DE102019108330A1 - Foldable field of view indicator - Google Patents

Abstract

The invention relates to a foldable field of view display device, in particular for a motor vehicle, comprising a foldable housing, compact in its closed state, with a projection unit arranged therein for generating a projection light beam with a display content, which is surrounded by the housing in the closed state, in particular on all sides, - wherein the housing has a mirror wall with a deflecting mirror that can be extended to a predetermined mirror distance from the projection unit in the beam path of the projection light beam, as well as a projection screen that can be opened from a housing bottom side to a predetermined angle of incidence, - the projection unit, the deflection mirror and the projection screen are designed in this way and their mutual arrangement in a correspondingly open housing condition are such that the projection light beam generated by the projection unit is reflected via the deflection mirror Ion surface of the projection screen is projected from which it is reflected to the eyes of a user to generate a virtual display image superimposed in his field of vision behind the projection screen.

Description

Technical area

The invention relates to visual field display devices for generating a virtual display image superimposed into the field of vision of a user, in particular for motor vehicles.

Technical background

Field of view display devices in a vehicle are known, for example, by the names head-up displays (HUD), augmented reality displays or entertainment displays. In this way, for a driver, for example, supporting display content, such as information about a current speed limit, is superimposed as a virtual display image on the real image of the surroundings in front of the vehicle, or entertainment content is displayed in the field of vision of a vehicle occupant at a distance that is comfortable for his eyes.

For this purpose, a field of view display device usually comprises a projection unit that generates a projection light beam with the desired display content and projects it onto the vehicle windscreen or another type of at least partially reflective projection screen from which it is reflected towards the respective user of the field of view display device. This is done in such a way that the user has the impression that the display image on the other side of the projection screen is at some distance in front of it (virtual display image), this distance depending on the overall optical arrangement in the field of view display device and typically for a comfortable one Viewing is designed by the user, for example so that the driver can see the virtual display image without refocusing his eyes while driving or a vehicle occupant can view entertainment content as an enlarged virtual display image and / or at a greater distance than that of the projection screen.

In the vehicle, the installation space required to attach the projection unit and / or the projection screen is scarce. In particular, in the head area of vehicle occupants, exposed parts can objectively and subjectively harbor a risk of injury.

It is the object of the present invention to provide a system, in particular with regard to the required installation space and / or the ability to attach or retrofit in a higher-level system, such as. B. a motor vehicle to indicate improved field of view display device of the type mentioned.

Disclosure of the invention

This object is achieved by a field of view display device according to claim 1 and by a control unit and a corresponding motor vehicle according to the independent claims. Further refinements are given in the dependent claims. All of the additional features and effects mentioned in the claims and the description for the field of view display device also apply in relation to the control unit or the motor vehicle, and vice versa.

According to a first aspect, a foldable field of view display device is provided, in particular for attachment to a headliner of a motor vehicle. The field of view display device comprises a foldable, spatially compact housing in its closed state with a projection unit arranged therein for generating a projection light beam with a display content, which is surrounded by the housing in the closed state, in particular from all sides. This can serve, for example, to protect the projection unit from damage and environmental influences.

Furthermore, the housing has a mirror wall, which can be extended to a predetermined mirror distance from the projection unit in the beam path of the projection light beam, with a deflecting mirror facing the projection unit. Furthermore, the housing has a housing bottom side as well as a projection screen which can be opened by this to a predetermined angle of attack. The projection unit, the deflection mirror and the projection screen are designed in such a way and their mutual arrangement in an open housing state defined by the predetermined mirror spacing and the predetermined angle of attack is designed such that the projection light beam generated by the projection unit during operation of the field of view display device via the deflection mirror onto a reflection surface the projection screen, from which it is reflected to the eyes of a user in order to generate a virtual display image superimposed in his field of view behind the projection screen. The projection unit can be designed in any manner known per se suitable for this purpose and, for example, comprise a light source, one or more displays for generating the display content and suitable imaging and projection optics in the beam path of the projection light beam transporting it.

In the open housing state defined in this way, the reflective surface of the projection screen is available to the user when the field of view display device is used as intended facing, and the projection screen can, for example, be at some distance in front of his eyes in his field of vision. The virtual display image can be displayed in a display image distance (in particular behind the projection screen) due to the optical design and mutual arrangement of the projection unit, the deflection mirror and the projection screen, which is optimized, for example, with regard to easier or no refocusing of the user's eyes and / or a suitable display size can be generated.

One idea of the field of view display device presented here is the foldable housing mechanism, which enables optical components such as a deflection mirror and a projection screen to be folded onto the housing or pushed into the housing outside of the operation of the field of view display device. As a result, for the field of view display device, in particular, a compact installation space without exposed components prone to injury, as well as easier retrofitting in a higher-level system, such as a motor vehicle, and / or a particularly aesthetic appearance can be realized. In particular, such a field of view display device can therefore, for example, be attached to a roof lining in a motor vehicle without impairing the passenger compartment (in any position, for example in the front or rear seat area).

• - eine zumindest teilweise durch die Spiegelwand gebildete flache, insbesondere ebene, Frontseite, quer zu welcher eine Längsachse des Gehäuses verläuft, entlang der sich die Bodenseite des Gehäuses, die flach oder aber gewölbt ausgebildet sein kann, von der Frontseite ausgehend erstreckt, sowie
• - eine sich ebenfalls von der Frontseite aus entlang der Längsachse erstreckende flache oder gewölbte Dachseite, wobei die Dach- und Bodenseite vorderseitig über die Frontseite und im Übrigen entlang deren gesamter Seitenränder direkt miteinander verbunden sind.

According to one embodiment, the housing comprises in the closed state

• - a flat, in particular flat, front side formed at least partially by the mirror wall, transversely to which a longitudinal axis of the housing runs along which the bottom side of the housing, which can be flat or curved, extends from the front side, and
• - A flat or curved roof side also extending from the front side along the longitudinal axis, the roof and bottom sides being connected to one another directly on the front side via the front side and, moreover, along their entire side edges.

In this embodiment, an overall flattened, for example aerodynamic, shape can be achieved for the housing in its closed state by making its overall dimension (s) larger, in particular many times larger, in the longitudinal axis direction and possibly in a further spatial direction along its roof or floor side , as its overall dimension in a third spatial direction perpendicular thereto, which is / are the vertical spatial direction when the field of view display device is used as intended. This can result in a particularly space-saving, low-injury and / or aesthetic design in the above sense and in particular favor the attachment of the field of view display device to the roof lining of a motor vehicle.

In a specific embodiment, the bottom side of the housing and the projection screen are curved with essentially the same curvature, so that when the housing is closed, the entire surface of the projection screen rests against its bottom side or forms part of it. This, too, can result in a particularly space-saving, low-injury and / or aesthetic design in the above sense and, in particular, favor the attachment of the field of view display device to the roof lining of a motor vehicle. (Here, "essentially" means in particular a manufacturing or construction-related possible deviation of up to about 10% from the relevant dimensions or spatial directions.)

In a specific embodiment, the projection screen can be viewed by the human eye in the viewing direction of the user, i. H. be at least partially transparent, in particular transparent or only partially transparent or diffuse or tinted for visible light that reaches the eye of the user of the field of view display device through the projection screen. A transparent projection screen does not obstruct the user's view of the environment behind it, so that the virtual display image of the field of view display device is superimposed on it. In comparison, with a not completely transparent, but z. B. tinted or diffuse projection screen improves the visibility of the virtual display image compared to the environment behind the projection screen and thus facilitates its perceptibility for the user. As a borderline case of this effect, the projection screen can alternatively also be opaque to the visible light incident from the other side in order to maximize the perceptibility of the virtual display image for the user in this sense.

In particular, the predetermined angle of attack that the projection screen forms in the open housing state to the bottom side of the housing in its closed state can be between about 70 ° and about 110 °, preferably between about 80 ° and about 100 °, in particular about 90 °. The predetermined angle of attack can for example be adjustable, in particular electronically controllable, in order, for example, to adapt the beam path of the projection light beam to different sizes, positions or distances of the users. The adjustment can be fully or partially manual by means of suitable mechanical adjustment devices, such as. B. rotary levers or knobs with or without locking positions, or automated and be realized for example with the help of suitable sensors of a known type.

In the embodiment mentioned above, the mirror wall can be extendable in particular in the longitudinal direction of the housing or in a direction along a flat or planar section of the roof side of the housing up to the predetermined mirror distance from the projection unit. This can be implemented in particular by means of at least one extendable straight strut extending in the roof side, in particular in the roof side section mentioned, or forming part of it. The predetermined mirror spacing can for example be adjustable, in particular electronically controllable, in order, for example, to adapt the beam path of the projection light beam to different sizes, positions or distances of the users. The adjustment can be fully or partially manual by means of suitable mechanical adjustment devices, such as. B. rotary levers or knobs with or without locking positions, or automated and implemented, for example, using suitable sensors of a known type.

To enable the field of view display device to be retrofitted in a higher-level system, in particular a motor vehicle, it can furthermore have fastening means arranged on the housing, in particular integrated therein, for fastening the field of view display device in the higher-level system. For example, the fastening means can comprise a suitably designed Velcro fastener and / or needle set for subsequently fastening the field of view display device to a headliner of a motor vehicle.

According to a further aspect, a control unit for a field of view display device of the type set out herein is provided, the control unit for electrically controlling the field of view display device for extending the mirror wall and / or for opening the projection screen and / or for electronically controlled adjustment of the predetermined mirror distance and / or the predetermined Angle of attack is formed.

• - einen Insassenraum, der nach oben zumindest teilweise von einem dem Insassenraum zugewandten Dachhimmel begrenzt ist;
• - die Blickfeldanzeigevorrichtung der hierin dargelegten Art, die mit ihrer Dachseite dem Dachhimmel zugewandt und an diesem befestigt ist; und insbesondere ferner
• - eine Steuerungseinheit der hierin dargelegten Art.

According to a further aspect, a motor vehicle is provided, comprising:

• a passenger compartment which is at least partially delimited at the top by a roof lining facing the passenger compartment;
• the field of view display device of the type set forth herein, the roof side of which faces the headliner and is attached to it; and especially further
• - a control unit of the type set out herein.

Figure list

• 1a eine schematische Seitenansicht einer Blickfeldanzeigevorrichtung der hierin dargelegten Art mit deren Gehäuse in dessen geöffnetem Zustand in einer bestimmungsgemäßen Position vor einem Benutzer;
• 1b eine weitere Ansicht der Blickfeldanzeigevorrichtung der 1a schräg von vorn (in Bezug auf den Benutzer) und von der Seite;
• 1c eine weitere Ansicht der Blickfeldanzeigevorrichtung der 1a schräg von hinten (in Bezug auf den Benutzer) und von der Seite;
• 1d eine perspektivische Ansicht der Blickfeldanzeigevorrichtung der 1a schräg von oben mit geschlossener Spiegelwand, jedoch mit aufgeklappter Projektionsscheibe;
• 2a eine schematische perspektivische Ansicht einer weiteren Blickfeldanzeigevorrichtung der hierin dargelegten Art schräg von unten mit deren Gehäuse in dessen geschlossenem Zustand;
• 2b eine weitere perspektivische Ansicht der Blickfeldanzeigevorrichtung der 2a schräg von unten mit deren Gehäuse in dessen geöffnetem Zustand und ohne Projektionseinheit;
• 3 eine schematische Seitenansicht einer weiteren Blickfeldanzeigevorrichtung der hierin dargelegten Art mit deren Gehäuse in dessen geschlossenem Zustand; und
• 4 ein Kraftfahrzeug mit einer in dessen Insassenraum angeordneten Blickfeldanzeigevorrichtung der hierin dargelegten Art.

The above aspects of the invention and its embodiments and specific configurations are explained in more detail below with reference to the examples shown in the accompanying drawings. The drawings are purely schematic; in particular, they should not be read as being true to scale. Show it:

• 1a a schematic side view of a field of view display device of the type set forth herein with its housing in its open state in an intended position in front of a user;
• 1b another view of the field of view display device of FIG 1a obliquely from the front (in relation to the user) and from the side;
• 1c another view of the field of view display device of FIG 1a obliquely from behind (in relation to the user) and from the side;
• 1d FIG. 3 is a perspective view of the field of view display device of FIG 1a diagonally from above with closed mirror wall, but with opened projection screen;
• 2a a schematic perspective view of a further field of view display device of the type set forth herein obliquely from below with its housing in its closed state;
• 2 B FIG. 8 is another perspective view of the field of view display device of FIG 2a obliquely from below with the housing in its open state and without a projection unit;
• 3 a schematic side view of a further field of view display device of the type set forth herein with its housing in its closed state; and
• 4th a motor vehicle with a field of view display device of the type set forth herein arranged in the passenger compartment thereof.

Description of embodiments

All of the various embodiments, variants and specific design features of the field of view display device, the control unit and the motor vehicle according to the above aspects of the invention mentioned above in the description and in the subsequent claims can be used in the 1a to 4th examples shown. you will be therefore not all of them repeated below. The same applies accordingly to the definitions of terms and effects already given above in relation to individual features that are included in the 1a-4 are shown.

1a Figure 11 shows, in a schematic side view, an example of a foldable field of view display device 1 according to the above first aspect of the invention, wherein the foldable housing 2 in the operation of the field of view display device 1 appropriately open and in a position suitable for operation in front of a user 3 is shown. The field of view display device 1 can in particular be designed for attachment to a headliner of a motor vehicle (cf. 4th ).

In its closed state (cf. 2a) spatially compact housing 2 comprises a projection unit arranged therein 4th for generating a projection light beam L. with a display content. The projection unit 4th is in this example as in 1 b and 1d more recognizable from the case 2 in its closed state surrounded on all sides.

The case 2 has a to a predetermined mirror distance d from the projection unit 4th in the beam path of the projection light beam L. extendable mirror wall 5 with one of the projection unit 4th facing deflection mirror 6th on. Furthermore, the housing 2 a bottom side 7th and one of these at a predetermined angle of attack α folding projection screen 8th on. Here are the projection unit 4th , the deflection mirror 6th and the projection screen 8th designed in such a way and their mutual arrangement in the predetermined mirror spacing d and the predetermined angle of attack α defined open housing state according to 1a is designed in such a way that the projection unit 4th during operation of the field of view display device 1 generated projection light beam L. via the deflection mirror 6th on a reflective surface 9 the projection screen 8th is projected from it to the user's eyes 3 to generate one in his field of vision behind the projection screen 8th faded in virtual display image (cf. 4th ) is reflected. Purely by way of example, in 1a indicated mutual arrangement of the field of view display device 1 and the user 3 the appropriate predetermined angle of attack α the projection screen 8th to the bottom when the housing is open 7th of the housing 2 forms, about 90 °.

1b Figure 13 shows another view of the head-up display device 1 of the 1a obliquely from the front (in relation to the user 3 ) and from the side where the inside of the case 2 mounted projection unit 4th can be seen in the shown open housing state. The projection unit 4th can be designed in any suitable manner and, for example, one or more displays for generating the display content and suitable imaging and projection optics in the beam path of the projection light beam transporting this L. (see. 1a) include. 1c Figure 13 shows another view of the head-up display device 1 of the 1a obliquely from behind (in relation to the user 3 ) and from the side in which the deflector mirror 6th is better to see.

1d Figure 13 shows a perspective view of the field of view display device 1 of the 1a obliquely from above in a partially closed state of the housing 2 where the mirror wall 5 is completely closed, the projection screen 8th but still as in 1a is opened.

• - eine zumindest teilweise durch die Spiegelwand 5 gebildete flache, in diesem Beispiel ebene, Frontseite 10, quer zu welcher eine Längsachse A des Gehäuses 2 verläuft, entlang der sich die Bodenseite 7 des Gehäuses 2, die in diesem Beispiel gewölbt ausgebildet ist, von der Frontseite 10 ausgehend erstreckt, sowie
• - eine sich ebenfalls von der Frontseite 10 aus entlang der Längsachse A erstreckende teils flache und teils gewölbte Dachseite 11, wobei die Dach- und Bodenseite vorderseitig über die Frontseite 10 und im Übrigen entlang deren gesamter Seitenränder 12 direkt miteinander verbunden sind.

How to get in 1d already recognizes (see also 2a with another example), comprises the housing 2 when closed

• - one at least partially through the mirror wall 5 formed flat, in this example flat, front side 10 , transverse to which a longitudinal axis A. of the housing 2 runs along which the bottom side extends 7th of the housing 2 , which is curved in this example, from the front 10 starting extends, as well
• - one also from the front 10 out along the longitudinal axis A. Extending partly flat and partly vaulted roof side 11 , with the roof and floor side on the front side over the front side 10 and, moreover, along their entire margins 12 are directly connected to each other.

In this embodiment, the housing 2 In its closed state, it has an overall flattened, in this example aerodynamically shaped, shape, with its overall dimensions in the direction of the longitudinal axis and in a horizontal spatial direction perpendicular thereto along its roof side 11 z. B. by a factor of 1.5 to 5 larger than its overall dimension in the vertical spatial direction perpendicular thereto. As mentioned at the beginning, such a space-saving, low-injury and / or aesthetic design can in particular be used to attach the field of view display device 1 favor on the headliner of a motor vehicle.

In the in 1a-1d example shown are the bottom side 7th of the housing 2 and the projection screen 8th curved with a substantially equal curvature, so that the projection screen 8th when the housing is closed 2 with their entire surface on the bottom side 7th can be applied or (as in 2a-2b) forms part of this.

In the in 1a-1d The example shown is the mirror wall 5 in one direction along a section which is flat to flat in places 11a the roof side 11 of the housing 2 up to the predetermined mirror spacing d from the projection unit 4th extendable. In this case it is by means of one in this roof side section 11a extending extendable straight strut 13 realized the in 1d recognizable closed housing state a part of the roof side section 11a forms.

2a and 2 B show schematic perspective views of a further field of view display device 1 of the type set out here obliquely from below, with the housing 2 in its closed state ( 2a) and in its open state ( 2 B) . To simplify the representation, in 2 B the projection unit 4th inside the case 2 omitted.

Except for the difference that the curved, aerodynamically designed projection screen 8th in in 2a shown closed housing state a part of its bottom side 7th forms (while the projection screen 8th in 1a-1d for flat contact with a closed bottom side 7th is formed) and the front 10 in 2a-2b two flat sections at a slight angle to each other 10a and 10b has, corresponds to the structure and the functional principle of the field of view display device 1 according to 2a-2b the one who 1a-1d and is therefore not described repeatedly. Identical or functionally similar elements are denoted by the same reference symbols.

The same applies accordingly to the in 3 Another example of a possible configuration of a field of view display device, shown in a schematic side view 1 of the type set forth herein, with its housing in its open state.

In 3 is the projection screen 8th similar to the 1a-1d for flat contact with a closed bottom side 7th of the housing 2 formed, and the predetermined angle of attack α the projection screen 8th to the bottom side 7th of the housing 2 forms is less than 90 ° and can be around 70 ° -80 ° depending on the application. Unlike in 1a-1d also has the roof side 11 of the housing 2 in 3 not a roof side section that is flat in places, but is arched with a constant curvature. Here is the mirror wall 5 in a direction along the longitudinal axis A. of the housing 2 by means of one in or directly below the roof side 11 extending extendable straight strut 13 up to the predetermined mirror spacing d from the projection unit 4th extendable.

4th shows a motor vehicle 14th with one in the passenger compartment 15th arranged field of view display device 1 of the type set out herein, their structure and principle of operation as already in relation to 1a to 3 described for generating an in a field of view of a user 3 behind the projection screen 8th superimposed virtual display image V and is therefore not repeated again.

As in 4th The passenger compartment is indicated schematically purely by way of example 15th of the motor vehicle 14th upwards at least partially from one of the passenger compartment 15th facing headliner 16 limited. The field of view display device 1 is with their roof side 11 the headliner 16 facing and on this by suitable fasteners 17th such as B. Velcro fastener, needle set or clip or screw fastener, especially subsequently and permanently or removably attached.

Furthermore, in the motor vehicle 14th a control unit 18th of the type set out herein may be provided for the electrical control of the field of view display device 1 to extend the mirror wall 5 and / or to open the projection screen 8th and / or for the electronically controlled adjustment of the predetermined mirror spacing d and / or the predetermined angle of attack α is trained.

List of reference symbols

1

foldable field of view display device

2

casing

3

user

4th

Projection unit

5

extendable mirror wall

6

Deflection mirror

7th

Bottom side

8th

Projection screen

9

Reflective surface

10

Front

11

Roof side

12th

respective side edge of the bottom and the roof side

13

strut

14th

Motor vehicle

15th

Passenger compartment

16

Headliner

17th

Fasteners

18th

Control unit

V

virtual display image

α

predetermined angle of attack

A.

Longitudinal axis

L.

Projection light beam

d

predetermined mirror spacing

Claims (10)

Foldable field of view display device (1), in particular for attachment to a headliner (16) of a motor vehicle (14), comprising: - A foldable, spatially compact housing (2) in its closed state with a projection unit (4) arranged therein for generating a projection light beam (L) with a display content, which is surrounded by the housing (2) in particular on all sides in the closed state, - the housing (2) having a mirror wall (5) which can be extended to a predetermined mirror distance (d) from the projection unit (4) in the beam path of the projection light beam (L) with a deflecting mirror (6) facing the projection unit (4) and one from a housing bottom side (7) has a projection screen (8) which can be opened to a predetermined setting angle (α), - wherein the projection unit (4), the deflection mirror (6) and the projection screen (8) are designed and their mutual arrangement in an open housing state defined by the predetermined mirror spacing (d) and the predetermined angle of attack (α) are such that the The projection light beam (L) generated by the projection unit (4) during operation of the field of view display device (1) is projected via the deflecting mirror (6) onto a reflection surface (9) of the projection screen (8), from which it is directed to the eyes of a user (3) Generating a virtual display image (V) that is superimposed in its field of view behind the projection screen (8) is reflected. Field of view display device (1) according to Claim 1 , in which the housing (2) in the closed state - has a flat, in particular flat, front side (10) formed at least partially by the mirror wall (5), transversely to which a longitudinal axis (A) of the housing (2) runs along the the flat or curved bottom side (7) of the housing (2) extends from the front side (10), and - a flat or curved roof side (11) likewise extending from the front side (10) along the longitudinal axis (A) the top and bottom sides (11, 7) are connected to one another on the front side via the front side (10) and, moreover, along the entire side edges (12) thereof. Field of view display device (1) according to Claim 2 , in which the housing (2) in the closed state has an overall flattened, in particular aerodynamic, shape, with its overall dimension (s) in the longitudinal axis direction and possibly in a further spatial direction along its roof or floor side clearly, in particular many times, more than its overall dimension in a third spatial direction perpendicular thereto, which is the vertical spatial direction when the field of view display device (1) is used as intended. Field of view display device (1) according to one of the preceding claims, in which the bottom side (7) of the housing (2) and the projection screen (8) are curved with a substantially equal curvature, so that the projection screen (8) in the closed state of the housing (2 ) rests with its entire surface on its bottom side (7) or forms part of it. Field of view display device (1) according to one of the preceding claims, in which the projection screen (8) is at least partially transparent to the human eye in the direction of view of the user (3), in particular transparent or only partially transparent or diffuse, or else opaque. Field of view display device (1) according to one of the preceding claims, in which the predetermined angle of incidence (α) which the projection screen (8) forms in the open state of the housing to the bottom side (7) of the housing (2) in its closed state is between approximately 70 ° and approximately 110 °, preferably between about 80 ° and about 100 °, in particular about 90 °, the predetermined angle of attack preferably being adjustable, in particular electronically controllable. Field of view display device (1) according to one of the Claims 2 to 6th , in which the mirror wall (5) in the longitudinal direction of the housing (2) or in a direction along a flat or planar roof side section (11a) of the housing (2) can be extended up to the predetermined mirror distance (d) from the projection unit (4) , in particular by means of at least one extendable straight strut (13) running in this roof side section (11 a) or forming part of it, the predetermined mirror spacing preferably being adjustable, in particular electronically controllable. Field of view display device (1) according to one of the preceding claims, further comprising fastening means (17) arranged on the housing (2), in particular integrated therein, for fastening the field of view display device (1) in a higher-level system, in particular a motor vehicle (14). Control unit (18) for a field of view display device (1) according to one of the preceding claims, wherein the control unit (18) for electrically controlling the field of view display device (1) for extending the mirror wall (5) and / or for opening the projection screen (8) and / or for the electronically controlled adjustment of the predetermined mirror distance (d) and / or the predetermined angle of attack (α). Motor vehicle (14), comprising: - a passenger compartment (15) which is at least partially delimited at the top by a roof lining (16) facing the passenger compartment (15); - The field of view display device (1) according to one of the Claims 2 to 8th which faces the roof lining (16) with its roof side (11) and is attached to it; and preferably further - a control unit (18) according to Claim 9 .

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