Blindly convex touch panel and manufacturing process thereof

Abstract

The application relates to a blind convex touch panel and a manufacturing process thereof, which solves the problems of display area ashing and rainbow stripe generation by optimizing the structure and improving the process, and comprises an IML cover plate, a window area of the IML cover plate is in a convex lens shape, and pearl powder is mixed in an ink layer on a diaphragm of the IML cover plate; a film sensor is attached to a lower surface of the IML cover plate; an LCD module is located below the film sensor and is arranged in full attachment with the film sensor; and a shell is used for accommodating and fixing the LCD module and is fixedly connected with the IML cover plate. By adopting the technical scheme, the IML cover plate is designed in a convex lens shape: display content is enlarged, a visible angle is enlarged, and blind operation convenience is improved; AR coating treatment: reflection light is effectively reduced, and display definition is improved; a full-attachment structure: an air layer between an LCD screen and the cover plate is eliminated, light reflection and refraction are reduced, the rainbow stripe problem is solved, and integral black effect is improved.

Description

Technical Field

[0001] This invention relates to the field of automotive interior technology, and in particular to a blind raised touch panel and its manufacturing process. Background Technology

[0002] In automotive interior design, LCD displays and touch panels are not only functional control elements, but also play an important role in enhancing the overall quality and technological feel of the vehicle. Traditional automotive LCD display panels mostly use mechanical button structures, which have limited functions, small display areas, and problems such as graying display areas and obstruction of characters when viewed from the side, making it difficult to meet consumers' needs for personalization and intelligence.

[0003] In addition, in traditional structures, there is an air layer between the LCD screen and the cover plate. Light is reflected and refracted in the air layer, which leads to a decrease in display effect and phenomena such as rainbow patterns. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art by providing a blind convex touch panel and its manufacturing process. By optimizing the structure and improving the process, the problems of graying in the display area and rainbow patterns are solved.

[0005] The purpose of this invention is to provide a blind convex touch panel, comprising: IML cover plate, wherein the viewing window area of ​​the IML cover plate is provided with a convex lens structure, and the ink layer on the film of the IML cover plate is mixed with pearlescent powder. Thin-film sensor, attached to the lower surface of IML cover plate; The LCD module is located below the thin-film sensor and is fully bonded to the thin-film sensor. The housing is used to accommodate and fix the LCD module, and is fixedly connected to the ILM cover plate; The charging module, integrated within the housing, provides charging and data transmission functions.

[0006] A further feature of the present invention is that the outer surface of the IML cover plate is provided with an AR coating layer, which is formed by vacuum magnetron sputtering and includes multiple alternating layers of high and low refractive index materials.

[0007] A further feature of the present invention is that the IML cover plate and the thin-film sensor are fully bonded together using OCA optical adhesive; and the thin-film sensor and the LCD module are bonded together using OCR optically transparent resin.

[0008] A further feature of the present invention is that the IML cover plate is sealed with a dam RTV on the outer periphery of the thin-film sensor to define the filling area of ​​the OCR.

[0009] A further feature of the present invention is that the LCD module includes a liquid crystal glass and a backlight module, wherein the backlight module is located below the liquid crystal glass and is used to provide a backlight source.

[0010] Another object of the present invention is to provide a manufacturing process for the above-mentioned blind convex touch panel, comprising the following steps: Step S1: Remove dust from the surface of the IML cover plate; Step S2: The processed IML cover plate and the thin film sensor are bonded together using OCA optical adhesive to form a cover plate assembly; Step S3: Attach height-limiting foam to the housing, clean the LCD module, and then assemble the LCD module into the housing to form the housing assembly. The LCD module is pressed on the height-limiting foam. Step S4: Apply transparent RTV to the IML cover plate to form a dam; Step S5: Place the cover plate assembly onto the housing, aligning the thin-film sensor with the LCD module; Step S6: Inject OCR optically transparent resin into the dam between the IML cover plate and the LCD module through the pre-reserved injection port on the outer shell to fill the gap between the two. Step S7: Curing the OCR optically transparent resin; Step S8: Perform defoaming and aging treatments to complete the full bonding between the IML cover plate and the LCD module.

[0011] In a further embodiment of the present invention, in step S5, the cover plate assembly is assembled with the outer shell, and after being left to stand until the stress is released, the OCR filling in step S6 is then performed.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. IML cover plate convex lens design: magnifies the displayed content, expands the viewing angle, and improves the convenience of blind operation; 2. Pearl powder mixed with ink: gives the cover a metallic luster and shimmer, enhancing the interior's luxurious and technological feel; 3. AR coating treatment: effectively reduces reflected light and improves display clarity; 4. Fully laminated structure: Eliminates the air layer between the LCD screen and the cover plate, reduces light reflection and refraction, solves the rainbow pattern problem, and improves the seamless black effect; 5. Post-assembly OCR process: Avoids display malformation caused by cover plate deformation and improves display uniformity. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of the present invention; Figure 2This is a schematic diagram of the overall structure from another perspective of a specific embodiment of the present invention; Figure 3 This is an exploded view of a specific embodiment of the present invention; Figure 4 This is a schematic diagram of a half-section structure according to a specific embodiment of the present invention.

[0014] In the diagram: 10, IML cover plate; 20, thin-film sensor; 30, LCD module; 40, housing; 41, height-limiting foam; 51, circuit board; 52, charging interface; 60, external interface; 70, grounding spring. Detailed Implementation

[0015] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] It should be noted that in the description of this invention, all directional indications (such as up, down, forward, backward, etc.) are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0017] Furthermore, in this invention, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. In the description of this invention, "a number" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0018] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0019] like Figure 1-4 As shown, this embodiment provides a blind protrusion touch panel, including: an IML cover plate 10, a thin film sensor 20, an LCD module 30, a housing 40, and a charging module. In this embodiment, the housing 40 includes a snap-fit ​​housing and a base, wherein the bottom of the base is provided with a mounting clip for mounting the panel in the vehicle.

[0020] The IML cover plate 10 is formed by in-mold decoration (IML) process and includes a viewing window area with several convex lens structures, which can increase the viewing distance and at the same time increase the blind operation function. The IML cover plate 10 includes a film, and the ink layer on the film is mixed with pearlescent powder. The "ink layer on the film of the IML cover plate 10" refers to the ink layer pre-printed on the film substrate in the IML process. After the IML cover plate is formed, the ink layer becomes part of the cover plate and is located on the inner surface or middle layer of the cover plate. The pearlescent powder is mixed in the ink layer to achieve a metallic luster and shimmer.

[0021] The outer surface of the IML cover plate 10 is provided with an AR coating layer, which is formed by vacuum magnetron sputtering to deposit different numbers of high and low refractive layers on the substrate surface, thereby causing half-wave loss of light and reducing reflected light.

[0022] The thin-film sensor 20 is attached to the lower surface of the IML cover plate 10 to realize the touch sensing function, so that the user can operate the corresponding control function by touching the characters displayed on the window area of ​​the IML cover plate 10 which is shaped like a convex lens. The IML cover plate 10 and the thin-film sensor 20 are bonded together by OCA optical adhesive. The thin-film sensor is a transparent touch sensor.

[0023] The LCD module 30 is located below the thin-film sensor 20 and is fully bonded to the thin-film sensor 20. The LCD module 30 includes an LCD and a backlight module. The backlight module is located below the LCD and is used to provide a backlight source.

[0024] The outer shell 40 is used to accommodate and fix the LCD module 30. The outer shell 40 is covered with height-limiting foam 41, i.e., the upper side of the shell, for placing the LCD module. The IML cover plate 10 is placed on the outer shell 40 and fixedly connected by snap-fit. The outer shell 40 has a reserved glue injection port. After the IML cover plate 10 is fixed on the outer shell 40, it is left to stand for a period of time to release stress. OCR optical transparent resin is injected into the space between the IML cover plate 10 and the LCD module 30 through the glue injection port to fill and bond them.

[0025] An external interface 60 is provided at the bottom of the housing 40, that is, it is located on the underside of the base. The external interface 60 is electrically connected to the circuit board 51 through a pin header. The external interface 60 is used to connect to an external plug to introduce power and / or signals.

[0026] The charging module is integrated within the housing 40 and is used to provide charging and data transmission functions. The charging module includes a circuit board 51, which is fixed between the base and the housing by screws. The circuit board 51 is electrically connected to the LCD module 30 and the thin-film sensor 20. The circuit board 51 is also provided with a charging interface 52, which is exposed outside the IML cover plate 10 and can be used to connect to external devices for charging. The energy storage device of this device can be external or fixedly installed inside the housing.

[0027] The charging module also includes a grounding spring plate 70, one end of which is electrically connected to the ground electrode of the circuit board 51, and the other end is elastically abutted against the bottom of the LCD module 30 to provide a grounding circuit.

[0028] This embodiment also provides a manufacturing process for the above-mentioned blind convex touch panel, including the following steps: Step S1: Perform dust removal treatment on the surface of the IML cover plate 10; Step S2: The processed IML cover plate 10 and the thin film sensor 20 are bonded together with OCA optical adhesive to form a cover plate assembly; Step S3: Attach height-limiting foam 41 to the housing, clean the LCD module 30, and then install the LCD module 30 into the housing 40 to form a housing assembly. The LCD module 30 is pressed on the height-limiting foam 41. Step S4: Coat the IML cover plate 10 with transparent RTV to form a dam; the dam surrounds the thin film sensor 20 outwards; Step S5: Place the cover plate assembly onto the housing 40, align the thin film sensor 20 with the LCD module 30, and let it stand for a period of time to release stress; Step S6: Inject OCR optically transparent resin into the dam between the IML cover plate 10 and the LCD module 30 through the pre-reserved injection port on the outer shell 40 to fill the gap between them. Step S7: Curing the OCR optically transparent resin; Step S8: Perform defoaming and aging treatment to complete the full bonding between the IML cover plate 10 and the LCD module 30.

Claims

1. A blind convex touch panel, characterized in that: include: IML cover plate (10), the window area of ​​the IML cover plate (10) is provided with a convex lens structure, and the ink layer on the film of the IML cover plate (10) is mixed with pearl powder. A thin-film sensor (20) is attached to the lower surface of the IML cover plate (10); The LCD module (30) is located below the thin-film sensor (20) and is fully fitted with the IML cover plate (10); Housing (40) for housing and fixing LCD module (30); The charging module, integrated within the housing (40), is used to provide charging and data transmission functions.

2. The blind convex touch panel according to claim 1, characterized in that: The outer surface of the IML cover plate (10) is provided with an AR coating layer, which is formed by vacuum magnetron sputtering and includes multiple alternating layers of high and low refractive index materials.

3. A blind convex touch panel according to claim 1, characterized in that: The IML cover plate (10) and the thin film sensor (20) are bonded together by OCA optical adhesive; the thin film sensor (20) and the LCD module (30) are bonded together by OCR optical transparent resin filling.

4. A blind convex touch panel according to claim 3, characterized in that: The IML cover plate (10) is sealed with a dam RTV on the outside of the thin film sensor (20) to define the filling area of ​​the OCR.

5. A blind convex touch panel according to claim 1, characterized in that, The LCD module (30) includes a liquid crystal glass and a backlight module, the backlight module being located below the liquid crystal glass and used to provide a backlight source.

6. A blind convex touch panel according to claim 1, characterized in that, The charging module includes a circuit board (51), which is electrically connected to the LCD module (30) and the thin film sensor (20). An external interface (60) is provided at the bottom of the housing (40), which is electrically connected to the circuit board (51) through pin headers. A charging interface (52) is also provided on the circuit board (51), which is exposed outside the IML cover plate (10).

7. A blind convex touch panel according to claim 6, characterized in that, It also includes a grounding spring sheet (70), one end of which is electrically connected to the ground electrode of the circuit board (51), and the other end is elastically abutting against the bottom of the LCD module (30).

8. A manufacturing process for a blind convex touch panel as described in any one of claims 1 to 7, characterized in that, Includes the following steps: Step S1: Perform dust removal treatment on the surface of the IML cover plate (10); Step S2: The processed IML cover plate (10) and the thin film sensor (20) are bonded together with OCA optical adhesive to form a cover plate assembly; Step S3: Attach height-limiting foam (41) to the shell, remove dust from the LCD module (30), and then install the LCD module (30) into the shell (40) to form a shell assembly. The LCD module (30) is pressed on the height-limiting foam (41). Step S4: Coat the IML cover plate (10) with transparent RTV to form a dam; Step S5: Place the cover plate assembly onto the housing (40), and align the thin film sensor (20) with the LCD module (30); Step S6: Inject OCR optically transparent resin into the dam between the IML cover plate (10) and the LCD module (20) through the pre-reserved injection port on the outer shell (40) to fill the gap between the two. Step S7: Curing the OCR optically transparent resin; Step S8: Perform defoaming and aging treatment to complete the full bonding between the IML cover plate (10) and the LCD module (30).

9. The manufacturing process according to claim 7, characterized in that, In step S5, after the cover plate assembly and the outer shell (40) are assembled, the stress is released by letting it stand still before the OCR filling in step S6 is performed.

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