EP3326022A1

EP3326022A1 - Projection apparatus for a head-up display and method for operating a projection apparatus for a head-up display

Info

Publication number: EP3326022A1
Application number: EP16744324.1A
Authority: EP
Inventors: Sezgin Goekcen
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2015-07-20
Filing date: 2016-07-08
Publication date: 2018-05-30
Also published as: DE102015213574A1; CN107850785A; WO2017012894A1

Abstract

The invention relates to a projection apparatus (100) for a head-up display comprising a housing with a housing opening for passing a light beam representing a virtual image. The projection apparatus (100) comprises a combiner holder (104) for holding a combiner pane (106). The combiner holder (104) is rotatably arranged or arrangeable in the housing between a projection position, in which the combiner pane (106) projects the light beam into a viewing region of a driver, and a closed position, in which the combiner pane (106) is lowered in the housing (1100). Moreover, the projection apparatus (100) comprises a guide device (102) with at least one guide rail (108) for guiding a cover element (110) for covering the housing opening. The cover element (110) is arranged or arrangeable in a rotatable and/or displaceable manner in the guide rail (108). The guide rail (108) is formed to guide a main direction-of-extent plane of the cover element (110) substantially parallel to a main direction-of-extent plane of the combiner pane (106). Furthermore, the projection apparatus (100) comprises a drive mechanism (112) for synchronizing a movement of the cover element (110) with a movement of the combiner holder (104). The drive mechanism (112) has at least one first downward-driving element (118) coupled to the cover element (110), a second downward-driving element (120) coupled to the combiner holder (104) and a drive element (116) engaging with the first downward-driving element (118) and the second downward-driving element (120).

Description

Description title

Projection device for a head-up display and method for operating a projection device for a head-up display

State of the art

The invention is based on a device or a method

Type of independent claims. The subject of the present invention is also a computer program.

Head-up display systems, called HUD systems for short, are used to generate visual information such as speed or navigation information in the field of a driver's field of vision. This is usually done via the projection of an electronically generated image on a display in the

Viewing area using optical elements such as mirrors or lens elements.

Conventional head-up display systems use, for example, the vehicle-mounted windshield for optical image generation. Furthermore, systems are known which use an additional disc, also called combiner disc or short combiner, instead of the windshield for this purpose. Such systems are also referred to as combiner head-up display systems or short CHUD systems.

In most cases, the combiner disk is movably mounted on the combiner head-up display via an additional holder, also called a combiner holder. This storage makes it possible to fold the combiner disc when not using the combiner head-up display and thus swing out of the driver's field of vision. The Combinerscheibe can be covered, for example, in the folded state via an additional flap, which serves to the Combinerscheibe against contamination protect or reflections between light sources, combiner disc and possibly a vehicle glazing to avoid.

Disclosure of the invention

Against this background, the approach presented here becomes one

Projection device for a head-up display, a method for operating a projection device for a head-up display, a control unit that uses this method, and finally a corresponding

Computer program presented according to the main claims. The measures listed in the dependent claims are advantageous

Further developments and improvements of the device specified in the independent claim possible. A projection apparatus for a head-up display is presented, wherein the head-up display comprises a housing having a housing opening for passing a light beam representing a virtual image, the projection apparatus comprising: a combiner holder for holding a combiner disc, wherein of the

Combiner holder rotatable between a projection position in which the

Combinerscheibe projected the light beam in a field of view of a driver, and a closure position in which the Combinerscheibe is recessed in the housing, disposed in the housing or can be arranged; a guide device having at least one guide rail for guiding a cover element for covering the housing opening, wherein the

Cover member is rotatably and / or slidably disposed in the guide rail or can be arranged, wherein the guide rail is formed to a

Main extension plane of the cover substantially parallel to a

Main extension plane of the combiner disc to lead; and a drive mechanism for synchronizing movement of the

Cover member with a movement of the Combinerhalters, wherein the

Drive mechanism at least one coupled to the cover first Output element, a second coupled to the combiner holder

Output element and a in the first output element and the second

Has output element engaging drive element. A head-up display can be understood as a display device for displaying a virtual image in a driver's field of vision. A projection device can be understood to mean a component of the head-up display whose function is to control the light beam, i. H. the virtual image to redirect into the field of view. The projection device can be arranged or be arrangeable in the housing, wherein the housing in a

Dashboard of the vehicle can be integrated or integrated. The housing opening may be facing, for example, a windshield of the vehicle in the installed state of the housing. Under a Combinerscheibe can be understood a translucent, especially transparent projection surface for targeted deflection of the light beam. The combiner disc can be rigidly connected to the combiner holder. Under a cover can be understood a flat, in particular rigid element. For example, depending on the embodiment, the cover element may be designed as a single-part or multi-part plate. Is this

Covering multi-part, so individual segments of the cover can be movably connected to each other.

The guide rail can be about as elongated depending on the embodiment

Survey or depression be realized. Here, the cover plate may be formed with a contour of the survey or depression corresponding counter contour, which allows anchoring of the cover plate with the guide rail. The guide means and the drive mechanism may be configured such that the cover member the housing opening in the

Release projection position and closes in the closed position.

For example, in the projection position, the cover element can be arranged so far laterally offset from the combiner disc that the

Combiner disc is not covered by the cover. Corresponding the combiner disc and the cover can be arranged opposite each other in the closed position. The movement of the

Combiner holder, and thus the Combinerscheibe, may be a substantially rotational movement, while the movement of the cover, in particular a combination of a rotarische and a translatory

Can be movement.

The drive mechanism can be realized as a transmission. Correspondingly, for example, a wheel, in particular a toothed wheel, or a segment of such a wheel can be understood by a drive or driven element. The

Drive element may for example be rotatably mounted in the guide device. For example, the combiner holder and the second output element can be realized in one piece. The drive element may be coupled to a corresponding drive device such as an electric motor and be realized as a drive pinion.

The approach described here is based on the recognition that it is possible by the use of a simple, robust drive mechanism, such as in the form of an intermediate gear, a rotational movement of a

Combiner disc with a rotary or sliding movement of a cover to

Cover a head-up display housing to couple. For this purpose, the combiner as well as the cover may be coupled to the drive mechanism, wherein the drive mechanism may in particular be connected, for example via a guide lever with the cover and thereby can move. It can be one or more parts depending on the embodiment

Cover be slidably mounted in a guide rail. Thus, a shift of the cover can be coupled directly to the rotary motion of the combiner. For this purpose, for example, a first side portion of the cover may be mounted in the guide rail, while a first side portion opposite the second side portion of the cover disposed outside the guide rail, connected to the guide lever and can be guided by this. The side sections may be, for example, edges or edges of the cover extending substantially transversely to a direction of displacement of the cover. The guide lever may for example be connected to a corner of the cover. Such a projection device offers the advantage of a low

Complexity and a good adaptability to unfavorable space conditions, especially in connection with the use of a relatively large-area coverage. Thus, it is possible, for example, a relatively large

Close housing opening with stiff cover elements.

Furthermore, this can be a movement with rapid opening and closing movement of the moving elements can be realized, with the respective opening movements of the combiner and the cover can run simultaneously, d. h., the cover does not have to be opened to a certain extent before the combiner can be turned.

Another advantage is that the kinematic coupling can be designed by as few elements as possible. For example, the cover can be realized with a few cover elements, in particular with only one element.

Thus, the projection device can be constructed according to simple and inexpensive, especially if this, depending on the space a one-piece

Cover is used. The combined drive of combiner and cover via a single drive unit, depending on the embodiment by means of a lever coupling, can be relatively easily realized. Due to the smaller number of movable components and the robustness of

Projection device against vibrations or errors are increased. In particular, a one-piece cover has the advantage that it is very quiet during the movement.

According to one embodiment, the projection device may comprise at least one guide lever for coupling the cover element to the first

Have output element. In particular, the guide lever can be rotatably attached to the guide device. Depending on the embodiment, in addition or alternatively, the cover may be rotatably connected to a first end of the guide lever or the first output member rotatably disposed at a second end of the lever. The first output element and the guide lever can optionally be made in one piece. Under a

Guide lever can be understood as a connecting element in the form of a pendulum rod or a pendulum rod-like connecting element. Depending on the embodiment, the guide lever may be straight or bent, symmetrical or asymmetrical. By this embodiment, a stable and relatively easy and inexpensive to implement

Coupling of the drive mechanism and the cover allows.

Furthermore, it is advantageous if the projection device has at least one further guide lever. In this case, the drive mechanism may have at least one third output element, which may be non-rotatably connected via a shaft to the first output element. The cover member may be coupled via the further guide lever with the third output element. In particular, depending on the embodiment, the further guide lever can be rotatably attached to the guide device, the shaft can be rotatably mounted in the guide device, the cover element can be rotatably connected to a first end of the further guide lever or the third

Output element rotatably disposed at a second end of the further guide lever. Additionally or alternatively, the third output element and the further guide lever may be made in one piece. As a result, the stability of the articulation of the cover can be significantly increased and thus a permanently reliable operation of the projection device can be ensured.

It is particularly favorable if the combiner holder between the

Guide lever and the other guide lever is arranged or can be arranged. As a result, the projection device can be realized as compact as possible.

According to a further embodiment, the combiner holder can be rotatably mounted in the guide device. In this case, the guide device can be fastened in the housing. By this embodiment can be dispensed with additional parts for storage of the combiner holder.

Furthermore, the guide means may be mounted on the combiner holder. Such an arrangement has the advantage that the guide device and thus the cover element guided therein can be very easily rotated simultaneously with the combiner holder.

The guide rail may at least partially have a curved course. As a result, the guide device can be flexible

be adapted to different space conditions. Furthermore, the cover element can thereby be additionally tilted when moving in the guide rail depending on the course of the guide rail. It is also advantageous if the guide device according to another

Embodiment has at least one further guide rail. In this case, the cover can also be arranged rotatably and / or displaceable in the other guide rail or be arrangeable. In particular, a first edge region of the cover element in the guide rail and a second edge region of the cover element lying opposite the first edge region can be arranged or arranged in the further guide rail. Also by this embodiment, a particularly stable, vibration-insensitive guidance of the cover is made possible along the Combinerscheibe. The cover element may have at least one rack segment, wherein the drive mechanism may comprise at least one rack drive element. The rack segment can over the at least one

Rack drive element to be coupled to the first output element. Such a drive of the cover provides the advantage of high mechanical robustness and thus low wear.

According to a further embodiment, the cover can be designed as a rigid plate. Such a cover can be special

be provided inexpensively and offers the advantage of high stability.

The projection device can also have a drive device for driving the drive element. The drive device may be, for example, an electric motor. By this embodiment, the combiner holder and the cover can be driven continuously and synchronously with each other. The approach described here also provides a method for operating a projection apparatus according to one of the preceding embodiments, the method comprising the following steps:

Providing a control signal for controlling a drive means for driving the drive member to adjust the Combinerhalter synchronously with the cover member between the closed position and the projection position.

This method can be implemented, for example, in software or hardware or in a mixed form of software and hardware, for example in a control unit.

The approach presented here also provides a control unit which is designed to implement the steps of a variant of a method presented here

to implement, control or implement appropriate facilities. Also by this embodiment of the invention in the form of a control device, the object underlying the invention can be achieved quickly and efficiently.

In the present case, a control device can be understood as meaning an electrical device which processes sensor signals and outputs control and / or data signals in dependence thereon. The control unit may have an interface, which may be formed in hardware and / or software. In a hardware training, the interfaces may for example be part of a so-called system ASICs, the various functions of the

Control unit includes. However, it is also possible that the interfaces are their own integrated circuits or at least partially consist of discrete components. In a software training, the

Interfaces software modules that are available for example on a microcontroller in addition to other software modules.

Also of advantage is a computer program product or computer program with program code which is stored on a machine-readable carrier or storage medium may be stored as a semiconductor memory, a hard disk memory or an optical memory and is used to carry out, implement and / or control the steps of the method according to one of the embodiments described above, in particular when the program product or program is executed on a computer or a device.

Embodiments of the invention are illustrated in the drawings and explained in more detail in the following description. It shows:

1 shows a schematic representation of a projection device according to an embodiment;

2 is a schematic representation of a projection device according to an exemplary embodiment in the closed state;

FIG. 3 shows a schematic illustration of a projection device from FIG. 2 in the half-opened state; FIG.

FIG. 4 shows a schematic representation of a projection device from FIG. 2 in the opened state; FIG.

5 shows a schematic representation of a projection device according to an exemplary embodiment in the closed state;

FIG. 6 shows a schematic illustration of a projection device from FIG. 5 in the half-opened state; FIG.

FIG. 7 shows a schematic illustration of a projection device from FIG. 5 in the opened state; FIG.

8 is a schematic representation of a projection device according to an exemplary embodiment in the closed state; FIG. 9 shows a schematic illustration of a projection device from FIG. 8 in the half-opened state; FIG.

FIG. 10 shows a schematic illustration of a projection device from FIG. 8 in the opened state; FIG.

11 is a schematic representation of a built-in housing of a head-up display projection device according to an embodiment in the closed state;

FIG. 12 shows a schematic illustration of a projection device from FIG. 11 in the closed state; FIG.

13 is a schematic representation of a built-in housing of a head-up display projection device according to an embodiment in the closed state;

FIG. 14 shows a schematic illustration of a projection device from FIG. 13 in the half-opened state; FIG.

FIG. 15 shows a schematic representation of a projection device from FIG. 13 in the opened state; FIG.

16 is a schematic representation of a section through a housing of a head-up display with built-in projection device according to a

Embodiment in the open state;

17 shows a schematic illustration of a guide device mounted on a combiner holder according to an exemplary embodiment;

FIG. 18 shows a schematic illustration of a guide device from FIG. 17; FIG.

19 shows a schematic representation of a built-in housing of a head-up display projection device according to an embodiment in the open state. 20 shows a schematic representation of a built-in housing of a head-up display projection device according to an embodiment in the open state.

21 is a schematic representation of a built-in housing of a head-up display projection device according to an embodiment in the half-open state.

22 is a schematic representation of a built-in housing of a head-up display projection device according to an embodiment in the closed state;

FIG. 23 shows a schematic illustration of a projection device from FIG. 22 in the closed state; FIG.

FIG. 24 shows a schematic illustration of a combiner head-up display; FIG. and

25 is a flow chart of a method for operating a

Projection device according to one embodiment.

In the following description of favorable embodiments of the present invention are for the in the various figures

represented and similar elements acting the same or similar

Reference numeral used, wherein a repeated description of these elements is omitted.

1 shows a schematic representation of a projection device 100 according to an exemplary embodiment. The projection device 100 is suitable for installation in a housing for a head-up display and is realized according to this embodiment with a rotatably mounted in a guide device 102 Combinerhalter 104 for holding a Combinerscheibe 106. The combiner disk 106 serves to deflect a light beam representing a virtual image into a viewing area of a viewer of the head-up display. In Fig. 1, the combiner holder 104 is in a projection position shown, in which the Combinerscheibe 106 is deployed such that a falling on the Combinerscheibe light beam is projected into the field of view. By rotating the combiner holder 104, the combiner disc 106 can be moved between the projection position and a closed position in which the combiner disc 106 is sunk in the housing.

The guide device 102 has an exemplary S-shaped guide rail 108 here, which serves to guide a cover element 110 for covering a housing opening of the housing. When moving the cover member 110 along the guide rail 108, the cover member

110 is guided substantially parallel to the combiner disc 106. The

Cover element 110 is further connected by means of suitable bearing elements articulated with the guide rail 108, so that the cover member 110 during

Moving can be tilted at the same time. According to FIG. 1, this is

Covering element 110 as a two-part plate from a larger

Plate segment and a movably connected to the larger plate segment smaller plate segment realized.

To the rotational movement of the combiner holder 104, and thus the

Combiner disc 106, with the rotational and translational movement of the

Coupling cover member 110 such that the cover 110 moves synchronously to open or close the Combinerscheibe 106, the projection device 100 is realized with a corresponding drive mechanism 112, which according to the embodiment shown in Fig. 1 by means of a shaft 114 rotatable in the guide device 102 stored

Drive element 116, here a drive wheel, and a first output element 118 and a second output element 120 in the form of two wheel segments, wherein the two output elements 118, 120 respectively engage in the drive element 116 and as the shaft 114 are rotatably mounted in the guide device 102. As can be seen in FIG. 1, the first output element 118 is as

Part realized in the guide device 102 rotatably mounted guide lever 122, whose remote from the first output member 118 end is pivotally connected to the cover 110. The guide lever 122 is configured drop-shaped example in Fig. 1. The drive element 116 is by means of an optional drive means 124, which exemplifies a Drive unit in the form of an electric motor and a suitable transmission, driven. Characterized in that the drive element 116 engages simultaneously in the two output elements 118, 120, the combiner holder 104 and the cover 110 can be moved simultaneously and continuously when activating the drive means 124 by an opposite rotational movement of the two output elements 118, 120. Three arrows mark the respective ones

Direction of rotation of the two output elements 118, 120 and the drive element 116 when moving the combiner holder 104 in the closed position.

According to this exemplary embodiment, an optional further drive element 126, which engages in an optional third output element 128, is seated on the shaft 114. The third output element 128 is part of an optional further guide lever 130, which is rotatably mounted analogously to the guide lever 122 in the guide device 102 and whose end is also hingedly connected to the cover 110. As can be seen in FIG. 1, the two guide levers 122, 130 are mounted on mutually opposite inner walls of the guide device 102, the combiner holder 104 being arranged between the two guide levers 122, 130 so that they can be moved laterally past the combiner disk 106.

The guide device 102 is used according to an embodiment for securing the protection device 100 in the housing mentioned above.

The drive device 124 can be controlled by a control unit 132 connected to the drive unit. For this purpose, the control device 132 generates a corresponding control signal 134 for controlling the drive unit.

The rotational movement of the combiner holder 104 is according to a

Embodiment via an intermediate gear as a drive mechanism 112 to the guide lever 122, 130 transmitted. The drive mechanism 112 consists of about a drive gear, an engaging in the drive gear intermediate gear 116 for direction reversal and at least one output gear 118, 120. The output gear 118 together with the guide lever 122 is a rigid unit. The design of the gear ratio depends on the space and movement conditions and should allow a collision-free movement.

According to one embodiment, the guide levers 122, 130 are each connected via a pivot bearing to the cover 110. Ideally, this pivot bearing is located on an end of the cover element 110 facing the drive mechanism 112. Another end of the cover element 110 is approximately free over an outline along a guide rail 108

predetermined path movably mounted, for example by means of a hinged sliding bearing. The guide rail 108 has a curve adapted to an available installation space and allows a

Lowering the cover 110 in the open state of

Projection device 100 in a corresponding housing of a combiner head-up display, as described in more detail below. The

Covering element 110 is, for example, via a pin within the

Guide rail 108 stored.

Is it not possible due to the space situation, a one-piece

To use cover, as an alternative, a two- or multi-part design of the cover 110 is conceivable, wherein the individual segments of the cover 110 are slidably mounted on the guide rail 108. A the driving mechanism 112 facing portion of the cover 110 is also in this case via a pivot bearing with the

Guide lever 122 and the other guide lever 130 and not stored in the guide rail 108.

Through this mechanism it is possible to control the rotational movement of the

Combiner holder 104 to convert over relatively few components in a sliding movement of the cover 110.

FIG. 2 shows a schematic representation of a projection device 100 according to an exemplary embodiment in the closed state. Of the

closed state corresponds for example to the closure position described in connection with FIG. By way of example, the projection apparatus 100 is one described with reference to FIG. 1 Projection device. The guide rail 108, the cover element 110 coupled to the drive element 116 via the guide lever 122 and the first output element 118 disposed thereon, and the combiner disk coupled to the drive element 116 via the combiner holder not shown here with the second output element 120 arranged thereon, can be seen

106. The drive element 116 is realized, for example, as an intermediate pinion, while the two output elements 118, 120 are realized as wheel segments. In the closed state of the projection device 100 shown in FIG. 2, in which the combiner disk 106 is covered by the cover element 110, the cover element 110 and the combiner disk 106 are arranged substantially parallel to one another.

The guide rail 108 is movably connected, for example, via an articulated sliding bearing with a bearing element marked with a circle in the outer region of the cover element 110.

FIG. 3 shows a schematic illustration of a projection device 100 from FIG. 2 in the half-open state. Even in the half-open state of

Projection device 100, the cover 110 and the

Combiner disc 106 arranged approximately parallel to each other.

FIG. 4 shows a schematic representation of a projection device 100 from FIG. 2 in the opened state. Again, the cover 110

Combiner 106 arranged substantially parallel to each other. The opened state corresponds for example to the projection position described in connection with FIG.

5 shows a schematic representation of a projection device 100 according to an exemplary embodiment in the closed state. The

Projection device 100 essentially corresponds to the projection device described with reference to FIGS. 2 to 4, with the difference that the cover element 110 according to this embodiment is designed as a multipart

Cover with a smaller segment 500 and a hingedly connected to the smaller segment 500 larger segment 502 is executed. The segments 500, 502 are displaceably mounted on the guide track of the guide rail 108 via individual bearing elements 503 marked with a circle. The guide lever 122 thereby drives the movement of the

Cover element 110 at. The connection of the guide lever 122 to the cover 110 is carried out for example via a likewise marked with a circle pivot bearing 504 on the larger segment 502. The closed state shown in Fig. 5 substantially corresponds to the closed state of the projection device 100 described with reference to FIG.

FIG. 6 shows a schematic illustration of a projection device 100 from FIG. 5 in the half-open state. The half-open state shown in FIG. 6 essentially corresponds to the half-opened state shown in FIG. 3.

FIG. 7 shows a schematic representation of a projection device 100 from FIG. 5 in the opened state. The opened state shown in FIG. 7 essentially corresponds to the opened state described with reference to FIG. 4.

8 shows a schematic representation of a projection device 100 according to an exemplary embodiment in the closed state. In the

Projection device 100 can be a multi-part projection device described above with reference to FIGS. 1 and 5 to 7

Cover element 110 act. FIG. 8 shows the projection device 100 similar to FIG. 5 in the closed position. Evident are the guide rail 108 and a further guide rail 800, wherein the cover 110 is slidably disposed between the two guide rails 108, 800. Here, the shape of the realized by means of the two guide rails 108, 800 rail mounting of the cover 110 is adapted to an available space. The further guide lever 130, which can be seen here, is rotatably mounted and coupled directly to a rotary movement of the combiner holder 104 via an intermediate gear as the drive mechanism. Thus, the further guide lever 130 functions as a driving element for pulling or pushing the cover member 110.

Analogously to FIGS. 6 and 7, the projection apparatus 100 is shown in FIG. 9 in the half-opened state and in FIG. 10 in the opened state. FIG. 11 shows a schematic representation of a projection device 100 installed in a housing 1100 of a head-up display according to a

Embodiment in the closed state, such as one

Projection device, as described above with reference to Figures 1 to 10. By way of example, the housing 1100 with a two-part construction comprising a base element 1102 and a cover element 1104 which can be latched to the floor element 1102 is provided with a housing opening 1106 for the housing

Passing through a light beam representing a virtual image realized. In the closed position shown in FIG. 11, the housing opening 1106 is completely closed by the cover element 110, here by way of example a two-part cover element.

FIG. 12 shows the projection device 100 from FIG. 11 in the opened state, ie. H. in the projection position, in which the Combinerscheibe 106 from the

Housing 110 is folded out so far that the guided through the housing opening 1106 light beam is directed over the Combinerscheibe 106 in the field of view of the driver.

FIG. 13 shows a schematic representation of a projection device 100 installed in a housing 1100 of a head-up display in accordance with FIG

Embodiment in the closed state. The projection device 100 and the housing 1100 essentially correspond to one

Projection device or a housing, as described above with reference to Figures 11 and 12.

The projection device 100 is shown in Fig. 14 in the half-opened state and in Fig. 15 in the open state, in which the Combinerscheibe 106 is fully extended.

The extension of the Combinerscheibe 106 takes place according to the embodiment shown in Figures 13 to 15 by a coupled movement of the cover 110 and the Combinerscheibe 106 with simultaneous storage of the cover 110 on the Combinerhalter. 16 shows a schematic illustration of a section through a housing 1100 of a head-up display with built-in projection device 100 according to an exemplary embodiment in the open state, for example a projection device described above with reference to FIGS. 11 to 15. As can be seen in FIG. 16, the guide device 102 is according to this

Embodiment attached to the combiner holder 104, so that the

Guide device 102 is rotated accordingly when turning the combiner 104. Depending on the embodiment, the combiner holder 104 and the guiding experience 102 may be made in one piece. The cover element 110 is thus mounted directly on the combiner holder 104. One direction of rotation is marked with a curved arrow. A dashed arrow marks one

Displacement direction of the cover 110 along the Combinerscheibe 106. Depending on the embodiment, the cover 110 moves along a line or curved path. By the combined movement of the cover member 110 and the combiner holder 104 and the combiner disc attached thereto

106 bottlenecks can be bypassed in an available space.

17 shows a schematic representation of a guide device 102 mounted on a combiner holder 104 according to an exemplary embodiment, such as a guide device, as described in connection with a projection device shown in FIGS. 11 to 16. Here, the two guide rails 108, 800 for rail-like storage of

Cover element 110 realized approximately as elements of the combiner holder 104. For storage, the cover 110 each has an elongated groove on both sides

1700, in each of which a formed with a corresponding mating contour, elongated elevation of the two guide rails 108, 800 engages.

Fig. 18 shows the combiner holder 104 with the one mounted thereon

Guide device 102 of FIG. 17 obliquely from below. It can be seen here that the cover element 110 is designed on a bottom side facing the combiner disc 106 with two toothed rack segments 1800 extending along each side edge of the cover element 110, into each of which

Rack drive element 1802 engages. The two

Rack and pinion elements 1802, which may be realized as gears can, are about a rotatably mounted in the combiner holder 104

Drive shaft 1804 rotatably connected to each other, the two

Rack and pinion drive elements 1802 are further coupled to the first output element of the drive mechanism not shown here. To recognize is further a plurality of arranged on the underside of the cover 110

Ribs 1806, which serve to stiffen the cover 110. Of the

Rack and pinion mechanism of the two rack segments 1800 and the two rack drive elements 1802 serves to couple the rotational movement of the combiner holder 104 with the desired translational movement of the cover element 110.

FIG. 19 shows a schematic illustration of a projection device 100 installed in a housing 1100 of a head-up display in accordance with FIG

Embodiment in the open state, such as a projection device, as described for example with reference to Figures 12, 15 and 16.

Shown is the drive mechanism 112 with various

Movement elements for moving the cover member 110 in combination with the combiner holder 104. According to this embodiment, the drive mechanism 112 is driven by only one drive motor. Here, the two guide rails 108, 800 and the combiner holder 104 are formed as a rigid unit, wherein one of the guide rails, in Fig. 19 by way of example, the further guide rail 800 is coupled via a rocker arm 1900 with the drive mechanism 112. By means of the rocker arm 1900, it is possible to simultaneously rotate the combiner holder 104 and the two guide rails 108, 800. A direction of rotation for rotating the Combinerscheibe 106 in the projection position is marked with an arrow.

FIG. 20 shows a schematic representation of a projection device 100 installed in a housing 1100 of a head-up display according to a

Embodiment in the open state. The projection apparatus 100 essentially corresponds to that described with reference to FIG. 19

Projection device, with the difference that the projection device 100 according to this embodiment, separate drive units for the

Combiner holder 104 and the cover 110 has. The movement of the cover 110 takes place here by a separate drive motor 2000 with associated movement elements, such as the rack drive elements 1802.

FIG. 21 shows a schematic representation of a projection device 100 installed in a housing 1100 of a head-up display according to a

Embodiment in the half-open state. The movement of the

Cover member 110 is carried out according to this embodiment

Spring or spring damping elements. Depending on the position of the

Combiner holder 104 results in different directions of force and

amounts that cause opening or closing of the cover 110.

22 shows a schematic representation of a projection device 100 installed in a housing 1100 of a head-up display according to an exemplary embodiment in the closed state. Shown is a variant of the projection device 100, in which the cover member 110 partially of the

Housing 1100 is received and guided. For example, that will

Covering 110 in the closed state of the projection device 100 on the rigid housing 1100 out. FIG. 23 shows a schematic representation of a projection device 100

Fig. 22. To activate the projection device 100, the cover member 110 is first on a suitable mechanism on one on the

Combiner holder 104 located guide unit pushed in the direction of the dashed arrow. Only then does the actual opening movement of the combiner holder 104 begin in the direction of the curved arrow.

By such a combined movement of combiner holder 104 and

Covering 110 and the additional storage of the cover 110 on the combiner holder 104 particularly critical bottlenecks can be considered during the movement sequence.

The rail-like mounting of the cover 110 is designed, for example, such that the cover 110 is a purely translational or

curve-like movement performs. The translational degree of freedom along the storage is optionally by further mechanisms with the rotary motion coupled to the Combinerscheibe 106 and the combiner holder 104 or driven by a separate mechanism.

As described above, the coupling of the movements, for example via a rack and pinion connection between cover and

Drive mechanism realized. Here, one and the same drive element, such as an electric motor, can be used for both movements. The rotary motion of the combiner holder is transformed into additional translational elements by means of additional gear elements and a toothed rack element

Transfer cover.

It is also conceivable that the combiner holder and the cover are moved by separate drive elements. Here, additional elements for coupling both movements such as gears, springs or

Joint elements omitted. Such a control has the advantage that the

Combiner holder and the cover can be moved via different movement patterns that allow a better adaptation of the movements to a given space. As already mentioned, it is also possible, the cover by

to move counteracting spring forces, which vary in their amount depending on the position of the Combinerhalters and thus move the cover in one direction or the other. The inclusion and guidance of the cover can according to a

Embodiment be designed so that this during the

Opening operation is only on the combiner holder, but in the fully open or closed positions of the Combinerscheibe on rigid elements of the combiner head-up display, such as the housing shells, is located.

In particular, in critical space situations, the cover can also be constructed in several parts of several cover segments, along a corresponding guide holder, such as in the form of the above-described guide rails, are displaced. FIG. 24 shows a schematic illustration of a combiner head-up display 2400. The combiner head-up display 2400 has a projection device 100 described with reference to FIGS. 1 to n23. The projection device 100 is in the projection position.

25 shows a flow diagram of a method 2500 for operating a projection apparatus according to an embodiment, such as a projection apparatus described above with reference to FIGS. 1 to 24. The method 2500 can be executed or controlled, for example, by a control unit described above with reference to FIG. 1. The method 2500 includes a step 2510 in which a control signal is provided to control the drive means such that the combiner holder is moved synchronously with the cover member between the closed position and the projection position. Here, the Combinerscheibe and the cover can move approximately parallel to each other.

According to one embodiment, the movement takes place via a

common drive via pinion, each a toothed segment of a

Compiler module and coupled to the cover

Driving guide lever, wherein the guide lever can simultaneously serve to support one end of the cover.

If an exemplary embodiment comprises a "and / or" link between a first feature and a second feature, then this is to be read so that the embodiment according to one embodiment, both the first feature and the second feature and according to another embodiment either only first feature or only the second feature.

Claims

claims

A projection apparatus (100) for a head-up display (2400) comprising a housing (1100) having a housing opening (1106) for passing a light beam representing a virtual image, the projection apparatus (100) comprising: a A combiner holder (104) for holding a combiner disc (106), said combiner holder (104) being rotatable between a combiner disc (104)

Projection position in which the Combinerscheibe (106) projects the light beam in a field of view of a driver, and a

Closed position in which the Combinerscheibe (106) is recessed in the housing (1100), in the housing (1100) arranged or can be arranged; a guide device (102) having at least one guide rail (108) for guiding a cover element (110) for covering the housing opening (1106), wherein the cover element (110) is rotatably and / or displaceably arranged or arrangeable in the guide rail (108), wherein the guide rail (108) is shaped to be a main extension plane of the cover member (110) in the

Substantially parallel to a main extension plane of the

To lead combiner disc (106); and a drive mechanism (112) for synchronizing a

Movement of the cover (110) with a movement of the

Combiner holder (104), wherein the drive mechanism (112) at least one coupled to the cover member (110) first

Output element (118), a second output element (120) coupled to the combiner holder (104), and a second input element (118) engaging in the first output element (120) and the second output element (120)

Drive element (116). Projection device (100) according to claim 1, characterized by at least one guide lever (122) for coupling the

Cover element (110) with the first output element (118), in particular wherein the guide lever (122) rotatably on the

Guide means (102) is attached and / or the cover (110) rotatably connected to a first end of the guide lever (122) and / or the first output member (118) rotationally fixed to a second end of the guide lever (122) is arranged and / or the first output element (118) and the guide lever (122) are made in one piece.

Projection device (100) according to one of the preceding claims, characterized by at least one further

Guide lever (130), wherein the drive mechanism (112) at least a third output member (128) which is non-rotatably connected via a shaft (114) with the first output member (118), wherein the cover member (110) via the further guide lever (130 ) is coupled to the third output element (128), in particular wherein the further guide lever (130) is rotatably attached to the guide means (102) and / or the shaft (114) is rotatably mounted in the guide means (102) and / or the cover member (110) is rotatably connected to a first end of the further guide lever (130) and / or the third output element (128) rotationally fixed to a second end of the further guide lever (130) is arranged and / or the third output element (128) and the other Guide lever (130) are made in one piece.

Projection device (100) according to claim 2 and 3, characterized in that the combiner holder (104) between the

Guide lever (122) and the further guide lever (130) is arranged or can be arranged.

Projection device (100) according to one of the preceding claims, characterized in that the combiner holder (104) is rotatably mounted in the guide device (102), wherein the

Guide means (102) in the housing (1100) is attached.

Projection device (100) according to one of the preceding claims, characterized in that the guide device (102) is mounted on the combiner holder (104).

Projection device (100) according to one of the preceding claims, characterized in that the guide rail (108) at least in sections has a curved course.

Projection device (100) according to one of the preceding claims, characterized in that the guide device (102) has at least one further guide rail (800), wherein the cover (110) further rotatably and / or slidably disposed in the further guide rail (800) or can be arranged, in particular wherein a first edge region of the cover (110) in the guide rail (108) and a first edge region opposite the second edge region of the cover (110) in the further guide rail (800) is arranged or can be arranged.

Projection device (100) according to one of the preceding claims, characterized in that the cover element (110) at least one rack segment (1800) and the

Drive mechanism (112) at least one rack drive element (1802), wherein the rack segment (1800) via the at least one rack drive element (1802) with the first output member (118) is coupled.

Projection device (100) according to one of the preceding claims, characterized in that the cover (110) is designed as a rigid plate.

11. Projection device (100) according to one of the preceding claims, characterized by a drive device (124) for driving the drive element (116).

12. A method (2500) for operating a projection apparatus (100) according to one of the preceding claims, wherein the method (2500) comprises the following steps:

Providing (2510) a control signal (134) for controlling drive means (124) for driving the drive member (116) to move the combiner holder (104) in synchronism with the cover member (110) between the closed position and the projection position.

13. A controller (132) configured to perform and / or drive the method (2500) of claim 12.

14. A computer program configured to execute and / or control the method (2500) according to claim 12.

15. A machine-readable storage medium on which the computer program according to claim 14 is stored.