (Formal waveform setting information Iw2)

[0100] The formal waveform setting information Iw2 (second waveform setting information) includes a plurality of power supply potential values ​​V2 set for each reference potential value V1 in the simplified waveform setting information Iw1. Specifically, Figure 5 As shown in (B), the formal waveform setting information Iw2 includes ASW_SEL as power selection information, VSEL as power supply potential value information, and LENGTH2 as power supply potential period information for each period of each power supply potential value V2. Figure 5In the example (B), ASW_SEL, VSEL, and LENGTH2 are set in each of the periods of timing t10 ​​to t11, t11 to t12, t12 to t13, t13 to t14, t14 to t15, t15 to t16, t16 to t17, t17 to t18, and t18 to t19.

[0101] ASW_SEL is set according to each of the arbitrary reference potential values ​​V1 (GND, VP or VM described above) set in the simple waveform setting information Iw1, and is information for selecting one power supply potential value V2 from among a plurality of power supply potential values ​​V2. Figure 5 (B) Figure 6B In the example shown, ASW_SEL is shown in hexadecimal (two-digit) values, and the corresponding relationship with the six power supply potential values ​​V2 is as follows. That is, GND1 / GND2, VP1 / VP2, VM1 / VM2 are set individually for each case where the reference potential value V1 = GND, VP, VM. In addition, in this example, VC = VM2, and a negative potential (second negative potential) is set for VC.

[0102] ・ASW_SEL=0x01→ V2=GND1(1st ground potential)

[0103] ・ASW_SEL=0x02→ V2=GND2(Second ground potential)

[0104] ・ASW_SEL=0x04→ V2=VP1(1st positive potential)

[0105] ・ASW_SEL=0x08→ V2=VP2(second positive potential)

[0106] ・ASW_SEL=0x10→ V2=VM1(1st negative potential)

[0107] ・ASW_SEL=0x20→ V2=VM2(=VC)(Second negative potential)

[0108] VSEL ​​is arranged along the time axis in parallel with a power supply potential value V2 selected by ASW_SEL (refer to Figure 5 (B)).

[0109] LENGTH2 shows the period for each power supply potential value V2 in VSEL. Figure 5 In the example shown in (B), similarly to the case of LENGTH1 described above, the number of internal clocks used in the driver device 41 (two digits of hexadecimal value) is shown. Figure 5 (A) Figure 5In the example shown in (B), the values ​​of LENGTH1 and LENGTH2 are the same as each other.

[0110] Here, the drive waveform in the aforementioned drive signal Sd is set using such VSEL and LENGTH2 etc. included in the formal waveform setting information Iw2. In addition, in the aforementioned waveform setting unit 121, when generating the formal waveform setting information Iw2 based on the simple waveform setting information Iw1, the rule for converting VALUE in the simple waveform setting information Iw1 into ASW_SEL in the formal waveform setting information Iw2 is, for example, as follows.

[0111] (a1) When VALUE=GND, ASW_SEL=GND1 / GND2 is selected; when VALUE=VP, ASW_SEL=VP1 / VP2 is selected; and when VALUE=VM, ASW_SEL=VM1 / VM2 is selected.

[0112] (b1) When the value of VALUE is set, the value selected last time is not selected in ASW_SEL, but another value is selected.

[0113] Here, the above (b1) is described in detail. Figure 5 (A) Figure 5 In the example of (B), when VALUE = 0b00 (V1 = GND), if ASW_SEL = 0x01 (V2 = GND1) last time, ASW_SEL = 0x02 (V2 = GND2) is selected this time. At this time, conversely, if ASW_SEL = 0x02 (V2 = GND2) last time, ASW_SEL = 0x01 (V2 = GND1) is selected this time.

[0114] Similarly, in Figure 5 (A) Figure 5 In the example of (B), when VALUE = 0b01 (V1 = VP), if the previous ASW_SEL = 0x04 (V2 = VP1), then ASW_SEL = 0x08 (V2 = VP2) is selected this time. At this time, conversely, if the previous ASW_SEL = 0x08 (V2 = VP2), then ASW_SEL = 0x04 (V2 = VP1) is selected this time.

[0115] Similarly, in Figure 5 (A) Figure 5In the example of (B), when VALUE = 0b10 (V1 = VM), if the previous ASW_SEL = 0x10 (V2 = VM1), then ASW_SEL = 0x20 (V2 = VM2) is selected this time. At this time, conversely, if the previous ASW_SEL = 0x20 (V2 = VM2), then ASW_SEL = 0x10 (V2 = VM1) is selected this time.

[0116] In this way, Figure 5 (A) Figure 5 In the example of (B), the multiple (two in this example) power supply potential values ​​V2 for each reference potential value V1 are set to alternate in a predetermined order within a predetermined unit period ΔT (in this example, the two power supply potential values ​​V2 are set to alternate alternately). This is to significantly increase the allowable current consumption value per unit period ΔT on each power supply line of each reference potential (GND, VP, VM in this example) (details will be described later). Specifically, for example, in the case of setting two power supply lines of the same potential (each with an allowable current consumption value = 300 [mA]), if the drive waveforms are alternately selected and set for these two power supply lines, the overall allowable current consumption value can be regarded as 600 [mA]. ​​In addition, even if the selection is not alternated in this way, for example, as long as the usage frequency (set frequency) of the two power supply lines is the same within the unit period ΔT, the allowable current consumption can also be significantly increased.

[0117] That is, in such formal waveform setting information Iw2, it can be said that the setting frequencies of the various power supply potential values ​​V2 for each reference potential value V1 within the unit period ΔT are preferably set according to the ratio of the allowable current consumption values ​​on each power supply line corresponding to each power supply potential value V2. Specifically, for example, regarding V2=GND1 / GND2 corresponding to V1=GND, when the ratio of the allowable current consumption values ​​on each corresponding power supply line is GND1:GND2=1:2, the setting frequency of V2=GND1 / GND2 within the unit period ΔT is also preferably GND1:GND2=1:2. In addition, in the above example, the setting frequencies of the various power supply potential values ​​V2 for each reference potential value V1 within the unit period ΔT are equal to each other (preferably the same, that is, 1:1).

[0118] Here, the above-mentioned flexible substrates 13a to 13d correspond to a specific example of the "drive substrate" in the present disclosure. In addition, the first control communication C1 corresponds to a specific example of the "first control communication" in the present disclosure, the second control communication C2 corresponds to a specific example of the "second control communication" in the present disclosure, and the third control communication C3a to C3d correspond to a specific example of the "third control communication" in the present disclosure. In addition, the simple waveform setting information Iw1 corresponds to a specific example of the "first waveform setting information" in the present disclosure, and the formal waveform setting information Iw2 corresponds to a specific example of the "second waveform setting information" in the present disclosure. In addition, the second error information Ie2 corresponds to a specific example of the "error information" in the present disclosure.

[0119] [Actions and functions / effects]

[0120] (A. Basic operation of printer 5)

[0121] In the printer 5, an operation of recording an image or a character or the like on a recording medium (recording paper P or the like) is performed (printing operation) by ejecting ink 9 using the inkjet head 1 as follows. Specifically, in the inkjet head 1 of the present embodiment, an operation of ejecting ink 9 using a shear (sharing) mode is performed as follows.

[0122] First, the driving devices 41 on each of the flexible substrates 13a, 13b, 13c, and 13d apply a driving voltage Vd (driving signal Sd) to the aforementioned driving electrodes (common electrodes and active electrodes) in the actuator plate 111 in the ejection unit 11. Specifically, each driving device 41 applies a driving voltage Vd to each driving electrode disposed on a pair of driving walls that partition the aforementioned ejection channel. As a result, the pair of driving walls are deformed so as to protrude toward the dummy channel side adjacent to the ejection channel.

[0123] At this time, the driving wall is bent and deformed in a V-shape with the middle position in the depth direction of the driving wall as the center. Moreover, through such bending deformation of the driving wall, the discharge channel is deformed as if it is expanded. In this way, the volume of the discharge channel increases through the bending deformation caused by the piezoelectric thickness slip effect on the pair of driving walls. Moreover, as the volume of the discharge channel increases, the ink 9 is guided into the discharge channel.

[0124] Then, the ink 9 guided into the ejection channel in this way becomes a pressure wave and propagates inside the ejection channel. Moreover, at the timing when the pressure wave reaches the nozzle hole Hn of the nozzle plate 112 (or at a timing close thereto), the driving voltage Vd applied to the driving electrode becomes 0 (zero) V. As a result, the driving wall recovers from the above-mentioned bending and deforming state, and the volume of the ejection channel that has been temporarily increased returns to the original state.

[0125] In this way, during the process of the volume of the ejection channel returning to the original state, the pressure inside the ejection channel increases, and the ink 9 in the ejection channel is pressurized. As a result, the ink 9 in the form of droplets is ejected to the outside (toward the recording paper P) through the nozzle hole Hn (see Figure 1 , Figure 2 , Figure 4 In this way, the ink 9 in the inkjet head 1 is ejected (discharged), and as a result, an image or character is recorded on the recording paper P.

[0126] (B. Detailed actions and functions / effects)

[0127] Next, detailed operations, effects, and effects of the inkjet head 1 of this embodiment will be described in comparison with the conventional method.

[0128] (B-1. Regarding the existing waveform setting of the drive signal)

[0129] First, in recent years, the driving waveform of the driving signal driving the ejection unit in the inkjet head has become more complex. Such a complex waveform is used to achieve the following various effects: for example, reducing the driving noise generated during ejection, or correcting the deviation of ejection performance, or improving the printing quality. Specifically, for example, in the aforementioned patent document 1, in order to suppress the deviation of the ejection volume of each nozzle, the voltage of the common driving waveform driving each nozzle is corrected.

[0130] However, although such a method is effective for driving the inkjet head, the setting of the drive waveform itself becomes more complicated. In addition, such a complex drive waveform can produce the expected effect if it is set correctly, but it cannot produce the expected effect if it is set incorrectly. In addition, it may also cause malfunction, failure, or damage of the inkjet head.

[0131] In addition, a method can be cited in which, for example, a readout function of a drive waveform is provided in the inkjet head, and the drive waveform actually set in the inkjet head is compared with the drive waveform that should have been set, so as to detect and correct errors in the drive waveform setting. However, in this method, only the transmission data and the received data related to the waveform setting are compared, and when there is an error in the transmission data itself, there will be no effect. In addition, when the transmission data is a complex waveform setting, the user needs to fully understand the complex waveform setting, which will increase the burden on the user.

[0132] Thus, it can be said that the conventional method regarding the waveform setting of the driving signal suitable for the inkjet head may reduce the performance of the inkjet head or reduce the convenience of the user.

[0133] (B-2. This embodiment)

[0134] Therefore, the inkjet head 1 of the present embodiment has the following configuration and operates as follows. Thus, in the present embodiment, for example, the following operations and effects can be obtained.

[0135] (About control switching action)

[0136] In addition, in the present embodiment, the waveform setting unit 121 generates the formal waveform setting information Iw2 based on the simple waveform setting information Iw1 transmitted from the outside of the inkjet head 1 (printing control unit 2) to the waveform setting unit 121 by the first control communication C1 on the external control line Lex. Then, when the formal waveform setting information Iw2 transmitted from the waveform setting unit 121 to the control switching unit 122 by the second control communication C2 on the internal control line Lin is transmitted from the control switching unit 122 to each drive device 41 by the third control communication C3a to C3d on the plurality of drive control lines Lda to Ldd, the control switching unit 122 performs the control switching operation between the transmission control operation and the cutoff control operation.

[0137] Here, Figure 7 , Figure 8 An example of such a transmission control operation and a block diagram of the interruption control operation are shown respectively.

[0138] First, in Figure 7 In the transmission control operation shown in FIG. 1 , the formal waveform setting information Iw2 is transmitted by using the third control communication (in this example, all the third control communications C3a to C3d) on at least one of the plurality of drive control lines Lda to Ldd (in this example, on all the drive control lines Lda to Ldd). Specifically, the formal waveform setting information Iw2 is transmitted in parallel from the control switching unit 122 to the drive device 41 in at least one of the plurality of flexible substrates 13a to 13d (in this example, on all the flexible substrates 13a to 13d) (see FIG. 1 ). Figure 7 ). Thus, for example, compared with the case where the formal waveform setting information Iw2 is sequentially transmitted to the driving devices 41 in each of the flexible substrates 13a to 13d, the time required to set the driving waveform (setting time) can be shortened to about 1 / 4 at most.

[0139] On the other hand, Figure 8 During the interruption control operation shown in FIG. 1 , the transmission of the formal waveform setting information Iw2 of the third control communication C3a to C3d is interrupted by the control switching unit 122 for all of the plurality of drive control lines Lda to Ldd (see FIG. 1 ). Figure 8 That is, during the cutoff control operation, the formal waveform setting information Iw2 transmitted from the waveform setting unit 121 to the control switching unit 122 is not transmitted to each driving device 41 in all the flexible substrates 13a to 13d.

[0140] Thus, in the present embodiment, the formal waveform setting information Iw2 is transmitted in parallel to at least one of the driving devices 41 on the plurality of flexible substrates 13a to 13d, or the transmission of the formal waveform setting information Iw2 using the third control communication C3a to C3d is interrupted for all of the plurality of drive control lines Lda to Ldd. Thus, various waveform settings in the inkjet head 1 can be easily realized, for example, the same formal waveform setting information Iw2 is supplied in parallel and batchwise to all of the driving devices 41 on the plurality of flexible substrates 13a to 13d (batch waveform setting), or different formal waveform setting information Iw2 is supplied individually to the driving devices 41 on the plurality of flexible substrates 13a to 13d (individual waveform setting). As a result, in the present embodiment, the convenience in the inkjet head 1 can be further improved.

[0141] Furthermore, in the present embodiment, the waveform setting unit 121 collects and stores the second error information Ie2 in at least one driver device 41 by using the third control communication C3a to C3d and the second control communication C2, and such second error information Ie2 is output to the outside of the inkjet head 1 (printing control unit 2) by using the first control communication C1. Thus, the user of the inkjet head 1 does not need to collect the second error information Ie2 for all the driver devices 41 in the inkjet head 1 individually, so that, for example, measures to deal with such errors can be taken quickly. As a result, the convenience of the inkjet head 1 can be further improved.

[0142] (About waveform setting information)

[0143] First, in the present embodiment, based on the simple waveform setting information Iw1 supplied from the outside of the inkjet head 1 (printing control unit 2), the waveform setting unit 121 in the inkjet head 1 generates the formal waveform setting information Iw2 for setting the drive waveform of the drive signal Sd. Specifically, in the waveform setting unit 121, the simple waveform setting information Iw1 including the aforementioned reference potential value V1 is converted into the formal waveform setting information Iw2 including a plurality of power supply potential values ​​V2 set for each reference potential value V1.

[0144] In this way, since the complex waveform setting of the driving signal Sd is realized in the inkjet head 1, it is easy for the user of the inkjet head 1 to realize such complex waveform setting. That is, the user of the inkjet head 1 does not need to set such complex waveform setting by himself before using the inkjet head 1. Therefore, in the present embodiment, by using the driving signal Sd that has completed such complex waveform setting, the performance of the inkjet head 1 can be improved, and the convenience can be improved (for example, the image quality can be improved by using the auxiliary pulse signal for reducing the residual sound, or the consumption current can be reduced, and the printing operation using high-frequency drive can be realized, etc.).

[0145] In addition, in the present embodiment, the setting frequency of the various power supply potential values ​​V2 for each reference potential value V1 within the aforementioned unit period ΔT is set in the formal waveform setting information Iw2 according to the ratio of the allowable current consumption value on each power supply line corresponding to each power supply potential value V2, as described above. Thus, it can be considered that the allowable current consumption value per unit period ΔT on each power supply line for each reference potential (e.g., GND, VP, VM, etc.) is increased. Therefore, for example, even when the inkjet head 1 is driven at a high frequency, the risk of damage to the inkjet head 1 can be reduced. As a result, the performance of the inkjet head 1 can be further improved.

[0146] Moreover, in the present embodiment, the setting frequencies of the various power supply potential values ​​V2 for each reference potential value V1 within the above-mentioned unit period ΔT are equal to each other as described above, and thus become as follows. That is, it can be considered that the allowable current consumption value per unit period ΔT on each power supply line for each reference potential is further increased. Therefore, for example, even in the case of high-frequency driving in the inkjet head 1, the risk of damage to the inkjet head 1 can be further reduced. As a result, the performance of the inkjet head 1 can be further improved.

[0147] Furthermore, in the present embodiment, the various power supply potential values ​​V2 for each reference potential value V1 are set alternately in a predetermined order as described above within the above-mentioned unit period ΔT, so that the following is achieved. That is, it is easy to make the setting frequencies of the various power supply potential values ​​V2 for each reference potential value V1 equal to each other within the unit period ΔT as described above. As a result, the performance of the inkjet head 1 can be improved more simply.

[0148] In addition, in the present embodiment, the simplified waveform setting information Iw1 is configured to include the aforementioned information (VALUE, LENGTH1), and the formal waveform setting information Iw2 is configured to include the aforementioned information (ASW_SEL, VSEL, LENGTH2). Thus, it is easy to realize the driving waveform on the driving signal Sd. That is, it is easier to realize the aforementioned complex waveform setting on the driving signal Sd in the inkjet head 1. As a result, the convenience can be further improved.

[0149] Furthermore, in the present embodiment, when the formal waveform setting information Iw2 is generated based on the simplified waveform setting information Iw1, if it is determined that the formal waveform setting information Iw2 has inappropriate content, an error notification (notification of the first error information Ie1) is made to the outside of the inkjet head 1 (print control unit 2) from the waveform setting unit 121, so that the following is achieved. That is, for example, the risk of damage to the inkjet head 1 or the risk of performance degradation of the inkjet head 1 when the driving waveform of the driving signal Sd is set using the formal waveform setting information Iw2 having inappropriate content can be avoided. As a result, the reliability of the inkjet head 1 can be improved.

[0150] Furthermore, in the present embodiment, since the amount of data Dw1 in the simple waveform setting information Iw1 is smaller than the amount of data Dw2 in the formal waveform setting information Iw2 (Dw1<Dw2), the following is achieved. That is, the amount of data transmitted from the outside of the inkjet head 1 (for example, the upstream circuit such as the printing control unit 2) can be reduced. Therefore, when the complex waveform setting as described above is performed in the drive signal Sd, the power consumption caused by data transmission can be reduced, and the performance of the inkjet head 1 can be further improved. In addition, since the data transmission time is shortened, for example, the setting time from the upstream circuit to the inkjet head 1 is also shortened. Therefore, during the period when the inkjet head 1 itself performs the complex waveform setting as described above, other settings can be performed by the upstream circuit or software, so that, for example, the startup time of the printer 5 as a whole can be shortened. As a result, the convenience can be further improved. Furthermore, since the amount of data Dw1 in the simple waveform setting information Iw1 is relatively small, the capacity of the memory required in the inkjet head 1 can be reduced.

[0151] <2. Modifications>

[0152] Next, modifications (modifications 1 to 3) of the above-described embodiment will be described. In addition, in the following, the same reference numerals are given to the same components as those in the embodiment, and the description thereof will be appropriately omitted.

[0153] [Variant 1]

[0154] (constitute)

[0155] Fig. 9 The simplified waveform setting information Iw1 ( Fig. 9 (A)) and formal waveform setting information Iw2 ( Fig. 9 (B)) is a configuration example. In addition, Fig. 9 The horizontal axis in represents time t. In addition, Fig. 10A Schematically shows Fig. 9 (A) shows a detailed configuration example of the reference potential value V1. Fig. 10B Schematically shows Fig. 9 (B) is a detailed configuration example of the power supply potential value V2.

[0156] The inkjet head of Modification 1 corresponds to a specific example of the “liquid jet head” in the present disclosure. The printer including the inkjet head of Modification 1 corresponds to a specific example of the “liquid jet recording device” in the present disclosure.

[0157] In the waveform setting information applicable to this modification example 1, Fig. 9 The simplified waveform setting information Iw1 shown in (A) becomes Figure 5 (A) shows the same information as the embodiment, but Fig. 9 (B) The formal waveform setting information Iw2 and Figure 5 The situation of the embodiment shown in (B) is different.

[0158] Specifically, the formal waveform setting information Iw2 of the modification example 1 is obtained by adding information (intermediate potential value information V3) indicating VPH as an intermediate potential value described below to the formal waveform setting information Iw2 of the embodiment (see Fig. 9 (B)). In detail, Fig. 9 In the example shown in (B), during the period of timing t11 to t12 (the period of timing t11 to t21), during the period of timing t12 to t13 (the period of timing t12 to t22), during the period of timing t13 to t14 (the period of timing t13 to t23), during the period of timing t14 to t15 (the period of timing t14 to t24), during the period of timing t15 to t16 (the period of timing t15 to t25), and during the period of timing t16 to t17 (the period of timing t16 to t26), such intermediate potential value information V3 is additionally set between the power supply potential values ​​V2 along the time axis.

[0159] On the other hand, similarly to the simplified waveform setting information Iw1 of the embodiment, the simplified waveform setting information Iw1 of the modification example 1 does not include such intermediate potential value information V3 (see Fig. 9 (A)).

[0160] Here, Fig. 10A The example of the correspondence between VALUE in the simple waveform setting information Iw1 and the reference potential value V1 is shown in FIG. Fig. 6A The same is true for the embodiment shown. On the other hand, Fig. 10B The corresponding relationship example between ASW_SEL and the power supply potential value V2 in the formal waveform setting information Iw2 is also basically the same as Figure 6B The embodiment shown is the same, but in this Fig. 10BIn the example, when ASW_SEL=0x20, VC=VPH is set.

[0161] The above-mentioned intermediate potential value VPH (VSEL=VPH) is a potential value between the minimum value (GND1 / GND2) and the maximum value (VP1 / VP2) of the power supply potential value V2 set in the drive waveform of the drive signal Sd. Fig. 9 In the example shown in (B), VPH is set to be (maximum value) × 0.5. However, the value of VPH is not limited to this example (maximum value × 0.5), and any potential value between the minimum value and the maximum value may be used.

[0162] In addition, such a VPH is set as Fig. 9 When the step-shaped driving waveform (the rise or fall of the waveform, etc.) shown in (B) is used, the rising stage or the falling stage is set to a short period. Specifically, in the rising stage or the falling stage, it is set to pass through VPH. As a result, the power consumption (for the driving current of the ejection unit 11 as the load capacitor) when setting such a step-shaped driving waveform can be reduced (details will be described later).

[0163] Here, in the waveform setting unit 121 of this modification example 1, the rule for converting VALUE in the simple waveform setting information Iw1 to ASW_SEL in the formal waveform setting information Iw2 is basically the same as that in the above-mentioned embodiment, and is, for example, as follows.

[0164] (a2) When VALUE=GND, the setting of ASW_SEL=GND1 / GND2 is selected; when VALUE=VP, the setting of ASW_SEL=VP1 / VP2 is selected; when VALUE=VM, the setting of ASW_SEL=VM1 is selected.

[0165] (b2) When the value of VALUE is set, ASW_SEL does not select the value selected last time, but selects another value (same as the above-mentioned (b1)).

[0166] (c2) When the voltage rises from (GND1 / GND2) to (VP1 / VP2), the value of LENGTH2 during the period of (VP1 / VP2) is reduced (for example, by about 0x08 corresponding to 0.4 [μs]), and the value of LENGTH2 during the period of VPH is set to the reduced value (see Fig. 9 (B)).

[0167] (d2) When the voltage drops from (VP1 / VP2) to (GND1 / GND2), the value of LENGTH2 during the period of (GND1 / GND2) is reduced (for example, by about 0x08 corresponding to 0.4 [μs]), and the value of LENGTH2 during the period of VPH is set to the reduced value (see Fig. 9 (B)).

[0168] In addition, in this modification example 1, similarly to the embodiment, when the formal waveform setting information Iw2 is generated based on the simplified waveform setting information Iw1, if it is determined that the formal waveform setting information Iw2 has inappropriate content, the waveform setting unit 121 notifies the print control unit 2 of the first error information Ie1. Specifically, in this modification example 1, for example, during the setting period of the VPH described above (see Fig. 9 The length of the period ΔtPH shown in (B) becomes longer than the original setting period of (VP1 / VP2) or (GND1 / GND2) (refer to Fig. 9 In the case of the content (ΔtPH≥ΔtP) such as the length of the period ΔtP shown in (B), the formal waveform setting information Iw2 is determined to be inappropriate. This is because if (ΔtPH≥ΔtP), the period (VP1 / VP2) or (GND1 / GND2) will disappear when the setting period of VPH is added, and an inappropriate driving waveform will be obtained. In addition, information indicating the length of such a setting period of VPH is stored in, for example, the waveform setting unit 121 or the waveform storage unit 123.

[0169] (Function / Effect)

[0170] Thus, in the first modification, the intermediate potential value information V3 is set in addition to the formal waveform setting information Iw2 and is not included in the simplified waveform setting information Iw1, so that the following is achieved. That is, by suppressing the data amount Dw1 in the simplified waveform setting information Iw1 and using such intermediate potential value information V3 to set the driving waveform of the driving signal Sd, it is possible to reduce the time required to set the driving waveform of the driving signal Sd, for example. Fig. 9 (B) shows power consumption when a step-shaped driving waveform (rising or falling of the waveform, etc.) is used. As a result, it is possible to easily reduce power consumption of the entire inkjet head according to Modification 1 in the inkjet head.

[0171] [Variant 2]

[0172] (constitute)

[0173] Fig.11 The configuration example of the liquid ejecting head (ink jet head 1B) according to the second modification is shown in a block diagram. The ink jet head 1B of the second modification corresponds to the liquid ejecting head (ink jet head 1B) in the embodiment of the present invention. Figure 4The inkjet head 1 of the illustrated embodiment is an inkjet head in which an I / F substrate 12B is provided instead of the I / F substrate 12, and the other structures are the same.

[0174] The inkjet head 1B corresponds to a specific example of the “liquid jet head” in the present disclosure. The printer including the inkjet head 1B corresponds to a specific example of the “liquid jet recording device” in the present disclosure.

[0175] The I / F substrate 12B corresponds to the I / F substrate 12 in which a waveform storage unit 123 is further provided, and the other structures are the same.

[0176] like Fig.11 As shown, the waveform storage unit 123 stores the simple waveform setting information Iw1 transmitted from the outside of the inkjet head 1B (printing control unit 2) by the first control communication C1. In addition, based on the simple waveform setting information Iw1 stored in the waveform storage unit 123, the waveform setting unit 121 generates the formal waveform setting information Iw2 (see Fig.11 ). Moreover, when the aforementioned transmission control action is performed by using the control switching unit 122, the formal waveform setting information Iw2 generated by the waveform setting unit 121 is transmitted from the waveform setting unit 121 to each driving device 41 via the control switching unit 122 using the third control communication C3a~C3d.

[0177] (Function / Effect)

[0178] Thus, in the second modification, the simple waveform setting information Iw1 transmitted from the outside of the inkjet head 1B (print control unit 2) by the first control communication C1 is stored in the waveform storage unit 123, and based on the stored simple waveform setting information Iw1, the formal waveform setting information Iw2 is generated by the waveform setting unit 121. Then, when the transmission control operation is performed by the control switching unit 122, the formal waveform setting information Iw2 is transmitted to the driving device 41 by the third control communications C3a to C3d.

[0179] Thus, for the user of the inkjet head 1B, only by storing the simple waveform setting information Iw1 in the waveform storage unit 123, the formal waveform setting information Iw2 is generated in the inkjet head 1B and supplied to the driving device 41. In addition, by such a configuration, for example, the formal waveform setting information Iw2 can be prepared on the basis of correcting the erroneous waveform setting included in the simple waveform setting information Iw1. Therefore, the waveform setting in the inkjet head 1B can be realized more easily, and the accuracy of the waveform setting can be improved. As a result, the convenience of the inkjet head 1B can be further improved, and the performance of the inkjet head 1B can be improved.

[0180] [Variant 3]

[0181] (constitute)

[0182] Fig.12 A configuration example of a liquid ejecting head (ink jet head 1C) according to Modification 3 is shown in a block diagram. Fig.13 An example of the operation of the inkjet head 1C when performing direct control communication described later is shown in a block diagram. Fig.14 , Fig.15 Each of the block diagrams shows an operation example during indirect control communication described later in the ink jet head 1C.

[0183] The inkjet head 1C of the modification 3 corresponds to Fig.11 The inkjet head 1B of the second modification shown is an inkjet head in which an I / F substrate 12C and flexible substrates 13Ca to 13Cd are provided instead of the I / F substrate 12B and the flexible substrates 13a to 13d, respectively, and the other structures are the same.

[0184] The I / F substrate 12C corresponds to the I / F substrate 12B in which the first line switching section 124a and the second line switching section 124b are further provided, and the internal control line Lin is composed of the first internal control line Lin1 and the second internal control line Lin2. The other structures are the same.

[0185] Here, the inkjet head 1C corresponds to a specific example of the "liquid jet head" in the present disclosure. In addition, a printer equipped with the inkjet head 1C corresponds to a specific example of the "liquid jet recording device" in the present disclosure. In addition, the above-mentioned first line switching unit 124a and the second line switching unit 124b respectively correspond to a specific example of the "line switching unit" in the present disclosure. In addition, the first line switching unit 124a corresponds to a specific example of the "first line switching unit" in the present disclosure, and the second line switching unit 124b corresponds to a specific example of the "second line switching unit" in the present disclosure. In addition, the above-mentioned first internal control line Lin1 corresponds to a specific example of the "first internal control line" in the present disclosure, and the above-mentioned second internal control line Lin2 corresponds to a specific example of the "second internal control line" in the present disclosure.

[0186] In addition, the flexible substrates 13Ca to 13Cd correspond to the flexible substrates 13a to 13d described so far, respectively, in which a drive information storage unit 42 is further provided, and the other structures are the same (refer to Figures 12 to 15 ).

[0187] The drive information storage unit 42 is provided on each of the drive control lines Lda to Ldd, and stores drive information Id including drive conditions (e.g., various appropriate drive conditions for improving ejection performance) on the corresponding flexible substrates 13Ca to 13Cd. Such drive information Id includes, for example, information related to the drive of each nozzle column in the ejection unit 11 connected to each of the flexible substrates 13Ca to 13Cd, or voltage information (rank voltage) used to suppress the ejection performance deviation between such nozzle columns. In addition, the drive information Id may include individual identification information of the nozzle column itself, information on performance data of the inkjet head 1C at the time of shipment, or information on the accumulated start-up time of the inkjet head 1C. When the drive information Id also includes such information, even when the I / F substrate 12C is replaced, such information related to the ejection unit 11 can be inherited as it is.

[0188] like Fig.12 As shown in FIG. 1 , the first internal control line Lin1 is arranged between the waveform setting section 121 and the first line switching section 124a. Fig.12 As shown, the second internal control line Lin2 is arranged between the first line switching section 124 a and the second line switching section 124 b , the control switching section 122 , and the waveform storage section 123 .

[0189] The first line switching unit 124a and the second line switching unit 124b are respectively configured to selectively perform indirect control communication (see Fig.14 , Fig.15 ) and direct control communication (refer to Fig.13 ) is a part (line switching unit) that switches the connection of the control line in one of the following ways. Specifically, the first line switching unit 124a is selectively connected when performing indirect control communication (refer to Fig.14 , Fig.15 ), the second line switching unit 124b is selectively connected when performing direct control communication (refer to Fig.13 ).

[0190] In addition, such selective connection control is performed by the selection signals SEL1 and SEL2 outputted from the waveform setting section 121 to the first line switching section 124a and the second line switching section 124b, respectively (see Figures 12 to 15 Specifically, when indirect control communication is performed, the waveform setting unit 121 is set to the selection signal SEL1 = "H (high)" state and the selection signal SEL2 = "L (low)" state, so that the first line switching unit 124a is set to the connection state (valid state) and the second line switching unit 124b is set to the non-connection state (invalid state) (refer to Fig.14 , Fig.15On the other hand, when direct control communication is performed, the waveform setting unit 121 is set to the selection signal SEL1 = "L" state and the selection signal SEL2 = "H" state, so that the first line switching unit 124a is set to the non-connected state (invalid state) and the second line switching unit 124b is set to the connected state (valid state) (refer to Fig.13 ).

[0191] Here, for example Fig.13 As shown in FIG. 1 , direct control communication refers to control communication between the outside of the inkjet head 1C (printing control unit 2) and the control switching unit 122 without passing through the waveform setting unit 121. When performing this direct control communication, as described above, the second line switching unit 124b is selectively connected, so that the printing control unit 2 is directly connected to the control switching unit 122 and the waveform storage unit 123 (without passing through the waveform setting unit 121) via the external control line Lex, the second line switching unit 124b and the second internal control line Lin2 (see FIG. 1 ). Fig.13 ). Thus, for example, Fig.13 As shown in , when the waveform setting in the inkjet head 1C is performed, the simple waveform setting information Iw1 can be directly supplied from the printing control unit 2 (not via the waveform setting unit 121) to the waveform storage unit 123. In addition, when such direct control communication is performed, the control switching unit 122 performs the above-mentioned cutoff control operation, thereby cutting off the connection between the external control line Lex and each drive control line Lda to Ldd (refer to Fig.13 "×" mark shown in the figure).

[0192] On the other hand, for example Fig.14 , Fig.15 As shown in FIG. 1 , the indirect control communication refers to the control communication between the outside (printing control unit 2) of the inkjet head 1C and the control switching unit 122 via the waveform setting unit 121. When the indirect control communication is performed, as described above, the first line switching unit 124a is selectively connected, thereby indirectly connecting the printing control unit 2 with the control switching unit 122 and the waveform storage unit 123 (via the waveform setting unit 121) via the external control line Lex, the waveform setting unit 121, the first internal control line Lin1, the first line switching unit 124a, and the second internal control line Lin2 (see FIG. 1 ). Fig.14 , Fig.15 ). Thus, for example, Fig.14As shown in FIG. 1 , when the waveform setting in the inkjet head 1C is performed, the simple waveform setting information Iw1 stored in the waveform storage section 123 is supplied to the waveform setting section 121 via the second internal control line Lin2, the first line switching section 124a, and the first internal control line Lin1. In addition, the formal waveform setting information Iw2 generated in the waveform setting section 121 is supplied to the control switching section 122 (see FIG. 1 ) via the first internal control line Lin1, the first line switching section 124a, and the second internal control line Lin2. Fig.14 ). Furthermore, the control switching unit 122 transmits the received formal waveform setting information Iw2 to the driving device 41 in each flexible substrate 13Ca~13Cd using the third control communication C3a~C3d by executing the aforementioned transmission control action (refer to Fig.14 ).

[0193] In addition, for example, Fig.15 As shown in FIG. 1 , when performing the indirect control communication, in addition to the aforementioned various error information (the first error information Ie1 and the second error information Ie2), the waveform setting unit 121 also outputs the aforementioned drive information Id to the outside of the inkjet head 1C (the printing control unit 2). Specifically, the waveform setting unit 121 first collects and stores the drive information Id from the aforementioned drive information storage unit 42 on each drive control line Lda to Ldd using the third control communication C3a to C3d and the second control communication C2 (see FIG. 1 ). Fig.15 Then, the waveform setting unit 121 outputs the driving information Id stored in this way to the printing control unit 2 (see Fig.15 ).

[0194] (Function / Effect)

[0195] Thus, in the inkjet head 1C of the third modification, the connection switching of the line switching section (the first line switching section 124a and the second line switching section 124b) is performed in a manner of performing one of the above-mentioned indirect control communication and direct control communication, so that it becomes as follows. That is, direct control communication without passing through the waveform setting section 121 can be performed as needed, so, for example, when performing waveform setting in the inkjet head 1C, the simple waveform setting information Iw1 can be directly supplied to the waveform storage section 123 from the outside of the inkjet head 1C (printing control section 2). Thus, unlike the case of using indirect control communication via the waveform setting section 121, processing delay in the waveform setting section 121 can be avoided, so that the waveform setting in the inkjet head 1C can be performed quickly. As a result, the convenience of the inkjet head 1C can be further improved.

[0196] Here, if the processing delay in the waveform setting unit 121 is described in detail, it is as follows. That is, first, when the simple waveform setting information Iw1 is read and written to the waveform storage unit 123, the waveform setting unit 121 needs to determine, for example, whether it is a control communication to the waveform storage unit 123, and only when it is a control communication that meets the requirements, the waveform storage unit 123 is controlled by the internal control line Lin. In the case where the distribution processing of such control communication is performed by the waveform setting unit 121, the distribution processing and the control communication to the waveform storage unit 123 occur after the control communication from the printing control unit 2 to the waveform setting unit 121. Then, during this period, the printing control unit 2 will not be able to perform the next control communication, and a waiting time will occur. As a result, when the drive waveform setting is performed using a large number of control communications, such a waiting time frequently occurs, and the time for performing the drive waveform setting will be significantly increased.

[0197] In addition, in this modification 3, the above-mentioned line switching section is composed of the first line switching section 124a and the second line switching section 124b, and the internal control line Lin is composed of the first internal control line Lin1 and the second internal control line Lin2, so as to be as follows. That is, when the above-mentioned indirect control communication and direct control communication are performed, only one of the first line switching section 124a and the second line switching section 124b is selectively connected. Therefore, it is possible to prevent the control from the outside (printing control section 2) of the inkjet head 1C (control using direct control communication) and the control from the waveform setting section 121 (control using indirect control communication) from being generated simultaneously to the waveform storage section 123 or the control switching section 122. As a result, it is easy to realize the rapid waveform setting in the inkjet head 1C as described above, and as a result, the convenience can be further improved in the inkjet head 1C.

[0198] Furthermore, in this modification 3, when direct control communication is performed, the control switching unit 122 performs a cutoff control action, thereby cutting off the connection between the external control line Lex and the plurality of drive control lines Lda to Ldd, so that the following is achieved. That is, it becomes a state where only the waveform setting unit 121 and the waveform storage unit 123 in the inkjet head 1C can be recognized from the outside of the inkjet head 1C (for example, the upstream circuit of the printing control unit 2, etc.), so it is possible to prevent, for example, erroneous waveform setting of the drive device 41 from being performed from the outside of the inkjet head 1C. As a result, the convenience of the inkjet head 1C can be further improved, and at the same time, the performance of the inkjet head 1C can be prevented from being degraded due to the erroneous waveform setting as described above.

[0199] Furthermore, in this modification 3, the waveform setting unit 121 collects and stores the driving information Id stored in the driving information storage unit 42 by using the third control communication C3a to C3d and the second control communication C2, and outputs such driving information Id to the outside of the inkjet head 1C (printing control unit 2) by using the first control communication C1. As a result, the driving information Id including the above-mentioned driving conditions on each flexible substrate 13a to 13d can be easily obtained, and the user of the inkjet head 1C does not need to collect the driving information Id individually. As a result, the convenience of the inkjet head 1C can be further improved.

[0200] <3. Other variations>

[0201] As mentioned above, although some embodiments and modification examples were given to explain the present disclosure, the present disclosure is not limited to these embodiments and the like, and various modifications can be made.

[0202] For example, in the above-mentioned embodiments, although specific examples of the configuration (shape, configuration, number, etc.) of each component on the printer and the inkjet head are given for description, the configuration is not limited to the above-mentioned embodiments, and other shapes, configurations, numbers, etc. may also be used.

[0203] Specifically, for example, in the above-mentioned embodiments, although examples of the configurations of the I / F substrate, the flexible substrate (drive substrate), the drive device, the various control lines, and the line switching unit are specifically described, these configuration examples are not limited to the configurations described in the above-mentioned embodiments. For example, in the above-mentioned embodiments, although examples are given of the case where the "drive substrate" in the present disclosure is a flexible substrate, the "drive substrate" in the present disclosure may also be a non-flexible substrate, for example. In addition, in the above-mentioned embodiments, as an example of the "line switching unit" in the present disclosure, a case where it is composed of two line switching units (the first line switching unit 124a and the second line switching unit 124b) is described, but the "line switching unit" in the present disclosure may also be realized by other configurations.

[0204] Furthermore, the numerical examples of various parameters described in the above-mentioned embodiments are not limited to the numerical examples described in the embodiments, but may be other numerical values. In addition, the data configuration examples of the waveform setting information (the simplified waveform setting information Iw1 and the formal waveform setting information Iw2) described in the above-mentioned embodiments are not limited to the examples described in the above-mentioned embodiments, but may be other data configurations.

[0205] Furthermore, the control switching actions (transmission control actions and truncation control actions), or the various actions of indirect control communication and direct control communication, the generation action of waveform setting information (formal waveform setting information Iw2), the notification action of various error information, etc. described in the above-mentioned embodiments, etc. are not limited to the action examples described in the above-mentioned embodiments, etc., and may also be other action examples.

[0206] In addition, various types of inkjet heads can be used as the structure of the inkjet head. That is, for example, it can also be a so-called side-jet type inkjet head that spits out ink 9 from the central part of the extension direction of each ejection channel in the actuator plate 111. Or, for example, it can also be a so-called edge-jet type inkjet head that spits out ink 9 along the extension direction of each ejection channel. Furthermore, as a printer method, it is not limited to the methods described in the above-mentioned embodiments, etc., for example, various methods such as MEMS (Micro Electro Mechanical Systems) methods can be applied.

[0207] Furthermore, for example, the present disclosure can be applied to either a circulation-type inkjet head that circulates the ink 9 between the ink tank and the inkjet head or a non-circulation-type inkjet head that does not circulate the ink 9 .

[0208] In addition, the series of processing described in the above embodiments and the like can be performed by hardware (circuit) or by software (program). When performed by software, the software is composed of a group of programs for causing a computer to execute various functions. Each program can be pre-installed in the above computer for use, or can be installed in the above computer from a network or a recording medium for use.

[0209] Furthermore, in the above-mentioned embodiments, a printer (inkjet printer) is cited as a specific example of the "liquid jet recording device" in the present disclosure for description, but the present disclosure is not limited to this example, and other devices other than inkjet printers can also be applied to the present disclosure. In other words, the "liquid jet head" (inkjet head) of the present disclosure can also be applied to other devices other than inkjet printers. Specifically, for example, the "liquid jet head" of the present disclosure can also be applied to devices such as facsimile machines or on-demand printers.

[0210] Furthermore, various examples described above may be arbitrarily combined and applied.

[0211] In addition, the effects described in this specification are ultimately exemplary and are not limited to these, and other effects may also be achieved.

[0212] In addition, the present disclosure may also take the following configurations.

[0213] (1) A liquid ejecting head for ejecting liquid, comprising:

[0214] A spraying portion spraying the liquid;

[0215] A plurality of drive substrates;

[0216] One or more driving devices are respectively arranged in the plurality of driving substrates, and eject the liquid by applying a driving signal having a predetermined driving waveform to the ejection portion;

[0217] A waveform setting unit for setting the driving waveform;

[0218] A control switching unit, arranged between the waveform setting unit and the plurality of drive substrates;

[0219] an external control line for performing a first control communication between the outside of the liquid ejecting head and the waveform setting section;

[0220] an internal control line for performing a second control communication between the waveform setting unit and the control switching unit; and

[0221] a plurality of drive control lines for individually performing third control communication between the control switching section and the drive device in each of the plurality of drive substrates;

[0222] The waveform setting section generates second waveform setting information for setting the driving waveform based on first waveform setting information transmitted from outside the liquid ejecting head by the first control communication.

[0223] The control switching unit,

[0224] When the second waveform setting information transmitted from the waveform setting unit by the second control communication is transmitted to the driving device by the third control communication,

[0225] Perform control switching between transmission control action and truncation control action,

[0226] In the transmission control operation, the second waveform setting information is transmitted in parallel to the driving device in at least one driving substrate among the plurality of driving substrates by using the third control communication on at least one driving control line among the plurality of driving control lines.

[0227] In the cutoff control operation, the cutoff of all of the plurality of drive control lines utilizes the transmission of the second waveform setting information by the third control communication.

[0228] (2) The liquid ejecting head according to (1) above, further comprising:

[0229] a waveform storage unit for storing the first waveform setting information transmitted from the outside of the liquid ejecting head by the first control communication,

[0230] The waveform setting unit,

[0231] The second waveform setting information is generated based on the first waveform setting information stored in the waveform storage unit, and

[0232] When the transmission control operation is performed by the control switching unit, the second waveform setting information is transmitted to the driving device by using the third control communication.

[0233] (3) The liquid ejecting head according to (2) above, further comprising:

[0234] a line switching unit for switching the connection of the control line in a manner of performing one of indirect control communication and direct control communication,

[0235] The indirect control communication is control communication between the outside of the liquid ejecting head and the control switching section via the waveform setting section.

[0236] The direct control communication is control communication between the outside of the liquid ejecting head and the control switching section without passing through the waveform setting section.

[0237] (4) The liquid ejecting head according to (3) above,

[0238] The line switching unit is configured to include:

[0239] a first line switching unit that is selectively connected when the indirect control communication is performed; and

[0240] The second line switching unit is selectively connected when the direct control communication is performed, and

[0241] The internal control line is composed of:

[0242] a first internal control line disposed between the waveform setting section and the first line switching section; and

[0243] The second internal control line is arranged between the first and second line switching section and the control switching section.

[0244] (5) The liquid ejecting head according to (3) or (4) above,

[0245] The control switching unit,

[0246] When the direct control communication is performed, the connection between the external control line and the plurality of drive control lines is cut off by executing the cutoff control action.

[0247] (6) The liquid ejecting head according to any one of (1) to (5) above,

[0248] The waveform setting unit,

[0249] using the third control communication and the second control communication to collect and store error information from the at least one drive device, and,

[0250] outputting the error information to the outside of the liquid ejecting head by using the first control communication,

[0251] The error information is related to an error detected in at least one driving device among the driving devices of the plurality of driving substrates, and corresponds to the driving device in which the error is detected.

[0252] (7) The liquid ejecting head according to any one of (1) to (6) above,

[0253] Each of the plurality of drive control lines further includes a drive information storage unit for storing drive information, wherein the drive information includes a drive condition on the corresponding drive substrate.

[0254] The waveform setting unit collects and stores the drive information from the drive information storage unit on each of the plurality of drive control lines by using the third control communication and the second control communication, and

[0255] The driving information is output to the outside of the liquid ejecting head by the first control communication.

[0256] (8) The liquid ejecting head according to any one of (1) to (7) above,

[0257] The first waveform setting information is simple waveform setting information including one or more reference potential values ​​set along the time axis.

[0258] The second waveform setting information is formal waveform setting information including a plurality of power supply potential values ​​set for each of the reference potential values.

[0259] The waveform setting unit converts the simple waveform setting information into the formal waveform setting information, thereby generating the formal waveform setting information based on the simple waveform setting information.

[0260] (9) A liquid jet recording apparatus comprising the liquid jet head described in any one of (1) to (8) above.

[0261] Description of symbols

[0262] 1, 1B, 1C inkjet head; 10 connector; 11 ejection unit; 111 actuator plate; 112 nozzle plate; 12, 12B, 12CI / F substrate; 120a, 120b, 120c, 120d connector; 121 waveform setting unit; 122 control switching unit; 123 waveform storage unit; 124a first line switching unit; 124b second line switching unit; 13a, 13b, 13c, 13d, 13Ca, 13Cb, 13Cc, 13Cd flexible substrate; 141, 142 cooling unit; 2 printing control unit; 3 ink tank; 30 ink supply tube; 41 drive device; 42 drive information storage unit; 433 crimping electrode; 5 printer; 9 ink; P recording paper; Hn nozzle hole; Sc printing control signal; Sd drive signal; Vd Drive voltage; Ac circuit configuration area; Lex external control line; Lin internal control line; Lin1 1st internal control line; Lin2 2nd internal control line; Lda, Ldb, Ldc, Ldd drive control lines; C1 1st control communication; C2 2nd control communication; C3a, C3b, C3c, C3d 3rd control communication; Iw1 simple waveform setting information; Iw2 formal waveform setting information; Ie1 1st error information; Ie2 2nd error information; Id drive information; Dw1, Dw2 data volume; V1 reference potential value; V2 power supply potential value; V3 intermediate potential value information; SEL1, SEL2 selection signal; t time; t10~t19, t21~t26 timing; ΔT unit period; ΔtP, ΔtPH period.

Claims

1. A liquid ejecting head for ejecting liquid, comprising: a spraying portion that sprays the liquid; A plurality of drive substrates; One or more driving devices, which are respectively disposed in the plurality of driving substrates and eject the liquid by applying a driving signal having a predetermined driving waveform to the ejection portion; A waveform setting unit, which sets the driving waveform; a control switching unit, which is arranged between the waveform setting unit and the plurality of driving substrates; an external control line for performing a first control communication between the outside of the liquid ejecting head and the waveform setting section; an internal control line for performing a second control communication between the waveform setting section and the control switching section; as well as a plurality of drive control lines for individually performing third control communication between the control switching section and the drive device in each of the plurality of drive substrates, The waveform setting section generates second waveform setting information for setting the driving waveform based on first waveform setting information transmitted from outside the liquid ejecting head by the first control communication. The control switching unit, directly connected to the driving device via the driving control line, When the second waveform setting information transmitted from the waveform setting unit by the second control communication is transmitted to the driving device by the third control communication, Perform control switching between transmission control action and truncation control action, In the transmission control operation, the second waveform setting information is transmitted in parallel to the driving device in at least one driving substrate among the plurality of driving substrates by using the third control communication on at least one driving control line among the plurality of driving control lines. In the shutoff control operation, transmission of the second waveform setting information using the third control communication is shutoff for all of the plurality of drive control lines.

2. The liquid ejecting head according to claim 1, further comprising: a waveform storage unit for storing the first waveform setting information transmitted from the outside of the liquid ejecting head by the first control communication, The waveform setting unit, generating the second waveform setting information based on the first waveform setting information stored in the waveform storage unit, Furthermore, when the transmission control operation is performed by the control switching unit, the second waveform setting information is transmitted to the driving device by using the third control communication.

3. The liquid ejecting head according to claim 2, further comprising: a line switching section that switches the connection of the control line in a manner of performing one of indirect control communication and direct control communication, wherein the indirect control communication is control communication between the outside of the liquid ejecting head and the control switching section via the waveform setting section, The direct control communication is control communication between the outside of the liquid ejecting head and the control switching section without passing through the waveform setting section.

4. The liquid ejecting head according to claim 3, wherein: The line switching unit is configured to include: a first line switch that is selectively connected when the indirect control communication is performed; and a second line switching unit which is selectively connected when the direct control communication is performed, and The internal control line is composed of: a first internal control line disposed between the waveform setting section and the first line switching section; and The second internal control line is arranged between the first and second line switching section and the control switching section.

5. The liquid ejecting head according to claim 3 or claim 4, wherein: The control switching unit, When the direct control communication is performed, the connection between the external control line and the plurality of drive control lines is cut off by executing the cutoff control action.

6. The liquid ejecting head according to any one of claims 1 to 4, wherein: The waveform setting unit, using the third control communication and the second control communication to collect and store error information from the at least one drive device, and, outputting the error information to the outside of the liquid ejecting head by using the first control communication, The error information is related to an error detected at at least one of the driving devices at the plurality of driving substrates, and corresponds to the driving device that detected the error.

7. The liquid ejecting head according to any one of claims 1 to 4, wherein: Each of the plurality of drive control lines further includes a drive information storage unit for storing drive information, wherein the drive information includes a drive condition at the corresponding drive substrate. The waveform setting unit, By using the third control communication and the second control communication, the drive information is collected from the drive information storage unit at each of the plurality of drive control lines and stored. Then, the driving information is output to the outside of the liquid ejecting head by utilizing the first control communication.

8. The liquid ejecting head according to any one of claims 1 to 4, wherein: The first waveform setting information is simple waveform setting information including one or more reference potential values ​​set along the time axis. The second waveform setting information is formal waveform setting information including a plurality of power supply potential values ​​set for each of the reference potential values. The waveform setting unit converts the simple waveform setting information into the formal waveform setting information, thereby generating the formal waveform setting information based on the simple waveform setting information. 9 . A liquid jet recording apparatus comprising the liquid jet head according to claim 1 .

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