Light and shadow overlapped automobile interior trim part and preparation method thereof

Abstract

The invention discloses a light and shadow overlapped automobile interior trim part and a preparation method thereof. The interior trim part comprises a transparent part body and a light-emitting structure. The light-emitting structure comprises a first PC membrane, a contour layer, a color layer, a diffusion sheet, a second PC membrane, a side-in type Mini LED light bar and a reflection sheet. A contour layer is arranged on the back face of the first PC membrane, a color layer is arranged on the back face of the contour layer, and the diffusion sheet is arranged between the color layer and the second PC membrane. The side surface of the second PC diaphragm is provided with a side-in Mini LED light bar, the lower surface is printed with dots or dots are formed by laser dotting, and the back surface is provided with a reflector plate; the side-in type Mini LED light bar comprises a flexible substrate, a Mini LED blue light wafer and an optical sealing glue layer. Wherein the optical sealing glue layer is used for packaging the Mini LED blue light wafer in the optical sealing glue layer, a red quantum dot crystal, a green quantum dot crystal and a diffusant are arranged in the optical sealing glue layer, and the Mini LED blue light wafer excites the red quantum dot crystal and the green quantum dot crystal to form white light. The interior trim part finally achieves about 110% NTSC color gamut coverage rate, and the color gamut performance is improved by more than 50% compared with a traditional scheme.

Description

Technical Field

[0001] The present invention belongs to the technical field of automotive interior parts, relates to light-emitting interior parts, and particularly relates to a light and shadow superimposed image automotive interior part and a preparation method thereof. Background Art

[0002] With the continuous upgrading of the styling aesthetics and light effect quality requirements of automotive interior and exterior lighting systems, the thin and light design of their optical components has become the core trend in the industry. Thanks to the maturity of the sub-millimeter light-emitting diode (Mini LED) technology, the ultra-thin optical solutions based on Mini LED backlight modules are accelerating penetration in the automotive field. The current mainstream traditional solutions have significant limitations. 1. Direct-lit LED layout: It relies on the mixing distance (OD value) to ensure uniformity. The reduction of OD will lead to the aggravation of the spot effect, and it is necessary to compensate through a high-density LED array, resulting in a significant increase in cost. At the same time, restricted by both the LED package thickness and the OD value, it is difficult for the overall thickness of the module to break through the 10 mm threshold; 2. Edge-lit LED layout: It uses a combination of 3014 packaged LEDs and a 2 mm rigid light guide plate. Although the system thickness can be compressed to 5-10 mm, due to its reliance on a rigid light guide structure, it cannot adapt to the flexible light distribution requirements of the curved surfaces of automotive interior and exterior parts. These two traditional technical routes are both difficult to meet the dual design requirements of "ultra-thin" and "flexible" for the new generation of in-vehicle lighting systems in terms of module thickness control and form adaptability. In addition, there are bottlenecks in the color rendering performance of traditional automotive interior white LED light sources. Based on the composite light-emitting mechanism of blue light chips and phosphors, due to the lack of energy in the red and green wavelength bands in the spectrum, the NTSC color gamut coverage rate is generally around 72%. This spectral defect directly causes two major application limitations: (1) Color reproduction distortion: Limited by the discontinuous emission spectrum, the color of the object surface in the lighting scene is prone to hue shift and saturation attenuation; (2) Insufficient color gamut coverage: Typical white LEDs can only cover about 70% of the NTSC color space, making it difficult to meet the high-fidelity color rendering requirements. Summary of the Invention

[0003] To solve the above technical problems, the purpose of the present invention is to provide a light and shadow superimposed image automotive interior part. This automotive interior part uses a Mini-LED blue light chip and a quantum dot encapsulation layer, and uses blue light to excite red and green quantum dot crystals in the encapsulation layer to form white light. Through the excitation of nanoscale quantum dot crystals, the color purity is higher and the color performance is better. The quantum confinement effect generated by the 10-12 nm particle size of the quantum dots improves the color purity, and finally achieves a NTSC color gamut coverage rate of about 110%. The color gamut performance of products using quantum dot technology is improved by more than 50% compared with traditional solutions.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A light and shadow superimposed automotive interior part, comprising a transparent part body and a light-emitting structure arranged inside the transparent part body; wherein, the light-emitting structure includes a first PC film, a contour layer, a color layer, a diffusion sheet, a second PC film, a side-entry type Mini LED light bar, and a reflector; wherein, a contour layer is provided on the back of the first PC film, a contour line for displaying a pattern is provided on the contour layer, a color layer is provided on the back of the contour layer, and the color and contour of the pattern are provided on the color layer. The light transmittance of the contour layer needs to satisfy that the color and contour of the color layer are projected in the opened state of the light-emitting structure, and the color and contour of the color layer are not projected in the unopened state; the diffusion sheet is arranged between the color layer and the second PC film for light homogenization processing; a side-entry type Mini LED light bar is provided on the side of the second PC film, and dots are printed on the lower surface of the second PC film or formed by laser dotting. By the dots, the total reflection of light in the second PC film is destroyed, the propagation path of light is changed, and the light is evenly distributed, finally forming a uniform surface light source; a reflector is arranged on the back of the second PC film, and the reflector is used to improve the light utilization rate and brightness uniformity and reduce the loss of the light source;

[0006] The side-entry type Mini LED light bar includes a flexible substrate, Mini LED blue light chips, and an optical encapsulation layer; wherein, the Mini LED blue light chips are installed on the flexible substrate in a flip-chip manner, and the optical encapsulation layer is used to encapsulate the Mini LED blue light chips therein. The optical encapsulation layer is provided with red quantum dot crystals, green quantum dot crystals, and a diffusing agent, and the Mini LED blue light chips excite the red quantum dot crystals and green quantum dot crystals to form white light.

[0007] As a preference of the present invention, the diffusion sheet is composed of four film sheets, which are an upper diffusion film, an upper brightness enhancement film, a lower brightness enhancement film, and a lower diffusion film from top to bottom. The overall thickness of the diffusion sheet is 0.8 mm. The light is homogenized and the overall brightness is increased through the optical film sheets, so that the light is evenly diffused; the thickness of the second PC film is 0.5 - 0.6 mm.

[0008] As a preference of the present invention, the flexible substrate is an FPC substrate, the thickness of the Mini LED blue light chips is 0.15 mm, the thickness of the FPC substrate is 0.15 mm, and the thickness of the optical encapsulation layer is 0.25 mm.

[0009] Preferably, for the present invention, the wavelength of the red quantum dot crystal is 625±2 nm, and the wavelength of the green quantum dot crystal is 525±2 nm. The diffusing agent is selected as an organosilicon diffusing agent. 10%-20% of the organosilicon diffusing agent, 0.1%-1% of the red quantum dot crystal and the green quantum dot crystal are added into the main material of the optical encapsulation layer. The ratio of the red quantum dot crystal to the green quantum dot crystal is 1:2. The organosilicon diffusing agent can scatter light, change the propagation direction of light, and make the light more evenly distributed.

[0010] Preferably, for the present invention, the red quantum dot crystal includes CdS, ZnS, CdSe, InP, InGaAs quantum dots, and the green quantum dot crystal includes CdS, ZnS, CdSe, InP, InGaAs quantum dots.

[0011] Preferably, for the present invention, the transparent part body adopts the form of a third PC film or a transparent plastic part covering the transparent skin.

[0012] Preferably, for the present invention, 15-20% of the organosilicon diffusing agent, 0.7-1% of the red quantum dot crystal and the green quantum dot crystal are added into the main material of the optical encapsulation layer. The ratio of the red quantum dot crystal to the green quantum dot crystal is 1:2.

[0013] The present invention also provides a preparation method of a light and shadow superimposed automotive interior part, and the method includes the following steps:

[0014] Step 1. Prepare a Mini LED light bar;

[0015] Step 1.1. Mount the Mini LED blue light chip on the flexible substrate by means of flip-chip;

[0016] Step 1.2. Prepare the material of the optical encapsulation layer:

[0017] Take the main material of the optical encapsulation layer, add 10%-20% of the organosilicon diffusing agent, 0.1%-1% of the red quantum dot crystal and the green quantum dot crystal into the main material. Among them, the ratio of the red quantum dot crystal to the green quantum dot crystal is 1:2. Mix the materials evenly, and use the evenly mixed materials to encapsulate the Mini LED blue light chip, so that an optical encapsulation layer is formed on the Mini LED blue light chip;

[0018] Step 2. Mount the Mini LED light bar on the side of the support frame. A reflector is arranged in the support frame. The reflector is fixed at the bottom of the support frame. The second PC film with dots on the lower surface is fixed on the front of the reflector through a high-transparency 3M adhesive, and the diffusion film is fixed on the front of the second PC film through a high-transparency 3M adhesive;

[0019] Step 3. Combine the first PC film, the contour layer, and the color layer to form an integral unit, and then install it on the top surface of the support frame, with the color layer closely attached to the diffusion sheet to form a light-emitting structure;

[0020] Step 4. Integrally mold the third PC film with the light-emitting structure to form an automotive interior part with overlapping light and shadow images.

[0021] Advantages and beneficial effects of the present invention:

[0022] (1) The light-emitting structure provided by the present invention uses a side-entry Mini LED light bar and a PC film with dots. The PC (polycarbonate) film is used instead of a rigid light guide plate. The overall thickness can be made within 5 mm. Moreover, since the PC film has a certain flexibility, the optical light-emitting surface can be designed to be flexible, and the overall structure can better adapt to the body curve, meeting the requirements of thinning and flexibility of the optical light-emitting surface. In addition, the PC film with dots can effectively control the light distribution through the dot arrangement from sparse to dense and from small to large, enabling good light mixing, higher light efficiency uniformity, and improved display effect uniformity and contrast.

[0023] (2) The side-entry Mini LED light bar provided by the present invention adopts a flip-chip structure (the electrodes are arranged at the bottom of the LED chip). This assembly method can reduce light shielding, improve light efficiency, and since no wire soldering is required, the arrangement density of the chips (blue light chips) can be increased, thereby achieving higher resolution and better display effect, and solving the problem of uneven light emission brightness. In addition, the flip-chip Mini LED blue light chip (LED chip) can directly conduct heat to the flexible substrate, so it has better heat dissipation performance, which can not only reduce energy consumption but also improve the service life of the LED.

[0024] (3) Red and green quantum dot crystals and a diffusing agent are added to the optical encapsulation layer of the present invention. The blue light chip excites the red and green quantum dot crystals to form white light. This design can improve the color gamut performance by more than 50%, with higher color reducibility. Moreover, the addition of the diffusing agent can effectively solve the problem of uneven light emission brightness, improving the uniformity and visual effect of the display screen.

[0025] (4) The overall pattern of the interior part of the present invention is artistically disassembled, and the light transmittance of the contour layer is controlled. The background color is not transmitted without backlight, and the background color is projected with backlight. This makes the provided automotive interior part present two effects before and after the power supply turns on the backlight, that is, it can present a high-quality surface effect with or without backlight. After the power supply turns on the backlight, the color layer and the front contour layer are superimposed into a complete picture, presenting the color effect of the painting with high fidelity.

[0026] (5) The light and shadow superimposed automotive interior parts provided by the present invention adopt the technical solution of side - inserted mini LED light strips combined with quantum dots, which can achieve thin - type (the overall thickness of the optical structure is ultra - thin, within 5 mm), flexible optical light - emitting surface (can adapt to special - shaped structures, and the overall structure can better fit the body curve), and high - color - gamut requirements (about 110% NTSC color - gamut coverage). BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings; in the drawings:

[0028] Figure 1 is an exploded schematic view of the optical structure of the present invention;

[0029] Figure 2 is a sectional view of the automotive interior part of the present invention;

[0030] Figure 3 is a schematic view of the optical structure of the present invention;

[0031] Figure 4 is a schematic view of the PC film with printed dots on the lower surface of the present invention;

[0032] Figure 5 is a schematic view of the PC film with dots formed by laser dotting on the lower surface of the present invention;

[0033] Figure 6 is a schematic view of the side - inserted Mini LED light strip of the present invention;

[0034] Figure 7 is a schematic view of the installation of the Mini LED blue - light chip of the present invention;

[0035] Reference numerals: the first PC film 1, the contour layer 2, the color layer 3, the diffusion sheet 4, the second PC film 5, the side - inserted MiniLED light strip 6, the reflector 7, the transparent plastic part 8, the transparent skin 9, the support frame 10, the upper diffusion film 41, the upper brightness - enhancement film 42, the lower brightness - enhancement film 43, the lower diffusion film 44, the dots 51, the flexible substrate 61, the Mini LED blue - light chip 62, the optical sealant layer 63. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0037] In the description of the present application, it should also be noted that, unless otherwise clearly defined and limited, the terms "set" and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0038] As Figures 1 to 7 shown, a light and shadow superimposed automotive interior part provided in this embodiment includes a transparent part body and a light-emitting structure arranged in the transparent part body; wherein, the light-emitting structure includes a first PC film 1, a contour layer 2, a color layer 3, a diffusion sheet 4, a second PC film 5, a side-entry Mini LED light bar 6, and a reflective sheet 7; wherein, a contour layer 2 is provided on the back of the first PC film 1, and a contour line for displaying a pattern is provided on the contour layer 2. A color layer 3 is provided on the back of the contour layer 2, and the color and contour of the pattern to be displayed are provided on the color layer 3. The light transmittance of the contour layer 2 needs to meet the requirement that the color and contour of the color layer 3 are projected in the opened state of the light-emitting structure, and the color and contour of the color layer 3 are not projected in the unopened state; the diffusion sheet 4 is arranged between the color layer 3 and the second PC film 5 for light homogenization processing; a side-entry Mini LED light bar 6 is provided on the side of the second PC film 5, and dots 51 are printed on the lower surface of the second PC film 5 or formed by laser dotting to form dots 51. The light enters from the side, conducts in the second PC film, and the total reflection of the light in the second PC film is destroyed by the dots 51, changing the propagation path of the light, so that the light is evenly distributed, and finally a uniform surface light source is formed; a reflective sheet 7 with a high reflectivity is provided on the back of the second PC film 5, and the reflective sheet 7 is used to improve the light utilization rate and brightness uniformity, reduce the loss of the light source, and optimize the visual effect;

[0039] The side - entry Mini LED light strip 6 includes a flexible substrate 61, Mini LED blue - light chips 62, and an optical encapsulation layer 63; among them, the Mini LED blue - light chips (also known as LED chips) 61 are installed on the flexible substrate 62 in a flip - chip manner, and the optical encapsulation layer 63 is used to encapsulate the Mini LED blue - light chips 62. The optical encapsulation layer 63 is provided with red quantum dot crystals, green quantum dot crystals, and a diffusing agent. The Mini LED blue - light chips 62 excite the red quantum dot crystals and green quantum dot crystals to form white light.

[0040] Further, in this embodiment, the overall thickness of the diffuser 4 is 0.8 mm. The diffuser 1 is composed of four film sheets, which are, from top to bottom, an upper diffusing film 41, an upper brightness - enhancing film 42, a lower brightness - enhancing film 43, and a lower diffusing film 44. Through the light - homogenizing treatment of the diffuser 4, the light is evenly diffused, improving the brightness uniformity and the visual effect.

[0041] It should be noted that, in this embodiment, the upper diffusing film 41, the upper brightness - enhancing film 42, the lower brightness - enhancing film 43, and the lower diffusing film 44 are high - temperature optical film sheets. Regarding the specific selection of high - temperature optical film sheets, those skilled in the art can refer to the prior art.

[0042] In this embodiment, the light - emitting structure is installed on the support frame 10.

[0043] Further, in this embodiment, the flexible substrate 61 is an FPC substrate with a thickness of 0.15 mm, the thickness of the Mini LED blue - light chips 62 is 0.15 mm, and the thickness of the optical encapsulation layer 63 is 0.25 mm.

[0044] Further, in this embodiment, the wavelength of the red quantum dot crystals is 625±2 nm, and the wavelength of the green quantum dot crystals is 525±2 nm. The diffusing agent is selected as an organosilicon diffusing agent. 10% - 20% of the organosilicon diffusing agent, 0.1% - 1% of the red quantum dot crystals and green quantum dot crystals are added into the main material of the optical encapsulation layer 63, and the ratio of the red quantum dot crystals to the green quantum dot crystals is 1:2. The organosilicon diffusing agent can scatter the light, change the propagation direction of the light, and make the light more evenly distributed, thus achieving the purposes of softening the light and reducing glare, etc. The red quantum dot crystals include CdS, ZnS, CdSe, InP, InGaAs quantum dots, and the green quantum dot crystals include CdS, ZnS, CdSe, InP, InGaAs quantum dots.

[0045] Further, in this embodiment, the transparent part body adopts the form of a third PC film sheet or a transparent plastic part 8 covering the transparent skin 9.

[0046] In this embodiment, the thickness of the second PC film 5 is 0.5 - 0.6 mm. The point light source emitted by the side - entry Mini LED light bar 6 forms a uniform surface light source after passing through the reflector 7 and the second PC film 5 with dots, and then is emitted after being subjected to light homogenization treatment by the diffusion film 4.

[0047] In this embodiment, the printing dots 51 are mainly made of thermally dry or UV inks (light - source substances with diffusion and reflection characteristics SiO 2 / TiO 2 ) as printing raw materials, which are coated on the reflective side of the second PC film to form dots, destroying total reflection, enabling the incident light to have scattering characteristics, forming a diffuse reflection effect, and uniformly emitting from the front surface (upper surface) of the second PC film.

[0048] The present invention also provides a preparation method for a light - shadow superimposed automotive interior part, and this method includes the following steps:

[0049] Step 1. Prepare the Mini LED light bar;

[0050] Step 1.1. Mount the Mini LED blue - light chip on the flexible substrate in a flip - chip manner;

[0051] Step 1.2. Prepare the material for the optical encapsulation layer:

[0052] Take the main material of the optical encapsulation layer, add 10% - 20% of silicone diffusing agent, 0.1% - 1% of red quantum dot crystals, and green quantum dot crystals into the main material; among them, the ratio of the red quantum dot crystals to the green quantum dot crystals is 1:2. Mix the materials evenly, and use the evenly - mixed materials to encapsulate the Mini LED blue - light chip, so that an optical encapsulation layer is formed on the Mini LED blue - light chip; the silicone diffusing agent plays a role in evenly distributing light, and the red quantum dot crystals and green quantum dot crystals play a role in improving the color gamut level;

[0053] Step 2. Mount the Mini LED light bar on the side of the support frame 10. A reflector is arranged inside the support frame, the reflector is fixed at the bottom of the support frame, and the second PC film with dots on its lower surface is fixed to the front of the reflector through high - transparency 3M adhesive, and the diffusion film is fixed to the front of the second PC film through high - transparency 3M adhesive;

[0054] Step 3. Combine the first PC film, the contour layer, and the color layer to form a whole and mount it on the top surface of the support frame, and make the color layer closely adhere to the diffusion film to form a light - emitting structure;

[0055] Step 4. Integrally form the third PC film with the light - emitting structure to form a light - shadow superimposed automotive interior part.

[0056] The light and shadow superimposed automotive interior parts provided in this embodiment will present two effects before and after the power supply turns on the backlight. The second effect will superimpose the color layer and the front contour layer into a complete picture, presenting the color effect of the painting with high fidelity.

[0057] Table 1 shows the light-emitting effects after adding different silicone diffusing agents and red and green quantum dot crystals (InP quantum dots). The results are as follows:

[0058] Table 1 Light-emitting effects after adding different diffusing agents and red and green quantum dot crystals

[0059] Serial number Dispersant (%) Red and green quantum dot crystals (%) Luminescence effect 1 10 0.1 There is lamp shadow and the color gamut level increases by 10% 2 15 0.4 There is slight lamp shadow and the color gamut level increases by 20% 3 15 0.7 There is no lamp shadow and the color gamut level increases by 35% 4 20 1.0 There is no lamp shadow and the color gamut level increases by 50%

[0060] It can be seen from the above results that the addition amounts of the diffusing agent and the red and green quantum dot crystals directly affect the final light-emitting effect. Among them, the light-emitting effect is the best when 20% of the diffusing agent and 1% of the red and green quantum dot crystals are added.

[0061] When the light and shadow superimposed automotive interior parts prepared in this embodiment are actually installed, the light and shadow superimposed automotive interior parts can be installed inside the vehicle through the environmental parts. The light-emitting structure therein is connected to the vehicle control system through a wire harness and a wire harness connector, and the light and shadow superimposed automotive interior parts are controlled to emit light through the vehicle control system.

[0062] The above are the specific implementation manners of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A light and shadow image-stacked automobile interior decoration part, comprising a transparent body and a light-emitting structure arranged in the transparent body; characterized in that: The light-emitting structure includes a first PC film, a contour layer, a color layer, a diffuser, a second PC film, a side-entry Mini LED light bar, and a reflector; wherein, a contour layer is provided on the back of the first PC film, and a contour line of a display pattern is provided on the contour layer, and a color layer is provided on the back of the contour layer, and the color and contour of the display pattern are provided on the color layer, and the light transmittance of the contour layer must meet the color and contour of the color layer projected when the light-emitting structure is turned on, and the color and contour of the color layer are not projected when it is not turned on; the diffuser is arranged between the color layer and the second PC film for uniform light processing; a side-entry Mini LED light bar is provided on the side of the second PC film, and dots are printed on the lower surface of the second PC film or formed by laser dotting, and the dots destroy the total reflection of light in the second PC film, change the propagation path of light, make the light evenly distributed, and finally form a uniform surface light source; a reflector is provided on the back of the second PC film, and the reflector is used to improve the utilization rate and brightness uniformity of light and reduce the loss of light source; The edge-entry Mini LED light bar includes a flexible substrate, a Mini LED blue light wafer, and an optical sealing layer; wherein the Mini LED blue light wafer is mounted on the flexible substrate by flip-chip means, the optical sealing layer is used to encapsulate the MiniLED blue light wafer therein, and red quantum dot crystals, green quantum dot crystals, and a diffusant are provided in the optical sealing layer, and the MiniLED blue light wafer excites the red quantum dot crystals and green quantum dot crystals to form white light.

2. The light and shadow image-stacked automobile interior decoration component according to claim 1, characterized in that: The diffuser is composed of four layers of film, which are upper diffuser, upper brightness enhancement film, lower brightness enhancement film and lower diffuser from top to bottom. The overall thickness of the diffuser is 0.8mm. The optical film is used to even out the light and increase the overall brightness, so that the light is evenly diffused. The thickness of the second PC film is 0.5-0.6 mm.

3. The light and shadow image-stacked automobile interior decoration component according to claim 1, characterized in that: The flexible substrate is an FPC substrate, the thickness of the Mini LED blue light wafer is 0.15 mm, the thickness of the FPC substrate is 0.15 mm, and the thickness of the optical sealing layer is 0.25 mm.

4. The light and shadow image-stacked automobile interior decoration component according to claim 1, characterized in that: The wavelength of the red quantum dot crystal is 625±2nm, and the wavelength of the green quantum dot crystal is 525±2nm. The diffusing agent is a silicone diffusing agent. 10%-20% of the silicone diffusing agent, 0.1%-1% of the red quantum dot crystal and the green quantum dot crystal are added to the main material of the optical sealing layer. The ratio of the red quantum dot crystal to the green quantum dot crystal is 1:2; the silicone diffusing agent can scatter the light, change the propagation direction of the light, and make the light more evenly distributed.

5. The light and shadow image-stacked automobile interior decoration component according to claim 1, characterized in that: The red quantum dot crystals include CdS, ZnS, CdSe, InP, and InGaAs quantum dots, and the green quantum dot crystals include CdS, ZnS, CdSe, InP, and InGaAs quantum dots.

6. The light and shadow image-stacked automobile interior decoration component according to claim 1, characterized in that: The transparent body is in the form of a third PC film or a transparent plastic piece covering a transparent surface.

7. The light and shadow image-stacked automobile interior decoration component according to claim 4, characterized in that: 15-20% of an organic silicon diffuser, 0.7-1% of red quantum dot crystals and green quantum dot crystals are added to the main material of the optical sealing layer, and the ratio of the red quantum dot crystals to the green quantum dot crystals is 1:

2.

8. The method for preparing the light and shadow image-stacked automobile interior decoration part according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: Step 1. Prepare Mini LED light strip; Step 1.

1. Mount the Mini LED blue light wafer on the flexible substrate by flip-chip method; Step 1.

2. Materials for preparing optical sealing layer: Take the main material of the optical sealing layer, add 10%-20% of silicone diffusing agent, 0.1%-1% of red quantum dot crystals and green quantum dot crystals into the main material; wherein the ratio of the red quantum dot crystals to the green quantum dot crystals is 1:2, mix the materials evenly, and use the evenly mixed materials to encapsulate the Mini LED blue light wafer to form an optical sealing layer on the Mini LED blue light wafer; Step 2. Install the Mini LED light bar on the side of the support frame. A reflector is provided inside the support frame. The reflector is fixed to the bottom of the support frame. A second PC film with dots on the lower surface is fixed to the front of the reflector by a high-transmittance 3M glue. The diffuser is fixed to the front of the second PC film by a high-transmittance 3M glue. Step 3. The first PC film, the contour layer, and the color layer are combined into a whole and then installed on the top surface of the support frame, and the color layer is closely attached to the diffuser to form a light-emitting structure; Step 4. Integrally mold the third PC film and the light-emitting structure to form a light-and-shadow overlapping automobile interior decoration part.

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