CN114489385B - Touch display panel, manufacturing method thereof and display device - Google Patents
Touch display panel, manufacturing method thereof and display device Download PDFInfo
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- CN114489385B CN114489385B CN202210147399.0A CN202210147399A CN114489385B CN 114489385 B CN114489385 B CN 114489385B CN 202210147399 A CN202210147399 A CN 202210147399A CN 114489385 B CN114489385 B CN 114489385B
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- 238000004519 manufacturing process Methods 0.000 title claims description 26
- 239000011241 protective layer Substances 0.000 claims abstract description 212
- 239000010410 layer Substances 0.000 claims abstract description 203
- 239000000758 substrate Substances 0.000 claims abstract description 112
- 238000000034 method Methods 0.000 claims description 48
- 230000008569 process Effects 0.000 claims description 36
- 238000000059 patterning Methods 0.000 claims description 21
- 238000002834 transmittance Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 230000001965 increasing effect Effects 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229920002120 photoresistant polymer Polymers 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 206010040844 Skin exfoliation Diseases 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
Classifications
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- 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
- G06F3/0412—Digitisers structurally integrated in a display
-
- 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
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
Abstract
The touch display panel in this embodiment includes display substrate, the touch layer, first protective layer and second protective layer, display substrate includes the display area and is located the fan-out district of display area one side, the touch sets up in one side of display substrate and extends to the fan-out district by the display area, first protective layer sets up in the touch layer one side of keeping away from display substrate and covers display area and partial fan-out district, the second protective layer sets up in one side of keeping away from display substrate at first protective layer, the orthographic projection of second protective layer on display substrate is located the fan-out district that first protective layer covered, the thickness of second protective layer in display substrate to touch layer orientation is less than or equal to 1.5 microns. Through setting up first protective layer and second protective layer, when having guaranteed that the sum of the thickness of first protective layer and second protective layer can satisfy isolated steam function, also can reduce the section difference between fan-out district and display area after the polaroid is attached through reducing the thickness of second protective layer to avoid appearing the bubble line.
Description
Technical Field
The application relates to the technical field of display, in particular to a touch display panel, a manufacturing method thereof and a display device.
Background
With the development of technology, display screens with touch control function are increasingly widely used. The conventional touch display screen generally includes a display substrate and a touch layer disposed on the display substrate, where the touch layer extends from the display area to the fan-out area. The polarizer is attached to the touch layer to protect the touch layer and realize optical functions, and the polarizer does not cover part of the touch layer in the fan-out area so as to facilitate bonding connection between the touch layer and the control chip. In order to prevent the corrosion of the contact layer at the bonding position caused by the water oxygen in the air, a protective layer is arranged on part of the contact layer in the fan-out area, then a polaroid is attached, and the polaroid covers part of the protective layer and the contact layer in the display area.
However, since the protective layer has a certain thickness, that is, a step difference is formed between the protective layer and the touch layer, the polarizer is not flat after being attached, and a bubble line appears on a macroscopic scale at the edge of the fan-out area, which is close to the display area, which affects the appearance of the display panel. If the bubble line is avoided by reducing the thickness of the protective layer, the function of isolating water vapor of the protective layer is affected. Therefore, preventing occurrence of bubble lines while ensuring the function of the protective layer to isolate water and oxygen is a technical problem to be solved in the art.
Disclosure of Invention
The application provides a touch display panel, a manufacturing method thereof and a display device aiming at the defects of the existing mode, and is used for solving the problems of poor appearance and poor water vapor isolation effect of a touch display screen in the prior art.
In a first aspect, an embodiment of the present application provides a touch display panel, including:
the display substrate comprises a display area and a fan-out area positioned at one side of the display area;
the touch control layer is arranged on one side of the display substrate and extends from the display area to the fan-out area;
the first protection layer is arranged on one side, far away from the display substrate, of the touch control layer, and covers the display area and part of the fan-out area so as to expose part of the touch control layer, far away from the display area, in the fan-out area;
the second protection layer is arranged on one side, far away from the display substrate, of the first protection layer, and orthographic projection of the second protection layer on the display substrate is positioned in the fan-out area covered by the first protection layer;
the thickness of the second protective layer in the direction from the display substrate to the touch control layer is smaller than or equal to 1.5 micrometers.
Optionally, the display device comprises a polarizer, wherein the polarizer is attached to one side of the first protective layer and one side of the second protective layer, which is far away from the display substrate, and the polarizer covers the display area and part of the second protective layer;
the thickness of the first protective layer in the direction from the display substrate to the touch layer is greater than or equal to 1.5 micrometers and less than or equal to 2 micrometers.
Optionally, in a direction from the display substrate to the touch layer, a sum of thicknesses of the first protective layer and the second protective layer is greater than or equal to 3 micrometers and less than or equal to 3.5 micrometers; or, in the direction from the display substrate to the touch layer, the sum of the thicknesses of the first protective layer and the second protective layer is greater than or equal to 2.5 micrometers and less than or equal to 3 micrometers.
Optionally, in a direction from the display substrate to the touch layer, a thickness of the first protective layer is greater than or equal to 0.5 micrometers and less than or equal to 1 micrometer.
Optionally, in a direction from the display substrate to the touch layer, a sum of thicknesses of the first protective layer and the second protective layer is greater than or equal to 2 micrometers and less than or equal to 2.5 micrometers.
Optionally, the fan-out area includes a first fan-out area and a second fan-out area, the second fan-out area is located at a side of the first fan-out area away from the display area, and the second fan-out area is a binding area;
the first protection layer covers the first fan-out area, and the second protection layer covers the first fan-out area.
In a second aspect, embodiments of the present application provide a display device, including a touch display panel in embodiments of the present application.
In a third aspect, an embodiment of the present application provides a method for manufacturing a touch display panel, including:
providing a display substrate, wherein the display substrate comprises a display area and a fan-out area positioned at one side of the display area;
manufacturing a touch control layer on one side of the display substrate through a composition process, wherein the touch control layer extends from the display area to the fan-out area;
manufacturing a first protection layer on one side of the touch control layer far away from the display substrate through a patterning process, so that the first protection layer covers the display area and part of the fan-out area;
manufacturing a second protective layer on one side, far away from the display substrate, of the first protective layer through a patterning process, wherein orthographic projection of the second protective layer on the display substrate is positioned in the fan-out area covered by the first protective layer; the thickness of the second protective layer in the direction from the display substrate to the touch control layer is smaller than or equal to 1.5 micrometers.
Optionally, after the first protective layer is fabricated on a side, away from the display substrate, of the touch layer through a patterning process, before the second protective layer is fabricated on a side, away from the display substrate, of the first protective layer through a patterning process, the method further includes:
baking the first protective layer according to a preset first technological parameter;
after the second protective layer is manufactured on the side, far away from the display substrate, of the first protective layer through the patterning process, the method further comprises the following steps:
and baking the second protective layer according to preset second technological parameters.
Optionally, the first process parameter includes: the baking temperature is 130-150 degrees, and the baking time is 20-30 minutes; and/or, the second process parameters include: the baking temperature is 130 DEG to 150 DEG, and the baking time is 20 minutes to 30 minutes.
The beneficial technical effects that technical scheme that this application embodiment provided brought include:
the touch display panel in this embodiment includes display substrate, the touch layer, first protective layer and second protective layer, display substrate includes the display region and is located the fan-out district of display region one side, the touch layer sets up in one side of display substrate and extends to the fan-out district by the display region, first protective layer sets up in the touch layer and keeps away from one side of display substrate and cover display region and partial fan-out district, the second protective layer sets up in one side that display substrate was kept away from to first protective layer, the orthographic projection of second protective layer on display substrate is located the fan-out district that first protective layer covered, the thickness of second protective layer in display substrate to touch layer orientation is less than or equal to 1.5 microns. Through setting up first protective layer and second protective layer, when having guaranteed that the sum of the thickness of first protective layer and second protective layer can satisfy isolated steam function, also can reduce the polaroid through reducing the thickness of second protective layer and attach the back in fan-out district and the section difference between the display area to avoid appearing the bubble line, improved touch display panel's outward appearance from this.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic top view of a touch display panel according to the related art;
FIG. 2 is a schematic cross-sectional view of a touch display panel according to the related art;
fig. 3 is a schematic top view of a touch display panel according to an embodiment of the disclosure;
fig. 4 is a schematic cross-sectional structure of a touch display panel according to an embodiment of the disclosure;
FIG. 5 is a schematic top view of the touch display panel without the second protective layer and the polarizer according to the embodiment of the present application;
FIG. 6 is a schematic top view of a touch display panel without a polarizer according to an embodiment of the present disclosure;
fig. 7 is a flow chart illustrating a manufacturing process of a touch display panel according to an embodiment of the present disclosure;
fig. 8a to 8e are schematic structural diagrams illustrating different processes of manufacturing a touch display panel according to an embodiment of the present disclosure.
In the figure:
10-a touch display panel; 101-a display area; 102-a fan-out area; 1021-a first fan-out section; 1022-a second fan-out section; 11-a display substrate; 12-a touch layer; 13-a protective layer; 131-a first protective layer; 132-a second protective layer; 14-a polarizer; 20-bubble line; 21-an external driving circuit.
Detailed Description
Examples of embodiments of the present application are illustrated in the accompanying drawings, in which like or similar reference numerals refer to like or similar elements or elements having like or similar functionality throughout. Further, if detailed description of the known technology is not necessary for the illustrated features of the present application, it will be omitted. The embodiments described below by referring to the drawings are exemplary only for the purpose of illustrating the present application and are not to be construed as limiting the present application.
It will be understood by those skilled in the art that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. The term "and/or" as used herein includes all or any element and all combination of one or more of the associated listed items.
Referring to fig. 1 and 2, a conventional touch display panel 10 generally includes a display substrate 11 and a touch layer 12 disposed on the display substrate 11, wherein the touch layer 12 extends from a display area 101 to a fan-out area 102. The polarizer 14 is attached to the touch layer 12 to protect the touch layer 12 and realize an optical function, and the polarizer 14 does not cover a part of the touch layer 12 in the fan-out area 102, so that the touch layer 12 in the fan-out area 102 is conveniently bonded and connected with the external driving circuit 21. In order to prevent the oxygen in the air from corroding the touch layer 12 at the bonding position, a protective layer 13 is arranged on a part of the touch layer 12 in the fan-out area 102, then a polaroid 14 is attached to the protective layer 13 and the touch layer 12, and the polaroid 14 covers a part of the protective layer 13 and the touch layer 12 in the display area 101.
The inventors of the present application considered that, since the protective layer 13 has a certain thickness, that is, in the second direction in fig. 2, there is a step between the surface of the protective layer 13 and the surface of the touch layer 12, the polarizer 14 is not flat after being attached (there is a certain gap between the polarizer 14 and the surface of the touch layer 12), and as shown in fig. 1 and 2, it appears macroscopically that a bubble line 20 appears at the edge of the fan-out area near the display area, which affects the appearance of the display panel. If the step is reduced by reducing the thickness of the protective layer 13 in the second direction, the bubble lines are avoided (which can be generally eliminated when the thickness of the protective layer 13 is below 1.5 μm), and the function of insulating the protective layer 13 from moisture is affected.
The application provides a touch display panel, a manufacturing method thereof and a display device, and aims to solve the technical problems in the prior art.
The embodiment of the present application provides a touch display panel 10, and referring to fig. 3, 4, 5 and 6, the touch display panel 10 includes:
a display substrate 11 including a display area 101 and a fan-out area 102 located at one side of the display area 101;
the touch control layer 12 is arranged on one side of the display substrate 11 and extends from the display area 101 to the fan-out area 102;
the first protection layer 131 is arranged on one side of the touch control layer 12 far away from the display substrate 11, and the first protection layer 131 covers the display area 101 and part of the fan-out area 102 and exposes part of the touch control layer 12 in the fan-out area 102 far away from the display area 101;
the second protection layer 132 is arranged on one side of the first protection layer 131 away from the display substrate 11, and the orthographic projection of the second protection layer 132 on the display substrate 11 is positioned in the fan-out area 102 covered by the first protection layer 131;
the thickness of the second protection layer 132 in the direction from the display substrate 11 to the touch layer 12 is less than or equal to 1.5 micrometers.
Specifically, as shown in fig. 3 to 6, the display substrate 11 includes a display area 101 and a fan-out area 102 at the side of the display area 101. The display substrate 11 is provided with a touch layer 12, and the material of the touch layer 12 includes indium tin oxide and other materials with good conductive performance and light transmittance. The touch layer 12 forms staggered grid lines after a patterning process, and extends from the display area 101 to the fan-out area 102, and the touch layer 12 in the fan-out area 102 is bonded and connected with the external driving circuit 21 to realize a touch function. The first protection layer 131 is disposed on a side of the touch layer 12 away from the display substrate 11, and covers the display area 101 (covering the touch layer 12 in the display area 101) and a portion of the fan-out area 102 (covering a portion of the touch layer 12 in the fan-out area 102). The second protection layer 132 is disposed on a side of the first protection layer 131 away from the display substrate 11, where the orthographic projection of the second protection layer 132 on the display substrate 11 is located in the fan-out area 102 covered by the first protection layer 131, as shown in fig. 4, in the first direction (the direction from the display area 101 to the fan-out area 102), a gap d is formed between the second protection layer 132 and the display area 101, and the size of the gap d can be adjusted according to practical situations. The materials of the first protective layer 131 and the second protective layer 132 may be materials having good light transmittance and adhesion properties, such as photoresist, etc., and may be specifically determined according to practical situations. The thickness of the second protection layer 132 in the direction from the display substrate 11 to the touch layer 12 (i.e., in the second direction in fig. 4) is less than or equal to 1.5 micrometers.
As shown in fig. 4, after the polarizer 14 is attached to the first protective layer 131 and the second protective layer 132, since the thickness of the second protective layer 132 is smaller, that is, the step difference between the second protective layer 132 and the first protective layer 131 is smaller, the polarizer 14 can be completely attached to the first protective layer 131 and the second protective layer 132 (the surfaces of the polarizer 14, the first protective layer 131 and the second protective layer 132 are not gapless), which macroscopically shows that the polarizer 14 will not generate bubble lines 20 in the fan-out area 102 near the display area 101, thereby avoiding influencing the appearance of the touch display substrate 11. Meanwhile, the thickness of the first protection layer 131 is increased, so that the sum of the thicknesses of the first protection layer 131 and the second protection layer 132 can meet the requirement of isolating water and oxygen, the protection performance of the touch control layer 12 in the fan-out area 102 is ensured, and the touch control layer 12 is prevented from being corroded by water vapor. On the other hand, since the two protective layers 13 of the first protective layer 131 and the second protective layer 132 are provided, when the second protective layer 132 is detached due to external force (for example, when the touch display panel is overhauled, the polarizer needs to be torn off, so that the second protective layer is detached), the first protective layer 131 can still protect the touch layer 12 in the fan-out area 102, so that the reliability of the touch display substrate 11 is improved.
Alternatively, in the embodiment of the present application, the polarizer 14 is attached to the first protective layer 131 and the second protective layer 132 on the side far from the display substrate 11, and the polarizer 14 covers the display area 101 and part of the second protective layer 132; the thickness of the first protective layer 131 in the direction from the display substrate 11 to the touch layer 12 is greater than or equal to 1.5 micrometers and less than or equal to 2 micrometers.
Specifically, as shown in fig. 4, the thickness of the first protective layer 131 in the second direction is between 1.5 micrometers and 2 micrometers, and by making the thickness of the first protective layer 131 be 1.5 micrometers or more, degradation of the protective performance due to too small a sum of the thicknesses of the first protective layer 131 and the second protective layer 132 can be avoided. Optionally, the thickness of the first protective layer 131 and the thickness of the second protective layer 132 are both 1.5 micrometers, and the sum of the thicknesses of the first protective layer 131 and the second protective layer 132 is 3 micrometers, so that the bubble line 20 is avoided, and meanwhile, the protection performance of the touch control layer 12 is ensured. At this time, the transmittance of the touch display panel 10 is reduced by about 1%, and when the thickness of the first protective layer 131 is less than 2 μm, the transmittance is prevented from being greatly affected by the excessive thickness.
It should be noted that the thicknesses of the first protective layer 131 and the second protective layer 132 may be adjusted according to practical situations. If the reliability requirement of the customer on the product is high (the service environment of the product is high-temperature and high-humidity environment). It is necessary to improve the protective performance of the protective layer 13 with respect to the touch layer 12, and thus it is necessary to increase the sum of the thicknesses of the first protective layer 131 and the second protective layer 132 by increasing the thickness of the first protective layer 131. Optionally, in the second direction in fig. 4, the thickness of the second protection layer 132 is 1.5 micrometers, so that the bubble lines 20 are avoided, the thickness of the first protection layer 131 is greater than or equal to 1.5 micrometers and less than or equal to 2 micrometers, and the sum of the thicknesses of the first protection layer 131 and the second protection layer 132 is greater than or equal to 3 micrometers and less than or equal to 3.5 micrometers, thereby improving the protection performance of the first protection layer 131 and the second protection layer 132 for the touch layer 12 in the fan-out area 102. In the 8595 test (the touch display panel is put into an environment with the temperature of 85 degrees and the humidity of 85 percent for reliability test), the touch layer cannot be corroded. When the thickness of the first protective layer 131 is greater than or equal to 1.5 micrometers and less than or equal to 2 micrometers, the transmittance of the touch display panel 10 may be reduced by about 1% to 1.5%.
To further reduce the risk of bubble lines 20, the thickness of the second protective layer 132 needs to be further reduced. Optionally, the thickness of the second protection layer 132 is greater than or equal to 1 micron and less than or equal to 1.5 microns, and the thickness of the first protection layer 131 is 1.5 microns, so that the sum of the thicknesses of the first protection layer 131 and the second protection layer 132 is greater than or equal to 2.5 microns and less than or equal to 3 microns. Therefore, the risk of generating the bubble line 20 is eliminated, and meanwhile, the protection performance of the touch layer 12 in the fan-out area 102 can be ensured.
If the transmittance of the product is required to be high, the thickness of the first protective layer 131 needs to be reduced. Alternatively, in the direction from the display substrate 11 to the touch layer 12 (the second direction in fig. 4), the thickness of the first protective layer 131 is greater than or equal to 0.5 μm and less than or equal to 1 μm, and at this time, the transmittance of the touch display panel 10 is reduced by about 0.5%. It should be noted that, since the second protection layer 132 is located in the fan-out area 102, increasing the thickness of the second protection layer 132 has no effect on the transmittance of the touch display substrate 11. Alternatively, the thickness of the second protection layer 132 is made to be 1.5 micrometers, so that the sum of the thicknesses of the first protection layer 131 and the second protection layer 132 in the direction from the display substrate 11 to the touch layer 12 (the second direction in fig. 4) is greater than or equal to 2 micrometers and less than or equal to 2.5 micrometers. Thereby, while reducing the risk of occurrence of the bubble line 20, deterioration of the protection performance due to the too small sum of the thicknesses of the first protection layer 131 and the second protection layer 132 is avoided.
In the embodiment of the present application, as shown in fig. 3 and 4, the fan-out area 102 includes a first fan-out area 1021 and a second fan-out area 1022, the second fan-out area 1022 is located at one side of the first fan-out area 1021 away from the display area 101, the second fan-out area 1022 is a binding area, and the touch control layer 12 located in the second fan-out area 1022 is electrically connected to the external driving circuit 21. The first protection layer 131 covers the first fan-out area 1021, and the second protection layer 132 covers the first fan-out area 1021. Specifically, the second protection layer 132 includes a first end and a second end that are relatively distributed along the direction from the fan-out area 102 to the display area 101, and the first end of the second protection layer 132 is flush with the first protection layer 131. Accordingly, the area of the second protective layer 132 covering the first protective layer 131 may be increased, thereby enhancing the protection capability of the touch layer 12 within the fan-out area 102. The specific position and area of the second protective layer 132 can be adjusted according to practical situations.
Based on the same inventive concept, the embodiment of the present application also provides a display device, which includes the touch display panel 10 provided in the embodiment of the present application. Since the display device includes the touch display panel 10 provided in the embodiments of the present application, the display device has the same beneficial effects as the touch display panel 10, and will not be described herein. The display device can be a tablet personal computer or a mobile phone, and the like, and can be specifically determined according to actual conditions.
Based on the same inventive concept, the embodiment of the present application further provides a method for manufacturing the touch display panel 10, as shown in fig. 7, including:
s101, providing a display substrate, wherein the display substrate comprises a display area and a fan-out area positioned at one side of the display area;
s102, manufacturing a touch layer on one side of a display substrate through a composition process, wherein the touch layer extends from a display area to a fan-out area;
s103, manufacturing a first protection layer on one side of the touch control layer far away from the display substrate through a composition process, so that the display area and part of the fan-out area are covered by the first protection layer;
s104, manufacturing a second protective layer on one side, far away from the display substrate, of the first protective layer through a patterning process, wherein orthographic projection of the second protective layer on the display substrate is positioned in the fan-out area 102 covered by the first protective layer; the thickness of the second protective layer in the direction from the display substrate to the touch control layer is less than or equal to 1.5 micrometers.
In the manufacturing method provided in this embodiment, after the polarizer 14 is attached to the first protective layer 131 and the second protective layer 132 by setting the first protective layer 131 and the second protective layer 132, the thickness of the second protective layer 132 is smaller, that is, the step difference between the second protective layer 132 and the first protective layer 131 is smaller, so that the polarizer 14 can be completely attached to the first protective layer 131 and the second protective layer 132 (the surfaces of the polarizer 14 and the first protective layer 131 and the second protective layer 132 are gapless), and the appearance that the polarizer 14 is close to the display area 101 in the fan-out area 102 is macroscopically shown as no bubble line appears, thereby avoiding influencing the appearance of the touch display substrate 11. Meanwhile, the sum of the thicknesses of the first protective layer 131 and the second protective layer 132 can also meet the water and oxygen blocking requirement by increasing the thickness of the first protective layer 131, so that the protective performance of the touch layer 12 in the fan-out area 102 is ensured, and the touch layer 12 is prevented from being corroded by water vapor. On the other hand, since the two protective layers 13 of the first protective layer 131 and the second protective layer 132 are provided, when the second protective layer 132 falls off due to the external force, the first protective layer 131 can still protect the touch layer 12 in the fan-out area 102, so that the reliability of the touch display substrate 11 is improved.
In a specific embodiment, after the first protective layer 131 is fabricated on the side of the touch layer 12 away from the display substrate 11 through the patterning process, before the second protective layer 132 is fabricated on the side of the first protective layer 131 away from the display substrate 11 through the patterning process, the method further includes:
baking the first protective layer according to a preset first technological parameter;
after the second protective layer is manufactured on the side, far away from the display substrate, of the first protective layer through a patterning process, the method further comprises the following steps:
the second passivation layer 132 is baked according to a predetermined second process parameter.
Optionally, the first process parameter includes: the baking temperature is 140 degrees, and the baking time is 25 minutes; and/or, the second process parameters include: the baking temperature was 140℃and the baking time was 25 minutes.
The following describes in detail the specific process of manufacturing the touch display panel 10 in the embodiment of the present application with reference to the accompanying drawings. It should be noted that, the patterning process in the embodiments of the present application includes a process of coating, exposing, developing, etching, and removing part or all of the photoresist.
As shown in fig. 8a, a display substrate 11 is provided first, and the display substrate 11 includes a display area 101 and a fan-out area 102 located at one side of the display area 101. The display substrate 11 may be a liquid crystal display substrate 11, an OLED display substrate 11, or the like, and may be specifically determined according to the actual situation.
As shown in fig. 8b, next, a touch layer 12 is fabricated on one side of the display substrate 11 by patterning process, and the touch layer 12 extends from the display area 101 to the fan-out area 102. The touch layer 12 is patterned to form staggered grid lines, and extends from the display area 101 to the fan-out area 102. The material of the touch layer 12 includes a material having good conductive performance and light transmittance such as indium tin oxide, and may be specifically determined according to practical situations.
As shown in fig. 8c, a first protective layer 131 is then fabricated on a side of the touch layer 12 away from the display substrate 11 by patterning, such that the first protective layer 131 covers the display area 101 and a portion of the fan-out area 102, the first protective layer 131 covers the touch layer 12 in the display area 101 and the first fan-out area 1021, and the touch layer 12 in the second fan-out area 1022 (i.e. bonding area) is exposed, so as to facilitate bonding connection with an external driving circuit (not shown in fig. 8 c). The first protective layer 131 may be made of a material having good light transmittance and adhesion properties, such as photoresist, etc., and may be specifically determined according to practical situations. After that, the first protective layer 131 is subjected to a baking treatment to improve the hardness and adhesion of the first protective layer 131. Therefore, when the polarizer 14 is torn off when the touch display panel 10 is overhauled, the risk of the first protective layer 131 falling off is reduced. The baking temperature is 130 DEG to 150 DEG, and the baking time is 20 minutes to 30 minutes. Optionally, the baking temperature may be 140 °, and may be specifically adjusted according to practical situations.
As shown in fig. 8d, a second protection layer 132 is then fabricated on the side of the first protection layer 131 away from the display substrate 11 by patterning process, so that the orthographic projection of the second protection layer 132 on the display substrate 11 is located in the fan-out area 102 covered by the first protection layer 131, and the thickness of the second protection layer 132 in the direction from the display substrate 11 to the touch layer 12 (the second direction in fig. 8 d) is less than or equal to 1.5 micrometers. The second protective layer 132 may be made of a material having good light transmittance and adhesion properties, such as photoresist. It should be noted that, when the first protection layer 131 is manufactured by the patterning process, an alignment mark is left on the first protection layer 131, so when the second protection layer 132 is manufactured, the mask is aligned with the alignment mark, and then the second protection layer 132 is manufactured by the patterning process, so that the alignment accuracy of the first protection layer 131 and the second protection layer 132 can be ensured, and the first end (the end far from the display area 101 in fig. 8 d) of the second protection layer 132 is flush with the first protection layer 131. After that, the first protective layer 131 and the second protective layer 132 are baked to improve the hardness and adhesion of the first protective layer 131 and the second protective layer 132. The baking temperature is 130 DEG to 150 DEG, and the baking time is 20 minutes to 30 minutes. Optionally, the baking temperature may be 140 °, after the first protective layer 131 is baked twice (the time of baking twice is 25 minutes, the temperature is 140 °), the hardness in the pencil hardness test may reach F, and the adhesion between the first protective layer 131 and the touch layer 12 in the fan-out area 102 may reach 5B (obtained by the hundred-cell test), thereby improving the scratch resistance of the first protective layer 131, reducing the risk of peeling the first protective layer 131 from the touch layer 12, and improving the protection capability of the first protective layer 131.
As shown in fig. 8e, the polarizer 14 is attached to the first protective layer 131 and the second protective layer 132, and the touch layer 12 in the bonding region is bonded to the external driving circuit 21, so as to complete the manufacturing of the touch display panel 10.
By applying the embodiment of the application, at least the following beneficial effects can be realized:
1. in the embodiment of the application, after the polarizer 14 is attached to the first protective layer 131 and the second protective layer 132 by setting the first protective layer 131 and the second protective layer 132, the thickness of the second protective layer 132 is smaller, that is, the step difference between the second protective layer 132 and the first protective layer 131 is smaller, so that the polarizer 14 can be completely attached to the first protective layer 131 and the second protective layer 132 (the surfaces of the polarizer 14, the first protective layer 131 and the second protective layer 132 are gapless), and the appearance that the polarizer 14 is close to the display area 101 in the fan-out area 102 is macroscopically shown as the bubble line 20 cannot appear in the touch display substrate 11 is avoided. Meanwhile, the sum of the thicknesses of the first protective layer 131 and the second protective layer 132 can meet the requirement by increasing the thickness of the first protective layer 131, so that the protective performance of the touch layer 12 in the fan-out area 102 is ensured, and the touch layer 12 is prevented from being corroded by water vapor. On the other hand, since the two protective layers 13 of the first protective layer 131 and the second protective layer 132 are provided, when the second protective layer 132 falls off due to the external force, the first protective layer 131 can still protect the touch layer 12 in the fan-out area 102, so that the reliability of the touch display substrate 11 is improved.
2. In some embodiments of the present application, by making the thickness of the first protective layer 131 and the thickness of the second protective layer 132 both 1.5 micrometers, the sum of the thicknesses of the first protective layer 131 and the second protective layer 132 is 3 micrometers, while avoiding the generation of the bubble line 20, the protection performance for the touch layer 12 is also ensured.
3. In some embodiments of the present application, the protection performance of the first protection layer 131 and the second protection layer 132 with respect to the touch layer 12 in the fan-out area 102 may be improved by making the thickness of the first protection layer 131 greater than or equal to 1.5 micrometers and less than or equal to 2 micrometers, and the sum of the thicknesses of the first protection layer 131 and the second protection layer 132 greater than or equal to 3 micrometers and less than or equal to 3.5 micrometers.
4. In some embodiments of the present application, by making the thickness of the second protection layer 132 greater than or equal to 1 micron and less than or equal to 1.5 microns, the thickness of the first protection layer 131 is 1.5 microns, and the sum of the thicknesses of the first protection layer 131 and the second protection layer 132 is greater than or equal to 2.5 microns and less than or equal to 3 microns, the protection performance of the touch layer 12 in the fan-out area 102 can be ensured while further eliminating the risk of generating the bubble line 20.
5. In some embodiments of the present application, by making the thickness of the first protection layer 131 greater than or equal to 0.5 micron and less than or equal to 1 micron, the sum of the thicknesses of the first protection layer 131 and the second protection layer 132 in the direction from the display substrate 11 to the touch layer 12 is greater than or equal to 2 microns and less than or equal to 2.5 microns, it is possible to avoid the excessive thickness of the first protection layer 131 from affecting the transmittance of the touch display panel 10.
6. In the manufacturing process of the touch display substrate 11, the first protection layer 131 and the second protection layer 132 are baked according to a preset process, so that the hardness and the adhesion of the first protection layer 131 and the second protection layer 132 can be improved, and the protection performance of the first protection layer 131 and the second protection layer 132 on the touch layer 12 can be improved.
Those of skill in the art will appreciate that the various operations, methods, steps in the flow, actions, schemes, and alternatives discussed in the present application may be alternated, altered, combined, or eliminated. Further, other steps, means, or steps in a process having various operations, methods, or procedures discussed in this application may be alternated, altered, rearranged, split, combined, or eliminated. Further, steps, measures, schemes in the prior art with various operations, methods, flows disclosed in the present application may also be alternated, altered, rearranged, decomposed, combined, or deleted.
In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
The terms "first," "second," and the like, 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 defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.
It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited in order and may be performed in other orders, unless explicitly stated herein. Moreover, at least some of the steps in the flowcharts of the figures may include a plurality of sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, the order of their execution not necessarily being sequential, but may be performed in turn or alternately with other steps or at least a portion of the other steps or stages.
The foregoing is only a partial embodiment of the present application, and it should be noted that, for a person skilled in the art, several improvements and modifications can be made without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.
Claims (9)
1. A touch display panel, comprising:
the display substrate comprises a display area and a fan-out area positioned at one side of the display area;
the touch control layer is arranged on one side of the display substrate and extends from the display area to the fan-out area;
the first protection layer is arranged on one side, far away from the display substrate, of the touch control layer, and covers the display area and part of the fan-out area so as to expose part of the touch control layer, far away from the display area, in the fan-out area;
the second protection layer is arranged on one side, far away from the display substrate, of the first protection layer, and orthographic projection of the second protection layer on the display substrate is positioned in the fan-out area covered by the first protection layer;
the thickness of the second protective layer in the direction from the display substrate to the touch control layer is less than or equal to 1.5 micrometers;
the polaroid is attached to one side, far away from the display substrate, of the first protective layer and one side, far away from the display substrate, of the second protective layer, and the polaroid covers the display area and part of the second protective layer;
the thickness of the first protective layer in the direction from the display substrate to the touch layer is greater than or equal to 1.5 micrometers and less than or equal to 2 micrometers.
2. The touch display panel according to claim 1, wherein a sum of thicknesses of the first protective layer and the second protective layer is greater than or equal to 3 micrometers and less than or equal to 3.5 micrometers in a direction from the display substrate to the touch layer; or, in the direction from the display substrate to the touch layer, the sum of the thicknesses of the first protective layer and the second protective layer is greater than or equal to 2.5 micrometers and less than or equal to 3 micrometers.
3. The touch display panel of claim 1, wherein a thickness of the first protective layer in a direction from the display substrate to the touch layer is greater than or equal to 0.5 microns and less than or equal to 1 micron.
4. The touch display panel according to claim 3, wherein a sum of thicknesses of the first protective layer and the second protective layer in a direction from the display substrate to the touch layer is greater than or equal to 2 micrometers and less than or equal to 2.5 micrometers.
5. The touch display panel of claim 1, wherein the fanout area comprises a first fanout area and a second fanout area, the second fanout area is located on a side of the first fanout area away from the display area, and the second fanout area is a binding area;
the first protection layer covers the first fan-out area, and the second protection layer covers the first fan-out area.
6. A display device comprising the touch display panel according to any one of claims 1 to 5.
7. The manufacturing method of the touch display panel is characterized by comprising the following steps of:
providing a display substrate, wherein the display substrate comprises a display area and a fan-out area positioned at one side of the display area;
manufacturing a touch control layer on one side of the display substrate through a composition process, wherein the touch control layer extends from the display area to the fan-out area;
manufacturing a first protection layer on one side of the touch control layer far away from the display substrate through a patterning process, so that the first protection layer covers the display area and part of the fan-out area;
manufacturing a second protective layer on one side, far away from the display substrate, of the first protective layer through a patterning process, wherein orthographic projection of the second protective layer on the display substrate is positioned in the fan-out area covered by the first protective layer; the thickness of the second protective layer in the direction from the display substrate to the touch control layer is less than or equal to 1.5 micrometers;
manufacturing a polaroid, wherein the polaroid is attached to one side, far away from the display substrate, of the first protective layer and one side, far away from the display substrate, of the second protective layer, and the polaroid covers the display area and part of the second protective layer;
the thickness of the first protective layer in the direction from the display substrate to the touch layer is greater than or equal to 1.5 micrometers and less than or equal to 2 micrometers.
8. The method of manufacturing according to claim 7, wherein after the first protective layer is manufactured on a side of the touch layer away from the display substrate by a patterning process, the manufacturing of the second protective layer on a side of the first protective layer away from the display substrate by a patterning process further comprises:
baking the first protective layer according to a preset first technological parameter;
after the second protective layer is manufactured on the side, far away from the display substrate, of the first protective layer through the patterning process, the method further comprises the following steps:
and baking the second protective layer according to preset second technological parameters.
9. The method of claim 8, wherein the first process parameters include: the baking temperature is 130-150 degrees, and the baking time is 20-30 minutes; and/or, the second process parameters include: the baking temperature is 130 DEG to 150 DEG, and the baking time is 20 minutes to 30 minutes.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107193415A (en) * | 2017-05-18 | 2017-09-22 | 京东方科技集团股份有限公司 | A kind of OLED touch display substrates and preparation method thereof, touch control display apparatus |
| CN110262701A (en) * | 2019-07-30 | 2019-09-20 | 昆山国显光电有限公司 | A kind of display panel and display device |
| CN112083756A (en) * | 2019-06-13 | 2020-12-15 | 瀚宇彩晶股份有限公司 | Flexible touch panel and flexible touch display panel |
| CN214751832U (en) * | 2021-06-21 | 2021-11-16 | 昆山工研院新型平板显示技术中心有限公司 | Touch panel and display device |
| CN215769704U (en) * | 2021-08-30 | 2022-02-08 | 昆山龙腾光电股份有限公司 | Touch display device |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107193415A (en) * | 2017-05-18 | 2017-09-22 | 京东方科技集团股份有限公司 | A kind of OLED touch display substrates and preparation method thereof, touch control display apparatus |
| CN112083756A (en) * | 2019-06-13 | 2020-12-15 | 瀚宇彩晶股份有限公司 | Flexible touch panel and flexible touch display panel |
| CN110262701A (en) * | 2019-07-30 | 2019-09-20 | 昆山国显光电有限公司 | A kind of display panel and display device |
| CN214751832U (en) * | 2021-06-21 | 2021-11-16 | 昆山工研院新型平板显示技术中心有限公司 | Touch panel and display device |
| CN215769704U (en) * | 2021-08-30 | 2022-02-08 | 昆山龙腾光电股份有限公司 | Touch display device |
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