CN112419878A

CN112419878A - Cover plate assembly, manufacturing method thereof and vehicle-mounted display device

Info

Publication number: CN112419878A
Application number: CN202011304618.9A
Authority: CN
Inventors: 李岐君
Original assignee: Tianma Microelectronics Co Ltd
Current assignee: Tianma Microelectronics Co Ltd
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2021-02-26

Abstract

The application discloses a cover plate assembly, a manufacturing method of the cover plate assembly and a vehicle-mounted display device, and belongs to the field of vehicle-mounted touch display devices. Wherein, the apron subassembly includes: the cover plate is provided with a light-emitting surface and a back surface opposite to the light-emitting surface; the touch pad is arranged on the back surface of the cover plate in a stacked mode; the support covers the cover plate and the touch control plate and is integrally arranged, the support comprises a main body part and an extension part, the main body part surrounds the cover plate and the touch control plate, and the extension part is formed by extending the main body part to the space between the cover plate and the touch control plate. The application provides a apron subassembly can improve because of the bad problem of laminating that the apron warpage of moulding plastics leads to, improves touch operation simultaneously and feels.

Description

Cover plate assembly, manufacturing method thereof and vehicle-mounted display device

Technical Field

The application relates to the technical field of touch display panels, in particular to a cover plate assembly, a manufacturing method of the cover plate assembly and a vehicle-mounted display device.

Background

With the rapid development of science and technology and the gradual popularization of computer technology, touch technology is widely applied to various industries, and touch screens are more popular in the electronic product market and have already occupied the market leading position. In the field of vehicle-mounted touch screens, touch display panels using In-mold thermal transfer (IMD) and In-mold Insert (IML) technologies have a strong market demand due to abrasion resistance, bright pattern colors and difficulty In fading.

In the touch screen adopting the IMD technology in the market, an injection molding part serving as a cover plate is bonded, attached and fixed with a touch control plate through Optical Clear Resin (OCR) or Optical Clear Adhesive (OCA), and the deformation or warpage of the injection molding cover plate is often caused by the influence of factors such as uneven injection molding cooling, uneven molding stress, shrinkage of injection molding materials and the like of the injection molding part.

Disclosure of Invention

In view of this, embodiments of the present application provide a cover plate assembly, a vehicle-mounted display device, and a method for manufacturing the cover plate assembly, which can improve the problems of deformation or warpage of an injection-molded cover plate.

On the one hand, the embodiment of the application provides a cover plate assembly, which comprises a cover plate, a touch control plate and a support, wherein the cover plate is provided with a light-emitting surface and a back surface opposite to the light-emitting surface, the touch control plate is arranged on the back surface of the cover plate in a stacking mode, and the support covers the cover plate and the touch control plate and is integrally arranged. The support includes main part and extension, and the main part is around apron and touch pad distribution, and the extension is formed to extending between apron and the touch pad by the main part.

On the other hand, the embodiment of the application also provides an on-vehicle display device, which comprises the cover plate assembly.

In yet another aspect, the present application further provides a method for manufacturing a cover assembly, which includes stacking a cover plate and a touch pad, and placing the stacked cover plate and touch pad into an injection mold with a predetermined gap in the circumferential direction to form a workpiece to be coated; and injecting the molten injection molding material into an injection mold, and enabling the injection molding material to cover the periphery of the workpiece to be coated and be embedded into the gap between the cover plate and the touch control plate for a preset distance to form an injection molding part.

Compared with the prior art, the technical scheme provided by the embodiment of the application has at least the following advantages:

in the cover plate assembly, the manufacturing method of the cover plate assembly and the vehicle-mounted display device, the cover plate assembly comprises the cover plate, the touch control plate and the support, wherein the touch control plate is attached to the cover plate through the bonding layer, the cover plate and the touch control plate are wrapped and fixed, and therefore the warping problem of the injection-molded cover plate caused by factors such as uneven stress, material shrinkage and the like can be effectively solved.

Drawings

Other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and which are not to scale.

Fig. 1 is a schematic structural diagram of a cover plate assembly according to an embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional view of the region A-A' in FIG. 1;

FIG. 3 is a schematic partial view of another cover plate assembly according to an embodiment of the present disclosure;

FIG. 4 is a schematic cross-sectional view of another cover plate assembly according to an embodiment of the present disclosure;

fig. 5 is a partial schematic structural view of another cover plate assembly provided in an embodiment of the present application;

fig. 6 is a schematic structural diagram of an on-vehicle display device according to an embodiment of the present application;

FIG. 7 is a schematic structural diagram of another vehicle-mounted display device provided in the embodiment of the present application;

fig. 8 is a schematic flow chart illustrating a manufacturing method of a cover plate assembly according to an embodiment of the present disclosure.

In the figure:

10-a cover plate assembly; 20-a display component;

11-a cover plate; 111-black matrix; 12-a light transmissive fill layer; 13-a touch pad; 14-a scaffold; 141-a body portion; 142-an extension; 15-circuit routing;

21-display panel.

Detailed Description

Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.

It should be noted that the terms "comprises," "comprising," or any other variation thereof in the description and claims of this application and the above-described drawings are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a cover plate assembly according to an embodiment of the present disclosure, and fig. 2 is a schematic cross-sectional structure of an area a-a' in fig. 1. The embodiment of the application provides a apron subassembly, can be applied to on-vehicle display device. The cover plate assembly 10 includes a cover plate 11, a touch pad 13 and a bracket 14, the bracket 14 covers the cover plate 11 and the touch pad 13 and is integrally disposed, the bracket 14 includes a main body portion 141 and an extension portion 142, the main body portion surrounds the cover plate 11 and the touch pad 13, and the extension portion 142 is formed by extending the main body portion 141 between the cover plate 11 and the touch pad 13.

In the cover plate assembly provided by the embodiment of the application, the support 14 covers the cover plate 11 and the touch pad 13 and is integrally arranged, the cover plate 11 and the touch pad 13 support the support 14 from the inside, and the warping problem of the injection-molded cover plate caused by factors such as uneven stress, material shrinkage and the like can be effectively solved. The part of the cover plate assembly used for touch input is a part of the light-emitting surface of the cover plate 11, and the glass material has certain hardness and texture and can provide good touch operation hand feeling.

The cover plate 11 in the embodiment of the present application is a flat plate made of glass, and an orthographic projection of the cover plate 11 in the thickness direction of the cover plate 11 is rectangular, circular or polygonal, and the embodiment of the present application has no specific limitation on the shape, contour and size of the cover plate 11, and the shape, contour, size and the like of the cover plate 11 can be designed according to actual needs. The material of the cover plate 11 may be conventional glass without surface treatment or a glass material strengthened by one or more of anti-fingerprint (AF) treatment, anti-reflection and anti-reflection (AR) treatment, and anti-glare (AG) treatment, and the strengthening treatment can respectively meet various functional requirements of the touch device, such as wear resistance, anti-glare, and the like, and the specific material may be selected according to actual requirements. The thickness of the cover plate 11 in the first direction perpendicular to the light emitting surface of the vehicle-mounted display device is matched with the thickness of the injection-molded bracket 14 in the first direction, the thickness can be 1.1 mm-2.0 mm, and the specific thickness can be selected according to actual requirements.

It is to be understood that both the foregoing description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

It is understood that the touch pad 13 is a touch input device that converts a touch operation of a user into a corresponding electrical signal. The touch panel 13 is stacked on the cover plate 11 and bonded by the light-transmitting filling layer 12. In some optional embodiments, the touch pad 13 is a capacitive touch pad, which has high precision, sensitive response, multi-touch capability, and long service life. In some optional specific embodiments, the cover plate 11 is a Glass cover plate, the cover plate 11 and the touch pad 13 may be combined to form a capacitive touch screen with a conventional G + G (Glass + Glass, i.e., the cover plate and the touch pad are both made of Glass) structure, and the surface of the Glass material makes the G + G touch screen more wear-resistant and corrosion-resistant, and has high light transmittance and good display effect.

It can be understood that, when the cover assembly is applied to the vehicle-mounted display device, the cover 11 is disposed close to the light-emitting surface of the vehicle-mounted display device relative to the touch pad 13.

The bracket 14 in the embodiment of the present application is an integrally molded injection-molded component, and the material used for the bracket 14 is a material that can be injection-molded. In some alternative embodiments, the bracket 14 is integrally molded by In-Molding Decoration (IMD) and/or In-Molding Label (IML) technology, and the bracket 14 covers and fixes the cover plate 11 and the touch pad 13.

In some examples, the orthographic projection of the stent 14 in the first direction is rectangular, but the shape, contour and size of the stent 14 in the embodiments of the present application are not particularly limited, and the shape, contour and size of the stent 14 may be designed according to actual needs, for example, the orthographic projection of the stent 14 in the first direction may also be circular, oval, polygonal and other shapes.

In the cover plate assembly 10 provided in the embodiment of the present application, the thickness of the support 14 in the first direction is generally 2mm to 5mm, and the ratio of the thickness of the support 14 to the thickness of the light-transmissive filling layer 12 in the first direction is 5: 1-10: 1, the ratio of the thickness of the bracket 14 to the thickness of the cover plate 11 in the first direction may be 2: 1-5: 1, the thickness of the support 14, the thickness of the light-transmitting filling layer 12, and the thickness of the cover plate 11 are not particularly limited in the embodiments of the present application, and different thicknesses may be selected according to different use requirements or process requirements.

The injection molding method for producing the bracket 14 in the embodiment of the present application may adopt a common injection molding method in the prior art, and the cover plate 11 and the touch pad 13 to be coated are placed in an injection mold in a stacked manner for injection molding, demolding and cooling. The injection molding material used in the bracket 14 in the embodiment of the present application may be one or more of polycarbonate, polymethylmethacrylate, terpolymer of acrylonitrile, butadiene and styrene, copolymer of propylene and styrene, polystyrene, polyvinyl chloride, polyethylene, polypropylene, and other injection molding materials commonly used in the art, and may be specifically selected according to the use requirement and the process requirement.

In the cover assembly 10 provided in the embodiment of the present application, an area of an orthographic projection pattern of the cover plate 11 on the light-emitting surface is compared with an area of an orthographic projection pattern of the touch pad 13 on the light-emitting surface, wherein a certain preset distance exists between an orthographic projection line of a side surface of the cover plate 11 or the touch pad 13 on the light-emitting surface corresponding to the smaller area and an orthographic projection line of a side surface of the light-transmissive filling layer 12 on the light-emitting surface. The preset distance is generally not less than 0.5mm, and different preset distances can be selected according to different processing and use requirements in the process. The preset distance can enable a preset gap part to exist between the cover plate 11 and the touch pad 13 at the peripheral edge position of the light-transmitting filling layer, so that in the process of injection molding of the support 14, injection molding material particles can enter the gap part and are cured to form the extension part 142, the contact area between the support 14 and the cover plate 11 and between the support 14 and the touch pad 13 is increased, the support 14 can better cover, support and fix the cover plate 11 and the touch pad 13, the cover plate 11 and the touch pad 13 which are attached and fixed through the bonding layer are prevented from being impacted by external force and separated from the support 14, and the impact resistance and the reliability of the cover plate assembly 10 are improved.

Optionally, an area of an orthographic projection pattern of the cover plate 11 of the cover plate assembly 10 on the light-emitting surface is larger than an area of an orthographic projection pattern of the touch pad 13 on the light-emitting surface. The side surface of the touch pad 13 is connected to the surface of the cover plate 11 by a chamfer, so that during the injection molding process, the injection molding material particles used when forming the bracket 14 can enter the gap between the cover plate 11 and the touch pad 13 in a larger amount and solidify to form the extension portion 142, so as to increase the contact area between the bracket 14 and the cover plate 11 and the touch pad 13, and the bracket 14 can better cover, support and fix the cover plate 11 and the touch pad 13.

In some optional specific implementation manners of the embodiment of the application, the chamfer connection is a chamfer connection, the width of a bevel edge formed after chamfering is generally 0.15 mm-3 mm, and different chamfer angles and chamfer widths can be selected according to different use requirements in the process. Compared with the rounded corners, the rounded corners facilitate the flow of the molding material particles, so that a larger amount of the molding material particles can enter the predetermined gap portion between the cover plate 11 and the touch pad 13 to be cured to form the extension portion 142.

Referring to fig. 3, fig. 3 is a partial schematic structural view of another cover plate assembly according to an embodiment of the present disclosure. In the cover assembly, an annular black matrix 111 is disposed at the peripheral edge of the surface of the cover plate 11 facing the touch pad 13, the outer edge of the black matrix 111 coincides with the outer edge of the surface of the cover plate 11 facing the touch pad 13, and an orthographic projection pattern of the black matrix 111 on the light-emitting surface partially overlaps with an orthographic projection pattern of the light-transmissive filling layer 12 on the light-emitting surface. The black matrix 111 is used for blocking light, so that the edge lines of the light-transmitting filling layer 12 and the touch panel 13 cannot be observed from the light-emitting surface direction, and meanwhile, light leakage is prevented, and the display effect can be improved. The material of the black matrix 111 may be a material having a certain light shielding rate, which is commonly used in the art, such as resin and ink.

The embodiment of the present application does not specifically limit the arrangement and thickness of the black matrix, and in some optional specific embodiments of the embodiment of the present application, the black matrix may be formed by screen printing ink at a designated position and curing, and the thickness of the ink layer may be 200 μm to 500 μm.

Optionally, in the cover assembly 10 provided in this embodiment of the application, the touch pad 13 is provided with corresponding circuit traces 15 on a side surface away from the cover plate 11 in the thickness direction of the touch pad, and the corresponding circuit traces are used for being connected with corresponding electronic components such as a display assembly and transmitting an electrical signal, so that the cover assembly can completely have a function of receiving a touch input.

In some optional specific embodiments of the embodiment of the present application, the Circuit trace of the touch panel 13 is in a Flexible Printed Circuit (FPC) form, a Printed substrate of the Flexible Circuit board may be a polyimide or mylar, and the Flexible Circuit has excellent characteristics of thin thickness, good heat dissipation, free bending and folding, and the like, so that the volume and the weight of the display device can be effectively reduced.

Referring to fig. 4, fig. 4 is a schematic cross-sectional view of another cover assembly according to an embodiment of the present disclosure, in which an orthographic projection area of a cover 11 on a light-emitting surface of the cover assembly 10 is smaller than an orthographic projection area of a touch pad 13 on the light-emitting surface. The side of the cover plate 11 is connected to the surface of the touch pad 13, which is chamfered, and the related description of the chamfer is the same as that described in the previous embodiment, and is not repeated herein.

Referring to fig. 5, fig. 5 is a partial structural schematic view of another cover plate assembly according to an embodiment of the present application, wherein a partial structure of the embodiment provided in fig. 4 is shown. In the cover plate assembly, an annular black matrix 111 is disposed at the peripheral edge of the surface of the cover plate 11 facing the touch panel 13, a chamfer is disposed at the edge of the surface of the cover plate 11 facing the touch panel 13, and the outer edge line of the black matrix 111 coincides with the inner edge line of the chamfer formed by the chamfer. In the cover assembly 10 provided in the embodiment shown in fig. 5, the corresponding circuit traces 15 are disposed on the surface of the touch pad 13 on the side away from the cover 11 in the thickness direction, and the technical requirements for the circuit traces 15 are the same as those described in the previous embodiment, and are not described herein again.

The cover plate assembly provided in the embodiment of the application can be applied to a vehicle-mounted display device. The cover assembly in the vehicle display device is the aforementioned cover assembly 10, wherein the bracket 14 can change its shape according to the shape limitation of the vehicle console.

Based on the same inventive concept, the application further provides a vehicle-mounted display device, which comprises the cover plate assembly provided by any of the above embodiments.

Referring to fig. 6 and 7 together, fig. 6 and 7 are schematic structural diagrams of two vehicle-mounted display devices according to an embodiment of the present application, where the vehicle-mounted display device includes: a cover plate assembly 10 and a display assembly 20, wherein the structure of the cover plate assembly 10 is the same as that in fig. 1 to 5, and the description thereof is omitted.

The display module 20 provided by the embodiment of the application comprises a display panel 21, and the display surface of the display panel 21 is completely attached and fixedly connected with the cover plate assembly 10. The display surface of the display panel 21 is attached to the surface of the touch pad 13 of the cover assembly 10 away from the light exit surface, and at the same time, the orthographic projection patterns of the display panel 21, the cover 11 and the touch pad 13 on the light exit surface are at least partially overlapped, and the overlapped portion is an effective touch operation and display area. In some alternative embodiments, the shape of the region is illustrated as a rectangle, but the application is not limited thereto, and the shape and area size of the region can be selected according to the use requirement and the process requirement.

Except for display panel 21, can also include parts such as support frame, base, backlight unit, reinforcement glue, soundproof rubber among the display module 20 that this application embodiment provided, display module 20 can be the on-vehicle display module who commonly uses among the prior art, and this application does not do specific restriction to its structure, constitution.

The display panel 21 in the embodiment of the present application may be different types of display screens such as a liquid crystal display screen or an organic light emitting diode display screen, and a user inputs a touch operation signal through the touch panel 13 serving as an interaction input end in the cover plate assembly 10, and outputs a feedback result by using the display panel 21 as an output end after processing.

In the embodiment of the present application, the cover plate assembly 10 and the display assembly 20 may be bonded and fixed in a full-lamination manner by an Optical Clear Resin (OCR) or an Optical Clear Adhesive (OCA). A during laminating bonding entirely for transparent optical element, OCR and OCA's luminousness is high, can fill the space between apron subassembly 10 and the display module 20, can avoid air bed and dust to get into the light loss problem that leads to, restrain the light scattering problem that outside light shines and leads to such as being shaded, improve the demonstration homogeneity of display, use OCR or OCA to carry out laminating entirely simultaneously and can also reduce external force and strike, the problem that the high low temperature change produced when keeping out the laminating, improve the reliability of display screen, thereby prolong display device product life. The material of the joint part of the cover plate component 10 is the same as that of the joint part of the display component 20, and the joint parts are flat glass surfaces, so that the manufacturability and the flatness of joint can be effectively improved, and the good display effect is ensured.

In the on-vehicle display device that this application embodiment provided, apron subassembly 10 and display module 20 laminating fixed connection entirely, the support 14 among the apron subassembly 10 can produce the level and smooth protruding portion that accords with the regional shape of vehicle installation, and the fixed connection of being convenient for is in presetting positions such as car central console installation region, and the fashioned support 14 of integration makes apron subassembly 10 have characteristics small, extensive applicability extensive, not fragile, the installation of being convenient for simultaneously.

Based on the same inventive concept, the present application further provides a manufacturing method of a cover plate assembly, and referring to fig. 8, fig. 8 is a flowchart of the manufacturing method of the cover plate assembly provided in the embodiment of the present application, and the manufacturing method includes:

s1: stacking the cover plate and the touch control plate, and placing the cover plate and the touch control plate into an injection mold with a preset gap in the circumferential direction to form a workpiece to be coated;

s2: injecting a molten injection molding material into an injection mold under a first preset environmental condition, and enabling the injection molding material to cover the periphery of the workpiece to be coated and be embedded into a gap between the cover plate and the touch pad for a preset distance to form an injection molding part;

s3: and curing the injection molded part under a second preset environmental condition, and demolding to form the cover plate assembly.

In step S1, the cover plate 11 and the touch pad 13 are stacked, and the orthographic projection patterns of the cover plate 11, the light-transmissive filling layer 12 and the touch pad 13 in the direction perpendicular to the light exit surface are at least partially overlapped. In the stacked arrangement, the edge of the workpiece to be coated has a predetermined gap in the circumferential direction through the light-transmitting filling layer 12, so that the injection material particles enter the predetermined gap during the injection molding process and are cured to form the extension portion 142 of the bracket 14.

In step S2 provided in the embodiment of the present application, the injection molding process is a molding process technology commonly used in the field of manufacturing display devices, and in step S2, the following process steps may be adopted: adding granular or powdery plastic raw materials into a hopper of an injection machine; heating and melting the raw materials to a flowing state; under the push of a screw or a piston of an injection machine, the mixture enters a mold cavity through a connected nozzle and a pouring system of the mold; and hardening and shaping in a mold cavity so as to form the required shape of the product. The injection molding processing technology adopted in the step has the advantages of automatic production, short processing period, high production efficiency, diversified shapes, accurate size and stable quality.

The injection molding material used in the embodiment of the present application may be one or a mixture of more of polycarbonate, polymethylmethacrylate, terpolymer of acrylonitrile, butadiene and styrene, copolymer of propylene and styrene, polystyrene, polyvinyl chloride, polyethylene, polypropylene, and other injection molding materials commonly used in the art, and may be specifically selected according to the use requirements and the process requirements.

In step S3, the cover plate assembly 10 provided in this embodiment is obtained after curing, demolding and cooling, and the structure thereof is the same as that described above, and is not described herein again.

In steps S2 and S3, the processing parameters of the first and second preset environmental conditions may be conventional injection molding processing parameters commonly used in the prior art, and the processing parameters related to the injection molding process are not specifically limited in the present application on the premise of not damaging the cover plate 11, the light-transmitting filling layer 12, and the touch panel 13.

In some alternative embodiments provided herein, the manufacturing method of the cover plate assembly may include a step of binding the circuit trace 15 to the touch pad 13, and the step may be performed before step S1 or after step S3, which is not limited in this embodiment.

In the cover plate assembly, the vehicle-mounted display device and the manufacturing method of the cover plate assembly, the cover plate assembly comprises: at least one part of the light-emitting surface of the cover plate is a touch operation area, and the texture of the glass material can improve the operation hand feeling; the touch panel is bonded and attached to the cover plate through the light-transmitting filling layer; the support covers the cover plate and is integrally arranged with the touch pad, the support comprises a main body part and an extension part, the main body part is distributed around the cover plate and the touch pad, and the extension part is formed by extending the main body part to the space between the cover plate and the touch pad. Therefore, the problems of loose adhesion and bubble generation caused by warping of the injection molding piece when the injection molding piece is attached to the glass material can be solved.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A cover assembly for a vehicle display device, the cover assembly comprising:

the cover plate is provided with a light-emitting surface and a back surface opposite to the light-emitting surface;

the touch pad is arranged on the back surface of the cover plate in a stacked mode;

the support covers the cover plate and the touch control plate and is integrally arranged, the support comprises a main body part and an extension part, the main body part surrounds the cover plate and the touch control plate, and the extension part is formed by extending the main body part to the space between the cover plate and the touch control plate.

2. The cover plate assembly of claim 1, further comprising a light transmissive filling layer disposed between the cover plate and the touch pad and at least a portion of the peripheral side edge disposed in abutment with the extension portion.

3. The cover assembly of claim 2, wherein an orthographic area of the light-transmissive filling layer on the light-emitting surface is smaller than an orthographic area of the cover on the light-emitting surface and an orthographic area of the touch pad on the light-emitting surface.

4. The cover plate assembly according to claim 2, wherein the light-transmissive filling layer is an adhesive layer, and a ratio of a thickness of the support to a thickness of the light-transmissive filling layer in a direction perpendicular to the light exit surface is 5: 1-10: 1.

5. the cover plate assembly of claim 1, wherein the back edge of the cover plate is provided with an annular black matrix.

6. The cover assembly as claimed in claim 5, wherein an orthographic projection of the black matrix on the light emitting surface partially overlaps with an orthographic projection of the light transmissive filling layer on the light emitting surface.

7. The cover assembly of claim 1, wherein the cover plate orthographically projects on the light exit surface to form a first pattern, and the touch pad orthographically projects on the light exit surface to form a second pattern;

the area of one of the first graph and the second graph is smaller than that of the other graph, the bottom surface and the side surface of the small graph are connected in a chamfering mode to increase the contact area between the supports, and the bottom surface faces the surface of the large graph.

8. The cover assembly of claim 1, wherein an orthographic projection area of the cover on the light emitting surface is smaller than an orthographic projection area of the touch pad on the light emitting surface, and the side surfaces of the cover are connected with the back surface in a chamfered manner; alternatively, the first and second electrodes may be,

the orthographic projection area of the touch pad on the light emitting surface is smaller than that of the cover plate on the light emitting surface, and the side surface of the touch pad is connected with the bottom surface facing the back surface in a chamfer mode.

9. The cover assembly of claim 1, wherein the touch pad is a capacitive touch pad.

10. The cover plate assembly of claim 1, wherein the touch pad includes circuit traces disposed on a surface of the touch pad facing away from the cover plate in a thickness direction of the touch pad.

11. An in-vehicle display device characterized by comprising:

the cover plate assembly of any one of claims 1 to 10;

and the display component is arranged on one side of the cover plate component, which deviates from the light emergent surface.

12. The vehicle-mounted display device according to claim 11, wherein the display assembly comprises a display panel, the display panel has a display surface, and the display surface is attached to a surface of the touch pad facing away from the cover plate.

13. The vehicle-mounted display device of claim 12, wherein orthographic projections of the cover plate, the touch pad and the display panel on the light exit surface at least partially overlap.

14. A method of making a cover plate assembly, comprising:

stacking the cover plate and the touch control plate, and placing the cover plate and the touch control plate into an injection mold with a preset gap in the circumferential direction to form a workpiece to be coated;

injecting a molten injection molding material into the injection mold under a first preset environmental condition, and enabling the injection molding material to cover the periphery of the workpiece to be covered and be embedded into the gap between the cover plate and the touch pad for a preset distance to form an injection molding part;

and curing the injection molded part under a second preset environmental condition, and demolding to form the cover plate assembly.

15. The method for manufacturing a cover plate assembly according to claim 14, wherein the cover plate has a light exit surface and a back surface opposite to the light exit surface, the light exit surface has a light exit area, the cover plate and the touch pad are stacked and placed into an injection mold with a predetermined gap in the circumferential direction to form a workpiece to be coated, a light transmissive filling layer is formed between the cover plate and the touch pad corresponding to the light exit area, and the workpiece to be coated has a gap portion located between the cover plate and the touch pad and located on the circumferential side of the light transmissive filling layer.

16. The method of making a cover plate assembly according to claim 15, wherein said step of injecting molten molding material into said injection mold under a first predetermined environmental condition, said molding material at least partially filling said gap portion.