DE102017126384A1 - Mirror unit for a head-up display - Google Patents

Abstract

The present invention relates to a mirror unit (18) for a head-up display (10) for reflecting radiation emitted by an imaging unit (12), the mirror unit (18) comprising a mirror element (22) having a functional side (26) and a back side (24) which is fixed to a carrier (20), wherein the carrier (20) comprises means for pivoting the mirror unit (18) about at least one axis, wherein the carrier (20) is designed as a frame element and a frame (21 ), wherein the frame (21) further comprises a support (46) for arranging the functional side (26) of the mirror element (22), so that the mirror element (22) rests with its functional side (26) on the support (46).

Description

The present invention relates to a mirror unit for a head-up display. More particularly, the present invention relates to a mirror unit for a head-up display having an improved projection of an image and good long-term durability. The present invention further relates to a head-up display comprising such a mirror unit. Furthermore, the present invention includes a vehicle having such a mirror unit.

Head-up displays, especially for motor vehicles, are well known in the art. Head-up displays have an imaging unit that projects an image, for example, to a combiner and thus to a kind of screen. Alternatively, there are variants of head-up displays in which the image is projected by the imaging unit onto the windscreen of the motor vehicle. The driver of the motor vehicle, for example, can therefore see the projected image when looking at the combiner or the windscreen.

It is important that the position of the projection of the head-up display can be changed in such a way that the projection can be adapted to different drivers or drivers of different sizes. In particular, a mirror arranged in a beam path or in an optical path of the imaging unit should be designed to be pivotable in order to adapt the position of the projection.

WO 2016/186034 A1 describes such a head-up display. In a head-up display described here, a concave mirror is fixed to a likewise concave holding element. It is provided that the back of the mirror is fixed to the holding element.

WO 2016/001313 A1 further describes a display device for a head-up display. In this case, a mirror is provided in an optical path, which rests against a retaining element on the rear side and has an aperture element which is separate from the retaining element on the front side.

Such solutions known from the prior art can offer even further potential for improvement, in particular with regard to an improved projection of an image emitted by an imaging unit.

It is the object of the present invention to at least partially overcome the disadvantages known from the prior art. It is in particular the object of the present invention to provide a solution by means of which a sharp and efficiently adjustable projection of an image emitted by an imaging unit image for a head-up display is possible in a simple manner and / or wherein a long-term stable design of the head-up Displays become possible.

The object is achieved according to the invention by a mirror unit with the features of claim 1. The object is achieved according to the invention further by a head-up display with the features of claim 9 and by a vehicle having the features of claim 10. Preferred embodiments of The invention are described in the subclaims, in the description or the figures, wherein further features described or shown in the subclaims or in the description or the figures may individually or in any combination constitute an object of the invention, if not clear from the context the opposite results.

The invention relates to a mirror unit for a mirror unit for a head-up display for reflecting radiation emitted by an imaging unit, the mirror unit having a mirror element with a functional side and a rear side fixed to a carrier, the carrier having means for pivoting the Mirror unit around at least one axis, wherein the carrier is designed as a frame member and having a frame, wherein the frame has a support for arranging the functional side of the mirror element, so that the mirror element rests with its functional side on the support.

In particular, a mirror unit designed as described above can provide a good adjustability or adaptability of a projection of radiation emitted by an imaging unit for displaying an image, and can be very long-term stable.

The mirror unit is used in particular for use in a head-up display, for example in a vehicle, such as in a motor vehicle. As such, the mirror unit may be disposed approximately in a housing into which radiation from an imaging unit is emitted. The housing may be arranged approximately in the dashboard of the motor vehicle. The radiation can represent an image when projecting onto an imaging surface. For example, it is known for head-up displays that, for example, information from driver assistance systems or a multimedia unit is displayed. For example, can be mentioned here hints from a navigation system, for example, driving direction specifications or speed specifications, or even information of a radio, or other illustrations, ie graphical representations or texts. In this case, the mirror unit serves, in particular, to reflect the beams emitted by the imaging unit and, for example, to guide them in a defined manner onto a projection surface or imaging surface. By way of example, a projection screen, also referred to as a combiner, or even a windshield of a motor vehicle itself can serve as the projection surface. Furthermore, the mirror unit can serve to enlarge the image.

Accordingly, the mirror element is arranged in the optical beam path of the imaging unit or is part of the same, so that the radiation emitted by the imaging unit impinges on the mirror element and is reflected or forwarded therefrom.

The mirror unit comprises a mirror element, which is the active part of the mirror unit and reflects the radiation. In principle, the mirror element can be designed, as is known from the prior art.

The mirror element has a function side and a back side. The function side should be understood in particular as the side which interacts with the radiation emitted by the imaging unit. In other words, the radiation emitted by the imaging unit falls on the functional side. The rear side is corresponding to the side opposite the functional side of the mirror element.

For fixing the mirror element approximately in the housing, the mirror unit further comprises a support. The carrier thus serves to receive and fix the mirror unit. Furthermore, the carrier can serve to change the mirror unit and thus the mirror in the relative position to the beam path of the radiation emitted by the imaging unit and thus to adapt the radiation or projection projected onto the projection surface, for example, to the size of a user of the motor vehicle. For this purpose, it may be provided, for example, that the carrier is pivotably mounted for pivoting the mirror unit or the mirror element.

Accordingly, it is provided in a mirror unit described here that the carrier has means for pivoting the mirror unit about at least one axis. In principle, it can also be provided that pivoting about more than one axis is possible, wherein pivoting about an axis is usually sufficient for a desired adaptability of the projection. In this case, the means for pivoting the mirror unit about at least one axis are not limited in principle.

In a mirror unit described here, it is further provided that the carrier is designed as a frame element and can also be referred to as a diaphragm. As such, the carrier is frame-shaped and has a frame surrounding or framing an opening. The frame thus serves to receive or fix the mirror element, whereas the opening ensures the function of the mirror element such that the mirror element can be exposed in the opening and thus interact with the radiation emitted by the imaging unit.

Furthermore, the opening enclosed by the frame defines the eyebox of the head-up display. The Eyebox is an optical area in the vehicle, in which the image of the head-up display in the area of the driver's head is displayed. Depending on the size of the image and / or the driver, the Eyebox must be able to be adjusted. The height of the Eyebox can be done for example by pivoting the mirror. The image size and / or trimming geometry of the image, which can be different for each vehicle model, for example due to the windshield geometry, can be adapted via the frame (size, trimming geometry).

The carrier or the frame has a support for arranging the functional side of the mirror element. The support thus serves to provide a hold or an area on which the mirror element can be positioned with its functional side. For this purpose, the support can run or be shaped in accordance with the functional side of the mirror element. This should mean, in particular, that the support is configured approximately parallel to the surface of the functional side or with a curvature or arch shape corresponding to the surface of the functional side.

In order to ensure a fixed seat or a defined position of the mirror element, it may be advantageous for the support to provide a plurality of defined support positions. There may be two or more than two, for example three or four, support positions are provided. In this case, the support positions may be designed approximately punctiform, or be designed as support surfaces or support areas. Furthermore, provision of the support positions may in particular mean that the support positions may be part of the support or positioning elements arranged on the support.

Thus, it can be provided that at least one support position by a on the frame arranged positioning element is configured. In this case, a particularly defined positioning of the mirror element and thereby an exact adjustability can be given, since the positioning of the mirror element can be substantially independent of any tolerances of the production of the frame. As positioning elements, in particular stiff elements can be used which do not deform during operation of the head-up display.

It is preferably provided that the support or the frame at least partially encloses the mirror element on the circumference present between the rear side and the functional side. Thus, the carrier or the frame in particular has a peripheral region which at least partially, for example completely, frame the mirror element at its circumference present between the rear side and the functional side and thereby cover it approximately. For example, the entire circumference of the mirror element present between the rear side and the functional side is covered by the frame or its peripheral area.

Thus, the support or the frame in addition to the support and the peripheral region, the at least partially framed, for example, completely, the mirror element at its existing between the back and functional side circumference, have. It is preferred that the frame can have an L-shaped cross-section through the arrangement of peripheral region and support.

From the above it is apparent that it is provided in particular that the mirror element rests with its functional side on the carrier by the functional side of the support, for example, at the support positions, rests.

The above-described embodiment of a mirror unit can have significant advantages over the solutions of the prior art.

Basically, by an embodiment as described above, according to which the functional side of the mirror element rests against the support, it is possible that an alignment of the mirror element can take place via its functional side and thus via the functional mirror surface. As a result, it can be made possible that the tolerance chain of the components which acts during an alignment and thereby adjustment or adaptation of the image is shortened. This allows a particularly accurate setting and the projected image can be further improved. Thus, it can be effectively ensured that an exact adaptation to drivers of different sizes can be realized.

Furthermore, the fact that the mirror element rests with its front side or functional side on the support or its support needs, the back of the mirror element in a measurement of the functional side, which may be realized by means of deflectometry, not separately observed. This can facilitate the measurement and thereby the manufacture of the mirror element.

Further, the positioning of the carrier with respect to the mirror element may be more accurate as the carrier aligns directly over the mirror element. Therefore, a particularly defined embodiment of the mirror element can be made possible and a secure hold of the mirror element can be realized.

The relative positioning of the mirror element to the bearings that are used for pivoting the mirror element, which approximately interact with the housing, as well as the relative position of the mirror element to a means for registering a pivoting movement, can also be more accurate, which in turn is advantageous for the projected image can.

Finally, the support for a mirror unit as described above can be configured with a low weight or a low mass, in particular in comparison to solid retaining elements of the prior art, to which the mirror element is fixed, for example adhesively bonded, to its rear side. As a result, the mirror unit can be produced with a particularly low susceptibility to vibration or susceptibility to vibration, which enables particularly precise adjustability and particularly sharp imaging. In addition, reduced mechanical susceptibility of the mirror unit can be reduced by a reduced susceptibility to vibration, which can increase the long-term stability of the mirror unit.

In particular, the carrier or its frame with the peripheral region can preferably prevent or at least significantly reduce disturbing reflections at the edges of the mirror element, at least partially, for example completely framed, on the circumference present between the rear side and the functional side. Thus, it can be further prevented or at least significantly reduced that the quality of the image is reduced by the reflections, which interfere with the projected radiation. This can in particular reduce the risk that a distorted image or a distorted projected image arises. This danger has existed in particular in the case of mirror elements from the state of the art which have dispensed with an aperture element and were fixed to a support, for example, only via their rear side, so that the circumference is exposed.

This disadvantage of the prior art can thus be overcome particularly effectively, in particular, if the peripheral region completely surrounds the mirror element at its circumference present between the rear side and the functional side, and, furthermore, the support is also arranged completely circumferentially. For then, in particular, the mirror edge of the functional side of the mirror element in the direction of the incident radiation L-shaped and thereby fully covered in the direction of the incident radiation.

Accordingly, it may be particularly preferred that the carrier consists of the frame. This is to mean in the sense of the present invention, in particular, that the carrier in particular the frame with the peripheral region, the support and corresponding functional periphery, such as means for pivoting the mirror element, but no support member is provided on the back of the mirror element. This can for example be realized by the carrier is designed in one piece. In particular, in this embodiment, a reduced mass of the carrier can be made possible, which reduces the susceptibility to vibration. Thereby, as described above, the projection of the image as well as the long-term stability can be improved.

It may further be preferred that the mirror element is fixed on its rear side with one or a plurality of elastic or stiff, that is inelastic, fixing means. In particular, in the case of elastic fixing means, it can be achieved that the reference between carrier and mirror element takes place via the front side or via the functional side, thus pivoting is transmitted to the mirror element via the functional side. As a result, a particularly accurate adjustability can be made possible, which in turn can improve the imaging quality. In addition, using rigid fixing means, a particularly secure hold and furthermore exact positioning can be made possible.

In addition, it can be made possible in particular with the use of elastic fixing means that with respect to different thermal expansion of mirror element and support or frame, a particularly advantageous fixation is possible. Because of the elastic fixing different thermal expansions can be easily compensated. As a result, stresses acting on the components can be reduced. The mirror unit can thereby be particularly long-term stable and also less susceptible to vibrations. This can improve the quality or sharpness of the projected image as well as the longevity.

With respect to the elastic fixing means, it may be preferable if they are selected from elastic clamping means, such as brackets, for example metal brackets, or elastic adhesives, such as elastic adhesive beads or also spring elements, such as leaf springs. These fixatives may have advantageous elasticity, so that the advantages described above may be particularly effective. In addition, a particularly secure fixation of the mirror element can be realized, which can further improve the long-term stability. It may be particularly preferred if the fixing means are provided opposite to the support positions. Because this can transmit a potentially exerted pressure on the mirror element on the support positions, which can reduce a burden on the mirror element.

With respect to the rigid or non-elastic fixing means, it may further be preferred that these comprise stiff clamping means or rigid adhesives. Such fixatives are usually simple in construction and can also be easily uncomplicated position or end. In particular, their positioning can be simple and error-free, so that a secure and long-term stable fixation of the mirror element is possible.

The advantages described above can be particularly effective when the support or the plurality of support positions are inelastic or stiff, so that they do not deform during operation. For in particular in this embodiment, it can be effectively made possible that a coupling of the mirror element and the carrier takes place via the functional side, but mechanical influences on the rear side are cushioned by the elasticity of the fixing means.

Particularly preferably, it can also be provided that the frame has two bearing faces on each of two opposing sides for pivotally supporting the mirror unit. In this embodiment, a particularly simple structure can be realized. In addition, it is possible, in particular in this embodiment, to realize a particularly low mass of the carrier. For one, bearing journals themselves have a low mass, whereby the mass of the carrier is only slightly increased by the journals. In addition, the Bearing of the mirror element in the outward direction, so that the frame can be adapted to the outer dimensions of the mirror element. This too can keep the mass of the carrier low. Thus, the vibration susceptibility of the mirror unit can be kept particularly low in this embodiment by maintaining a low mass, which, as detailed above, can improve the quality or sharpness of the projected image as well as the longevity.

It may further be provided that the frame is configured at least partially convex on at least one side having a bearing journal, for example on both sides having a bearing journal. In particular, the corresponding side or the corresponding sides may be plano-convex shaped and thus designed approximately semicircular or semi-oval. A semicircular shape should be understood to mean half of a circular shape, whereas a semi-oval shape should be understood to mean half an oval shape. In this embodiment, the carrier may have a particularly high rigidity. This in turn reduces the susceptibility to vibration, which, as detailed above, can improve the quality or sharpness of the projected image as well as longevity.

It may further be preferred that the frame has a reinforcing rib. In this case, a reinforcing rib can be understood as meaning, in particular, a section of this type which extends in a direction transversely to the surface of the functional side and projects therefrom. As a result, the rigidity of the frame can be increased, which in turn can improve the long-term quality. For example, the reinforcing rib may be arranged on the side where a member for transmitting a pivoting movement is provided, as described below. This is because a reinforcement can act where, where appropriate, swivel forces are entered. In addition, such a reinforcing rib, when configured as described above, may cover a potential gap which occurs upon pivoting of the mirror element, thus serving as an optical shutter. As a result, in addition to a high rigidity, the quality of the projected radiation can be improved.

It may further be provided that the frame has a pivot pin for transmitting a pivoting movement to the mirror unit. For example, the pivot pin may be provided on the side which connects the sides each having a journal. Comparable to the embodiment relating to the journals can be realized in this embodiment, a particularly simple structure. In addition, it is possible, in particular in this embodiment, to design a particularly low mass. For one, pivot pins themselves have a low mass, whereby the mass of the carrier is only slightly increased by the pivot pin. In addition, the pivot pin extends from the mirror element in the outward direction, so that the frame can be adapted to the outer dimensions of the mirror element. This too can keep the mass of the carrier low. Thus, the vibration susceptibility of the mirror unit can be kept particularly low in this embodiment by holding a small mass, which, as detailed above, can improve the quality or sharpness of the projected image as well as the longevity. According to the above should be understood by a pivot pin, a pin can attack on the about a driven by a motor adjusting mechanism and so can transmit a pivoting movement to the carrier or the mirror unit.

It may further be preferred that the functional side of the mirror element is free of protrusions or depressions. In this embodiment, the surface of the functional side can thus have a smooth or even surface. In particular, there are no attachment areas, such as locally bulged elevations, as is known in the art. In this embodiment, the production of the mirror element can be particularly simple, since a measurement of the functional side is significantly simplified, in particular compared to an embodiment in which the surface deviates from a planar geometry and projections or depressions, such as for a fixation of the mirror element provided are.

Furthermore, it may be preferred that the functional side of the mirror element has projections or recesses. In this embodiment, a positioning can be improved because the projections or fixings can interact with the support positions of the frame and so can make the positioning of the mirror element on its functional side to the frame more accurate. Accordingly, it can be provided that the projections or recesses can be adapted to the supporting positions, for example to the positioning elements with respect to the shape and size.

It may also be advantageous if the rear side of the mirror element has projections or recesses. The depressions or projections provided on the rear side can interact, for example, with the fixing means in order to to allow a particularly secure fixation of the mirror element to the frame. Correspondingly, the projections or recesses may be adapted to the fixing means in terms of shape and size.

It may also be preferred that the mirror element comprises glass or a plastic. In particular, mirror elements made of these materials can have good reflection properties if, for example, they are provided on the back with a corresponding coating, such as a metallic coating. In addition, it is difficult to integrate all the bearing geometries in a component in the required quality and accuracy of the projected image, especially in the plastic glass mirror elements. Therefore, in particular in this embodiment, the above-described mirror unit can offer the described advantages.

With regard to further advantages and features of the mirror unit, reference is made to the description of the head-up display and of the motor vehicle, and vice versa.

The invention also relates to a head-up display for a motor vehicle, comprising an imaging unit for emitting light beams for generating an image and having at least one mirror unit for reflecting the light beams emitted by the imaging unit, the mirror unit having a mirror element arranged on a carrier , characterized in that the mirror unit is configured as described in detail above.

The head-up display is arranged, for example, in a vehicle, such as in a motor vehicle. As such, the mirror unit may be disposed approximately within a housing into which radiation from the imaging unit, such as a backlit LCD display, is emitted. The housing may be arranged approximately in the dashboard of a motor vehicle. The radiation can represent an image when projecting onto an imaging surface. For example, it is known for head-up displays that information from driver assistance systems or a multimedia unit, such as instructions from a navigation system, such as driving direction or speed specifications, or information from a radio, or other selectable information or specifications as images, so graphic representations or texts. In this case, the mirror unit serves, in particular, to reflect the beams emitted by the imaging unit and, for example, to guide them in a defined manner onto a projection surface or imaging surface. In addition, the mirror unit can serve to enlarge an image and thus serve as a magnifying mirror. For example, serve as a projection screen called a combiner imaging screen or a windshield sliding a motor vehicle.

Accordingly, the mirror element is arranged in the optical beam path of the imaging unit or is part of the same, so that the radiation emitted by the imaging unit impinges on the mirror element and is reflected or forwarded therefrom.

In this case, the mirror element or in particular the carrier is arranged on a housing and stored there, in particular pivotally. As a result, the projection can be adapted to different drivers of the motor vehicle. For storage, it may be provided that, for example, a motor-based adjustment mechanism acts on the carrier.

Advantages of such a head-up display can be seen for example in a high quality of the projected image, improved adjustability and in a high longevity.

With regard to further advantages and features of the head-up display, reference is made to the description of the mirror unit and the motor vehicle, and vice versa.

Part of the invention is further a motor vehicle with a head-up display, wherein the head-up display is configured as described above.

Advantages of a vehicle with such a head-up display can be seen for example in a high quality of the projected image, improved adjustability and in a high longevity of the head-up display.

• 1 eine schematische Darstellung zeigend eine Ausgestaltung eines Head-up-Displays gemäß der vorliegenden Erfindung;
• 2 eine schematische Darstellung zeigend eine Ausgestaltung einer Spiegeleinheit für ein Head-up-Display gemäß 1 von schräg vorne;
• 3 eine schematische Darstellung zeigend eine Ausgestaltung eines Trägers für eine Spiegeleinheit gemäß 2 von hinten;
• 4 eine schematische Darstellung zeigend die Ausgestaltung des Trägers aus 3 für eine Spiegeleinheit gemäß 2 mit eingesetztem Spiegelelement von hinten;
• 5 eine schematische Darstellung zeigend die Ausgestaltung des Trägers aus 3 für eine Spiegeleinheit gemäß 2 mit eingesetztem und fixiertem Spiegelelement von hinten; und
• 6 eine schematische Darstellung zeigend die Ausgestaltung des Trägers aus 3 für eine Spiegeleinheit gemäß 2 mit eingesetztem und zu 5 anderweitig fixiertem Spiegelelement von hinten.

Further advantages and advantageous embodiments of the subject invention are illustrated by the drawings and explained in the following description. It should be noted that the drawings have only descriptive character and are not intended to limit the invention in any way. Show it

• 1 a schematic representation showing an embodiment of a head-up display according to the present invention;
• 2 a schematic representation showing an embodiment of a mirror unit for a head-up display according to 1 from diagonally forward;
• 3 a schematic representation showing an embodiment of a support for a mirror unit according to 2 from the back;
• 4 a schematic representation showing the embodiment of the carrier 3 for a mirror unit according to 2 with inserted mirror element from behind;
• 5 a schematic representation showing the embodiment of the carrier 3 for a mirror unit according to 2 with inserted and fixed mirror element from behind; and
• 6 a schematic representation showing the embodiment of the carrier 3 for a mirror unit according to 2 with inserted and too 5 otherwise fixed mirror element from behind.

1 shows a schematic representation showing an embodiment of a head-up display 10 according to the present invention.

Such a head-up display 10 is used in particular for use in a motor vehicle, such as a passenger car. In this case, the head-up display 10 may be arranged approximately in the dashboard of the motor vehicle. The head-up display includes an imaging unit 12 for emitting light beams for generating an image. The light beams are thus formed and emitted in such a way that a desired image can be projected onto an imaging surface or projection surface. For example, it is known for head-up displays 10 that, for example, information from driver assistance systems or a multimedia unit can be displayed. For example, can be mentioned here hints from a navigation system, such as driving direction specifications or speed specifications, or even information from a radio, or other illustrations, ie graphical representations or texts.

For example, serve as a projection screen called a combiner imaging screen, in which case the projection surface part of the head-up diplays 10 can be. In the illustrated embodiment, however, the image may be projected onto the windshield of the motor vehicle, in which case the projection surface is not part of the head-up display 10 is.

The imaging unit 12 can in a housing 14 be arranged or the radiation for projection of an image in the housing 14 radiate. In the case 14 can also be a mirror 16 be provided, the radiation to a mirror unit 18 forwards or reflects. The mirror 16 may be used, for example, when the imaging unit 12 the radiation, for example due to geometric conditions, not directly to the mirror unit 18 can send. Furthermore, the mirror 16 In the case of reflection, the radiation already increases or otherwise influences in order to enable a high-quality imaging.

Like the mirror 16 can the mirror unit 18 in the case 14 be arranged. Accordingly, the mirror unit 18 in the optical path of the imaging unit 12 arranged or is part of the same, so that by the imaging unit 12 emitted radiation on the mirror unit 18 meets and is reflected from there or forwarded. As an imaging unit 12 can be used in a conventional manner a backlit LCD display use. In particular, the beam path extends from the mirror unit 18 to an imaging surface or projection surface, as already described above.

The mirror unit 18 is described in detail in the following figures, wherein the same or comparable components are provided with the same reference numerals.

As stated above, the mirror unit is used 18 in particular, that of the imaging unit 12 To reflect emitted radiation and thus to conduct in a defined manner on a projection surface or imaging surface. For this purpose, the mirror unit 18 one on a carrier 20 arranged mirror element 22 with a back 24 and a functional page 26 on. The mirror element 22 indicates on its functional side 26 reflective properties. For example, the mirror element 22 be made of glass or a plastic and on its back 24 an approximately metallic coating 28 respectively. Furthermore, the mirror element can 22 be curved. In the embodiment shown, the mirror element 22 curved so that it is on its functional side 26 is concave. It can also be seen that the functional side 26 of the mirror element 22 is free of protrusions or depressions, that has a smooth or even surface.

Regarding the vehicle 20 this is designed as a frame element. Thus, the carrier comprises a frame 21 , the one opening 32 framed. The frame 21 serves to fix the mirror element 22 whereas the opening 32 this serves the function page 26 of the mirror element 22 exposed and with the imaging unit 12 emitted rays can interact.

The frame 21 has a peripheral area 30 on, the mirror element 22 at the back between 24 and functional side 26 enclosing existing scope. Furthermore, the frame comprises 21 an edition 46 that serves to there the function page 26 of the mirror element 22 to position so that the mirror element 22 with its functional side 26 on the pad 46 may be present, as described in detail below.

In order to change the projection of the image on an imaging surface, as described in detail above, and in particular to be able to adapt to the size of different drivers of the motor vehicle, it is provided that the mirror element 22 is mounted pivotably about an axis. For this purpose, it is provided that the carrier 20 or the frame 21 Means for pivoting the mirror unit 18 around an axis.

In particular, in 2 shown that the frame 21 on two opposite sides arranged 39 . 41 one bearing journal each 38 for pivotally supporting the mirror unit 18 having. The journals 38 define the axis around which the mirror unit 18 is pivotable. In particular, the journals 38 in corresponding receptacles in the housing 14 rotatably mounted, so that by a rotation of the bearing pin 38 the mirror unit 18 can be swiveled. In this case, the pivot axis is in particular designed or aligned in such a way that the image projected onto the imaging surface is changed such that, when it is arranged in a head-up display 10 in a motor vehicle, it is adapted to the size of a driver.

To trigger a pivoting movement, the carrier points 20 or the frame 21 a pivot 40 on. The pivot pin 40 can be about one in the case 14 arranged kinematics be connected, which is driven approximately motor-based. Due to the kinematics of the pivot pin 40 be moved, so that due to the pivotal mounting of the mirror unit 18 through the journals 38 a pivoting of the mirror element 22 and correspondingly changing the image from the imaging unit 12 emitted beam path and therefore an adjustment of the image is made possible.

It is further shown that the carrier 20 or the frame 21 is formed geometrically such that a high rigidity is achieved. For this purpose, it is for example provided that the frame to the one journal 38 having pages 39 . 41 at least partially convex, in particular plano-convex, is configured. In particular, the journals 38 having pages 39 . 41 semi-oval shaped, wherein the arcuate shape shows the oval shape and a straight side shows a separation of the oval shape. As a result, a reduced susceptibility to vibration can be made possible.

In addition, it is intended that the frame 21 a reinforcing rib 42 has, which can serve equally as optical cover. In detail, the reinforcing rib 42 the stiffening of the carrier 20 promote further, so that the susceptibility to vibration can be further improved, which in turn can improve the long-term quality. It can be seen that the reinforcing rib 42 on the side 43 is arranged where the pivot pin 40 is provided. As a result, a gain can act where, where appropriate, swivel forces are entered. In addition, such a reinforcing rib 42 when they are in a direction transverse to the surface of the functional side as shown 26 runs, a potential gap cover, the pivoting of the mirror element 22 occurs. As a result, in addition to a high rigidity, the quality of the projected radiation can be improved.

In the 3 is the back of the carrier 20 shown, wherein a mirror element 22 is not provided. It is shown in particular that the edition 46 a plurality of defined support positions 44 for arranging the function page 16 of the mirror element 22 has, so that the mirror element 22 with its functional side 26 at the support positions 44 can be present. According to 3 are four supporting positions 44 provided, three of which are shown and one is hidden. The circulation positions 44 are part of the edition 46 or arranged at this. For example, the support positions 44 stiff.

It can be seen that the carrier 20 or the frame 21 has an L-shaped cross-section. This is realized by the perimeter area 30 that is the mirror element 22 at his between back 24 and functional side 26 Existing scope also framed the edition 46 has, which are arranged such or aligned with each other, that an L-shaped cross section is formed. This shows the simple structure of the carrier 20 , which may for example be designed in one piece or in one piece and only the frame 21 may or may consist of this.

By doing that the frame 21 through its peripheral area 30 and the edition 46 has an L-shaped cross section, it becomes possible, the mirror element 22 from the back of the carrier 20 to place and fix in these, as described in detail below.

By resting the mirror element 22 on the carrier 20 via the function page 26 It can be achieved that an adjustability of the mirror element 22 acts on the function page. This can reduce the tolerance chain of the relevant components and make a setting particularly accurate.

In the 4 is further shown that the mirror element 22 in the carrier 20 is arranged. In this case, the mirror element 22 at its back 24 fixing areas 48 on, which may be positioned so that these above the support positions 44 are arranged. These can in particular for a fixation of the mirror element 22 be provided, as shown in the following figures.

Especially in the 5 and 6 is shown that the mirror element 22 at its back 24 with one or a plurality of elastic fixatives 50 is fixed. As a result, on the one hand effects can be compensated, which are based on different thermal expansion coefficients. This can be advantageous, in particular, in the case of a head-up display 10, since in some cases extreme temperature differences can occur here. For example, in a vehicle that is exposed to direct sunlight in the summer, temperatures of 60 ° C or more occur, whereas in winter sometimes high minus degrees can occur.

Regarding the fixation of the mirror element 22 shows 5 that the fixative 50 as glue beads 52 are designed. adhesive beads 52 are, for example, cylindrical shape or semicircular and also elastic, such as sponge-like, designed and provided with a suitable adhesive. This can cause adhesive beads 52 be arranged in a simple way and with your adhesive facing the back 24 of the mirror element 22 and the peripheral area 30 touch and so the mirror element 22 fix elastically.

In contrast, shows 6 that the fixative 50 as elastic braces 54 are designed. The brackets 54 can do it on the back 24 of the mirror element 22 with the fixing areas 48 interact in such a way that can be configured as depressions or elevations. Furthermore, the frame 21 , a holding element 56 have, so the brackets 54 between the back 24 of the mirror element 22 and the holding element 58 can be trapped. This allows the brackets 54 the mirror element 22 fix elastically.

LIST OF REFERENCE NUMBERS

10

Head-Up Display

12

imaging unit

14

casing

16

mirror

18

mirror unit

20

carrier

21

frame

22

mirror element

24

back

26

function page

28

coating

30

peripheral region

32

opening

38

pivot

39

page

40

pivot pin

41

page

42

reinforcing rib

43

page

44

support position

46

edition

48

fusing

50

fixer

52

adhesive bead

54

clip

56

retaining element

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been 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.

Cited patent literature

• WO 2016/186034 A1 [0004]
• WO 2016/001313 A1 [0005]

Claims (15)

Mirror unit for a head-up display (10) for reflecting radiation emitted by an imaging unit (12), wherein the mirror unit (18) has a mirror element (22) with a functional side (26) and a rear side (24) attached to one another Support (20) is fixed, wherein the carrier (20) comprises means for pivoting the mirror unit (18) about at least one axis, characterized in that the carrier (20) is designed as a frame member and a frame (21), wherein the Frame (21) has a support (46) for arranging the functional side (26) of the mirror element (22), so that the mirror element (22) rests with its functional side (26) on the support (46). Mirror unit after Claim 1 , characterized in that the carrier (20) consists of the frame (21). Mirror unit according to one of Claims 1 or 2 , characterized in that the frame (21) comprises a peripheral region (30) which at least partially encloses the mirror element (22) on the circumference present between the rear side (24) and the functional side (26). Mirror unit according to one of Claims 1 to 3 , characterized in that the mirror element (22) on its rear side (24) with one or a plurality of elastic or rigid fixing means (50) is fixed to the carrier (20). Mirror unit after Claim 4 , characterized in that the fixing means (50) comprise elastic or rigid clamping means, elastic or rigid adhesives, or spring elements. Mirror unit according to one of Claims 1 to 5 , characterized in that the support (46) provides a plurality of defined support positions (44). Mirror unit after Claim 6 , characterized in that at least one support position (44) by a on the frame (21) arranged positioning element is configured. Mirror unit according to one of Claims 1 to 7 , characterized in that the frame (21) on two oppositely disposed sides (39, 41) each have a bearing pin (38) for pivotally supporting the mirror unit (18). Mirror unit after Claim 8 , characterized in that the frame (21) on at least one bearing pin (38) having side (39, 41) is at least partially convex. Mirror unit according to one of Claims 1 to 9 , characterized in that the frame (21) comprises a pivot pin (40) for transmitting a pivoting movement to the mirror unit (18). Mirror unit according to one of Claims 1 to 10 , characterized in that the functional side (26) of the mirror element (22) is free of protrusions or depressions. Mirror unit according to one of Claims 1 to 10 , characterized in that the functional side (26) of the mirror element (22) has projections or recesses. Mirror unit according to one of Claims 1 to 12 , characterized in that the rear side (24) of the mirror element (22) has projections or recesses. A head-up display for a motor vehicle, comprising an imaging unit (12) for emitting light beams to produce an image and comprising at least one mirror unit (18) for reflecting the light beams emitted by the imaging unit (12), the mirror unit (18) on a support (20) arranged mirror element (22), characterized in that the mirror unit (22) is designed according to one of Claims 1 to 8th , Motor vehicle with a head-up display (10), characterized in that the head-up display (10) according to Claim 9 is designed.

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