3D touch light-emitting plaque, preparation method thereof and motor vehicle

Abstract

The invention discloses a 3D touch light-emitting decoration plate and a preparation method thereof and a motor vehicle, and relates to the technical field of light-emitting decoration plates. A metal conductive layer, a light-emitting layer, a transparent conductive layer, a first transparent insulating layer, a transparent touch layer and a colored paint layer are sequentially sprayed on the surface of a carrier through a spraying technology; according to the technical scheme, the spraying technology is adopted so that all the coatings can be evenly coated and attached to the surface of the carrier, even for a complex 3D shape, the continuity and uniformity of all the coatings can be guaranteed, all the coatings can be matched with the curved surface and the shape of the carrier, and the design and manufacturing difficulty of the 3D touch light-emitting plaque is lowered. A light-emitting layer is sprayed on the 3D touch control light-emitting decoration plate through a spraying technology, the light-emitting layer is an area light source, and even light emitting can be achieved when a carrier is in a complex 3D shape. As the distance between the transparent touch layer and the colored paint layer is very small, the touch sensitivity is improved; the coatings are tightly combined through a spraying process, so that the stability of touch signal transmission is ensured, and a good touch function can be realized.

Description

Technical Field

[0001] The present application relates to the technical field of luminous panels, and in particular to a 3D touch-sensitive luminous panel, a preparation method thereof, and a motor vehicle. Background Art

[0002] With the rapid development of smart cars, a large number of traditional mechanical switches and monotonous plastic panels in car cabins are gradually being replaced by simple and beautiful touch switches and ambient lighting panels. In order to bring a more coordinated and unified visual effect, the touch switches and ambient lighting panels are seamlessly integrated together.

[0003] Existing touch-sensitive luminous panels include a decorative panel (the decorative panel includes a carrier and a color lacquer layer on the front of the carrier), a backlight mounted on the back of the carrier, and a touch layer. The backlight includes a light guide plate and light-emitting diodes (LEDs) soldered to a printed circuit board (PCB). The touch layer includes a capacitive sensor and a touch chip soldered to the PCB. The capacitive sensor includes optical adhesive and a capacitive film. Because the combined thickness of the backlight and touch layer of existing touch-sensitive luminous panels is generally greater than 2cm, the backlight and touch layer are typically mounted on the back of the carrier. When a user touches the touch area on the color lacquer layer on the front of the carrier, the capacitive film senses the capacitance signal change caused by the finger touch. This signal is transmitted to the touch chip soldered to the PCB, which controls the LEDs to illuminate. The light emitted by the LEDs is then guided and diffused by the light guide plate, illuminating the color lacquer layer. The function of the light guide plate is to diffuse the light emitted by the LED lamp beads throughout the entire panel. For decorative panels with a simple three-dimensional (3D) surface shape, the shape of the light guide plate needs to match the curved surface of the carrier, which increases the difficulty of designing and manufacturing the light guide plate. The high curvature and small bend radius of the decorative panel surface make the light path design of the light guide plate more complex. In addition, the LED lamp beads are point light sources, and the light propagation process is prone to localized areas of excessive brightness or darkness, resulting in uneven illumination. The capacitive sensor needs to fit tightly to the surface of the carrier to ensure accurate transmission of touch signals. For decorative panels with a simple 3D surface shape, the shape of the capacitive sensor needs to match the curved surface of the carrier, which increases the difficulty of manufacturing and installing the capacitive sensor. The high curvature and small bend radius of the decorative panel surface makes it more difficult to fit the capacitive sensor, and it is easy for a gap to appear between the capacitive sensor and the carrier, resulting in unstable touch signal transmission.

[0004] Therefore, how to reduce the difficulty of designing and manufacturing 3D touch luminous panels, and how to achieve uniform luminescence and good touch function are problems that technical personnel in this field need to solve. Summary of the Invention

[0005] The purpose of this application is to provide a 3D touch-sensitive luminous panel, a preparation method thereof, and a motor vehicle, so as to solve the problems of difficulty in designing and manufacturing touch-sensitive luminous panels, uneven luminescence, and unstable touch function.

[0006] To solve the above technical problems, the present application provides a method for preparing a 3D touch luminous decorative panel, comprising:

[0007] Grinding and polishing the surface of the carrier;

[0008] Spraying a metal conductive layer on the surface of the carrier after grinding and polishing and drying;

[0009] Spraying a luminescent layer on the surface of the dried metal conductive layer and drying the layer;

[0010] Spraying a transparent conductive layer on the surface of the dried light-emitting layer and drying it;

[0011] spraying a first transparent insulating layer on the surface of the dried transparent conductive layer and drying the layer;

[0012] spraying a transparent touch layer on the surface of the dried first transparent insulating layer and drying the layer;

[0013] A color paint layer is sprayed on the dried transparent touch layer surface and dried.

[0014] In a feasible embodiment, it further includes:

[0015] The conductive layer is divided into a plurality of conductive areas by a self-feedback laser etching process, and the transparent touch layer is divided into a plurality of transparent touch areas by a self-feedback laser etching process; wherein the conductive layer includes a metal conductive layer and a transparent conductive layer.

[0016] In a feasible embodiment, a self-feedback laser etching process is used to divide the conductive layer into multiple conductive regions, including:

[0017] Connecting each conductive area in the conductive layer to a pin;

[0018] Use the laser to scan the current conductive area multiple times in succession at a preset power and a preset speed;

[0019] When the capacitance value of the pin corresponding to the current conductive area detected by the capacitance detection module suddenly changes to a set capacitance value, the laser is controlled to stop etching the current conductive area;

[0020] The next conductive region is applied to the current conductive region, and the step of using the laser to continuously scan the current conductive region multiple times at a preset power and preset speed is entered until etching of all conductive regions in the conductive layer is completed.

[0021] The present application also provides a 3D touch luminous decorative plate, comprising: a carrier, a metal conductive layer, a luminous layer, a transparent conductive layer, a first transparent insulating layer, a transparent touch layer, a color paint layer and a printed circuit board assembly;

[0022] The metal conductive layer is provided on the surface of the carrier by a spraying process, the light-emitting layer is provided on the surface of the metal conductive layer by a spraying process, the transparent conductive layer is provided on the surface of the light-emitting layer by a spraying process, the first transparent insulating layer is provided on the surface of the transparent conductive layer by a spraying process, the transparent touch layer is provided on the surface of the first transparent insulating layer by a spraying process, and the colored paint layer is provided on the surface of the transparent touch layer by a spraying process. The printed circuit board assembly includes a printed circuit board and a touch detection module and a driving power module assembled on the printed circuit board, the touch detection module is connected to the transparent touch layer, and the driving power module is respectively connected to the transparent conductive layer and the metal conductive layer.

[0023] In a feasible embodiment, a dielectric layer is further included, and the dielectric layer is sprayed between the metal conductive layer and the light-emitting layer through a spraying process.

[0024] In a feasible embodiment, a second transparent insulating layer is further included, and the second transparent insulating layer is sprayed between the transparent touch layer and the color paint layer through a spraying process.

[0025] In a feasible embodiment, the light-emitting layer includes multiple layers, the number of transparent conductive layers is the same as the number of light-emitting layers, the light-emitting layers and the transparent conductive layers are alternately arranged, and each light-emitting layer uses electroluminescent powder that emits light of different colors.

[0026] In a feasible embodiment, the metal conductive layer includes multiple metal conductive areas, the transparent conductive layer includes multiple transparent conductive areas, the transparent touch layer includes multiple transparent touch areas, the transparent touch areas are arranged in a one-to-one correspondence with the transparent conductive areas, and the transparent conductive areas are arranged in a one-to-one correspondence with the metal conductive areas. The touch detection module is respectively connected to each of the transparent touch areas, and the driving power supply module is respectively connected to each of the metal conductive areas and each of the transparent conductive areas.

[0027] In a feasible embodiment, a primer layer is further included, and the primer layer is sprayed between the carrier and the metal conductive layer through a spraying process.

[0028] The present application also provides a motor vehicle comprising the aforementioned 3D touch-sensitive luminous panel.

[0029] The present application provides a method for preparing a 3D touch luminous plaque, which utilizes a spraying process to sequentially spray a metal conductive layer, a luminescent layer, a transparent conductive layer, a first transparent insulating layer, a transparent touch layer, and a color paint layer on the surface of a carrier. The spraying process allows each coating layer to be evenly coated and adhered to the surface of the carrier. Even for complex 3D shapes, the continuity and uniformity of each coating layer can be guaranteed, and each coating layer can match the curved surface and shape of the carrier. Unlike existing touch luminous plaques, which require complex shape design of the light guide plate and capacitive sensor to match and adhere to the carrier, the design and manufacturing difficulty of the 3D touch luminous plaque is reduced. By spraying the luminescent layer on the 3D touch luminous plaque through the spraying process, the luminescent layer can match the curved surface and shape of the carrier, and the luminescent layer is a surface light source, so uniform light emission can be achieved even if the carrier is a complex 3D shape. The spraying process can achieve a total thickness of the metal conductive layer, luminous layer, transparent conductive layer, first transparent insulating layer and transparent touch layer of less than 0.5cm. The structure is light and thin, which reduces the weight of the 3D touch luminous panel. Since the distance between the transparent touch layer and the paint layer (operating surface) is very small, the touch sensitivity is improved, and a faster and more accurate touch response can be achieved; the various coatings are tightly combined through the spraying process, which ensures the stability of the touch signal transmission and can achieve good touch function.

[0030] The beneficial effects of the 3D touch-sensitive luminous panel and motor vehicle provided in this application correspond to the method, and the effects are as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0032] Figure 1 This is a cross-sectional view of an existing product;

[0033] Figure 2 A top view of an existing product;

[0034] Figure 3 A flow chart of a method for preparing a 3D touch-sensitive luminous decorative panel provided in an embodiment of the present application;

[0035] Figure 4 A flow chart of another method for preparing a 3D touch-sensitive luminous decorative panel provided in an embodiment of the present application;

[0036] Figure 5 A cross-sectional view of the first 3D touch luminous panel provided in an embodiment of the present application;

[0037] Figure 6A cross-sectional view of a second 3D touch luminous panel provided in an embodiment of the present application;

[0038] Figure 7 A cross-sectional view of a third 3D touch luminous panel provided in an embodiment of the present application;

[0039] Figure 8 A cross-sectional view of a fourth 3D touch luminous decorative panel provided in an embodiment of the present application;

[0040] Figure 9 A schematic diagram of a conductive layer provided in an embodiment of the present application;

[0041] Figure 10 A schematic diagram of a conductive layer including multiple conductive regions provided in an embodiment of the present application;

[0042] Figure 11 A schematic diagram of over-etching and under-etching of a conductive layer provided in an embodiment of the present application;

[0043] Figure 12 A schematic diagram of the connection between a conductive layer, a pin and a capacitance detection module provided in an embodiment of the present application;

[0044] Figure 13 A schematic diagram showing the connection between another conductive layer, pin needle, and capacitance detection module provided in an embodiment of the present application;

[0045] Figure 14 A schematic diagram of a change in capacitance value provided in an embodiment of the present application;

[0046] Figure 15 A schematic diagram of a car charging port cover provided in an embodiment of the present application;

[0047] Figure 16 This is an exploded view of a car charging port cover provided in an embodiment of the present application.

[0048] The accompanying drawings are numbered as follows: 1-carrier, 2-color paint layer, 3-light guide plate, 4-LED lamp beads, 5-printed circuit board, 6-optical adhesive, 7-capacitor film, 8-touch chip, 9-touch part, 10-metal conductive layer, 11-dielectric layer, 12-light-emitting layer, 1201-first light-emitting layer, 1202-second light-emitting layer, 13-transparent conductive layer, 1301-first transparent conductive layer, 1302-second transparent conductive layer, 14-first transparent insulating layer Layer, 15-transparent touch layer, 16-second transparent insulating layer, 17-printed circuit board assembly, 1701-touch detection module, 1702-driving power module, 18-conductive layer, 1801-conductive area, 19-laser, 20-pin needle, 21-capacitance detection module, 22-first layer, 23-second layer, 24-third layer, 25-fourth layer, 26-fifth layer, 27-sixth layer, 28-seventh layer, 29-eighth layer. DETAILED DESCRIPTION

[0049] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0050] Figure 1 This is a cross-sectional view of an existing product. Figure 2 A top view of an existing product, such as Figure 1 and Figure 2 As shown, the existing touch-sensitive luminous decorative panel includes a decorative panel (the decorative panel includes a carrier 1 and a color paint layer 2 provided on the front of the carrier 1), a backlight source and a touch layer installed on the back of the carrier 1; wherein, the backlight source includes a light guide plate 3 and LED lamp beads 4 welded on a printed circuit board 5, and the touch layer includes a capacitive sensor and a touch chip 8 welded on the printed circuit board 5, and the capacitive sensor includes an optical glue 6 and a capacitive film 7, and the capacitive film 7 is connected to the touch chip 8. A touch portion 9 is provided on the color paint layer 2 on the front of the carrier 1, and the touch portion 9 is used to indicate user touch. The total thickness of the backlight source and touch layer of the existing touch-sensitive luminous decorative panel is generally greater than 2 cm. When the surface shape of the touch-sensitive luminous decorative panel is a simple 3D shape, it often faces the problems of high design and manufacturing difficulty and poor uniformity of light emission; when the surface shape of the touch-sensitive luminous decorative panel is a high curvature and small bending radius, good light emission and touch functions will be difficult to achieve.

[0051] The core of this application is to provide a 3D touch luminous panel, a preparation method thereof, and a motor vehicle, which are used to reduce the difficulty of designing and manufacturing the 3D touch luminous panel, and to achieve uniform luminescence and good touch function.

[0052] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0053] Figure 3 A flow chart of a method for preparing a 3D touch luminous decorative plate provided in an embodiment of the present application, such as Figure 3 As shown, the preparation method of the 3D touch luminous plaque includes:

[0054] S10: Grinding and polishing the surface of the carrier.

[0055] S11: spraying a metal conductive layer on the surface of the carrier after the grinding and polishing process and drying it.

[0056] S12: spraying a light-emitting layer on the surface of the dried metal conductive layer and drying the layer.

[0057] S13: spraying a transparent conductive layer on the surface of the dried light-emitting layer and drying it.

[0058] S14: spraying a first transparent insulating layer on the surface of the dried transparent conductive layer and drying the layer.

[0059] S15: spraying a transparent touch layer on the dried surface of the first transparent insulating layer and drying the layer.

[0060] S16: spraying a color paint layer on the dried surface of the transparent touch layer and drying the layer.

[0061] A 3D touch luminous decorative plate is prepared through steps S10 to S16, and the 3D touch luminous decorative plate includes: a carrier 1, a metal conductive layer 10, a luminous layer 12, a transparent conductive layer 13, a first transparent insulating layer 14, a transparent touch layer 15, and a paint layer 2; the metal conductive layer 10 is provided on the surface of the carrier 1 by a spraying process, the luminous layer 12 is provided on the surface of the metal conductive layer 10 by a spraying process, the transparent conductive layer 13 is provided on the surface of the luminous layer 12 by a spraying process, and the first transparent insulating layer 14 is provided on the transparent conductive layer 13 by a spraying process. The transparent touch layer 15 is arranged on the surface of the first transparent insulating layer 14 by a spraying process, and the color paint layer 2 is arranged on the surface of the transparent touch layer 15 by a spraying process; the 3D touch luminous decorative panel also includes a printed circuit board assembly 17, the printed circuit board assembly 17 includes a printed circuit board 5 and a touch detection module 1701 and a driving power module 1702 assembled on the printed circuit board 5, the touch detection module 1701 is connected to the transparent touch layer 15, and the driving power module 1702 is respectively connected to the transparent conductive layer 13 and the metal conductive layer 10.

[0062] The embodiment of the present application provides a method for preparing a 3D touch luminous plaque, which utilizes a spraying process to sequentially spray a metal conductive layer 10, a luminous layer 12, a transparent conductive layer 13, a first transparent insulating layer 14, a transparent touch layer 15, and a color paint layer 2 on the surface of a carrier 1. The spraying process allows each coating layer to be evenly coated and adhered to the surface of the carrier 1. Even for complex 3D shapes, the continuity and uniformity of each coating layer can be guaranteed, and each coating layer can match the curved surface and shape of the carrier 1. Unlike existing touch luminous plaques, which require complex shape design of the light guide plate 3 and the capacitive sensor to match and adhere to the carrier 1, the design and manufacturing difficulty of the 3D touch luminous plaque is reduced. The luminous layer 12 is sprayed on the 3D touch luminous plaque through the spraying process, and the luminous layer 12 can match the curved surface and shape of the carrier 1. The luminous layer 12 is a surface light source, and the carrier 1 can achieve uniform light emission even if it is a complex 3D shape. The spraying process can achieve a total thickness of the metal conductive layer 10, the light-emitting layer 12, the transparent conductive layer 13, the first transparent insulating layer 14 and the transparent touch layer 15 of less than 0.5 cm. The structure is light and thin, which reduces the weight of the 3D touch light-emitting decorative panel. Since the distance between the transparent touch layer 15 and the color paint layer 2 (operating surface) is very small, the touch sensitivity is improved, and a faster and more accurate touch response can be achieved; the various coatings are tightly combined through the spraying process, which ensures the stability of the touch signal transmission and can achieve good touch function.

[0063] Based on the above embodiments, Figure 4 A flow chart of another method for preparing a 3D touch luminous decorative plate provided in an embodiment of the present application, such as Figure 4 As shown, the preparation method of the 3D touch luminous plaque includes:

[0064] S20: grinding and polishing the surface of the carrier.

[0065] S21: spraying a primer layer on the polished surface of the carrier and drying it.

[0066] S22: spraying a metal conductive layer on the surface of the dried primer layer and drying it.

[0067] S23: spraying a dielectric layer on the surface of the dried metal conductive layer and drying it.

[0068] S24: spraying a luminescent layer on the surface of the dried dielectric layer and drying the layer.

[0069] S25: spraying a transparent conductive layer on the surface of the dried light-emitting layer and drying it.

[0070] S26: spraying a first transparent insulating layer on the surface of the dried transparent conductive layer and drying the layer.

[0071] S27: spraying a transparent touch layer on the dried surface of the first transparent insulating layer and drying the layer.

[0072] S28: spraying a second transparent insulating layer on the dried surface of the transparent touch layer and drying the layer.

[0073] S29: spraying a color paint layer on the surface of the dried second transparent insulating layer and drying the layer.

[0074] A 3D touch luminous decorative plate is prepared through steps S20 to S29. Figure 5 This is a cross-sectional view of the first 3D touch luminous panel provided in the embodiment of the present application, as shown in FIG. Figure 5 As shown, the 3D touch luminous decorative plate includes: a carrier 1, a primer layer ( Figure 5 ), a metal conductive layer 10, a dielectric layer 11, a light-emitting layer 12, a transparent conductive layer 13, a first transparent insulating layer 14, a transparent touch layer 15, a second transparent insulating layer 16, and a color paint layer 2. The metal conductive layer 10 is provided on the surface of the carrier 1 by a spraying process, the primer layer is sprayed between the carrier 1 and the metal conductive layer 10 by a spraying process, the dielectric layer 11 is sprayed between the metal conductive layer 10 and the light-emitting layer 12 by a spraying process, the light-emitting layer 12 is provided on the surface of the dielectric layer 11 by a spraying process, the transparent conductive layer 13 is provided on the surface of the light-emitting layer 12 by a spraying process, the first transparent insulating layer 14 is provided on the surface of the transparent conductive layer 13 by a spraying process, the transparent touch layer 15 is provided on the surface of the first transparent insulating layer 14 by a spraying process, the second transparent insulating layer 16 is sprayed between the transparent touch layer 15 and the color paint layer 2 by a spraying process, and the color paint layer 2 is provided on the surface of the second transparent touch layer 15 by a spraying process. Figure 6 This is a cross-sectional view of the second 3D touch luminous decorative panel provided in the embodiment of the present application, as shown in FIG. Figure 6 As shown, the 3D touch luminous panel also includes a printed circuit board assembly 17, which includes a printed circuit board 5 and a touch detection module 1701 and a driving power module 1702 assembled on the printed circuit board 5. The touch detection module 1701 is connected to the transparent touch layer 15, and the driving power module 1702 is respectively connected to the transparent conductive layer 13 and the metal conductive layer 10.

[0075] Carrier 1 is made of non-metallic materials such as plastic, glass, wood, stone, and carbon fiber. When the surface of carrier 1 is relatively rough or has very low surface energy, a primer layer can be added between carrier 1 and metal conductive layer 10 to improve surface smoothness and enhance adhesion between carrier 1 and metal conductive layer 10. Metal conductive layer 10 is sprayed onto the surface of the primer layer using copper, silver, graphite, or carbon paint. The desired circuitry is then etched using a self-feedback laser etching process. Dielectric layer 11 is sprayed onto the surface of metal conductive layer 10 using a mixture of barium titanate and resin glue. Dielectric layer 11 effectively stores charge and forms a stable electric field distribution in the electric field. By optimizing the electric field distribution, dielectric layer 11 improves the luminous efficiency and uniformity of light-emitting layer 12. Light-emitting layer 12 is sprayed onto the surface of dielectric layer 11 using electroluminescent powder, which is a mixture of zinc sulfide and metals such as copper, silver, and manganese. The transparent conductive layer 13 is spray-coated onto the surface of the light-emitting layer 12. It is made of a transparent conductive material, polyethylene dioxythiophene (PEDOT), or a mixture of PEDOT with plastic resins and additives. The desired circuitry is then etched using a self-feedback laser etching process. The first transparent insulating layer 14 is spray-coated onto the surface of the transparent conductive layer 13. Materials such as acrylic, silicone, amino, polyurethane, or polyvinyl chloride (PVC) are spray-coated. The transparent touch layer 15 is spray-coated onto the surface of the first transparent insulating layer 14. It is made of a transparent conductive material, PEDOT, or a mixture of PEDOT with various plastic resins and additives. The desired circuitry is then etched using a self-feedback laser etching process. The second transparent insulating layer 16 is spray-coated onto the surface of the transparent touch layer 15. Materials such as acrylic, silicone, amino, polyurethane, or PVC are spray-coated. The color lacquer layer 2 is spray-coated onto the surface of the second transparent insulating layer 16.

[0076] The following describes how the 3D touch luminous panel works: When a user's finger touches the touch portion 9 on the paint layer 2, the transparent touch layer 15 changes its capacitance. The touch detection module 1701 on the printed circuit board 5 detects the change in the capacitance signal of the transparent touch layer 15 and then issues a start command to the drive power module 1702 on the printed circuit board 5. The drive power module 1702 is connected to the metal conductive layer 10 and the transparent conductive layer 13. The metal conductive layer 10 and the transparent conductive layer 13 are the two electrodes of the light-emitting layer 12. When the drive power module 1702 generates alternating current, the light-emitting layer 12 emits light. The metal conductive layer 10 and the transparent conductive layer 13 together form a conductive circuit, providing electrical energy to the light-emitting layer 12. The conductivity and transparency of the transparent conductive layer 13 allow light to pass smoothly, while the metal conductive layer 10 ensures the effective transmission of electrical energy. This synergistic work of conductivity and light emission enables the panel to achieve a luminous effect when touched.

[0077] Based on the above embodiments, Figure 7 This is a cross-sectional view of the third 3D touch luminous panel provided in an embodiment of the present application. Figure 8 This is a cross-sectional view of the fourth 3D touch luminous decorative panel provided in the embodiment of the present application, as shown in FIG. Figure 7 and Figure 8 As shown, the light-emitting layer 12 implemented in this application includes multiple layers, the number of transparent conductive layers 13 is the same as the number of light-emitting layers 12, the light-emitting layers 12 and the transparent conductive layers 13 are alternately arranged, and each light-emitting layer 12 uses electroluminescent powder that emits different colors of light.

[0078] Figure 7 and Figure 8 The lacquer layer 2 includes two luminescent layers 12, designated as the first luminescent layer 1201 and the second luminescent layer 13; and two transparent conductive layers 13, designated as the first transparent conductive layer 1301 and the second transparent conductive layer 1302. A touch detection module 1701 is connected to the transparent touch layer 15, and a driving power module 1702 is connected to the metal conductive layer 10, the first transparent conductive layer 1301, and the second transparent conductive layer 1302, respectively. When a finger touches or approaches the touch portion 9 on the paint layer 2, the touch detection module 1701 detects a change in the capacitance signal of the transparent touch layer 15. This change is transmitted to the driving power module 1702, which adjusts the power output accordingly. This adjustment causes current to flow through the metal conductive layer 10 and the transparent conductive layer 13, thereby causing the luminescent layer 12 to generate light. The material of the luminescent layer 12 undergoes electroluminescence under the action of an electric field, emitting light of a specific color. Different luminescent layer 12 materials can emit different colors of light.

[0079] Since the composition and working principle of the touch detection module 1701 and the composition and working principle of the driving power supply module 1702 are prior arts, they are briefly introduced below.

[0080] Touch detection module 1701 typically consists of a capacitive sensor, a signal processing circuit, and a microcontroller (MCU). The operating principle of touch detection module 1701 is as follows: When a finger approaches or touches the transparent touch layer 15, the capacitance of that area changes. The capacitive sensor converts the detected capacitance change into an electrical signal. The signal processing circuit then amplifies and filters this signal to remove noise interference. The processed analog signal is then converted into a digital signal. The microcontroller receives this digital signal and analyzes it using a specific algorithm to determine whether it is a valid touch operation. Once a valid touch is confirmed, the microcontroller sends a command to the driver power module 1702, triggering the corresponding light-emitting layer 12 to illuminate.

[0081] The driving power supply module 1702 typically consists of a DC-AC converter, a voltage regulator, a current regulator, a multi-channel output control unit, and a signal receiving and processing unit. Operating Principle: The DC-AC converter converts DC power into AC power, providing the required AC power to the light-emitting layer 12. The voltage regulator and current regulator adjust the output voltage and current according to the requirements of the light-emitting layer 12, ensuring that the light-emitting layer 12 operates at the appropriate voltage and current to prevent damage to the light-emitting layer 12 due to overvoltage or overcurrent. The multi-channel output control unit supports multiple AC outputs and can selectively power different light-emitting layers 12 according to instructions from the touch detection module 1701. The signal receiving and processing unit receives instructions from the touch detection module 1701 and controls the power output accordingly to achieve light control for different light-emitting layers 12. When power is applied to the metal conductive layer 10 and the first transparent conductive layer 1301, the first light-emitting layer 1201 emits light of a specific color. When power is applied to the first transparent conductive layer 1301 and the second transparent conductive layer 1302, the second light-emitting layer 1202 emits light of a different color. When power is applied to the metal conductive layer 10 and the second transparent conductive layer 1302, the first light-emitting layer 1201 and the second light-emitting layer 1202 simultaneously emit light, mixing to produce a different color. The driver power module 1702 can output multiple AC power channels with adjustable specifications, typically ranging from 40V to 120V and 400Hz to 2000Hz.

[0082] Based on the above embodiments, in order to realize the zoned lighting and zoned touch functions, the embodiments of the present application also include: using a self-feedback laser etching process to divide the conductive layer 18 into multiple conductive areas 1801, and using a self-feedback laser etching process to divide the transparent touch layer 15 into multiple transparent touch areas; wherein, the conductive layer 18 includes a metal conductive layer 10 and a transparent conductive layer 13.

[0083] Furthermore, using a self-feedback laser etching process to divide the conductive layer 18 into multiple conductive regions 1801 includes: connecting each conductive region 1801 in the conductive layer 18 to a pin 20 (a conductive pin used to connect each conductive region 1801 to a capacitance detection module 21); using a laser 19 to continuously scan the current conductive region multiple times at a preset power and a preset speed; when the capacitance value of the pin 20 corresponding to the current conductive region detected by the capacitance detection module 21 suddenly changes to a set capacitance value, controlling the laser 19 to stop etching the current conductive region; applying the next conductive region to the current conductive region, and then continuously scanning the current conductive region multiple times using the laser 19 at a preset power and a preset speed until all conductive regions 1801 in the conductive layer 18 are etched. Using a self-feedback laser etching process to divide the transparent touch layer 15 into multiple transparent touch regions can refer to the method for dividing the conductive layer 18 into multiple conductive regions 1801 using a self-feedback laser etching process.

[0084] Through the aforementioned self-feedback laser etching process, the metal conductive layer 10 includes multiple metal conductive regions, the transparent conductive layer 13 includes multiple transparent conductive regions, and the transparent touch layer 15 includes multiple transparent touch regions. It should be noted that the transparent touch regions correspond one-to-one with the transparent conductive regions, and the transparent conductive regions correspond one-to-one with the metal conductive regions. The touch detection module 1701 is connected to each transparent touch region, and the driving power module 1702 is connected to each metal conductive region and each transparent conductive region. When a finger touches a transparent touch region, the touch detection module 1701 detects a change in the capacitance signal of the transparent touch region and sends this signal to the driving power module 1702. After receiving the signal from the touch detection module 1701, the driving power module 1702 controls the current flow between the metal conductive region and the transparent conductive region corresponding to the transparent touch region according to a preset logic, thereby causing the target region between the metal conductive region and the transparent conductive region in the reflective layer to emit light, while the region outside the target region does not emit light. This design realizes the zoned control of touch and lighting functions, allowing the trim panel to illuminate in specific areas according to the user's touch operations, enhancing the user interaction experience.

[0085] Figure 9 A schematic diagram of a conductive layer provided in an embodiment of the present application, Figure 10 A schematic diagram of a conductive layer including multiple conductive regions provided in an embodiment of the present application is shown in FIG. Figure 10 As shown, the self-feedback laser etching process is used to Figure 9 The conductive layer 18 in the embodiment is divided into three conductive areas 1801. Figure 11 A schematic diagram of over-etching and under-etching of the conductive layer 18 provided in an embodiment of the present application is shown in FIG. Figure 11As shown, during the laser etching process, especially for 3D shaped products, it is easy to cause insufficient or excessive etching in the thickness direction of the coating, resulting in functional damage. To prevent insufficient or excessive etching, the embodiment of the present application provides a self-feedback laser etching process. Figure 12 This is a schematic diagram of the connection between a conductive layer, a pin needle, and a capacitance detection module provided in an embodiment of the present application. Figure 13 This is a schematic diagram of another connection between a conductive layer, a pin needle, and a capacitance detection module provided in an embodiment of the present application; Figure 12 As shown, one end of each pin needle 20 is connected to a position corresponding to a conductive area 1801 to be etched, and the other end of the pin needle 20 is connected to the capacitance detection module 21. Figure 13 A conductive area 1801 is etched. The laser 19 is connected to the capacitance detection module 21. The laser 19 is used to continuously scan the current conductive area multiple times at a preset power and preset speed. When the capacitance value of the pin 20 corresponding to the current conductive area detected by the capacitance detection module 21 suddenly changes to a set capacitance value, the laser 19 is controlled to stop etching the current conductive area. Figure 14 A schematic diagram of a capacitance change provided in an embodiment of the present application is shown in FIG. Figure 14 As shown, when the current conductive area does not form a disconnected state with other areas, the capacitance value C1 at time t1 remains unchanged; when the current conductive area just forms a disconnected state with other areas, the capacitance value C1 at time t2 will suddenly change to C2, and at this time the capacitance detection module 21 will send an instruction to the laser 19 to stop etching the current conductive area.

[0086] To better understand the preparation method of the 3D touch luminous panel in the application, the following is a further introduction using the car charging port cover as an example. Figure 15 A schematic diagram of a car charging port cover provided in an embodiment of the present application;

[0087] Figure 16 This is an exploded view of a car charging port cover provided in an embodiment of the present application, as shown in FIG. Figure 15 and Figure 16 As shown, the surface of the car charging port cover is a 3D curved surface, divided into five luminous areas. The lower half of the part is the touch area 9 corresponding to each luminous area. When a finger touches or approaches the touch area 9, the luminous area at the corresponding position will light up. The preparation process of the car charging port cover is as follows:

[0088] (1) The first layer 22 is a carrier 1, which is a 3D plastic part made of PVC and is polished.

[0089] (2) The second layer 23 is a primer layer made of acrylic acid, which is sprayed and dried with a dry film thickness of 30 μm-40 μm.

[0090] (3) The third layer 24 is a metal conductive layer 10, made of copper paint with a dry film thickness of 15 μm-25 μm. The surface resistance of the copper paint is ≤5 Ω / □ (Ω / □ is the unit of square resistance, called "ohm per square"). The self-feedback laser etching process is used for scanning etching. The laser type is a 10W / 355nm ultraviolet galvanometer laser. The etching parameters are: speed 1500 mm / s, frequency 20 kHz, power 70%, and the number of scans is ten times (the capacitance detection module 21 will issue a stop command before scanning ten times).

[0091] (4) The fourth layer 25 is a dielectric layer 11 and a luminescent layer 12. The dielectric layer 11 is first sprayed and dried, with a dry film thickness of 25 μm-35 μm; then the luminescent layer 12 is sprayed, with a dry film thickness of 25 μm-35 μm.

[0092] (5) The fifth layer 26 is the transparent conductive layer 13, made of PEDOT with a dry film thickness of 100 nm to 200 nm. The surface resistance is ≤ 400 Ω / □. The surface is etched using a self-feedback laser etching process. The laser type is a 10W / 355nm UV galvanometer laser. The etching parameters are: speed 2000 mm / s, frequency 25 kHz, power 30%, and the number of scans is seven (the capacitance detection module 21 will issue a stop command before the seventh scan).

[0093] (6) The sixth layer 27 is the first transparent insulating layer 14 , and has a dry film thickness of 40 μm to 60 μm.

[0094] (7) The seventh layer 28 is a transparent touch-sensitive layer made of PEDOT with a dry film thickness of 100 nm to 200 nm and a surface resistance of ≤400 Ω / □. The layer is etched using a self-feedback laser etching process. The laser type is a 10W / 355nm UV galvanometer laser. The etching parameters are: speed 2000 mm / s, frequency 25 kHz, power 30%, and the number of scans is seven (the capacitance detection module 21 will issue a stop command before scanning seven times).

[0095] (8) The eighth layer 29 is the second transparent insulating layer 16 and the color paint layer 2. The second transparent insulating layer 16 is sprayed first and dried, with a dry film thickness of 40-60 μm; then the color paint layer 2 is sprayed, with a dry film thickness of 40-60 μm.

[0096] Finally, an embodiment of the present application also provides a motor vehicle, comprising the above-mentioned 3D touch luminous panel. The 3D touch luminous panel in the present application places the luminous and touch functional layers in the coating on the surface of the carrier 1. The structure is light and thin, with a total thickness of less than 0.5 cm. Compared with the existing touch luminous panels, it truly realizes "smart skin" and greatly reduces the product weight and design and assembly difficulty; the light source used by the 3D touch luminous panel is a surface light source, which can achieve uniform light emission even on complex 3D surfaces; the 3D touch luminous panel does not require a light guide plate 3, 7 capacitor films and a large number of LED lamp beads 4, and has obvious cost advantages; the 3D touch luminous panel is aimed at etching the conductive layer 18 of the 3D multi-layer structure, and has developed a self-feedback laser etching process, which greatly improves the accuracy of laser etching of the conductive layer 18 in the thickness direction; the 3D touch luminous panel provides designers with greater design freedom and can realize more complex smart surface products; the transparent touch layer 15 of the 3D touch luminous panel is very close to the operating surface (color paint layer 2), has high touch sensitivity, and can realize air operation; and the 3D touch luminous panel in the present application includes a multi-layer luminous layer 12 to achieve multi-color light.

[0097] This application provides a 3D touch-sensitive luminous panel. Through a spray painting and self-feedback laser etching process, various specially designed functional coatings are superimposed on the surface of a 3D carrier, giving the 3D carrier a thin smart skin and enabling both touch and luminous functions. The 3D touch-sensitive luminous panel can be used in smart surface products for automotive interior and exterior parts, as well as in consumer electronics, architecture, advertising, and other fields.

[0098] The above is a detailed introduction to the 3D touch luminous decorative panel, its preparation method and the motor vehicle provided by the present application. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of this application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of this application.

[0099] It should also be noted that, in this specification, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

Claims

1. A method for preparing a 3D touch luminous decorative plate, characterized in that: include: Grinding and polishing the surface of the carrier; Spraying a metal conductive layer on the surface of the carrier after grinding and polishing and drying; Spraying a luminescent layer on the surface of the dried metal conductive layer and drying the layer; Spraying a transparent conductive layer on the surface of the dried light-emitting layer and drying it; spraying a first transparent insulating layer on the surface of the dried transparent conductive layer and drying the layer; spraying a transparent touch layer on the surface of the dried first transparent insulating layer and drying the layer; A color paint layer is sprayed on the dried transparent touch layer surface and dried.

2. The method for preparing a 3D touch luminous decorative plate according to claim 1, characterized in that: Also includes: The conductive layer is divided into a plurality of conductive areas by a self-feedback laser etching process, and the transparent touch layer is divided into a plurality of transparent touch areas by a self-feedback laser etching process; wherein the conductive layer includes a metal conductive layer and a transparent conductive layer.

3. The method for preparing a 3D touch luminous decorative plate according to claim 2, characterized in that: The conductive layer is divided into multiple conductive areas using a self-feedback laser etching process, including: Connecting each conductive area in the conductive layer to a pin; Use the laser to scan the current conductive area multiple times in succession at a preset power and a preset speed; When the capacitance value of the pin corresponding to the current conductive area detected by the capacitance detection module suddenly changes to a set capacitance value, the laser is controlled to stop etching the current conductive area; The next conductive region is applied to the current conductive region, and the step of using the laser to continuously scan the current conductive region multiple times at a preset power and a preset speed is entered until etching of all conductive regions in the conductive layer is completed.

4. A 3D touch luminous decorative panel, characterized in that: The 3D touch luminous plaque is prepared by the preparation method of the 3D touch luminous plaque according to claim 1, comprising: a carrier, a metal conductive layer, a luminous layer, a transparent conductive layer, a first transparent insulating layer, a transparent touch layer, a color paint layer and a printed circuit board assembly; The metal conductive layer is provided on the surface of the carrier by a spraying process, the light-emitting layer is provided on the surface of the metal conductive layer by a spraying process, the transparent conductive layer is provided on the surface of the light-emitting layer by a spraying process, the first transparent insulating layer is provided on the surface of the transparent conductive layer by a spraying process, the transparent touch layer is provided on the surface of the first transparent insulating layer by a spraying process, and the colored paint layer is provided on the surface of the transparent touch layer by a spraying process. The printed circuit board assembly includes a printed circuit board and a touch detection module and a driving power module assembled on the printed circuit board, the touch detection module is connected to the transparent touch layer, and the driving power module is respectively connected to the transparent conductive layer and the metal conductive layer.

5. The 3D touch luminous decorative plate according to claim 4, characterized in that: It also includes a dielectric layer, which is sprayed between the metal conductive layer and the light-emitting layer through a spraying process.

6. The 3D touch luminous decorative plate according to claim 5, characterized in that: It also includes a second transparent insulating layer, which is sprayed between the transparent touch layer and the color paint layer through a spraying process.

7. The 3D touch luminous decorative plate according to any one of claims 4 to 6, characterized in that: The light-emitting layer includes multiple layers, the number of the transparent conductive layers is the same as that of the light-emitting layers, the light-emitting layers and the transparent conductive layers are alternately arranged, and each light-emitting layer uses electroluminescent powder that emits light of different colors.

8. The 3D touch luminous decorative plate according to any one of claims 4 to 6, characterized in that: The metal conductive layer includes multiple metal conductive areas, the transparent conductive layer includes multiple transparent conductive areas, and the transparent touch layer includes multiple transparent touch areas. The transparent touch areas are arranged in a one-to-one correspondence with the transparent conductive areas, and the transparent conductive areas are arranged in a one-to-one correspondence with the metal conductive areas. The touch detection module is respectively connected to each of the transparent touch areas, and the driving power supply module is respectively connected to each of the metal conductive areas and each of the transparent conductive areas.

9. The 3D touch luminous decorative plate according to any one of claims 4 to 6, characterized in that: The invention also includes a primer layer, which is sprayed between the carrier and the metal conductive layer through a spraying process.

10. A motor vehicle, characterized in that: Including the 3D touch luminous decorative panel according to any one of claims 4 to 9.

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