CN113745432A - Display module assembly and vehicle-mounted display device - Google Patents
Display module assembly and vehicle-mounted display device Download PDFInfo
- Publication number
- CN113745432A CN113745432A CN202111038555.1A CN202111038555A CN113745432A CN 113745432 A CN113745432 A CN 113745432A CN 202111038555 A CN202111038555 A CN 202111038555A CN 113745432 A CN113745432 A CN 113745432A
- Authority
- CN
- China
- Prior art keywords
- display
- layer
- bonding layer
- substrate
- display substrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000758 substrate Substances 0.000 claims abstract description 139
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 230000002093 peripheral effect Effects 0.000 claims abstract description 20
- 239000010410 layer Substances 0.000 claims description 182
- 239000012790 adhesive layer Substances 0.000 claims description 57
- 230000005540 biological transmission Effects 0.000 claims description 8
- 229910052740 iodine Inorganic materials 0.000 claims description 7
- 239000011630 iodine Substances 0.000 claims description 7
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical group [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 6
- 238000004806 packaging method and process Methods 0.000 claims description 6
- 238000002834 transmittance Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 27
- 239000000853 adhesive Substances 0.000 description 13
- 230000001070 adhesive effect Effects 0.000 description 13
- 239000004372 Polyvinyl alcohol Substances 0.000 description 12
- 229920002451 polyvinyl alcohol Polymers 0.000 description 12
- 239000010408 film Substances 0.000 description 11
- 230000003287 optical effect Effects 0.000 description 11
- 239000004642 Polyimide Substances 0.000 description 9
- 229920001721 polyimide Polymers 0.000 description 9
- 238000005538 encapsulation Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000012044 organic layer Substances 0.000 description 6
- 238000003860 storage Methods 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000002346 layers by function Substances 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229920001665 Poly-4-vinylphenol Polymers 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- -1 iodine ions Chemical class 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 238000002310 reflectometry Methods 0.000 description 2
- 239000005361 soda-lime glass Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920012266 Poly(ether sulfone) PES Polymers 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000005525 hole transport Effects 0.000 description 1
- 150000007529 inorganic bases Chemical class 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-M iodide Chemical compound [I-] XMBWDFGMSWQBCA-UHFFFAOYSA-M 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000007530 organic bases Chemical class 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/868—Arrangements for polarized light emission
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/40—OLEDs integrated with touch screens
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The utility model provides a display module assembly and on-vehicle display device belongs to and shows technical field. The display module comprises a display substrate, a display area and a peripheral area, wherein the display substrate comprises the display area and the peripheral area; the polaroid is arranged on one side of the display substrate; the bonding layer is bonded on one side of the polaroid, which is far away from the display substrate, and comprises a first bonding layer and a second bonding layer surrounding the periphery of the first bonding layer, wherein the orthographic projection of the first bonding layer on the display substrate is at least partially overlapped with the display area, and the orthographic projection of the second bonding layer on the display substrate is at least partially overlapped with the peripheral area; the cover plate is arranged on one side, away from the display substrate, of the bonding layer, and is provided with a light shielding part which defines a window area, and the orthographic projection of the window area on the display substrate is at least partially overlapped with the orthographic projection of the first bonding layer on the display substrate; the water vapor containing capacity of the first bonding layer is higher than that of the second bonding layer, or the water vapor transmittance of the first bonding layer is higher than that of the second bonding layer.
Description
Technical Field
The disclosure relates to the technical field of display, in particular to a display module and a display device.
Background
The vehicle-mounted display has a crucial influence on safe driving of a driver, so that the OLED vehicle-mounted screen is required to have extremely high environmental reliability.
In an OLED (Organic Light-Emitting Diode) module structure, a Polarizer (POL) is a material most susceptible to failure due to environmental factors. In the prior art, a layer of uniform optical Adhesive (OCA) is completely attached to the upper surface of POL for bonding the POL to other materials. In the prior art, the water resistance of the optical adhesive is not different on the whole bonding surface, and the higher the water resistance is, the more beneficial the negative influence of environmental water vapor on the polaroid is reduced, but the high temperature resistance of the polaroid is reduced.
The above information disclosed in the background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute prior art that is known to a person of ordinary skill in the art.
Disclosure of Invention
The utility model aims to provide a display module assembly and on-vehicle display device can improve the high temperature resistant high humidity resistance ability of the interior polaroid of display module assembly.
In order to achieve the purpose, the technical scheme adopted by the disclosure is as follows:
according to a first aspect of the present disclosure, there is provided a display module, comprising:
the display substrate comprises a display area and a peripheral area positioned at the periphery of the display area;
the polaroid is arranged on one side of the display substrate;
the bonding layer is bonded on one side of the polaroid, which is far away from the display substrate, and comprises a first bonding layer and a second bonding layer surrounding the periphery of the first bonding layer, wherein the orthographic projection of the first bonding layer on the display substrate is at least partially overlapped with the display area, and the orthographic projection of the second bonding layer on the display substrate is at least partially overlapped with the peripheral area;
the cover plate is arranged on one side, away from the display substrate, of the bonding layer, and is provided with a shading part, the shading part defines a window area, the orthographic projection of the window area on the display substrate is at least partially overlapped with the display area, the orthographic projection of the window area on the display substrate is at least partially overlapped with the orthographic projection of the first bonding layer on the display substrate, and the orthographic projection of the shading part on the display substrate is at least partially overlapped with the orthographic projection of the second bonding layer on the display substrate;
wherein the first bonding layer has a higher water vapor holding capacity than the second bonding layer, or
The water vapor transmission rate of the first bonding layer is higher than that of the second bonding layer.
In an exemplary embodiment of the present disclosure, the first adhesive layer is provided with a vent.
In one exemplary embodiment of the present disclosure, the polarizer is an iodine-based polarizer.
In an exemplary embodiment of the present disclosure, an orthographic projection of the second adhesive layer on the display substrate is located at a periphery of the display area, and an orthographic projection of the second adhesive layer on the display substrate is located at a periphery of an orthographic projection of the window area on the display substrate.
In an exemplary embodiment of the present disclosure, the display substrate includes:
a substrate base plate;
the driving layer is arranged on one side of the substrate base plate and comprises a pixel circuit;
the light-emitting layer is arranged on one side, away from the substrate, of the driving layer and comprises a light-emitting device, and the pixel circuit is used for driving the light-emitting device to emit light;
and the packaging layer is arranged on one side of the light-emitting layer, which deviates from the substrate base plate, and covers the light-emitting layer.
In an exemplary embodiment of the present disclosure, the display module further includes:
and the supporting layer is arranged on one side of the display substrate, which deviates from the polaroid.
In an exemplary embodiment of the present disclosure, the display module further includes:
and the touch panel is arranged between the bonding layer and the cover plate and comprises a substrate and a touch electrode arranged on one side of the substrate.
In an exemplary embodiment of the present disclosure, the display substrate further includes:
and the touch electrode is arranged between the packaging layer and the polaroid.
In an exemplary embodiment of the present disclosure, the display module further includes:
and the touch electrode is arranged between the cover plate and the bonding layer.
According to a second aspect of the present disclosure, an on-vehicle display device is provided, which includes the display module of the first aspect.
The utility model provides a display module assembly, tie coat bond in the polaroid deviate from one side of display substrates, this tie coat include first tie coat and around the second tie coat of first tie coat outlying, wherein, the steam holding capacity of first tie coat is higher than the steam holding capacity of second tie coat, or the steam transmissivity of first tie coat is higher than the steam transmissivity of second tie coat. The second bonding layer can prevent external water vapor from entering the display module, so that the high temperature and high humidity resistance of the polarizer in the display module is improved; when the temperature of the display module rises, part of water remained in the polarizer is evaporated into water vapor, and the water vapor can be absorbed by the first bonding layer or diffused from the first bonding layer, so that the high-temperature and high-humidity resistance of the polarizer in the display module is further improved.
Drawings
The above and other features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
FIG. 1 is a schematic diagram illustrating a planar structure of a display module according to an exemplary embodiment of the disclosure;
FIG. 2 is a schematic view of a display substrate structure in an exemplary embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a display module according to an exemplary embodiment of the disclosure;
FIG. 4 is a schematic diagram of a display module according to another exemplary embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a display module according to still another exemplary embodiment of the disclosure.
The reference numerals of the main elements in the figures are explained as follows:
01-a display area; 02-peripheral region; 1-a substrate base plate; 2-a drive layer; 3-a light emitting layer; 4-an encapsulation layer; 5-a polarizer; 6-a bonding layer; 61-a first adhesive layer; 62-a second adhesive layer; 7-a touch panel; 8-an optical adhesive layer; 9-cover plate; 91-a light shielding portion; 92-window area; 10-a support layer; 70-a substrate; 71 a-touch electrodes; 71 b-touch electrodes; 71 c-touch electrodes.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure.
In the drawings, the thickness of regions and layers may be exaggerated for clarity. The same reference numerals denote the same or similar structures in the drawings, and thus detailed descriptions thereof will be omitted.
The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the embodiments of the disclosure can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring the primary technical ideas of the disclosure.
When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via another structure.
The terms "a," "an," "the," and the like are used to denote the presence of one or more elements/components/parts; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc. The terms "first" and "second", etc. are used merely as labels, and are not limiting on the number of their objects.
The environment-reliable high-temperature high-humidity (THS) and high-temperature storage (HTS) conditions of display products used by general consumers, such as mobile phones, computers, televisions and the like, generally require only 60 ℃/90% Rh for 500hrs and 85 ℃ -500 hrs. However, the vehicle-mounted display has a crucial influence on safe driving of a driver, and therefore the OLED vehicle-mounted screen is required to have extremely high environmental reliability. Generally, the reliability of the vehicle-mounted environment requires high temperature and high humidity, the high temperature storage condition meets 65 ℃/93% Rh-1000hrs and 90-1000 hrs, and the OLED may be required to meet the storage test requirements of 85 ℃/85% Rh-500hrs and 95-1000 hrs in the future.
In the related art, the polarizer can significantly reduce the reflectivity of the metal electrode of the OLED display product, which is the most effective way to reduce the reflectivity at present. The iodine polarizer is a polarizer commonly used in the current display products, is obtained by dyeing with iodine dye, and has polarization performance based on optical dichroism containing crystals. The material of the polarizer may include PVA (polyvinyl alcohol). The PVA film is immersed in the iodine ion solution, so that iodine ions are diffused into the PVA film, the PVA film is stretched after slight heating, the PVA film is lengthened, the PVA film is narrow and thin, PVA molecules are randomly distributed at any angle, the PVA films are gradually and uniformly deflected in the acting force direction after being stressed and stretched, and the iodine molecules attached to the PVA and having dichroism are also followed with directionality, so that the polarizer with the polarizing performance is manufactured. The polarizer is dried in the preparation process to remove moisture in the polarizer. However, a small amount of moisture remains in the finished polarizer, especially in the middle region of the polarizer. This portion of the residual moisture will evaporate into water vapor under certain high temperature conditions. If the partial water vapor is not released from the polarizer region in time, the polarizer may be in a high temperature and high humidity environment, which may result in failure of the polarizer.
As shown in fig. 2 to 5, the display module according to the embodiment of the present disclosure includes a display substrate, a polarizer 5, an adhesive layer 6, and a cover plate 9. The display substrate comprises a display area 01 and a peripheral area 02 positioned at the periphery of the display area 01; a polarizer 5 disposed on one side of the display substrate; the bonding layer 6 is bonded on one side, away from the display substrate, of the polarizer 5, the bonding layer 6 comprises a first bonding layer 61 and a second bonding layer 62 surrounding the periphery of the first bonding layer 61, the orthographic projection of the first bonding layer 61 on the display substrate is at least partially overlapped with the display area 01, and the orthographic projection of the second bonding layer 62 on the display substrate is at least partially overlapped with the peripheral area 02; the cover plate 9 is arranged on one side, away from the display substrate, of the bonding layer 6, the cover plate 9 is provided with a light shielding part 91, the light shielding part 91 defines a window area 92, the orthographic projection of the window area 92 on the display substrate is at least partially overlapped with the display area 01, the orthographic projection of the window area 92 on the display substrate is at least partially overlapped with the orthographic projection of the first bonding layer 61 on the display substrate, and the orthographic projection of the light shielding part 91 on the display substrate is at least partially overlapped with the orthographic projection of the second bonding layer 62 on the display substrate; the water vapor holding capacity of the first adhesive layer 61 is higher than that of the second adhesive layer 62, or the water vapor permeability of the first adhesive layer 61 is higher than that of the second adhesive layer 62.
The display module assembly that this disclosure provided, tie coat 6 bond in polarizer 5 deviate from one side of display substrate, and this tie coat 6 includes first tie coat 61 and surrounds first tie coat 61 peripheral second tie coat 62, and wherein, the steam holding capacity of first tie coat 61 is higher than the steam holding capacity of second tie coat 62, or the steam transmissivity of first tie coat 61 is higher than the steam transmissivity of second tie coat 62. The second bonding layer 62 can prevent external water vapor from entering the display module, so that the high temperature and high humidity resistance of the polarizer 5 in the display module is improved; when the temperature of the display module rises, part of the water remaining in the polarizer 5 is evaporated into water vapor, and the water vapor can be absorbed by the first bonding layer 61 or diffused from the first bonding layer 61, so that the high temperature and high humidity resistance of the polarizer 5 in the display module is further improved.
Each component of the display module provided by the embodiments of the present disclosure is described in detail below with reference to the accompanying drawings:
the present disclosure provides a display module, which may be an OLED (Organic Light-Emitting Diode) display module. The display module comprises a display substrate, a polarizer 5, an adhesive layer 6 and a cover plate 9.
As shown in fig. 2 to 5, the display substrate includes a display region 01 and a peripheral region 02 located at the periphery of the display region 01. The display area 01 is used for displaying an image.
The polarizer 5 is disposed on one side of the display substrate. In some embodiments, polarizer 5 is an iodine-based polarizer 5. The polarizer 5 may be connected to the display substrate through an optical adhesive or the like.
And the bonding layer 6 is bonded on one side of the polarizer 5, which is far away from the display substrate, the bonding layer 6 comprises a first bonding layer 61 and a second bonding layer 62, which surrounds the periphery of the first bonding layer 61, the orthographic projection of the first bonding layer 61 on the display substrate is at least partially overlapped with the display area 01, and the orthographic projection of the second bonding layer 62 on the display substrate is at least partially overlapped with the peripheral area 02.
As shown in fig. 1, 3 to 5, in some embodiments, the first adhesive layer 61 is disposed opposite to the display area 01 of the display substrate, and an orthographic projection of the first adhesive layer 61 on the display substrate completely covers the display area 01. Specifically, the edge of the orthographic projection of the first adhesive layer 61 on the display substrate exceeds the edge of the display area 01, or just coincides with the edge of the display area 01. The second adhesive layer 62 is disposed opposite to the peripheral area 02 of the display substrate, an orthographic projection of the second adhesive layer 62 on the display substrate does not completely cover the peripheral area 02 or just covers the peripheral area 02, and an orthographic projection of the second adhesive layer 62 on the display substrate is located at the periphery of the display area 01.
In some embodiments of the present disclosure, the material of the adhesive layer 6 may be selected from one or a combination of acrylic, silicone, unsaturated polyester, epoxy, polyurethane, polyolefin, and the like adhesives, and may also be selected from inorganic silica gel adhesives.
In some embodiments of the present disclosure, the moisture holding capacity of the first adhesive layer 61 is higher than the moisture holding capacity of the second adhesive layer 62, the moisture holding capacity refers to the absorption capacity or the storage capacity of moisture, and the stronger the moisture absorption capacity or the storage capacity of moisture, the better the moisture holding capacity. That is, the moisture holding capacity of the first adhesive layer 61 is higher than the moisture holding capacity of the second adhesive layer 62 in the present disclosure, which means that the moisture absorbing capacity of the first adhesive layer 61 is higher than the moisture absorbing capacity of the second adhesive layer 62, or the moisture storing capacity of the first adhesive layer 61 is higher than the moisture storing capacity of the second adhesive layer 62.
In other embodiments of the present disclosure, the first adhesive layer 61 has a higher moisture vapor transmission rate than the second adhesive layer 62. In this disclosure, the water vapor transmission rate includes both the water vapor transmission capacity and the water vapor transmission coefficient, which are used to indicate the ability of water vapor to transmit through a material. The water vapor transmission rate represents the weight of the material through which water vapor is transmitted under certain conditions of time, temperature and humidity. The water vapor permeability coefficient is the amount of water vapor that permeates a sample per unit thickness and unit area under a unit water vapor pressure difference per unit time in an environment of a predetermined temperature and relative humidity.
In some embodiments of the present disclosure, the materials of the first bonding layer 61 and the second bonding layer 62 may be adjusted such that the materials of the first bonding layer 61 and the second bonding layer 62 are different, thereby achieving the purpose that the moisture holding capacity of the first bonding layer 61 is higher than that of the second bonding layer 62, or the moisture transmittance of the first bonding layer 61 is higher than that of the second bonding layer 62.
For example, in one embodiment, the material of the first adhesive layer 61 comprises inorganic silica gel with good water absorption, and the inorganic silica gel is very similar to a sponge body, and the interconnected pores form a capillary pore adsorption system with a large surface area, which can adsorb and retain water vapor. Under the condition of 100% humidity, it can adsorb and condense water vapour whose weight is equal to 40%. The material of the second adhesive layer 62 contains an adhesive such as epoxy having a good water-blocking property. In another embodiment, the first adhesive layer 61 is made of an optical adhesive, and the second adhesive layer 62 is made of a water-blocking adhesive, wherein the water vapor permeability of the water-blocking adhesive is lower than that of the optical adhesive. In addition, the specific choice of the first adhesive layer 61 and the second adhesive layer 62 can also be determined by purchasing different adhesives on the market, and testing their water vapor transmission rate or water vapor absorption capacity or water vapor storage capacity.
In other embodiments of the present disclosure, the structures of the first bonding layer 61 and the second bonding layer 62 may be adjusted so that the first bonding layer 61 and the second bonding layer 62 have a certain difference in structure, so as to achieve the purpose that the moisture holding capacity of the first bonding layer 61 is higher than that of the second bonding layer 62, or the purpose that the moisture permeability of the first bonding layer 61 is higher than that of the second bonding layer 62. For example, the first adhesive layer 61 has air holes, and the second adhesive layer 62 has no air holes. The arrangement mode and the number of the air holes are not limited in the disclosure. For example, the vent holes are micropores.
In some embodiments of the present disclosure, the thicknesses of the first adhesive layer 61 and the second adhesive layer 62 may be the same or different, depending on the actual film layer structure to be bonded. In an actual process, the first bonding layer 61 and the second bonding layer 62 may be formed by two processes, respectively, or may be formed by one process to form a complete bonding material layer, and then the first bonding layer 61 may be formed by forming a structure such as micro-pores in a middle region of the bonding material layer by a method such as perforation, while the second bonding layer 62 may be formed without forming micro-pores in a peripheral region of the bonding material layer.
The cover plate 9 is arranged on one side of the bonding layer 6, which is far away from the display substrate, the cover plate 9 is provided with a light shielding part 91, and the light shielding part 91 defines a window area 92. The orthographic projection of the window area 92 on the display substrate at least partially overlaps the display area 01. Specifically, the edge of the orthographic projection of the window region 92 on the display substrate may be located at the periphery of the edge of the display region 01 or just coincident with the display region 01. It should be noted that in the present disclosure, the orthographic projection of the window area 92 on the display substrate is exactly coincident with the display area 01, and the exact coincidence should take into account the existence of the working error. For example, when the distance between the orthographic projection of the outer edge of the window region 92 on the display substrate and the edge of the display region 01 accounts for less than 1% of the width of the display region 01, it can be considered that the orthographic projection of the window region 92 on the display substrate and the display region 01 are exactly overlapped. In practical applications, when the display area 01 displays a picture, a user can see the picture displayed in the display area 01 through the window area 92. The size and shape of the window area 92 can be specifically set according to the size and shape of the display area 01.
The light shielding portion 91 may include a resin of black, and the light shielding portion 91 may be an ink layer. The light shielding portion 91 may be formed by an exposure development technique, for example, by forming a light shielding material layer, such as a black photosensitive material layer, on one side of the transparent cover plate, followed by exposure development to form the desired light shielding portion 91. The material of the transparent cover plate may include transparent polyimide (CPI). The CPI material has excellent creep resistance while having sufficient physical and mechanical strength and optical properties to enable the production of transparent cover sheets that can be formed into foldable display products. In the present disclosure, the transparent cover plate may be a single-layer structure or a multi-layer structure. In some embodiments, the transparent cover plate is a single transparent polyimide layer, and in other embodiments, the transparent cover plate includes a first polyimide layer, an optical glue layer, a second polyimide layer, and the like, which are not limited in this disclosure.
In some embodiments of the present disclosure, an orthographic projection of the window region 92 on the display substrate at least partially overlaps an orthographic projection of the first adhesive layer 61 on the display substrate, and in particular, the orthographic projection of the window region 92 on the display substrate may be located inside, or just coincide with, the orthographic projection of the first adhesive layer 61 on the display substrate. An orthogonal projection of the light shielding portion 91 on the display substrate at least partially overlaps an orthogonal projection of the second adhesive layer 62 on the display substrate. Specifically, the inner edge of the orthographic projection of the light shielding portion 91 on the display substrate may be beyond the inner edge of the second adhesive layer 62 on the display substrate, or the inner edge of the orthographic projection of the light shielding portion 91 on the display substrate may just coincide with the inner edge of the second adhesive layer 62 on the display substrate. Further, the orthographic projection of the second adhesive layer 62 on the display substrate is located at the periphery of the orthographic projection of the window area 92 on the display substrate, that is, the orthographic projection of the window area 92 on the display substrate is located inside the orthographic projection of the first adhesive layer 61 on the display substrate, so that the window area 92 is orthographically corresponding to the uniform first adhesive layer 61, and the problem of chromatic aberration of the window area 92 caused by different refractive indexes of the first adhesive layer 61 and the second adhesive layer 62 is avoided.
In some embodiments of the present disclosure, the display substrate includes a substrate 1, a driving layer 2, a light emitting layer 3, and an encapsulation layer 4.
The base substrate 1 may be an inorganic base substrate 1 or an organic base substrate 1. For example, in one embodiment of the present disclosure, the material of the substrate base plate 1 may be a glass material such as soda-lime glass (soda-lime glass), quartz glass, or sapphire glass, or may be a metal material such as stainless steel, aluminum, or nickel. In another embodiment of the present disclosure, the material of the substrate 1 may be Polymethyl methacrylate (PMMA), Polyvinyl alcohol (PVA), Polyvinyl phenol (PVP), Polyether sulfone (PES), polyimide, polyamide, polyacetal, Polycarbonate (PC), Polyethylene terephthalate (PET), Polyethylene naphthalate (PEN), or a combination thereof. The substrate 1 may also be a flexible substrate, for example, in one embodiment of the present disclosure, the material of the substrate 1 may be Polyimide (PI). The substrate 1 may also be a composite of multiple layers of materials, for example, in an embodiment of the present disclosure, the substrate 1 may include a Bottom Film layer (Bottom Film), a pressure sensitive adhesive layer, a first polyimide layer, and a second polyimide layer, which are sequentially stacked.
The driving layer 2 is disposed on one side of the substrate 1, the driving layer 2 includes a driving circuit, the driving circuit may include a pixel circuit and a peripheral circuit, the pixel circuit is disposed in the display area 01, the pixel circuit includes a transistor and a capacitor, which may be a pixel circuit of 7T1C, 7T2C, 6T1C or 6T2C, and the like, wherein nTmC means that one pixel circuit includes n transistors (denoted by a letter "T") and m capacitors (denoted by a letter "C"). The peripheral circuit is located in the peripheral area 02, and the peripheral circuit is connected to the pixel circuit and is used for inputting a driving signal to the pixel circuit.
In some embodiments of the present disclosure, the driving layer 2 may be formed by a multilayer film structure, and taking a transistor in the pixel circuit as a top gate type transistor as an example, the driving layer 2 includes an active layer, a first gate insulating layer, a gate electrode, a second gate insulating layer, and a first source drain layer. The active layer is arranged on one side of the substrate base plate 1; the first gate insulating layer is arranged on one side, away from the substrate base plate 1, of the active layer, and covers the active layer; the grid electrode is arranged on one side of the first grid insulating layer, which is deviated from the substrate base plate 1; the second gate insulating layer is arranged on one side of the gate electrode, which is far away from the substrate base plate 1, and covers the gate electrode and the first gate insulating layer; the first source drain layer is arranged on one side, away from the substrate base plate 1, of the second gate insulating layer and comprises a source electrode and a drain electrode. It should be noted that in other embodiments of the present disclosure, the transistors in the pixel circuit may also be top-gate transistors, and the structures of the transistors are common in the art and will not be described in detail here.
The light-emitting layer 3 is arranged on one side of the driving layer 2, which is far away from the substrate base plate 1, the light-emitting layer 3 comprises a light-emitting device, and the pixel circuit is used for driving the light-emitting device to emit light. The number of the pixel circuits is the same as that of the light emitting devices, and the pixel circuits are connected to the light emitting devices in a one-to-one correspondence so as to control the light emitting devices to emit light, respectively.
In some embodiments of the present disclosure, the light emitting layer 3 includes a first electrode layer, a pixel defining layer, a light emitting function layer, and a second electrode layer. The first electrode layer, the light emitting functional layer and the second electrode layer may be combined to form a light emitting device. The first electrode layer is arranged on one side of the driving layer 2, which is far away from the substrate base plate 1, and the first electrode layer comprises a plurality of first electrodes which are arranged at intervals. The first electrode may be an anode. The pixel defining layer is arranged on one side of the first electrode layer, which is far away from the substrate base plate 1, and is provided with openings for exposing the first electrodes, and the openings correspond to the first electrodes one to one; the orthographic projection of the opening on the substrate base plate 1 can be circular, oval or polygonal, and the like, and the disclosure is not limited in particular. The light-emitting functional layer is at least partially arranged in the opening and arranged on the surface of the first electrode layer departing from the substrate base plate 1. The light emitting function layer may include a hole injection layer, a hole transport layer, a light emitting material layer, an electron transport layer, and an electron injection layer, which are sequentially stacked in a direction away from the substrate 1, and may generate visible light by forming excitons through recombination of holes and electrons in the light emitting material layer and radiating photons from the excitons, and a specific light emitting principle will not be described in detail herein. The second electrode layer is arranged on one side of the light-emitting functional layer, which is far away from the substrate base plate 1. The second electrode layer may be a cathode.
The packaging layer 4 is arranged on one side of the light-emitting layer 3, which deviates from the substrate base plate 1, and the packaging layer 4 covers the light-emitting layer 3, which can be used for protecting the light-emitting layer 3 and preventing the corrosion of external water and oxygen to the light-emitting device.
In some embodiments of the present disclosure, the Encapsulation may be implemented by using a Thin-Film Encapsulation (TFE), and specifically, the Encapsulation layer 4 may include a first inorganic layer, an organic layer, and a second inorganic layer, wherein the first inorganic layer covers a surface of the light-emitting layer 3 facing away from the driving backplane, the organic layer may be disposed on a surface of the first inorganic layer facing away from the driving backplane, and an edge of the organic layer is defined inside a boundary of the first inorganic layer, and the second inorganic layer covers the organic layer and the first inorganic layer not covered by the organic layer, so that water and oxygen can be blocked by the second inorganic layer, and planarization is implemented by the organic layer having flexibility.
In some embodiments of the present disclosure, the display module further includes a support layer 10 disposed on a side of the display substrate facing away from the polarizer 5. The supporting layer 10 mainly plays roles of supporting protection, heat dissipation, electromagnetic shielding and the like, and can be made of foam, copper foil, graphite layer, aluminum plate, SUS and the like.
As shown in fig. 4, in some embodiments of the present disclosure, the display module further includes a touch panel 7 disposed between the adhesive layer 6 and the cover plate 9, and the touch panel 7 includes a substrate 70 (such as PET, COP, etc.) and a touch electrode 71a disposed on one side of the substrate 70. The touch panel 7 is an external touch panel 7, and the display module combines the display substrate and the touch panel 7 to realize touch display. One side surface of the touch panel 7 is connected with the polarizer 5 through the bonding layer 6, and the other side surface is connected with the cover plate 9 through the optical adhesive layer 8. It should be noted that the optical adhesive layer 8 between the touch panel 7 and the cover plate 9 may be an adhesive with a uniform structure, or an adhesive with a different structure or a different material may be selected by regions according to the arrangement manner of the adhesive layer 6, and the disclosure is not limited thereto.
As shown in fig. 3, in other embodiments of the present disclosure, the display substrate further includes a touch electrode 71b disposed between the encapsulation layer 4 and the polarizer 5. The touch electrode 71b is an FMLOC (film multi-layer on cell touch). The touch electrode 71b may include a first touch electrode and a second touch electrode, and the first touch electrode and the second touch electrode may be distributed in a cross manner in a space along a first direction and a second direction perpendicular to each other, so that a touch position may be determined by sensing a capacitance change between the first touch electrode and the second touch electrode. Of course, the touch electrode may have other structures known to those skilled in the art, and the disclosure is not limited thereto.
As shown in fig. 5, in some embodiments of the present disclosure, the display module further includes a touch electrode 71c disposed between the cover plate 9 and the adhesive layer 6. The touch electrode 71c is integrated on the cover plate 9, and the structure of the touch electrode 71c can refer to the content of the above embodiments, which is not described in detail herein.
In other embodiments of the present disclosure, the Display substrate may also be a Thin Film Transistor Liquid Crystal Display (TFT-LCD) Display substrate, which may include a substrate, a driving layer, a pixel electrode, a Liquid Crystal layer, a common electrode, an encapsulation layer, and the like.
The disclosed embodiment further provides a vehicle-mounted display device, which comprises a display module, wherein the display module can be the display module of any of the above embodiments, and the specific structure and the beneficial effects of the display module can refer to the embodiment of the display module in the above description, which is not repeated herein. The vehicle-mounted display device of the present disclosure may be a vehicle-mounted display screen, a vehicle-mounted display, and the like.
It is to be understood that the disclosure is not limited in its application to the details of construction and the arrangements of the components set forth in the specification. The present disclosure is capable of other embodiments and of being practiced and carried out in various ways. The foregoing variations and modifications are within the scope of the present disclosure. It should be understood that the disclosure disclosed and defined in this specification extends to all alternative combinations of two or more of the individual features mentioned or evident from the text and/or drawings. All of these different combinations constitute various alternative aspects of the present disclosure. The embodiments of this specification illustrate the best mode known for carrying out the disclosure and will enable those skilled in the art to utilize the disclosure.
Claims (10)
1. A display module, comprising:
the display substrate comprises a display area and a peripheral area positioned at the periphery of the display area;
the polaroid is arranged on one side of the display substrate;
the bonding layer is bonded on one side of the polaroid, which is far away from the display substrate, and comprises a first bonding layer and a second bonding layer surrounding the periphery of the first bonding layer, wherein the orthographic projection of the first bonding layer on the display substrate is at least partially overlapped with the display area, and the orthographic projection of the second bonding layer on the display substrate is at least partially overlapped with the peripheral area;
the cover plate is arranged on one side, away from the display substrate, of the bonding layer, and is provided with a shading part, the shading part defines a window area, the orthographic projection of the window area on the display substrate is at least partially overlapped with the display area, the orthographic projection of the window area on the display substrate is at least partially overlapped with the orthographic projection of the first bonding layer on the display substrate, and the orthographic projection of the shading part on the display substrate is at least partially overlapped with the orthographic projection of the second bonding layer on the display substrate;
wherein the first bonding layer has a higher water vapor holding capacity than the second bonding layer, or
The water vapor transmission rate of the first bonding layer is higher than that of the second bonding layer.
2. The display module according to claim 1, wherein the first adhesive layer is provided with air holes.
3. The display module of claim 1 wherein the polarizer is an iodine-based polarizer.
4. The display module of claim 1, wherein an orthographic projection of the second adhesive layer on the display substrate is located at a periphery of the display area, and an orthographic projection of the second adhesive layer on the display substrate is located at a periphery of an orthographic projection of the window area on the display substrate.
5. The display module of claim 1, wherein the display substrate comprises:
a substrate base plate;
the driving layer is arranged on one side of the substrate base plate and comprises a pixel circuit;
the light-emitting layer is arranged on one side, away from the substrate, of the driving layer and comprises a light-emitting device, and the pixel circuit is used for driving the light-emitting device to emit light;
and the packaging layer is arranged on one side of the light-emitting layer, which deviates from the substrate base plate, and covers the light-emitting layer.
6. The display module assembly of claim 1, wherein the display module assembly further comprises:
and the supporting layer is arranged on one side of the display substrate, which deviates from the polaroid.
7. The display module assembly of claim 5, wherein the display module assembly further comprises:
and the touch panel is arranged between the bonding layer and the cover plate and comprises a substrate and a touch electrode arranged on one side of the substrate.
8. The display module of claim 5, wherein the display substrate further comprises:
and the touch electrode is arranged between the packaging layer and the polaroid.
9. The display module assembly of claim 5, wherein the display module assembly further comprises:
and the touch electrode is arranged between the cover plate and the bonding layer.
10. An on-board display device comprising the display module of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111038555.1A CN113745432B (en) | 2021-09-06 | 2021-09-06 | Display module and vehicle-mounted display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111038555.1A CN113745432B (en) | 2021-09-06 | 2021-09-06 | Display module and vehicle-mounted display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113745432A true CN113745432A (en) | 2021-12-03 |
| CN113745432B CN113745432B (en) | 2024-03-15 |
Family
ID=78736060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111038555.1A Active CN113745432B (en) | 2021-09-06 | 2021-09-06 | Display module and vehicle-mounted display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113745432B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007027142A (en) * | 1998-09-30 | 2007-02-01 | Sanyo Electric Co Ltd | Manufacturing method of display device |
| JP2007265764A (en) * | 2006-03-28 | 2007-10-11 | Canon Inc | Organic el element |
| JP2014157227A (en) * | 2013-02-15 | 2014-08-28 | Toyobo Co Ltd | Image display device |
| CN106848105A (en) * | 2017-04-17 | 2017-06-13 | 京东方科技集团股份有限公司 | A kind of display panel and preparation method thereof |
| CN107589865A (en) * | 2017-08-09 | 2018-01-16 | 苏州欧菲光科技有限公司 | Touch-screen and terminal |
| CN110045863A (en) * | 2019-03-01 | 2019-07-23 | 上海天马微电子有限公司 | Touch panel and display device |
| CN110993814A (en) * | 2019-11-15 | 2020-04-10 | 深圳市华星光电半导体显示技术有限公司 | Display device and method for manufacturing the same |
| CN110993813A (en) * | 2019-11-14 | 2020-04-10 | 深圳市华星光电半导体显示技术有限公司 | OLED display panel and preparation method thereof |
| CN111048686A (en) * | 2019-11-19 | 2020-04-21 | Tcl华星光电技术有限公司 | Display device and packaging method adopting same |
| CN111599934A (en) * | 2020-05-07 | 2020-08-28 | Tcl华星光电技术有限公司 | Display panel and preparation method thereof |
-
2021
- 2021-09-06 CN CN202111038555.1A patent/CN113745432B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007027142A (en) * | 1998-09-30 | 2007-02-01 | Sanyo Electric Co Ltd | Manufacturing method of display device |
| JP2007265764A (en) * | 2006-03-28 | 2007-10-11 | Canon Inc | Organic el element |
| JP2014157227A (en) * | 2013-02-15 | 2014-08-28 | Toyobo Co Ltd | Image display device |
| CN106848105A (en) * | 2017-04-17 | 2017-06-13 | 京东方科技集团股份有限公司 | A kind of display panel and preparation method thereof |
| CN107589865A (en) * | 2017-08-09 | 2018-01-16 | 苏州欧菲光科技有限公司 | Touch-screen and terminal |
| CN110045863A (en) * | 2019-03-01 | 2019-07-23 | 上海天马微电子有限公司 | Touch panel and display device |
| CN110993813A (en) * | 2019-11-14 | 2020-04-10 | 深圳市华星光电半导体显示技术有限公司 | OLED display panel and preparation method thereof |
| CN110993814A (en) * | 2019-11-15 | 2020-04-10 | 深圳市华星光电半导体显示技术有限公司 | Display device and method for manufacturing the same |
| CN111048686A (en) * | 2019-11-19 | 2020-04-21 | Tcl华星光电技术有限公司 | Display device and packaging method adopting same |
| CN111599934A (en) * | 2020-05-07 | 2020-08-28 | Tcl华星光电技术有限公司 | Display panel and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113745432B (en) | 2024-03-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106952941B (en) | Display panel, manufacturing method and electronic equipment | |
| KR102646618B1 (en) | Display device and manufacturing method of the same | |
| WO2019085859A1 (en) | Collimator, optical fingerprint recognizer, and fullscreen | |
| US11151352B2 (en) | Display device | |
| US9508943B2 (en) | Organic light emitting diode display device | |
| US8952599B2 (en) | Polarization structure, method of manufacturing the same and organic light emitting display having the structure | |
| US9395471B2 (en) | Display device | |
| KR102314403B1 (en) | Display device and method for manufacturing thereof | |
| US10527878B2 (en) | Display panel and method for manufacturing the same | |
| CN111816678A (en) | Display device | |
| TW201448314A (en) | Display apparatus having improved bending properties and method of manufacturing same | |
| US20210295747A1 (en) | Flexible display device | |
| TWI795656B (en) | Touch display device for preventing light leakage | |
| CN108537171A (en) | A kind of display device and preparation method thereof | |
| CN111833750A (en) | Folding screen assembly and electronic equipment | |
| US11481002B2 (en) | Electronic device | |
| KR20110097078A (en) | Liquid crystal display device | |
| US20220100229A1 (en) | Display device | |
| CN113745432B (en) | Display module and vehicle-mounted display device | |
| US11280946B2 (en) | Polarizing sheet, display screen, terminal, and method for manufacturing polarizing sheet | |
| CN112764152A (en) | Display assembly and display device | |
| CN111640373B (en) | Cover plate and display device | |
| CN113964168A (en) | Cover plate structure, preparation method thereof and OLED display module | |
| CN112864208A (en) | Display panel and display device | |
| CN114824133B (en) | Display panel, display panel manufacturing method and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |