CN114068850A - Substrate for ink-jet printing and preparation method and application thereof - Google Patents
Substrate for ink-jet printing and preparation method and application thereof Download PDFInfo
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- CN114068850A CN114068850A CN202011452582.9A CN202011452582A CN114068850A CN 114068850 A CN114068850 A CN 114068850A CN 202011452582 A CN202011452582 A CN 202011452582A CN 114068850 A CN114068850 A CN 114068850A
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/10—Deposition of organic active material
- H10K71/12—Deposition of organic active material using liquid deposition, e.g. spin coating
- H10K71/13—Deposition of organic active material using liquid deposition, e.g. spin coating using printing techniques, e.g. ink-jet printing or screen printing
- H10K71/135—Deposition of organic active material using liquid deposition, e.g. spin coating using printing techniques, e.g. ink-jet printing or screen printing using ink-jet printing
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
Abstract
The invention relates to a substrate for ink-jet printing and a preparation method and application thereof. The substrate for inkjet printing includes a substrate main body, an atmosphere solvent groove, and a solvent blocking member. The substrate body is divided into an effective display area and a non-effective display area located at the periphery of the effective display area. The ambient solvent recess extends from the edge of the active display area to the inactive display area. The groove wall of the atmosphere solvent groove far away from the effective display area forms a drainage wall, the drainage wall extends from the direction of the groove bottom far away from the atmosphere solvent groove to form a solvent blocking part, and the solvent blocking part protrudes out of the effective display area. The substrate for ink-jet printing can improve the uniformity of film formation at the edge of an effective display area, and reduce the thickness of a frame of display equipment under the condition of ensuring good edge display effect.
Description
Technical Field
The invention relates to the technical field of ink-jet printing, in particular to a substrate for ink-jet printing and a preparation method and application thereof.
Background
Inkjet printing is one of the common methods for manufacturing functional devices, and the main step is to fill the pixel units with ink materials to obtain corresponding functional layers. For example, in a manufacturing process of an Organic Light Emitting Diode (OLED) or quantum dot light emitting diode (QLED) device, inkjet printing may be used to inject corresponding functional material ink into a pixel unit to prepare a Hole Injection Layer (HIL), a Hole Transport Layer (HTL), an emission layer material (EML), and the like. As one form of inkjet printing, as shown in fig. 1, droplets 101 of functional material are injected into pixel cells 301 by an inkjet print head 100, and then dried to form films, and the corresponding functional layers are formed in the pixel cells.
In the ink-jet printing process, obtaining a uniform film layer is an important research point of the process. When the conventional dry film formation method is used, as shown in fig. 2, a film formation unevenness area 201 occurs at the edge of the substrate 200, which may adversely affect the performance of the subsequent functional device.
Disclosure of Invention
Based on this, there is a need for a substrate for inkjet printing, a method for preparing the same and applications thereof. Through the structure design to the base plate for at the inkjet printing in-process, can carry out effective control to the direction of volatilizing and the speed of volatilizing of the solvent at base plate edge, improve the homogeneity of base plate edge function material film forming.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a substrate for inkjet printing includes a substrate body, an ambient solvent recess, and a solvent barrier; the substrate main body is divided into an effective display area and a non-effective display area positioned at the periphery of the effective display area; the ambient solvent groove extends from the edge of the active display area to the inactive display area; the atmosphere solvent recess is kept away from the cell wall of effective display area forms the drainage wall, the drainage wall extends from the direction of keeping away from the cell bottom of atmosphere solvent recess and forms the solvent stops, the solvent stops protrusion in effective display area.
In one embodiment, the included angle formed by the drainage wall and the groove bottom of the atmosphere solvent groove is 90-120 degrees; and/or the presence of a gas in the gas,
and an included angle formed between the groove wall of the atmosphere solvent groove close to the effective display area and the effective display area is 90-120 degrees.
In one embodiment, the drainage wall abuts against a wall of the ambient solvent groove near the active display area.
In one embodiment, the height of the solvent barrier protruding from the effective display area is 1 μm to 3 μm.
In one embodiment, the groove bottom of the atmosphere solvent groove has a height from the effective display area of 1 μm to 2 μm.
In one embodiment, the minimum distance between the groove wall of the atmosphere solvent groove close to the effective display area and the pixel unit in the effective display area is 20-50 μm.
In one embodiment, the groove bottom and the groove wall of the ambient solvent groove are provided with a hydrophilic enhancement layer.
A method of preparing a substrate for ink jet printing, comprising the steps of:
dividing a substrate main body into an effective display area and a non-effective display area, and enabling the non-effective display area to be located at the periphery of the effective display area;
forming an atmosphere solvent groove at the edge of the effective display area, and extending the atmosphere solvent groove from the edge of the effective display area to the non-effective display area;
and extending the groove wall of the atmosphere solvent groove far away from the effective display area from the direction far away from the groove bottom to form a solvent barrier.
A method of preparing a substrate for ink jet printing, comprising the steps of:
performing thickness modification treatment on the substrate main body to obtain a substrate main body with a preset thickness;
dividing the substrate main body with the preset thickness into an effective display area and a non-effective display area, and enabling the non-effective display area to be located on the periphery of the effective display area;
forming an atmosphere solvent groove on the substrate main body with the preset thickness, enabling the atmosphere solvent groove to extend from the edge of the effective display area to the non-effective display area, and enabling the atmosphere solvent groove to be far away from the groove wall of the effective display area to extend from the direction far away from the groove bottom of the effective display area to form a solvent stop piece.
A display, comprising the substrate described in any of the above embodiments or the substrate obtained by the preparation method described in any of the above embodiments, and a housing; the substrate is mounted to the housing for serving as a display panel of the display.
The substrate for inkjet printing according to the present invention includes a substrate main body, an atmospheric solvent groove, and a solvent blocking member. The substrate body is divided into an effective display area and a non-effective display area located at the periphery of the effective display area. The ambient solvent recess extends from the edge of the active display area to the inactive display area. The groove wall of the atmosphere solvent groove far away from the effective display area forms a drainage wall, the drainage wall extends from the direction of the groove bottom far away from the atmosphere solvent groove to form a solvent blocking part, and the solvent blocking part protrudes out of the effective display area. The inventor designs the structure of the substrate, sets an atmosphere solvent groove at the edge of the effective display area of the substrate main body, extends a drainage wall of the atmosphere solvent groove to form a solvent blocking part, and the solvent blocking part protrudes out of the effective display area. Therefore, the volatilization direction and the volatilization speed of the solvent at the edge of the substrate can be effectively controlled, and the film forming uniformity of the functional material at the edge of the substrate is improved. Specifically, by designing the structure of the substrate and by the matching action of the atmosphere solvent groove and the solvent blocking part, when the solvent is volatilized, the atmosphere solvent is filled in the atmosphere solvent groove, so that the vapor concentration outside the pixel unit can be improved, the pressure intensity at two sides of the pixel unit is balanced, the solvent of the pixel unit at the edge of the effective display area cannot deviate towards the outside of the pixel unit when being volatilized, and the uniformity of film forming at the edge of the effective display area can be effectively improved. In addition, the solvent barrier piece has the speed reduction and drainage functions on the volatilized solvent, so that the solvent in the pixel unit can be further prevented from being volatilized and deposited in a region outside the pixel unit, and the uniformity of film forming at the edge of the effective display region is further improved.
Further, as the demand for narrowing the display device is becoming more and more popular, the demand for narrowing the display device by consumers is becoming higher and the narrowing is becoming a mainstream trend of the display device. Since the conventional method has a defect that it is difficult to uniformly form a film on the edge of the substrate, the edge display effect of the substrate is poor when the substrate obtained by the conventional method is mounted on a display device. If a narrow-sided design is required, a problem arises in that the edges of the display area are poorly displayed. This problem can be solved well by using the substrate for inkjet printing of the present invention. Due to the existence of the atmosphere solvent groove and the solvent barrier in the substrate for ink-jet printing, the solvent in the pixel unit at the edge of the effective display area can be effectively prevented from being volatilized and deposited outside the pixel unit. Therefore, the display effect of the edge of the effective display area can be kept, and the thickness of the frame of the display equipment is reduced under the condition that the good edge display effect is ensured.
Drawings
FIG. 1 is a schematic diagram of an inkjet printhead injecting ink drops into a pixel cell according to the background of the invention;
FIG. 2 is a schematic structural diagram illustrating non-uniform film formation of a functional material on the edge of a substrate according to the background art of the present invention;
FIG. 3 is a schematic view of a substrate for inkjet printing according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view at A-A of the corresponding substrate for ink-jet printing of FIG. 3;
FIG. 5 is a cross-sectional view A-A of a substrate for ink jet printing according to another embodiment of the present invention;
fig. 6 is a schematic view illustrating solvent evaporation when the substrate for inkjet printing corresponding to fig. 3 is dried.
The notation in the figure is:
100. an inkjet print head; 101. droplets of functional material; 200. a substrate; 201. a film formation non-uniform region; 300. a substrate main body; 310. an active display area; 320. a non-active display area; 301. a pixel unit; 302. omission of other pixel cells; 303. an atmosphere solvent groove; 3031. a drainage wall; 304. a solvent barrier; 400. a condensation drainage plate; 401. the volatilization direction of the solvent in the pixel unit; 402. and (4) volatilizing the solvent in the atmosphere.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 3 and 4, an embodiment of the invention provides a substrate for inkjet printing, including a substrate main body 300, an ambient solvent groove 303, and a solvent blocking member 304; the substrate main body 300 is divided into an effective display region 310 and a non-effective display region 320 located at the periphery of the effective display region 310; the ambient solvent groove 303 extends from the edge of the active display area 310 to the inactive display area 320; the wall of the ambient solvent groove 303 away from the effective display region forms a drain wall 3031, the drain wall 3031 extends from the direction away from the groove bottom of the ambient solvent groove 303 to form a solvent stopper 304, and the solvent stopper 304 protrudes from the effective display region 310.
It is understood that in the effective display area of the substrate for ink-jet printing, a plurality of pixel units 301 are distributed in a dot matrix, and the omission 302 of other pixel units is indicated by dots in the figure for convenience of display and explanation. It will be appreciated that the omission 302 of other pixel cells also actually represents the corresponding pixel cell 301. The protrusion of the solvent barrier 304 from the effective display area in the present invention means: the solvent stopper 304 is disposed to protrude from the entire effective display area 310 by a certain height in the height direction of the effective display area 310, that is, the height of the solvent stopper 304 is greater than the height of the effective display area 310.
In this embodiment, the inventors have conducted intensive studies on the structure of the substrate, the inkjet printing process, the solvent drying process, and the like, and have found that the uniformity of the film formation of the functional material at the edge of the substrate can be improved by designing the structure of the substrate. Specifically, during film formation by drying, the ambient solvent is filled in the ambient solvent groove 303, so that the vapor concentration outside the pixel unit 301 can be improved, and the pressures on the two sides of the pixel unit 301 can be balanced, so that the solvent of the pixel unit 301 at the edge of the effective display area does not shift toward the outside of the pixel unit 301 when being volatilized, and the uniformity of film formation at the edge of the effective display area can be effectively improved. In addition, the solvent barrier 304 has a speed-reducing and flow-guiding function for the volatilized solvent, so that the solvent in the pixel unit 301 can be further prevented from being volatilized and deposited in the region other than the pixel unit 301, and the uniformity of film formation at the edge of the effective display region can be further improved.
Furthermore, as the demand for narrowing the edge of the display device is becoming more and more popular, the demand for narrowing the edge of the display device by consumers is becoming higher and the design of the edge narrowing is becoming a mainstream trend of the display device. Since the conventional method has a defect that it is difficult to uniformly form a film on the edge of the substrate, the edge display effect of the substrate is poor when the substrate obtained by the conventional method is mounted on a display device. If a narrow-sided design is required, a problem arises in that the edges of the display area are poorly displayed. Therefore, in order to ensure a good display effect, the pixel units with poor display effect at the edge of the substrate often need to be hidden, which may increase the thickness of the frame of the display device, and make it difficult to implement a narrow-edge design of the display device. This problem can be solved well by using the substrate for inkjet printing in the present embodiment. Due to the existence of the ambient solvent groove 303 and the solvent barrier 304 in the present embodiment, the solvent in the pixel unit 301 at the edge of the effective display area can be effectively prevented from being evaporated and deposited outside the pixel unit 301. Therefore, the display effect of the edge of the effective display area can be kept, the edge of the effective display area does not need to be hidden, and the thickness of the frame of the display equipment can be reduced under the condition that the good display effect of the edge is ensured.
Referring to fig. 5, an included angle α formed between the drainage wall 3031 and the bottom of the ambient solvent groove 303 is 90 ° to 120 °. It will be appreciated that in the embodiment shown in fig. 5, the solvent barrier 304 is trapezoidal, the angle α formed by the drain wall 3031 and the bottom of the ambient solvent recess 303 is 90 ° to 120 °, and that the bottom angle β of the solvent barrier 304 near the active display area is 60 ° to 90 °. At this time, the solvent blocking member 304 can effectively block and guide the volatilization of the solvent, so as to effectively control the volatilization direction and volatilization speed of the solvent, and improve the uniformity of the film formation of the functional material at the edge of the substrate. In addition, the included angle formed by the drainage wall 3031 and the groove bottom of the atmosphere solvent groove 303 is 90-120 degrees. In production, for example, the drainage wall 3031 forms an angle of 90 °, 95 °, 100 °, 105 °, 110 °, 115 ° or 120 ° with the groove bottom of the ambient solvent groove 303, which is convenient for processing and forming. The processing requirement of the included angle between the drainage wall 3031 and the groove bottom of the atmosphere solvent groove 303 is easily met in production. Optionally, the angle formed by the drainage wall 3031 and the bottom of the ambient solvent groove 303 is 110 ° to 120 °. At this time, the drainage effect of the drainage wall 3031 is more effective in preventing the volatilized solvent from flowing back to the pixel unit 301, and preventing the backflow of the volatilized solvent from bringing adverse effects to the pixel unit 301.
In a specific example, the included angle γ formed between the groove wall of the ambient solvent groove 303 near the effective display region and the effective display region is 90 ° to 120 °. For example, the included angle formed between the groove wall of the ambient solvent groove 303 close to the effective display area and the effective display area is 90 °, 95 °, 100 °, 105 °, 110 °, 115 °, or 120 °. Within this angle range, the volatilization of the ambient solvent can be better matched with the volatilization of the solvent in the pixel unit 301, which is beneficial to balancing the pressure at two sides of the pixel unit 301, and further avoids the solvent of the pixel unit 301 at the edge of the effective display area from shifting towards the outside of the pixel unit 301 when volatilizing. When the angle formed between the groove wall of the atmosphere solvent groove 303 close to the effective display area and the effective display area is too large, volatilization of the solvent in the atmosphere solvent groove 303 is blocked by the groove wall of the groove, which affects volatilization of the solvent, and also causes the solvent to be retained in the groove, which adversely affects performance of the functional device. When the angle formed between the wall of the ambient solvent groove 303 close to the effective display area and the effective display area is too small, the amount of solvent that can be contained in the groove is too small, which restricts the balance performance of the solvent to the pressure on both sides of the pixel unit 301, and also causes the width of the groove to be large, which is not favorable for the design of narrow sides. Optionally, an included angle formed between a groove wall of the ambient solvent groove 303 close to the effective display area and the effective display area is 110 ° to 120 °.
In another specific example, drainage wall 3031 abuts a wall of a trench of ambient solvent trench 303 proximate to the active display area. At this time, the groove walls of the atmosphere solvent groove 303 abut against each other, which is favorable for further reducing the width of the groove and further meeting the design requirement of narrowing the edge. For example, referring again to fig. 4, in the embodiment shown in fig. 4, the walls of the ambient solvent cavity 303 abut, the ambient solvent cavity 303 extends from the edge of the active display area to the inactive display area, and then the drainage wall 3031 directly forms the solvent barrier 304.
As some optional dimensions of the solvent barriers 304, the height of the solvent barriers 304 protruding from the effective display area is 1 μm to 3 μm. And may be selected to be 2 μm. For example, the height of the solvent barrier 304 protruding from the effective display area is 1 μm, 1.5 μm, 2 μm, 2.5 μm, or 3 μm. The solvent barrier 304 protrudes from the effective display area to a small height, which is difficult to have a good barrier effect on the volatilization of the solvent; the solvent barrier 304 protruding from the effective display area to a large height may cause an excessive thickness of the substrate, which is not favorable for the light and thin design of the substrate.
As one specific shape example of the solvent barrier 304, the top of the solvent barrier 304 forms an extended platform; the extension plateau is parallel to the groove bottom of the ambient solvent groove 303. The top of the solvent barrier 304 forms an extended plateau parallel to the bottom of the ambient solvent groove 303 to facilitate the fabrication of the solvent barrier 304, for example, when the solvent barrier 304 is formed by vapor deposition, an extended plateau parallel to the bottom of the ambient solvent groove 303.
Optionally, the height of the extended platform from the effective display area is 1 μm to 3 μm. At this time, the height of the extended platform from the effective display area is the height of the solvent barrier 304 protruding from the effective display area.
As a specific example of the manner in which the solvent barrier 304 is formed, the solvent barrier 304 is formed by a vapor deposition method. Optionally, the solvent barrier 304 is a silicon nitride solvent barrier or a silicon carbide solvent barrier. Namely, a silicon nitride solvent barrier or a silicon carbide solvent barrier is formed by a vapor deposition method.
In a specific example, the groove bottom of the ambient solvent groove 303 has a height of 1 μm to 2 μm from the effective display area. The amount of the ambient solvent in the ambient solvent groove 303 may be controlled to be in a suitable range at this time so that the pressure on both sides of the pixel unit 301 can be maintained in an equilibrium state during the drying process. Alternatively, the height of the groove bottom of the ambient solvent groove 303 from the effective display area is equal to the depth of the pixel unit 301.
It should be noted that the solvent in the ambient solvent groove 303 may be the same solvent as that in the pixel unit 301, so that the ambient solvent is filled in the ambient solvent groove 303. For example, in the inkjet printing process, when functional material ink is injected into the pixel unit 301, the same functional material ink as that in the pixel unit 301 is simultaneously injected into the ambient solvent groove 303 by the arrangement of the inkjet system. For example, when preparing a hole injection layer, the same hole injection layer ink is injected in the pixel unit 301 and the ambient solvent groove 303; when preparing the hole transport layer, the same hole transport layer ink is injected into the pixel unit 301 and the ambient solvent groove 303; when preparing the light emitting layer material, the same light emitting layer material ink is injected in the pixel unit 301 and the ambient solvent groove 303. By adopting the substrate in the embodiment, when ink-jet printing is performed, the same functional material ink is injected into the atmosphere solvent groove 303 and the pixel unit 301, the operation is simple and easy to implement, and no extra step is required to inject the atmosphere solvent into the atmosphere solvent groove 303.
In an alternative embodiment, the groove bottom and the groove wall of the ambient solvent groove 303 are provided with hydrophilic reinforcement layers. The hydrophilic enhancement layers are arranged on the groove bottom and the groove wall of the atmosphere solvent groove 303, so that the atmosphere solvent in the atmosphere solvent groove 303 is in an integral solvent state, the volatilization of the atmosphere solvent is more stable, the balance of the pressure intensity at two sides of the pixel unit 301 in the drying process is favorably kept, and the uniformity of film forming at the edge of the effective display area is further improved. It should be noted that, when the hydrophilic layer is formed, the hydrophilic enhancement layer may be formed on the groove bottom and the groove wall of the ambient solvent groove 303 by a deposition method, or the material of the groove bottom and the groove wall of the ambient solvent groove 303 may be photo-modified by a photo-modification method to form the hydrophilic enhancement layer. It will be appreciated that the hydrophilic enhancement layer is a functional layer that enhances the hydrophilic properties of the groove bottom and groove walls of the ambient solvent groove 303.
In a specific example, the minimum distance between the wall of the ambient solvent groove 303 close to the active display area and the pixel cell 301 in the active display area is 20 μm to 50 μm. For example, the minimum distance may be 20 μm, 30 μm, 40 μm, or 50 μm, etc. The minimum distance between the wall of the ambient solvent groove 303 close to the effective display area and the pixel cell 301 in the effective display area is the distance between the wall of the ambient solvent groove 303 close to the effective display area and the pixel cell 301 in the effective display area closest to the ambient solvent groove 303. Within the distance range, a stable pressure environment can be formed on one side of the pixel unit 301 close to the ambient solvent groove 303, and the pressure environment is balanced with the pressure environment on the other side of the pixel unit 301, so that the solvent in the pixel unit 301 does not deviate like the pixel unit 301 in the volatilization process, and the uniformity of film formation at the edge of the effective display area can be effectively improved.
Referring to fig. 6, another embodiment of the present invention provides a schematic diagram of solvent evaporation during drying of a substrate for inkjet printing. In the conventional method, in the process of volatilizing the solvent in the pixel unit, because the volatilization speed of the solvent at the edge of the substrate is high, the volatilization path of the solvent deviates to the outside of the pixel unit, and uneven film formation is caused. In this embodiment, by providing the ambient solvent groove 303 and the solvent barrier 304, the volatilization path of the solvent in the pixel unit 301 can be effectively controlled. So that during the drying process, under the action of the condensation flow guide plate 400, the solvent volatilization direction 401 in the pixel unit is vertically upward, and the atmosphere solvent volatilization direction 402 is guided out under the action of the solvent barrier 304. Therefore, the solvent can be effectively prevented from being accumulated outside the pixel unit 301, and the uniformity of film formation at the edge of the effective display area can be improved. Meanwhile, the thickness of the frame of the display equipment can be reduced under the condition that the edge display effect is good.
Yet another embodiment of the present invention provides a drying apparatus for an inkjet-printed substrate, which includes a condensation drainage plate 400 and a drying platform; the drying platform is used for placing the substrate for ink-jet printing; the condensation drainage plate 400 is located above the drying platform for conducting condensation drainage on steam generated by the substrate for inkjet printing during drying.
In a specific example, the drying apparatus further includes a negative pressure forming device for forming a negative pressure environment during the drying process to perform reduced pressure drying on the substrate.
Yet another embodiment of the present invention provides a method of preparing a substrate for inkjet printing, the method comprising the steps of: dividing the substrate main body 300 into an effective display area and a non-effective display area, such that the non-effective display area is located at the periphery of the effective display area; forming an atmosphere solvent groove 303 on the edge of the effective display area, so that the atmosphere solvent groove 303 extends from the edge of the effective display area to the non-effective display area; the groove wall of the ambient solvent groove 303 away from the effective display area extends from the direction away from the groove bottom thereof to form a solvent stopper 304.
Alternatively, the ambient solvent groove 303 is formed in synchronization with the pixel unit 301 of the effective display area. Specifically, the ambient solvent groove 303 is formed in synchronization with the pixel unit 301 of the effective display region by mask etching. For example, a photoresist etching method is used to form the ambient solvent groove 303 in synchronization with the pixel unit 301 of the effective display area. Further, the solvent barrier 304 is formed using vapor deposition. By forming the solvent barrier 304 by vapor deposition, the thickness of the solvent barrier 304 can be accurately controlled.
Yet another embodiment of the present invention provides a method of preparing a substrate for inkjet printing, the method comprising the steps of: performing thickness modification treatment on the substrate main body 300 to obtain a substrate main body 300 with a preset thickness; dividing the substrate main body 300 having a predetermined thickness into an effective display area and a non-effective display area such that the non-effective display area is positioned at the periphery of the effective display area; an ambient solvent groove 303 is formed on a substrate body 300 having a predetermined thickness, the ambient solvent groove 303 extends from an edge of an effective display region to a non-effective display region, and a groove wall of the ambient solvent groove 303 away from the effective display region extends from a direction away from a groove bottom thereof to form a solvent stopper 304.
In the manufacturing method of the present embodiment, a thickness modification process is performed on the substrate main body 300 to obtain the substrate main body 300 with a predetermined thickness. Then, the substrate main body 300 having a predetermined thickness is processed to obtain the ambient solvent grooves 303 and the solvent barriers 304. Specifically, the thickness modification process performed on the substrate main body 300 is a thickening process performed on the substrate main body 300. For example, the substrate body 300 may be thickened using vapor deposition.
Alternatively, the thickness of the solvent barrier 304 is equal to the predetermined thickness. In the process, the substrate body 300 is thickened according to the thickness of the solvent barrier 304 required by the design to the same thickness as the thickness requirement of the solvent barrier 304, so as to obtain the substrate body 300 with a preset thickness. Then, the ambient solvent groove 303 is formed. Further, the ambient solvent groove 303 is formed in synchronization with the pixel unit 301 of the effective display area. Still further, the ambient solvent groove 303 is formed in synchronization with the pixel unit 301 of the effective display region by mask etching.
Yet another embodiment of the present invention provides a display, which includes the substrate for inkjet printing or the substrate for inkjet printing obtained by the above manufacturing method, and a housing; the substrate for inkjet printing is mounted to a housing for a display panel as a display. By using the substrate for ink-jet printing as the display panel, the thickness of the frame of the display can be effectively reduced, and the narrow edge design of the display is realized.
The invention further provides an electronic product, which comprises the substrate for ink-jet printing or the substrate for ink-jet printing obtained by the preparation method or the display.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A substrate for inkjet printing, comprising a substrate body, an ambient solvent recess, and a solvent barrier; the substrate main body is divided into an effective display area and a non-effective display area positioned at the periphery of the effective display area; the ambient solvent groove extends from the edge of the active display area to the inactive display area; the atmosphere solvent recess is kept away from the cell wall of effective display area forms the drainage wall, the drainage wall extends from the direction of keeping away from the cell bottom of atmosphere solvent recess and forms the solvent stops, the solvent stops protrusion in effective display area.
2. The substrate for inkjet printing according to claim 1 wherein the angle formed by the drainage wall and the groove bottom of the ambient solvent groove is 90 ° to 120 °; and/or the presence of a gas in the gas,
and an included angle formed between the groove wall of the atmosphere solvent groove close to the effective display area and the effective display area is 90-120 degrees.
3. The substrate for inkjet printing according to claim 1 wherein the drainage wall abuts against a wall of the ambient solvent groove near the active display area.
4. The substrate for inkjet printing according to any one of claims 1 to 3, wherein the height of the solvent stopper protruding from the effective display area is 1 μm to 3 μm.
5. The substrate for inkjet printing according to any one of claims 1 to 3, wherein a height of a groove bottom of the atmospheric solvent groove from the effective display area is 1 μm to 2 μm.
6. The substrate for inkjet printing according to any one of claims 1 to 3, wherein a minimum distance between a groove wall of the ambient solvent groove near the effective display area and a pixel unit in the effective display area is 20 μm to 50 μm.
7. The substrate for inkjet printing according to any one of claims 1 to 3, wherein the groove bottom and the groove wall of the atmospheric solvent groove are provided with a hydrophilic reinforcing layer.
8. A method for preparing a substrate for ink-jet printing, comprising the steps of:
dividing a substrate main body into an effective display area and a non-effective display area, and enabling the non-effective display area to be located at the periphery of the effective display area;
forming an atmosphere solvent groove at the edge of the effective display area, and extending the atmosphere solvent groove from the edge of the effective display area to the non-effective display area;
and extending the groove wall of the atmosphere solvent groove far away from the effective display area from the direction far away from the groove bottom to form a solvent barrier.
9. A method for preparing a substrate for ink-jet printing, comprising the steps of:
performing thickness modification treatment on the substrate main body to obtain a substrate main body with a preset thickness;
dividing the substrate main body with the preset thickness into an effective display area and a non-effective display area, and enabling the non-effective display area to be located on the periphery of the effective display area;
forming an atmosphere solvent groove on the substrate main body with the preset thickness, enabling the atmosphere solvent groove to extend from the edge of the effective display area to the non-effective display area, and enabling the atmosphere solvent groove to be far away from the groove wall of the effective display area to extend from the direction far away from the groove bottom of the effective display area to form a solvent stop piece.
10. A display comprising the substrate according to any one of claims 1 to 7 or the substrate obtained by the manufacturing method according to claim 8 or the substrate obtained by the manufacturing method according to claim 9, and a case; the substrate is mounted to the housing for serving as a display panel of the display.
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