Dimming projection film assembly, display device and electric equipment

Abstract

The utility model discloses a dimming projection film assembly, a display device and electric equipment. The dimming projection film assembly comprises a projection layer and a dimming layer, the projection layer is a transparent projection film or a non-transparent projection film, the dimming layer is fixedly connected with the projection layer, the transmittance of the dimming layer is adjustable, and the haze of the dimming layer is not greater than 10%. According to the dimming projection film assembly, the dimming layer with the haze not larger than 10% and larger than or equal to 0% is adopted, so that when the projection layer is a transparent projection film, the dimming projection film assembly can achieve full-transparent display in the whole process while achieving dimming, or when the projection layer is a non-transparent projection film, the dimming projection film assembly can achieve full-transparent display in the whole process while achieving full-transparent display in the whole process while achieving full-transparent display in the whole process while achieving full-transparent display in the whole process. According to the dimming projection film assembly, whole-process non-transparent display can be achieved while dimming is conducted, and therefore transparency consistency in the whole-process display process is achieved.

Description

Technical Field

[0001] This application relates to the field of image display technology, and more specifically, to a dimming projection film assembly, a display device, and an electrical device. Background Technology

[0002] In related technologies, dimming films or dimming glasses typically only have dimming functions and are generally single-layer structures. They usually utilize the high haze characteristics of the single-layer film in the power-off state to combine with projection equipment to achieve display functions.

[0003] Some technical solutions that use integrated composite films typically employ traditional PDLC (Polymer dispersed liquid crystal), Dye LC (Dye liquid crystal), or SPD (Suspended particle device) as dimming films, superimposed with transparent projection films. This method can achieve dimming functionality, but it displays in a transparent state when powered on and in a non-transparent state (high haze) when powered off. That is, it is a low-contrast transparent display when powered on and a high-contrast non-transparent display when powered off, resulting in inconsistent transparency throughout the display process. Utility Model Content

[0004] This application aims to at least partially address one of the aforementioned technical problems in the prior art. To this end, this application proposes a dimming projection film assembly capable of being either fully transparent or entirely opaque throughout the entire on and off operation.

[0005] This application also proposes a display device having the above-described dimming projection film assembly.

[0006] This application also proposes an electrical device having the above-mentioned display device.

[0007] According to an embodiment of this application, a dimming projection film assembly includes a projection layer and a dimming layer. The projection layer is a transparent projection film or a non-transparent projection film. The dimming layer is fixedly connected to the projection layer. The transmittance of the dimming layer is adjustable. The haze of the dimming layer is not greater than 10%, and the haze of the dimming layer is greater than or equal to 0%.

[0008] According to the embodiments of this application, the dimming projection film assembly adopts a dimming layer with a haze of no more than 10% and greater than or equal to 0%, so that when the projection layer is a transparent projection film, the dimming projection film assembly can achieve a fully transparent display throughout the entire process while having dimming capabilities, or when the projection layer is a non-transparent projection film, the dimming projection film assembly can achieve a non-transparent display throughout the entire process while having dimming capabilities, thereby achieving consistent transparency throughout the entire display process.

[0009] According to some embodiments of this application, the dimming layer is an electrochromic EC dimming film, an electropolarized crystal EPC dimming film, or an electronic ink E ink dimming film.

[0010] According to some embodiments of this application, the dimming layer is an electrochromic EC dimming film, the transmittance of the electrochromic EC dimming film is 70%~80% when it is powered on, the transmittance is less than 10% when it is powered off, and the haze of the electrochromic EC dimming film is less than 3%.

[0011] According to some embodiments of this application, the dimming layer is an electropolarized crystal EPC dimming film, the electropolarized crystal EPC dimming film has a transmittance of 70%~80% when energized and less than 1% when energized and de-energized, and the haze of the electropolarized crystal EPC dimming film is not greater than 10%.

[0012] According to some embodiments of this application, the dimming layer is an electronic ink dimming film, wherein the electronic ink dimming film has a transmittance of more than 50% when powered on and less than 1% when powered off, and the haze of the electronic ink dimming film is less than 5%.

[0013] According to some embodiments of this application, the projection layer is a transparent projection film, and the transmittance of the transparent projection film is not less than 80% and the haze is less than 2.5%.

[0014] According to some embodiments of this application, the projection layer is a non-transparent projection film, which is a PDLC film, an SPD film, or a Dye LC film. The non-transparent projection film is in a power-off state, the haze of the non-transparent projection film is greater than 80%, and the transmittance of the SPD film and the Dye LC film is not less than 30%.

[0015] According to some embodiments of this application, the dimming layer and the projection layer are arranged parallel to each other.

[0016] According to some embodiments of this application, the dimming layer is disposed on the side of the projection layer facing away from the projection device.

[0017] According to some embodiments of this application, the dimming projection film assembly further includes a first adhesive layer disposed between the dimming layer and the projection layer, the first adhesive layer being used to bond the dimming layer and the projection layer.

[0018] According to some embodiments of this application, the transmittance of the first adhesive layer is greater than 90%, the haze of the first adhesive layer is less than 1%, and the thickness of the first adhesive layer ranges from 50um to 200um.

[0019] A display device according to a second aspect of this application includes a substrate and the above-described dimming projection film assembly, wherein the dimming projection film assembly is fixed to the substrate.

[0020] According to some embodiments of this application, the substrate is a transparent substrate.

[0021] According to the display device of the present application embodiment, the dimming projection film assembly adopts a dimming layer with a haze of no more than 10% and greater than or equal to 0%, so that when the projection layer is a transparent projection film, the dimming projection film assembly can achieve a fully transparent display throughout the entire process while having dimming capabilities, or when the projection layer is a non-transparent projection film, the dimming projection film assembly can achieve a non-transparent display throughout the entire process while having dimming capabilities, thereby achieving consistent transparency throughout the entire display process.

[0022] According to some embodiments of this application, the dimming layer is located between the substrate and the projection layer, the dimming layer is bonded and fixed to the substrate, and the dimming layer is bonded and fixed to the projection layer.

[0023] According to some embodiments of this application, there are two substrates, including a first substrate and a second substrate. The dimming projection film assembly is sandwiched between the first substrate and the second substrate. The dimming layer is close to the first substrate, and the projection layer is close to the second substrate. The dimming layer and the projection layer are bonded and fixed. A third hot melt adhesive layer is provided between the dimming layer and the first substrate, and a fourth hot melt adhesive layer is provided between the projection layer and the second substrate.

[0024] A display device according to a third aspect of this application includes a substrate and the aforementioned dimming projection film assembly. The dimming projection film assembly is fixed to the substrate. There are two substrates, including a third substrate and a fourth substrate. The dimming layer is sandwiched between the third substrate and the fourth substrate. A fifth hot melt adhesive layer is provided between the dimming layer and the third substrate. A sixth hot melt adhesive layer is provided between the dimming layer and the fourth substrate. The projection layer is located on the side of the fourth substrate opposite to the dimming layer. The projection layer is bonded and fixed to the fourth substrate.

[0025] According to some embodiments of this application, the substrate is a transparent substrate.

[0026] According to some embodiments of this application, the substrate is a glass plate, a transparent polycarbonate plate, or other transparent dielectric plate.

[0027] The electrical appliance according to the fourth aspect of this application includes the display device described above.

[0028] According to the embodiments of the present application, the dimming projection film assembly of the display device adopts a dimming layer with a haze of no more than 10% and greater than or equal to 0%, so that when the projection layer is a transparent projection film, the dimming projection film assembly can achieve a fully transparent display throughout the entire process while dimming, or when the projection layer is a non-transparent projection film, the dimming projection film assembly can achieve a non-transparent display throughout the entire process while dimming, thereby achieving consistent transparency throughout the entire display process.

[0029] It is understandable that for fully transparent or non-transparent displays of dimming projection film components, the function of displaying images needs to be realized in conjunction with a projection device. The projection device can project light onto the transparent or non-transparent projection film to achieve the function of displaying images.

[0030] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of a dimming projection film assembly according to an embodiment of this application;

[0032] Figure 2 This is a schematic diagram of the EC dimming film, the first adhesive layer, and the transparent projection film;

[0033] Figure 3 This is a schematic diagram of the EPC dimming film, the first adhesive layer, and the transparent projection film;

[0034] Figure 4 This is a schematic diagram of the E ink dimming film, the first adhesive layer, and the transparent projection film;

[0035] Figure 5 This is a schematic diagram of the EC dimming film, the first adhesive layer, and the non-transparent projection film;

[0036] Figure 6 This is a schematic diagram of the EPC dimming film, the first adhesive layer, and the non-transparent projection film;

[0037] Figure 7 This is a schematic diagram of the E ink dimming film, the first adhesive layer, and the non-transparent projection film;

[0038] Figure 8 This is a schematic diagram illustrating the working principle of the EC dimming film. Figure 8 a is a state diagram of the EC dimming film in the power-off state. Figure 8 b is the state diagram of the EC dimming film when it is in the energized on-state;

[0039] Figure 9 This is a schematic diagram illustrating the working principle of the EPC dimming film. Figure 9 a is a state diagram of the EPC dimming film in the power-off state. Figure 9 b is a state diagram of the EPC dimming film in the energized, on-state.

[0040] Figure 10 This is a schematic diagram illustrating the working principle of E-ink dimming film, in which... Figure 10 a is a state diagram of the E ink dimming film in the power-off state. Figure 10 b is a state diagram of the E ink dimming film in the energized, on-state.

[0041] Figure 11 This is a schematic diagram of a display device according to an embodiment of the present application;

[0042] Figure 12 This is a schematic diagram of a display device according to another embodiment of this application;

[0043] Figure 13 This is a schematic diagram of a display device according to yet another embodiment of this application;

[0044] Figure 14 This is a schematic diagram of an electrical device according to an embodiment of this application.

[0045] Figure label:

[0046] Electrical equipment 10000, display device 1000, dimming projection film assembly 100, projection layer 10, transparent projection film 1, non-transparent projection film 2, dimming layer 20, EC dimming film 3, electrolyte layer 31, ion storage layer 32, electrochromic layer 33, transparent conductive layer 34, EPC dimming film 4, polarized crystal 41, charged particles 42, E ink dimming film 5, microcapsule 51, electrophoretic particles 52, first adhesive layer 6, second adhesive layer 82, third hot melt adhesive layer 83, fourth hot melt adhesive layer 84, fifth hot melt adhesive layer 85, sixth hot melt adhesive layer 86, substrate 9, first substrate 91, second substrate 92, third substrate 93, fourth substrate 94. Detailed Implementation

[0047] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0048] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] The following is combined with Figures 1-14 This application provides a detailed description of the dimming projection film assembly 100, the display device 1000, and the electrical device 10000 according to embodiments of the present application.

[0050] Reference Figure 1 As shown, the dimming projection film assembly 100 according to the embodiments of this application may include a projection layer 10 and a dimming layer 20. The projection layer 10 is a transparent projection film 1 or a non-transparent projection film 2. The dimming layer 20 is fixedly connected to the projection layer 10. The transmittance of the dimming layer 20 is adjustable. The dimming layer 20 is a low haze dimming layer.

[0051] In some embodiments of this application, the haze of the dimming layer 20 is no greater than 10%. In other words, during the dimming process (i.e., the process of adjusting the transmittance of the dimming layer 20), the haze of the dimming layer 20 is always small, and the dimming layer 20 is transparent. In the power-on state and the power-off state, the haze of the dimming layer 20 will not increase, and it will not affect the display of the projection layer 10.

[0052] In some embodiments of this application, the haze of the dimming layer 20 is greater than or equal to 0%.

[0053] For example, the haze of the dimming layer 20 can be 0%, 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, etc.

[0054] When the projection layer 10 is a transparent projection film 1, the dimming projection film assembly 100 can achieve a fully transparent display throughout the entire process while simultaneously providing dimming capabilities. The transparent projection film 1 is made of a novel micro-nano optical material, which possesses characteristics completely different from traditional optical materials: the transparent projection film 1 can reflect the light from the projection device (regardless of the light transmission of the transparent projection film 1 to the projection device), achieving directional light reflection and thus presenting a high-definition and bright display image effect. At the same time, ambient light almost completely passes through the transparent projection film 1 (regardless of the reflection of ambient light by the transparent projection film 1), allowing the view behind the film to be seen, achieving a perfect fusion of transparent display and real scene, and achieving a truly transparent projection display effect.

[0055] The significant advantage of fully transparent displays is that the view outside the display medium can be seen, and the entire process has a transparent texture. In practical applications, fully transparent displays increase the immersiveness and technological feel of the display effect, especially in the future field of in-vehicle travel, adding a sense of science fiction and interaction between the inside and outside of the vehicle.

[0056] When the projection layer 10 is a non-transparent projection film 2, the dimming projection film assembly 100 can achieve a completely non-transparent display while simultaneously dimming. The non-transparent projection film 2 has high haze (haze > 80%). Utilizing the high haze characteristic of the non-transparent projection film 2, diffuse reflection imaging of the projection display is achieved. Its function is equivalent to that of a projection display film, but it is not transparent, and the scene behind the film cannot be seen.

[0057] For example, the haze of the non-transparent projection film 2 can be 81%, 85%, 90%, 95%, 99%, etc.

[0058] A significant advantage of non-transparent displays is that they can completely isolate the view outside the display medium, providing excellent privacy throughout. Furthermore, non-transparent displays enhance user privacy and the sense of boundary between the inside and outside of the vehicle in practical automotive applications.

[0059] A haze meter (also known as a transmittance meter) is typically used to measure haze and transmittance. A haze meter can simultaneously measure transmitted and scattered light flux, thereby calculating haze and transmittance.

[0060] Table 1 compares Examples 1-10 (where the haze of the dimming layer 20 is no greater than 10%) with Comparative Examples 1-10 (where the haze is greater than 10%) during the dimming process.

[0061]

[0062] As shown in Table 1, when the haze of the dimming layer 20 is no greater than 10%, the dimming layer 20 exhibits low haze and high transparency, achieving a good transparent display effect. However, when the haze of the dimming layer is greater than 10%, the transparent display effect is poor or impossible to achieve. Table 1 also shows that when the haze of the dimming layer 20 is no greater than 10%, a transparent display effect can be achieved when the dimming projection film assembly 100 uses the transparent projection film 1, and a non-transparent display effect can be achieved when the dimming projection film assembly 100 uses the non-transparent projection film 2.

[0063] According to the embodiments of this application, the dimming projection film assembly 100 employs a dimming layer 20 with a haze of no more than 10% and greater than or equal to 0%. This allows the dimming projection film assembly 100 to achieve fully transparent display throughout the entire process while simultaneously dimming when the projection layer 10 is a transparent projection film 1, or to achieve fully opaque display throughout the entire process while dimming when the projection layer 10 is a non-transparent projection film 2. This ensures consistent transparency throughout the entire display process. While fulfilling the dimming function, users can choose between a dimming projection film assembly 100 with a transparent projection film 10 or a non-transparent projection film 2, based on their actual usage needs.

[0064] It is understandable that for the fully transparent or fully non-transparent display of the dimming projection film assembly 100, the function of displaying images needs to be realized in conjunction with a projection device. The projection device can project light onto the transparent projection film 1 or the non-transparent projection film 2 to realize the function of displaying images.

[0065] In some embodiments of this application, reference is made to Figures 2-7 As shown, the dimming layer 20 is an electrochromic (EC) dimming film 3, an electropolarized crystal (EPC) dimming film 4, or an electronic ink (E) dimming film 5, hereinafter referred to as EC dimming film 3, EPC dimming film 4, and E ink dimming film 5. EC dimming film 3, EPC dimming film 4, and E ink dimming film 5 are all electrochromic dimming films. Their core principle is that the electrochromic layer undergoes a chemical or physical reaction to achieve light control.

[0066] In some embodiments of this application, reference is made to Figure 2 , Figure 5 As shown, the dimming layer 20 is an EC dimming film 3. The EC dimming film 3 has a transmittance of 70%~80% when powered on and less than 10% when powered off, and a haze of less than 3%. For example, the transmittance of the EC dimming film 3 when powered on can be 70%, 75%, 77%, 80%, etc., and the transmittance of the EC dimming film 3 when powered off can be 6%, 7%, 8%, 9%, etc., and the haze of the EC dimming film 3 can be 1%, 1.5%, 2%, 2.5%, etc.

[0067] The basic principle of EC dimming film 3 is to utilize the oxidation-reduction reaction of the electrochromic layer to achieve color-changing dimming technology. It can switch between transparent and tinted states while maintaining transparency (low haze) during the color-changing process. Its transmittance in the transparent state is 70%~80%, and in the tinted state, the transmittance is <10%. The haze throughout the dimming process is <3%, and the subjective color is dark blue or grayish-black. A schematic diagram of its working principle is shown below. Figure 8 As shown.

[0068] Reference Figure 8 As shown, the EC dimming film 3 includes an electrolyte layer 31, an ion storage layer 32, an electrochromic layer 33, and a transparent conductive layer 34. The electrolyte layer 31 is located between the ion storage layer 32 and the electrochromic layer 33. The transparent conductive layer 34 is provided on both the side of the ion storage layer 32 facing away from the electrolyte layer 31 and the side of the electrochromic layer 33 facing away from the electrolyte layer 31. When the EC dimming film 3 is in the power-off state... Figure 8 As shown in Figure a, ions in the ion storage layer 32 enter the electrochromic layer 33, causing the electrochromic layer 33 to become colored, thereby reducing the transmittance of the EC dimming film 3; when the EC dimming film 3 is in the energized on state, as... Figure 8 As shown in b, ions in the electrochromic layer 33 return to the ion storage layer 32, causing the electrochromic layer 33 to fade, thereby increasing the transmittance of the EC dimming film 3. Dimming is achieved by changing the transmittance of the EC dimming film 3.

[0069] In some embodiments of this application, reference is made to Figure 3 , Figure 6 As shown, the dimming layer 20 is an EPC dimming film 4. The EPC dimming film 4 has a transmittance of 70%~80% when powered on and less than 1% when powered off. The haze of the EPC dimming film 4 is no greater than 10%. For example, the transmittance of the EPC dimming film 4 when powered on can be 70%, 75%, 77%, 80%, etc., and the transmittance of the EPC dimming film 4 when powered off can be 0.1%, 0.15%, 0.2%, 0.25%, 0.5%, 0.8%, etc., and the haze of the EPC dimming film 4 can be 1%, 1.5%, 2%, 2.5%, 5%, 6%, 7%, 8%, 9%, etc.

[0070] Reference Figure 9 As shown, the EPC dimming film 4 is a film-forming material in which polarized crystals 41 are suspended and dispersed in a polymer network. Its basic principle is to achieve light blocking and transmission by inducing electroosmosis and utilizing the specific movement and arrangement of charged particles 42 under an electric field, thereby realizing dimming technology. Furthermore, it can switch between transparent and colored states, maintaining transparency (low haze) during the color-changing process. In the transparent state (i.e., the electrically on state, such as...) Figure 9 The transmittance under (as shown in b) is 70%~80%, and in the colored state (i.e., the power-off state, such as...) Figure 9 The transmittance is <1% under (as shown in a), the haze is ≤10% throughout the dimming process, and the subjective color is dark blue or black. Its working principle diagram is as follows: Figure 9 As shown.

[0071] In some embodiments of this application, reference is made to Figure 4 , Figure 7 As shown, the dimming layer 20 is an E-ink dimming film 5. The E-ink dimming film 5 has a transmittance greater than 50% when powered on and less than 1% when powered off, and a haze of less than 5%. For example, the transmittance of the E-ink dimming film 5 when powered on can be 51%, 55%, 60%, 65%, 70%, 75%, 77%, 80%, etc., and the transmittance of the E-ink dimming film 5 when powered off can be 0.1%, 0.15%, 0.2%, 0.25%, 0.5%, 0.8%, etc., and the haze of the E-ink dimming film 5 can be 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, etc.

[0072] E ink dimming film 5 is a film-forming material composed of millions of microcapsules 51, each containing black electrophoretic particles 52 suspended in a transparent liquid. Its basic principle is to control the movement and arrangement of the black electrophoretic particles 52 within the microcapsules 51 to achieve light blocking and transmission, thereby realizing dimming technology. Furthermore, it can switch between transparent and colored states, maintaining transparency (low haze) during the color-changing process. In its transparent state (i.e., the electrically on state, such as...)... Figure 10 The transmittance at the (as shown in b) level is >50%, and in the colored state (i.e., the power-off state, such as...), the transmittance is >50%, and in the colored state (i.e., the power-off state, such as...). Figure 10 The transmittance is <1% under (as shown in a), the haze is <5% throughout the dimming process, and the subjective color is deep black. Its working principle diagram is as follows: Figure 10 As shown.

[0073] In some embodiments of this application, reference is made to Figures 2-4 As shown, the projection layer 10 is a transparent projection film 1, which has a transmittance of not less than 80% and a haze of less than 2.5%. The transparent projection film 1 is used to carry high-definition image information of the projection device and is a display device. At the same time, it also has the unique characteristic of high transmittance, which can reach more than 80% and haze < 2.5%, making it a highly transparent film material.

[0074] In some embodiments of this application, reference is made to Figure 2 As shown, the dimming projection film assembly 100 includes an EC dimming film 3 and a transparent projection film 1.

[0075] In some embodiments of this application, reference is made to Figure 3As shown, the dimming projection film assembly 100 includes an EPC dimming film 4 and a transparent projection film 1.

[0076] In some embodiments of this application, reference is made to Figure 4 As shown, the dimming projection film assembly 100 includes an E ink dimming film 5 and a transparent projection film 1.

[0077] Reference Figures 2-4 As shown, utilizing the unique optical properties of the transparent projection film 1 and combining it with the dimming characteristics of the electrochromic dimming film, this application proposes dimming display technology solutions for integration with projection devices, namely EC dimming film 3 + transparent projection film 1, EPC dimming film 4 + transparent projection film 1, and E ink dimming film 5 + transparent projection film 1. These three novel technical solutions differ from the traditional methods of PDLC dimming film + transparent projection film 1, or Dye LC dimming film + transparent projection film 1, or SPD dimming film + transparent projection film 1. These traditional methods are transparent (low haze) when powered on and non-transparent (high haze) when powered off, failing to achieve transparent display throughout the entire process. Furthermore, the PDLC dimming film is milky white, the Dye LC dimming film is light black, and the SPD dimming film is blue. All three dimming films are light-colored in the dimming state, resulting in low contrast and poor display effect during projection. Additionally, the light colors are not conducive to the absorption of ambient light, thus hindering the blocking of infrared and ultraviolet rays.

[0078] The dimming display technology solutions proposed in this application, namely EC dimming film 3 + transparent projection film 1, EPC dimming film 4 + transparent projection film 1, and E ink dimming film 5 + transparent projection film 1, can realize both dimming and display functions. Furthermore, they maintain a fully transparent display state throughout the entire operation, achieving true full transparency. In addition, EC dimming film 3 is dark blue or grayish-black, EPC dimming film 4 is dark blue or black, and E ink dimming film 5 is dark black. These three dimming films are all dark-colored in dimming mode, resulting in higher contrast and better display effects during projection. Simultaneously, the dark color helps absorb ambient light, thus providing superior protection against infrared and ultraviolet rays.

[0079] Reference Figures 2-4As shown, each of the three integrated composite film solutions—EC dimming film 3 + transparent projection film 1, EPC dimming film 4 + transparent projection film 1, and E ink dimming film 5 + transparent projection film 1—can achieve four different states: light transmission, light blocking, low-contrast transparent display, and high-contrast transparent display. Throughout the entire operation, it remains in a fully transparent display state. These four states, while achieving intelligent dimming, can be combined with a projection device and the transparent projection film 1 to display image content. When the integrated composite film of these three solutions operates in dimming mode, it can achieve both light transmission and light blocking dimming functions, with continuous stepless adjustment. When the integrated composite film of these three solutions operates in display mode, it can achieve both low-contrast transparent display and high-contrast transparent display. In low-contrast transparent display, the dimming film is powered on, allowing light to enter. At this time, the projection layer 10 displays an image with reduced ambient light contrast due to the entry of external light, resulting in a lower contrast of the displayed image—this is low-contrast transparent display. When a high-contrast transparent display is achieved, the dimming film operates in the power-off state, preventing light from entering. At this time, the projection layer 10 is not affected by external light, which improves the ambient light contrast and makes the display image have a higher contrast, which is the high-contrast transparent display.

[0080] Reference Figures 2-4 As shown, EC dimming film 3, EPC dimming film 4, and E ink dimming film 5 are all electrochromic dimming films. They all have a dark appearance and low haze value throughout the entire working process, making them completely transparent. By using a completely transparent electrochromic dimming film in combination with a completely transparent transparent projection film 1, the dimming function of this integrated composite film and the completely transparent display state throughout the entire working process can be achieved.

[0081] In some embodiments of this application, reference is made to Figures 5-7 As shown, the projection layer 10 is a non-transparent projection film 2, which is a PDLC film, SPD film, or Dye LC film. The non-transparent projection film 2 is in a power-off state, and the haze of the non-transparent projection film 2 is greater than 80%.

[0082] When the non-transparent projection film 2 is a PDLC film, SPD film, or Dye LC film, it is not used as a traditional dimming film layer, but as a projection display film layer. It utilizes the high haze characteristics (haze at least >80%) of the PDLC film, SPD film, or Dye LC film in the non-transparent state when the power is off, to achieve diffuse reflection imaging display of light. Its function is equivalent to a projection display film, but it is not transparent. Traditional methods of using a PDLC dimming film + transparent projection film 1, or a Dye LC dimming film + transparent projection film 1, or an SPD dimming film + transparent projection film 1, result in a transparent display state (low haze) when powered on and a non-transparent display state (high haze) when powered off. This cannot achieve a completely non-transparent display throughout the entire process, and the effect of blocking infrared and ultraviolet rays is poor. The multifunctional integrated composite dimming display technology solution proposed in this application, namely the dimming display technology solution of dimming layer 20 + non-transparent projection film 2, can realize dimming function and non-transparent display function. It is in a non-transparent display state throughout the entire operation, which is a true non-transparent display. At the same time, this solution also has a good effect of blocking infrared and ultraviolet rays.

[0083] When the PDLC membrane is in the off-state, the permeability of the PDLC membrane is greater than 70%, for example, it can be 79%.

[0084] When the SPD membrane is in the off-state, the permeability of the SPD membrane is not less than 30%, for example, it can be 30%, 32%, 35%, etc.

[0085] When the Dye LC membrane is in the off-state, the permeability of the Dye LC membrane is not less than 30%, for example, it can be 30%, 32%, 35%, etc.

[0086] It is understandable that SPD membranes and Dye LC membranes can be manufactured to meet the requirement that the transmittance is not less than 30% when the membrane is off.

[0087] When the dimming layer 20 is an EC dimming film 3, an EPC dimming film 4, or an E ink dimming film 5, and the non-transparent projection film 2 is a PDLC film, an SPD film, or a Dye LC film, the dimming layer 20 + the non-transparent projection film 2 constitutes 9 specific schemes, namely EC dimming film 3 + PDLC film, EPC dimming film 4 + PDLC film, E ink dimming film 5 + PDLC film, EC dimming film 3 + SPD film, EPC dimming film 4 + SPD film, E ink dimming film 5 + SPD film, EC dimming film 3 + Dye LC film, EPC dimming film 4 + Dye LC film, and E ink dimming film 5 + Dye LC film.

[0088] Reference Figures 5-7As shown, each of the nine integrated composite functional film solutions—EC dimming film 3+PDLC film, EPC dimming film 4+PDLC film, E ink dimming film 5+PDLC film, EC dimming film 3+SPD film, EPC dimming film 4+SPD film, E ink dimming film 5+SPD film, EC dimming film 3+Dye LC film, EPC dimming film 4+Dye LC film, and E ink dimming film 5+Dye LC film—can achieve four different states: light transmission, light blocking, low-contrast non-transparent display, and high-contrast non-transparent display. Throughout the entire operation, it remains in a non-transparent display state. These four states, while achieving intelligent dimming, can be combined with projection devices and non-transparent projection film 2 to display image content. When the integrated composite functional film of these nine solutions operates in dimming mode, it can achieve both light transmission and light blocking dimming functions, with continuous stepless adjustment. When the integrated composite functional film of these nine solutions operates in display mode, it can achieve both low-contrast non-transparent display and high-contrast non-transparent display. When achieving a low-contrast non-transparent display, the dimming film operates in the powered-on state, allowing light to enter. In this case, the projection layer 10's image display is affected by the entry of external light, reducing the ambient light contrast and resulting in a lower contrast for the displayed image; this is known as a low-contrast non-transparent display. Conversely, when achieving a high-contrast non-transparent display, the dimming film operates in the powered-off state, preventing light from entering. In this case, the projection layer 10's image display is unaffected by external light, increasing the ambient light contrast and resulting in a higher contrast for the displayed image; this is known as a high-contrast non-transparent display.

[0089] Reference Figures 5-7 As shown, EC dimming film 3, EPC dimming film 4, and E Ink dimming film 5 are all electrochromic dimming films, all with a dark appearance and low haze value throughout operation, essentially a fully transparent state. It should be noted that the non-transparent projection film 2 is not a dimming film in this integrated composite functional film and does not play a dimming role. Here, the non-transparent projection film 2 is used to carry the high-definition image information of the projection device; it is an equivalent non-transparent display functional device of the projection film. Furthermore, it only operates in the off-state high-haze state (haze > 80%), utilizing the high haze characteristic of the non-transparent projection film 2 in the off-state to achieve diffuse reflection imaging for projection display. Therefore, the non-transparent projection film 2 here is a projection display film, a highly hazy non-transparent film material. Therefore, by using a fully transparent electrochromic dimming film combined with the high-haze non-transparent projection film 2, the integrated composite functional film can achieve dimming and a non-transparent display state throughout its operation.

[0090] In some embodiments of this application, reference is made to Figure 1 As shown, the dimming layer 20 and the projection layer 10 are arranged parallel to each other.

[0091] In some embodiments of this application, the dimming layer 20 is disposed on the side of the projection layer 10 facing away from the projection device, and the user and the projection device are located on the same side of the projection layer 10. (Refer to...) Figure 1 As shown, the dimming layer 20 is located on the left side of the projection layer 10, the projection device is located on the right side of the projection layer 10, and the user is also located on the right side of the projection layer 10. When the dimming layer 20 dims, it can enable the projection layer 10 to achieve different projection effects to meet the user's needs.

[0092] In some embodiments of this application, reference is made to Figures 1-7 As shown, the dimming projection film assembly 100 also includes a first adhesive layer 6, which is disposed between the dimming layer 20 and the projection layer 10, and is used to bond the dimming layer 20 and the projection layer 10.

[0093] Optionally, the first adhesive layer 6 is glue, solid glue, etc.

[0094] In some embodiments of this application, the first adhesive layer 6 is an optical adhesive, such as OCA (Optically Clear Adhesive), OCR (Optical Clear Resin), etc., and the transmittance of the first adhesive layer 6 is >90%, the haze of the first adhesive layer 6 is <1%, and the thickness of the first adhesive layer 6 is typically 50um~200um.

[0095] For example, the transmittance of the first adhesive layer 6 can be 92%, 94%, 95%, 96%, etc., the haze of the first adhesive layer 6 can be 0.3%, 0.5%, 0.8%, etc., and the thickness of the first adhesive layer 6 can be 50um, 80um, 100um, 150um, 175um, 200um, etc.

[0096] When the thickness of the first adhesive layer 6 is less than 50 μm, the bonding effect is poor. When the thickness of the first adhesive layer 6 is greater than 200 μm, the first adhesive layer 6 is too thick, resulting in waste.

[0097] The dimming projection film assembly 100 of this application can achieve dimming of the integrated composite functional film and a fully transparent display state throughout the entire working process, or it can achieve dimming of the integrated composite functional film and a non-transparent display state throughout the entire working process. In contrast, the traditional method of using a PDLC dimming film, a Dye LC dimming film, or an SPD dimming film + a transparent projection film 1 results in a transparent display state when powered on and a non-transparent display state (high haze) when powered off. That is, it is a low-contrast transparent display when powered on and a high-contrast non-transparent display when powered off. Therefore, the traditional method cannot achieve a fully transparent state or a non-transparent state throughout the entire working process; that is, the traditional technology cannot simultaneously achieve dimming and a fully transparent display throughout the entire process, or dimming and a non-transparent display throughout the entire process.

[0098] PDLC dimming films can only achieve projection display function when the power is off, utilizing their high haze characteristic. Even in the power-off state, they are in a hazy, milky-white state, still possessing high light transmittance. Therefore, their projection display contrast is low, resulting in poor display quality. Furthermore, their adjustment method is step-by-step adjustment, not continuous wide-range stepless adjustment.

[0099] Dye LC dimming films also achieve projection display functionality by utilizing their high haze characteristics in the power-off state. Furthermore, in the power-off state, they appear as a light black color. The dimming range of dye LC dimming films is limited by the dye liquid crystal material, generally divided into different stepped ranges, such as 0.5%~30%, 5%~45%, 10%~50%, and 25%~70% transmittance, corresponding to different dimming ranges; meaning each dimming range is relatively narrow. The adjustment method is also step-by-step adjustment, and continuous wide-range stepless adjustment is not possible.

[0100] SPD dimming film also utilizes its high haze characteristic in the power-off state to achieve projection display function. Furthermore, it appears blue and has a lighter color when powered off. Its adjustment method is stepless, allowing for continuous wide-range stepless adjustment, but the adjustment voltage is relatively high (AC 110V).

[0101] In related technologies, projection displays can be achieved by utilizing the high haze characteristics of a single film structure among PDLC dimming films, Dye LC dimming films, or SPD dimming films in the power-off state. Multi-functional integrated composite film layers are rare. Even when using integrated composite film solutions, they are typically traditional combinations of PDLC dimming film + transparent projection film 1, Dye LC dimming film + transparent projection film 1, or SPD dimming film + transparent projection film 1, combined with a projection device. While these methods can achieve dimming functionality, the display is transparent when powered on and non-transparent (high haze) when powered off. In other words, it's a low-contrast transparent display in the on state and a high-contrast non-transparent display in the off state. Therefore, traditional methods cannot achieve a fully transparent or non-transparent state throughout the entire on and off working process. As a result, traditional technical solutions such as PDLC dimming film, Dye LC dimming film, SPD dimming film, PDLC dimming film + transparent projection film 1, Dye LC dimming film + transparent projection film 1, and SPD dimming film + transparent projection film 1 cannot achieve fully transparent display throughout the entire process while dimming, or achieve non-transparent display throughout the entire process while dimming.

[0102] Table 2 summarizes the technical solutions for traditional PDLC dimming film + transparent projection film 1, or Dye LC dimming film + transparent projection film 1, or SPD dimming film + transparent projection film 1. Table 3 summarizes the technical solutions for the dimming projection film assembly 100 proposed in this application. In Table 3, the non-transparent projection film 2 can be any one of PDLC film, SPD film, or Dye LC film. In this case, the PDLC film, SPD film, or Dye LC film are not dimming films, which is detrimental to their dimming characteristics; they only utilize their high haze characteristics in the off state to achieve projection display. For example, Table 4 shows the characteristics of the dimming projection film assembly 100 where the non-transparent projection film 2 is a PDLC film and the projection layer 10 is a transparent projection film 1.

[0103] Table 2: Summary of Comparisons of Traditional Dimming Display System Solutions

[0104]

[0105] Table 3. Summary of Comparison of Dimming Projection Film Component Schemes in this Application

[0106]

[0107] Table 4. Characteristics of the PDLC film and transparent projection film 1 of this application.

[0108]

[0109] The dimming projection film assembly 100 according to the embodiments of this application can better integrate dimming and display functions, and can achieve both dimming and fully transparent display throughout the process, or both dimming and fully non-transparent display throughout the process.

[0110] Reference Figures 11-12 As shown, the display device 1000 according to the second aspect embodiment of this application includes a substrate 9 and a dimming projection film assembly 100 of the above embodiment, wherein the dimming projection film assembly 100 is fixed to the substrate 9.

[0111] In some embodiments of this application, the substrate 9 is a transparent substrate 9.

[0112] According to the embodiments of the present application, the display device 1000 has a dimming projection film assembly 100 that employs a dimming layer 20 with a haze of no more than 10% and greater than or equal to 0%. This allows the dimming projection film assembly 100 to achieve fully transparent display throughout the entire process when the projection layer 10 is a transparent projection film 1, or to achieve fully non-transparent display throughout the entire process when the projection layer 10 is a non-transparent projection film 2. This achieves consistent transparency throughout the entire display process.

[0113] In some embodiments of this application, the display device 1000 is implemented using a full surface lamination scheme, as described above. Figure 11 As shown, the dimming layer 20 is located between the substrate 9 and the projection layer 10. The dimming layer 20 is bonded and fixed to the substrate 9, and the dimming layer 20 is bonded and fixed to the projection layer 10.

[0114] Specifically, a first adhesive layer 6 is disposed between the dimming layer 20 and the projection layer 10. The first adhesive layer 6 is used to bond the dimming layer 20 and the projection layer 10. The dimming layer 20, the first adhesive layer 6, and the projection layer 10 constitute a dimming projection film assembly 100. The dimming layer 20 is one of an EC dimming film 3, an EPC dimming film 4, or an E Ink dimming film 5, and the projection layer 10 is a transparent projection film 1 or a non-transparent projection film 2. The display device 1000 includes a second adhesive layer 82, which is disposed between the dimming layer 20 and the substrate 9. The second adhesive layer 82 is used to bond the dimming layer 20 and the substrate 9.

[0115] In some embodiments of this application, the second adhesive layer 82 is an optical adhesive, such as OCA, OCR, etc., and the transmittance of the second adhesive layer 82 is >90%, the haze of the second adhesive layer 82 is <1%, and the thickness of the second adhesive layer 82 is typically 50um~200um.

[0116] For example, the transmittance of the second adhesive layer 82 can be 92%, 94%, 95%, 96%, etc., the haze of the second adhesive layer 82 can be 0.3%, 0.5%, 0.8%, etc., and the thickness of the second adhesive layer 82 can be 50um, 80um, 100um, 150um, 175um, 200um, etc.

[0117] In some embodiments of this application, the display device 1000 is implemented using a glass lamination scheme, as described above. Figure 12 As shown, there are two substrates 9, including a first substrate 91 and a second substrate 92. The dimming projection film assembly 100 is sandwiched between the first substrate 91 and the second substrate 92. The dimming layer 20 is close to the first substrate 91, and the projection layer 10 is close to the second substrate 92. The dimming layer 20 and the projection layer 10 are bonded and fixed. A third hot melt adhesive layer 83 is provided between the dimming layer 20 and the first substrate 91, and a fourth hot melt adhesive layer 84 is provided between the projection layer 10 and the second substrate 92.

[0118] Specifically, a first adhesive layer 6 is disposed between the dimming layer 20 and the projection layer 10, and is used to bond the dimming layer 20 and the projection layer 10. The dimming layer 20, the first adhesive layer 6, and the projection layer 10 constitute a dimming projection film assembly 100. The dimming layer 20 is one of an EC dimming film 3, an EPC dimming film 4, or an E Ink dimming film 5, and the projection layer 10 is a transparent projection film 1 or a non-transparent projection film 2. The display device 1000 includes a third hot melt adhesive layer 83 and a fourth hot melt adhesive layer 84. The third hot melt adhesive layer 83 is disposed between the dimming layer 20 and the first substrate 91, and is used to bond the dimming layer 20 and the first substrate 91. The fourth hot melt adhesive layer 84 is disposed between the projection layer 10 and the second substrate 92, and is used to bond the projection layer 10 and the second substrate 92. A high degree of integration of the dimming projection film assembly 100, the first substrate 91, and the second substrate 92 can be achieved through a glass lamination process.

[0119] In some embodiments of this application, the third hot melt adhesive layer 83 can at least partially melt when heated to bond the dimming layer 20 to the first substrate 91. The third hot melt adhesive layer 83 may be PVB (Polyvinyl Butyral), TPU (Thermoplastic Polyurethane Elastomer), or EVA (Ethylene Vinyl Acetate Copolymer).

[0120] In some embodiments of this application, the fourth hot melt adhesive layer 84 can at least partially melt when heated to bond the projection layer 10 to the second substrate 92. The fourth hot melt adhesive layer 84 may be PVB, TPU, or EVA.

[0121] In some embodiments of this application, the first substrate 91 is made of one or two or more pieces of annealed glass.

[0122] In some embodiments of this application, the second substrate 92 is made of one or two or more pieces of annealed glass.

[0123] In some embodiments of this application, a touch layer may also be integrated inside or on the outermost layer of the surface of the first substrate 91.

[0124] In some embodiments of this application, a functional layer for reducing infrared and ultraviolet radiation may also be integrated inside or on the outermost layer of the surface of the first substrate 91.

[0125] In some embodiments of this application, a touch layer may also be integrated inside or on the outermost layer of the surface of the second substrate 92.

[0126] In some embodiments of this application, a functional layer for reducing infrared and ultraviolet radiation may also be integrated inside or on the outermost layer of the surface of the second substrate 92.

[0127] Reference Figure 13 As shown, the display device 1000 according to the third aspect embodiment of this application includes a substrate 9 and a dimming projection film assembly 100 of the above embodiment, wherein the dimming projection film assembly 100 is fixed to the substrate 9.

[0128] In some embodiments of this application, the substrate 9 is a transparent substrate 9.

[0129] The display device 1000 uses a hybrid solution of full surface lamination and glass lamination. (Refer to...) Figure 13 As shown, there are two substrates 9, including a third substrate 93 and a fourth substrate 94. The dimming layer 20 is sandwiched between the third substrate 93 and the fourth substrate 94. A fifth hot melt adhesive layer 85 is provided between the dimming layer 20 and the third substrate 93, and a sixth hot melt adhesive layer 86 is provided between the dimming layer 20 and the fourth substrate 94. The projection layer 10 is located on the side of the fourth substrate 94 opposite to the dimming layer 20, and the projection layer 10 is bonded and fixed to the fourth substrate 94.

[0130] Specifically, the dimming layer 20 is one of EC dimming film 3, EPC dimming film 4, and E Ink dimming film 5, and the projection layer 10 is a transparent projection film 1 or a non-transparent projection film 2. The display device 1000 includes a fifth hot melt adhesive layer 85 and a sixth hot melt adhesive layer 86. The fifth hot melt adhesive layer 85 is disposed between the dimming layer 20 and the third substrate 93 and is used to bond the dimming layer 20 and the third substrate 93. The sixth hot melt adhesive layer 86 is disposed between the dimming layer 20 and the fourth substrate 94 and is used to bond the dimming layer 20 and the fourth substrate 94. The projection layer 10 and the fourth substrate 94 are connected by a first adhesive layer 6.

[0131] The third substrate 93 and the fourth substrate 94 are glass plates. The third substrate 93, the fifth hot melt adhesive layer 85, the dimming layer 20, the sixth hot melt adhesive layer 86, and the fourth substrate 94 are laminated to form dimming glass. The projection layer 10 is laminated to the surface of the fourth substrate 94 by full lamination.

[0132] In some embodiments of this application, the third substrate 93 is made of one or two or more pieces of annealed glass.

[0133] In some embodiments of this application, the fourth substrate 94 is made of one, two, or more pieces of annealed glass.

[0134] In some embodiments of this application, a touch layer may also be integrated inside or on the outermost layer of the surface of the third substrate 93.

[0135] In some embodiments of this application, a functional layer for reducing infrared and ultraviolet radiation may also be integrated inside or on the outermost layer of the surface of the third substrate 93.

[0136] In some embodiments of this application, a touch layer may also be integrated inside or on the outermost layer of the surface of the fourth substrate 94.

[0137] In some embodiments of this application, a functional layer for reducing infrared and ultraviolet radiation may also be integrated inside or on the outermost layer of the surface of the fourth substrate 94.

[0138] In some embodiments of this application, the fifth hot melt adhesive layer 85 can at least partially melt when heated to bond the dimming layer 20 to the third substrate 93. The fifth hot melt adhesive layer 85 may be PVB, TPU, or EVA.

[0139] In some embodiments of this application, the sixth hot melt adhesive layer 86 can at least partially melt when heated to bond the dimming layer 20 to the fourth substrate 94. The sixth hot melt adhesive layer 86 may be PVB, TPU, or EVA.

[0140] In some embodiments of this application, the substrate 9 is a glass plate. Thus, the display device 1000 is an intelligent display glass, which can be applied to electrical equipment 10000. For example, if electrical equipment 10000 is a vehicle, the display glass can be used as a side window of the vehicle. In this way, the side window displays image information for entertainment of people inside the vehicle, as well as information prompts for pedestrians outside the vehicle; or the display glass can be used as a vehicle sunroof, which displays image information, such as a starry sky roof.

[0141] Display glass can be used not only in vehicles, but also in building curtain walls, offices, banks, medical institutions, shopping mall windows, and homes, serving various purposes such as curtains, partitions, and projection screens. In other words, electrical equipment 10000 can be used not only in vehicles, but also as curtains, partitions, and projection screens.

[0142] In some embodiments of this application, the substrate 9 is a transparent polycarbonate sheet. Polycarbonate is a hard plastic, which makes the substrate 9 strong and not easily damaged, thus improving the overall strength of the display device 1000.

[0143] In some embodiments of this application, the substrate 9 may also be other transparent dielectric plates, which will not be listed here.

[0144] Reference Figure 14 As shown, the electrical appliance 10000 according to the fourth aspect of this application includes the display device 1000 of the above embodiment.

[0145] According to the embodiments of the present application, the dimming projection film assembly 100 of the display device 1000 adopts a dimming layer 20 with a haze of no more than 10% and greater than or equal to 0%, so that when the projection layer 10 is a transparent projection film 1, the dimming projection film assembly 100 can achieve a fully transparent display throughout the entire process while having dimming capabilities, or when the projection layer 10 is a non-transparent projection film 2, the dimming projection film assembly 100 can achieve a non-transparent display throughout the entire process while having dimming capabilities, thereby achieving consistent transparency throughout the entire display process.

[0146] In the description of this application, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0147] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0148] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0149] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A dimming projection film assembly (100), characterized by, The projection layer (10) is a transparent projection film (1) or a non-transparent projection film (2). The light-adjustable layer (20) is fixedly connected with the projection layer (10), the transmittance of the light-adjustable layer (20) is adjustable, the haze of the light-adjustable layer (20) is not greater than 10%, and the haze of the light-adjustable layer (20) is greater than or equal to 0%. The light-adjustable layer (20) is an electrochromic EC light-adjustable film (3), an electro-polarization crystal EPC light-adjustable film (4), or an electronic ink E ink light-adjustable film (5). The light-adjustable layer (20) is an electrochromic EC light-adjustable film (3), the transmittance of the electrochromic EC light-adjustable film (3) is 70% to 80% when powered on in an open state, the transmittance of the electrochromic EC light-adjustable film (3) is less than 10% when powered off in a closed state, and the haze of the electrochromic EC light-adjustable film (3) is less than 3%.

2. The dimming projection film assembly (100) of claim 1, wherein, The light-adjustable layer (20) is an electro-polarization crystal EPC light-adjustable film (4), the transmittance of the electro-polarization crystal EPC light-adjustable film (4) is 70% to 80% when powered on in an open state, the transmittance of the electro-polarization crystal EPC light-adjustable film (4) is less than 1% when powered off in a closed state, and the haze of the electro-polarization crystal EPC light-adjustable film (4) is not greater than 10%.

3. The dimming projection film assembly (100) of claim 2, wherein, The light-adjustable layer (20) is an electronic ink E ink light-adjustable film (5), the transmittance of the electronic ink E ink light-adjustable film (5) is greater than 50% when powered on in an open state, the transmittance of the electronic ink E ink light-adjustable film (5) is less than 1% when powered off in a closed state, and the haze of the electronic ink E ink light-adjustable film (5) is less than 5%.

4. The dimming projection film assembly (100) of claim 2, wherein, The projection layer (10) is a transparent projection film (1), the transmittance of the transparent projection film (1) is not less than 80%, and the haze of the transparent projection film (1) is less than 2.5%.

5. The dimming projection film assembly (100) of claim 2, wherein, The projection layer (10) is a non-transparent projection film (2), the non-transparent projection film (2) is a PDLC film or an SPD film or a Dye LC film, the non-transparent projection film (2) is in a powered-off closed state, the haze of the non-transparent projection film (2) is greater than 80%, and the transmittance of the SPD film and the Dye LC film is not less than 30%.

6. The dimming projection film assembly (100) of any of claims 1-5, wherein, The light-adjustable layer (20) and the projection layer (10) are arranged in parallel with each other.

7. The dimming projection film assembly (100) of any of claims 1-5, wherein, The light-adjustable layer (20) is arranged on the side of the projection layer (10) away from the projection device.

8. The dimming projection film assembly (100) of any one of claims 1-5, wherein, The light-adjustable projection film assembly (100) further comprises a first adhesive layer (6) arranged between the light-adjustable layer (20) and the projection layer (10), and the first adhesive layer (6) is used for bonding the light-adjustable layer (20) and the projection layer (10).

9. The dimming projection film assembly (100) of any one of claims 1-5, wherein, The transmittance of the first adhesive layer (6) is greater than 90%, the haze of the first adhesive layer (6) is less than 1%, and the thickness of the first adhesive layer (6) ranges from 50 um to 200 um.

10. The dimming projection film assembly (100) of any one of claims 1-5, wherein, The light-adjustable projection film assembly (100) of any one of claims 1-11 is fixed to the substrate (9).

11. The dimming projection film assembly (100) of claim 10, wherein, The substrate (9) is a transparent substrate (9).

12. A display device (1000), characterized by ​ 13. The display device (1000) according to claim 12, wherein ​ 14. The display device (1000) according to claim 12 or 13, wherein The light-adjusting layer (20) is located between the substrate (9) and the projection layer (10), and is adhesively fixed with the substrate (9) and the projection layer (10).

15. The display device (1000) according to claim 12 or 13, wherein The substrate (9) is two and comprises a first substrate (91) and a second substrate (92), the light-adjusting projection film assembly (100) is clamped between the first substrate (91) and the second substrate (92), the light-adjusting layer (20) is close to the first substrate (91), the projection layer (10) is close to the second substrate (92), the light-adjusting layer (20) and the projection layer (10) are adhesively fixed, and a third hot melt adhesive layer (83) is arranged between the light-adjusting layer (20) and the first substrate (91), and a fourth hot melt adhesive layer (84) is arranged between the projection layer (10) and the second substrate (92).

16. A display device (1000), characterized by The display device (1000) comprises the substrate (9) and the light-adjusting projection film assembly (100) of any one of claims 1-9, the light-adjusting projection film assembly (100) is fixed on the substrate (9), the substrate (9) is two and comprises a third substrate (93) and a fourth substrate (94), the light-adjusting layer (20) is clamped between the third substrate (93) and the fourth substrate (94), a fifth hot melt adhesive layer (85) is arranged between the light-adjusting layer (20) and the third substrate (93), a sixth hot melt adhesive layer (86) is arranged between the light-adjusting layer (20) and the fourth substrate (94), the projection layer (10) is located on a side of the fourth substrate (94) away from the light-adjusting layer (20), and the projection layer (10) and the fourth substrate (94) are adhesively fixed.

17. The display device (1000) according to claim 16, wherein The substrate (9) is a transparent substrate (9).

18. An electrical device (10000), characterized by The display device (1000) comprises the display device (1000) of any one of claims 12-17.

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