sun visor and vehicle

Abstract

The invention relates to a sun visor (5) for a vehicle (1) comprising a vehicle interior (2) and a windshield (3), wherein the sun visor (5) has a sun visor blade (6) which is pivotably mounted on the vehicle (1) in the area of ​​the windshield (3) between a parked position (P) and a service position (G). The sun visor blade (6) has at least one blade area (7) whose light transmittance can be varied between a transparency state with relatively high light transmittance and a dimming state with relatively low light transmittance. Increased utility can be achieved if the sun visor (5) has at least one polarization switching device (8) which is arranged in the respective leaf area (7) and which has two polarization films (15, 16) which extend parallel to the leaf area (7) and which are adjustable relative to each other between a transparency position, which produces the transparency state, and a dimming position, which produces the dimming state.

Description

[0001] The present invention relates to a sun visor for a vehicle according to the preamble of claim 1. The invention further relates to a vehicle equipped with at least one such sun visor.

[0002] A sun visor of this type is known, for example, from US 10,558,066 B2 and comprises a sun visor blade that is pivotably mounted in the vehicle interior in the area of ​​the vehicle's windshield between a parked position and a usable position. The sun visor blade has at least one section whose light transmission can be varied between a transparent state with relatively high light transmission and a dimmed state with relatively low light transmission. In the known sun visor, the change in the light transmission of the blade section is achieved by designing the respective blade section as an electrosensitive, i.e., electrically switchable, liquid crystal plate of the type of PDLC, whose light transmission changes when an electrical voltage is applied.

[0003] The use of so-called PDLCs, where PDLC stands for Polymer Dispersed Liquid Crystal, typically only allows for two switching states: dimmed and transparent, meaning that intermediate states are not possible. Furthermore, PDLCs are usually milky and cloudy in the de-energized state, requiring a constant current to achieve the transparent state.

[0004] Other sun visor systems that use such electrosensitive liquid crystals are known from US 2021 / 0 071 473 A1, from DE 10 2019 217 661 A1 and from DE 10 2019 205 012 A1.

[0005] From DE 20 2021 004 210 U1, a laminated glass is known, which can be designed, for example, as a windshield, and which has a selectively polarizable layer and a permanently polarized coating. The permanently polarized coating is configured to preferentially transmit p-polarized light, i.e., parallel or transversely magnetically polarized light, while the selectively polarizable layer, by applying an electrical voltage, exhibits either a higher transmittance for p-polarized light or for s-polarized light, i.e., for perpendicularly or transversely electrically polarized light. The light transmittance of the laminated glass is greater when the selectively polarizable layer is configured to have a higher transmittance for p-polarized light.If, on the other hand, the selectively polarizable layer is switched to exhibit higher transmittance for s-polarized light, the light transmittance of the composite disk is reduced. In both switching states of the selectively polarizable layer, it retains its transparency and does not become milky and opaque as a PDLC does in the stress-free state.

[0006] From DE 10 2017 207 749 A1 a sun visor device is known which works with a polarizing filter that is adjustable along a windshield.

[0007] The present invention addresses the problem of providing an improved or at least a different embodiment for a sun visor of the type described above or for a vehicle equipped with it, which is characterized in particular by high utility value and / or high reliability.

[0008] This problem is solved according to the invention by the subject matter of the independent claim. Advantageous embodiments are the subject matter of the dependent claims.

[0009] The invention is based on the general concept of equipping the sun visor with at least one polarization switching device, which is arranged in the respective section of the sun visor and which can be switched between a transparent state and a dimmed state. The polarization switching device operates with two polarizing films that extend parallel to the section of the visor and are adjustable relative to each other. The polarizing films can be adjusted between a transparent position, which produces the transparent state, and a dimmed position, which produces the dimmed state. Both polarizing films can be arranged in the respective section of the visor in a way that allows them to be adjusted relative to the sun visor.It is also conceivable that one polarizing film is fixed to the sun visor in the respective lens area, while the other polarizing film is adjustable relative to the sun visor and thus also relative to the fixed polarizing film in the respective lens area. Each polarizing film has a polarization direction. By precisely aligning the polarizing films relative to each other, the light transmission through the polarizing films, or through the respective lens area, can be varied. The polarizing effect of the polarizing films is permanent, meaning it is present even without current, so no current is required to operate them. Consequently, the selected state, in particular the transparency and dimming states, remains unchanged regardless of whether a current is applied.This results in increased utility for the sun visor presented here. At the same time, such polarizing films operate with high reliability, so the sun visor presented here also possesses high reliability in its switching function regarding light transmission.

[0010] According to an advantageous embodiment, the polarizing films can each be designed as a linear polarizing filter and have a linear polarization direction. This allows the light transmission to be influenced or changed particularly easily by simply superimposing the two polarizing films.

[0011] According to an advantageous embodiment, the two polarizing films can be arranged to be translationally, i.e., linearly, displaceable relative to each other in a displacement direction parallel to the respective lens area. Furthermore, the two polarizing films can be arranged such that their polarization directions are rotated 90° relative to each other with respect to a rotation axis perpendicular to the respective lens area. Additionally, in the transparent position, the two polarizing films can be arranged side by side in the displacement direction within the respective lens area, while in the dimmed position, they are arranged one behind the other within the lens area in a viewing direction parallel to the rotation axis.In other words, in the dimming position, the two polarizing filters are positioned relative to each other so that they largely overlap with respect to the direction of view, while in the transparent position they do not overlap or only overlap slightly with respect to the direction of view. The direction of view is the direction in which a driver or user of the sun visor looks when looking towards a light source that they wish to block out or dim using the sun visor.

[0012] Each polarizing filter has a relatively high light transmission on its own, allowing the transparency to be adjusted when the two filters are positioned side-by-side in the viewing direction. In this case, the light passes through only one filter or both filters in parallel. However, if the filters are positioned one behind the other in the viewing direction, the light must pass through them sequentially, resulting in a significant reduction in light transmission and thus enabling the dimming state. Side-by-side polarizing filters essentially provide maximum light transmission, while those positioned one behind the other result in minimal light transmission.

[0013] In an alternative embodiment, the two polarizing films can be arranged to rotate relative to each other about an axis of rotation perpendicular to the respective leaf area. Furthermore, the two polarizing films can be arranged one behind the other within the respective leaf area in a viewing direction parallel to the axis of rotation. Additionally, the two polarizing films can be arranged such that their polarization directions are parallel to each other in the transparent position and rotated 90° around the axis of rotation in the dimmed position. In this configuration, both polarizing films are always penetrated serially by light, and the light transmission can be adjusted by changing the rotational position between the two polarizing films.Parallel polarization directions result in a comparatively high light transmission, representing the transparent state, while perpendicular polarization directions lead to a significant reduction in light transmission, representing the opaque state. Parallel polarization directions result in virtually maximum light transmission, while perpendicular polarization directions result in minimum light transmission.

[0014] In the present context, a “configuration” is synonymous with a “design”, so that the phrase “configured so that” is synonymous with the phrase “designed so that”.

[0015] A particularly useful improvement is one in which the transparency position and the dimming position each represent an end position of a rotation range for the polarizing filters, within which the polarizing filters can be rotated relative to each other. A preferred configuration is one in which at least one further rotation position is adjustable for the polarizing filters, lying between the two end positions. In each of these further rotation positions, the light transmission is then between the minimum light transmission of the dimming state and the maximum light transmission of the transparency state. This allows the light transmission to be adjusted in stages between the maximum light transmission of the transparency state and the minimum light transmission of the dimming state. Each of these further rotation positions then corresponds, in effect, to a dimming step.A dimming state whose light transmission lies between that of the transparent state and that of the dimmed state. In principle, several, and in particular any number of, additional rotation positions can be implemented, thus allowing for any number of dimming levels. Likewise, stepless adjustment of the rotation position between the two polarizing films is conceivable, so that virtually stepless dimming of the light transmission between maximum and minimum light transmission is possible. This results in a particularly high utility value for the sun visor.

[0016] Advantageously, the polarization switching device can be configured for manual operation and preferably has at least one manually operable and manually adjustable handle element that is coupled to at least one of the polarization films and, when adjusted, shifts the two polarization films relative to each other. Such a manually operable polarization switching device therefore operates without current and is characterized by particularly high reliability. In particular, the manually operable polarization switching device can also be used when the vehicle is switched off.

[0017] In an alternative embodiment, the polarization switching device can be configured for electric motor actuation. This polarization switching device can then have at least one electric motor drive coupled to at least one of the polarization films, which, when adjusted, shifts the two polarization films relative to each other. Such an electric motor-operated polarization switching device offers increased comfort for the user or driver (male / female / diverse), thus also enhancing the usability of the sun visor.

[0018] In another embodiment, the sun visor blade may only have one section containing a polarization switching device. This results in a particularly simple and cost-effective design for the sun visor.

[0019] Alternatively, the sun visor blade can be designed to have only one blade area in which several polarization switching devices are arranged. With two or more polarization switching devices within the blade area, separate sectors can be formed within the blade area, each with its own polarization switching device, and each sector can be individually adjusted, particularly with regard to its light transmission.

[0020] Alternatively, the sun visor blade can be designed with multiple sections, each containing only one polarization switching device. Here, too, individually adjustable light transmission is achieved for the two or more sections.

[0021] In another embodiment, the sun visor blade may have several sections, each containing one or more polarization switching devices. This means that each of the two or more sections has one, two, or more polarization switching devices, allowing for particularly high flexibility in adjusting the light transmission.

[0022] According to an advantageous embodiment, the sun visor can have several polarization switching devices configured to be actuated separately, so that their polarizing films can be adjusted independently relative to one another. In this way, the sun visor leaf is segmented with respect to light transmission, with each segment being individually adjustable. Alternatively, the sun visor can also have several polarization switching devices configured to be actuated synchronously, so that their polarizing films can be adjusted synchronously relative to one another. For example, it is conceivable that the respective leaf section or the sun visor leaf can be adjusted more effectively over a larger area with respect to light transmission by using several polarization switching devices.In particular, the use of multiple polarization switching devices makes it possible to replicate a complex geometry of a sun visor blade in order to create the largest possible blade area or to provide the largest possible proportion of the sun visor blade area with one or more blade areas.

[0023] A vehicle according to the invention, which may in particular be a passenger car, has a vehicle interior, a windshield, and a vehicle roof and is equipped with at least one sun visor of the type described above. The sun visor blade of the respective sun visor is arranged in the vehicle interior. The sun visor blade can be held on the vehicle roof in such a way that it is pivotable between the parked position, in which the sun visor blade extends flat along the vehicle roof and, in particular, lies flat against it, and the operating position, in which the sun visor blade protrudes from the vehicle roof.Alternatively, the sun visor can be mounted on the windshield in such a way that it can be pivoted between the parked position, in which the sun visor lies flat against the windshield, and the operating position, in which the sun visor protrudes from the windshield. Using the sun visor presented here, a conventional arrangement on the vehicle roof can be achieved, while an arrangement directly on the windshield is also possible. The transparency can be configured so that the sun visor is largely transparent to sunlight in the respective area, ensuring that the sun visor does not create an optical obstruction in the parked position.This is particularly advantageous with so-called panoramic roofs, where the vehicle roof glazing extends to the windshield or where the windshield extends into the vehicle roof. A configuration in which the sun visor panel has only one section that covers essentially the entire surface is especially useful. Similarly, an embodiment in which the sun visor panel has several sections that cover essentially the entire surface is also advantageous.

[0024] The respective bracket that holds the sun visor on the vehicle can be configured so that the sun visor can be rotated and / or swiveled and / or slid and / or otherwise moved in the usual way within the vehicle interior relative to the windshield and / or relative to the vehicle roof in order to enable the most optimal positioning for the desired dimming effect.

[0025] Further important features and advantages of the invention will become apparent from the dependent claims, the drawings and the associated description of the figures based on the drawings.

[0026] It is understood that the features mentioned above and those to be explained below can be used not only in the combinations specified, but also in other combinations or individually, without departing from the scope of the invention as defined by the claims. Components of a higher-level unit, such as a device, apparatus, or arrangement, mentioned above and those to be mentioned below, which are designated separately, can form separate parts or components of this unit or be integral areas or sections of this unit, even if this is depicted differently in the drawings.

[0027] Preferred embodiments of the invention are shown in the drawings and are explained in more detail in the following description, wherein identical reference numerals refer to identical or similar or functionally identical components. They show, schematically, Fig. 1 an isometric view of a vehicle in the area of ​​a sun visor according to a first embodiment, Fig. 2 a simplified longitudinal section of the vehicle according to section lines II from Fig. 1, Fig. 3. A view of the vehicle as shown in Fig. 1, however, in a second embodiment, Fig. 4 a simplified longitudinal section of the vehicle according to section lines IV in Fig. 3, Fig. 5 a simplified schematic representation of a polarization switching device according to a first embodiment, Fig. 6 A simplified schematic representation of the polarization switching device according to a second embodiment for different states A, B, C and D.

[0028] According to the Fig. 1 to 4, a vehicle 1, only partially shown here, has a vehicle interior 2, a windshield 3 and a vehicle roof 4 as well as at least a sun visor 5.

[0029] Each sun visor 5 has a sun visor blade 6 which is pivotably mounted in the vehicle interior 2 on the vehicle 1 in the area of ​​the windshield 3 between a parking position P and a working position G. Fig. Figures 1 to 4 show the parking position P and the operating position G, respectively, so that two sun visor blades 6 are visible in each case. It is clear that each sun visor 5 has only a single sun visor blade 6, which can be adjusted between the parking position P and the operating position 6. The adjustability of the sun visor blade 6 between the parking position P and the operating position is described in the Fig. Numbers 1 to 4 are indicated by a double arrow and labelled with V.

[0030] The sun visor blade 6 has at least one blade section 7 whose light transmission can be varied between a transparent state and a dimmed state. In the transparent state, blade section 7 has a relatively high light transmission, while in the dimmed state it has a relatively low light transmission. In any case, the light transmission is lower in the dimmed state than in the transparent state. In particular, it can be provided that the light transmission in the transparent state is chosen to be so high that sunlight can pass through blade section 7 virtually unhindered. Furthermore, it can be provided that the light transmission in the dimmed state is so low that blade section 7 is virtually opaque to sunlight.

[0031] The sunshade 5 presented here is also equipped with at least one polarization switching device 8, which is arranged in the respective leaf area 7. In the examples of the Fig. Figures 1 to 4 each show a configuration in which the polarization switching device 8 virtually fills the entire leaf area 7, and in this case, the sunshade leaf 6 has only a single leaf area 7 that essentially fills the entire sunshade leaf 6. For example, the sunshade leaf 6 can have a transparent glass body that forms the leaf area 7 entirely or except for a surrounding frame, in which the polarization switching device 8 is arranged.

[0032] During the Fig. 1 and Fig. In the first embodiment of the vehicle 1 shown in Figure 2, the sun visor blade 6 is pivotably held in the vehicle interior 2 on the vehicle roof 4 between the parking position P, in which the sun visor blade 6 extends along the vehicle roof 4, and the operating position G, in which the sun visor blade 6 protrudes from the vehicle roof 4.

[0033] According to Fig. 2. In such a configuration, the possible forward field of vision 9 of driver F is limited. The possible field of vision 9 of driver F is in Fig. 2 indicated by broken lines a and b. Another broken line c divides the possible field of vision 9 into a field of vision 10 usable for driving and an area 11 obscured by the vehicle roof 4. It is evident that the driver 10 can only use a comparatively small part of the available field of vision 9. Fig. 2 is a transition 12 between the windshield 3 and the vehicle roof 4, indicated by a dividing line from which a roof area 13 extends to the rear and a windshield area 14 extends to the front. In this design, this transition 12 is located in front of the driver F.

[0034] During the Fig. 3 and Fig. In the second embodiment shown in Figure 4, the sun visor blade 6 is pivotably held in the vehicle interior 2 on the windshield 3 between the parking position P, in which the sun visor blade 6 extends along the windshield 3, and the operating position G, in which the sun visor blade 6 protrudes from the windshield 3. Fig. 4, the possible field of vision 9 is no longer obstructed by the vehicle roof 4. In this design, the transition 12 between the vehicle roof 4 and the windshield 3 is located behind the driver F, so that the usable field of vision 10 extends over the entire possible field of vision 9. Fig. 4. The masked area 11 is only present when the sun visor blade 6 is in its parked position P and is in the dimmed state. If, on the other hand, the transparency state is set, the masked area 11 disappears and thus becomes the field of vision.

[0035] According to the Fig. 5 and Fig. 6 The respective polarization switching device 8 has two polarization films 15 and 16, which can also be referred to below as the first polarization film 15 and the second polarization film 16. The two polarization films 15, 16 are in the Fig. 5 and Fig. 6 are represented as flat surfaces. It is clear that the polarizing films 15, 16 can also be spatially curved. In any case, the two polarizing films 15, 16 extend parallel to each other and parallel to the respective sheet area 7, which is located in the Fig. 5 and Fig. 6 is each represented by the drawing plane. The two polarizing films 15, 16 are adjustable relative to each other between a transparency position, in which the two polarizing films 15, 16 produce the transparent state, and a dimming position, in which the two polarizing films 15, 16 produce the dimming state. The two polarizing films 15, 16 can each be applied to a plate-shaped support, which may have a glass body.

[0036] The first polarizing film 15 has a first polarization direction P1, which is preferably linear. The second polarizing film 16 has a second polarization direction P2, which is preferably linear. Advantageously, the two polarizing films 15, 16 can be designed as linear polarization filters, each having a linear polarization direction P1 and P2. The polarization directions P1 and P2 are defined in the Fig. 5 and Fig. 6 each indicated by double arrows.

[0037] Both Fig. In the first embodiment of the polarization switching device 8 shown in Figure 5, the two polarization films 15, 16 are arranged to be displaceable bidirectionally linearly or translationally relative to each other in a displacement direction 17 parallel to the respective leaf area 7. Furthermore, the two polarization films 15, 16 are arranged such that their polarization directions P1, P2 are rotated 90° relative to each other with respect to a rotation axis D perpendicular to the respective leaf area 7. Fig. In position 5, the axis of rotation D is perpendicular to the drawing plane. The two polarizing filters 15, 16 are arranged side by side within the respective sheet area 7 in the transparent position with respect to the direction of movement 17. The light can then penetrate the respective sheet area 7 in such a way that it passes through either only one polarizing filter 15, 16 or both polarizing filters 15, 16 in parallel. In the dimmed position, however, the two polarizing filters 15, 16 are arranged one behind the other in a viewing direction parallel to the axis of rotation D. The light must then pass through both polarizing filters 15, 16 sequentially within sheet area 7. Fig. Figure 5 shows an overlap area 18 in which the two polarizing films 15, 16 overlap in the displacement direction 17 and in which the two polarizing films 15, 16 are arranged one behind the other in the viewing direction. The dimming position is already achieved in this overlap area 18. Outside the overlap area 18, the transparency position is still present. As soon as the overlap area 18 completely covers the respective lens area 7 or the portion of the lens area 7 assigned to the polarizing switching device 8 due to the displacement of the two polarizing films 15, 16, the dimming state is present.

[0038] The displacement of the two polarization foils 15, 16 relative to each other in the displacement direction 17 is shown in the example of the Fig. 5 is achieved by shifting only the second polarizing film 16 relative to the sunshade blade 6 and relative to the first polarizing film 15, which is fixedly arranged on the sunshade blade 6.

[0039] In Fig. Figure 6 shows a second embodiment of the polarization switching device 8, in which the two polarization films 15, 16 are arranged to be rotatable relative to each other with respect to a rotation axis D perpendicular to the respective sheet area 7. Here too, the rotation axis D is perpendicular to the plane of the drawing. Fig. 6A, Fig. 6B, Fig. 6C and Fig. Figure 6D indicates a double arrow representing a rotational adjustment 19 of the two polarizing films 15, 16 relative to each other. In this second embodiment, the two polarizing films 15, 16 are always arranged one behind the other in a viewing direction parallel to the axis of rotation D, so that the light always passes through both polarizing films 15, 16 successively. The polarization switching device 8 is configured here such that the two polarizing films 15, 16 are arranged in the transparent position so that their polarization directions P1, P2 are aligned parallel to each other, which in Fig. 6A is indicated. In contrast, the two polarizing filters 15, 16 are arranged in the dimmed position such that their polarization directions P1 and P2 are rotated 90° relative to each other, which in Fig. 6D is indicated.

[0040] Unlike the one in Fig. The embodiment shown in 5 is in the Fig. In the embodiment shown in Figure 6, a permanent overlap area 20 is present in which the two polarizing films 15, 16 are arranged one behind the other in the viewing direction, the light transmission of this overlap area 20 changing depending on the rotational position between the two polarizing films 15, 16. This overlap area 20 completely fills the respective sheet area 7 or only fills the portion of the sheet area 7 to which the respective polarizing switching device 8 is assigned.

[0041] The transparency position according to Fig. 6A and the dimming position according to Fig. 6D each represent an end position of a rotation range in which the two polarizing films 15, 16 can be rotated relative to each other. The relative rotation of the two polarizing films 15, 16 occurs in the example of the Fig. 6A to 6D by rotating only the second polarizing film 16 relative to the sunshade blade 6 and relative to the first polarizing film 15, which is fixedly arranged on the sunshade blade 6.

[0042] In the example of the Fig. For polarizing films 15 and 16, at least one further rotation position can be set on models 6A to 6D, which lies between the two end positions. Fig. 6B and Fig. Figure 6C shows, purely as examples, two further rotation positions that lie between the two end positions. Starting from the transparency position, in which the two polarization directions P1 and P2 extend parallel to each other, the light transmission decreases with increasing rotation angle, i.e., with increasing rotation 19 of the two polarizing films 15, 16 relative to each other, until in the dimming position according to Fig. 6D represents the minimum light transmission. Accordingly, each further rotation position represents a dimming position where the light transmission lies between the maximum light transmission of the transparent state and the minimum light transmission of the dimmed state. In particular, the two polarizing films 15, 16 can be adjusted in steps or continuously to virtually any intermediate position, thus enabling step or continuous dimming of the light transmission.

[0043] According to Fig. 5. The respective polarization switching device 8 can be configured for manual operation and, for this purpose, has at least one manually operable and manually adjustable handle element 21. The handle element 21 is coupled to at least one of the polarization films 15, 16, here to the second polarization film 16, so that when it is manually adjusted, it adjusts the two polarization films 15, 16 relative to each other. Alternatively, the polarization switching device 8 can be configured for electromechanical operation and accordingly has at least one electromechanical drive 22, which is coupled to at least one of the two polarization films 15, 16, here to the second polarization film 16, and which, when electromechanically adjusted, adjusts the two polarization films 15, 16 relative to each other.The electromechanical drive 22 can include an actuator, in particular a linear motor or the like, which is coupled to the respective polarization film via a threaded rod or a rack. It is clear that such manual or electromechanical actuation is also possible in the case of the [unclear text]. Fig. The polarization switching device 8 shown in 6 is feasible. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] US 10 558 066 B2

[0002] US 2021 / 0 071 473 A1

[0004] DE 10 2019 217 661 A1

[0004] DE 10 2019 205 012 A1

[0004] DE 20 2021 004 210 U1

[0005] DE 10 2017 207 749 A1

[0006]

Claims

[1] Sun visor (5) for a vehicle (1) having a vehicle interior (2) and a windscreen (3), - wherein the sun visor (5) has a sun visor blade (6) which is held on the vehicle (1) in the region of the windscreen (3) so as to be pivotable between a parking position (P) and a use position (G) in the vehicle interior (2), - wherein the sun visor blade (6) has at least one blade region (7) whose light transmittance can be varied between a transparency state with relatively high light transmittance and a dimming state with relatively low light transmittance, characterized by , - that the sun visor (5) has at least one polarization switching device (8) which is arranged in the respective leaf region (7) and which has two polarization films (15, 16) which extend parallel to the leaf region (7) and which are adjustable relative to one another between a transparency position which produces the transparency state and a dimming position which produces the dimming state. [2] Sun visor (5) according to claim 1, characterized by , - that the respective polarization film (15, 16) is designed as a linear polarization filter and has a linear polarization direction (P1, P2). [3] Sun visor (5) according to claim 1 or 2, characterized by , - that the two polarising films (15, 16) are arranged to be translationally displaceable relative to one another in a displacement direction (17) running parallel to the respective sheet region (7), - that the two polarising films (15, 16) are arranged such that their polarisation directions (P1, P2) are rotated by 90° relative to each other with respect to an axis of rotation (D) running perpendicular to the respective leaf region (7), - that the two polarising films (15, 16) are arranged next to each other in the direction of displacement (17) in the transparent position, - that the two polarizing films (15, 16) are arranged one behind the other in the dimming position in a viewing direction parallel to the axis of rotation (D). [4] Sun visor (5) according to claim 1 or 2, characterized by , - that the two polarising films (15, 16) are arranged so as to be rotatable relative to one another with respect to a rotation axis (D) running perpendicular to the respective leaf region (7), - that the two polarising films (15, 16) are arranged one behind the other in a viewing direction parallel to the axis of rotation (D), - that the two polarization films (15, 16) are arranged such that their polarization directions (P1, P2) are aligned parallel to each other in the transparent position and are rotated by 90° to each other in the dimming position. [5] Sun visor (5) according to claim 4, characterized by , - that the transparency position and the dimming position each represent an end position of a rotation range of the polarising films (15, 16) in which the polarising films (15, 16) can be rotated relative to one another, - that at least one further rotational position can be set for the polarizing films (15, 16), which lies between the two end positions. [6] Sun visor (5) according to one of the preceding claims, characterized by , - that the respective polarization switching device (8) is configured for manual actuation and has at least one manually operable and adjustable handle element (21) which is coupled to at least one of the polarization films (15, 16) and, when adjusted, adjusts the two polarization films (15, 16) relative to one another. [7] Sun visor (5) according to one of claims 1 to 5, characterized by , - that the respective polarization switching device (8) is configured for electromotive actuation and has at least one electromotive drive (22) which is coupled to at least one of the polarization films (15, 16) and, when adjusted, adjusts the two polarization films (15, 16) relative to one another. [8] Sun visor (5) according to one of the preceding claims, characterized by , - that the sun visor blade (6) has only one blade area (7) in which only one polarization switching device (8) is arranged, or - that the sun visor blade (6) has only one blade area (7) in which several polarization switching devices (8) are arranged, or - that the sun visor blade (6) has several blade areas (7) in each of which only one polarization switching device (8) is arranged, or - that the sun visor blade (6) has several blade areas (7) in which only one or more polarization switching devices (8) are arranged. [9] Sun visor (5) according to one of the preceding claims, characterized by , - that the sun visor (5) has a plurality of polarization switching devices (8) which are configured to be separately operable, so that their polarization films (15, 16) can be separately adjusted relative to one another, or - that the sun visor (5) has a plurality of polarization switching devices (8) which are configured to be synchronously actuated, so that their polarization films (15, 16) can be adjusted synchronously relative to one another. [10] Vehicle (1), in particular passenger car, - with a vehicle interior (2), - with a windshield (3), - with a vehicle roof (4), - with at least one sun visor (5) according to one of the preceding claims, the sun visor blade (6) of which is held pivotably in the vehicle interior (2) either on the vehicle roof (4) between the parking position (P), in which the sun visor blade (6) extends along the vehicle roof (4), and the use position (G), in which the sun visor blade (6) protrudes from the vehicle roof (4), or on the windshield (3) between the parking position (P), in which the sun visor blade (6) extends along the windshield (3), and the use position (G), in which the sun visor blade (6) protrudes from the windshield (3).

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