Mirror display sun visor

Abstract

The present application discloses a mirror-display sun visor, belonging to the field of sun visors. The mirror-display sun visor includes a sun visor housing, a display module disposed within the sun visor housing, and a display surface of the display module provided with a mirror structure. The display module includes liquid crystal glass; a polarizer is disposed in the liquid crystal glass to cause the display module to emit polarized light; the mirror structure includes a mirror polarizing film; the mirror polarizing film includes several film layers, each of which includes two or more prism structures arranged continuously parallel to the liquid crystal glass. The polarization angle of the polarized light emitted by the display module is the same as the polarization angle of the mirror polarizing film on the mirror structure. The present application can achieve a clear and bright mirror display effect; solve the problem of light energy loss and ghosting caused by the display module being reflected by the mirror glass; and reduce the risk of interference between the mirror glass and the liquid crystal glass and the failure of the liquid crystal display due to direct external light.

Description

Technical Field

[0001] The present application relates to the field of sun visors, and in particular to a mirror display sun visor. Background Art

[0002] The light emitted by the display module in an in-vehicle display has a high transmittance, enabling a high-brightness display effect. The natural light striking the surface of the in-vehicle display has a high reflectance, enabling clear, mirror-like imaging. For ordinary mirror glass, ignoring absorption, the energy of reflected and transmitted light within the visible light band is constant. According to the law of conservation of energy, high reflectance corresponds to low transmittance. The reflectance of ordinary mirror glass typically reaches 65±5%, and the transmittance can reach 35±5%. High-reflectivity ordinary mirror glass, on the other hand, only reaches a reflectance of 85±5%, and a transmittance of 15±5%. Ordinary mirror glass used in in-vehicle displays cannot achieve both high-brightness display effects and high-reflectivity, clear, mirror-like imaging. These two are mutually exclusive. High brightness requires sacrificing high reflectivity for mirror-like imaging. Sacrificing high brightness for high reflectivity, or choosing a balanced mirror, is not ideal. Therefore, achieving a clear, high-brightness mirror display effect is a technical problem currently facing those skilled in the art. Summary of the Invention

[0003] The purpose of this application is to provide a mirror display sun visor to achieve a clear and bright mirror display effect.

[0004] To achieve the above-mentioned purpose, the present application provides a mirror display sun visor, comprising a sun visor shell, a display module is arranged in the sun visor shell, and a display surface of the display module is provided with a mirror structure.

[0005] The display module includes liquid crystal glass; a polarizer is provided in the liquid crystal glass to enable the display module to emit polarized light;

[0006] The mirror structure includes a mirror polarizing film; the mirror polarizing film includes several film layers, and the film layers include two or more prism structures arranged continuously parallel to the direction of the liquid crystal glass. The polarization angle of the polarized light emitted by the display module is the same as the polarization angle of the mirror polarizing film on the mirror structure.

[0007] Optionally, the mirror polarizing film includes two or more film layers; each film layer includes two or more prism structures arranged continuously parallel to the direction of the liquid crystal glass, so that the polarized light is incident on the inclined surface of the prism structure of each layer with the Brewster angle as the incident angle, and is transmitted out through the mirror polarizing film.

[0008] Optionally, the mirror polarizing film includes a first film layer and a second film layer, and the first film layer and the second film layer are arranged alternately; the first film layer includes two or more prism structures with a first refractive index arranged continuously parallel to the direction of the liquid crystal glass, and the second film layer includes two or more prism structures with a second refractive index arranged continuously parallel to the direction of the liquid crystal glass; the first refractive index is greater than the second refractive index.

[0009] Optionally, the display module is a common LED display module, a Mini LED display module, or a Micro LED display module, and a touch module is provided on the display module.

[0010] Optionally, the display module further includes a reflective film; the reflective film is arranged on a surface of the display module facing away from the liquid crystal glass.

[0011] Optionally, the mirror display sun visor further includes: glass; the mirror polarizing film is arranged on the surface of the glass close to the liquid crystal glass, and the glass includes tempered glass.

[0012] Optionally, the surface of the mirror polarizing film close to the liquid crystal glass is divided into a light-transmitting area and a non-light-transmitting area; the light-transmitting area is used to display the picture; the non-light-transmitting area is provided with a black shading layer, and the black shading layer includes black Mylar and / or dark paint.

[0013] Optionally, the mirror display sun visor further includes: a light guide groove, an ambient light, a diffusion film, a controller and a UV camera;

[0014] The light guide groove is an open annular groove arranged around the outer side of the display module;

[0015] The atmosphere lamp is arranged in the light guide groove, and the atmosphere lamp includes one or more of cool color lamp beads, warm color lamp beads and ultraviolet lamp beads; the ultraviolet lamp beads include one or more of UVA lamp beads, UVB lamp beads and UVC lamp beads;

[0016] The diffusion film covers the light guide groove along the circumferential direction of the light guide groove;

[0017] The controller is electrically connected to the atmosphere lamp;

[0018] The UV camera is arranged on the outside of the display module.

[0019] Optionally, the mirror display sun visor further includes: a light guide plate;

[0020] The light guide plate is arranged in the light guide groove along the circumferential direction of the light guide groove;

[0021] The atmosphere lights are arranged at both ends of the light guide groove.

[0022] Optionally, the ambient light is arranged on a side wall of the light guide groove along a circumferential direction of the light guide groove.

[0023] The present application provides a mirror display sun visor, comprising a sun visor shell, a display module being provided in the sun visor shell, a display surface of the display module being provided with a mirror structure, the display module comprising liquid crystal glass; a polarizer being provided in the liquid crystal glass so that the display module emits polarized light; the mirror structure comprising a mirror polarizing film; the mirror polarizing film comprising a plurality of film layers, each of which comprises two or more prism structures continuously arranged parallel to the direction of the liquid crystal glass, the polarization angle of the polarized light emitted by the display module being the same as the polarization angle of the mirror polarizing film on the mirror structure.

[0024] Obviously, the present application uses a mirror polarizing film with a prism structure, and the polarization state of the display module and the mirror polarizing film are matched. The polarized light emitted by the display module enters the mirror polarizing film at the Brewster angle, so that the polarized light passes through the mirror polarizing film 100%, avoiding the loss of light energy or ghosting problems such as ordinary mirror reflective films. As for the natural light from the outside, a very small part of it will pass through the loss when it enters the mirror polarizing film at the Brewster angle, but most of it is incident at a non-Brewster angle and is reflected by the prism structure of the mirror polarizing film and concentrated near the vertical direction, thereby enhancing the reflected light. Through this method, the transmittance of the display can reach 100% while the natural light reflectivity can reach more than 80%, thereby achieving a clear and bright mirror display effect; solving the problem of light energy loss and ghosting when the display module is reflected by the mirror glass; reducing the risk of interference when the mirror glass contacts the liquid crystal glass and the failure of the liquid crystal display due to direct external light. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0026] Figure 1 This is an optical principle diagram displayed for an ordinary coated glass mirror;

[0027] Figure 2 A schematic diagram of the position of the mirror polarizing film provided in an embodiment of the present application;

[0028] Figure 3 for Figure 2 A magnified view of the prism structure in the middle mirror polarizing film;

[0029] Figure 4 The refractive index distribution diagram of the mirror polarizing film provided in the embodiment of the present application;

[0030] Figure 5 A top view of the black Mylar sheet provided in an embodiment of the present application;

[0031] Figure 6 A cross-sectional view of a mirror display sun visor provided in an embodiment of the present application;

[0032] Figure 7 A cross-sectional view of another mirror display sun visor provided in an embodiment of the present application;

[0033] Figure 8 This is an optical principle diagram of the mirror polarizing film provided in an embodiment of the present application;

[0034] Figure 9 A front view of a mirror display sun visor provided in an embodiment of the present application;

[0035] Figure 10 A schematic diagram of the installation of a mirror display sun visor in a car provided in an embodiment of the present application;

[0036] Figure 11 A schematic diagram of an atmosphere light arrangement provided in an embodiment of the present application;

[0037] Figure 12 A schematic diagram of another atmosphere light arrangement provided in an embodiment of the present application;

[0038] Figure 13 for Figure 12 a cross-sectional view of the visor shown;

[0039] Figure 14 A schematic diagram of a light guide groove provided in an embodiment of the present application;

[0040] Figure 15 A top view of the diffusion membrane provided in an embodiment of the present application;

[0041] Figure 16 A front view of a diffusion membrane provided in an embodiment of the present application;

[0042] Figure 17 A side view of a diffusion membrane provided in an embodiment of the present application;

[0043] Figure 18 for Figure 12 A top view of the lamp beads in the left light guide groove is shown;

[0044] Figure 19 for Figure 12 The front view of the lamp bead in the left light guide groove is shown;

[0045] Figure 20 for Figure 12 The side view of the lamp bead in the left light guide groove is shown.

[0046] The following are the descriptions of the reference numerals:

[0047] 1-Transparent three-reflective seven-mirror glass; 2-Direct-type LCD backlight module; 3-Display area; 4-Display module; 41-Light guide groove; 42-Ambient light; 421-Yellow lamp beads; 422-White lamp beads; 423-Ultraviolet lamp beads; 43-Diffusion film; 44-UV camera; 5-Black Mylar sheet; 6-Touch module; 71-Mini / Micro LED direct display module; 72-Mini / Micro LED backlight module; 8-Tempered glass; 9-Mirror polarizing film; 91-First film layer; 92-Second film layer; 10-Liquid crystal glass; 11-Reflective film; θ1-Angle of prism structure. DETAILED DESCRIPTION

[0048] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0049] With the rapid development of new energy vehicles, people's demand for intelligent driving has gradually diversified. While pursuing high-quality display, they have also put forward the demand for integrated mirror display and human-computer interaction. Figure 1 For ordinary three-mirror glass 1, ignoring absorption, the energy of reflected and transmitted light within the visible light band is constant. According to the law of conservation of energy, high reflectivity corresponds to low transmittance, which results in high reflection loss and low display brightness. To address the low display brightness, the only solution is to increase the power consumption of the direct-lit LCD backlight module 2. However, this increased power consumption increases the temperature of the direct-lit LCD backlight module 2, making heat dissipation difficult to manage and unable to meet the requirements of in-vehicle use. This poses certain challenges to in-vehicle mirror displays. Furthermore, the sandwich structure formed by the three-mirror glass 1 and the direct-lit LCD backlight module 2 can cause ghosting due to the reflection of light from the direct-lit LCD backlight module 2 by the three-mirror glass 1. Furthermore, when the three-mirror glass 1 contacts the LCD glass of the display module, interference fringes and other problems may occur. In addition, ordinary three-reflective seven-mirror glass 1 used in car displays requires a direct-lit LCD backlight module 2 with higher brightness and higher temperature resistance. Direct sunlight can easily cause the LCD glass crystal to overheat and liquefy, making it impossible to display images.

[0050] Therefore, the present application provides a mirror display sun visor, which can achieve a clear and bright mirror display effect by making the reflectivity and transmittance of the mirror glass reach very high values; at the same time, it solves the problem of light energy loss when the display module is reflected by the mirror glass; solves the ghosting problem; and reduces the risk of interference when the mirror glass contacts the liquid crystal glass and the risk of failure of the liquid crystal display due to direct external light.

[0051] The mirror display visor provided in the embodiment of the present application may include a visor shell, a display module is provided in the visor shell, the display surface of the display module is provided with a mirror structure, and the display module includes a liquid crystal glass 10; a polarizer is provided in the liquid crystal glass 10, so that the display module emits polarized light; the mirror structure includes a mirror polarizing film 9; the mirror polarizing film 9 includes several film layers, and the film layers include two or more prism structures arranged continuously in a direction parallel to the liquid crystal glass 10, and the polarization angle of the polarized light emitted by the display module is the same as the polarization angle of the mirror polarizing film 9 on the mirror structure.

[0052] This embodiment does not limit the specific type of display module. For example, the display module can be an ordinary LED display module, a Mini LED display module, or a Micro LED display module. It should be noted that the current vehicle-mounted display has problems such as low brightness, low color gamut, low contrast, and high power consumption. Mini LED or Micro LED has the characteristics of high brightness, high color gamut, high contrast, low power consumption, and regional dimming. Selecting a Mini LED display module or a Micro LED display module as a display module can achieve a high-brightness, high color gamut, and high-contrast display effect. The use of local dimming technology can reduce the power consumption of the mirror display sun visor.

[0053] This embodiment does not limit the specific type of Mini LED display module. For example, the Mini LED display module can be a Mini LED direct display module and a Mini LED backlight module. This embodiment does not limit the specific type of Micro LED display module. For example, the Micro LED display module can be a Micro LED direct display module and a Micro LED backlight module. It should be noted that the Mini LED direct display module or the Micro LED direct display module uses the Mini LED chip directly as the display pixel point to provide the basic unit of imaging, thereby realizing image display, and is a self-luminous display module. The Mini LED backlight module or the Micro LED backlight module uses Mini LED as the backlight source of the display module, and achieves ultra-high contrast, ultra-high brightness, and ultra-high color gamut image quality performance by arranging a large number of Mini LED chips in the backlight module, and is a non-self-luminous display module.

[0054] Furthermore, the display module of this embodiment may further include a reflective film 11, which is disposed on the surface of the display module facing away from the liquid crystal glass 10. It should be noted that the reflective film can reflect polarized light reflected into the display module outward, allowing the polarized light reflected into the display module to be reused, thereby enhancing the brightness of the module.

[0055] It should be noted that the polarization state of the polarized light (p-polarized light or s-polarized light) emitted by the display module must match the polarization state of the mirror polarizing film 9. This ensures that the polarized light emitted by the display module, incident at the Brewster angle, strikes the inclined surface of the prism structure and is then transmitted through the mirror polarizing film 9. When the polarized light emitted by the display module is s-polarized light, adjusting the prism structure ensures that the s-polarized light can pass through the mirror polarizing film 9.

[0056] It should be noted that the present embodiment can determine the specific value of the Brewster angle based on the Brewster angle calculation formula and the refractive index of the film layer. The present embodiment does not limit the specific value of the angle θ1 of the prism structure, the specific pitch (Pitch) of adjacent prism structures, and the specific height of the prism structure, as long as it is ensured that the polarized light can be incident on the inclined surface of the prism structure with the Brewster angle as the incident angle. It should be noted that the Brewster angle (also called the polarization angle) is the incident angle at which light with a specific polarization is completely transmitted through the transparent dielectric surface without reflection. Please refer to Figure 2 and Figure 3 Polarized light emitted by the display module enters the mirror polarizing film 9 at the Brewster angle, allowing 100% of the polarized light to pass through the film, thus preventing the loss of light energy and ghosting caused by mirror reflection. Regarding external natural light, when natural light enters the mirror polarizing film 9 at the Brewster angle, the light with the same polarization as the display module is 100% transmitted, while the other polarization is reflected by the prism structure. When natural light enters at a non-Brewster angle, it is reflected by the prism structure of the mirror polarizing film 9 and focused near the vertical direction, thereby enhancing the reflected light.

[0057] Furthermore, in order to increase the reflectivity of the mirror polarizing film 9, the mirror polarizing film 9 may include two or more film layers; each film layer includes two or more prism structures arranged continuously parallel to the direction of the liquid crystal glass 10, so that the polarized light is incident on the inclined surface of the prism structure of each layer with the Brewster angle as the incident angle, and is transmitted through the mirror polarizing film 9. Further, in order to increase the reflectivity of the mirror polarizing film 9, the mirror polarizing film 9 in this embodiment may include a first film layer 91 and a second film layer 92, and the first film layer 91 and the second film layer 92 are arranged alternately; the first film layer 91 includes two or more prism structures with a first refractive index arranged continuously parallel to the direction of the liquid crystal glass 10, and the second film layer 92 includes two or more prism structures with a second refractive index arranged continuously parallel to the direction of the liquid crystal glass 10; the first refractive index is greater than the second refractive index, such as Figure 4 It should be noted that this embodiment uses a high refractive index material n H and low refractive index materials L The film layers are arranged alternately and bonded together with a transparent adhesive (such as 3M adhesive). Because the alternating layers of high-refractive-index and low-refractive-index materials cause constructive interference, the reflectivity of the mirror polarizing film 9 can be increased. When natural light from the outside world is incident on the various film layers of the mirror polarizing film 9 at the Brewster angle, it is reflected and refracted by the upper and lower surfaces of each film layer. As the number of reflections increases, the s-polarized light in the reflected light becomes more and more, the light energy increases, and the reflectivity becomes higher. When natural light is incident at a non-Brewster angle, it is reflected and focused near the vertical direction by the prism structure of each film layer, thereby enhancing the reflected light.

[0058] This embodiment does not limit the specific number of film layers; the specific number of film layers can be determined based on the multi-layer film reflectivity formula and the required reflectivity. This embodiment does not limit the specific thickness of the film layers; the specific thickness of the film layers can be determined based on the actual required reflectivity. This embodiment does not limit the specific refractive index of the film layers; the specific refractive index of the film layers can be determined based on the actual required reflectivity.

[0059] It should be noted that the mirror polarizing film 9 in this embodiment can be applied to mirror display products such as sports mirrors, beauty mirrors, VR (Virtual Reality), projectors, etc.

[0060] Furthermore, in this embodiment, the display module may be provided with a touch module 6. The specific location of the touch module 6 is not limited in this embodiment, as long as the touch function can be realized. For example, the touch module 6 may be provided between the liquid crystal glass 10 and the mirror polarizing film 9. It should be noted that current sun visors do not have intelligent interactive functions; by using the touch module 6 in the sun visor, touch human-computer interaction functions can be realized.

[0061] Furthermore, to prevent damage to the display module, the mirrored display visor of this embodiment may also include: glass; a mirrored polarizing film 9 disposed on the surface of the glass near the liquid crystal glass 10. It should be noted that applying the mirrored polarizing film 9 to the glass also provides explosion-proof properties; applying the mirrored polarizing film 9 to the inner surface of the glass also prevents scratches. This embodiment does not limit the specific type of glass, as long as it can provide protection. For example, the glass can be tempered glass 8. Furthermore, the display area 3 can be designed with a translucent area and a non-translucent area according to the product structure. In this embodiment, the surface of the mirrored polarizing film 9 near the liquid crystal glass 10 can be divided into a translucent area and a non-translucent area. The translucent area is used to display the image, while the non-translucent area is provided with a black light-blocking layer. It should be noted that providing a black light-blocking layer in the non-translucent area enhances the reflection of natural light, giving the entire glass surface a good mirrored effect. This embodiment does not limit the specific type of black light-blocking layer; for example, the black light-blocking layer can be black Mylar 5 and / or a dark paint surface. The black Mylar sheet 5 can be attached to the surface of the mirror polarizing film 9 close to the liquid crystal glass 10 ; the dark paint surface can be silk-screened on the surface of the mirror polarizing film 9 close to the liquid crystal glass 10 .

[0062] Please refer to Figures 11 to 20 The mirror display sun visor of this embodiment may further include: a light guide groove 41, an ambient light 42, a diffusion film 43, a controller, and a UV camera 44. The light guide groove 41 is an open annular groove disposed around the outside of the display module 4. The ambient light 42 is disposed within the light guide groove 41 and includes one or more of cool-color lamp beads, warm-color lamp beads, and ultraviolet lamp beads 423. The ultraviolet lamp beads 423 include one or more of UVA lamp beads, UVB lamp beads, and UVC lamp beads. The diffusion film 43 covers the light guide groove 41 along its circumferential direction. The controller is electrically connected to the ambient light 42. The UV camera 44 is disposed outside the display module 4. The UV (Ultraviolet) camera is an ultraviolet camera, and the UVC band (short-wave ultraviolet) wavelength range is 100-280nm, the UVB band (medium-wave ultraviolet) wavelength range is 280-320nm, and the UVA band (long-wave ultraviolet) wavelength range is 320-400nm. The lamp beads can be fixed in the light guide groove 41 by double-sided tape.

[0063] This embodiment, on the one hand, flexibly adjusts the color temperature of the ambient light 42 by providing cool and warm lamp beads and adjusting the cool and warm lamp beads on and off via a controller. On the other hand, by providing UVA, UVB, and UVC lamp beads in conjunction with a UV camera 44 and adjusting the UVA, UVB, and UVC lamp beads on and off via a controller, it can be used to detect whether sunscreen is evenly applied to the face in different UV bands. Furthermore, the provision of a diffusion film 43 can atomize the light emitted by the lamp beads, making the light more uniform and softer.

[0064] It should be noted that the position of the lamp beads and the position of the UV camera 44 need to be transparent, so when designing the transparent area and the non-transparent area, the position of the lamp beads and the position of the UV camera 44 also need to be considered, such as Figure 5 shown.

[0065] The embodiment does not limit the specific position of the atmosphere light 42 in the light guide groove 41. For example, the atmosphere light 42 may be arranged at both ends of the light guide groove 41. Figure 11 As shown; accordingly, the mirror display visor further includes: a light guide plate; the light guide plate is arranged in the light guide groove 41 along the circumferential direction of the light guide groove 41; it can also be an atmosphere light 42 arranged on the side wall of the light guide groove 41 along the circumferential direction of the light guide groove 41, such as Figure 12 It should be noted that the lamp beads in this embodiment are side-entry lamp beads. The former uses the light guide plate to guide light to achieve light emission on the surface where the light guide slot 41 is located; the latter uses the air in the light guide slot 41 to achieve light emission on the surface where the light guide slot 41 is located.

[0066] It should be noted that, in this embodiment, the ultraviolet lamp bead 423 may be directly disposed next to the UV camera 44 in addition to being disposed in the light guide groove 41 .

[0067] This embodiment does not limit the specific arrangement of the cool color lamp beads, warm color lamp beads and ultraviolet lamp beads 423. For example, the cool color lamp beads and the warm color lamp beads can be arranged alternately; the ultraviolet lamp beads 423 are arranged below the cool color lamp beads and the warm color lamp beads, such as Figure 16 As shown; cool-color lamp beads, warm-color lamp beads, and ultraviolet lamp beads 423 can also be arranged alternately. This embodiment does not limit the specific types of cool-color lamp beads or warm-color lamp beads, as long as the cool-color lamp beads are lamp beads with a cool color temperature and the warm-color lamp beads are lamp beads with a warm color temperature. For example, the cool-color lamp beads can be yellow lamp beads 421 with a color temperature of 3000K, and the warm-color lamp beads can be white lamp beads 422 with a color temperature of 6500K. This embodiment does not limit the specific number of cool-color lamp beads, warm-color lamp beads, and ultraviolet lamp beads 423, and the specific number of cool-color lamp beads, warm-color lamp beads, and ultraviolet lamp beads 423 can be determined based on actual conditions.

[0068] This embodiment does not limit the specific dimensions of the diffusion film 43, as long as it completely covers the opening of the light guide slot 41. This embodiment does not limit the specific location of the UV camera 44; the UV camera 44 can be located above or below the display module 4. Furthermore, the UV camera 44 can be located midway between the two ends of the light guide slot 41.

[0069] Based on the above embodiment, the present application uses a mirror polarizing film 9 with a prism structure. The polarization state of the display module matches that of the mirror polarizing film 9. The polarized light emitted by the display module enters the mirror polarizing film 9 at the Brewster angle, so that 100% of the polarized light passes through the mirror polarizing film 9, avoiding the loss of light energy or ghosting problems such as ordinary mirror reflective films. For external natural light, a very small portion of it will be lost when it enters the mirror polarizing film 9 at the Brewster angle, but most of it is incident at a non-Brewster angle and is reflected by the prism structure of the mirror polarizing film 9 and concentrated near the vertical direction, thereby enhancing the reflected light. Through this method, the display transmittance can reach 100% while the natural light reflectivity can reach more than 80%, thereby achieving a clear and bright mirror display effect; solve the problem of light energy loss and ghosting when the display module is reflected by the mirror glass; and reduce the risk of interference when the mirror glass contacts the liquid crystal glass 10 and the risk of failure of the liquid crystal display due to direct external light.

[0070] Please refer to Figure 6 、 Figure 7 、 Figure 9 and Figure 10 , Figure 6 A cross-sectional view of a mirror display sun visor provided in an embodiment of the present application; Figure 7 A cross-sectional view of another mirror display sun visor provided in an embodiment of the present application; Figure 9 A front view of a mirror display sun visor provided in an embodiment of the present application; Figure 10 A schematic diagram of the installation of a mirror display sun visor in a vehicle provided in an embodiment of the present application, wherein the mirror display sun visor may include a sun visor housing, a display module disposed within the sun visor housing, and a display surface of the display module being provided with a touch module 6 and a mirror structure;

[0071] The display module includes a liquid crystal glass 10; the display module is a Mini / Micro LED direct display module 71 (or a Mini / Micro LED backlight module 72) and a reflective film 11; a polarizer is provided in the liquid crystal glass 10;

[0072] The mirror structure includes tempered glass 8, mirror polarizing film 9 and black Mylar sheet 5;

[0073] The mirror polarizing film 9 includes a first film layer 91 and a second film layer 92, and the first film layer 91 and the second film layer 92 are arranged alternately; the first film layer 91 includes two or more prism structures with a first refractive index arranged continuously in a direction parallel to the liquid crystal glass 10, and the second film layer 92 includes two or more prism structures with a second refractive index arranged continuously in a direction parallel to the liquid crystal glass 10; the first refractive index is greater than the second refractive index.

[0074] Based on the above embodiments, the present application alternately coats high and low refractive index film materials, adjusting the film thickness and number of layers to produce a polarized beam splitter film layer. The polarization state of the display module is adjusted to match the polarization state of the mirror polarizing film 9, so that the polarized light emitted by the display module enters the mirror glass at the Brewster angle, allowing 100% of the polarized light to pass through, thereby avoiding the loss of light energy and ghosting caused by mirror reflection. Because natural light is mixed polarized light, when the incident angle does not meet the Brewster angle, most of the light incident on the mirror glass is reflected, achieving a high reflectivity. This method can achieve very high values ​​for both the reflectivity and transmittance of the mirror glass, achieving a clear and bright mirror display effect. At the same time, because the film layer has a high reflectivity for natural light, it can reflect most of the external light, preventing it from directly hitting the liquid crystal glass 10, causing the temperature to rise and the liquid crystal display to fail. Furthermore, the risk of interference between the mirror glass and the liquid crystal glass 10 when in contact is reduced.

[0075] The following is an optical principle diagram to illustrate the working principle of the mirror display sun visor. Please refer to Figure 8 , Figure 8 This is an optical principle diagram of the mirror polarizing film provided in an embodiment of the present application. The working principle of the mirror display sun visor is as follows:

[0076] A mirror polarizing film 9 with a prism structure is used to match the polarization state of the display module (p-polarized light is used as an example below) with the polarization state of the mirror polarizing film 9, so that the p-polarized light emitted by the Mini / Micro LED backlight module 72 enters the mirror glass at the Brewster angle. The p-polarized light passes 100% and avoids the loss of light energy due to mirror reflection.

[0077] For external natural light (mixed polarized light), when the incident angle does not meet the Brewster angle, the reflected light of the incident light will be focused in the vertical direction by the prism structure in the mirror polarizing film 9, thereby increasing the energy of the light; the s-polarized light in the refracted light will be reflected back to the film layer by the liquid crystal glass 10 (due to the presence of a polarizer, only p-polarized light is allowed to pass through), and the energy is reused to enhance the reflectivity; after the p-polarized light in the refracted light passes through the liquid crystal glass 10, it will be reflected by the reflective film 11 at the bottom of the Mini / Micro LED backlight module 72, and the energy is reused to enhance the brightness of the module.

[0078] When natural light is incident at the Brewster angle (due to angle limitations, this part of light is less), the polarized light (p-polarized light) with the same polarization as the display module will pass 100%, and after entering the Mini / Micro LED backlight module 72, it will be reflected by the reflective film 11, and the energy will be reused to enhance the brightness of the module; the s-polarized light will be reflected by the prism structure, and the transmission and reflection of multiple film layers in the mirror polarizing film 9 will enhance the transmittance and reflectivity.

[0079] This method can make the reflectivity and transmittance of the mirror glass reach very high values, meeting the requirements of clear and bright mirror display effects.

[0080] The principles and implementation methods of the present application are described herein using specific examples, and the various embodiments are in a progressive relationship. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other. The description of the above embodiments is only used to help understand the method and core ideas of the present application. For those of ordinary skill in the art, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

[0081] It should also be noted that, in this specification, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

Claims

1. A mirror display sun visor, comprising a sun visor housing, a display module disposed within the sun visor housing, and a display surface of the display module provided with a mirror structure, characterized in that: The display module includes liquid crystal glass; a polarizer is provided in the liquid crystal glass to enable the display module to emit polarized light; The mirror structure includes a mirror polarizing film; the mirror polarizing film includes two or more film layers; each of the film layers includes two or more prism structures arranged continuously parallel to the direction of the liquid crystal glass, so that the polarized light is incident on the inclined surface of the prism structure of each layer with the Brewster angle as the incident angle, and is transmitted out through the mirror polarizing film; when natural light is incident at a non-Brewster angle, it will be reflected by the prism structure of the mirror polarizing film and concentrated near the vertical direction; the polarization angle of the polarized light emitted by the display module is the same as the polarization angle of the mirror polarizing film on the mirror structure.

2. The mirror display sun visor according to claim 1, characterized in that: The mirror polarizing film includes a first film layer and a second film layer, and the first film layer and the second film layer are arranged alternately; the first film layer includes two or more prism structures with a first refractive index arranged continuously parallel to the direction of the liquid crystal glass, and the second film layer includes two or more prism structures with a second refractive index arranged continuously parallel to the direction of the liquid crystal glass; the first refractive index is greater than the second refractive index.

3. The mirror display sun visor according to claim 1, characterized in that: The display module is a common LED display module, a Mini LED display module, or a Micro LED display module, and a touch module is provided on the display module.

4. The mirror display sun visor according to claim 1, characterized in that: The display module further includes a reflective film; the reflective film is arranged on a surface of the display module away from the liquid crystal glass.

5. The mirror display sun visor according to claim 1, characterized in that: Also includes: Glass; the mirror polarizing film is arranged on the surface of the glass close to the liquid crystal glass, and the glass includes tempered glass.

6. The mirror display sun visor according to claim 1, characterized in that: The surface of the mirror polarizing film close to the liquid crystal glass is divided into a light-transmitting area and a non-light-transmitting area; the light-transmitting area is used to display images; the non-light-transmitting area is provided with a black shading layer, and the black shading layer includes black Mylar and / or dark paint.

7. The mirror display sun visor according to claim 1, characterized in that: Also includes: Light guide, ambient light, diffusion film, controller and UV camera; The light guide groove is an open annular groove arranged around the outer side of the display module; The atmosphere lamp is arranged in the light guide groove, and the atmosphere lamp includes one or more of cool color lamp beads, warm color lamp beads and ultraviolet lamp beads; the ultraviolet lamp beads include one or more of UVA lamp beads, UVB lamp beads and UVC lamp beads; The diffusion film covers the light guide groove along the circumferential direction of the light guide groove; The controller is electrically connected to the atmosphere lamp; The UV camera is arranged on the outside of the display module.

8. The mirror display sun visor according to claim 7, characterized in that: Also includes: Light guide plate; The light guide plate is arranged in the light guide groove along the circumferential direction of the light guide groove; The atmosphere lights are arranged at both ends of the light guide groove.

9. The mirror display sun visor according to claim 7, characterized in that: The ambient light is arranged on the side wall of the light guide groove along the circumferential direction of the light guide groove.

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