Composite pane for a motor vehicle

Abstract

The invention relates to a composite pane (1) for a motor vehicle, comprising an outer pane (8), an inner pane (2) and an opaque masking strip (3), the inner pane (2) and the outer pane (8) being connected to one another, the masking strip (3) being arranged on the outer pane (8), the inner pane (2) having an outer surface facing the outer pane (8) and an inner surface facing away from the outer pane (8), a reflective coating (7) being arranged on the inner surface, the reflective coating (7) being designed to reflect visible light, characterised in that an opaque heating coating (4) is arranged on the outer surface, the heating coating (4) being designed to be heated by the supply of electrical energy, wherein the masking strip (3) covers the heating coating (4) and the heating coating (4) is printed, preferably by screen-printing.

Description

[0001] SAINT-GOBAIN SEKURIT FRANCE 2024276-WO-PCT

[0002] 1

[0003] Composite disc for a motor vehicle

[0004] The present invention relates to a composite disc for a motor vehicle according to the preamble of claim 1.

[0005] Composite windscreens are known from the prior art for displaying information to a motor vehicle driver. For example, the information can be projected onto the composite windscreen. This method of displaying information can also be referred to as a head-up display.

[0006] WO 2022 / 238 101 A1 discloses a laminated glass pane comprising an outer pane, an inner pane, and a thermoplastic intermediate layer arranged between the outer and inner panes. The outer and inner panes each have an outer and an inner surface. The thermoplastic intermediate layer includes a masking layer. The masking layer is opaque in at least one region. The laminated glass also includes a heating element located within the opaque region of the masking layer and a reflective layer suitable for reflecting visible light. The reflective layer is positioned spatially in front of the masking layer in the viewing direction from the inner to the outer pane and overlaps at least partially with the opaque region of the masking layer.

[0007] WO 2022 / 179 817 A1 discloses a projection arrangement with a composite disk comprising a transparent outer disk, a thermoplastic intermediate layer, a reflective layer, and a transparent inner disk. The reflective layer is arranged between the outer and inner disks and is suitable for reflecting p-polarized light. The reflective layer is either opaque itself or, when viewed through the composite disk from the inside of the inner disk, spatially arranged against an opaque background. The projection arrangement also includes an image display device, which is directed at the reflective layer and illuminates it with p-polarized light through the inner disk. The reflective layer reflects the p-polarized light.

[0008] In contrast, the present invention aims to achieve better visibility of the projected light. SAINT-GOBAIN SEKURIT FRANCE 2024276-WO-PCT

[0009] 2

[0010] This problem is solved by a composite disc according to claim 1, a method according to claim 9, and a motor vehicle according to claim 11. Embodiments of the invention are specified in the dependent claims.

[0011] The laminated glass pane according to claim 1 comprises an outer pane, an inner pane, and an opaque masking strip. For the purposes of this description, the outer pane is understood to be, in particular, the pane that faces the environment when the laminated glass is used as intended. For the purposes of this description, the inner pane is understood to be, in particular, the pane that faces the interior of a motor vehicle when the laminated glass is used in that vehicle.

[0012] In this description, the term "opaque" is understood to mean in particular that the element described as opaque has a light transmission, for example according to the standard ISO 9050:2003, of less than 20%, preferably less than 10%, particularly preferably less than 5% and particularly less than 0.1%.

[0013] With regard to the determination of luminous transmittance according to ISO 9050:2003 (see section 3.3 of the standard), the relative spectral distribution of illuminant D65 (see, for example, ISO 11664-2:2007) and / or the relative spectral distribution of illuminant A (see, for example, ISO 11664-2:2007) can be used for the determination. In other words, the described luminous transmittance range can be used for determination using illuminant A and / or illuminant D65.

[0014] The outer and inner panes are preferably made of glass, particularly preferably of soda-lime glass, as is common for window panes. However, one or both panes can also be made of other types of glass, such as quartz glass, borosilicate glass, or aluminosilicate glass, or of rigid, clear plastics, such as polycarbonate or polymethyl methacrylate. The thicknesses of the outer and inner panes are preferably from 0.5 mm to 5 mm, and particularly preferably from 1 mm to 3 mm, and are independent of each other.

[0015] The inner and outer panes are bonded together. In particular, the inner and outer panes can be bonded together by a material bond. For example, a bonding layer can be arranged between the outer and inner panes, which is bonded to both the outer pane and the SAINT-GOBAIN SEKURIT FRANCE 2024276-WO-PCT

[0016] 3

[0017] The inner sheet is bonded to the inner sheet by a material bond. The bonding layer can be based, for example, on polyvinyl butyral (PVB), ethylene-vinyl acetate (EVA), or polyurethane (PU), or on mixtures, copolymers, or derivatives thereof, particularly preferably on PVB. This means that the films can contain the polymer to a large extent (proportion greater than 50% by weight). In addition to the polymer, the bonding layer can contain other additives, such as plasticizers, UV absorbers, or stabilizers. The thickness of the bonding layer is preferably from 0.2 mm to 2 mm. For example, the bonding layer can comprise one or more PVB films with standard thicknesses of 0.38 mm or 0.76 mm.

[0018] The opaque masking strip is located on the outer pane. The masking strip can, for example, be printed on the outer pane and be black.

[0019] The masking strip is preferably a coating consisting of one or more layers. Alternatively, it can also be an opaque element embedded in the laminated glass, for example, a film. According to a preferred embodiment of the laminated glass, the masking strip consists of a single layer. This has the advantage of particularly simple and cost-effective manufacturing of the laminated glass, since only a single layer needs to be formed for the masking strip.

[0020] In addition to its function as described in the invention, the masking strip can also serve to mask structures that would otherwise be visible through the glass when installed. Particularly in the case of a windshield, the masking strip serves to conceal the adhesive bead used to bond the windshield to a vehicle body. This means it prevents the view of the typically irregularly applied adhesive bead from the outside, resulting in a harmonious overall appearance of the windshield. Furthermore, the masking strip provides UV protection for the adhesive material. Continuous exposure to UV light damages the adhesive and would eventually weaken the bond between the glass and the vehicle body. In the case of glass with an electrically controlled functional layer, the masking strip can also be used, for example, to cover busbars and / or connection elements.

[0021] The masking strip is preferably printed onto the outer pane, particularly using screen printing. The printing ink is applied using a SAINT-GOBAIN SEKURIT FRANCE 2024276-WO-PCT

[0022] The design is printed through a fine mesh fabric onto the glass pane. The printing ink is forced through the fabric, for example, using a rubber squeegee. The fabric has areas that are permeable to the printing ink, as well as areas that are impermeable, thus defining the geometric shape of the print. The fabric therefore acts as a stencil for the print. The printing ink contains at least one pigment and glass frits suspended in a liquid phase (solvent), such as water or organic solvents like alcohols. The pigment is typically a black pigment, for example, carbon black, aniline black, bone black, iron oxide black, spinel black, and / or graphite. Printing using digital printing is also possible.

[0023] The inner pane has an outer surface facing the outer pane and an inner surface facing away from the outer pane. A reflective coating is arranged on the inner surface. The reflective coating can, in particular, comprise several individual layers or a single layer. An opaque heating coating is arranged on the outer surface. The heating coating preferably has a light transmittance of at most 20%, more preferably at most 10%, most preferably at most 1%, and particularly preferably at most 0%. The opaque heating coating is advantageous because it improves the visibility of the information displayed on the reflective coating, especially if, for example, the masking strip and the reflective coating still transmit light that could impair the visibility of the information.

[0024] The reflective coating is designed to reflect visible light. For example, the reflective coating can be designed to reflect more than 80% of the light incident upon it. The reflective coating can preferably be used as a projection surface. Due to the reflection of the light, projected information can be clearly seen by a user. The heating coating is designed to be heated by an electrical supply. The masking strip covers the heating coating. It is possible for the heating coating to be invisible from both the outside and the inside, which is advantageous for optical reasons.

[0025] The heating coating is advantageous for warming the reflective coating, ensuring that it reflects projected light effectively even at cold temperatures and high humidity. Under these conditions, the SAINT-GOBAIN SEKURIT FRANCE 2024276-WO-PCT

[0026] 5

[0027] Without a heating layer, a reflective coating can fog up, resulting in poor reflection of the projected light, making it difficult or impossible for the user to see the displayed information. Positioning the reflective coating on the inner surface is particularly advantageous for concealing the heating layer, which some users find visually unappealing. Furthermore, the heating layer can also be used in extremely cold temperatures to defrost the lower area of ​​the laminated glass, where, for example, windshield wipers might be frozen.

[0028] Designing the heating coating to be opaque is particularly advantageous for achieving optimal heating performance. This is because the opacity is achieved by increasing the thickness of the heating coating. Therefore, the design can focus primarily on the heating effect. The visual appearance of the heating coating is less important, as the reflective coating and masking strip conceal it, making it virtually invisible to the user.

[0029] Another advantage of the opaque heating coating is that, with a masking strip that is not completely opaque, light transmission to the reflective coating is reduced or even prevented. This is beneficial so that the user can see the information displayed on the reflective coating particularly well and easily.

[0030] According to one embodiment of the invention, the reflective coating can cover the heating coating. This can mean, in particular, that the heating coating is not visible when looking at the inner pane. For example, the reflective coating and the heating coating can be arranged in the same area of ​​the laminated pane. It is also possible for the reflective coating to cover a larger area of ​​the laminated pane than the heating coating. In particular, if the heating coating has a structure, the reflective coating can cover a larger area than the heating coating, since the reflective coating preferably has a smooth, unstructured surface.

[0031] According to one embodiment of the invention, the reflective coating and the heating coating can be arranged, in particular exclusively, in a lower or upper end region of the laminated glass. This is a particularly advantageous SAINT-GOBAIN SEKURIT FRANCE 2024276-WO-PCT

[0032] 6

[0033] The area is designed to display information to the user without unduly obstructing their view of the road. In this description, the lower end area refers specifically to one-fifth, preferably one-sixth, of the laminated glass. Similarly, the upper end area refers specifically to one-fifth, preferably one-sixth, of the laminated glass. The terms "lower" and "upper" are used in this description to refer to the intended use of the laminated glass. Outside the lower and upper end areas, the laminated glass may be transparent, particularly to visible light. It should be noted that the reflective and heating coatings do not necessarily have to cover the entire lower and upper end areas, respectively, although this is possible.

[0034] According to one embodiment of the invention, the heating coating can have a structure. For the purposes of this description, this means in particular that the heating coating has multiple lines. Such a structure can be advantageous for heating the composite disc homogeneously in the area of ​​the heating coating. In particular, the electrical resistance of the heating coating can also be influenced by the structure.

[0035] The lines can have a width of, for example, 10 pm to 1 cm, preferably 50 pm to 1 mm, and particularly preferably 100 pm to 500 pm. Such widths have proven particularly suitable in practical tests. Thinner lines may exhibit excessively high electrical resistance for effective heating. However, wider lines are not required, as comparatively low heating power is sufficient. This is especially true if the reflective coating is to be heated only above the dew point.

[0036] It is also possible for the heating coating to have linear recesses. These recesses can have a width between 10 µm and 1 cm, preferably between 50 µm and 1 mm, and particularly preferably between 100 µm and 500 µm. In this case, distortion can occur during operation due to the inhomogeneous heating properties of the glass and the heating coating. It can therefore be advantageous to select a particularly low number of transitions between the recesses and the parts of the heating coating used for heating. Alternatively, a particularly large number of such transitions can be provided, but these must be SAINT-GOBAIN SEKURIT FRANCE 2024276-WO-PCT

[0037] 7 have a particularly narrow width, so that the thermal heating behavior is averaged.

[0038] It is also possible for the heating coating to be structureless, for example, a smooth coating. This can help ensure that the heating coating has little or no impact on the reflective properties of the reflective coating. For instance, the heating coating could include a single heating element along a lower edge of the outer surface. This heating element could be operated at a higher power than the lines mentioned above. Since the heat generated by the heating element rises, the area of ​​the reflective coating above it would also be heated. Any distortions that might occur would then not be located in the area where the information is displayed. In this case, the heat distribution could also be assisted convectively by a vehicle ventilation system. This way, energy and material can be saved.

[0039] It is also possible that the heating coating has several primary lines in a lower area of ​​the outer surface, each with a width greater than 0.5 mm, and especially greater than 1 mm. Above these primary lines, secondary lines could be arranged, which may have a narrower width than the primary lines. Due to their width, the primary lines would become warmer than the secondary lines. Since heat rises, this allows for particularly uniform heating. Furthermore, material can be saved on the secondary lines, thus reducing the heating power required.

[0040] According to one embodiment of the invention, the heating coating can be printed on. In this way, the heating coating can be manufactured particularly easily.

[0041] According to one embodiment of the invention, the heating coating can have a thickness of 5 pm to 50 pm, particularly preferably 7 pm to 30 pm, and especially 10 pm to 15 pm.

[0042] According to one embodiment of the invention, the heating coating can comprise or consist of silver. Silver is particularly well suited for heating by means of electrical energy.

[0043] According to one embodiment of the invention, the reflective coating can consist of several dielectric layers, several silicon-based layers and / or several SAINT-GOBAIN SEKURIT FRANCE 2024276-WO-PCT

[0044] The material comprises eight carbon-based layers. A silicon-based layer is defined in particular as a layer consisting of more than 30% silicon by weight. A carbon-based layer is defined in particular as a layer consisting of more than 30% carbon by weight.

[0045] According to one embodiment of the invention, the reflective coating can comprise TiÜ2, SiO2, SiZrN, SiO2, SiB, SiZrAl, Si, SiO2, SiA1N^Nb, ​​TiC and / or ZrC. Practical tests have shown that these materials are particularly well suited for the reflective coating.

[0046] According to one embodiment of the invention, the reflective coating can be opaque. The reflective coating can have a light transmittance of at most 20%, preferably at most 10%, particularly preferably at most 1%, and especially at most 0%. The opaque reflective coating is advantageous because it improves the visibility of the information displayed on it, for example, if the masking strip and the heating coating still transmit light that could impair the visibility of the information.

[0047] After the printing ink is applied, the glass sheet undergoes a heat treatment in which the liquid phase is driven off by evaporation and the glass frits are melted and permanently bonded to the glass surface. This heat treatment is typically carried out at temperatures in the range of 450°C to 700°C. The pigment remains in the glass matrix formed by the melted glass frit as a masking strip. This masking strip preferably has a thickness of 5 µm to 50 µm, and particularly preferably 8 mm to 25 µm.

[0048] Alternatively, the masking strip is a colored or pigmented, preferably black pigmented, thermoplastic composite film, preferably based on polyvinyl butyral (PVB), ethyl vinyl acetate (EVA), or polyethylene terephthalate (PET), preferably PVB. The coloring or pigmentation of the composite film is freely selectable, but preferably black. The colored or pigmented composite film is preferably arranged between the outer and inner panes. The colored or pigmented thermoplastic composite film preferably has a thickness of 0.25 mm to 1 mm. Preferably, the colored or pigmented composite film extends over a maximum of 50%, and particularly preferably a maximum of 30%, of the surface of the composite pane. To avoid thickness variations in the composite pane, SAINT-GOBAIN SEKURIT FRANCE 2024276-WO-PCT

[0049] 9. Preferably, a further transparent thermoplastic composite film is arranged between the outer pane and the inner pane, extending over at least 50%, preferably at least 30%, of the surface of the composite pane. The colored or pigmented composite film is arranged offset from the transparent thermoplastic composite pane in the plane of the composite pane, so that they do not overlap or cover each other.

[0050] The masking strip can also be a partially pigmented or colored thermoplastic composite film. The pigmentation or coloring of the composite film preferably extends over a maximum of 50%, and particularly preferably a maximum of 30%, of the surface of the composite disc. The remaining portion of the partially pigmented or colored thermoplastic composite film is transparent, i.e., without pigmentation or coloring. The partially pigmented or colored thermoplastic composite film preferably extends over the entire surface of the composite disc. Designing the masking strip as a pigmented or colored thermoplastic composite film, or as a partially pigmented or colored thermoplastic composite film, simplifies the production of the composite disc and improves its stability.It is very advantageous if the outer pane does not need to be coated beforehand to create an opaque background, as this can affect the stability of the composite pane and process efficiency.

[0051] According to one embodiment of the invention, the masking strip can be arranged on a surface of the outer pane facing the inner pane. This protects the masking strip from damage, wear, and contamination.

[0052] According to one embodiment of the invention, the heating coating can be electrically connected to connecting elements via current collectors. For example, the current collectors can be arranged laterally next to the heating coating. In the context of this description, this is understood to mean, in particular, that the current collectors are arranged next to the heating coating in a transverse direction of the vehicle during the intended use of the composite windscreen. For example, a first current collector can be arranged to the right of the heating coating and a second current collector to the left of the heating coating. The current collectors are particularly advantageous for simple electrical contact between the heating coating and the connecting elements. The connecting elements are SAINT-GOBAIN SEKURIT FRANCE 2024276-WO-PCT

[0053] For example, after the composite windscreen has been installed in a motor vehicle, 10 can be electrically connected to an electrical power source of the motor vehicle.

[0054] In the method according to claim 9, the outer and inner panes are provided. The heating coating is printed onto the outer surface of the inner pane. The reflective coating is applied to the inner surface of the inner pane. For example, the reflective coating can be vapor-deposited. The inner pane, provided with the heating and reflective coatings, is joined to the outer pane. The outer surface of the inner pane faces the outer pane.

[0055] According to one embodiment of the invention, the heating coating can be printed using the screen printing process.

[0056] The motor vehicle according to claim 11 comprises a laminated windscreen according to one embodiment of the invention, a projection arrangement, and an electrical power source. The laminated windscreen is configured as the windscreen of the motor vehicle. The inner pane faces the interior of the motor vehicle. For the purposes of this description, the interior is understood to be, in particular, the area in which persons can sit during the operation of the motor vehicle. The outer pane faces the surroundings of the motor vehicle. The projection arrangement is configured to project an image onto the reflective layer. The electrical power source is electrically connected to the heating coating and configured to supply the heating coating with electrical energy.

[0057] According to one embodiment of the invention, the motor vehicle can include a humidity sensor, a temperature sensor, and a control unit. The humidity sensor can be configured to measure the humidity in the interior. The temperature sensor can be configured to measure the temperature in the interior. The control unit can be configured to regulate the supply of electrical energy to the heating coating depending on the humidity and temperature. In this way, it can be ensured that as little or no moisture as possible condenses on the reflective coating and impairs the visibility of the displayed information.

[0058] It is also possible that the vehicle includes an external temperature sensor designed to measure the temperature of the vehicle's surroundings. The SAINT-GOBAIN SEKURIT FRANCE 2024276-WO-PCT

[0059] 11

[0060] The control unit can then be designed to regulate the supply of electrical energy to the heating coating depending on the ambient temperature. This can also be advantageous in reducing or even preventing condensation on the reflective coating.

[0061] According to one embodiment of the invention, the control unit can be configured to regulate the supply of electrical energy to the heating coating such that the reflective coating maintains a temperature above the dew point in the vehicle's interior. The dew point depends on the temperature and humidity. It is particularly advantageous to also consider the outside temperature in the control system, since the laminated glass separates the interior from the environment, and thus the reflective coating may be colder than the temperature measured by the temperature sensor. This can be the case, especially at very low outside temperatures. In such cases, it can be advantageous to also consider the outside temperature in the control system to maintain the temperature of the reflective coating above the dew point.

[0062] Further features and advantages of the present invention will become clear with reference to the following description of preferred embodiments and the accompanying figures. The same reference numerals are used for identical or similar components, features, or elements, and for components, features, or elements with identical or similar functions.

[0063] Fig. 1 shows a schematic sectional view through an inner pane of a composite pane according to an embodiment of the invention with the cutting plane parallel to the inner pane and lying within the inner pane;

[0064] Fig. 2 is a schematic top view of the inner pane of a composite pane according to one embodiment of the invention; and

[0065] Fig. 3 shows a schematic sectional view of a composite disc according to an embodiment of the invention with the cutting plane in a lower end region of the composite disc perpendicular to the inner disc.

[0066] The composite disc 1 comprises an inner disc 2 and an outer disc 8. In Figures 1 and 2, the outer disc 8 is covered by the inner disc 2. Since the inner disc 2 is mostly transparent, the surface on the outer disc 8 is not visible.

[0067] Twelve opaque masking strips 3 can be seen arranged. The masking strip is arranged on the surface of the outer pane 8, which faces the inner pane.

[0068] The inner pane 2 has an outer surface facing the outer pane 8 and an inner surface facing away from the outer pane. The heating coating 4 is arranged on the outer surface. The heating coating 4 has a structure. In Figure 1, this structure is shown by way of example as separate lines. The heating coating 4 is electrically connected on both sides to a busbar 5. The busbars 5 can also be referred to as busbars. The busbars 5 are each electrically connected to a connector 6. When the composite pane 1 is used, the heating coating 4 can be supplied with electrical energy from an electrical energy source via the busbars 5 and the connectors 6. The heating coating 4 is designed to heat up when supplied with electrical energy.In this way, the area of ​​the composite disc 1, in particular the inner disc 2, in which the heating coating 4 is arranged, can be heated.

[0069] The heating coating 4 can, for example, consist of or include silver. It can, for example, be printed on the inner disc 2.

[0070] The heating coating 4 can have a structure suitable for particularly homogeneous heating of the reflective coating 7. Furthermore, the electrical resistance of the heating coating can be influenced by its structure to achieve the desired behavior when electrical energy is supplied.

[0071] The heating coating 4 and the power conductors 5 are covered by the masking strip 3, which is arranged on the outer pane 8. When viewing the outer pane 8 from the side facing away from the inner pane 2, the heating coating 4 and the power conductors 5 are not visible. This is advantageous for optical reasons.

[0072] A reflective coating 7 is arranged on the inner surface of the inner pane 2 (see Figs. 2 and 3). The reflective coating 7 covers the heating coating 4, so that the heating coating 4 is concealed when viewing the inner surface. The heating coating 4 is therefore not visible from any side of the laminated pane 1. SAINT-GOBAIN SEKURIT FRANCE 2024276-WO-PCT

[0073] 13

[0074] The reflective coating 7 is designed to reflect visible light. Preferably, the reflective coating 7 reflects more than 80% of the visible light incident upon it.

[0075] The reflective coating 7 can, for example, comprise several individual layers. These can be, for example, dielectric layers, silicon-based layers, or carbon-based layers.

[0076] The reflective coating 7, the heating coating 4, and the masking strip 3 are each arranged in the lower end region of the laminated glass 1. Since a user cannot see through the reflective coating 7 and the masking strip 3, this is advantageous for providing the user with a wide field of vision when the laminated glass 1 is used as a windshield in a motor vehicle. At the same time, the reflective coating 7 can be used for projecting information, thus enabling the implementation of a particularly visible head-up display.

[0077] The outer disk 8 and the inner disk 2 are bonded together by means of a bonding layer 9. The bonding layer 9 can be based, for example, on polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), or polyurethane (PU), or on mixtures, copolymers, or derivatives thereof, particularly preferably on PVB.

[0078] Preferably, the laminated glass 1 is used as a windshield in a motor vehicle. During operation of the vehicle, information is projected onto the reflective coating 7 by means of a projection arrangement within the vehicle. Due to the good reflective properties of the reflective coating 7 and the opaque masking strip 3, this information is particularly easy to see.

[0079] When the temperature inside the vehicle approaches the dew point, the heating coating 4 is supplied with electrical energy from the vehicle, causing it to heat up. This also heats the reflective coating 7, thus reducing the likelihood of condensation forming on the reflective coating 7, which could impair the visibility of the projected information.

[0080] Furthermore, the heating coating 4 can be electrically powered to defrost the lower section of the outer pane. SAINT-GOBAIN SEKURIT FRANCE 2024276-WO-PCT can be used in the lower section.

[0081] 14 For example, windshield wipers may be frozen solid, but will be defrosted by the warming of this area and thus become movable.

[0082] SAINT-GOBAIN SEKURIT FRANCE 2024276-WO-PCT

[0083] 15

[0084] Reference symbol list

[0085] 1 composite disc

[0086] 2 inner pane 3 masking strips

[0087] 4 Heating coating

[0088] 5 power busbars

[0089] 6 Fasteners

[0090] 7 Reflective coating 8 Outer pane

[0091] 9. Compound layer

Claims

SAINT-GOBAIN SEKURIT FRANCE 2024276-WO-PCT 16 Patent claims 1. Composite windscreen (1) for a motor vehicle, comprising an outer pane (8), an inner pane (2) and an opaque masking strip (3), wherein the inner pane (2) and the outer pane (8) are connected to each other, wherein the masking strip (3) is arranged on the outer pane (8), wherein the inner pane (2) has an outer surface facing the outer pane (8) and an inner surface facing away from the outer pane (8), wherein a reflective coating (7) is arranged on the inner surface, wherein the reflective coating (7) is configured to reflect visible light, characterized in that an opaque heating coating (4) is arranged on the outer surface, wherein the heating coating (4) is configured to be heated by supplying electrical energy, wherein the masking strip (3) covers the heating coating (4), wherein the heating coating (4) is printed, preferably by screen printing.

2. Composite disc (1) according to claim 1 , characterized in that the reflective coating (7) covers the heating coating (4).

3. Composite disc (1) according to one of the preceding claims, characterized in that the reflective coating (7) and the heating coating (4) are arranged in a lower or upper end region of the composite disc (1).

4. Composite disc (1) according to one of the preceding claims, characterized in that the heating coating (4) has a structure.

5. Composite disc (1) according to one of the preceding claims, characterized in that the heating coating (4) has a thickness of 5 pm to 50 pm, particularly preferably of 7 pm to 30 pm, in particular of 10 pm to 15 pm.

6. Composite disc (1) according to one of the preceding claims, characterized in that the reflective coating (7) comprises several dielectric SAINT-GOBAIN SEKURIT FRANCE 2024276-WO-PCT 17 includes layers, multiple silicon-based layers and / or multiple carbon-based layers.

7. Composite disc (1) according to one of the preceding claims, characterized in that the reflective coating (7) comprises TiC>2, SiC>2, SiZrN, SiC>2, SiB, SiZrAI, Si, SiC>2, SiA1N^Nb, ​​TiC and / or ZrC.

8. Composite disc (1) according to one of the preceding claims, characterized in that the reflective coating (7) is opaque.

9. Method for manufacturing a composite disk (1) according to any one of the preceding claims, comprising the following steps: Provision of the outer pane (8) and the inner pane (2); Printing the heating coating (4) onto the outer surface of the inner disc (2); - Applying the reflective coating (7) to the inner surface of the inner pane (2); and connecting the inner pane (2) provided with the heating coating (4) and the reflective coating (7) to the outer pane (8), wherein the outer surface of the inner pane (2) faces the outer pane (8).

10. Method according to the previous claim, characterized in that the heating coating (4) is printed using the screen printing process.

11. Motor vehicle comprising a composite pane (1) according to any one of claims 1 to 8, a projection arrangement and an electrical energy source, wherein the composite pane (1) is configured as a windshield of the motor vehicle, wherein the inner pane (2) faces an interior of the motor vehicle, wherein the outer pane (8) faces an environment of the motor vehicle, wherein the projection arrangement is configured to project an image onto the reflective layer (7), and wherein the electrical energy source is electrically connected to the heating coating (4) and is configured to supply the heating coating (4) with electrical energy. SAINT-GOBAIN SEKURIT FRANCE 2024276-WO-PCT 18 12. Motor vehicle according to the previous claim, comprising a humidity sensor, a temperature sensor and a control unit, wherein the humidity sensor is configured to measure the humidity in the interior and the temperature sensor is configured to measure the temperature in the interior, wherein the control unit is configured to control the supply of the Heating coating (4) to be controlled with electrical energy depending on the humidity and temperature.

13. Motor vehicle according to the previous claim, characterized in that the control unit is designed to control the supply of electrical energy to the heating coating (4) in such a way that the reflective coating (7) has a temperature above the dew point in the interior of the motor vehicle.

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