CN110376781B - Substrate, preparation method thereof and display panel - Google Patents
Substrate, preparation method thereof and display panel Download PDFInfo
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- CN110376781B CN110376781B CN201910668215.3A CN201910668215A CN110376781B CN 110376781 B CN110376781 B CN 110376781B CN 201910668215 A CN201910668215 A CN 201910668215A CN 110376781 B CN110376781 B CN 110376781B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Human Computer Interaction (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The embodiment of the invention provides a substrate, a preparation method thereof and a display panel, relates to the technical field of display and can simplify a production process. A substrate, comprising: the touch screen comprises a substrate, a retaining wall and a touch structure, wherein the retaining wall and the touch structure are arranged on the substrate; the touch structure comprises a plurality of first touch electrodes arranged at intervals and a plurality of second touch electrodes arranged at intervals; the first touch electrode and the second touch electrode are mutually crossed, and the first touch electrode is closer to the substrate relative to the second touch electrode; the retaining wall defines a plurality of opening areas, and the plurality of opening areas are provided with one light conversion structure in a one-to-one correspondence manner; wherein the first touch electrode and the second touch electrode are insulated at their crossing positions by the light conversion structure.
Description
Technical Field
The invention relates to the technical field of display, in particular to a substrate, a preparation method of the substrate and a display panel.
Background
With the development of economic life, touch display panels have been widely accepted and used by people, for example, smart phones, tablet computers, and the like all use touch display panels. The touch display panel combines touch control and a display panel into a whole, so that the display panel has the functions of displaying and sensing touch control at the same time. The embedded touch display panel has high integration degree and small thickness, has the advantages of low cost, ultra-thin and narrow frame, and has evolved into the main development direction of future touch technologies.
Disclosure of Invention
The embodiment of the invention provides a substrate, a preparation method thereof and a display panel, which can simplify the production process.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in a first aspect, a substrate is provided, comprising: the touch screen comprises a substrate, a retaining wall and a touch structure, wherein the retaining wall and the touch structure are arranged on the substrate; the touch structure comprises a plurality of first touch electrodes arranged at intervals and a plurality of second touch electrodes arranged at intervals; the first touch electrode and the second touch electrode are mutually crossed, and the first touch electrode is closer to the substrate relative to the second touch electrode; the retaining wall defines a plurality of opening areas, and the plurality of opening areas are provided with one light conversion structure in a one-to-one correspondence manner; wherein the first touch electrode and the second touch electrode are insulated at their crossing positions by the light conversion structure.
Optionally, the retaining wall includes a plurality of sub-retaining walls arranged at intervals, and an extending direction of the sub-retaining walls is the same as an extending direction of the first touch electrode; the area between any adjacent sub retaining walls is the opening area; the first touch electrodes are correspondingly positioned in the opening area one by one; the height of the sub-retaining wall is higher than that of the first touch electrode.
Optionally, the second touch electrode includes a plurality of first sub-electrodes along an extending direction of the second touch electrode, and a second sub-electrode used for connecting any two adjacent first sub-electrodes in the extending direction of the second touch electrode; a plurality of grooves are formed in the sub-retaining wall, and the second sub-electrodes are correspondingly positioned in one groove one by one; a drainage structure is further arranged on one side of the groove, which is far away from the second sub-electrode, a gap is formed between the side surface of the drainage structure and the retaining wall, and the first sub-electrode is electrically connected with the second sub-electrode through the gap; the drainage structure has lyophilic properties.
Optionally, the substrate further includes a buffer layer disposed between the first touch electrode and the light conversion structure; the orthographic projection of the buffer layer on the substrate covers the first touch electrode.
Optionally, the substrate further includes a protection layer disposed on a side of the second touch electrode away from the substrate.
Optionally, the thickness of the retaining wall is 8-12 μm; and/or the thickness of the drainage structure is 2-3 mu m; and/or the thickness of the second sub-electrode
Optionally, the plurality of light conversion structures include a red light conversion structure, a green light conversion structure, and a blue light conversion structure; or, the plurality of light conversion structures comprise a red light conversion structure, a green light conversion structure and a transparent insulation structure; the transparent insulating structure is used for transmitting blue light.
In a second aspect, a display panel is provided, which includes the substrate.
In a third aspect, a method for manufacturing a substrate is provided, including: sequentially forming a plurality of first touch electrodes arranged at intervals and a plurality of second touch electrodes arranged at intervals on a substrate; the first touch electrode and the second touch electrode are mutually crossed; before forming the second touch electrode, the method for preparing the substrate further includes: forming a retaining wall, wherein the retaining wall defines a plurality of opening areas; forming a light conversion structure in a one-to-one correspondence manner in the plurality of opening areas; wherein the first touch electrode and the second touch electrode are insulated at their crossing positions by the light conversion structure.
Optionally, the retaining wall is formed before the first touch electrode; the retaining wall comprises a plurality of sub retaining walls which are arranged at intervals, and the extending direction of the sub retaining walls is the same as that of the first touch electrode; the area between any adjacent sub retaining walls is the opening area; forming the first touch electrode includes: forming the first touch electrodes in the opening area in a one-to-one correspondence manner by adopting an ink-jet printing process; the height of the sub-retaining wall is higher than that of the first touch electrode.
Optionally, the second touch electrode includes a plurality of first sub-electrodes along an extending direction of the second touch electrode, and a second sub-electrode used for connecting any two adjacent first sub-electrodes in the extending direction of the second touch electrode; forming the retaining wall, comprising: forming the retaining wall comprising a plurality of sub-retaining walls which are arranged at intervals by using a gray scale mask plate, wherein the sub-retaining walls are provided with grooves in regions which correspond to the second sub-electrodes to be formed one by one; forming the second touch electrode includes: forming the second sub-electrode in the groove; forming a drainage structure on one side of the groove far away from the second sub-electrode; the drainage structure has lyophilic properties; a gap is formed between the side surface of the drainage structure and the sub-retaining wall; forming the first sub-electrode on one side of the light conversion structure far away from the substrate along the direction of the second touch electrode to be formed by adopting an ink-jet printing process; the first sub-electrode is electrically connected with the second sub-electrode through the gap.
Embodiments of the present invention provide a substrate, a manufacturing method thereof, and a display panel, in which a first touch electrode and a second touch electrode are insulated at a crossing position thereof by a light conversion structure, so that an insulating layer is not required to be disposed between the first touch electrode and the second touch electrode, and a production process is simplified. And the light conversion structure can convert the color of light emitted into the light conversion structure to emit colored light, so that the substrate has the light conversion function and the touch function, and the actual application range is widened. When the substrate is applied to a display device, embedded touch can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic top view of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a sub-pixel according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of another sub-pixel according to an embodiment of the present invention;
fig. 4 is a schematic top view of a substrate according to an embodiment of the invention;
FIG. 5 is a schematic cross-sectional view of the substrate of FIG. 4 taken along the direction A-A';
FIG. 6 is a schematic cross-sectional view of the substrate of FIG. 4 taken along the direction B-B';
FIG. 7 is a schematic top view of another substrate according to an embodiment of the invention;
FIG. 8 is a schematic cross-sectional view of the substrate of FIG. 7 taken along the direction C-C';
FIG. 9 is a schematic cross-sectional view of the substrate of FIG. 7 taken along the direction D-D';
FIG. 10 is a schematic top view of another substrate according to an embodiment of the present invention;
FIG. 11 is a schematic cross-sectional view of the substrate of FIG. 10 taken along the direction E-E';
FIG. 12 is a schematic top view of another substrate according to an embodiment of the present invention;
FIG. 13 is a schematic cross-sectional view of the substrate of FIG. 12 taken along the direction F-F';
FIG. 14 is a schematic cross-sectional view of the substrate of FIG. 12 along the direction G-G';
FIG. 15 is a schematic top view of another substrate according to an embodiment of the present invention;
FIG. 16 is a schematic cross-sectional view of the substrate of FIG. 15 taken along the direction H-H';
fig. 17 is a schematic structural diagram of another substrate according to an embodiment of the invention;
FIG. 18 is a schematic structural diagram of another substrate according to an embodiment of the present invention;
FIG. 19 is a schematic top view of another substrate according to an embodiment of the present invention;
FIG. 20 is a schematic top view of another substrate according to an embodiment of the present invention;
fig. 21 is a schematic flow chart illustrating a method for fabricating a substrate according to an embodiment of the invention;
FIG. 22 is a schematic flow chart illustrating another method for fabricating a substrate according to an embodiment of the present invention;
fig. 23 is a schematic perspective view of a substrate according to an embodiment of the present invention;
FIG. 24 is a schematic cross-sectional view of the substrate of FIG. 23 taken along the direction I-I';
fig. 25 is a schematic view of a manufacturing process of a substrate according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a display panel. As shown in fig. 1, the display panel has a display area (AA area) and a peripheral area S, for example, the peripheral area S is disposed around the AA area. A plurality of sub-pixels P are arranged in the AA area; the plurality of sub-pixels P includes at least a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel, the first color, the second color, and the third color being three primary colors (e.g., red, green, and blue).
Fig. 1 illustrates an example of the arrangement of the plurality of sub-pixels in an array. In this case, the sub-pixels arranged in a line in the horizontal direction X are referred to as the same row of sub-pixels, and the sub-pixels arranged in a line in the vertical direction Y are referred to as the same column of sub-pixels.
On the basis, optionally, the sub-pixels in the same row can be connected with a grid line, and the sub-pixels in the same column can be connected with a data line.
Optionally, the display panel is a liquid crystal display panel, in this case, as shown in fig. 2, the liquid crystal display panel includes an array substrate 10, a color filter substrate 20, and a liquid crystal layer 30 disposed therebetween.
As shown in fig. 2, a TFT (Thin Film Transistor) and a pixel electrode 12 are included on the array substrate 10 corresponding to each sub-pixel P. In some embodiments, the array substrate 10 may further include a common electrode 13. Here, the pixel electrode 12 and the common electrode 13 may be disposed on the same layer, and in this case, the pixel electrode 12 and the common electrode 13 are each a comb-tooth structure including a plurality of strip-shaped sub-electrodes. The pixel electrode 12 and the common electrode 13 may also be provided at different layers, in which case the first insulating layer 14 is provided between the pixel electrode 12 and the common electrode 13 as shown in fig. 2. In the case where the common electrode 13 is provided between the TFT and the pixel electrode 12, as shown in fig. 2, a second insulating layer 15 is further provided between the common electrode 13 and the TFT. In other embodiments, the common electrode 13 is disposed on the color filter substrate 20.
The color filter substrate 20 includes a light conversion structure 73 corresponding to each sub-pixel P, and the light conversion structure 73 is configured to convert the color of light incident thereto and emit the light from the light conversion structure 73. It is to be understood that the plurality of light converting structures 73 may comprise a first color light converting structure, a second color light converting structure and a third color light converting structure, the first color, the second color and the third color being three primary colors, e.g. red, green and blue for the first color, the second color and the third color, respectively. The first color light conversion structure is located in the first color sub-pixel and emits light with a first color, the second color light conversion structure is located in the second color sub-pixel and emits light with a second color, and the third color light conversion structure is located in the third color sub-pixel and emits light with a third color.
Alternatively, the display panel is a self-luminous display panel, in which case, as shown in fig. 3, the self-luminous display panel includes an array substrate 10 and an encapsulation substrate 60. The package substrate 60 may be a thin film package layer or a rigid substrate.
As shown in fig. 3, the array substrate 10 in the self-luminous display panel includes a pixel driving circuit 50 and a light emitting device 40 corresponding to each sub-pixel P. The pixel driving circuit 50 is composed of electronic devices such as a TFT and a capacitor (C). For example, the pixel drive circuit 50 may be a pixel drive circuit 50 of a 2T1C structure composed of two TFTs (one switching TFT and one driving TFT) and one capacitor; of course, the pixel driving circuit 50 may be a pixel driving circuit 50 configured by two or more TFTs (a plurality of switching TFTs and one driving TFT) and at least one capacitor.
The above-described light-emitting device 40 includes a cathode 45 and an anode 41, and a light-emitting functional layer located between the cathode 45 and the anode 41. As shown in fig. 3, taking the Light Emitting device as an OLED (Organic Light-Emitting Diode) as an example, the Light Emitting function layer may include an Organic Light-Emitting layer 43, a hole transport layer 42 between the Organic Light-Emitting layer 43 and the anode 41, and an electron transport layer 44 between the Organic Light-Emitting layer 43 and the cathode 45. Of course, in some embodiments, a hole injection layer may also be disposed between the hole transport layer 42 and the anode 41, and an electron injection layer may be disposed between the electron transport layer 44 and the cathode 45, as desired.
It should be noted that fig. 3 is a schematic diagram, and does not show the connection relationship between the pixel driving circuit 50 and the light emitting device 40 (in practice, an appropriate pixel driving circuit 50 may be selected as needed).
On this basis, optionally, a light conversion structure 73 may be correspondingly disposed on the array substrate 10 corresponding to each sub-pixel P and on the light emitting side of the light emitting device 40, and the light conversion structure 73 is configured to convert the color of light entering the light conversion structure 73 and emit the light from the light conversion structure 73. Of course, the light conversion structure 73 may also be disposed on the package substrate 60.
The embodiment of the invention provides a substrate, which can be applied to any one of the array substrate 10, the color filter substrate 20 or the package substrate 60.
As shown in fig. 4 to 9, the substrate includes: the touch screen comprises a substrate 70, a retaining wall 71 and a touch structure, wherein the retaining wall 71 is arranged on the substrate 70; the touch structure includes a plurality of first touch electrodes 721 arranged at intervals and a plurality of second touch electrodes 722 arranged at intervals; the first touch electrode 721 and the second touch electrode 722 are crossed with each other, and the first touch electrode 721 is closer to the substrate 70 than the second touch electrode 722; the retaining wall 71 defines a plurality of opening areas 701, and one light conversion structure 73 is arranged in the plurality of opening areas 701 in a one-to-one correspondence manner; the first touch electrode 721 and the second touch electrode 722 are insulated at their crossing positions by the photo-conversion structure 73.
Optionally, the first touch electrode 721 and the second touch electrode 722 are both in a grid structure, and the first touch electrode 721 and the second touch electrode 722 are both made of a metal material.
For example, the material of the first touch electrode 721 and the second touch electrode 722 may be a transparent conductive metal material including nano silver (Ag).
The shape of the mesh in the mesh structure may be a regular polygon or an irregular polygon, for example, the mesh structure may be a plurality of rhombic meshes formed by intersecting a plurality of metal wires. The mesh structure transmits light, and allows light to enter the light conversion unit 73 from the substrate 70 and exit to the side away from the substrate 70.
The material of the light conversion structure 73 may be quantum dot material. It can be understood that, since the size of the quantum dot determines the emission color thereof, the size of the quantum dot material in the first color light conversion structure, the size of the quantum dot material in the second color light conversion structure, and the size of the quantum dot material in the third color light conversion structure are different from each other. In the case where the first color light conversion structure, the second color light conversion structure, and the third color light conversion structure are a red light conversion structure, a green light conversion structure, and a blue light conversion structure, respectively, the size of the quantum dot material in the red light conversion structure is, for example, 2.4nm, the size of the quantum dot material in the green light conversion structure is, for example, 1.7nm, and the size of the quantum dot material in the blue light conversion structure is, for example, 1.0 nm.
Illustratively, the quantum dot material includes cadmium selenide (CdSe).
It should be noted that, in practical applications, a person skilled in the art may connect the first touch electrode to the first touch electrode line and connect the second touch electrode to the second touch electrode line, so as to identify the touch position through an Integrated Circuit (IC) connected to the first touch electrode line and the second touch electrode line.
It can be understood that the number of the first touch electrodes 721 and the second touch electrodes 722 are plural, the number of the first touch electrodes 721 and the number of the second touch electrodes 722 may be the same or different, the first touch electrodes 721 are electrically disconnected, and the second touch electrodes 722 are electrically disconnected.
It should be noted that those skilled in the art can arrange the opening regions 701 according to the arrangement of the sub-pixels.
As shown in fig. 7 to 9, in the case that the colors of the same row of sub-pixels arranged in the vertical direction Y are different, the retaining walls 71 on the substrate are in a grid shape, and the opening regions 701 defined by the retaining walls 71 may correspond to the sub-pixels one to one. In this case, the light conversion structures 73 correspond to the sub-pixels one by one, and the color of light emitted from one light conversion structure 73 is the same as the color of its corresponding sub-pixel.
As shown in fig. 4 to 6, in the case where the same column of sub-pixels arranged in the vertical direction Y have the same color, the opening area 701 defined by the bank 71 on the substrate may correspond to a plurality of sub-pixels, and the colors of the plurality of sub-pixels located in one opening area 701 are all the same. In this case, the light conversion structures 73 correspond to sub-pixels of the same color in the same column, and the color of light emitted from one light conversion structure 73 is the same as the color of the sub-pixel in the column corresponding thereto. For example, the sub-pixels in the horizontal direction X are periodically arranged in order of a red sub-pixel, a green sub-pixel, and a blue sub-pixel, and the corresponding light conversion structures 73 are arranged in order of a red light conversion structure, a green light conversion structure, and a blue light conversion structure.
Embodiments of the present invention provide a substrate, in which the first touch electrode 721 and the second touch electrode 722 are insulated at their crossing positions by the light conversion structure 73, so that an insulating layer is not required to be disposed between the first touch electrode 721 and the second touch electrode 722, thereby simplifying the manufacturing process. Moreover, the light conversion structure 73 can convert the color of the light entering the light conversion structure to emit colored light, so that the substrate has both the light conversion function and the touch function, and the actual application range is widened. When the substrate is applied to a display device, embedded touch can be realized.
Optionally, the retaining wall 71 includes a plurality of sub-retaining walls 711 arranged at intervals, as shown in fig. 10-11, an extending direction of the sub-retaining walls 711 is the same as an extending direction of the first touch electrode 721; an area between any adjacent sub-retaining walls 711 is an open area 701; the first touch electrodes 721 are located in one opening area 701 in a one-to-one correspondence; the height of the sub-barriers 711 is higher than that of the first touch electrode 721.
It can be understood that the adjacent first touch electrodes 721 are isolated by the sub-barriers 711. Also, the orthographic projection of the light conversion structure 73 located in one opening area 701 on the substrate 70 covers the first touch electrode 721.
Since one light conversion structure 73 emits light of one color, the sub-pixels in the region of one light conversion structure 73 have the same color, and can share one light conversion structure 73 to emit light, thereby simplifying the production process and saving the cost.
It should be noted that, when the substrate is actually applied to a display device, a person skilled in the art may also set a suitable light shielding pattern (e.g., a black matrix) so as to avoid the problems of light crosstalk or light leakage.
Optionally, as shown in fig. 12-14, the second touch electrode 722 includes a plurality of first sub-electrodes 7221 along the extending direction of the second touch electrode 722, and a second sub-electrode 7222 for connecting any two adjacent first sub-electrodes 7221 along the extending direction of the second touch electrode 722; a plurality of grooves 712 are formed on the sub-retaining wall 711, and a plurality of second sub-electrodes 722 are correspondingly positioned in one groove 712; a drain structure 713 is further arranged on one side of the groove 712 far away from the second sub-electrode 722, a gap exists between the side face of the drain structure 713 and the sub-barrier wall 711, and the first sub-electrode 7221 is electrically connected with the second sub-electrode 7222 through the gap; the drainage structures 713 have lyophilic properties.
The sub-retaining wall 711 has lyophobicity.
Optionally, the first sub-electrode 7221 has a mesh structure, and the first sub-electrode 7221 transmits light.
For example, the material of the second sub-electrode 7222 may be a metal material including silver (Ag), aluminum (Al), or the like. The material of the first sub-electrode 7221 may be a transparent conductive metal material including nano silver or the like.
It can be understood that, since the drainage structures 713 have lyophilic properties, during the process of forming the first sub-electrode 7221, for example, by using an inkjet printing process, the drainage structures 713 may generate a drawing effect on the ink containing the material of the first sub-electrode 7221, during the drying process of the ink, along the direction of the second touch electrode 722, the drainage structures 713 located at both sides of the ink may elongate the ink, so that the ink enters the gap between the side surfaces of the drainage structures 713 and the sub-barrier 711 and is electrically connected to the second sub-electrode 7222, and after the ink is dried, the first sub-electrode 7221 is obtained, so that the second touch electrode 722 including the first sub-electrode 7221 and the second sub-electrode 7222 can be smoothly conducted.
On the basis of this, a person skilled in the art can form the first sub-electrode 7221 by controlling the amount of ink containing the material of the first sub-electrode 7221 and the position of the landing point by means of the drain structure 713.
Note that the ink containing the material of the first sub-electrode 7221 and the drain structure 713 are mutually compatible.
On this basis, optionally, the retaining wall 71 is in a grid structure under the condition that the opening regions 701 correspond to the sub-pixels one by one. At this time, the grooves 712 may be arranged as shown in fig. 15 to 16.
Optionally, as shown in fig. 17, the substrate further includes a buffer layer 74 disposed between the first touch electrode 721 and the light conversion structure 73; the orthographic projection of the buffer layer 74 on the substrate 70 covers the first touch electrode 721.
For example, the material of the buffer layer 74 may be an inorganic material including silicon nitride, silicon oxide, and the like.
In the process of technologically preparing the light conversion structure 73, a material to form the light conversion structure 73 may be effectively spread on the buffer layer 74, thereby improving the uniformity of the light conversion structure 73.
Optionally, as shown in fig. 18, the substrate further includes a protection layer 75 disposed on a side of the second touch electrode 722 away from the substrate 70. The protective layer 75 can prevent the substrate from being damaged.
Illustratively, the material of the protective layer 75 may be an organic material.
Optionally, the thickness of the retaining wall 71 is 8-12 μm; and/or the thickness of the drainage structure 713 is 2-3 μm; and/or the thickness of the second sub-electrode 7222
Alternatively, as shown in fig. 19, the plurality of light conversion structures 73 includes a red light conversion structure 731, a green light conversion structure 732, and a blue light conversion structure 733; alternatively, as shown in fig. 20, the plurality of light conversion structures 73 includes red light conversion structures 731, green light conversion structures 731, and transparent insulating structures 734; the transparent insulating structure 734 is for transmitting blue light.
When the backlight is white light, as shown in fig. 19, the plurality of light conversion structures 73 includes a red light conversion structure 731, a green light conversion structure 732, and a blue light conversion structure 733. So that the red light conversion structure 731 is excited by the incident light and can emit red light; the green light conversion structure 732 may emit green light when excited by incident light; the blue light conversion structure 733 may emit blue light when excited by incident light.
In the case where the backlight is blue light, as shown in fig. 20, the plurality of light conversion structures 73 includes a red light conversion structure 731, a green light conversion structure 731, and a transparent insulating structure 734. So that the red light conversion structure 731 is excited by the incident light and can emit red light; the green light converting structure 731 is excited by incident light and can emit green light; the transparent insulating structure 734 may transmit blue light directly.
For example, the material of the transparent insulating unit 734 may be an inorganic insulating material including silicon nitride.
An embodiment of the present invention further provides a method for manufacturing a substrate, as shown in fig. 21, including:
s10, referring to fig. 4 to 9, a plurality of first touch electrodes 721 arranged at intervals and a plurality of second touch electrodes 722 arranged at intervals are sequentially formed on the substrate 70; the first and second touch electrodes 721 and 722 cross each other.
The first touch electrode 721 and the second touch electrode 722 form a touch structure.
The method for manufacturing a substrate further includes:
s20, referring to fig. 4-9, before forming the second touch electrode 722, forming a retaining wall 71, the retaining wall 71 defining a plurality of opening regions 701; one light conversion structure 73 is formed in the plurality of opening regions 701 in a one-to-one correspondence; the first touch electrode 721 and the second touch electrode 722 are insulated at their crossing positions by the light conversion structure 73.
Optionally, the first touch electrode 721 and the second touch electrode 722 are both in a grid structure, and the first touch electrode 721 and the second touch electrode 722 are both made of a metal material.
For example, the material of the first touch electrode 721 and the second touch electrode 722 may be a transparent conductive metal material including nano silver (Ag).
The shape of the mesh in the mesh structure may be a regular polygon or an irregular polygon, for example, the mesh structure may be a plurality of rhombic meshes formed by intersecting a plurality of metal wires. The mesh structure transmits light, and allows light to enter the light conversion unit 73 from the substrate 70 and exit to the side away from the substrate 70.
It should be noted that, one skilled in the art can obtain a plurality of opening regions 701 defined by the retaining walls 71 according to the arrangement of the sub-pixels.
For example, referring to fig. 7-9, in the case that the colors of the same row of sub-pixels arranged along the vertical direction Y are different, the retaining wall 71 may be formed behind the first touch electrode 721, the retaining wall 71 is located on the side of the first touch electrode 721 away from the substrate 70, the adjacent first touch electrodes 721 are separated by the retaining walls 71, the retaining walls 71 are in a grid shape, and the open regions 701 correspond to the sub-pixels one by one. Then, the light conversion structures 73 are formed in the opening area 701, the light conversion structures 73 correspond to the sub-pixels one by one, and the color of light emitted by one light conversion structure 73 is the same as that of the corresponding sub-pixel. A second touch electrode 722 is formed on the side of the photo-conversion structure 73 and the retaining wall 71 away from the substrate 70.
Referring to fig. 4 to 6, in the case where the same column of sub-pixels arranged in the vertical direction Y have the same color, the blocking wall 71 may be formed before the first touch electrode 721 is formed, the opening area 701 defined by the blocking wall 71 on the substrate may correspond to a plurality of sub-pixels, and the color of the plurality of sub-pixels located in one opening area 701 is the same. Then, the first touch electrode 721 and the light conversion structures 73 are sequentially formed in the opening area 701, the light conversion structures 73 correspond to a same column of sub-pixels with the same color, and the color of light emitted by one light conversion structure 73 is the same as the color of the sub-pixel in the corresponding column. A second touch electrode 722 is formed on the side of the photo-conversion structure 73 and the retaining wall 71 away from the substrate 70.
Embodiments of the present invention provide a method for manufacturing a substrate, in which a first touch electrode 721 and a second touch electrode 722 are insulated at their crossing positions by a photo-conversion structure 73, so that an insulating layer is not required to be formed between the first touch electrode 721 and the second touch electrode 722, thereby simplifying a manufacturing process. Moreover, the light conversion structure 73 can convert the color of the light entering the light conversion structure to emit colored light, so that the substrate has both the light conversion function and the touch function, and the actual application range is widened. When the substrate is applied to a display device, embedded touch can be realized.
Alternatively, the bank 71 is formed before the first touch electrode 721; the retaining wall 71 includes a plurality of sub-retaining walls 711 arranged at intervals, and the extending direction of the sub-retaining walls 711 is the same as the extending direction of the first touch electrode 721; an area between any adjacent sub-retaining walls 711 is an open area 701.
On this basis, the first touch electrode 721 is formed, including: referring to fig. 10 to 14, first touch electrodes 721 are formed in the opening regions 701 in a one-to-one correspondence by an inkjet printing process; the height of the sub-barriers 711 is higher than that of the first touch electrode 721.
It can be understood that the adjacent first touch electrodes 721 are isolated by the sub-barriers 711. Also, the orthographic projection of the light conversion structure 73 located in one opening area 701 on the substrate 70 covers the first touch electrode 721.
Since one light conversion structure 73 emits light of one color, the sub-pixels in the region of one light conversion structure 73 have the same color, and can emit light by sharing one light conversion structure 73, thereby simplifying the production process and saving the cost.
Optionally, the second touch electrode 722 includes a plurality of first sub-electrodes 7221 along the extending direction of the second touch electrode 722, and a second sub-electrode 7222 for connecting any two adjacent first sub-electrodes 7221 in the extending direction of the second touch electrode 722.
On this basis, forming the retaining wall 71 includes: as shown in fig. 23 to 24, the bank 71 including a plurality of sub-banks 711 arranged at intervals is formed using a gray-scale mask, wherein the sub-banks 711 have grooves 712 in regions corresponding one-to-one to the second sub-electrodes 7222 to be formed.
Taking a positive photoresist as an example, the gray-scale mask plate can comprise an opaque part, a semi-transparent part and a transparent part, after the photoresist is exposed, the photoresist completely reserved part corresponds to the opaque part of the gray-scale mask plate, the photoresist semi-reserved part corresponds to the semi-transparent part of the gray-scale mask plate, and the photoresist completely removed part corresponds to the transparent part of the gray-scale mask plate. As shown in fig. 25, a retaining wall film 710 may be formed on the substrate 70 through a deposition process. And coating photoresist on the surface of the retaining wall film 710, performing exposure, development and etching by using a gray scale mask plate, and removing the photoresist to completely remove part of the corresponding retaining wall film 710 to form a retaining wall pattern 7101. The bank pattern 7101 is located in a region where the sub-banks 711 are to be formed. On this basis, the half-remaining photoresist is removed by an ashing process, the exposed retaining wall pattern 7101 is etched, so that the upper surface of the retaining wall pattern 7101 in the region where the second sub-electrode 7222 is to be formed is recessed toward the substrate 70 to form a groove 712, and then the photoresist of the photoresist full-remaining portion is removed by a stripping process to form the sub-retaining wall 711, thereby obtaining the retaining wall 71 including the plurality of sub-retaining walls 711 arranged at intervals.
It is understood that the retaining wall 71 including the plurality of sub-retaining walls 711 arranged at intervals can also be formed by a half-exposure photolithography process, similar to the above process using the gray-scale mask, and will not be described herein again.
As shown in fig. 22, forming the second touch electrode 722 includes:
s12, as shown in fig. 25, a second sub-electrode 7222 is formed in the groove 712.
For example, the material of the second sub-electrode 7222 may be a metal material including silver, aluminum, or the like.
S13, as shown in fig. 25, forming a drain structure 713 on a side of the groove 712 away from the second sub-electrode 7222; the drainage structure 713 has lyophilic properties; a gap exists between the side of the flow guiding structure 713 and the sub-retaining wall 711.
S14, as shown in fig. 25, forming a first sub-electrode 7221 on a side of the light conversion structure 73 away from the substrate 70 in a direction in which the second touch electrode 722 is to be formed by an inkjet printing process; the first sub-electrode 7221 is electrically connected to the second sub-electrode 7222 through a gap.
The sub-retaining wall 711 has lyophobicity.
Optionally, the first sub-electrode 7221 has a mesh structure, and the first sub-electrode 7221 transmits light.
As an example, a transparent conductive metal material including nano silver or the like may be used as the material of the first sub-electrode 7221.
As shown in fig. 25, by using an inkjet printing process, ink 7220 containing a material of the first sub-electrode 7221 is dropped on the side of the light conversion structure 73 away from the substrate 70 in the direction in which the second touch electrode 722 is to be formed, the drainage structures 713 may generate a pulling effect on the ink 7220, and during the drying process of the ink 7220, the drainage structures 713 on both sides of the ink 7220 may elongate the ink 7220 in the direction in which the second touch electrode 722 is to be formed, so that the ink 7220 enters the gap between the side surface of the drainage structure 713 and the sub-barrier wall 711 and contacts the second sub-electrode 7222. After the ink 7220 is dried, the first sub-electrode 7221 is obtained. Along the extending direction of the second touch electrode 722, the adjacent first sub-electrode 7221 is electrically connected to the second sub-electrode 7222, so that the second touch electrode 722 is turned on.
Note that the ink containing the material of the first sub-electrode 7221 and the drain structure 713 are mutually compatible.
One skilled in the art can form the first sub-electrode 7221 by controlling the amount of ink 7220 and the position of the landing point via the flow guiding structure 713.
Optionally, referring to fig. 17, the method for manufacturing the substrate further includes forming a buffer layer 74 between the first touch electrode 721 and the light conversion structure 73; the orthographic projection of the buffer layer 74 on the substrate 70 covers the first touch electrode 721. So that the material to form the light conversion structure 73 can be effectively spread on the buffer layer 74, thereby improving the uniformity of the light conversion structure 73.
For example, the material of the buffer layer 74 may be an inorganic material including silicon nitride, silicon oxide, and the like.
Optionally, referring to fig. 18, the method for manufacturing the substrate further includes forming a protective layer 75 on a side of the second touch electrode 722 away from the substrate 70. Thereby preventing the substrate from being damaged.
As an example, the material of the protective layer 80 may be an organic material.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. A substrate, comprising: the touch screen comprises a substrate, a retaining wall and a touch structure, wherein the retaining wall and the touch structure are arranged on the substrate;
the touch structure comprises a plurality of first touch electrodes arranged at intervals and a plurality of second touch electrodes arranged at intervals; the first touch electrode and the second touch electrode are mutually crossed, and the first touch electrode is closer to the substrate relative to the second touch electrode; the second touch electrode comprises a plurality of first sub-electrodes along the extension direction of the second touch electrode and a second sub-electrode used for connecting any two adjacent first sub-electrodes along the extension direction of the second touch electrode;
the retaining wall defines a plurality of opening areas, and the plurality of opening areas are provided with one light conversion structure in a one-to-one correspondence manner; wherein the first touch electrode and the second touch electrode are insulated at their crossing positions by the light conversion structure;
the retaining wall comprises a plurality of sub retaining walls which are arranged at intervals, and the extending direction of the sub retaining walls is the same as that of the first touch electrode; the area between any adjacent sub retaining walls is the opening area;
a plurality of grooves are formed in the sub-retaining wall, and the second sub-electrodes are correspondingly positioned in one groove one by one;
a drainage structure is further arranged on one side of the groove, which is far away from the second sub-electrode, a gap is formed between the side surface of the drainage structure and the retaining wall, and the first sub-electrode is electrically connected with the second sub-electrode through the gap; the drainage structure has lyophilic properties;
wherein, the sub-retaining wall has lyophobic property; the first sub-electrode is formed by adopting an ink-jet printing process, and ink containing the material of the first sub-electrode and the drainage structure are mutually compatible.
2. The substrate of claim 1, wherein the first touch electrodes are located in one of the opening regions in a one-to-one correspondence; the height of the sub-retaining wall is higher than that of the first touch electrode.
3. The substrate according to claim 1, further comprising a buffer layer disposed between the first touch electrode and the light conversion structure; the orthographic projection of the buffer layer on the substrate covers the first touch electrode.
4. The substrate of claim 1, further comprising a protection layer disposed on a side of the second touch electrode away from the substrate.
5. The substrate according to claim 1, wherein the thickness of the retaining wall is 8-12 μm;
and/or the thickness of the drainage structure is 2-3 mu m;
and/or the thickness of the second sub-electrode is 2000-3000A.
6. The substrate of claim 1, wherein the plurality of light conversion structures comprise a red light conversion structure, a green light conversion structure, and a blue light conversion structure;
or,
the plurality of light conversion structures comprise a red light conversion structure, a green light conversion structure and a transparent insulation structure; the transparent insulating structure is used for transmitting blue light.
7. A display panel comprising the substrate according to any one of claims 1 to 6.
8. A method of preparing a substrate, comprising:
sequentially forming a plurality of first touch electrodes arranged at intervals and a plurality of second touch electrodes arranged at intervals on a substrate; the first touch electrode and the second touch electrode are mutually crossed; the second touch electrode comprises a plurality of first sub-electrodes along the extension direction of the second touch electrode and a second sub-electrode used for connecting any two adjacent first sub-electrodes along the extension direction of the second touch electrode;
before forming the second touch electrode, the method for preparing the substrate further includes: forming a retaining wall, wherein the retaining wall defines a plurality of opening areas; forming a light conversion structure in the plurality of opening areas in a one-to-one correspondence manner; wherein the first touch electrode and the second touch electrode are insulated at their crossing positions by the light conversion structure;
the retaining wall is formed in front of the first touch electrode; the retaining wall comprises a plurality of sub retaining walls which are arranged at intervals, and the extending direction of the sub retaining walls is the same as that of the first touch electrode; the area between any adjacent sub retaining walls is the opening area;
forming the retaining wall, comprising: forming the retaining wall comprising a plurality of sub-retaining walls which are arranged at intervals by using a gray scale mask plate, wherein the sub-retaining walls are provided with grooves in regions which correspond to the second sub-electrodes to be formed one by one;
forming the second touch electrode includes:
forming the second sub-electrode in the groove;
forming a drainage structure on one side of the groove far away from the second sub-electrode; the drainage structure has lyophilic properties; a gap is formed between the side surface of the drainage structure and the sub-retaining wall;
forming the first sub-electrode on one side of the light conversion structure far away from the substrate along the direction of the second touch electrode to be formed by adopting an ink-jet printing process; the first sub-electrode is electrically connected with the second sub-electrode through the gap;
wherein the sub-retaining wall has lyophobic property; the ink comprising the material of the first sub-electrode is mutually compatible with the drainage structure.
9. The method of claim 8, wherein forming the first touch electrode comprises: forming the first touch electrodes in the opening area in a one-to-one correspondence manner by adopting an ink-jet printing process; the height of the sub-retaining wall is higher than that of the first touch electrode.
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