DE202021100774U1 - Composite pane with optimized beam path for a sensor attached to it - Google Patents

Abstract

Composite pane (1) comprising:
- an outer pane (2),
- an inner pane (3),
- A functional layer (6) and a correction layer (8), which are arranged between the outer pane (2) and the inner pane (3), the correction layer (8) on at least one section of the circumferential side edge (V) of the functional layer (6) adjoins,
- A sensor (9) which is attached to the inner pane (3) and which, with a receiver element, is directed to a detector area (10) of the composite pane (1) with the functional layer (6) and the correction layer (8), the composite pane (1) has a constant thickness in the area of the functional layer (6) and the correction layer (8).

Description

The invention relates to a composite pane with an optimized beam path for a sensor attached to it.

Modern vehicles are being equipped with an increasing number of optical sensors, the signals of which are used to support the driver. Examples of such sensors are cameras such as video cameras or night vision cameras, rain sensors, light sensors or distance meters. Forward-facing sensors are often attached to the interior surface of the windshield, typically in the center near the top edge. In order to cover the sensors, opaque cover prints are used in the area of the sensor.

Conventional sensors are attached to the windshield in such a way that their detection direction is horizontal. Since the windshield is installed at a steep incline in the vehicle, for example at an installation angle of 60 ° to the vertical, the detection direction of the sensor forms a very acute angle of about 30 ° with the windshield. This results in a comparatively large, essentially trapezoidal detector area of the windshield.

The sensor detects the radiation that passes through the detector area of the windshield. The detector area of the windshield is therefore the area that lies in the detection beam path of the sensor. The data received by the sensor is particularly needed in the development of autonomous driving. The vehicle is dependent on ever more precise data about the route, weather conditions, lighting conditions and other parameters. So that the sensor can record this data, a free beam path with the lowest possible optical distortion is necessary.

The optical distortion, which is also called distortion, is a question of geometric imaging errors in optical systems. These distortions lead, for example, to pincushion or barrel-shaped distortion.

Distortions can be caused, for example, by optical coupling phenomena when the curvature of the laminated inner pane and outer pane differ slightly from one another.

Another cause of optical distortion can be an applied masking print on the outer or inner pane, which is located in the detector area or adjacent to it. To reduce this distortion, for example, functional layers, also called patches, made of polyethylene terephthalate (PET), polyvinyl butyral (PVB) or ethylene vinyl acetate (EVA) are used. These are attached in the detector area between the inner and outer panes. This was disclosed, among other things, in DE202020106572U1 .

The object of the present invention is to provide a composite pane in which the optical properties are improved in certain areas.

The object of the present invention is achieved according to the invention by a composite pane according to independent claim 1. Preferred embodiments emerge from the subclaims.

The composite pane according to the invention comprises an outer pane, an inner pane, a functional layer and a correction layer, which are arranged between the outer pane and the inner pane. The correction layer adjoins at least one section of the circumferential side edge of the functional layer. A sensor is attached to the inner pane. The sensor is an optical sensor that can detect radiation with wavelengths from 100 nm to 750 nm. It is also directed with a receiver element onto a detector area of the composite pane with the functional layer and the correction layer. The composite pane has a constant thickness in the area of the functional layer and the correction layer. The functional layer and the correction layer lie in the same plane of the composite pane. The receiver element is the component of the sensor with which the optical beam path can be detected.

When looking through the composite pane, the correction layer is located in the same plane as the functional layer, starting with the outer pane and ending with the inner pane. In other words, this means that the correction layer and the functional layer are located in the same plane of extent. The correction layer borders at least with an adjoining section of its side edge on a section of the circumferential side edge of the functional layer.

The functional layer and the correction layer have a first main surface and a second main surface, independently of one another. The first main surface faces the outer pane and the second main surface faces the inner pane. The area running between the two main areas of the functional layer or correction layer is referred to as the side edge.

For the purposes of the invention, with reference to the side edges of the functional layer and correction layer, “adjacent” means the direct contact of the side edge of the correction layer with the side edge of the functional layer. Adjacent can also mean a slight overlap of a maximum of 1 mm of the correction layer and the functional layer, so that the side edges are not in direct contact with one another. In this case, however, the main surfaces of the correction layer and the functional layer are in contact with one another. Adjacent can also mean non-direct contact. Distances of up to 1 mm between the side edges of the correction layer and the functional layer are considered to be adjacent for the purposes of the invention.

The functional layer and / or the correction layer are transparent to light, preferably for light with a wavelength of 100 nm to 750 nm and in particular 250 nm to 750 nm.

The composite pane is preferably used as a window pane which is suitable and provided for delimiting an interior space from an external environment.

The correction layer adjoining at least one section of the circumferential side edge of the functional layer enables improved radiation transmission through the composite pane in the area of the functional layer and the correction layer. It was found that, without the use of the correction layer, a local curvature of the composite pane occurs, which causes distortions. These distortions affect the function of the sensor attached to the inner pane. Because of the adjoining correction layer with the same thickness as the functional layer, a curvature of the composite pane in the edge area of the functional layer is prevented. The curvature is shifted outside the edge area of the functional layer towards the edge area of the correction layer that is not adjacent to the functional layer. The radiation that emerges in the detector area and is detected by the sensor therefore leads to no or fewer imaging errors.

In a special embodiment of the composite pane, the sensor detects an optical beam path that runs through the composite pane. The optical beam path leaves the composite pane in the detector area to which the sensor is directed. The optical beam path consists of radiation with a wavelength of 100 nm to 750 nm.

The composite pane has an upper edge and a lower edge as well as two side edges running in between. The upper edge denotes that edge which is intended to point upwards in the installed position. The lower edge denotes that edge which is intended to point downwards in the installation position. The upper edge is often referred to as the roof edge and the lower edge as the engine edge.

The outer pane and the inner pane each have an outer-side and an inner-space-side surface and a circumferential side surface running between them. For the purposes of the invention, the outside surface denotes that main surface which is intended to face the external environment in the installed position. In the context of the invention, the interior-side surface denotes that main surface which is intended to face the interior in the installed position. The interior surface of the outer pane and the outer surface of the inner pane face one another and are connected to one another, for example, by an inner and / or outer thermoplastic composite film and / or an adhesive layer.

The adhesive layer is, for example, an adhesive that can connect mineral glass with different organic polymers.

The thermoplastic composite film on the outside and the thermoplastic composite film on the inside can, independently of one another, contain at least PVB, EVA, polyurethane (PU) or mixtures or copolymers or derivatives thereof, preferably PVB. The thermoplastic composite film on the outside and the thermoplastic composite film on the inside can be formed independently of one another by a single film or also by more than one film.
In a preferred embodiment of the composite pane, the functional layer and the correction layer are connected to the outer pane and / or the inner thermoplastic composite film to the inner pane via at least the thermoplastic composite film on the outside. Thermoplastic composite films have proven themselves as binding material in composite panes.

The thermoplastic composite film on the outside and the thermoplastic composite film on the inside can be between 20 μm and 2 mm thick. The thermoplastic composite film on the outside and / or the thermoplastic composite film on the inside can be, for example, between 0.2 mm to 2 mm, particularly preferably from 0.3 mm to 1 mm, for example 0.38 mm or 0.76 mm, thick. The thickness of the thermoplastic composite film on the outside and the thickness of the thermoplastic composite film on the inside is constant over the entire length, so the intermediate layers have a rectangular shape Cross-section. The composite foils are therefore not wedge foils. If the first thermoplastic composite film or the second thermoplastic composite film is a functional composite film with acoustic damping properties, this is preferably 0.51 mm or 0.84 mm thick.

Optionally, the thermoplastic composite film on the outside or the thermoplastic composite film on the inside or both the thermoplastic composite film on the outside and the thermoplastic composite film on the inside is a functional composite film. A “functional composite film” is a composite film which has at least one special function, in particular an acoustically damping function, a color function, a solar function or a combination of these functions. The functional composite film with a solar function means in the context of the invention that the solar radiation is absorbed by the functional composite film. The functional composite film with a color function means in the context of the invention that the functional composite film has a color.

In a preferred embodiment of the composite pane, the thickness of the correction layer deviates from the thickness of the functional layer by a maximum of 10%, preferably by a maximum of 2%, particularly preferably by a maximum of 1%. This allows distortions within the detector area to be further minimized. In particular, the difference in thickness between the correction layer and the functional layer is less than 0.5% and is, for example, 0.0%. If the thicknesses of the functional layer and the correction layer are almost identical or identical, optical imaging errors resulting from distortions are almost completely or completely avoided.

In a further preferred embodiment of the composite pane, the correction layer adjoins the entire side edge of the functional layer. In other words, this means that the correction layer, the functional layer, completely surrounds and adjoins it in its plane of extent. This arrangement of the correction layer and the functional layer reduces or completely prevents distortions in the entire edge area of the functional layer.

In a further preferred embodiment, the composite pane has at least one cover print. The cover print adjoins the circumferential side edge of the functional layer when viewed through the composite pane. As an alternative, the cover print can completely or partially overlap with the functional layer. The cover print is preferably applied to the interior surface of the outer pane by means of the screen printing process. If the screen printing process is used on glass panes, special enamel colors are usually baked into the glass at a temperature of between 600 ° C and 1200 ° C. The colors are permanently bonded to the glass through the baking process. If plastic panes are to be printed with a cover print, screen printing processes based on physically drying inks can be used. In this case, the paints dry out as the solvent, which is contained in the paints, evaporates to form a solid paint film. The masking print is, for example, a black print, a white print or a print in another color that is opaque in the wavelength range from 100 nm to 750 nm. The use of a cover print has proven to be advantageous; it protects the functional layer, the correction layer, the thermoplastic composite film on the inside and the outside from ultraviolet radiation (UV radiation). It can also be used in areas that are in the detector area and that would lead to optical imaging errors in the case of a beam path.

The correction layer and the functional layer can have a glass transition temperature of below 150.degree. C., preferably below 130.degree. C. and particularly preferably below 120.degree. It was found that a partial fusion of the functional layer and the correction layer takes place during lamination if at least the correction layer or the functional layer have a glass transition temperature of less than 150 ° C. The functional layer and / or the correction layer becomes viscous during lamination and encloses the adjoining functional layer or correction layer. This process reduces overlaps and shifts in the correction layer or functional layer.

In a preferred embodiment, the correction layer and the functional layer contain, independently of one another, at least PVB, EVA and PU or PET, polyethylene, polypropylene, polycarbonate, polymethyl methacrylate, polystyrene, polyamide, polyester and polyvinyl chloride or mixtures or copolymers or block polymers, preferably PVB or PET, thereof. PVB, EVA and PU or mixtures or copolymers or block polymers thereof have proven themselves for thermoplastic intermediate layers of composite panes and produce an adhesive connection to glass. For this reason, a good connection between the outer pane and the inner pane with the thermoplastic functional layer is guaranteed. PET, polyethylene, polypropylene, polycarbonate, polymethyl methacrylate, polystyrene, polyamide, polyester and polyvinyl chloride or mixtures or copolymers or block polymers thereof have proven to be advantageous if the functional layer and / or the correction layer are functional Should have properties, for example de-icing and / or anti-fogging properties.

In a particularly preferred embodiment of the invention, the correction layer has a glass transition temperature of 150 ° C. or lower and preferably contains or consists of PVB, and the functional layer contains PET, polyethylene, polypropylene, preferably PET, or copolymers or block polymers thereof. Alternatively, the functional layer has a glass transition temperature of 150 ° C. or lower and preferably contains or consists of PVB, and the correction layer contains PET, polyethylene, polypropylene, preferably PET, or copolymers or block polymers thereof.

In a further preferred embodiment, the functional layer and / or the correction layer have properties such as deicing and / or anti-fogging properties. A functional layer that has de-icing or anti-fog properties is suitable for locally heating the composite pane. The heating can cause frozen water to melt and liquid water to evaporate. These properties can therefore be used to keep the outside surface of the outer pane free of water in the detector area.

In a further preferred embodiment of the invention, the thickness of the functional layer is from 35 μm to 100 μm, preferably from 50 μm to 80 μm and particularly preferably from 50 μm to 60 μm. The described range of the thickness of the functional layer is particularly useful in order not to impair the optical quality of the composite pane.

The functional layer and / or the correction layer preferably contains sensory materials, busbars and / or flat conductors. The busbar and the flat conductor can contain or consist of metals or metal alloys, preferably aluminum and / or copper. The sensory materials can be a video camera, night vision camera, a rain sensor, light sensor and / or distance meter. The installation of sensory materials in the composite pane is advantageous because it reduces the space required outside the composite pane and thus makes various applications for the composite pane more accessible.

A busbar is an arrangement of conductors that serve as a central distributor of electrical energy. Several to all incoming and outgoing power lines are connected to the busbar. Busbars are particularly clear and can also increase failure, functional and operational reliability.

A flat conductor is a flat component with a thickness of 10 μm to 1 mm, preferably 25 μm to 0.1 mm and particularly preferably 35 μm to 100 μm. The flat conductor conducts electrical energy. The flat conductor can be arranged within a polymer-containing film. The polymer-containing film preferably contains or consists of PET, polypropylene and / or polyethylene. Flat conductors have proven to be advantageous when electrical energy has to be transported, but the expansion of the conductive component can for the most part only take place in two spatial dimensions. This is the case, for example, with composite panes.

In a preferred embodiment, the sensor is attached at a distance of about 50 cm or less, preferably 10 cm or less and particularly preferably 5 cm or less, from the functional layer. The sensor is attached to the interior surface of the inner pane. It has been shown that the sensor distance (with its receiver element) of 50 cm or less to the functional layer can improve the radiation detection of light of different wavelengths.

In an advantageous embodiment of the invention, the sensor is attached to the interior surface of the inner pane by means of suitable holders, for example a bracket or housing. The sensor is preferably aligned parallel to the horizontal and the angle of the receiver element of the sensor to the composite pane therefore corresponds to the installation angle of the composite pane to the horizontal. However, the sensor can also be arranged at a different angle to the composite pane. The sensor is preferably an optical camera, that is to say a camera with sensitivity in the visible spectral range, for example a lane camera or a camera for augmented reality head-up displays and driver assistance systems.

In a particularly preferred embodiment of the invention, the sensor is an optical camera as used in driver assistance systems. It has been shown that the composite pane according to the invention is suitable with good results as a windshield in order to be used in vehicles with driver assistance systems.

In a further preferred embodiment of the invention, the functional layer and / or the correction layer contain coatings, preferably coatings with electrically conductive, ultraviolet-light-absorbing and / or ultraviolet-light-reflecting properties. The use of coatings to protect against ultraviolet Radiation has proven itself. Over time, ultraviolet radiation can damage organic compounds such as thermoplastic layers and especially adhesive layers.

In a preferred embodiment, the outer pane and / or the inner pane can contain or consist of flat glass, preferably quartz glass, borosilicate glass, soda-lime glass or polyethylene, polypropylene, polycarbonate, polymethyl methacrylate, polystyrene, polyamide, polyester and polyvinyl chloride. The inner pane and the outer pane are preferably made of soda-lime glass. The inner pane and the outer pane can be clear or tinted independently of one another.

The inner pane and the outer pane can have the same thickness or different thicknesses. Discs with a thickness in the range from 0.8 mm to 5.0 mm and preferably from 1.4 mm to 2.5 mm are preferably used, for example those with the standard thicknesses of 1.6 mm or 2.1 mm. However, it is also possible for the outer pane and / or the inner pane to have a thickness of 0.55 mm or 0.7 mm.

The inner pane and / or the outer pane can have further suitable coatings known per se, for example non-stick coatings, tinted coatings, anti-reflective coatings, anti-scratch coatings or low-E coatings. An example of coated glass is low-E glass (low emissivity glass).

The composite pane is intended to be used in means of transport for traffic on land, in the air or on water. The composite pane is particularly intended to be used in motor vehicles, for example, as a windshield, rear window, side windows and / or glass roof, preferably as a windshield or as a functional and / or decorative individual piece and as a built-in part in furniture, devices and buildings.

The invention is explained in more detail below with the aid of exemplary embodiments and the attached figures, which are not intended to restrict the invention in any way. The attached figures are schematic representations and are not true to scale.

• 1 eine Draufsicht auf eine Ausgestaltung einer erfindungsgemäßen Verbundscheibe,
• 1a einen Querschnitt durch einen Ausschnitt der Ausgestaltung der erfindungsgemäßen Verbundscheibe in 1,
• 2 eine Draufsicht auf eine weitere Ausgestaltung der erfindungsgemäßen Verbundscheibe mit einer an einen Abschnitt des Seitenrandes der Funktionsschicht angrenzenden Korrekturschicht,
• 2a einen Querschnitt durch einen Ausschnitt der weiteren Ausgestaltung der erfindungsgemäßen Verbundscheibe in 2,
• 3 eine Draufsicht auf eine weitere Ausgestaltung der erfindungsgemäßen Verbundscheibe enthaltend einen Abdeckdruck, der mit der Korrekturschicht überlappt,
• 3a einen Querschnitt durch einen Ausschnitt der weiteren Ausgestaltung der erfindungsgemäßen Verbundscheibe in 3,
• 4 eine Draufsicht auf eine weitere Ausgestaltung der erfindungsgemäßen Verbundscheibe enthaltend einen Abdeckdruck, der vollständig mit der Funktionsschicht überlappt,
• 4a einen Querschnitt durch einen Ausschnitt der weiteren Ausgestaltung der erfindungsgemäßen Verbundscheibe in 4,
• 5 eine Vergrößerung eines Abschnitts des Querschnitts der erfindungsgemäßen Verbundscheibe in 1a

Show it:

• 1 a plan view of an embodiment of a composite pane according to the invention,
• 1a a cross section through a section of the configuration of the composite pane according to the invention in 1 ,
• 2 a top view of a further embodiment of the composite pane according to the invention with a correction layer adjoining a section of the side edge of the functional layer,
• 2a a cross section through a section of the further embodiment of the composite pane according to the invention in 2 ,
• 3 a plan view of a further embodiment of the laminated pane according to the invention containing a cover print which overlaps with the correction layer,
• 3a a cross section through a section of the further embodiment of the composite pane according to the invention in 3 ,
• 4th a plan view of a further embodiment of the laminated pane according to the invention containing a cover print that completely overlaps with the functional layer,
• 4a a cross section through a section of the further embodiment of the composite pane according to the invention in 4th ,
• 5 an enlargement of a portion of the cross section of the composite pane according to the invention in 1a

The following is an explanation of the invention with reference to the figures according to the structure and, if necessary, also according to the mode of operation of the invention shown. The explanations and explanations in the figures do not restrict the invention in any way.

The following is a reference to the 1 to 4th and the 1a to 4a taken, in which plan views ( 1 to 4th ) and cross-sectional views ( 1a to 4a) different configurations of the composite pane 1 are shown.

1 shows a plan view of a first embodiment of the composite pane according to the invention 1 . The 1a Figure 13 shows a cross-sectional view of the composite pane 1 . The cross-sectional view of 1a corresponds to the section line AA of the laminated pane 1 , as in 1 is indicated.

The composite pane 1 is installed in a vehicle and separates a vehicle interior from an external environment. For example, the composite pane 1 the windshield of a motor vehicle.

The composite pane 1 from the 1 and 1a includes an outer pane in the following order 2 with outside surface I. and interior surface II , an exterior thermoplastic composite film 4th , a functional layer 6th with a surrounding margin V , and one in Correction layer located on the same plane 8th , which frame-like around the functional layer 6th is arranged, an inside thermoplastic composite film 5 and an inner pane 3 with outside surface III and interior surface IV . It's also a sensor 9 to the inner pane 3 appropriate. The composite pane 1 has an upper edge IX the composite pane 1 and a bottom edge VIII the composite pane 1 on. With the top edge IX the composite pane 1 that edge is referred to which is intended to point upwards in the installation position. With the lower edge VIII the composite pane 1 that edge is referred to which is intended to point downwards in the installation position. The functional layer 6th is, for example, a metal-coated plastic film with de-icing and / or fogging functions. The functional layer 6th contains, for example, PET. The thickness of the functional layer 6th is for example 50 µm. The outer pane 2 and the inner pane 3 consist, for example, of soda-lime glass. The outside and inside thermoplastic composite film 4th , 5 are for example PVB films.

In the sensor shown in the embodiment 9 it is an optical sensor that can detect rays of different wavelengths, for example rays of visible light. The sensor 9 is on a detector area 10 directed. The sensor 9 is for example a lane camera. The direction of detection of the sensor 9 is on the outside of the laminated pane 1 directed roughly horizontally forwards. A beam path from the in 1a shown sensor 9 is detected, runs through the functional layer 6th and at most partially through the correction layer 8th and leaves the composite pane 1 on the interior surface IV the inner pane 3 in the detector area 10 .

The correction shift 8th has a surface that faces the interior surface II the outer pane 2 is facing. The correction shift 8th has a second, on the opposite side, surface that faces the outside surface III the inner pane 3 is facing. The correction shift 8th also has an exposed portion of the side edge VII that is not attached to the functional layer 6th adjoins. The correction shift 8th and the functional layer 6th are smaller in area than the outer and inner pane 2 , 3 as well as the outside and inside thermoplastic composite film ( 4th , 5 ) and completely overlap with these. The functional layer 6th overlaps in vertical view through the composite pane 1 complete with the detector area 10 . The correction shift 8th partially, but not completely, overlaps the detector area 10 . The exposed portion of the margin VII the correction shift 8th does not overlap with the detector area 10 .

The correction shift 8th has approximately the same thickness as the functional layer 6th on. The correction shift 8th consists for example of a thermoplastic layer, preferably PVB, which has a glass transition temperature of below 150 ° C.

The surrounding margin V the functional layer 6th according to the invention, adjoins an adjoining section of the side edge VI a correction shift 8th . Due to the expansion of the area of the functional layer 6th adjacent correction layer 8th can be used in the edge area of the functional layer 6th occurring distortions, which occur in a generic composite pane, can be prevented. In the case of a composite pane of the generic type, which is designed in exactly the same way as that in 1 and 1a Shown composite pane 1 , but without the functional layer according to the invention 6th adjacent correction layer 8th , distortions occur in the edge area of the functional layer 6th . These arise during the lamination of the pane due to a difference in thickness in the area of the composite pane with the functional layer 6th and in the area of the composite pane without the functional layer 6th . This difference in thickness, which becomes a taper in the laminated disc (shown in 5 ), leads to an area of distortion. Distortions, also known as distortion, are geometric imaging errors in optical systems. Is a beam path that goes through the composite pane in the area of the functional layer 6th (Detector area 10 ) is detected by a sensor, optical imaging errors can therefore occur.

The composite pane according to the invention 1 , which in the 1 and 1a shown solves this problem by removing the area with distortions outside the detector area 10 is moved. This is achieved through the functional layer 6th adjacent correction layer 8th .

In 1 is a masking print that runs around the edge of the laminated pane 12th shown. This cover print can for example be on the inner surface IV the inner pane 2 be applied and consists for example of an electrically non-conductive material, for example a black-colored screen printing ink that is burned in. The presence of the circumferential masking print 12th is optional and does not limit the invention in any way.

2 shows a plan view of an embodiment of the composite pane according to the invention 1 . The cross-sectional view of 2a corresponds to the section line BB 'of the laminated pane 1 , as in 2 is indicated. The 2 and 2a show essentially the same characteristics as they do in the 1 and 1a are shown, with the exception that a masking print 11 on a section of the interior surface II the outer pane 2 is applied and the correction layer 8th with the adjacent portion of the page margin VI only to a section of the circumferential side edge V the functional layer 6th adjoins. The correction shift 8th is in this embodiment of the composite pane according to the invention 1 not like a frame around the functional layer 6th arranged. The masking print 11 adjoins three of four edges of the square functional layer 6th which of the outer pane 2 are facing. The masking print 11 does not border on one edge which is in the direction of the lower edge IX and the outer pane 2 is facing.

The masking print 11 is for example a black print, a white print or a print in another color that is opaque in the wavelength range from 100 nm to 750 nm.

The beam path from the in 2a shown sensor 9 is detected, does not run through with the masking print 11 applied area of the composite pane 1 . Due to the opacity of the cover print 11 there is little or no distortion in this area. Optical imaging errors in the form of distortions are thus avoided or reduced. The masking print 11 is preferably coincident with the functional layer 6th because the resulting distortions are caused by the difference in thickness in the edge area of the functional layer 6th also around a few micrometers around the edge area of the functional layer 6th may occur.

As an alternative to the one in the 2 and 2a The embodiment shown could also include the functional layer 6th , the correction shift 8th and the masking print 11 in their arrangement in the composite pane 1 be rotated. In this case, the axis of rotation is centered and orthogonal to the surface of the functional layer 6th . In the case of a rotation about the axis of rotation, rotations through 90 ° would be preferred.

3 shows a plan view of a further embodiment of the composite pane according to the invention 1 . The cross-sectional view of 3a corresponds to the section line CC 'of the laminated pane 1 , as in 3 is indicated. The 3 and 3a show essentially the same characteristics as they do in the 1 and 1a are shown, with the exception that a masking print 11 on a portion of the interior-facing surface II the outer pane 2 is applied and the outer pane 2 with the surface on the interior side II on the functional layer 6th and correction layer 8th is arranged and this is not from a thermoplastic composite film 4th be separated.

The masking print 11 is like a frame around the edges of the functional layer 6th educated. The edges of the functional layer 6th which is attached to the masking print 11 are adjacent to the outer pane 2 facing. The masking print 11 also completely overlaps with the correction layer 8th . The beam path that goes through the laminated pane 1 runs and in the area of the detector area 10 emerges, crosses the functional layer 6th . Because of the cover print 11 the beam path does not run through the correction layer 8th . The functional layer 6th and the correction layer 8th are for example by means of an adhesive layer on the outer pane 2 attached.

Because of the adjoining correction layer according to the invention 8th to the functional layer 6th there will be no lens flare in the area of the circumferential side edge V the functional layer 6th educated. The optical quality of the laminated pane 1 is improved by this arrangement.

4th shows a plan view of a further embodiment of the composite pane according to the invention 1 . The cross-sectional view of 4a corresponds to the intersection line DD 'of the laminated pane 1 , as in 4th is indicated. The 4th and 4a show essentially the same characteristics as they do in the 2 and 2a except that the detector area 10 completely in a vertical view through the composite pane 1 with the correction shift 8th overlaps, whereas the functional layer 6th not with the detector area 10 overlaps. The masking print 11 completely overlaps with the functional layer 6th and partly with the correction layer 8th , where the masking pressure 11 Is designed like a frame. In the top view of 4th is the frame-like cover print 11 shown with a square recess in the middle. This recess of the masking print 11 enables a section of the correction layer to be seen in a vertical view 8th and the detector area 10 which accordingly do not match the masking print 11 overlap.

The functional layer 6th is in this embodiment of the invention, for example, an electrically conductive film. The correction shift 8th consists for example of a transparent busbar, which preferably contains copper.

Reference will now be made to the 5 taken wherein an enlarged portion of the cross section of the composite pane of the invention 1 out 1a is shown. The 5 shows an edge area of the functional layer 6th , which with a section of the circumferential side edge V to an adjacent portion of the page margin VI the correction shift 8th adjoins.

This enlarged section shows the displacement of a distortion area 7th from the edge area of the functional layer 6th to a exposed portion of the side margin VII the correction shift 8th which can lead to distortions in a beam path running through it. In the edge area of the functional layer 6th there is thus a distortion-free area 7.1 .

In all exemplary embodiments, the cover printing 11 and the correction layer 8th independently of one another by 1 µm to 50 µm with the functional layer 6th overlap.

List of reference symbols

1

Composite pane

2

Outer pane

3

Inner pane

4th

external thermoplastic composite film

5

inner thermoplastic composite film

6th

Functional layer

7th

Distortion area

7.1

distortion-free area

8th

Correction shift

9

sensor

10

Detector area

11

Cover print

12th

all-round masking print

I.

outside surface of the outer pane 2

II

Inner surface of the outer pane 2

III

outside surface of the inner pane 3

IV

Inner surface of the inner pane 3

V.

circumferential side edge of the functional layer 6th

VI

adjoining portion of the side edge of the correction layer 8

VII

exposed portion of the side edge of the correction layer 8

VIII

Lower edge

IX

Top edge

A-A '

Cross-section through the composite pane 1 out 1

B-B '

Cross-section through the composite pane 1 out 2

C-C '

Cross-section through the composite pane 1 out 3

D-D '

Cross-section through the composite pane 1 out 4th

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 202020106572 U1 [0007]

Claims (11)

Composite pane (1) comprising: - an outer pane (2), - an inner pane (3), - A functional layer (6) and a correction layer (8), which are arranged between the outer pane (2) and the inner pane (3), the correction layer (8) on at least one section of the circumferential side edge (V) of the functional layer (6) adjoins, - A sensor (9) which is attached to the inner pane (3) and which, with a receiver element, is directed to a detector area (10) of the composite pane (1) with the functional layer (6) and the correction layer (8), the composite pane (1) has a constant thickness in the area of the functional layer (6) and the correction layer (8). Composite pane (1) Claim 1 , wherein the sensor (9) detects a beam path which runs through the composite pane (1) and leaves it in the detector area (10) with a wavelength of 100 nm to 750 nm. Composite pane (1) according to one of the Claims 1 or 2 , the functional layer (6) and the correction layer (8) being connected to the outer pane (2) via at least one outer thermoplastic composite film (4) and / or an inner thermoplastic composite film (5) to the inner pane (3). Composite pane (1) according to one of the Claims 1 to 3 , the correction layer (8) adjoining the entire side edge (V) of the functional layer (6). Composite pane (1) according to one of the Claims 1 to 4th which has at least one cover print (11), the cover print (11) adjoining at least one section of a circumferential edge of the functional layer (6) or wholly or partially overlapping with the functional layer (6) when viewed through the laminated pane (1). Composite pane (1) according to one of the Claims 1 to 5 , the correction layer (8) and / or the functional layer (6) having a glass transition temperature of below 150 ° C and preferably below 120 ° C. Composite pane (1) according to one of the Claims 1 to 6th , the correction layer (8) and the functional layer (6) independently of one another at least polyvinyl butyral, ethylene vinyl acetate and polyurethane or polyethylene terephthalate, polyethylene, polypropylene, polycarbonate, polymethyl methacrylate, polystyrene, polyamide, polyester and polyvinyl chloride or mixtures or copolymers or block polymers thereof, preferably polyvinyl butyral or Polyethylene terephthalate, contain or consist thereof. Composite pane (1) according to one of the Claims 1 to 7th , the thickness of the functional layer (6) being from 35 µm to 100 µm, preferably from 50 µm to 80 µm and particularly preferably from 50 µm to 60 µm. Composite pane (1) according to one of the Claims 1 to 8th , wherein the functional layer (6) contains, for example, sensory materials, busbars and / or flat conductors. Composite pane (1), according to one of the Claims 1 to 9 wherein the sensor (9) is attached to the inner pane (3) at a distance from the functional layer (6) of about 10 cm or less and preferably 5 cm or less. Composite pane (1) according to one of the Claims 1 to 10 , wherein the functional layer (6) and / or the correction layer (8) contain coatings, preferably coatings with electrically conductive, ultraviolet light absorbing and / or ultraviolet light reflecting properties.

Images