Embedded glass plate

Abstract

The present invention relates to an embedded glass sheet separating an interior from an external environment, comprising a reflective film having a ramp profile, to an HUD system comprising said embedded glass sheet, and to the use of a ramp profile on an embedded glass sheet.

Description

Technical Field

[0001] The present invention relates to an embedded glass panel that separates an internal space from an external environment, the embedded glass panel including a reflective film having a ramp profile, to a HUD system including the embedded glass panel, and to the use of the ramp profile on the embedded glass panel. Background Art

[0002] Embedded glass panels suitable for the reflection of projected images are constantly improving and expanding in terms of performance and application fields, at least in transportation applications, especially when an HUD function is required.

[0003] Reflection coating techniques obtained by depositing metals and / or dielectric layers on a glass or plastic substrate by chemical vapor deposition or physical vapor deposition make it possible to obtain various reflection properties, such as, at Brewster's angle, a reflection of p-polarized light higher than 10%. These coatings can be applied on the surface of the embedded glass panel or within the embedded glass panel, specifically within a laminated embedded glass panel. These coatings are well known to those skilled in the art and have clear advantages in terms of quality, processing convenience, and performance, the main drawback being only the cost. When only an area of the surface of the embedded glass panel requires a reflective coating, the deposition of the coating can be selective in that area, or the fully deposited coating can be stripped (removed). Both of these operations involve material waste, process complexity, and increased costs.

[0004] The technology of reflective films also gives good reflection properties on the embedded glass panel. Similarly, these reflective films are known to those skilled in the art. Although these films have a reflection property of p-polarized light higher than 15% at Brewster's angle, they are still difficult to attach to the surface of the embedded glass panel.

[0005] When the embedded glass panel is a laminated embedded glass panel, the reflective film can be applied within the embedded glass panel. In fact, in these cases, the reflective film can be inserted into the laminated thermoplastic material. Due to the corrugations or wrinkles in the film, these cases lead to some drawbacks of double images or optical defects, or lead to difficulties related to smooth stretching and position, as well as difficulties related to the forming (bending and forming) of the laminate.

[0006] In other cases, the reflective film can be attached to the inner surface of the embedded glass panel. These cases lead to similar drawbacks. When the reflective film is attached to the entire surface of the embedded glass panel, wrinkles, corrugations, and forming problems may result in an unaesthetic appearance. However, when the film is only attached to a partial area of the entire surface of the embedded glass panel, the cost and corrugation / wrinkle drawbacks are reduced, but the edges of that area may be visible, which, in addition to being unaesthetic, may also result in dust trapping, poor adhesion, such that it may be damaged, scratched, and / or removed. Summary of the Invention

[0007] The present invention aims to overcome the above disadvantages by providing a flush-mounted glass panel that separates the internal space from the external environment, the flush-mounted glass panel having an inner surface facing the internal space and an outer surface facing the external environment, wherein the inner surface is provided with a reflective film having a perimeter in at least one region, characterized in that the reflective film has a ramp profile along at least a part of its perimeter. The reflective film itself provides a high reflectivity for p-polarized radiation, whether projected from a p-polarized light source or from a mixed light source, and allows for a color-neutral display.

[0008] By masking the ends of the film, the specific ramp profile helps to provide effective positioning and also helps to reduce edge defects that cause dust trapping and / or adhesion problems at the edges of the reflective film. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a schematic view of the ramp profile of the present invention.

[0010] Figure 2 is a schematic view of a first embodiment of the present invention.

[0011] Figure 3 is a schematic view of a second embodiment of the present invention.

[0012] Figure 4a and Figure 4b are schematic views of a third embodiment of the present invention, a side view and a perspective view respectively.

[0013] Figure 5a and Figure 5b are schematic views of a fourth embodiment of the present invention, a side view and a perspective view respectively.

[0014] These figures are not to scale.

[0015] This flush-mounted glass panel thus serves to define an internal space from the external environment. The internal space can be a room or a defined space that must be separated from the external environment. In a preferred embodiment, the internal space is the interior of a vehicle.

[0016] The inner surface of the flush-mounted glass panel is thus the surface facing the internal space, while the outer surface faces the external environment.

[0017] The flush-mounted glass panel can be a single sheet of glass or polymer, or can be a laminate of glass and / or polymer materials.

[0018] Examples of glass sheets include float glass sheets or alternatively cast or drawn glass sheets, and can be selected from all glass technologies, such as: float clear, extra-clear or tinted glass, (partially) acid-etched or (partially) sandblasted glass, and combinations thereof. It can be any composition with any optical properties, such as any value of visible light transmittance, ultraviolet transmittance, infrared transmittance, and / or total solar transmittance. The glass can be soda-lime silicate glass, aluminosilicate glass, E-glass, borosilicate glass, etc. The glass can be a normal clear, tinted or extra-clear (i.e., lower Fe content and higher transmittance) glass substrate. Further examples of glass substrates include clear, green, bronze or blue-green glass substrates.

[0019] Examples of polymer material sheets include poly(methyl)methacrylate (PMMA), polycarbonate, polyethylene terephthalate (PET), polyolefins, polyvinyl chloride (PVC), or mixtures thereof.

[0020] Preferred glazing glass plates are generally glass plates that can be used to provide vehicle glazing.

[0021] The glass can be clear, extra-clear, or tinted. These glass types are defined by their respective compositions. The composition can be selected from various types of glass compositions, provided that the present invention is not impaired.

[0022] The glass can be annealed, tempered or heat-strengthened glass.

[0023] Preferably, when the glazing glass plate is a laminate, it can include at least two glass sheets and at least one intermediate layer or interlayer.

[0024] The interlayer or intermediate layer or laminating material can be selected from the group consisting of: ethylene vinyl acetate (EVA), polyisobutylene (PIB), polyacetals (such as polyvinyl butyral (PVB)), polyurethanes (PU), polyvinyl chloride (PVC), polyesters, cycloolefin polymers (COP), ionomers, and / or ultraviolet curable adhesives and other adhesives known in the field of manufacturing glass laminates. Blend materials using any compatible combination of these materials can also be applicable. Preferably, the interlayer includes a material selected from the group consisting of ethylene vinyl acetate and / or polyvinyl butyral.

[0025] The polymer interlayer also serves as a "bonding interlayer" because the interlayer and the glass sheets form a bond that results in adhesion between the glass sheets and the interlayer.

[0026] The interlayer used in the present invention can be a transparent or translucent polymer interlayer. However, for specific applications where transparency is not required, the polymer interlayer can be colored or patterned. The colored interlayer can have a light transmittance of 0% to 85%, and can be selected according to the requirements of the area used as the projection area in the HUD system.

[0027] The typical thickness of the interlayer is from 0.15 mm to 3.5 mm, preferably from 0.30 mm to 1.75 mm, more preferably from 0.5 mm to 1.75 mm. Commercially available polymer films are polyvinyl butyral (PVB) layers of 0.38 mm and 0.76 mm, 1.52 mm, 2.28 mm and 3.04 mm. To achieve the desired thickness, one or more of these films can be used.

[0028] Enhanced sound insulation can be provided by using specific interlayers known in the field of laminated glass.

[0029] The interlayer can have a substantially constant thickness (except for any surface roughness conventional in the art), or it can be a so-called wedge film and thus have a varying thickness on its surface.

[0030] When considering a laminated glass panel including two glass sheets, the first sheet and the second sheet can independently have a thickness ranging from 0.2 mm to about 15 mm, alternatively from 0.5 mm to about 10 mm, alternatively from 0.5 mm to about 8 mm, alternatively from 0.5 mm to about 6 mm. Specifically, in the automotive field, the first sheet and the second sheet can independently have a thickness ranging from 0.2 mm to 6 mm, alternatively from 0.4 mm to 3 mm.

[0031] The two sheets can have the same thickness, such as 0.5 mm, or 0.8 mm, or 1.2 mm, or 1.6 mm, or 1.8 mm, or 2.1 mm, or 3 mm. Such a symmetric structure in terms of glass thickness allows ease of the lamination process and conventional shaping.

[0032] The two sheets can also have different thicknesses, thus providing an asymmetric laminated glass, regardless of the position facing inside or outside. For example, plate 1 = 0.5 mm and plate 2 = 2.1 mm, or plate 1 = 0.8 mm and plate 2 = 2.1 mm, or plate 1 = 0.5 mm and plate 2 = 1.6 mm, or plate 1 = 0.8 mm and plate 2 = 1.6 mm, or plate 1 = 1.6 mm and plate 2 = 2.1 mm. Such an asymmetric structure in terms of glass thickness allows flexibility in terms of curvature and / or weight management and / or flexibility in terms of light / sunlight modulation.

[0033] In a specific case, the thickness of the outer sheet of a suitable asymmetrically laminated and installed glass can be greater than the thickness of the inner sheet, for example: outer plate = 2.1 mm and inner plate = 0.5 mm, such that a compromise can be made between a lighter weight and better mechanical resistance.

[0034] The reflective film of the present invention is suitable for reflecting p-polarized radiation at an incident angle of 50° to 75°, or at an angle of 55° to 70° (i.e., within an angular range including the Brewster angle (57°)). However, the present invention can also be applicable to a reflective film designed to reflect hybrid reflection (s-polarized and p-polarized) or s-polarized reflection of a suitable projector.

[0035] In terms of reflecting a projected image in a HUD system, such a reflective film is specifically designed to reflect p-polarized radiation.

[0036] Typically, a clear glass plate has a p-polarized light reflectance (Rppol) of 1% at an angle of 65°, a p-polarized light reflectance (Rppol) of 0% at an angle of 57° (Brewster), and an s-polarized light reflectance (Rspol) = 35% at an angle of 65°.

[0037] A preferred reflective film typically has a reflectance of p-polarized light ≥ 18%, preferably ≥ 20% at the Brewster angle.

[0038] A suitable preferred reflective film can have a p-polarized light reflectance (Rppol) of 26% at an angle of 65°; and an s-polarized light reflectance (Rspol) = 40% at an angle of 65°.

[0039] The reflective film is preferably disposed in a defined area on the inner surface of the installed glass plate, and the defined area is defined according to the potential display area targeted by a projector of a potential HUD. The defined area thus has any surface area size, such as from having from 2 cm 2 , alternatively 4 cm 2 , alternatively 8 cm 2 , alternatively 10 cm 2 . The defined area can be up to 4 m 2 , alternatively up to 2.5 m 2 , alternatively up to 1 m 2 , alternatively up to 0.5 m 2 .

[0040] The area of the installed glass plate where the reflective film can be attached can have any light transmittance value, where TL is typically measured according to ISO9050 under the conditions of using Illuminant A and an observer aperture angle of 2° ( = Ill.A, 2°).

[0041] The periphery of the reflective film may have n edges, where n ≥ 1, to define a circular, oval, triangular, square, rectangular, trapezoidal, or any other suitable shape.

[0042] Examples of the reflective film include: a film including at least one transparent liquid crystal layer; a film including at least one cholesteric liquid crystal layer; a film including a plurality of alternating polymer interference layers, etc.

[0043] Such layers and coatings (also referred to as p-pol reflective films) are known. If other light / radiation is to be reflected, the film can be appropriately selected for s-polarized light or mixed polarized light.

[0044] The reflective film can be applied to the surface side facing the interior of the vehicle of the laminated glass panel.

[0045] For example, a reflective film including a liquid crystal layer can be bonded to the surface of the laminated glass panel as a functional foil. In this case, the corresponding liquid crystal layer is applied as a coating to a carrier foil made of, for example, cellulose triacetate (TAC), polyethylene terephthalate (PET), polyethylene (PE), polyamide (PA), or other conventional polymer materials. High-precision coating processes for manufacturing such functional liquid crystal films are available and known in the art, and the functional films are commercially available. Advantageously, the foil can be applied to the interior-facing surface of the laminated glass panel at any time, which surface is intended to be used as a projection surface.

[0046] Commercial examples of such reflective films include the windshield composite film available from 3M under the trade name or the reflective film available from Toray under the trade name or the reflective film available from Fujifilm under the trade name available.

[0047] When the reflective film needs to be applied in the transparent area of the laminated glass panel that can be used as a vehicle windshield, the reflective film can have a light transmittance of ≥ 60% or even ≥ 70%. However, the advantage of this technical solution is that when the reflective film is to be attached to the shielding area of the laminated glass panel, the reflective film can have any light transmittance from 0% to 92%, and the shielding area has TL ≤ 30%.

[0048] Any known adhesion means (such as an optically clear resin, etc.) can be used to apply the reflective film to the laminated glass panel.

[0049] Suitable optically clear resins have a refractive index of about 1.4 - 1.6. Examples of optically clear resins include acrylic resins, methacrylate resins, urethane resins, silicone resins, polyester resins, epoxy resins, and polysulfide resins.

[0050] Such optically clear resins are, for example, thermosetting, high elongation silicone gels. The optically clear resin preferably cures into a soft, viscous gel at a temperature below 70 °C over a period of 25 to 30 minutes. The optically clear resin can also be a pressure-sensitive adhesive, or any curable resin.

[0051] The applications of such optically clear resins are well known in the art.

[0052] The transparency of the optically clear resin is >90%, preferably >95%, more preferably 99%. Thus, if desired, the transmittance of the laminated glass plate can be maintained.

[0053] In a first case, at least one region provided with a reflective film can have an initial light transmittance ≥60% (Ill.A, 2°), i.e., the reflective film can be attached to a transparent region of the laminated glass plate, i.e., a region of the laminated glass plate that has a TL ≥60%, preferably ≥70% before the reflective film can be attached. The advantage of this is that the display region can be within the line of sight of the observer to whom the projected information is directed. The advantage is that the observer then sees the projected image in an overlapping region of the field of view outside the laminated glass plate. In this first case, the reflective film can therefore preferably have a high transmittance in the visible spectral range and allow for color-neutral display, specifically, if the reflective film is located in a region of the laminated glass plate having a TL ≥60%.

[0054] In the automotive field, and specifically in the field of windshields, the regulation ECE-R43 stipulates the technical requirement that the central field of view of a vehicle must have a high light transmittance (typically greater than 70%). In this first case, the reflective film must therefore meet the transparency conditions according to the regulation ECE-R43.

[0055] In a second case, at least one region provided with a reflective film can have an initial light transmittance ≤30% (Ill.A, 2°), i.e., the reflective film can be attached to a non-transparent region of the laminated glass plate, i.e., a region of the laminated glass plate that has a TL ≤30%, preferably ≤15% before the reflective film can be attached. In these cases, the advantage is that the projected image is outside the observer's viewing area. The quality and color of the reflective film can then be adjusted, and fewer technical and chemical constraints are required in terms of transparency and color neutrality. On the other hand, the reflective film is therefore also invisible or imperceptible from the outside of the laminated glass plate. Further, the reflectance of an image from a region with a darker background is usually brighter. Another advantage is that the reflective film is protected from direct sunlight and the risk of damage or scratching is reduced, since the shaded region is typically on the periphery of the laminated glass plate and is less accessible to the driver or vehicle occupant.

[0056] Examples of means for obscuring an inset glass pane having TL ≤ 30% include dark prints, dark inserts, dark patches, or combinations thereof.

[0057] Dark prints include enamels and paints, applied by screen printing or typical methods for depositing enamels and paints. Dark inserts include tinted interlayers that are inserted within the interlayer used to provide a laminated inset glass pane or between a reflective film and the inner surface of the inset glass pane, where it can serve as an adhesion means for the reflective film. Dark patches can be provided by laminating a glass sheet to the inset glass pane using an interlayer (such as those described above), with either the interlayer or the glass sheet or a combination thereof having TL ≤ 30%.

[0058] It is also possible that the reflective film overlaps both regions of the inset glass pane having TL ≥ 60% and TL ≤ 30%, thereby bridging regions of the inset glass pane having two different light transmittances.

[0059] However, in both the first and second cases, alone or in combination, the reflective film must be smooth and flat. This ramp profile has the advantages of making the peripheral edge(s) smoother, such that the inner side of the inset glass pane does not have an unsightly appearance of the reflective film and such that dust does not remain stuck on the edge(s) of the reflective film. Further, the reflective film cannot be easily removed by mechanical means (such as scratching) or cleaning actions.

[0060] The ramp profile is provided along at least a portion of at least one edge of the periphery of the reflective film. In some embodiments, the ramp profile is provided on an upper portion of at least one edge of the periphery of the reflective film or on a portion of the upper edge of the periphery of the reflective film.

[0061] Typically, the inset glass pane can be inserted into a frame by fastening means (such as a sealant) to attach the inset glass pane to an interior space.

[0062] In some embodiments, at least a first portion of the periphery will be visible for an interior view, while a second portion can be hidden within the vehicle body or within the side of the inset glass pane within the fastening element (as shown in FIG. 4).

[0063] In other embodiments, the ramp profile can be part of an instrument panel that is designed such that it includes an opening that includes a reflective film attached to the inset glass pane such that projection can occur on a selected area of the windshield. In this case, any portion of the periphery is not effectively visible for an interior view due to being hidden within the instrument panel design that covers the periphery (as shown in FIG. 5).

[0064] In some other embodiments, a ramp profile is provided along all edges of the perimeter of the reflective film. The final aesthetics and positioning will determine the portion of the perimeter where the ramp profile is to be provided.

[0065] As Figure 1 represented, the ramp profile includes at least a notch, the thickness (t) of which corresponds to the thickness of the reflective film, ranging from 0.01 mm to 1.00 mm, alternatively from 0.02 mm to 0.25 mm.

[0066] As Figure 1 shown, the ramp profile further independently includes a width (w) and a height (h) ranging from 0.4 mm to 30.0 mm, alternatively from 1.0 mm to 20.0 mm.

[0067] In Figure 1 it, the ramp profile is illustrated as having a circular (semicircular) cross-section, but technically, it can present any other cross-section as a function of the best fit design and technical requirements. There are various options for protruding or smooth designs, provided that the ramp profile serves the function of hiding at least a portion of the perimeter edge of the reflective film.

[0068] The ramp profile can be made of a polymer, preferably a thermoplastic polymer or a thermoplastic elastomer, such as by extrusion or injection molding processes. Both methods allow for the production of a continuous and uniform shape that conforms to the desired design. The ramp profile can be clear or transparent or colored, as is typical for these types of materials.

[0069] Examples of such materials include polyethylene terephthalate (PET), polyurethane resin, polyethylene, polypropylene, polystyrene, polyvinyl chloride (PVC), acrylonitrile butadiene styrene (ABS), thermoplastic elastomer (TPE), polyisobutylene, silicone, acrylic resin, cyanoacrylate, epoxy resin, polyamide, ethylene vinyl acetate, polysulfide, butyl rubber, ethylene propylene copolymer, styrene butadiene rubber, and their mixtures or combinations. These materials can be from biological sources (bio-based), recycled sources, or chemical sources.

[0070] In some cases, the ramp profile can thus be an optically clear resin, especially when the ramp profile is visible to the occupants. This has the advantage of less interference with the line of sight and a visually appealing surface for the installed glass panel.

[0071] In other cases, when the ramp profile is an element of the dashboard, the ramp profile can have the same color and material as the dashboard and is thus colored and opaque (such as typical AVO materials). This has the advantage that the element looks aesthetically and structurally pleasing as an element of the interior design.

[0072] The ramp profile can be self - adhesive, or it can be attached to the inset glass pane via a separate adhesive or via a primer. The adhesive can also be transparent, as required by the design.

[0073] Examples of adhesives include cyanoacrylates, epoxies, silicone adhesives, and their mixtures or combinations. These adhesives have the advantages of being transparent, high - temperature resistant, waterproof, and having high strength.

[0074] The ramp profile can be opaque, colored, transparent, or translucent.

[0075] The inset glass pane of the present invention can further include an IR - reflective coating. In such cases, and compatible with the present invention, the inset glass pane is a laminated inset glass pane including two glass sheets and at least one interlayer. The IR - reflective coating can be present between the two glass sheets, or on the surface of at least one glass sheet, where it can be provided on the surface of the glass sheet designated as P2 or P3 by chemical vapor deposition or physical vapor deposition, or within the interlayer connecting the two glass sheets, such as a PET - based solar - control window film having an infrared - absorbing or - reflecting ceramic coating. Such IR - reflective coatings are well - known in the art for providing sunlight control and / or heating functions to the inset glass pane.

[0076] In some cases, the IR - reflective coating can be removed for an IR camera or an optical system, such as LIDAR different from the HUD projector of the present invention.

[0077] To avoid double images from the IR - reflective coating, it may be useful to avoid the overlap of the IR - reflective coating with the reflective film for a head - up display.

[0078] Specifically, the inset glass pane can be provided with an IR - reflective coating in the area of the inset glass pane where TL>70%, and the reflective film can be provided in the area of the inset glass pane where TL≤30%. In this way, TTS (total transmitted solar) can be optimized to a value less than 60%, alternatively less than 55%, without compromising the function of the polarized - light - reflective film discussed above. In this case, the edge of the IR - reflective coating can be hidden by the ramp profile to avoid any visible aesthetic change between the area provided with the IR - reflective coating and the area without the IR - reflective coating (the coating can be de - coated).

[0079] The laminate can be produced by methods known per se. Typically, the outer plates, inner plates, and the intermediate layers are stacked flat against each other. The surface of the outer plate facing the interlayer or the surface of the outer plate facing the interlayer can be provided completely or partially with an IR-reflective coating, as described above. In some cases, the IR-reflective coating is present within the interlayer. The reflective film can be positioned and arranged on the surface of the inner plate opposite the interlayer, facing the interior of the vehicle (referred to as surface P4 in laminated installed glass).

[0080] The outer plate and the inner plate are laminated to each other by the interlayer, for example, by an autoclave process, a vacuum bag process, a vacuum ring process, a calendering process, a vacuum laminator, or a combination thereof. The outer plate and the inner plate are typically joined under the action of heat, vacuum, and / or pressure.

[0081] The installed glass plate of the present invention can be used as a windshield, a roof, a cockpit, side lights, a backlight, etc. in vehicle applications, or as a curtain wall, a window, a store display, a refrigerator door, etc. in building applications.

[0082] Vehicles include land vehicles, marine vehicles, aircraft, or spacecraft.

[0083] The present invention also relates to a HUD system, which includes the installed glass plate described herein and at least one projector that emits radiation, wherein the area of the inner plate provided with the reflective film is a display area for projecting an image by the at least one projector.

[0084] In such a HUD system, the projector is directed towards the HUD area such that the projected image is reflected within the display area. Therefore, the radiation of the projector irradiating the windshield is reflected towards the area where the viewer (driver) can see, thereby generating an image or a virtual image (stereogram) behind the windshield that the viewer can see from the inside. The area of the windshield that can be irradiated by the projector can be referred to as the HUD area.

[0085] Such projectors are typically known in the art and will not be described herein.

[0086] Generally, current HUD projectors mainly operate with s-polarized radiation and irradiate the windshield at an incident angle of approximately 65°. The problem that occurs is that the projector image is reflected on the two outer surfaces of the windshield (the air / glass interfaces called P1 and P4). Therefore, in addition to the desired main image, a slightly offset secondary image, namely the so-called ghost image ("ghost"), appears. Different means can be used to mitigate this problem, such as a wedge-shaped interlayer or a reflective film. Another means of mitigating this problem is to reduce the transmitted radiation towards the outer glass sheet by having a HUD area with TL < 30%.

[0087] Within the scope of the present invention, the radiation beam from the projector can be 20% to 100% p-polarized light. Thus, the image formed by the projection beam of the HUD projector can include a mixed light polarization, wherein the percentage of p-polarized light is at least 20%, preferably at least 50%, more preferably at least 75%, even more preferably at least 90%, and most preferably 100%.

[0088] Therefore, the radiation provided by the projector can be advantageously reflected by the reflective film, especially when TL≥70% in the HUD area. When the HUD area is in the area where TL<30% of the embedded glass plate, the criticality of the proportion of non-p-polarized light is less, because the projected image will not transmit or reflect through the external air-glass surface. An additional advantage of working with a p-polarized light beam is the compatibility of the image or virtual image with polarized sunglasses.

[0089] The radiation from the projector impinges on the display area provided with the reflective film at an incident angle of 50° to 75°.

[0090] The present invention finally relates to the use of a ramp profile for fastening at least a part of the periphery of the reflective film, the reflective film being attached to the inner surface of an embedded glass plate that separates the internal space from the external environment, the embedded glass plate having an inner surface facing the internal space and an outer surface facing the external environment, and the ramp profile being positioned along at least a part of the periphery of the reflective film.

[0091] The present invention is illustrated by the following embodiments that are compatible with each other.

[0092] Figure 2 A cross-section of an embedded glass plate (201) is shown, which includes an inner surface (202) and a reflective film (203), the reflective film having 4 edges attached to the inner surface. The periphery of the reflective film has 4 edges: a lower edge (203L), an upper edge (203U); and a right edge and a left edge (not shown). Figure 2 The area of the embedded glass plate (201) provided with the reflective film (203) has TL≥70%. A ramp profile (204L) is attached to the lower edge (203L), and a ramp profile (204U) is attached to the upper edge (203U). Ramp profiles can also be present on each of the right edge and the left edge (not shown).

[0093] Figure 3 Shows similar to Figure 2Cross-section of the flush-mounted glass pane (301), which includes an inner surface (302) and a reflective film (303), wherein the defined area of the shielding area of the flush-mounted glass pane (301) is provided with the reflective film (303), and the shielding area has TL ≤ 30%. The area is provided with shielding means (305) such as those discussed above, for example enamel or paint. The area can be the black band area of the flush-mounted glass pane or any shielding area. A ramp profile (304L) is attached to the lower edge (303L), and a ramp profile (304U) is attached to the upper edge (303U). Ramp profiles can also be present on each of the right and left edges (not shown).

[0094] Figure 4 shows a cross-section of a flush-mounted glass pane (401), which is a laminated flush-mounted glass pane, composed of two glass sheets (411 and 412) and an interlayer (413), having an inner surface (402) - the contact relationship between the components is implied in the figure, although not drawn for clarity. Similarly, the defined area of the shielding area of the flush-mounted glass pane (401) is provided with a reflective film (403), and the shielding area has TL ≤ 30%. The area is provided with shielding means (405) such as those discussed above, for example enamel or paint or a dark interlayer (here at position 2 of the laminated flush-mounted glass pane). The reflective film periphery has 4 edges: a lower edge (403L), an upper edge (403U); and right and left edges (not shown). A ramp profile (404U) is attached to the upper edge (403U), while the body (405) hides and covers the lower edge (403L). Ramp profiles can be provided on each section of the right and left edges not hidden by the body (not shown). In this particular case, an IR reflective coating (414) can be provided within the interlayer (413), or deposited on either of the surfaces of the sheets (411) and (412) facing the interlayer. It is also appropriate that, as shown, the IR reflective coating (414) does not overlap with the reflective film (403), and the bottom edge of the IR reflective coating (414) is hidden by the ramp profile.

[0095] Figure 4b Shows a front projection of the flush-mounted glass pane with the reflective film (403) in the line of sight of the shielding band (405), as seen from the perspective of the occupant (perspective view). The reflective film is attached and positioned on the flush-mounted glass pane (501) such that projection and reflection can occur on the shielding band area of the windshield. The bottom part of the periphery of the reflective film is hidden by the body (405), while a ramp profile of thermoplastic material is provided on the upper edge and is transparent to the line of sight, such that the occupant only notices the appearance of the shielding band (404U is preferably transparent).

[0096] Figure 5aShows a cross-section of a flush-mounted glass panel (501), which is a laminated flush-mounted glass panel composed of two glass sheets (511 and 512) and an interlayer (513), having an inner surface (502) - the contact relationship between components is implied in the figure although not drawn for clarity. Similarly, a reflective film (503) is provided in the defined area of the masking area of the flush-mounted glass panel (501), and the masking area has TL ≤ 30%. The area is provided with masking means (505) such as those discussed above, for example enamel or paint or a dark interlayer (here at position 2 of the laminated flush-mounted glass panel). The perimeter of the reflective film has 4 edges: a lower edge (503L), an upper edge (503U); and right and left edges (not shown). Ramp profiles (506U and 506L) are attached along all the edges of the perimeter of the reflective film in the form of a part of the dashboard. An IR reflective coating (514) can be provided within the interlayer (513) or deposited on either of the surfaces of the sheets (511) and (512) facing the interlayer. It is also appropriate that, as shown, the IR reflective coating (514) does not overlap with the reflective film (503), and the bottom edge of the IR reflective coating (514) is hidden by the ramp profiles designed in the dashboard structure.

[0097] Figure 5b Shows a front projection of the flush-mounted glass panel in the line of sight of the masking strip (505), as seen from the perspective of an occupant (perspective view), where the dashboard is designed such that it includes an opening that includes the reflective film (503). The reflective film is attached and positioned on the flush-mounted glass panel (501) such that projection and reflection can occur on the masking strip area of the windshield. The entire portion of the perimeter of the reflective film is effectively hidden from the internal line of sight due to being hidden within the dashboard design covering the perimeter.

Claims

1. An embedded glass panel that separates an internal space from an external environment, the embedded glass panel having an inner surface facing the internal space and an outer surface facing the external environment, wherein, The inner surface is provided with a reflective film having a periphery in at least one region, characterized in that the reflective film has a ramp profile along at least a part of its periphery.

2. The inset glass plate according to claim 1, wherein, The reflective film is selected from: a film comprising at least one transparent liquid crystal layer; a film comprising at least one cholesteric liquid crystal layer; a film comprising a plurality of alternating polymer interference layers, etc.

3. The inset glass panel according to any one of the preceding claims, wherein, The ramp profile is selected from polyethylene terephthalate (PET), polyurethane resin, polyethylene, polypropylene, polystyrene, polyvinyl chloride (PVC), acrylonitrile butadiene - styrene (ABS), thermoplastic elastomer (TPE), polyisobutylene, silicone, acrylic resin, cyanoacrylate, epoxy resin, polyamide, ethylene - vinyl acetate, polysulfide, butyl rubber, ethylene - propylene copolymer, styrene - butadiene rubber, and mixtures or combinations thereof.

4. The flush-mounted glass panel according to any one of the preceding claims, wherein, The inset glass plate is selected from a single sheet of glass or polymer, or can be a laminate of glass and / or polymer materials.

5. The flush-mounted glass panel according to claim 4, wherein, The inset glass plate is a laminated inset glass plate, and the laminated inset glass plate comprises at least two glass sheets and at least one interlayer.

6. The inset glass plate according to any one of the preceding claims, further comprising an IR reflective coating.

7. The flush-mounted glass panel according to any one of the preceding claims, wherein, The at least one region provided with the reflective film has a light transmittance (Ill.A, 2°) of ≥60%.

8. The inset glass plate according to any one of the preceding claims, wherein, The at least one region provided with the reflective film has a light transmittance (Ill.A, 2°) of ≤30%.

9. The inset glass plate according to claim 8, wherein The region having TL≤30% is provided with a clouding means, and the clouding means includes a dark print, a dark insert, a dark patch, or a combination thereof.

10. A HUD system, comprising an inlaid glass plate according to any one of claims 1 to 9, and at least one projector that emits radiation, wherein, The region of the inset glass plate provided with the reflective film is a display region for projecting an image by the at least one projector.

11. The HUD system according to claim 10, wherein, The radiation emitted from the projector is 50% to 100% p - polarized light.

12. The HUD system according to claim 10 or 11, wherein, The radiation emitted from the projector impinges on the display region provided with the reflective film at an incident angle of 50° to 75°.

13. Use of a ramp profile for fastening at least a part of the periphery of a reflective film on an inset glass plate according to any one of claims 1 to 9, the reflective film being attached to the inner surface of the inset glass plate separating an internal space from an external environment, the inset glass plate having an inner surface facing the internal space and an outer surface facing the external environment, and the ramp profile being positioned along at least a part of the periphery of the reflective film.

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