CN104166238B - Device and method for projecting image information into the field of view of an occupant of a vehicle - Google Patents
Device and method for projecting image information into the field of view of an occupant of a vehicle Download PDFInfo
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- CN104166238B CN104166238B CN201410202035.3A CN201410202035A CN104166238B CN 104166238 B CN104166238 B CN 104166238B CN 201410202035 A CN201410202035 A CN 201410202035A CN 104166238 B CN104166238 B CN 104166238B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0149—Head-up displays characterised by mechanical features
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0123—Head-up displays characterised by optical features comprising devices increasing the field of view
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Abstract
The invention relates to a device for projecting image information into the field of view of an occupant (106) of a vehicle (100), comprising an optical system (108) having at least one optical element (112) for projecting the image information onto a surface (104) to be combined, and a mechanism (114) for moving the optical system (108) in order to adapt the projection of the image information to the eye position (122) of the occupant (106) in such a way that the vertical image position or the depression angle remains substantially constant.
Description
Technical Field
The present invention relates to a device for projecting image information into the field of view of an occupant of a vehicle and to a corresponding method.
Background
A visual field display is a display that is capable of putting information into the field of view of an occupant of a vehicle. For example, information from the vehicle assistance system can be put into the field of view of the driver. A field-of-view display is also known under the name head-up display or HUD for short. The field of view display illuminates the transparent surface or window surface with an image of the information, thereby reflecting the light specular of the image of the information into the eyes of an observer looking through the transparent surface. In contrast to conventional display methods using dashboards, a field-of-view display has the advantage that the observer can obtain the information conveyed by the field-of-view display without having to remove the eye from the actual traffic situation.
In the prior art, in order to adapt a vertical image to a vertical eye position of a driver, a main mirror surface of a visual field display (HUD) is turned over in the HUD of a non-contact analog type. This is a simple solution, but where the setting of the eye position is linked to a change of right angle to the road surface (depression LDA).
DE 102007047232 a1 describes a visual field display for a motor vehicle, which has a projection unit with an image generator for generating virtual images and a combiner for viewing the virtual images.
Disclosure of Invention
Against this background, an apparatus for projecting image information into the field of view of an occupant of a vehicle and a corresponding method for projecting image information into the field of view of an occupant of a vehicle are proposed with the invention, which method uses the apparatus. The device has the following features: an optical system having at least one optical element for projecting the image information to a combining plane; and a mechanism for moving the optical system so as to adapt the projection of the image information to the eye position of the occupant. Advantageous embodiments are given in the following description.
The eye height of the occupant, in particular of the driver, may be influenced by his head and simultaneously or alternatively by his seat position. The visual field display can provide image information such that the driver can obtain the image information regardless of the eye height and/or eye position, or the projection of the image information can be adapted to the eye position. If the projection of the image information is adapted to the eye position, a saving of construction space is achieved in comparison with a correspondingly large range (eye movement range) in which the driver's eyes can be located and the correspondingly large-sized optical system of the visual field display, which is determined therefrom. The described design can advantageously be used to create a large field of view while the installation space is compact.
The design can be used for different feature field displays. This approach is also suitable for large-field-of-view displays (FOV, English), for example. Additional information within the real driving scene can be added in the driver's main field of view via the windshield by means of so-called augmented reality technology (in english: augmented reality, or AR for short). Typical examples of applications with augmented reality visual displays are, for example, detour indication, pedestrian marking at night, precise route navigation, visual distance warning, lane departure warning or ACC (adaptive cruise control) distance setting, i.e. setting the distance while driving with an automatic cruise control.
An apparatus for projecting image information into a field of view of an occupant of a vehicle includes:
an optical system having at least one optical element for projecting image information onto a combined surface; and
a mechanism for moving the optical system so as to adapt the projection of the image information to the eye position of the occupant.
The vehicle can have a field of view display. The visual field display can also be understood as a visual field display device or alternatively as a viewing direction display device. The visual field Display can be understood as a Head-up Display (Head-up Display) or HUD for short. A visual field display is understood to be a display device which can be used in a vehicle to add information in the form of image information, for example information of a driver assistance system, to the direction of vision or the visual field of an occupant. The occupant can be a driver of the vehicle. An optical system can be understood as a plurality of optical elements. An optical element is understood to mean a medium for guiding or diverting light. The optical element can be designed to be transparent or reflective, for example as a lens, a mirror or a diffractive element. The optical system can define a layout of optical elements. Furthermore, the optical system can have at least two optical elements for projecting image information onto the combined surface. The optical system can be described as an integral optic between the image generator and the combining surface. The optical system can be configured to direct image information provided by the image generator onto the combining surface. The combination surface can be a so-called combiner, a windshield or a separate combiner. The combined surface can be part of a vehicle in which a visual display can be arranged. The means for projecting image information into the field of view of an occupant of the vehicle can form an optical path between the image generator and the combined surface. The combination of the optical system and the mechanism for movement can be referred to as an opto-mechanical unit. The virtual image can be observed through the system on the combined face and the optical element that functions as an optical magnification device as a whole. These optical elements can comprise, in addition to the mirror surfaces, the windscreen of the vehicle. Wherein the combined surface is capable of combining the virtual image of the visual display with the surrounding environment.
Further, the mechanism for moving the optical system can be configured to move the optical system along the moving track. The movement track can be straight or approximately straight. The optical system can thus be moved linearly. The moving track can alternatively be a curved track. Thus, the optical system can be rotated around one point. For example, the optical system can be rotated about a center point of the optical element. It can be advantageous to combine linear and rotational movements. Furthermore, the movement path can be of any curved shape, so that the projection is adapted to the shape of the combined surface. The displacement or displacement can be effected by means of rolling guides or sliding guides arranged on the sides of the device. The movement along the movement path offers the advantage that the optical path of the image information can be adapted to the combination surface and at the same time to the eye position of the occupant.
The design of the displacement along the rail offers the advantage that the virtual image can be held in a constant position by the displacement being carried out substantially parallel. In one embodiment, the displacement can be corrected for the effect of the curved windshield if necessary.
It is also advantageous if the displacement path is designed such that the image information is displayed at a substantially vertically constant position during the displacement of the optical system.
It is also advantageous to configure the movement path such that the image information is displayed at a substantially vertically constant viewing angle (depression angle) when the optical system is pushed.
It is also advantageous if the optical system has a housing in which at least two optical elements are arranged. The housing can be used, for example, to configure the optical system to be dust-tight. The housing can have a cover disk, by means of which the light beam can be guided in the direction of the assembly surface. A stage can be integrated within the housing. The mechanism for moving the optical system can also be at least partially disposed within the housing. The mechanism for moving can be configured for moving the at least two optical elements within the housing or for moving the housing together with the at least two optical elements.
Furthermore, the optical system can have a housing which, in addition to the optical element, also has a cover disk. Furthermore, the device can also have a stage. The mirror platform is understood to mean a preferably sub-black surface which reflects off the mirror surface in the cover plate, and the combination of cover plate and mirror platform reliably prevents extraneous light from reflecting in the illuminated cover plate if the cover plate is curved in such a way that the occupant can see only one mirror image of the mirror platform at any point of the cover plate. Otherwise, such a reflection phenomenon may greatly disturb the occupant.
Furthermore, the optical system can also have a housing which has an image generator in addition to the optical elements.
Furthermore, the device can also have a mechanism for moving at least one of the at least two optical elements of the optical system. The mirror can then be turned over, for example. The image generator can then be pushed, for example. The mechanism for moving at least one optical element can be referred to as a single optical assembly or an internal adjustment mechanism of the element. The movement of the at least one optical element can be effected substantially synchronously with the movement of the optical system. The movement of the at least one optical element can be effected independently of the operation of the optical system, so that, for example, tolerance compensation for the combined surfaces is achieved.
Furthermore, the device can also have a flexible mechanical connection for connecting the optical system to the supporting structure of the device and simultaneously or alternatively to the dashboard. The device can be connected to a support structure in the vehicle in the installed state in the vehicle. The device can be connected to an instrument panel in a vehicle in a state of being mounted in the vehicle. The support structure can be an instrument panel. The device can be provided with a flexible transition to the instrument panel. When the device has been installed in a vehicle, the flexible transition region can be used to compensate for the varying distance of the device from the support structure as a result of the movement of the device. The flexible transition region can be a displaceable plate, as is the case, for example, in elevator doors. This has the advantage that the system does not allow for openings to contaminate or damage the interior.
It is also advantageous that the optical system comprises an image source for providing image information. If the image generator is part of an optical system, it can move with it. This enables a more compact construction.
Wherein the apparatus can include a mechanism for moving the image source in response to movement of the optical system. The image generator can then be displaced, for example, relative to at least two optical elements of the device. The image generator can be moved synchronously with the device, so that the light path from the image generator through the optical element to the combination surface and in the direction of the vehicle occupant is adapted to the eye position of the occupant.
Furthermore, the display of the image source can be adapted in correspondence with the movement of the optical system and simultaneously or alternatively in correspondence with the movement of the image source. The display of the image source can be understood as image information displayed on the image source or alternatively projected by the image source. Thus, for example, the display content or the image representation on the image source can be shifted, rotated, distorted or zoomed. The display of the image source can be manipulated by a control mechanism described below. By adapting the display of the image source, the influence of the movement of the optical system can advantageously be combined with the display of the occupant.
It is also advantageous if the device comprises a control mechanism with an interface for reading the eye position signal and an interface for outputting a control signal for moving the optical system. Wherein the eye position signal is capable of representing the eye position of the occupant. The control mechanism is configured to read the at least one eye position signal and to issue a control signal for moving the optical system. The eye position signal can be provided by an image recording device having a corresponding evaluation unit for recognizing the head position or alternatively the eye position. The eye position signal can be customized for a certain vehicle occupant. The occupant can be identified and a corresponding eye position signal provided, for example, by a key, by entering a code, or by facial recognition.
It is also advantageous if the device comprises a control unit with an interface for detecting an operating behavior of the occupant. Wherein the control mechanism can be configured to direct the mechanism for moving the optical system in accordance with the operational behavior. In one embodiment, the occupant can manually adapt the projection of the image information to the eye position of the vehicle occupant. The setting of the operating behaviour of the control mechanism can then be effected in a manner similar to the setting of an electric exterior rear view mirror.
A control means is to be understood here as an electrical appliance which processes sensor signals and emits control signals and/or data signals as a function of the sensor signals. The control device can have an interface, which can be configured in hardware and/or software. In a hardware-type configuration, these interfaces can be part of a so-called ASIC system, for example, which contains the various functions of the controller. However, it is also possible for these interfaces to be inherently integrated circuits or to be formed at least in part from separate components. In a software-type configuration, these interfaces can be software modules, which are stored on the microcontroller, for example, together with other software modules.
A method for projecting image information into a field of view of an occupant of a vehicle by means of an optical system having at least two optical elements for projecting image information onto a combined surface, comprising the following steps:
the optical system is moved so as to adapt the projection of the image information to the eye position of the occupant.
In other words, it is described that the visual field display is displaced along a defined geometric path curve, whereby the height can be adapted to the eye position of different drivers or adjusted for different seat positions. This process is also referred to below as "Smart mobility" (Smart Shifting). The trajectory profile is selected such that the image content can be projected exactly in front of the actual driving scene for each position. Therefore, the image content can be viewed at right angles to the road surface for all the moving positions of the visual field display. This is also known as the English concept "look down angle", or LDA for short. This is especially crucial for displaying AR information ("Augmented Reality").
In the unit to be pushed, i.e. the optical system, one or more optical elements can be arranged and an image source can be arranged simultaneously or alternatively. The optical elements can advantageously be arranged such that a sharp image which is as undistorted as possible can be formed for different positions in the middle.
According to an embodiment, the device can be used in a visual field display of an augmented reality display. The rolling guide or sliding guide attached to the side can be designed to move the optical system. In one embodiment, the cover plate and the stage can be integrated into the optomechanical unit. The optical system or the combination of the optical system and the mechanism for moving the optical system (which can also be referred to as an opto-mechanical unit) can be closed using a housing or a box and is therefore, for example, dust-tight or alternatively water-tight. From the housing, a flexible transition region, for example to the dashboard of a vehicle, can be realized in the direction of movement of the optical system, i.e. forward and backward. In one embodiment, the flexible transition region can include a slidable panel that resembles a sliding door. In an alternative embodiment, the flexible transition region can be designed as a bellows.
In another embodiment, the control of the displacement movement can be carried out, for example, by means of a camera device or head tracking, which is carried out individually by means of keys, face recognition or the like. The internal adjustment of the individual optical components, for example the tilting of the main mirror or the displacement of the image generator, can be substantially synchronized with the displacement, but can additionally also be designed independently, for example, as a position compensation tolerance and, at the same time or alternatively, as a shape compensation tolerance of the windshield.
One advantage of the invention is that it is possible to combine the customer requirements of a construction space that is as flat as possible and a field of view that is as large as possible. Wherein visibility of image information can be ensured for very different body sizes. The eyes of the driver can be moved within a predetermined eye movement range (EB). Advantageously, the invention makes it possible to influence or reduce the installation space required for the visual field display.
Drawings
The invention is explained in detail below by way of example with the aid of the figures. Wherein:
FIG. 1 illustrates a vehicle having a field of view display in accordance with one embodiment of the present invention;
FIG. 2 shows a schematic view of a visual field display according to an embodiment of the invention;
FIG. 3 shows a schematic view of a visual field display;
FIGS. 4 to 7 show schematic views of a visual field display according to an embodiment of the invention;
FIG. 8 illustrates a comparison of the visual field display 102 with a visual field display without an adjustable optical system, in accordance with one embodiment of the present invention;
FIG. 9 shows a flowchart of a method 900 for projecting image information into a field of view of an occupant of a vehicle, in accordance with an embodiment of the present invention;
FIGS. 10 and 11 show schematic diagrams of the change in the position of the eyes of the occupant and the resulting change in the angle to the road surface (depression LDA) in accordance with an embodiment of the present invention; and is
FIG. 12 illustrates road coverage of a contact-simulated image in accordance with an embodiment of the present invention.
In the following description of the preferred embodiments of the present invention, the same or similar reference numerals are used for elements shown in different drawings and functioning similarly, and repeated description of these elements is omitted herein.
Detailed Description
FIG. 1 illustrates a vehicle 100 having a visual field display 102 in accordance with one embodiment of the present invention. The vehicle 100 has a windshield 104. An occupant 106 is located within the vehicle. In the illustrated embodiment, the field of view display 102 includes an optical system 108 and an image generator 110. The windshield 104 serves as a combined face 104 of the field of view display 102. This combined surface combines the virtual image of the visual display 102 (HUD) with the surrounding environment: the image of the field display 102 (HUD) is reflected as a virtual image by surface reflection, which is also a transparent glass, which at the same time ensures that the surroundings of the vehicle 100 can be seen. In the illustrated embodiment, the optical system 108 has two optical elements 112. The optical system 108 is connected to a mechanism 114 for moving the optical system 108. The mechanism 114 for moving the optical system 108 is configured to move the optical system 108 along a moving track.
The mechanism 114 for moving the optical system 108 is connected to a control mechanism 116. The control mechanism 116 comprises an interface, not further shown, for reading an eye position signal 118 and for issuing a control signal 120 for moving the optical system 108. The eye position signal 118 represents the eye position 122 of the occupant 106. In the illustrated embodiment, a camera device 124 is optionally disposed in the vehicle 100. The camera device 124 is configured to emit an eye position signal 118 representative of the eye position 122 of the occupant 106. An occupant 106 sees the surroundings in front of the vehicle 100 through the windscreen 104. The image information displayed by means of the field-of-view display 102 is projected into the field of view of the occupant 106 via the windshield 104 when the image display 102 is in operation.
One aspect of the invention is to move or rotate a plurality of optical elements in a coupled manner. In the visual field display of the contact simulation type, the virtual image should not change in height when the eye movement range (eyebox) is set. When the combiner or the main mirror is simply turned over in the visual field display, the virtual image may fluctuate in height and a touch-simulated display like that required in the display of augmented reality cannot be ensured.
According to one embodiment, the visual field display 102 shown in FIG. 1 is a visual field display 102 that mechanically adjusts the plurality of optical elements 112 in a coupling manner to accommodate the eye position 122 of the driver 106. In one embodiment, the optical system 108 can be shifted as a mechanical unit supporting a plurality of optical elements 112, such as two to four mirrors, of the field of view display 102. In one embodiment, the translation of the optical system 108 is implemented substantially linearly. In one embodiment, the optical system 108 also supports an image source 110, such as a backlit display. In a not further illustrated embodiment, the optical system 108 also supports a (follower) cover disk. In one embodiment, the device, in particular including the optical system 108, is substantially dust-tight. Furthermore, in one exemplary embodiment, a single optical element 112, for example a first mirror 112, viewed from the occupant along the projection axis toward the combination surface, can additionally be individually adjusted (preferably rotationally) relative to the mechanical unit, in particular can also be mechanically or electronically coupled to the displacement movement, which means a movement of the optical system along the movement path. Additionally, in one embodiment, the image source 110 can be shifted or flipped within the optical system 108 in a coupled manner. The image display on the image source can additionally be adapted by software, for example, shifted, rotated or zoomed, coupled with the shifting movement. In one embodiment, the mechanical unit, i.e. the optical system 108, can be provided with a flexible mechanical connection with respect to the surroundings, in particular with respect to the instrument panel surface, for example with a bellows or a movable plate section similar to an elevator door.
FIG. 2 shows a schematic view of a visual field display 102, according to an embodiment of the invention. The embodiment shown in fig. 2 is a static situation for a predetermined eye position of the occupant. The visual field display 102 can be the visual field display 102 already described in fig. 1. The optical system 108 includes an image generator 110 and two optical elements 112. The image information provided by the image generator 110 is projected by means of two optical elements 112 onto the combining surface 104 and is specularly reflected therefrom into the field of view of the occupant. The combination surface 104 can be a windshield of a vehicle as depicted in fig. 1. The light path 226 from the image generator 110 via the optical element 112 and the combination surface 104 shows in which eye position or which arc position the image information displayed by the field of view display 102 can be displayed exactly. In this embodiment, the main mirror is rotated, which causes a change in the angle (depression LDA) with respect to the road surface and is disadvantageous for the touch-analog display. The area in which the eyes of the occupant must be located can be referred to as the eye movement range. In order to increase the eye movement range, a static solution can be achieved with a larger mirror surface, which has increased vertical installation space requirements. An embodiment of which is shown in figure 3 below.
Fig. 3 shows a schematic view of the visual field display 102. This embodiment has larger optical elements 112 than the visual field display 102 shown in fig. 2, thereby increasing the range known as the eye movement range within which the driver's eyes should be in order to be able to see the provided image information. The distance between the eye position below when the visual field display is in the installed state and the eye position above when the visual field display is in the installed state can be, for example, 70 mm. Such a static solution requires a larger mirror and thus a larger vertical installation space requirement than the exemplary embodiment shown in fig. 2. In other words, fig. 3 shows a static solution without "smart movement" with a larger mirror surface and correspondingly a larger vertical extension of the required installation space.
FIG. 4 shows a schematic view of the visual field display 102, in accordance with an embodiment of the present invention. A moving track 328 is shown along which the optical system 108 can be moved. In the embodiment shown in fig. 4, the moving track 328 is a straight line so that the optical system can move linearly. Fig. 5 shows the visual field display 102 shown in fig. 4 after linear movement.
In other words, fig. 4 shows a strongly simplified side view of the visual field display 102. The windshield 104 serves as a combined face 104 of the field of view display 102. It can be seen how the exclusive passage of the perimeter display box with optical element 112 along the linear trajectory curve 328 results in a change in eye position. Here, it is essential for "augmented reality" that the viewing angle of the occupant remains unchanged.
FIG. 5 shows a schematic view of the visual field display 102, in accordance with one embodiment of the present invention. A moving track 328 is shown along which the optical system 108 can be moved. In contrast to the schematic illustration shown in fig. 4, the region which is sketched by the optical path and in which the eye position of the occupant can be located is displaced by, for example, 70mm upwards. Less linear displacement of the optical system 108 results in a smaller displacement of the eye movement range.
FIG. 6 shows a schematic view of the visual field display 102, in accordance with an embodiment of the invention. The windshield 104 or the combination surface 104 is curved. Two positions of the optical system 108 are shown. Between the two positions, the optical system is linearly displaced and the optical element 112 is flipped around its center point, thereby compensating for the curvature of the windshield and adapting the projection of the image information to the eye position of the occupant. The optical element 112 is connected to a mechanism 630 for moving at least one optical element 112 of the at least two optical elements 112 of the optical system 108.
In other words, fig. 6 shows a schematic view of a windshield 104 with a bend. A schematic diagram of the "smart move" principle for a curved windshield 104 is shown. In order to compensate for the curvature of the windshield, in addition to the displacement of the viewing field display box, the first mirror or optical element 112 can be correspondingly tilted, so that the angle (LDA) relative to the road surface remains constant for all eye-movement range positions.
FIG. 7 shows a schematic view of the visual field display 102, in accordance with an embodiment of the invention. The windshield 104 or the combination surface 104 is curved as in fig. 6. The first position shown corresponds to the situation depicted in fig. 4. In order to adapt the projection of the image information to higher eye positions, in the second position the optical system 108 is linearly displaced and rotated around the center point of the optical element. This results in the entire optical element being pushed along the curved path or curved displacement path 732. In the exemplary embodiment shown, the optical system is rotated or tilted about a center point of the optical element arranged directly in front of the combining surface in the beam path.
In the embodiment shown in fig. 7, the translation and rotation of the visual field display box are superimposed such that the angle relative to the road surface (LDA) remains constant over all eye range positions. In principle, the displacement of the viewing display box does not necessarily have to be carried out linearly or horizontally, but can be adapted to the particular installation space.
FIG. 8 illustrates a comparison of a visual field display 102 according to an embodiment of the present invention with a visual field display without an adjustable optical system. The visual field display 102 can be the visual field display 102 described in the previous figures. A first position 834, a second position 836, and a third position 838 of the optical system of the field of view display 102 are shown, wherein the optical system of the field of view display 102 is linearly shifted between the positions 834, 836, and 838. The installation space required for obtaining the same range of possible eye positions of the occupant, i.e. the approximate eye movement range, without an adjustable optical system is designated by reference numeral 840. The critical area 842 in this case interferes with the steering column of the vehicle. It is clear here that a saving of installation space is possible by means of the adjustable optical system.
In other words, fig. 8 comparatively shows the construction space required for the visual field display in the case of smart movement and in the case of non-smart movement. The first position 834 covers the lowermost eye movement range position, the second position 836 covers the middle eye movement range position and the third position 838 covers the uppermost eye movement range position. Without intelligent movement, the optical elements, in particular the mirror surfaces, must be designed to be significantly larger in the vertical direction in order to cover all eye-movement range positions simultaneously. This can lead to space problems in particular in the region of the steering column. Thus, the gain in construction space is particularly advantageous in critical areas of the steering column.
Fig. 9 shows a flowchart of a method 900 for projecting image information into a field of view of an occupant of a vehicle according to an embodiment of the invention. The method can be implemented with an optical system having at least two optical elements as described in the preceding figures for projecting image information onto a combined surface. The method 900 has a step 902 of moving the optical system so as to adapt the projection of the image information to the eye position of the occupant.
Fig. 10 shows a schematic diagram of the change in the position of the eyes of the occupant and the resulting change in the angle to the road surface (depression LDA) according to an embodiment of the present invention. The vehicle 100 has a windshield 104. In the vehicle, there are passengers, not shown in detail, whose eyes can be located in different eye positions 122. A virtual image 1045 seen from the occupant is shown in front of the vehicle in the traveling direction. For the embodiment shown in fig. 10, the rotation and the simultaneous or alternative displacement of the optical system (denoted therein by reference numeral 108) described in the preceding figures can be designed such that the angle with respect to the road surface remains constant as the eye position 122 changes. Thus, first viewing direction 1044a associated with first eye position 1046a is oriented parallel to second viewing direction 1044b associated with second eye position 1046b and third viewing direction 1044c associated with third eye position 1046 c. The angle with respect to the road surface, i.e. the LDA or the depression, is then made constant at different eye positions 122.
Fig. 11 shows a schematic diagram of the change in the position of the eyes of the occupant and the resulting change in the angle to the road surface (depression LDA) according to an embodiment of the invention. The vehicle 100 has a windshield 104. In the vehicle, there are passengers, not shown in detail, whose eyes can be located in different eye positions 122. A virtual image seen from the occupant is shown in front of the vehicle in the traveling direction. For the embodiment shown in fig. 11, the rotation and the simultaneous or alternatively displacement of the optical system (denoted here by reference numeral 108) described in the preceding figures can be designed such that the vertical position of the virtual image 1045 in space remains constant as the eye position 122 changes. Thus, the first viewing direction 1044a associated with the first eye position 1046a intersects the second viewing direction 1044b associated with the second eye position 1046b and the third viewing direction 1044c associated with the third eye position 1046c in a point of the virtual image 1045. The viewing direction is also understood to be the optical axis from the virtual image.
Observing the embodiments shown in fig. 10 and 11, any mixing or transition between the two possibilities or embodiments shown is possible. The aim here is primarily to be able to achieve a certain coverage of the road for all eye positions or for all positions of the eye movement range.
In the limit of large virtual image pitch (about 15m in our case), these two cases are almost indistinguishable (EB =15m for virtual image pitch EB adjustment scale range: vertical, 40-100 mm).
FIG. 12 illustrates road coverage of a contact-simulated image according to an embodiment of the invention. The vehicle 100 is on a travel track 1248. In the vehicle there is an occupant, not further shown, which is denoted by reference numeral 106 in the preceding figures. The eyes of the occupant are in a particular eye position 122 and the vehicle has a windshield 104 that functions in the field of view display. The virtual image 1045 is displayed at a distance 1250 before the virtual image's eye position. The height 1252 of the eye position 122 beyond the travel track 1248 represents the horizon 1254. The limits of the occupant's field of view are defined by an upper limit 1256 of the field of view and a lower limit 1258 of the field of view. The range between the upper and lower limits 1256, 1258 of the field of view can be represented as a vertical field of view 1260 or simply a vertical FOV as used in the english concept "field of view". The intersection of the lower limit 1258 and the travel path 1248 gives a contact-simulated display of the minimum covering distance 1262 over the virtual image 1045. The maximum coverage distance 1264 of the field of view is given by the intersection of the upper limit 1256 and the travel track 1248. The angle 1266 relative to the road surface or track 1248 is clearly defined in fig. 12. The angle 1266 to the road surface is determined by the angle between the horizon 1254 and an intermediate position 1268 between the upper and lower limits 1256, 1258.
The road overlay of the virtual image 1045 is shown between the intersection of the lower limit of field of view 1258 and the travel path 1248 and the intersection of the upper limit of field of view 1256 and the travel path 1248.
The embodiments described and shown in the figures are selected by way of example only. The different embodiments can be combined with each other completely or with regard to individual features. One embodiment can also complement the features of another embodiment. Furthermore, the method steps according to the invention can be repeated and performed in a different order than described.
If an exemplary embodiment includes an "and/or" connection between a first feature and a second feature, it is stated that the exemplary embodiment has not only the first feature but also the second feature according to one specific embodiment, and in another specific embodiment either only the first feature or only the second feature.
Claims (9)
1. Device for projecting image information into the field of view of an occupant (106) of a vehicle (100), wherein the device has the following features:
an optical system (108) having a housing in which at least one optical element (112) for projecting the image information to a combining surface (104) and an image source (110) for providing the image information are arranged; and
a mechanism (114) for moving the optical system (108) in order to adapt the projection of the image information to the eye position (122) of the occupant (106), wherein the mechanism (114) for moving the optical system (108) is configured to move the optical system (108) along a movement path and to configure the movement path in such a way that the image information is displayed with a vertically constant depression angle when the optical system (108) is displaced.
2. The device according to claim 1, wherein the optical system (108) has at least two optical elements (112) for projecting the image information to the combining plane (104).
3. The device according to claim 1 or 2, wherein said housing has a cover disc in addition to said optical element (112).
4. The device according to claim 1 or 2, having a mechanism (114) for moving at least one (112) of the at least two optical elements (112) of the optical system (108).
5. The device according to claim 1 or 2, having a flexible mechanical connection for connecting the optical system (108) with a support structure of the device and/or with a region of a dashboard of the device.
6. The apparatus of claim 1 having a mechanism to move said image source (110) in response to movement of said optical system (108).
7. The apparatus of claim 1 or 2, wherein the display of the image source (110) is adaptable in correspondence with the movement of the optical system (108) and/or the image source (110).
8. The device according to claim 1 or 2, having a control mechanism (116) with an interface for reading an eye position signal (118) and an interface for issuing a control signal (120) for moving the optical system (108), wherein the eye position signal (118) represents an eye position (122) of the occupant (106).
9. Method for projecting image information into the field of view of an occupant of a vehicle by means of a device according to one of claims 1 to 8.
Applications Claiming Priority (2)
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| DE102013208971.6A DE102013208971A1 (en) | 2013-05-15 | 2013-05-15 | Apparatus and method for projecting image information into a field of view of a vehicle occupant of a vehicle |
| DE102013208971.6 | 2013-05-15 |
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| CN104166238A CN104166238A (en) | 2014-11-26 |
| CN104166238B true CN104166238B (en) | 2020-04-14 |
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| CN (1) | CN104166238B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| DE102013208971A1 (en) | 2014-11-20 |
| FR3005752A1 (en) | 2014-11-21 |
| FR3005752B1 (en) | 2020-01-10 |
| CN104166238A (en) | 2014-11-26 |
| JP2014225017A (en) | 2014-12-04 |
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