Ink-jet chip, piezoelectric nozzle and ink-jet printing system
By setting screening and flow-limiting structures in the flow channel of the inkjet chip, the problems of impurities and bubbles in the functional liquid are solved, and stable liquid supply to the injection hole and high-quality printing are achieved.
Patent Information
- Application Number
- CN202511116317.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-11
- Publication Date
- 2025-10-10
AI Technical Summary
Impurities in the functional fluid during inkjet printing can cause nozzle blockage and bubble generation, affecting print quality.
A screening structure and a flow-limiting structure are set in the flow channel of the inkjet chip. Impurities are filtered through the screening structure, and the flow of the functional liquid is controlled by the flow-limiting structure to ensure that there are no bubbles in the functional liquid in the storage section and independently control the liquid supply of each injection hole.
The liquid supply stability and controllability of the injection hole are improved, the nozzle blockage and bubble generation are reduced, and the printing quality is ensured.
Smart Images
Figure CN120756208A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of inkjet printing technology, and in particular to an inkjet chip, a piezoelectric nozzle, and an inkjet printing system. Background Art
[0002] Inkjet printing, a contactless, pressureless, and maskless technology for display device processing, can precisely apply tiny droplets (in the picoliter or femtoliter range) to the desired location. The solvent evaporates, dries, and solidifies to form a thin film. This makes it easy to create extremely high-resolution display devices, especially when processing large-scale panels. Conventionally, piezoelectric printheads are used for printing.
[0003] In the related technology, there is a accommodating cavity inside the chip, and multiple injection holes are opened at the bottom of the accommodating cavity. Functional liquid is supplied to the accommodating cavity of the chip through an ink cartridge. The functional liquid is stored in the accommodating cavity, and the piezoelectric structure on the chip controls the functional liquid to be ejected from the injection holes.
[0004] However, impurities inevitably exist within the functional liquid, and these impurities can be carried into the ink chamber as the functional liquid flows, potentially clogging the nozzles and adversely affecting print quality. Furthermore, after the functional liquid falls from the ink cartridge into the ink chamber, the drop in the liquid can easily create bubbles. This can lead to unwanted droplets during subsequent ejection, impacting print quality. Summary of the Invention
[0005] The embodiments of the present application provide an inkjet chip, a piezoelectric nozzle, and an inkjet printing system to solve the technical problems in related technologies in which impurities adversely affect printing quality and functional liquid easily generates bubbles, thereby adversely affecting printing quality.
[0006] In a first aspect, an inkjet chip is provided, comprising:
[0007] A plate body, wherein a plurality of flow channels are provided inside the plate body, and the flow channels include a liquid inlet section, a conveying section, and a storage section in the flow direction; the liquid inlet section is for the functional liquid to enter, and a through-spray hole is provided on the bottom wall of the storage section; a screening structure is provided in the conveying section, and the screening structure increases the area of the inner wall of the liquid inlet section in contact with the functional liquid;
[0008] a piezoelectric structure, the piezoelectric structure being arranged on the top surface of the plate body and comprising a plurality of active ends, the plurality of active ends acting on the plurality of storage segments respectively;
[0009] The functional liquid flows from the liquid inlet section to the conveying section, and then flows through the screening structure into the storage section. The active end of the piezoelectric structure causes the functional liquid in the storage section to be ejected from the injection hole.
[0010] In some embodiments, the screening structure includes at least one block, which is fixed in the conveying section and divides the inner channel of the conveying section into multiple paths, and the functional fluid is suitable for flowing through the multiple paths.
[0011] In some embodiments, a flow limiting structure is further provided in the conveying section. In the flow direction of the functional liquid, the screening structure and the flow limiting structure are arranged in sequence, and the flow limiting structure is used to limit the functional liquid from flowing back from the storage section to the conveying section; the flow limiting structure includes a flow limiting block, which is arranged at the outlet of the conveying section. The flow limiting block partially blocks the connection between the conveying section and the storage section, so that the cross-sectional area of the connection between the conveying section and the storage section is smaller than the cross-sectional area of the conveying section and the storage section.
[0012] In some embodiments, the flow limiting block is connected to the side wall of the conveying section, and the flow limiting block includes a guide slope, and the included angle between the guide slope and the side surface of the conveying section is an obtuse angle;
[0013] Wherein, in the flow direction of the functional fluid, the guiding slope of the flow limiting block causes the communication area between the conveying section and the storage section to gradually decrease.
[0014] In some embodiments, the bottom surface of the liquid inlet section is lower than the bottom surface of the conveying section, and the functional liquid accumulates in the liquid inlet section and then overflows into the conveying section.
[0015] In some embodiments, the plate body is further provided with a liquid inlet groove, which is opened on the top surface of the plate body, and the inlets of the liquid inlet sections of all the flow channels are connected to the liquid inlet groove, and the liquid inlet groove is suitable for connecting with an external ink supply mechanism, and the liquid inlet groove is suitable for storing the functional liquid.
[0016] In some embodiments, the inkjet chip further includes a heating component, wherein the heating component is laid on the liquid inlet groove of the plate body, and the heating component cover is arranged at the notch of the liquid inlet groove.
[0017] In some embodiments, a storage tank is sunken at the injection holes of the storage section, and the injection holes are opened at the bottom of the storage tank.
[0018] In some embodiments, the plate includes:
[0019] A top plate, wherein a sinking trough is provided on the bottom surface of the top plate, the conveying section and the storage section are both provided at the bottom of the sinking trough, and the liquid inlet section is provided at the bottom surface of the bottom plate;
[0020] A bottom plate, wherein a boss is formed on the top surface of the bottom plate, the boss is adapted to extend into the sinking trough, and the top surface of the boss is tightly against the bottom of the sinking trough, and the top surface of the boss constitutes the bottom wall of the conveying section and the storage section; the top surface of the bottom plate is tightly against the bottom surface of the top plate, and the top surface of the bottom plate constitutes the bottom wall of the liquid inlet section; the injection hole is provided on the boss; a plurality of connecting grooves are provided on one side surface of the boss;
[0021] Wherein, after the bottom plate and the top plate form the plate body, each of the liquid inlet sections is connected with the conveying section through the connecting groove.
[0022] In some embodiments, the sinking groove is opened in the middle of the top plate, so that the peripheral thickness of the top plate is greater than the middle thickness of the top plate.
[0023] The beneficial effects of the technical solution provided by this application include:
[0024] The present invention provides an inkjet chip in which a functional liquid is supplied to multiple ejection holes via multiple flow channels. The multiple active ends of a piezoelectric structure act on the functional liquid in different storage sections, causing the functional liquid to be ejected from the ejection holes. Because the flow channels corresponding to different ejection holes are independently configured, the liquid supply to each ejection hole does not affect each other, resulting in higher liquid supply stability. Furthermore, when the active end of the piezoelectric structure corresponding to a specific ejection hole is operating, adjacent ejection holes are less susceptible to crosstalk, resulting in higher controllability of the ejection holes and ensuring print quality.
[0025] The functional liquid passes through the liquid inlet section, the conveying section and the storage section in the flow channel. The functional liquid enters the conveying section after a steady flow in the liquid inlet section to reduce the possibility of bubbles in the functional liquid in the conveying section. The bubbles in the functional liquid are reduced through flow, ensuring that the functional liquid in the storage section does not have bubbles, thereby ensuring printing quality.
[0026] Furthermore, the placement of the screening structure within the delivery section diverts the functional liquid within the delivery section, ensuring that as the functional liquid passes through the screening structure, it comes into contact with the screening structure as much as possible. Impurities within the functional liquid are easily attached to the screening structure upon contact, thereby filtering out impurities. After the filtered and impurity-free functional liquid enters the storage section, it is less likely to clog the ejection orifice, ensuring normal printing. Furthermore, during the printing process, impurities are prevented from being printed onto the substrate, improving print quality.
[0027] In a second aspect, a piezoelectric nozzle is provided, comprising the inkjet chip as described above.
[0028] Another embodiment of the present application provides a piezoelectric nozzle. Since the piezoelectric nozzle includes the above-mentioned inkjet chip, the beneficial effects of the piezoelectric nozzle are consistent with the beneficial effects of the above-mentioned inkjet nozzle, which will not be repeated here.
[0029] In a third aspect, an inkjet printing system is provided, comprising the inkjet chip as described above, and / or the piezoelectric nozzle as described above.
[0030] Another embodiment of the present application provides an inkjet printing system. Since the inkjet printing system includes the above-mentioned piezoelectric nozzle and / or inkjet chip, the beneficial effects of the inkjet printing system are consistent with the beneficial effects of the above-mentioned piezoelectric nozzle and inkjet nozzle, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0032] Figure 1 A schematic diagram of an inkjet chip provided in an embodiment of the present application;
[0033] Figure 2 A schematic diagram of an inkjet chip provided in an embodiment of the present application from another perspective;
[0034] Figure 3 This is a schematic diagram of the internal structure of the inkjet chip provided in an embodiment of the present application;
[0035] Figure 4 An exploded view of the inkjet chip provided in an embodiment of the present application;
[0036] Figure 5 An exploded view of the inkjet chip provided in an embodiment of the present application from another perspective;
[0037] Figure 6 A schematic diagram of the interior of a top plate provided in an embodiment of the present application;
[0038] Figure 7 for Figure 6 Enlarged view of point A in the middle;
[0039] Figure 8 An exploded view of an inkjet chip provided in another embodiment of the present application;
[0040] Figure 9 A partial schematic diagram of the piezoelectric structure provided in an embodiment of the present application.
[0041] In the figure: 1. Plate body; 11. Top plate; 11a. Sinking trough; 12. Bottom plate; 12a. Boss; 12b. Connecting trough; 1a. Liquid inlet section; 1b. Conveying section; 1b1. Screening structure; 1b2. Current limiting structure; 1c. Storage section; 1d. Injection hole; 1e. Storage tank; 1f. Liquid inlet tank; 2. Piezoelectric structure; 21. First electrode; 22. Second electrode; 23. Piezoelectric film; 3. Heating component; 31. Support plate; 32. Heating wire. DETAILED DESCRIPTION
[0042] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0043] The present invention provides an inkjet chip, piezoelectric nozzle, and inkjet printing system. By providing a screening structure within the delivery section to trap impurities within the functional liquid, the functional liquid entering the storage section is purified, the likelihood of nozzle blockage is reduced, and print quality is guaranteed. This application addresses the technical issues in related technologies where impurities adversely affect print quality and the functional liquid is prone to bubbles, which adversely affect print quality.
[0044] Reference Figure 1 and Figure 2 An inkjet chip is used to eject functional fluid for printing. The inkjet chip includes a plate 1 and a piezoelectric structure 2. Plate 1 is mounted at the liquid outlet of an ink cartridge, which supplies ink to plate 1. Piezoelectric structure 2 is positioned on plate 1 and controls the ejection of the functional fluid within plate 1.
[0045] Reference Figure 1 、 Figure 3 and Figure 4 The plate body 1 is internally provided with multiple flow channels, arranged in parallel and spaced apart. The inlet of the flow channel communicates with the external ink cartridge, and the bottom wall of the flow channel at the outlet is provided with a spray hole 1d. The piezoelectric structure 2 acts on the functional liquid in the spray hole 1d, causing the functional liquid to be ejected from the spray hole 1d.
[0046] With this arrangement, multiple flow channels are arranged independently, the functional liquid in each flow channel has better flow stability, and crosstalk is less likely to occur between the flow channels, thereby ensuring the stability of ink supply to each injection hole 1d and ensuring printing quality.
[0047] Reference Figure 1 、 Figure 3 and Figure 4Furthermore, the piezoelectric structure 2 is arranged on the top surface of the plate 1, and the piezoelectric structure 2 includes multiple active ends, and the multiple active ends of the piezoelectric structure 2 act on different flow channels respectively.
[0048] With this arrangement, by individually controlling different flow channels, when the active end of the piezoelectric structure 2 corresponding to a specific ejection hole 1d works, the adjacent ejection holes 1d are less susceptible to crosstalk, and the ejection holes 1d are more controllable, thereby ensuring printing quality.
[0049] Reference Figures 3-5 The flow channel includes, in order, an inlet section 1a, a delivery section 1b, and a storage section 1c, along the direction of functional fluid flow. After entering the inlet section 1a, the functional fluid flows to the delivery section 1b, and then to the storage section 1c. The injection hole 1d is located within the storage section 1c, near the end of the storage section 1c facing away from the delivery section 1b. The active end of the piezoelectric structure 2 acts on the delivery section 1b.
[0050] Reference Figures 3-5 In this arrangement, the functional liquid passes through the liquid inlet section 1a, the conveying section 1b and the storage section 1c in the flow channel. The functional liquid enters the conveying section 1b after a steady flow in the liquid inlet section 1a, so as to reduce the possibility of bubbles in the functional liquid in the conveying section 1b, and reduce the bubbles in the functional liquid through flow, ensuring that the functional liquid in the storage section 1c does not have bubbles, thereby ensuring printing quality.
[0051] Reference Figures 3-5 The conveying section 1b is provided with a screening structure 1b1, which constitutes the internal structure of the conveying section 1b and forms part of the inner wall of the conveying section 1b. The screening structure 1b1 increases the area of the inner wall of the liquid inlet section 1a in contact with the functional liquid.
[0052] Therefore, as the functional liquid flows through screening structure 1b1, it diverts and diverts the functional liquid within delivery section 1b, ensuring that the functional liquid comes into contact with screening structure 1b1 as much as possible. Impurities within the functional liquid are easily attached to screening structure 1b1 upon contact, thereby filtering out the impurities. After the filtered and impurity-free functional liquid enters storage section 1c, it is less likely to clog ejection holes 1d, ensuring normal printing. Furthermore, impurities are prevented from being printed onto the substrate during printing, improving print quality.
[0053] Reference Figures 4-7 Specifically, the screening structure 1b1 includes at least one block fixed within the conveying section 1b. The block divides the interior of the conveying section 1b into multiple paths through which the functional fluid flows. This diversion reduces the flow path of each functional fluid stream, allowing more functional fluid to contact the inner wall of the conveying section 1b.
[0054] In this embodiment, when only one stopper is provided, it is positioned in the middle of the width of conveying section 1b to divide it into two paths. When multiple stoppers are provided, they are spaced apart across the width of conveying section 1b. Multiple rows of stoppers can be arranged in the conveying direction of conveying section 1b, with each row staggered in the conveying direction of conveying section 1b to create a path for the functional fluid to pass through. This increases the area of contact with the functional fluid.
[0055] In this embodiment, the stopper is formed at the same time as the conveying section 1b is formed. In this embodiment, the flow channel is processed by etching, and the stopper structure is reserved during the flow channel processing, so that the flow channel and the screening structure 1b1 are formed at the same time.
[0056] By arranging the block in this way, the contact area with the functional liquid is increased, the adhesion rate of impurities is improved, and the entry of impurities into the storage section 1c is greatly reduced to ensure printing quality.
[0057] Reference Figures 4-7 The conveying section 1b also includes a flow-limiting structure 1b2. The screening structure 1b1 and the flow-limiting structure 1b2 are arranged sequentially in the direction of the functional fluid flow. After passing through the screening structure 1b1, the functional fluid passes through the flow-limiting structure 1b2. The flow-limiting structure 1b2 is located at the junction between the conveying section 1b and the storage section 1c. After passing through the conveying section 1b, the functional fluid enters the storage section 1c.
[0058] The flow limiting structure 1b2 is used to limit the backflow of the functional liquid from the storage section 1c to the delivery section 1b, thereby maintaining the functional liquid content in the storage section 1c and ensuring a stable ink supply to the ejection holes 1d. It also prevents the backflow of the functional liquid from causing turbulent flow of the functional liquid and generating bubbles.
[0059] Specifically, the flow limiting structure 1b2 includes a flow limiting block, which is arranged at the outlet of the conveying section 1b. The flow limiting block partially blocks the connection between the conveying section 1b and the storage section 1c, so that the cross-sectional area of the connection between the conveying section 1b and the storage section 1c is smaller than the cross-sectional area of the conveying section 1b and the storage section 1c.
[0060] In this way, the connection area between the delivery section 1b and the storage section 1c is reduced by arranging the flow limiting block. Due to the pressure difference, the functional liquid in the delivery section 1b will pass through the flow limiting structure 1b2 and enter the storage section 1c, making it easier for the functional liquid in the flow channel to flow into the storage section 1c, so as to maintain a stable ink supply to the injection hole 1d.
[0061] In addition, since the functional liquid gradually enters the conveying section 1b and then enters the storage section 1c, the functional liquid in the storage section 1c is not easy to flow back into the conveying section 1b under the action of the flow limiting structure 1b2. The flow of the functional liquid is not easy to be turbulent, which avoids the generation of bubbles and maintains the total amount of functional liquid in the storage section 1c, thereby ensuring the printing quality.
[0062] Reference Figures 4-7 In this embodiment, the flow restrictor is connected to the sidewall of the conveying section 1b and includes a guiding slope, which forms an obtuse angle with the side of the conveying section 1b. In the direction of functional fluid flow, the guiding slope of the flow restrictor gradually reduces the connecting area between the conveying section 1b and the storage section 1c.
[0063] This arrangement gradually reduces the area of communication between the delivery section 1b and the storage section 1c. This prevents the functional liquid in the delivery section 1b from being directly blocked when entering the storage section 1c, preventing collisions and backflow, thereby preventing bubbles in the functional liquid. This allows the functional liquid to enter the storage section 1c more smoothly, resulting in a more stable ink supply to the ejection orifices 1d.
[0064] In this embodiment, the flow limiting block is formed at the same time as the conveying section 1b is formed. In this embodiment, the flow channel is processed by etching process, and the structure of the flow limiting block is reserved during the flow channel processing, so that the flow channel and the flow limiting structure 1b2 are formed together.
[0065] The bottom surface of the liquid inlet section 1a is lower than the bottom surface of the conveying section 1b, and the functional liquid accumulates in the liquid inlet section 1a and then overflows into the conveying section 1b.
[0066] With this arrangement, once the functional liquid in the liquid inlet section 1a accumulates to a certain height, it overflows from the liquid inlet section 1a and flows into the delivery section 1b. The functional liquid then enters the delivery section 1b from the bottom until it accumulates within the delivery section 1b. Therefore, bubbles are less likely to form when the functional liquid enters the delivery section 1b, ensuring the quality of the functional liquid entering the ejection orifice 1d and, consequently, ensuring printing quality.
[0067] Reference Figures 4-7 Optionally, the plate body 1 further defines a liquid inlet groove 1f, which is disposed on the top surface of the plate body 1 and aligns its length with the arrangement of the multiple flow channels. The inlets of the liquid inlet sections 1a of all flow channels are connected to the liquid inlet groove 1f. The liquid inlet groove 1f is adapted to communicate with an external ink supply mechanism and store functional liquid. In this embodiment, an external ink cartridge delivers the functional liquid into the liquid inlet groove 1f, from which it then enters the various flow channels.
[0068] Specifically, the liquid inlet groove 1f is opened on the top surface of the plate body 1 so as to be suitable for communicating with the external ink cartridge.
[0069] With this arrangement, after the functional liquid enters the liquid inlet tank 1f, the functional liquid fills the liquid inlet tank 1f, and after the functional liquid stabilizes in the liquid inlet tank 1f, it evenly enters each flow channel, facilitating synchronous and stable liquid supply to multiple flow channels.
[0070] Reference Figures 4-7Furthermore, the inkjet chip also includes a heating component 3, which is laid on the liquid inlet groove 1f of the plate body 1, and the heating component 3 is covered at the notch of the liquid inlet groove 1f.
[0071] With this arrangement, the functional liquid in the liquid inlet tank 1f is heated by the heating component 3 so that the functional liquid is at a working temperature required for printing, thereby ensuring printing quality.
[0072] In this embodiment, the heating assembly 3 includes a support plate 31 and a heating wire 32. The support plate 31 covers the notch of the liquid inlet tank 1f, and the heating wire 32 is laid on the support plate 31.
[0073] With this arrangement, the functional liquid in the liquid inlet tank 1f can be heated by the heating wire 32. In addition, since the heating component 3 is arranged at the liquid inlet tank 1f, the heating component 3 does not affect the piezoelectric structure 2, and the normal operation of the piezoelectric structure 2 is ensured.
[0074] In this embodiment, the support plate 31 and the liquid inlet groove 1f are integrally etched and formed.
[0075] Among them, a storage tank 1e is sunken at the injection hole 1d of the storage section 1c, and the injection hole 1d is opened at the bottom of the storage tank 1e.
[0076] In this configuration, the functional liquid is collected by arranging the storage tank 1e, ensuring that the functional liquid is filled in the ejection hole 1d, thereby ensuring the printing quality.
[0077] Reference Figures 4-7 The board body 1 is composed of two parts, a top plate 11 and a bottom plate 12. The bottom surface of the top plate 11 is bonded to the top surface of the bottom plate 12. In this embodiment, the top plate 11 and the bottom plate 12 are bonded together using gold-tin bonding. This separate configuration facilitates the processing of the two parts of the board body 1.
[0078] The bottom surface of the top plate 11 is provided with a sink trough 11a. The conveying section 1b and storage section 1c are both located at the bottom of the sink trough 11a. The liquid inlet section 1a is located on the bottom surface of the bottom plate 12. This ensures that the bottom surface of the liquid inlet section 1a is lower than the bottom surface of the conveying section 1b. The liquid inlet trough 1f extends through the top plate 11.
[0079] A boss 12a is formed on the top surface of the bottom plate 12. This boss 12a extends into the sink trough 11a and abuts against the bottom of the sink trough 11a. The top surface of boss 12a forms the bottom wall of the conveying section 1b and the storage section 1c. The top surface of the bottom plate 12 abuts against the bottom surface of the top plate 11, forming the bottom wall of the liquid inlet section 1a. The injection hole 1d is formed in the boss 12a.
[0080] A plurality of communication grooves 12b are provided on one side of the boss 12a. After the bottom plate 12 and the top plate 11 form the plate body 1, each liquid inlet section 1a is connected to the conveying section 1b through the communication groove 12b.
[0081] With this arrangement, the top plate 11 and bottom plate 12 are combined to form the main body 1. By machining various structures on the surfaces of the top plate 11 and bottom plate 12, and then bonding the top plate 11 and bottom plate 12 together, structures such as the flow channel within the main body 1 can be formed. This facilitates the processing and forming of the main body 1, allowing it to be formed through an etching process. Furthermore, it facilitates the separate manufacture of the top plate 11 and bottom plate 12, improving the production efficiency of the plate 1 and enabling mass production of the plate 1.
[0082] In this embodiment, the top plate 11 and the bottom plate 12 are both silicon plates.
[0083] Reference Figure 8 , wherein the sinking groove 11a can be opened on the bottom surface of the top plate 11 so that the bottom surface of the top plate 11 is arranged in a step shape.
[0084] Reference Figures 4-7 In this embodiment, the sinking groove 11 a is opened in the middle of the top plate 11 , so that the peripheral thickness of the top plate 11 is greater than the middle thickness of the top plate 11 .
[0085] This arrangement improves the strength of the top plate 11 , makes the top plate 11 easier to process and less prone to deformation, and improves the yield rate of the plate body 1 production.
[0086] Reference Figure 1 and Figure 9 , wherein the piezoelectric structure 2 includes a vibration plate, a first electrode 21 , a plurality of piezoelectric films 23 and a plurality of second electrodes 22 .
[0087] The vibration plate is a part of the top plate 11 of the plate body 1 , that is, after the top plate is provided with a storage section, the portion from the top wall of the storage section to the surface of the top plate is the vibration plate.
[0088] The first electrode 21 covers and is fixed to the surface of the vibration plate. Multiple piezoelectric films 23 are connected to the surface of the first electrode 21, and each of the piezoelectric films 23 is located directly above each of the storage segments 1c. Multiple second electrodes 22 are connected to the surfaces of the piezoelectric films 23. The piezoelectric films 23 form the active ends of the piezoelectric structure 2, and each of the piezoelectric films 23 acts on each of the storage segments 1c.
[0089] With this configuration, the piezoelectric film 23 is powered by the first electrode 21 and the second electrode 22. Different piezoelectric films 23 are activated by individually controlling different second electrodes 22. The piezoelectric films 23 vibrate the diaphragm, squeezing the functional liquid within the storage section 1c and ejecting it from the ejection hole 1d.
[0090] In addition, only one first electrode 21 is provided to power multiple piezoelectric films 23, which simplifies the power supply structure of the piezoelectric film 23 and facilitates the processing of the piezoelectric structure 2. In other embodiments, multiple first electrodes 21 are provided, and each piezoelectric film 23 corresponds to one first electrode 21.
[0091] The present embodiment provides an inkjet chip in which functional liquid is supplied to multiple ejection holes 1d via multiple flow channels. The multiple active ends of the piezoelectric structure 2 act on the functional liquid in different storage sections 1c, causing the functional liquid to be ejected from the ejection holes 1d. Because the flow channels corresponding to different ejection holes 1d are independently configured, the liquid supply to each ejection hole 1d does not affect each other, resulting in higher liquid supply stability. Furthermore, when the active end of the piezoelectric structure 2 corresponding to a specific ejection hole 1d is operating, adjacent ejection holes 1d are less susceptible to crosstalk, making the ejection holes 1d more controllable and ensuring print quality.
[0092] The functional liquid passes through the liquid inlet section 1a, the conveying section 1b and the storage section 1c in the flow channel. The functional liquid enters the conveying section 1b after a steady flow in the liquid inlet section 1a to reduce the possibility of bubbles in the functional liquid in the conveying section 1b, and reduces the bubbles in the functional liquid through flow, ensuring that the functional liquid in the storage section 1c does not have bubbles, thereby ensuring printing quality.
[0093] Furthermore, the arrangement of the screening structure 1b1 within the conveying section 1b diverts the functional liquid within the conveying section 1b. This ensures that as the functional liquid flows through the screening structure 1b1, it comes into contact with the screening structure 1b1 as much as possible. Impurities in the functional liquid are easily attached to the screening structure 1b1 upon contact, thereby filtering out the impurities. After the filtered and impurity-free functional liquid enters the storage section 1c, it is less likely to clog the ejection orifice 1d, ensuring normal printing. Furthermore, during the printing process, impurities are prevented from being printed onto the substrate, improving print quality.
[0094] Another embodiment of the present application provides a piezoelectric nozzle, comprising the inkjet chip as described above.
[0095] Another embodiment of the present application provides a piezoelectric nozzle. Since the piezoelectric nozzle includes the above-mentioned inkjet chip, the beneficial effects of the piezoelectric nozzle are consistent with the beneficial effects of the above-mentioned inkjet nozzle, which will not be repeated here.
[0096] Another embodiment of the present application provides an inkjet printing system, including the inkjet chip described above, and / or the piezoelectric nozzle described above.
[0097] Another embodiment of the present application provides an inkjet printing system. Since the inkjet printing system includes the above-mentioned piezoelectric nozzle and / or inkjet chip, the beneficial effects of the inkjet printing system are consistent with the beneficial effects of the above-mentioned piezoelectric nozzle and inkjet nozzle, which will not be repeated here.
[0098] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.
[0099] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.
[0100] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.
Claims
1. An inkjet chip, characterized in that: It includes: A plate body, wherein a plurality of flow channels are provided inside the plate body, and the flow channels include a liquid inlet section, a conveying section, and a storage section in the flow direction; the liquid inlet section is for the functional liquid to enter, and a through-spray hole is provided on the bottom wall of the storage section; a screening structure is provided in the conveying section, and the screening structure increases the area of the inner wall of the liquid inlet section in contact with the functional liquid; a piezoelectric structure, the piezoelectric structure being arranged on the top surface of the plate body and comprising a plurality of active ends, the plurality of active ends acting on the plurality of storage segments respectively; The functional liquid flows from the liquid inlet section to the conveying section, and then flows through the screening structure into the storage section. The active end of the piezoelectric structure causes the functional liquid in the storage section to be ejected from the injection hole.
2. The inkjet chip according to claim 1, characterized in that: The screening structure includes at least one block, which is fixed in the conveying section and divides the inner channel of the conveying section into multiple paths. The functional fluid is suitable for flowing through the multiple paths.
3. The inkjet chip according to claim 1, characterized in that: A flow limiting structure is also provided in the conveying section. In the flow direction of the functional liquid, the screening structure and the flow limiting structure are arranged in sequence, and the flow limiting structure is used to limit the functional liquid from flowing back from the storage section to the conveying section; the flow limiting structure includes a flow limiting block, which is arranged at the outlet of the conveying section. The flow limiting block partially blocks the connection between the conveying section and the storage section, so that the cross-sectional area of the connection between the conveying section and the storage section is smaller than the cross-sectional area of the conveying section and the storage section.
4. The inkjet chip according to claim 1, characterized in that: The flow limiting block is connected to the side wall of the conveying section, and the flow limiting block includes a guiding inclined surface, and the included angle between the guiding inclined surface and the side surface of the conveying section is an obtuse angle; Wherein, in the flow direction of the functional fluid, the guiding slope of the flow limiting block causes the communication area between the conveying section and the storage section to gradually decrease.
5. The inkjet chip according to claim 1, characterized in that: The bottom surface of the liquid inlet section is lower than the bottom surface of the conveying section, and the functional liquid accumulates in the liquid inlet section and then overflows into the conveying section.
6. The inkjet chip according to claim 1, characterized in that: The plate body is also provided with a liquid inlet groove, which is opened on the top surface of the plate body. The inlets of the liquid inlet sections of all the flow channels are connected to the liquid inlet groove. The liquid inlet groove is suitable for connecting with an external ink supply mechanism, and the liquid inlet groove is suitable for storing the functional liquid.
7. The inkjet chip according to claim 6, characterized in that: It also includes a heating component, which is laid on the liquid inlet groove of the plate body, and the heating component cover is arranged at the notch of the liquid inlet groove.
8. The inkjet chip according to claim 1, characterized in that: A storage tank is sunken and arranged at the injection holes of the storage section, and the injection holes are opened at the bottom of the storage tank.
9. The inkjet chip according to any one of claims 1 to 7, characterized in that: The plate body comprises: A top plate, wherein a sinking trough is provided on the bottom surface of the top plate, the conveying section and the storage section are both provided at the bottom of the sinking trough, and the liquid inlet section is provided at the bottom surface of the bottom plate; A bottom plate, wherein a boss is formed on the top surface of the bottom plate, the boss is adapted to extend into the sinking trough, and the top surface of the boss is tightly against the bottom of the sinking trough, and the top surface of the boss constitutes the bottom wall of the conveying section and the storage section; the top surface of the bottom plate is tightly against the bottom surface of the top plate, and the top surface of the bottom plate constitutes the bottom wall of the liquid inlet section; the injection hole is provided on the boss; a plurality of connecting grooves are provided on one side surface of the boss; Wherein, after the bottom plate and the top plate form the plate body, each of the liquid inlet sections is connected with the conveying section through the connecting groove.
10. The inkjet chip according to claim 9, characterized in that: The sinking groove is opened in the middle of the top plate, so that the peripheral thickness of the top plate is greater than the middle thickness of the top plate.
11. A piezoelectric nozzle, characterized in that: The invention comprises the inkjet chip according to any one of claims 1 to 10.
12. An inkjet printing system, characterized in that: Comprising the inkjet chip according to any one of claims 1 to 10, and / or the piezoelectric nozzle according to claim 11.