Ultra-thin automobile light-emitting ornament based on wireless charging and preparation method and control method of ultra-thin automobile light-emitting ornament
By using side-mounted Mini LED light strips and wireless charging technology, combined with dotted PC film and light-diffusing layer, the problems of traditional luminous body light components being heavy and having complex wiring have been solved, achieving an ultra-thin, flexible, and uniformly luminous modular design that meets the requirements of vehicle lightweighting and modularization.
Patent Information
- Application Number
- CN202511856523.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-10
- Publication Date
- 2026-02-17
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Traditional illuminated vehicle body lights are bulky, have complex wiring, poor adaptability to irregular shapes, and are difficult to achieve uniform surface light on curved or non-planar surfaces. They also rely on wired power supply, which cannot meet the requirements of modern vehicle lightweighting and modularization.
It adopts a side-mounted Mini LED light strip with a dotted PC film, combined with wireless charging technology, and forms an ultra-thin, flexible, and modular light-emitting component through in-mold injection molding. It uses wireless power supply to replace traditional wire harnesses, and combines a light-diffusing layer and a reflective sheet to improve the optical light-emitting effect.
It achieves thin, flexible, and uniform light emission, eliminates the dependence on wiring harnesses, meets the requirements of vehicle lightweighting and modularization, reduces wiring harness complexity and assembly costs, and has automotive-grade control and protection functions.
Smart Images
Figure CN121539765A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of automotive body decoration and vehicle lighting technology, specifically relating to a wirelessly powered automotive luminous decorative component, its manufacturing method, and its working control system. Background Technology
[0002] Traditional illuminated vehicle body lights typically employ wired power supply and rely on rigid light guide plates or rigid PCB light strips. This results in a bulky structure, complex wiring, poor adaptability to irregular shapes, high assembly time and wiring harness costs, and difficulty in achieving uniform surface light on curved or non-planar surfaces. While side-lit Mini-LEDs combined with PC film light guides can achieve thin, flexible optical surfaces, they still generally rely on wired power supply and are affected by wiring and waterproofing / vibration resistance. To meet the requirements of modern vehicle lightweighting and modularization, a D-pillar lighting solution is needed that can achieve thin, flexible, uniform light emission while eliminating reliance on traditional wiring harnesses. Summary of the Invention
[0003] To address the aforementioned technical problems, the present invention aims to provide an ultra-thin automotive luminous trim based on wireless charging. This automotive luminous trim uses a side-mounted Mini LED light strip paired with a PC film with a dotted surface, which can achieve the requirements of thinness and flexible optical light-emitting surface. At the same time, it eliminates the reliance on traditional wiring harnesses, realizes modular wireless power supply, and meets the requirements of modern vehicle lightweighting and modularization.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] An ultra-thin automotive luminous trim based on wireless charging includes a flexible light guide plate, a side-lit Mini-LED light strip, a light-diffusing layer, a reflective sheet, an automotive luminous trim body, and a receiving coil. The flexible light guide plate has dots printed on its lower surface or formed using laser dotting. These dots disrupt total internal reflection of light within the flexible light guide plate. A reflective sheet is disposed beneath the flexible light guide plate to improve light utilization and brightness uniformity, reducing light source loss. The side-lit Mini-LED light strip is mounted on the side edge of the flexible light guide plate.
[0006] The light-diffusing layer is located on the outside of the flexible light guide plate and is formed by stacking at least two high-temperature optical films;
[0007] The automotive luminous trim body includes an outer upper shell, a back plate, and a lower shell. The flexible light guide plate, light-diffusing layer, and reflector are disposed within the automotive luminous trim body and assembled with the automotive luminous trim body as a modular unit.
[0008] The receiving coil is placed on the back plate of the automotive luminous trim body. Through the lower housing, it is magnetically coupled with the vehicle's transmitting coil via a resonant network to achieve wireless power transmission, thereby powering the side-mounted Mini-LED light strip.
[0009] As a preferred embodiment of the present invention, the upper surface of the backplate is provided with a shielding copper foil and a ferrite magnetic conductive layer from top to bottom, and the receiving coil is located on the lower surface of the backplate, in close contact with the ferrite magnetic conductive layer.
[0010] As a preferred embodiment of the present invention, the ultra-thin automotive luminous trim also includes a temperature sensor and a control unit. The temperature sensor is used to detect the surface or back panel temperature of the ultra-thin automotive luminous trim and send the monitoring signal to the control unit. The control unit communicates with the vehicle body CAN / LIN, and the MCU built into the control unit is used for power management according to vehicle body commands or internal logic.
[0011] As a preferred embodiment of the present invention, the flexible light guide plate, the light uniform layer and the reflector are integrated and packaged by in-mold injection molding or in-mold bonding process, and are integrated with the automotive light-emitting trim body as a modular unit, with the overall thickness of the modular unit controlled within the range of 5–8 mm.
[0012] As a preferred embodiment of the present invention, the flexible light guide plate is a polycarbonate film with a thickness of 0.4–0.8 mm, a dot diameter of 0.05–0.30 mm, a dot spacing of 0.5–3.0 mm, and is arranged from sparse to dense and from large to small from the side closer to the side of the side-lit Mini-LED light strip.
[0013] As a preferred embodiment of the present invention, the side-lit Mini LED light strip includes a flexible substrate, a Mini LED blue light chip, an optical encapsulation layer, and a light-diffusing decorative layer; wherein, the Mini LED blue light chip is mounted on the flexible substrate by flip-chip method or the Mini LED blue light chip is attached to the surface of the flexible substrate, and the Mini LED blue light chip is encapsulated within the optical encapsulation layer; the optical encapsulation layer includes a transparent resin matrix, and the transparent resin matrix contains uniformly mixed multicolor phosphors; a light-diffusing decorative layer is provided on the surface of the optical encapsulation layer, the light-diffusing decorative layer being used to make the light distribution more uniform.
[0014] As a preferred embodiment of the present invention, the light-diffusing layer is composed of four films, which are, from top to bottom, an upper diffusion film, an upper brightness enhancement film, a lower brightness enhancement film, and a lower diffusion film, with a total thickness of 0.5–1.0 mm.
[0015] As a preferred embodiment of the present invention, the receiving coil is a wireless energy receiving coil. The receiving coil generates an induced alternating current of the same frequency in an alternating magnetic field, which is then output after resonant matching, rectification, filtering and constant current / constant voltage LED driving circuit to power the Mini LED blue light chip.
[0016] As a further preferred embodiment of the present invention, the transparent resin matrix is made of silicone or epoxy resin, and the multicolor phosphor is a two-color phosphor system composed of yellow phosphor and red phosphor. The total mass of the multicolor phosphor accounts for 14-18 wt% of the total mass of the optical sealing layer, of which yellow phosphor accounts for 70-80 wt% of the total mass of the multicolor phosphor, and the remainder is red phosphor.
[0017] This invention also provides a method for manufacturing an ultra-thin automotive luminous trim, the method comprising the following steps:
[0018] Step 1. Preparation of side-lit Mini-LED light strip: Print conductive silver paste lines and contacts on the back of the FPC substrate, attach or solder the MiniLED blue light chip and surface mount electronic components to the designated contacts, then perform electrical testing and dispensing to encapsulate the MiniLED blue light chip in the optical encapsulation layer, and then drip evenly the light adhesive to form a uniform light decorative layer on the surface of the optical encapsulation layer.
[0019] Step 2. Install the side-lit Mini-LED light strip on the side of the flexible light guide plate:
[0020] Step 3. Inject the outer shell into the inner mold of the injection mold, attach the light uniform layer inside the mold, and put the flexible light guide plate, reflector, shielding copper foil, ferrite magnetic layer, back plate, receiving coil and temperature sensor into the mold and encapsulate them into the upper assembly in one injection molding process.
[0021] Step 4. Inject the upper assembly and lower housing of Step 3 together to form an ultra-thin automotive luminous trim.
[0022] The present invention also provides a method for controlling ultra-thin automotive luminous trim parts, the method comprising the following steps:
[0023] Step 1. The receiving coil inside the ultra-thin automotive luminous trim based on wireless charging is magnetically coupled to the vehicle's transmitting coil for wireless power transmission through a resonant network;
[0024] Step 2. The receiving coil generates an induced alternating current of the same frequency in the alternating magnetic field. After passing through resonant matching, rectification, filtering and constant current / constant voltage LED driving circuit, the output is used to power the Mini LED blue light chip.
[0025] Step 3. The MCU manages power supply according to vehicle body instructions or internal logic, including power management, PWM dimming, protection actions and fault reporting. When the temperature sensor detects that the surface or back panel temperature of the ultra-thin automotive luminous trim exceeds the set threshold, the MCU triggers power reduction or lights off and alarms.
[0026] Advantages and beneficial effects of the present invention:
[0027] (1) The present invention achieves an ultra-thin, flexible, and uniformly luminous D-pillar visual effect. At the same time, it eliminates complicated wiring harnesses through wireless power supply, which facilitates modular assembly and matching with the whole vehicle, and meets the requirements of modern vehicle lightweighting and modularization.
[0028] (2) The present invention provides wireless power supply and modular installation, which has advantages such as disassembly and maintenance, and meets automotive safety, thermal management and EMC requirements.
[0029] (3) In this invention, yellow phosphor and red phosphor are added to the optical encapsulation layer. Under the excitation of the Mini LED blue light chip (blue light chip) with a peak wavelength of approximately 450nm, the yellow phosphor emits yellow light and the red phosphor emits red light. The yellow light, red light, and incompletely converted blue light are mixed by the dot scattering of the PC flexible light guide plate and the superposition of four layers of uniform light film to form uniform white light emission with a correlated color temperature of approximately 6000K and a high color rendering index. By limiting the mass percentage and color ratio of the phosphor, high optical conversion efficiency and reduced energy loss can be ensured while also taking into account the dispensing flowability and encapsulation reliability, thus meeting the consistency requirements of the ultra-thin light-emitting D-pillar of this invention for the cool white light appearance and automotive applications.
[0030] (4) This invention combines side-lit LEDs with a printed dot PC flexible light guide plate, four layers of uniform light film and wireless power supply to achieve thin (5-8mm), flexible adaptable curved surface (light-emitting D-pillar that can be formed with the curved surface of the car body), uniform surface light (uniform surface light source effect without obvious bright spots), modular wireless power supply, and meets automotive-grade control and protection requirements, significantly reducing wiring harness complexity and assembly costs.
[0031] (5) The wireless power supply of this invention can reduce the complexity of wiring harnesses and assembly, realize modular replacement and aftermarket installation; it is easy to mass-produce through the in-mold injection molding process, and can be integrated with other bumpers / interior parts such as D-pillars. Attached Figure Description
[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:
[0033] Figure 1 This is an exploded view of the ultra-thin automotive luminous trim component (luminous D-pillar module) of the present invention;
[0034] Figure 2 This is a schematic cross-sectional view of the light-emitting D-pillar of the present invention (optical layer stack);
[0035] Figure 3This is a schematic diagram of the dot distribution under the flexible light guide plate of the present invention;
[0036] Figure 4 This is a schematic diagram of the wireless power supply of the present invention. Detailed Implementation
[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0038] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0039] Example 1:
[0040] like Figures 1 to 4 As shown, this embodiment provides an ultra-thin automotive lighting trim based on wireless charging, including a flexible light guide plate 1, a side-lit Mini-LED light strip 2, a light-diffusing layer 3, a reflective sheet 4, an automotive lighting trim body, and a receiving coil 8. The lower surface of the flexible light guide plate 1 is printed with dots or formed using laser dotting (scattering dot matrix). These dots disrupt total internal reflection within the flexible light guide plate, altering the light propagation path and resulting in uniform light distribution, ultimately forming a uniform surface light source. A reflective sheet 4 is disposed below the flexible light guide plate 1 to improve light utilization and brightness uniformity, reducing light source loss. The side-lit Mini-LED light strip 2 is mounted on the side edge of the flexible light guide plate (arranged along one side of the flexible light guide plate) via an FPC or microwave single-mode resonant cavity.
[0041] The light-diffusing layer 3 is located on the outside of the flexible light guide plate 1 and is formed by stacking at least two high-temperature optical films;
[0042] The automotive luminous trim body includes an outer upper shell 5 (PC / PMMA, 4.5mm thick), a back plate 6, and a lower shell 7. The flexible light guide plate 1, the light uniform layer 3, and the reflector 4 are disposed in the automotive luminous trim body and assembled with the automotive luminous trim body as a modular unit.
[0043] The receiving coil 8 is placed on the back plate 6 of the automotive luminous trim body. Through the lower housing 7, it is magnetically coupled with the vehicle transmitting coil 11 via a resonant network to achieve wireless power transmission, thereby powering the side-mounted Mini-LED light strip.
[0044] Furthermore, in this embodiment, the upper surface of the back plate 6 is provided with a shielding copper foil and a ferrite magnetic conductive layer 9 from top to bottom, and the receiving coil 8 is located on the lower surface of the back plate 6, in close contact with the ferrite magnetic conductive layer 9. This method can reduce magnetic field leakage and meet the vehicle EMC specifications.
[0045] Furthermore, in this embodiment, the ultra-thin automotive luminous trim also includes a temperature sensor 10 and a control unit. The temperature sensor 10 is used to detect the surface or back panel temperature of the ultra-thin automotive luminous trim and send the monitoring signal to the control unit. The control unit communicates with the vehicle's CAN / LIN. The MCU (microcontroller) built into the control unit is used to perform power management according to vehicle commands or internal logic, including power management, PWM dimming, protection actions, and fault reporting. Specifically, when the temperature sensor detects that the surface or back panel temperature of the ultra-thin automotive luminous trim exceeds a set threshold, the MCU triggers power reduction or light shutdown and alarm.
[0046] Furthermore, in this embodiment, the flexible light guide plate 1, the light uniform layer 3, and the reflector 4 are integrated and packaged through in-mold injection molding (IME) or in-mold bonding processes, and are integrated with the automotive light-emitting trim body as a modular unit. The overall thickness of the modular unit is controlled within the range of 5–8 mm.
[0047] Furthermore, in this embodiment, the flexible light guide plate 1 is a polycarbonate (PC) film with a thickness of 0.4–0.8 mm, a dot diameter of 0.05–0.30 mm, and a dot spacing of 0.5–3.0 mm. The dots are arranged from sparse to dense and from large to small from the side closest to the side-lit Mini-LED light strip to the other side. Specifically, the dot diameter at the near-light edge is 0.30 mm and the dot spacing is 2.0 mm; the dot diameter in the middle area is 0.15 mm and the dot spacing is 1.0 mm; and the dot diameter on the light-emitting side is 0.05 mm and the dot spacing is 0.5 mm.
[0048] Furthermore, in this embodiment, the side-lit Mini LED light strip 2 includes a flexible substrate, a Mini LED blue light chip, an optical encapsulation layer, and a light-diffusing decorative layer; wherein, the flexible substrate is an FPC substrate with a thickness of 0.15mm, the Mini-LED blue light chip is mounted on the flexible substrate by flip-chip method or the Mini-LED blue light chip is attached to the surface of the flexible substrate, and the Mini LED blue light chip is encapsulated inside by the optical encapsulation layer; the optical encapsulation layer includes a transparent resin matrix, in which uniformly mixed multicolor phosphors are disposed, and the thickness of the optical encapsulation layer is 0.25mm; a light-diffusing decorative layer is disposed on the surface of the optical encapsulation layer, the light-diffusing decorative layer is used to make the light distribution more uniform, and the thickness of the light-diffusing decorative layer is 0.1mm.
[0049] In this embodiment, the transparent resin matrix uses organosilicon or epoxy resin as the matrix, and the multicolor phosphor is a two-color phosphor system composed of yellow phosphor and red phosphor. The total mass of the multicolor phosphor accounts for 14-18 wt% of the total mass of the optical sealing layer, preferably about 16 wt%; wherein the yellow phosphor accounts for 70-80 wt% of the total mass of the multicolor phosphor, preferably about 75 wt%, and the remainder is red phosphor.
[0050] Furthermore, in this embodiment, the light-diffusing layer is composed of four films, which are, from top to bottom, an upper diffusion film, an upper brightness enhancement film, a lower brightness enhancement film, and a lower diffusion film, with a total thickness of 0.5–1.0 mm. The light-diffusing film is used to perform light-diffusing treatment, so that the light is diffused evenly, thereby improving brightness uniformity, improving color stability, and reducing luminance.
[0051] It should be noted that in this embodiment, the upper diffusion film, upper brightness enhancement film, lower brightness enhancement film, and lower diffusion film are high-temperature optical films. For the selection of specific high-temperature optical films, those skilled in the art can refer to the prior art.
[0052] Furthermore, in this embodiment, the receiving coil 8 is a wireless power receiving coil, including an FPC disc coil (flexible printed circuit coil) or a multi-turn Litz coil. The outer diameter of the receiving coil is 30–80 mm, and the number of turns of the multi-turn Litz coil is 6–14. The receiving coil generates induced alternating current of the same frequency in an alternating magnetic field, which is then output after resonant matching, rectification, filtering and constant current / constant voltage LED driving circuit to power the Mini LED blue light chip.
[0053] It should be noted that the resonant matching, rectification, filtering and constant current / constant voltage LED driving circuits in this embodiment can be designed with reference to existing technology. The circuit itself is not an improvement point of this application, so it will not be described in detail.
[0054] In this embodiment, the ultra-thin automotive luminous trim can be a luminous D-pillar or other luminous trim on the car, and the whole vehicle transmitting coil is set in the B-pillar or in the mounting groove of the car body.
[0055] Example 2:
[0056] This embodiment provides a method for manufacturing an ultra-thin automotive illuminated trim part, which includes the following steps:
[0057] Step 1. Preparation of side-lit Mini-LED light strip: Print conductive silver paste lines and contacts on the back of the FPC substrate, attach or solder the MiniLED blue light chip and surface mount electronic components to the designated contacts, then perform electrical testing and dispensing to encapsulate the MiniLED blue light chip in the optical encapsulation layer, and then drip evenly the light adhesive to form a uniform light decorative layer on the surface of the optical encapsulation layer.
[0058] Step 2. Install the side-lit Mini-LED light strip on the side of the flexible light guide plate:
[0059] Step 3. Inject the outer shell into the inner mold of the injection mold, attach the light uniform layer inside the mold, and put the flexible light guide plate, reflector, shielding copper foil, ferrite magnetic layer, back plate, receiving coil and electronic module (sensor) into the mold and encapsulate them into the upper assembly in one injection molding process;
[0060] Step 4. Inject the upper assembly and lower housing of Step 3 into one piece to form an ultra-thin automotive luminous trim; finally, perform modular testing, including tests on wireless alignment efficiency, brightness distribution, temperature rise, and EMC (electromagnetic compatibility).
[0061] Example 3:
[0062] This embodiment provides a method for controlling ultra-thin automotive illuminated trim parts, the method including the following steps:
[0063] Step 1. The receiving coil inside the ultra-thin automotive luminous trim based on wireless charging is magnetically coupled to the vehicle's transmitting coil for wireless power transmission through a resonant network;
[0064] Step 2. The receiving coil generates an induced alternating current of the same frequency in the alternating magnetic field. After passing through resonant matching, rectification, filtering and constant current / constant voltage LED driving circuit, the output is used to power the Mini LED blue light chip.
[0065] Step 3. The MCU manages power supply according to vehicle body instructions or internal logic, including power management, PWM dimming, protection actions and fault reporting. When the temperature sensor detects that the surface or back panel temperature of the ultra-thin automotive luminous trim exceeds the set threshold, the MCU triggers power reduction or lights off and alarms.
[0066] The above describes specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.
Claims
1. A wireless charging based ultra-thin automotive lighted trim, characterized in that, The application relates to a super-thin automobile light-emitting ornament, which comprises a flexible light guide lamp plate, a side-in Mini-LED lamp strip, a light homogenizing layer, a reflecting sheet, an automobile light-emitting ornament body and a receiving coil. The lower surface of the flexible light guide lamp plate is printed with dots or the dots are formed by laser dotting, the dots break the total reflection of light in the flexible light guide lamp plate, the lower surface of the flexible light guide lamp plate is provided with a reflecting sheet, the reflecting sheet is used for improving the utilization rate and brightness uniformity of light and reducing the loss of a light source, and the side-in Mini-LED lamp strip is attached to the side edge of the flexible light guide lamp plate. The light homogenizing layer is located outside the flexible light guide lamp plate and is formed by at least two layers of high-temperature optical films. The automobile light-emitting ornament body comprises an outer decoration upper shell, a back plate and a lower shell, the flexible light guide lamp plate, the light homogenizing layer and the reflecting sheet are arranged in the automobile light-emitting ornament body and are assembled into a modular unit with the automobile light-emitting ornament body.
2. A wireless charging based ultra-thin automotive lighted trim according to claim 1, wherein, The receiving coil is arranged on the back plate of the automobile light-emitting ornament body and is magnetically coupled with a vehicle transmitting coil through a resonance network to realize wireless power transmission and supply power to the side-in Mini-LED lamp strip.
3. The ultra-thin car light ornament based on wireless charging according to claim 1 or 2, characterized in that, The upper surface of the back plate is sequentially provided with a shielding copper foil and a ferrite magnetic conducting layer from top to bottom, and the receiving coil is located on the lower surface of the back plate and closely contacts the ferrite magnetic conducting layer.
4. A wireless charging based ultra-thin automotive lighted trim according to any one of claims 1 to 3, wherein, The super-thin automobile light-emitting ornament further comprises a temperature sensor and a control unit, the temperature sensor is used for detecting the temperature of the surface or the back plate of the super-thin automobile light-emitting ornament and sending a monitoring signal to the control unit, the control unit communicates with the vehicle body CAN / LIN, and the MCU built in the control unit is used for power supply management according to the vehicle body instruction or internal logic.
5. A wireless charging based ultra-thin automotive lighted trim according to any one of claims 1 to 4, wherein, The flexible light guide lamp plate, the light homogenizing layer and the reflecting sheet are integrally packaged through an in-mold injection or in-mold bonding process and are integrally assembled into a modular unit with the automobile light-emitting ornament body, and the overall thickness of the modular unit is controlled within the range of 5-8 mm.
6. A wireless charging based ultra-thin automotive lighted trim according to any one of claims 1 to 5, wherein, The flexible light guide lamp plate is a polycarbonate film with a thickness of 0.4-0.8 mm, a dot diameter of 0.05-0.30 mm, a dot spacing of 0.5-3.0 mm and a density gradually increasing from one side to the other side of the side-in Mini-LED lamp strip.
7. A wireless charging based ultra-thin automotive lighted trim according to any one of claims 1 to 6, wherein, The side-in Mini-LED lamp strip comprises a flexible substrate, a Mini-LED blue light die, an optical encapsulation layer and a light homogenizing decoration layer. The Mini-LED blue light die is mounted on the flexible substrate in a flip-chip mode or is attached to the surface of the flexible substrate and is encapsulated in the Mini-LED blue light die through the optical encapsulation layer. The optical encapsulation layer comprises a transparent resin matrix, the transparent resin matrix is provided with uniformly mixed multi-color fluorescent powder, the surface of the optical encapsulation layer is provided with the light homogenizing decoration layer, and the light homogenizing decoration layer is used for making the light distribution more uniform. The light homogenizing layer is composed of four film pieces, namely an upper diffusion film, an upper brightness enhancement film, a lower brightness enhancement film and a lower diffusion film from top to bottom, and the total thickness is 0.5-1.0 mm. The receiving coil is a wireless energy receiving coil. The receiving coil generates an induced alternating current of the same frequency in an alternating magnetic field. After passing through resonant matching, rectification, filtering and constant current / constant voltage LED driving circuit, the output is used to power the Mini LED blue light chip.
8. A wireless charging based ultra-thin automotive lighted trim according to any one of claims 1 to 7, wherein, The transparent resin matrix uses organosilicon or epoxy resin as the matrix, and the multicolor phosphor is a two-color phosphor system composed of yellow phosphor and red phosphor. The total mass of the multicolor phosphor accounts for 14-18 wt% of the total mass of the optical sealing layer, of which yellow phosphor accounts for 70-80 wt% of the total mass of the multicolor phosphor, and the remainder is red phosphor.
9. The method of claim 1 to 8, wherein the method is characterized by, The method includes the following steps: Step 1. Preparation of side-lit Mini-LED light strip: Print conductive silver paste lines and contacts on the back of the FPC substrate, attach or solder the Mini LED blue light chip and surface mount electronic components to the designated contacts, then perform electrical testing and dispensing to encapsulate the Mini LED blue light chip in the optical encapsulation layer, and then drip evenly the light adhesive to form a uniform light decorative layer on the surface of the optical encapsulation layer. Step 2. Install the side-lit Mini-LED light strip on the side of the flexible light guide plate: Step 3. Inject the outer shell into the inner mold of the injection mold, attach the light uniform layer inside the mold, and put the flexible light guide plate, reflector, shielding copper foil, ferrite magnetic layer, back plate, receiving coil and temperature sensor into the mold and encapsulate them into the upper assembly in one injection molding process. Step 4. Inject the upper assembly and lower housing of Step 3 together to form an ultra-thin automotive luminous trim.
10. A control method of an ultra-thin automotive light-emitting trim according to any one of claims 1 to 8, characterized in that, The method includes the following steps: Step 1. The receiving coil inside the ultra-thin automotive luminous trim based on wireless charging is magnetically coupled to the vehicle's transmitting coil for wireless power transmission through a resonant network; Step 2. The receiving coil generates an induced alternating current of the same frequency in the alternating magnetic field. After passing through resonant matching, rectification, filtering and constant current / constant voltage LED driving circuit, the output is used to power the Mini LED blue light chip. Step 3. The MCU manages power supply according to vehicle body instructions or internal logic, including power management, PWM dimming, protection actions and fault reporting. When the temperature sensor detects that the surface or back panel temperature of the ultra-thin automotive luminous trim exceeds the set threshold, the MCU triggers power reduction or lights off and alarms.