Control device, liquid ejection head, liquid ejection recording device, and control program

Abstract

The present application provides a control device that can improve reliability. A control device according to an embodiment of the present disclosure is a control device for a liquid ejection head having an ejection section that ejects liquid, and includes a determination section that determines whether a drive signal based on waveform setting information supplied from outside the liquid ejection head should be output from a drive device that generates the drive signal based on the waveform setting information to the ejection section.

Description

Technical Field

[0001] This disclosure relates to a control device, a liquid injection head, a liquid injection recording device, and a control program. Background Technology

[0002] Liquid jet recording devices equipped with liquid jet heads are used in various fields, and various types of jet heads have been developed as liquid jet heads (for example, see Patent Document 1).

[0003] [Existing Technical Documents]

[0004] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2017-170652. Summary of the Invention

[0006] [The problem the invention aims to solve]

[0007] In such liquid injection heads, improved reliability is generally required. There is a need to provide control devices, liquid injection heads, liquid injection recording devices, and control programs that can improve reliability.

[0008] [Solution to the problem]

[0009] One embodiment of the present disclosure relates to a control device applicable to a liquid jet head having a jetting section for spraying liquid. It includes a determination unit that determines whether a drive signal based on waveform setting information supplied from outside the liquid jet head should be output to the jetting section by a drive device that generates the drive signal based on the waveform setting information.

[0010] An embodiment of the liquid injection head disclosed herein includes: the control device described in the embodiment of the present disclosure; the injection section; and one or more of the aforementioned driving devices for injecting the liquid by applying the aforementioned driving signal to the injection section.

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

[0012] The control program disclosed in one embodiment is a control program applicable to a liquid injection head having an injection section for spraying liquid. The program causes a computer to perform a determination on whether the injection section should output a drive signal based on waveform setting information supplied from outside the liquid injection head, and whether the drive signal generated based on the waveform setting information should be output from the injection section.

[0013] [Invention Effects]

[0014] The control device, liquid injection head, liquid injection recording device and control program according to one embodiment of the present disclosure can improve reliability. Attached Figure Description

[0015] Figure 1 This is a block diagram illustrating a schematic configuration example of a liquid injection device according to an embodiment of the present disclosure.

[0016] Figure 2 It is shown schematically. Figure 1 A perspective view of a schematic configuration example of a liquid injection head.

[0017] Figure 3 It is shown schematically. Figure 2 A cross-sectional view of an example of the configuration of a liquid injection head.

[0018] Figure 4 It is shown Figures 1 to 3 A block diagram showing a detailed configuration example of a liquid injection head.

[0019] Figure 5 It is shown Figure 4 The timing diagram shows an example of the waveform setting information.

[0020] Figure 6 It is shown Figure 5 A schematic diagram showing a detailed example of the power supply potential values.

[0021] Figure 7 It is shown Figure 4 A block diagram illustrating an example of the action of a liquid injection head.

[0022] Figure 8 It is shown Figure 4 A block diagram showing other examples of actions on the liquid injection head.

[0023] Figure 9 This is a timing diagram showing an example of the first abnormal waveform setting.

[0024] Figure 10 This is a timing diagram showing an example of the second abnormal waveform setting.

[0025] Figure 11 This is a timing diagram showing an example of the third abnormal waveform setting.

[0026] Figure 12 This is a block diagram showing a configuration example of the liquid injection head involved in Modified Example 1.

[0027] Figure 13 This is a block diagram showing a configuration example of the liquid injection head involved in Modified Example 2.

[0028] Figure 14This is a block diagram showing a configuration example of the liquid injection head involved in Modified Example 3.

[0029] Figure 15A This is a schematic diagram illustrating an example of the correspondence between the range of driving voltage and the operation involved in Modification 1.

[0030] Figure 15B This is a schematic diagram illustrating an example of the correspondence between the temperature range of the device involved in Modification Example 2 and its operation.

[0031] Figure 15C This is a schematic diagram illustrating an example of the correspondence between the range of the driving current and the operation involved in Modification 3.

[0032] Figure 16 This is a block diagram showing a configuration example of the liquid injection head involved in Modification Example 4.

[0033] Figure 17 This is a block diagram showing a configuration example of the liquid injection head involved in Modified Example 5.

[0034] Figure 18 This is a block diagram showing a configuration example of the liquid injection head involved in Modified Example 6. Detailed Implementation

[0035] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Furthermore, the description will proceed in the following order.

[0036] 1. Implementation method (example based on whether or not a predetermined abnormal waveform setting is included)

[0037] 2. Variations

[0038] Variations 1-3 (Examples based on the values ​​of driving voltage, device temperature, and driving current)

[0039] Variation Example 4 (An example where a waveform storage unit for storing waveform setting information is further provided)

[0040] Modification Example 5 (An example where a waveform correction unit is further provided to correct waveform setting information)

[0041] Modification 6 (Example where only one drive board is installed inside the liquid injection head)

[0042] 3. Other variations

[0043] <1. Implementation Method>

[0044] [Brief Components of Printer 5]

[0045] Figure 1A schematic diagram illustrates a schematic configuration example of a printer 5, which is a liquid jet recording apparatus according to one embodiment of this disclosure. Figure 2 The diagram schematically illustrates the use of a 3D model as... Figure 1 The inkjet head 1 of the liquid jet head shown is a schematic example of its configuration. Figure 3 A schematic diagram is shown in the cross-sectional view (Y-Z cross-sectional view). Figure 2 The illustration shows an example of the configuration of the inkjet head 1. Furthermore, the scale of each component in the accompanying drawings used in this specification has been appropriately altered to ensure that each component is of a recognizable size.

[0046] Printer 5 uses ink 9, described later, to record on the medium (e.g., Figure 1 The recording paper P shown is used by an inkjet printer for recording (printing) images or characters, etc. For example... Figure 1 As shown, the printer 5 includes an inkjet head 1, a printing control unit 2, and an ink tank 3.

[0047] Furthermore, inkjet head 1 corresponds to a specific example of the "liquid jet head" in this disclosure, and printer 5 corresponds to a specific example of the "liquid jet recording device" in this disclosure. Additionally, ink 9 corresponds to a specific example of the "liquid" in this disclosure.

[0048] (A. Printing Control Department 2)

[0049] The printing control unit 2 supplies various information (data) to the inkjet head 1. Specifically, such as... Figure 1 As shown, the printing control unit 2 supplies printing control signals Sc to the inkjet head 1 (such as the drive device 41 described later). Furthermore, these printing control signals Sc include, for example, image data, an ejection timing signal, and a power supply voltage for operating the inkjet head 1. This printing control unit 2 corresponds to a specific example of the "exterior of the liquid jet head" in this disclosure.

[0050] (B. Ink can 3)

[0051] Ink container 3 is the container that internally holds ink 9. For example... Figure 1 As shown, the ink 9 in the ink tank 3 is supplied to the inkjet head 1 (the jet section 11 described later) via the ink supply tube 30. Furthermore, such an ink supply tube 30 is, for example, made of a flexible hose.

[0052] (C. Inkjet head 1)

[0053] like Figure 1 As shown by the dashed arrow, the inkjet head 1 is a head that records images or characters by ejecting (ejecting) droplets of ink 9 from multiple nozzle orifices Hn onto the recording paper P. For example, as... Figure 2 , Figure 3As shown, the inkjet head 1 includes: a jetting section 11; an I / F (interface) substrate 12; four flexible substrates 13a, 13b, 13c, and 13d; and two cooling units 141 and 142.

[0054] (C-1. I / F substrate 12)

[0055] like Figure 2 , Figure 3 As shown, the I / F substrate 12 includes: two connectors 10; four connectors 120a, 120b, 120c, and 120d; and a circuit configuration area Ac.

[0056] like Figure 2 As shown, connector 10 is the part (connector part) that inputs the aforementioned printing control signal Sc supplied from the printing control unit 2 to the inkjet head 1 (each flexible substrate 13a, 13b, 13c, 13d described later).

[0057] Connectors 120a, 120b, 120c, and 120d are respectively the parts (connector parts) that electrically connect the I / F substrate 12 to the flexible substrates 13a, 13b, 13c, and 13d.

[0058] The circuit configuration area Ac is the area on the I / F substrate 12 where various circuits are configured. Furthermore, such circuit configuration areas can also be provided in other areas on the I / F substrate 12.

[0059] (C-2. Jet section 11)

[0060] like Figure 1 As shown, the ejection section 11 is a portion having multiple nozzle holes Hn from which ink 9 is ejected. The ejection of ink 9 occurs in response 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, 13d (see reference). Figure 1 ).

[0061] like Figure 1 As shown, such a jet section 11 is configured to include an actuator plate 111 and a nozzle plate 112.

[0062] (Nozzle plate 112)

[0063] 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, there are multiple nozzle holes Hn as described above. These nozzle holes Hn are formed side by side at predetermined intervals, for example, in a circular shape.

[0064] Specifically, in Figure 2In the example of the injection section 11 shown, the plurality of nozzle holes Hn in the nozzle plate 112 are composed of a plurality of nozzle rows (4 nozzle rows) arranged along the column direction (X-axis direction). In addition, these 4 nozzle rows are arranged side by side with each other along a direction orthogonal to the column direction (Y-axis direction).

[0065] (Actuator plate 111)

[0066] The actuator plate 111 is a plate made of a piezoelectric material such as PZT (lead zirconate titanate). Multiple channels (pressure chambers) are provided on this actuator plate 111. These channels, which are used to apply pressure to the ink 9, are arranged side-by-side in a parallel manner with predetermined intervals. Each channel is divided by a drive wall (not shown) made of a piezoelectric material, which appears as a concave groove in cross-section.

[0067] Such a channel contains an outlet channel for dispensing ink 9 and a pseudo-channel (non-dispensing channel) for not dispensing ink 9. In other words, the outlet channel is filled with ink 9, while the pseudo-channel is not filled with ink 9. Furthermore, ink 9 fills each outlet channel, for example, via a flow path (common flow path) that is connected to each of such outlet channels. In addition, each outlet channel is individually connected to a nozzle orifice Hn on the nozzle plate 112, while each pseudo-channel is not connected to a nozzle orifice Hn. These outlet channels and pseudo-channels are arranged alternately side by side along the aforementioned column direction (X-axis direction).

[0068] Furthermore, driving electrodes are respectively provided on the opposing inner surfaces of the aforementioned driving wall. These driving electrodes include a common electrode (shared electrode) on the inner surface facing the ejection channel and active electrodes (individual electrodes) on the inner surface facing the pseudo-channel. These driving electrodes are electrically connected to the driving device 41, described later, via flexible substrates 13a, 13b, 13c, and 13d. Thus, the aforementioned driving voltage Vd (driving signal Sd) is applied from the driving device 41 to each driving electrode (see reference 13a, 13b, 13c, and 13d) via the flexible substrates 13a, 13b, 13c, and 13d. Figure 1 ).

[0069] (C-3. ​​Flexible substrates 13a, 13b, 13c, 13d)

[0070] like Figure 2 , Figure 3 As shown, flexible substrates 13a, 13b, 13c, and 13d are substrates electrically connecting the I / F substrate 12 and the ejection section 11. Each of these flexible substrates 13a, 13b, 13c, and 13d individually controls the ejection action of ink 9 from each of the four rows of nozzles in the aforementioned nozzle plate 112. Furthermore, for example, as... Figure 3As indicated by reference numerals P1a, P1b, P1c, and P1d, each flexible substrate 13a, 13b, 13c, and 13d is bent near the location where it connects to the spraying section 11 (near the pressing electrode 433). Furthermore, the pressing electrode 433 and the spraying section 11 are electrically connected to each other, for example, by using thermal bonding of an ACF (Anisotropic Conductive Film).

[0071] One or more actuators 41 are individually mounted on such flexible substrates 13a, 13b, 13c, and 13d (see reference). Figure 3 These driving devices 41 are devices that output a driving signal Sd (driving voltage Vd) for ejecting ink 9 from the nozzle orifice Hn in the corresponding nozzle row of the ejection section 11. Furthermore, this driving signal Sd has a predetermined driving waveform (described in detail later). Therefore, such a driving signal Sd is output to the ejection section 11 from each of the flexible substrates 13a, 13b, 13c, and 13d. Moreover, each of these driving devices 41 is, for example, constructed from an ASIC (Application Specific Integrated Circuit).

[0072] Furthermore, these driving components 41 are cooled by the aforementioned cooling units 141 and 142. Specifically, as... Figure 3 As shown, cooling units 141 are fixedly arranged between each other on the flexible substrates 13a and 13b, and each driving device 41 is cooled by pressing the cooling units 141 against each other. Similarly, cooling units 142 are fixedly arranged between each other on the flexible substrates 13c and 13d, and each driving device 41 is cooled by pressing the cooling units 142 against each other. Furthermore, such cooling units 141 and 142 can be constructed using various cooling mechanisms.

[0073] [Detailed Composition of Inkjet Head 1]

[0074] Next, besides Figures 1 to 3 In addition, refer to Figure 4 The detailed configuration of the inkjet head 1 will be explained.

[0075] Figure 4 A block diagram is shown. Figures 1 to 3 A detailed example of the configuration of the inkjet head 1 shown. For example... Figure 4As shown, the inkjet head 1 includes the aforementioned I / F substrate 12, flexible substrates 13a-13d, and ejection section 11. Furthermore, the I / F substrate 12 has a control device 120 including a determination section 121 and a control switching section 122, and the flexible substrates 13a-13d each have a plurality of driving devices 41. Moreover, the plurality of driving devices 41 within each flexible substrate 13a-13d are, for example, connected in series (cascaded connection).

[0076] (Judgment Section 121)

[0077] The determination unit 121 determines whether the drive signal Sd, based on the waveform setting information Iw supplied from outside the inkjet head 1 (print control unit 2), should be output to the ejection unit 11 from each of the aforementioned drive devices 41. Specifically, in this embodiment, the determination unit 121 determines whether the waveform setting information Iw contains a predetermined abnormal waveform setting, which will be described later. Furthermore, if the determination unit 121 determines that the waveform setting information Iw contains such an abnormal waveform setting, it determines that the drive signal Sd should not be output from each of the drive devices 41.

[0078] Furthermore, as described above, when the determination unit 121 determines that a drive signal Sd should not be output from each drive device 41, it performs the following operations. That is, in this case, the determination unit 121 outputs an ejection stop signal Sst to each drive device 41 to stop the ejection of ink 9 from the ejection unit 11 (see reference). Figure 8 (Details will be described later). Additionally, in this case, the determination unit 121 notifies the user of an error by outputting error information Ie to the outside of the inkjet head 1 (print control unit 2) (see [reference]). Figure 8 (Details will be described later).

[0079] Furthermore, details of the waveform setting information Iw will be described later (see [reference]). Figure 5 , Figure 6 Furthermore, details of the aforementioned determination action performed using the determination unit 121 will be described later (see [reference]). Figures 9 to 11 ).

[0080] (Control switching unit 122)

[0081] like Figure 4 As shown, the control switching unit 122 is disposed between the determination unit 121 and the plurality of flexible substrates 13a to 13d. This control switching unit 122 is configured to perform a predetermined control switching operation when transmitting waveform setting information Iw, etc., transmitted from the determination unit 121 to each of the driving devices 41 within the plurality of flexible substrates 13a to 13d. Specifically, the control switching unit 122 performs a control switching operation between a transmission control operation and a cutoff control operation.

[0082] During transmission control, waveform setting information Iw is transmitted in parallel to the driver device 41 of at least one of the multiple flexible substrates 13a to 13d. On the other hand, during cutoff control, the transmission of waveform setting information Iw is cut off for each driver device 41 in all of the flexible substrates 13a to 13d.

[0083] [Composition of Waveform Setting Information]

[0084] Next, besides Figure 4 In addition, refer to Figure 5 and Figure 6 Here is an example of how the waveform setting information Iw is constructed (data construction example).

[0085] Figure 5 The timing diagram illustrates an example of the structure of waveform setting information Iw (a typical waveform setting example). Specifically, Figure 5 (B) shows an example of the data structure for waveform setting information Iw. Figure 5 (A) shows an example of the waveform of the drive signal Sd set using the waveform setting information Iw. Furthermore, in Figure 5 The horizontal axis in the graph represents time t. Additionally... Figure 6 schematically shown Figure 5 (B) shows a detailed example of the power supply potential value V2, which will be described later.

[0086] The waveform setting information Iw includes various power supply potential values ​​V2 set along the time axis and information representing VPH as an intermediate potential value (intermediate potential value information V3). Specifically, as follows... Figure 5 As shown in (B), for each period of each power supply potential value V2 and each intermediate potential value information V3, the waveform setting information Iw has ASW_SEL as power supply selection information, VSEL as power supply potential value information and LENGTH as power supply potential period information.

[0087] In detail, Figure 5 In example (B), firstly, ASW_SEL, VSEL, and LENGTH are set for each of the following time periods: t10~t11, t11~t12, t12~t13, t13~t14, t14~t15, t15~t16, t16~t17, t17~t18, and t18~t19. Additionally, in this… Figure 5In example (B), the aforementioned intermediate potential value information V3 is additionally set between the power supply potential values ​​V2 along the time axis during the time periods t11 to t12 (time period t11 to t21), t12 to t13 (time period t12 to t22), t13 to t14 (time period t13 to t23), t14 to t15 (time period t14 to t24), t15 to t16 (time period t15 to t25), and t16 to t17 (time period t16 to t26).

[0088] The aforementioned ASW_SEL is information used to select one of several power supply potential values ​​V2. Specifically, in Figure 5 (B) Figure 6 In the example shown, ASW_SEL is represented by a hexadecimal value (2 digits), and its correspondence with the six power supply potential values ​​V2 is as follows. That is, for example, corresponding to... Figure 6 Each of GND (ground potential value as a predetermined reference potential value), VP (predetermined positive potential value), and VM (predetermined negative potential value) shown is individually configured with (GND1 / GND2), (VP1 / VP2), and VM1 (reference). Figure 6 Additionally, in this Figure 6 In the example described below, with ASW_SEL = 0x20, the above-mentioned VPH (=VC) is set as the intermediate potential value.

[0089] • ASW_SEL = 0x01 → V2 = GND1 (First grounding potential value)

[0090] • ASW_SEL = 0x02 → V2 = GND2 (Second grounding potential value)

[0091] • ASW_SEL = 0x04 → V2 = VP1 (first positive potential value)

[0092] • ASW_SEL = 0x08 → V2 = VP2 (Second positive potential value)

[0093] • ASW_SEL = 0x10 → V2 = VM1 (first negative potential value)

[0094] • ASW_SEL = 0x20 → V2 = VPH (= VC) (intermediate potential value)

[0095] Regarding the aforementioned VSEL, a power supply potential value V2 selected by ASW_SEL is set along the time axis (refer to...). Figure 5 (B)).

[0096] The LENGTH mentioned above represents the period for each power supply potential value V2 in the VSEL, during which... Figure 5 In the example shown in (B), the number of internal clocks used in the driving device 41 is represented by 2 bits of a hexadecimal value. Specifically, for example, when the internal clock period is 50 [ns], it becomes 50 [ns] × 16 = 800 [ns] in LENGTH = 0x10, 50 [ns] × 30 = 1.5 [μs] in LENGTH = 0x1E, and 50 [ns] × 60 = 3.0 [μs] in LENGTH = 0x3C.

[0097] Here, the aforementioned intermediate potential value VPH (VSEL = VPH) is the potential value in the power supply potential value V2 set in the drive waveform of the drive signal Sd, located between the ground potential value (GND1 / GND2) and the positive potential value (VP1 / VP2) used as the reference potential value. Furthermore, in Figure 5 In the example shown in (B), VPH is set as follows: VPH = positive potential value (VP1 / VP2) × 0.5. However, the value of VPH is not limited to this example (positive potential value × 0.5), and can be any potential value located between the reference potential value (ground potential value GND) and the positive potential value VP.

[0098] In addition, such a VPH is set as follows Figure 5 When using the stepped drive waveform shown in (A) (such as the rise or fall of the waveform in the drive signal Sd), only a short period is set during the rise or fall phase. Specifically, during the rise or fall phase (when transitioning between the aforementioned reference potential value and the positive potential value), it is preferable to set it via VPH (described in detail later). This reduces the power consumption (for the drive current of the ejector 11, which is the load capacitor) when setting such a stepped drive waveform.

[0099] Here, in Figure 6 In the example shown, at least a portion of the multiple power supply potential values ​​V2 (the aforementioned ground potential value GND, positive potential value VP, and negative potential value VM) include multiple (two in this example) power supply potential values ​​V2 corresponding to the supply values ​​from different power lines. That is, as described above, it includes two ground potential values ​​(GND1 / GND2) and two positive potential values ​​(VP1 / VP2). Moreover, in Figure 5 In the example shown in (B), these multiple (two) power supply potential values ​​V2 are set to change in a predetermined order within a predetermined unit period ΔT (in this example, the two power supply potential values ​​V2 are changed alternately).

[0100] This is because the permissible current consumption per unit period ΔT on each of the aforementioned power lines increases significantly (details will be described later). Specifically, for example, if two power lines (each with a permissible current consumption of 300 [mA]) at the same potential are set, and the drive waveform is set by alternately selecting these two power lines, the maximum permissible current consumption as a whole can be considered to be 600 [mA]. ​​Furthermore, even if they are not selected alternately, for example, as long as the operating frequency (set frequency) of these two power lines is the same within the unit period ΔT, the permissible current consumption can be increased significantly in the same way.

[0101] Thus, it is preferable to set the same type of power supply potential value V2 to be used less than a predetermined number of times (e.g., 2 or 3 times) within a unit period ΔT. This is because the above prevents damage to the inkjet head 1 caused by exceeding the allowable current consumption value per unit period ΔT in the power supply line (described in detail later).

[0102] Here, the flexible substrates 13a to 13d described above each correspond to a specific example of the "driving substrate" in this disclosure. Furthermore, the VSEL described above corresponds to a specific example of the "power supply potential value information" in this disclosure, and the ground potential values ​​GND (GND1, GND2) described above each correspond to a specific example of the "reference potential value" in this disclosure. Additionally, the positive potential values ​​VP (VP1, VP2) described above each correspond to a specific example of the "positive potential value" in this disclosure, and the negative potential value VM (VM1) described above each correspond to a specific example of the "negative potential value" in this disclosure. Furthermore, the VPH described above corresponds to a specific example of the "intermediate potential value" in this disclosure.

[0103] [Actions and their functions / effects]

[0104] (A. Basic Operations of Printer 5)

[0105] In this printer 5, the ink 9 ejection action of the inkjet head 1 is used to perform the recording action (printing action) of the image or characters on the recording medium (recording paper P, etc.). Specifically, in the inkjet head 1 of this embodiment, the ink 9 ejection action using the cut (share) mode is performed as follows.

[0106] First, the actuators 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 electrode and active electrode) within the actuator plate 111 in the ejection section 11. Specifically, each actuator 41 applies the driving voltage Vd to each driving electrode disposed on a pair of driving walls that divide the aforementioned ejection channel. As a result, these pairs of driving walls deform in a manner that protrudes toward the pseudo-channel side adjacent to their ejection channel.

[0107] At this point, the drive wall bends and deforms in a V-shape, centered on the middle position along its depth direction. Furthermore, this bending deformation of the drive wall causes the ejection channel to expand. Thus, the bending deformation caused by the piezoelectric thickness slip effect on the pair of drive walls increases the volume of the ejection channel. Moreover, the increased volume of the ejection channel induces the ink 9 to be drawn into the ejection channel.

[0108] Next, the ink 9 thus induced into the ejection channel becomes a pressure wave and is transmitted into the interior of the ejection channel. Moreover, at the timing (or near the timing) when this pressure wave reaches the nozzle orifice Hn of the nozzle plate 112, the driving voltage Vd applied to the driving electrode becomes 0 (zero) V. As a result, the driving wall recovers from the aforementioned bent and deformed state, and the temporarily increased volume of the ejection channel returns to its original state.

[0109] Thus, as the volume of the ejection channel returns to its initial state, the pressure inside the ejection channel increases, pressurizing the ink 9 within it. As a result, droplets of ink 9 are ejected outwards (towards the recording paper P) through the nozzle orifice Hn (see reference). Figure 1 , Figure 2 , Figure 4 This ejects ink 9 from the inkjet head 1, resulting in the recording of images or characters on the recording paper P.

[0110] (B. Detailed actions and functions / effects)

[0111] Next, the detailed operation, function, and effect of the inkjet head 1 in this embodiment will be explained while comparing it with existing methods.

[0112] (B-1. Existing methods)

[0113] First, in recent years, the drive waveforms in the drive signals that drive the ejection section within the inkjet head have become more complex. These complex waveforms are used to achieve various effects, such as reducing drive noise during ejection, correcting deviations in ejection performance, or improving print quality. Specifically, for example, in the aforementioned Patent Document 1, voltage correction is applied to the common drive waveform driving each nozzle in order to suppress deviations in the ejection volume of each nozzle.

[0114] However, while this method is effective in driving the inkjet head, setting the drive waveform itself becomes more complex. Furthermore, while this complex drive waveform can achieve the desired effect when correctly set, incorrect settings can not only fail to produce the expected results but may also cause malfunctions, damage, or other issues to the inkjet head.

[0115] Another approach is to include setting a readout function for the drive waveform within the inkjet head, comparing the actual drive waveform set in the inkjet head with the intended drive waveform, thereby detecting and correcting errors in the drive waveform setting. However, this method only compares transmitted and received data related to the waveform setting; it will be ineffective if the transmitted data itself is incorrect.

[0116] Thus, it can be said that the reliability of the inkjet head may decrease in the existing methods.

[0117] (B-2. Determining actions, etc.)

[0118] Therefore, in the inkjet head 1 of this embodiment, various actions will be performed (such as the determination action of the determination unit 121).

[0119] Specifically, as described above, the determination unit 121 determines whether the drive signal Sd based on the waveform setting information Iw supplied from the outside of the inkjet head 1 (print control unit 2) should be output to the ejection unit 11 from each drive device 41.

[0120] Then, based on the determination result, for example, perform... Figure 7 , Figure 8 The various actions shown. These Figure 7 , Figure 8 Examples of actions in the inkjet head 1 (various examples of actions based on the determination result of the determination unit 121) are shown in block diagrams.

[0121] First, in the determination unit 121, when it is determined that the drive signal Sd should be output, for example, the following steps are performed: Figure 7 The operation is as shown. That is, in this case, firstly, using the transmission control operation performed by the aforementioned control switching unit 122, waveform setting information Iw is transmitted in parallel from the determination unit 121 to the driving device 41 of at least one of the multiple flexible substrates 13a to 13d via the control switching unit 122. Moreover, based on the waveform setting information Iw transmitted in this way, a driving signal Sd is output from each driving device 41 to the ejection unit 11, and the aforementioned ink 9 ejection operation from the ejection unit 11 will be performed.

[0122] On the other hand, in the determination unit 121, when it is determined that the drive signal Sd should not be output, for example, the following steps are performed: Figure 8 The operation is as shown. That is, in this case, a stop signal Sst is first transmitted in parallel from the determination unit 121 to the driving device 41 of at least one of the multiple flexible substrates 13a to 13d. Moreover, based on the transmitted stop signal Sst, a stop drive signal Sd is output from each driving device 41 to the ejection unit 11 (see reference). Figure 8The "×" mark shown will stop the ink 9 from being ejected from the ejector unit 11. Additionally, as shown... Figure 8 As shown, at this time, the determination unit 121 outputs error information Ie to the outside of the inkjet head 1 (printing control unit 2), thereby providing error notification. Furthermore, in Figure 8 The example shown illustrates a case where the output stop signal Sst is not transmitted to each driver 41 via the control switching unit 122, but this is not an isolated case. That is, for example, with... Figure 7 Similarly, in the case of the waveform setting information Iw shown, the output stop signal Sst can also be transmitted to each driver device 41 via the control switching unit 122. Furthermore, the output operation of such an output stop signal Sst and error information Ie when it is determined that the drive signal Sd should not be output is also the same in the various modifications (modifications 1 to 6) described later.

[0123] In addition, in this embodiment, as described above, if the waveform setting information Iw contains a predetermined abnormal waveform setting, the determination unit 121 determines that the drive signal Sd should not be output from the drive device 41.

[0124] Here, Figures 9 to 11 Examples of the settings for these first through third abnormal waveforms are shown in timing diagrams. Furthermore, these... Figures 9 to 11 The examples shown are respectively modified from the aforementioned Figure 5 This corresponds to a partial example of the waveform setting information Iw shown (a normal waveform setting example).

[0125] First of all, Figure 9 In the example of the first abnormal waveform setting shown, the waveform setting is one that does not pass through the aforementioned intermediate potential value (VPH) during the transition (rising or falling transition) between the aforementioned ground potential value (GND1 / GND2) and the positive potential value (VP1 / VP2) which serves as the reference potential value. Specifically, in this example of the first abnormal waveform setting, with Figure 5 Unlike the normal waveform settings shown, when transitioning from a rising ground potential value (GND1 / GND2) to a positive potential value (VP1 / VP2), the transition is direct to the positive potential value (VP1 / VP2) without passing through an intermediate potential value (VPH). Similarly, when transitioning from a falling positive potential value (VP1 / VP2) to a ground potential value (GND1 / GND2), the transition is also different. Figure 5 Unlike the normal waveform settings shown, it transitions directly to the ground potential (GND1 / GND2) without going through the intermediate potential value (VPH).

[0126] Then, if the first abnormal waveform setting is included in the aforementioned VSEL (power potential value information) in the waveform setting information Iw, the determination unit 121 determines that the drive signal Sd should not be output.

[0127] In addition, Figure 10 In the example of the second abnormal waveform setting shown, the waveform setting is one that does not pass through the ground potential value (GND1 / GND2) as the reference potential value during the transition (rising or falling transition) between the aforementioned negative potential value (VM1 / VM2 (=VC)) and positive potential value (VP1 / VP2). Specifically, in this example of the second abnormal waveform setting, with Figure 5 Unlike the normal waveform settings shown, when transitioning from a negative potential value (VM1 / VM2) to a positive potential value (VP1 / VP2), the transition occurs directly to the positive potential value (VP1 / VP2) without passing through the ground potential value (GND1 / GND2). Similarly, when transitioning from a positive potential value (VP1 / VP2) to a negative potential value (VM1 / VM2), the transition also occurs... Figure 5 Unlike the normal waveform settings shown, it transitions directly to the negative potential value (VM1 / VM2) without going through the ground potential value (GND1 / GND2).

[0128] Then, if the second abnormal waveform setting is included in the waveform setting information Iw, the determination unit 121 determines that the drive signal Sd should not be output.

[0129] In addition, Figure 11 In the example of the third abnormal waveform setting shown, the power supply potential value V2 of the same type is used more than a predetermined number of times (e.g., 2 or 3 times) within a unit period ΔT. Specifically, in this example of the third abnormal waveform setting, the power supply potential value V2 of the same type is used more than a predetermined number of times (e.g., 2 or 3 times). Figure 5 Unlike the normal waveform settings shown, the same type of power supply potential value V2 (=GND1) is used 3 times (continuously) within a unit period ΔT (refer to...). Figure 11 (Referring to label P21). Additionally, in this example of setting the third abnormal waveform, [it is related to...]. Figure 5 Unlike the normal waveform settings shown, the power supply potential value V2 (=VP1) of the same type is used twice (continuously) within a unit period ΔT (refer to...). Figure 11 (Page P22).

[0130] Then, if the third abnormal waveform setting is included in the waveform setting information Iw, the determination unit 121 determines that the drive signal Sd should not be output.

[0131] In addition to the above-mentioned predetermined abnormal waveform settings, besides the first to third abnormal waveform settings, the following waveform settings can also be cited as examples.

[0132] That is, firstly, for example, the setting period of the aforementioned intermediate potential value (VPH) can be cited (refer to...). Figure 5 The length of the period ΔtPH shown in (A) becomes greater than the original (VP1 / VP2) or (GND1 / GND2) setting period before the additional setting of VPH (see reference). Figure 5 (B) shows the case where the length of the period ΔtP is (ΔtPH ≥ ΔtP). This is because if it becomes (ΔtPH ≥ ΔtP), the period of (VP1 / VP2) or (GND1 / GND2) will disappear when the VPH setting period is added, resulting in an unsuitable drive waveform. Furthermore, if the value of LENGTH in the period ΔtPH is, for example, below 0x03 or above 0x09, it can be determined as an abnormal waveform setting.

[0133] Additionally, for example, if a power supply potential value other than GND (GND1 / GND2) is set at the beginning and end of the waveform settings along the time axis, it can be judged as an abnormal waveform setting. This is to prevent the selection of an unwanted drive power supply. Specifically, this is because, for example, if V2 = VP1 at the end of the first waveform and V2 = VM at the beginning of the second waveform, when these two waveforms are output consecutively, a voltage change will occur from VP1 to VM, thereby increasing power consumption.

[0134] (B-3. Function / Effect)

[0135] Thus, in this embodiment, the determination unit 121 determines whether the drive signal Sd based on the waveform setting information Iw should be output from the drive device 41 to the ejection unit 11, as follows: For example, even if the user of the inkjet head 1 makes an incorrect setting (such as setting the waveform setting information Iw), a determination is made as to whether the drive signal Sd should be output to the ejection unit 11 (to execute the ejection of ink 9 from the ejection unit 11). Therefore, various countermeasures can be taken against malfunctions or damage to the inkjet head 1. As a result, in this embodiment, the reliability of the inkjet head 1 can be improved.

[0136] Specifically, in this embodiment, when it is determined that the drive signal Sd should not be output, a stop signal Sst is output to the drive device 41, and an error message Ie is output to the outside of the inkjet head 1 (print control unit 2) to notify the user of an error. Therefore, by stopping the ejection of ink 9 from the ejection unit 11, malfunctions or damage to the inkjet head 1 can be effectively prevented, and the reliability of the inkjet head 1 can be further improved. Furthermore, the user's ability to receive the error notification also improves convenience.

[0137] Furthermore, in this embodiment, if the waveform setting information Iw contains a predetermined abnormal waveform setting, a determination will be made that the drive signal Sd should not be output, and thus, various countermeasures can be taken against malfunctions or damage to the inkjet head 1 caused by the drive signal Sd generated using such an abnormal waveform setting. As a result, the reliability of the inkjet head 1 is prevented from decreasing due to such a drive signal Sd, thereby improving reliability.

[0138] Furthermore, in this embodiment, as the aforementioned predetermined abnormal waveform setting, when the first abnormal waveform setting (refer to...) is... Figure 9 When the VSEL (power supply potential information) is included in the waveform setting information Iw, a determination is made that the drive signal Sd should not be output, and thus it becomes as follows. That is, for example, when setting a stepped drive waveform (the drive waveform during the transition between the aforementioned ground potential value (GND) and the positive potential value (VP) as the reference potential value), countermeasures can be taken to reduce power consumption caused by the increase in drive current in the power supply pointing to that positive potential value. As a result, the reliability of the inkjet head 1 can be improved.

[0139] Furthermore, in this embodiment, as the aforementioned predetermined abnormal waveform setting, when the aforementioned second abnormal waveform setting (refer to...) Figure 10 When VSEL is included in the waveform setting information Iw, a determination is made that the drive signal Sd should not be output, and thus it becomes as follows. That is, for example, when setting a stepped drive waveform (the drive waveform during the transition between the aforementioned negative potential value (VM) and positive potential value (VP), various countermeasures can be taken against damage to the inkjet head 1 caused by the occurrence of useless drive current in the power supply at the negative potential value and heat generation in the drive device 41. As a result, the reliability of the inkjet head 1 can be improved by preventing the decrease in reliability of the inkjet head 1 caused by such damage.

[0140] Furthermore, in this embodiment, as the aforementioned predetermined abnormal waveform setting, when the aforementioned third abnormal waveform setting (refer to...) Figure 11When VSEL is included in the waveform setting information Iw, a determination is made that the drive signal Sd should not be output, and therefore, as described above, various countermeasures can be taken to address damage to the inkjet head 1 caused by exceeding the allowable current consumption value per unit period ΔT in the power line when the power supply potential value is set to the same type and used more than a predetermined number of times within a unit period ΔT. As a result, the reliability of the inkjet head 1 can be improved by preventing such damage and other issues.

[0141] Furthermore, in this embodiment, the waveform setting information Iw is transmitted in parallel via the control switching unit 122 to each driving device 41 within the plurality of flexible substrates 13a to 13d (see reference). Figure 7 Therefore, it becomes as follows. That is, for example, compared with the case where waveform setting information Iw is transmitted sequentially to the driving device 41 in each flexible substrate 13a to 13d, the time required to set the driving waveform (setting time) can be shortened to the maximum extent (about 1 / 4).

[0142] <2. Variations>

[0143] Next, variations of the above embodiments (variations 1 to 6) will be described. Furthermore, the same reference numerals will be used for the same components as those in the embodiments, and descriptions will be omitted as appropriate.

[0144] [Variations 1-3]

[0145] Figures 12 to 14 Block diagrams are provided for the configuration examples of the liquid jet heads (inkjet heads 1A to 1C) involved in variations 1 to 3. Furthermore, Figures 15A to 15C An example of the correspondence involved in variations 1 to 3 is shown schematically. Specifically, in Figure 15A An example of the correspondence (the range of the driving voltage Vd and the correspondence of the operation) involved in Modification 1 is shown. Additionally, in Figure 15B An example of the correspondence involved in Modification 2 (the correspondence between the range of device temperature Td and the operation, described later) is shown. Additionally, in Figure 15C An example of the correspondence involved in Variation 3 (the correspondence between the range of the drive current Id and the operation, which will be described later) is shown.

[0146] (The structure of variation 1)

[0147] first, Figure 12 The inkjet head 1A shown in Modified Example 1 corresponds to: the inkjet head 1 in the embodiment (refer to...) Figure 4In the I / F substrate 12, an I / F substrate 12A is provided instead of an I / F substrate 12. In addition, this I / F substrate 12A corresponds to the following: in the I / F substrate 12, a control device 120A including a determination unit 121A is provided instead of a control device 120 including a determination unit 121.

[0148] Furthermore, the inkjet head 1A corresponds to a specific example of the "liquid jet head" in this disclosure. Additionally, the printer equipped with the inkjet head 1A corresponds to a specific example of the "liquid jet recording device" in this disclosure.

[0149] like Figure 12 As shown, the determination unit 121A acquires information about the driving voltage Vd contained in the printing control signal Sc. Furthermore, the determination unit 121A determines whether the driving voltage Vd falls within a predetermined voltage range ΔVd (refer to...). Figure 15A The value is determined within the range of ). Furthermore, for example, such as Figure 15A As shown, the voltage range ΔVd is the voltage range that satisfies the threshold voltage (lower limit) Vdth1≤Vd≤th threshold voltage (upper limit) Vdth2.

[0150] Here, the determination unit 121A determines that the drive signal Sd should be output when the drive voltage Vd is within the voltage range ΔVd (Vdth1≤Vd≤Vdth2). On the other hand, the determination unit 121A determines that the drive signal Sd should not be output when the drive voltage Vd is outside the voltage range ΔVd (Vdth1>Vd or Vd>Vdth2).

[0151] Furthermore, as a detailed example of the voltage range ΔVd in the aforementioned driving voltage Vd, the following can be cited:

[0152] 20V≤(VP1-VM)≤50V;

[0153] 10≤VP1≤26V;

[0154] -26V≤VM≤-10V.

[0155] (The structure of variation 2)

[0156] in addition, Figure 13 The inkjet head 1B shown in Modified Example 2 corresponds to: the inkjet head 1 in the embodiment (refer to...) Figure 4 In the I / F substrate 12, an I / F substrate 12B is provided instead of an I / F substrate 12. In addition, this I / F substrate 12B corresponds to the following: in the I / F substrate 12, a control device 120B including a determination unit 121B is provided instead of a control device 120 including a determination unit 121.

[0157] Furthermore, the inkjet head 1B corresponds to a specific example of the "liquid jet head" in this disclosure. Additionally, the printer equipped with this inkjet head 1B corresponds to a specific example of the "liquid jet recording device" in this disclosure.

[0158] like Figure 13 As shown, the determination unit 121B obtains information about the device temperature Td in each of the multiple flexible substrates 13a to 13d from each of the actuators 41. Furthermore, the determination unit 121B determines whether the device temperature Td falls within a predetermined temperature range ΔTd (refer to...). Figure 15B The value is determined within the range of ). Furthermore, for example, such as Figure 15B As shown, the temperature range ΔTd is the temperature range that satisfies the threshold temperature (lower limit) Tdth1≤Td≤th threshold temperature (upper limit) Tdth2.

[0159] Here, the determination unit 121B determines whether the drive signal Sd should be output when the device temperature Td is within the temperature range ΔTd (Tdth1≤Td≤Tdth2). On the other hand, the determination unit 121B determines whether the drive signal Sd should not be output when the device temperature Td is outside the temperature range ΔTd (Tdth1>Td or Td>Tdth2).

[0160] Incidentally, the rise in device temperature Td of the drive device 41 itself may be caused by factors such as the aforementioned cooling unit 141 (metal plate, etc.) used for cooling the drive device 41 peeling off due to vibration or other reasons, or the inability to display its cooling performance. Additionally, for example, if the user does not follow the recommended operating conditions for guaranteeing the performance of the inkjet head 1B, the temperature rise of the drive device 41 exceeding the cooling performance of the cooling unit 141 may also be a cause.

[0161] (The structure of variation 3)

[0162] in addition, Figure 14 The inkjet head 1C shown in Modified Example 3 corresponds to: the inkjet head 1 in the embodiment (refer to...) Figure 4 In the I / F substrate 12, an I / F substrate 12C is provided instead of an I / F substrate 12. In addition, the I / F substrate 12C corresponds to the following: in the I / F substrate 12, a control device 120C including a determination unit 121C is provided instead of a control device 120 including a determination unit 121, and a current detection unit 123 is further provided.

[0163] Furthermore, the inkjet head 1C corresponds to a specific example of the "liquid jet head" in this disclosure. Additionally, the printer equipped with this inkjet head 1C corresponds to a specific example of the "liquid jet recording apparatus" in this disclosure.

[0164] like Figure 14 As shown, the current detection unit 123 acquires information about the drive current Id generated when the ejection section 11 is driven to eject based on the drive signal Sd in each of the multiple flexible substrates 13a to 13d. Specifically, firstly, the drive power included in the printing control signal Sc is also supplied to the current detection unit 123, and a current detection resistor is provided in the current detection unit 123 so that the power supply for inspection is supplied to each drive device 41 through the current detection resistor. Moreover, when the ejection section 11 is driven to eject by each drive device 41, since the drive current Id flows through the current detection resistor, the voltage drop generated on the current detection resistor is detected by the analog-to-digital converter and transmitted as a current measurement value.

[0165] In addition, the determination unit 121C determines whether the drive current Id is within the predetermined current range ΔId (refer to...). Figure 15C The value is determined within the range of ). Furthermore, for example, such as Figure 15C As shown, the current range ΔId is the current range that satisfies the threshold current (lower limit) Idth1≤Id≤th threshold current (upper limit) Idth2.

[0166] Here, the determination unit 121C determines that the drive signal Sd should be output when the drive current Id is within the current range ΔId (Idth1≤Id≤Idth2). On the other hand, the determination unit 121C determines that the drive signal Sd should not be output when the drive current Id is outside the current range ΔId (Idth1>Id or Id>Idth2). Incidentally, for example, in the case of a wire breakage inside the drive device 41, etc., it becomes (Id<Idth1).

[0167] Furthermore, the detection (measurement) of such driving current Id and the aforementioned determination action can be performed, for example, on each nozzle hole Hn in the nozzle plate 112, or simultaneously on multiple nozzle hole Hn units.

[0168] (The function / effect of variations 1-3)

[0169] Through the above-described components, the following effects and functions can be achieved in variations 1 to 3, respectively.

[0170] First, in Modification 1, when the drive voltage Vd in the drive signal Sd is outside the predetermined voltage range (outside the aforementioned voltage range ΔVd), it is determined that the drive signal Sd should not be output, thus becoming as follows. That is, various countermeasures can be taken against malfunctions or damage to the inkjet head 1A caused by the drive signal Sd being outside the voltage range ΔVd (abnormal setting of the drive voltage Vd). As a result, the reliability of the inkjet head 1A can be improved by preventing a decrease in reliability caused by such abnormal drive voltage Vd.

[0171] Furthermore, in Modification 2, when the device temperature Td in the driving device 41 is outside the predetermined temperature range (outside the aforementioned temperature range ΔTd), a determination is made that the driving signal Sd should not be output, thus becoming as follows. That is, various countermeasures can be taken against the situation where the device temperature Td is outside the temperature range ΔTd (an abnormal state of device temperature Td), which could lead to malfunctions or damage to the inkjet head 1B. As a result, the reliability of the inkjet head 1B can be improved by preventing a decrease in reliability caused by such an abnormal state of device temperature Td (such as a malfunction in the cooling system of the driving device 41).

[0172] Furthermore, in Modification 3, when the drive current Id generated during ejection is outside the predetermined current range (outside the aforementioned current range ΔId), a determination is made that the drive signal Sd should not be output, resulting in the following: That is, various countermeasures can be taken against malfunctions or damage to the inkjet head 1C caused by the condition that the drive current Id is outside the current range ΔId (an abnormal state of the drive current Id). As a result, the reliability of the inkjet head 1C can be improved to prevent a decrease in reliability caused by such an abnormal state of the drive current Id (such as a short circuit in the ejection section 11 or a broken wire in the ejection section 11).

[0173] [Variation Example 4]

[0174] (constitute)

[0175] Figure 16 A block diagram illustrates a configuration example of the liquid ejection head (inkjet head 1D) involved in Modification 4. The inkjet head 1D of Modification 4 corresponds to: the inkjet head 1 in the embodiment (refer to...) Figure 4 In the process, an I / F substrate 12D is provided instead of an I / F substrate 12.

[0176] Furthermore, the inkjet head 1D corresponds to a specific example of the "liquid jet head" in this disclosure. Additionally, the printer equipped with this inkjet head 1D corresponds to a specific example of the "liquid jet recording apparatus" in this disclosure.

[0177] The I / F substrate 12D described above corresponds to: in the I / F substrate 12, a control device 120D is provided, which includes the determination unit 121D and the waveform storage unit 124 described below, instead of the control device 120 including the determination unit 121.

[0178] like Figure 16 As shown, the waveform storage unit 124 stores waveform setting information Iw supplied from the outside of the inkjet head 1D (print control unit 2). Such a waveform storage unit 124 is configured using various types of memory, such as EEPROM (Electrically Erasable Programmable Read-Only Memory).

[0179] In addition, when the determination unit 121D reads the waveform setting information Iw stored in such a waveform storage unit 124, it uses, for example, various methods described in the embodiments or variations 1 to 3 to determine whether the drive signal Sd should be output.

[0180] (Function / Effect)

[0181] Thus, in Modification 4, the waveform setting information Iw supplied from the outside of the inkjet head 1D (print control unit 2) is stored in the waveform storage unit 124, and when the stored waveform setting information Iw is read in the determination unit 121D, a determination is made as to whether the drive signal Sd should be output, resulting in the following.

[0182] That is, for users of the inkjet head 1D, for example, when the inkjet head 1D is started, they only need to pre-store the waveform setting information Iw in the waveform storage unit 124, and the above-mentioned determination can be performed automatically, so that the user does not feel the waiting time during the determination. In addition, with this configuration, for example, the waveform setting correction contained in the waveform setting information Iw can also be stored (overwritten and saved) in the waveform storage unit 124. Based on these facts, in this variation example 4, the reliability of the inkjet head 1D can be further improved while improving convenience.

[0183] Furthermore, for example, other setting information different from the waveform setting information Iw described above can be stored in the waveform storage unit 124 beforehand. Specifically, for example, the setting for measuring the drive current Id described in Modification 3 can be stored in the waveform storage unit 124 beforehand. In this case, this setting is written when the inkjet head 1D is manufactured, and when the user uses it, the setting for measuring the drive current Id is automatically performed, thus preventing the user from making incorrect settings. In addition, the waveform storage unit 124 can store, for example, information about the inkjet head 1D's start-up time or number of ejections. In this case, the user can obtain guidance on, for example, the replacement period of the inkjet head 1D.

[0184] [Variation Example 5]

[0185] (constitute)

[0186] Figure 17 A block diagram illustrates a configuration example of the liquid ejection head (inkjet head 1E) involved in Modification 5. The inkjet head 1E of this Modification 5 corresponds to: the inkjet head 1 in the embodiment (refer to...) Figure 4 In the process, an I / F substrate 12E is provided instead of an I / F substrate 12.

[0187] Furthermore, the inkjet head 1E corresponds to a specific example of the "liquid jet head" in this disclosure. Additionally, the printer equipped with this inkjet head 1E corresponds to a specific example of the "liquid jet recording apparatus" in this disclosure.

[0188] The aforementioned I / F substrate 12E corresponds to: in the I / F substrate 12, a control device 120E is provided, which includes the determination unit 121E and the waveform correction unit 125 described below, instead of the control device 120 including the determination unit 121.

[0189] When the determination unit 125 determines that a drive signal Sd should be output in the determination unit 121E, for example, using various methods described in embodiments or variations 1 to 3, it corrects the waveform setting information Iw to determine that a drive signal Sd should be output. That is, for example, it assumes that the waveform setting information Iw includes the aforementioned predetermined abnormal waveform setting (for example, referring to...). Figures 9 to 11 If the determination is that the drive signal Sd should not be output, the waveform correction unit 125 changes the abnormal waveform setting to the normal waveform setting (see reference). Figure 5 The waveform setting information Iw is corrected. Alternatively, for example, if the aforementioned drive voltage Vd, device temperature Td, drive current Id, etc., become values ​​outside the aforementioned predetermined range and a determination is made that the drive signal Sd should not be output, the waveform correction unit 125 corrects the waveform setting information Iw so that those values ​​are within the predetermined range.

[0190] Specifically, for example, when the drive current Id or the device temperature Td exceeds the aforementioned upper limit, the waveform correction unit 125 corrects the waveform setting information Iw to reduce the peak value in the drive voltage Vd. Alternatively, the waveform correction unit 125 corrects the waveform setting information Iw according to the control of the determination unit 121E, so that the drive voltage Vd converges to the range of voltage ΔVd. Furthermore, the drive waveform with the highest current consumption can be detected in advance, and when the drive current Id or the device temperature Td exceeds the aforementioned upper limit, the previously detected drive waveform is removed, thereby correcting the waveform setting information Iw.

[0191] (Function / Effect)

[0192] Thus, in Modification 5, when it is determined that the drive signal Sd should not be output, the waveform setting information Iw is corrected in the waveform correction unit 125 to determine that the drive signal Sd should be output. Therefore, by correcting the waveform setting information Iw to determine that the drive signal Sd should be output, malfunctions or damage to the inkjet head 1E can be effectively prevented, further improving the reliability of the inkjet head 1E.

[0193] [Variation Example 6]

[0194] (constitute)

[0195] Figure 18 A block diagram illustrates a configuration example of the liquid ejection head (inkjet head 1F) involved in Modification 6. The inkjet head 1F of Modification 6 corresponds to: the inkjet head 1 in the embodiment (refer to...) Figure 4 In the process, an I / F substrate 12F is provided instead of an I / F substrate 12, and a single flexible substrate 13 is provided instead of a plurality of flexible substrates 13a to 13d.

[0196] Furthermore, the inkjet head 1F corresponds to a specific example of the "liquid jet head" in this disclosure. Additionally, the printer equipped with the inkjet head 1F corresponds to a specific example of the "liquid jet recording apparatus" in this disclosure. Furthermore, the aforementioned flexible substrate 13 corresponds to a specific example of the "drive substrate" in this disclosure.

[0197] The aforementioned flexible substrate 13 has the same configuration as each of the flexible substrates 13a to 13d described in the embodiments.

[0198] The aforementioned I / F substrate 12F is provided with any one of the control devices 120, 120A to 120E described herein (see reference 120A to 120E) instead of the control device 120 in the I / F substrate 12. Figure 18 Furthermore, as explained above, these control devices 120, 120A to 120E each include at least one of the determination units 121, 121A to 121E (see reference). Figure 18 ).

[0199] Furthermore, this I / F substrate 12F differs from the I / F substrates 12A to 12E described so far. Along with the aforementioned configuration where a single flexible substrate 13 is provided, it is configured without (omitted) the control switching unit 122. Therefore, as... Figure 18 As shown, in the inkjet head 1F of this modified example 6, the printing control signal Sc and waveform setting information Iw are directly supplied to each driving device 41 in the flexible substrate 13 (without passing through the control switching unit 122).

[0200] (Function / Effect)

[0201] In this modified example 6, the same effect can be obtained essentially by means of the same function as the embodiments described so far and the modified examples 1 to 5.

[0202] <3. Other variations>

[0203] The above examples illustrate some implementation methods and variations of this disclosure, but this disclosure is not limited to these implementation methods and various variations are possible.

[0204] For example, in the above embodiments, specific examples of the configuration (shape, arrangement, number, etc.) of each component in the printer and inkjet head have been described, but the configuration is not limited to those described in the above embodiments, and other shapes, arrangements, numbers, etc. are also possible.

[0205] Specifically, examples of configurations of I / F substrates, flexible substrates (driving substrates), driving devices, and control devices have been described in the above embodiments, but these configurations are not limited to those described in the above embodiments. For example, examples of flexible substrates in the present disclosure have been given in the above embodiments, but non-flexible substrates may also be used in the present disclosure.

[0206] Furthermore, the numerical examples of various parameters described in the above embodiments are not limited to the numerical examples described in the embodiments, and may be other numerical values. In addition, the data configuration examples of the waveform setting information described in the above embodiments are not limited to the examples described in the above embodiments, and may be other data configurations.

[0207] Furthermore, the determination action, waveform setting information correction action, output stop action, and error information notification action described in the above embodiments are not limited to the action examples described in the above embodiments, and may be other action examples.

[0208] Specifically, additional determination functions (error detection functions) can be added to the determination unit. For example, the system can detect whether the user has made an incorrect setting within the driver 41, and if such an incorrect setting is detected, the ink ejection operation of the ink 9 can be forcibly stopped. For instance, although the operation is set via the setting pin of the driver 41, if the setting pin is not correctly set due to improper installation or impact during use, even if the correct setting for the inkjet head is set, it may not be desirable to drive as is. In this case, the driver 41 itself can detect a discrepancy between the setting performed in the driver and the appropriate drive waveform setting, and forcibly stop the ink ejection operation of the ink 9.

[0209] Furthermore, various types of inkjet heads can be used as the inkjet head structure. For example, it can be a so-called side-jet type inkjet head that ejects ink 9 from the center of each ejection channel in the extending direction of the actuator plate 111. Or, for example, it can be a so-called edge-jet type inkjet head that ejects ink 9 along the extending direction of each ejection channel. Furthermore, the printer method is not limited to the methods described in the above embodiments, and various methods such as MEMS (Micro Electro Mechanical Systems) methods can be used.

[0210] Furthermore, this disclosure can be applied to either a recirculating inkjet head that circulates ink 9 between the ink tank and the inkjet head, or a non-recirculating inkjet head that does not circulate ink 9.

[0211] Furthermore, the series of processes described in the above embodiments can be performed using hardware (circuit) or software (program). In the case of software, the software consists of a group of programs used to instruct the computer to perform various functions. Each program can be pre-loaded into the computer for use, or installed from a network or recording medium. Moreover, examples of recording media (non-transitory computer-readable recording media) that record such programs include FLOPPY discs, CD (Compact Disk)-ROMs, DVD (Digital Versatile Disc)-ROMs, and hard disks.

[0212] Furthermore, in the above embodiments, a printer (inkjet printer) has been described as a specific example of the "liquid jet recording apparatus" in this disclosure. However, this is not a limitation, and this disclosure can also be applied to other devices besides inkjet printers. In other words, the "liquid jet head" (inkjet head) of this disclosure can also be applied to other devices besides inkjet printers. Specifically, for example, the "liquid jet head" of this disclosure can also be applied to devices such as fax machines or on-demand printers.

[0213] Furthermore, the various examples described so far can be combined in any way and applied.

[0214] Furthermore, the effects described in this specification are merely illustrative and not limited to them; other effects may also be possible.

[0215] Alternatively, this disclosure may also take the following form.

[0216] (1) A control device for a liquid injection head having a jetting section for spraying liquid, comprising:

[0217] The determination unit determines whether the drive signal, which is generated by a drive device based on waveform setting information supplied from outside the liquid injection head, should be output to the injection unit.

[0218] (2) According to the control device described in (1) above, wherein,

[0219] If the waveform setting information includes a predetermined abnormal waveform setting, the determination unit determines that the drive signal should not be output.

[0220] (3) According to the control device described in (2) above, wherein,

[0221] The waveform setting information includes power supply potential value information, which specifies a selected power supply potential value from a plurality of power supply potential values ​​set along the time axis.

[0222] The plurality of power supply potential values ​​respectively include a reference potential value, a positive potential value, and an intermediate potential value between the reference potential value and the positive potential value.

[0223] The power supply potential value information in the waveform setting information includes a first abnormal waveform setting, which is a predetermined abnormal waveform setting and does not pass through the intermediate potential value during the transition between the reference potential value and the positive potential value.

[0224] The determination unit determines that the drive signal should not be output.

[0225] (4) The control device described in (2) or (3) above, wherein,

[0226] The waveform setting information includes power supply potential value information, which specifies a selected power supply potential value from a plurality of power supply potential values ​​set along the time axis.

[0227] The plurality of power supply potential values ​​respectively include a reference potential value, a positive potential value, and a negative potential value.

[0228] The power supply potential value information in the waveform setting information includes a second abnormal waveform setting, which is a predetermined abnormal waveform setting and does not pass through the reference potential value during the transition between the negative potential value and the positive potential value.

[0229] The determination unit determines that the drive signal should not be output.

[0230] (5) The control device described in any one of (2) to (4) above, wherein,

[0231] The waveform setting information includes power supply potential value information, which specifies a selected power supply potential value from a plurality of power supply potential values ​​set along the time axis.

[0232] Multiple power supply potential values, including at least a portion of the plurality of power supply potential values ​​and supply values ​​from different power lines.

[0233] If the power supply potential value information in the waveform setting information includes a third abnormal waveform setting, where the same type of power supply potential value among the various power supply potential values ​​is used more than a predetermined number of times within a unit period, and this is considered as the predetermined abnormal waveform setting.

[0234] The determination unit determines that the drive signal should not be output.

[0235] (6) The control device described in any one of (1) to (5) above, wherein,

[0236] When the driving voltage in the driving signal is a value outside the predetermined voltage range.

[0237] The determination unit determines that the drive signal should not be output.

[0238] (7) The control device described in any one of (1) to (6) above, wherein,

[0239] When the device temperature in the driving device is outside the predetermined temperature range.

[0240] The determination unit determines that the drive signal should not be output.

[0241] (8) The control device described in any one of (1) to (7) above, wherein,

[0242] When the driving current generated when the ejector is driven by the driving signal is outside a predetermined current range,

[0243] The determination unit determines that the drive signal should not be output.

[0244] (9) The control device according to any one of (1) to (8) above further comprises:

[0245] The waveform storage unit stores the waveform setting information supplied from outside the liquid injection head.

[0246] When the waveform setting information stored in the waveform storage section is read...

[0247] The determination unit determines whether the drive signal should be output.

[0248] (10) The control device described in any one of (1) to (9) above, wherein,

[0249] If it is determined that the drive signal should not be output...

[0250] The determination unit outputs a discharge stop signal to the driving device to stop the liquid from being ejected from the injection unit, and

[0251] An error notification is sent to the exterior of the liquid injection head.

[0252] (11) The control device according to any one of (1) to (10) above further comprises:

[0253] The waveform correction unit corrects the waveform setting information in a manner that determines the drive signal should not be output when the determination unit determines that the drive signal should be output.

[0254] (12) A liquid injection head, comprising:

[0255] The control device described in any of (1) to (11) above;

[0256] The jet section; and

[0257] One or more of the driving devices spray the liquid by applying the driving signal to the spray section.

[0258] (13) A liquid jet recording device, comprising:

[0259] The liquid injection head described in (12) above.

[0260] (14) A control program for a liquid jet head having a jetting section for spraying liquid, which causes a computer to execute:

[0261] A determination is made as to whether the drive signal, which is generated by a drive device based on waveform setting information supplied from outside the liquid injection head, should be output to the injection unit.

[0262] (15) A recording medium, being a non-transient computer-readable recording medium that records a control program applicable to a liquid jet head having a jetting section for ejecting liquid, which causes a computer to execute:

[0263] A determination is made as to whether the drive signal, which is generated by a drive device based on waveform setting information supplied from outside the liquid injection head, should be output to the injection unit.

[0264] [Label Explanation]

[0265] 1. 1A-1F Inkjet Heads; 10 Connector; 11 Jet Section; 111 Actuator Board; 112 Nozzle Board; 12. 12A-12F I / F Substrates; 120a, 120b, 120c, 120d Connectors; 120, 120A-120E Control Devices; 121, 121A-121E Decision Units; 122 Control Switching Unit; 123 Current Detection Unit; 124 Waveform Storage Unit; 125 Waveform Correction Unit; 13. 13a, 13b, 13c, 13d Flexible Substrates; 141, 142 Cooling Units; 2 Printing Control Unit; 3 Ink Reservoir; 30 Ink Supply Tube; 41 Drive Device; 433 Crimping Electrode; 5 Printer; 9 Ink; P Recording Paper; Hn Nozzle Orifice; Sc Printing Control Signal; Sst Ejection Stop Signal; Sd Drive signal; Vd drive voltage; Td device temperature; Id drive current; ΔVd voltage range; ΔTd temperature range; ΔId current range; Vdth1, Vdth2 threshold voltages; Tdth1, Tdth2 threshold temperatures; Idth1, Idth2 threshold currents; Ac circuit configuration area; Iw waveform setting information; Ie error information; V2 power supply potential value; V3 intermediate potential value information; t time; t10~t19, t21~t26 timing; ΔT unit period; ΔtP, ΔtPH period.

Claims

1. A control device for a liquid injection head having a jetting section for spraying liquid, comprising: The determination unit determines whether a drive signal based on waveform setting information supplied from outside the liquid injection head should be output to the injection unit by a drive device that generates the drive signal based on the waveform setting information. The waveform setting information includes power supply potential value information, which specifies a selected power supply potential value from a plurality of power supply potential values ​​set along the time axis. The plurality of power supply potential values ​​respectively include a reference potential value, a positive potential value, and an intermediate potential value between the reference potential value and the positive potential value. The power supply potential value information in the waveform setting information includes a first abnormal waveform setting, which is a predetermined abnormal waveform setting that does not pass through the intermediate potential value during the transition between the reference potential value and the positive potential value. The determination unit determines that the drive signal should not be output.

2. A control device for a liquid injection head having a jetting section for spraying liquid, comprising: The determination unit determines whether a drive signal based on waveform setting information supplied from outside the liquid injection head should be output to the injection unit by a drive device that generates the drive signal based on the waveform setting information. The waveform setting information includes power supply potential value information, which specifies a selected power supply potential value from a plurality of power supply potential values ​​set along the time axis. The plurality of power supply potential values ​​respectively include a reference potential value, a positive potential value, and a negative potential value. The power supply potential value information in the waveform setting information includes a second abnormal waveform setting, which is a predetermined abnormal waveform setting and does not pass through the reference potential value during the transition between the negative potential value and the positive potential value. The determination unit determines that the drive signal should not be output.

3. A control device for a liquid injection head having a jetting section for spraying liquid, comprising: The determination unit determines whether a drive signal based on waveform setting information supplied from outside the liquid injection head should be output to the injection unit by a drive device that generates the drive signal based on the waveform setting information. The waveform setting information includes power supply potential value information, which specifies a selected power supply potential value from a plurality of power supply potential values ​​set along the time axis. Multiple power supply potential values, including at least a portion of the plurality of power supply potential values ​​and supply values ​​from different power lines. If the power supply potential value information in the waveform setting information includes a third abnormal waveform setting, where the same type of power supply potential value among the various power supply potential values ​​is used more than a predetermined number of times within a unit period, and this is considered a predetermined abnormal waveform setting. The determination unit determines that the drive signal should not be output.

4. The control device according to any one of claims 1 to 3, wherein, When the driving voltage in the driving signal is a value outside the predetermined voltage range. The determination unit determines that the drive signal should not be output.

5. The control device according to any one of claims 1 to 3, wherein, When the device temperature in the driving device is outside the predetermined temperature range. The determination unit determines that the drive signal should not be output.

6. The control device according to any one of claims 1 to 3, wherein, When the driving current generated when the ejection unit is driven to eject based on the driving signal is a value outside the predetermined current range, The determination unit determines that the drive signal should not be output.

7. The control device according to any one of claims 1 to 3, further comprising: The waveform storage unit stores the waveform setting information supplied from outside the liquid injection head. When the waveform setting information stored in the waveform storage section is read... The determination unit determines whether the drive signal should be output.

8. The control device according to any one of claims 1 to 3, wherein, If the determination unit determines that the drive signal should not be output, then... The driving device outputs a discharge stop signal to stop the liquid from being ejected from the jet section, and An error notification is sent to the exterior of the liquid injection head.

9. The control device according to any one of claims 1 to 3, further comprising: The waveform correction unit corrects the waveform setting information in a manner that determines the drive signal should not be output when the determination unit determines that the drive signal should be output.

10. A liquid injection head, comprising: The control device according to any one of claims 1 to 9; The jet section; and One or more of the driving devices spray the liquid by applying the driving signal to the spray section.

11. A liquid jet recording device, comprising: The liquid jet head according to claim 10.

12. A control program for a liquid injection head having a jetting section for spraying liquid, which is executed by a computer: The system determines whether a drive signal based on waveform setting information supplied externally to the liquid injection head should be output to the injection unit by a drive device that generates the drive signal based on the waveform setting information. The waveform setting information includes power supply potential value information, which specifies a selected power supply potential value from a plurality of power supply potential values ​​set along the time axis. The plurality of power supply potential values ​​respectively include a reference potential value, a positive potential value, and an intermediate potential value between the reference potential value and the positive potential value. The power supply potential value information in the waveform setting information includes a first abnormal waveform setting, which is a predetermined abnormal waveform setting that does not pass through the intermediate potential value during the transition between the reference potential value and the positive potential value. The determination is made that the drive signal should not be output.

13. A control program for a liquid injection head having a jetting section for spraying liquid, which instructs a computer to execute: The system determines whether a drive signal based on waveform setting information supplied externally to the liquid injection head should be output to the injection unit by a drive device that generates the drive signal based on the waveform setting information. The waveform setting information includes power supply potential value information, which specifies a selected power supply potential value from a plurality of power supply potential values ​​set along the time axis. The plurality of power supply potential values ​​respectively include a reference potential value, a positive potential value, and a negative potential value. The power supply potential value information in the waveform setting information includes a second abnormal waveform setting, which is a predetermined abnormal waveform setting and does not pass through the reference potential value during the transition between the negative potential value and the positive potential value. The determination is made that the drive signal should not be output.

14. A control program for a liquid injection head having a jetting section for spraying liquid, which instructs a computer to execute: The system determines whether a drive signal based on waveform setting information supplied externally to the liquid injection head should be output to the injection unit by a drive device that generates the drive signal based on the waveform setting information. The waveform setting information includes power supply potential value information, which specifies a selected power supply potential value from a plurality of power supply potential values ​​set along the time axis. Multiple power supply potential values, including at least a portion of the plurality of power supply potential values ​​and supply values ​​from different power lines. If the power supply potential value information in the waveform setting information includes a third abnormal waveform setting, where the same type of power supply potential value among the various power supply potential values ​​is used more than a predetermined number of times within a unit period, and this is considered a predetermined abnormal waveform setting. The determination is made that the drive signal should not be output.

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