Improvement of hud image quality via the dominant eye, which is determined by the user's subjective assessment of the hud image

Abstract

The present invention relates to a method for operating a field of view display device, wherein the field of view display device comprises an image generator and a reflective disc for generating a beam of light that provides the same display content to both eyes, so that, as a result, the display content is displayed to the user as a real or virtual image floating in the air through reflection from the reflective disc. At this time, the current positions of the user's two eyes are dynamically determined; in this case, for each point within the eye box, a pre-distortion of the display content that optimizes the image for the single eye located at that point is predetermined. To the user, pattern display content that is pre-distorted is displayed once for the current position of his left eye and once for the current position of his right eye; in this case, a query regarding the determination of the user's subjective preference between these two displays is accompanied, and the selected eye is stored as the dominant eye. The field of view display device is operated using the pre-distortion of the display content for each current position of the eye stored as the dominant eye, or, if there is no stored content, is operated using the pre-distortion of the display content for the position centered between the user's two eyes.

Description

Technology Field

[0001] The present invention relates to a method for operating a field of view display device, also known by the designation Head-up Display (HUD). Such a device may be used particularly in automobiles or other types of land, air, or water transport vehicles. Such a device is used to generate a real or virtual image that fades in into the user's field of view through reflections from a mostly or at least partially transparent reflective disc, such as the windshield or rear window of a vehicle, for example, or through reflections from a combiner disc provided specifically for this purpose and arranged within the user's field of view. The present invention also relates to a correspondingly designed control unit, a projection unit designed to output a suitable beam of light, a field of view display device comprising said projection unit, and a vehicle equipped with said device. Background Technology

[0002] In this context, for example with respect to automobiles, it is known that a head-up display (HUD) is used to superimpose display content, such as speed limit instructions or other useful navigation and vehicle operation instructions, onto a virtual image of the actual surrounding environment observed by the driver in front of the vehicle, thereby allowing the driver to read such a display without diverting their gaze from the road. In a traditional configuration, the HUD includes a projection unit installed beneath the windshield within the instrument cluster. This projection unit typically includes a display that generates the desired display content and suitable imaging and projection optics, which mostly include a concave mirror. In this design, a beam of light originating from the display is formed and deflected toward the windshield, so that this beam of light is reflected from the windshield toward the driver's eye, thereby allowing the driver to view the virtual image at a suitable size and at a suitable distance beyond the windshield. A similar system may also be provided for passengers and / or other occupants in the vehicle. For example, for a virtual display spanning a wide panoramic area, a simplified HUD design is also known that features a flat screen or waveguide display extending directly from the lower glass area of ​​the windshield, that is, a flat screen or waveguide display without imaging and projection optics such as a concave mirror.

[0003] Furthermore, in addition to virtual image displays, a method of generating a real image floating in the air for one or more observers inside a vehicle using an imaging concave mirror is also known, for example, from CN 217821128 U, in which case the beam path also leads to the driver and passenger's eye box through reflection from the windshield.

[0004] However, most Head-Up Displays (HUDs) fail to provide perfect images. This is due, on one hand, to the system's general structural design, and on the other, to the unavoidable tolerances of the specific devices, or the image generators, projection units, and reflective discs within the vehicle. While the negative impact of the design can be significantly reduced through corresponding optimization during the development and production processes, system calibration must be performed after assembly within the vehicle to account for tolerances in specific individual situations. Nevertheless, despite these measures, it is nearly impossible to obtain a perfectly distortion-free image with traditional HUDs. Even with the use of dynamic warping technology that detects eye position and adjusts warping accordingly, obtaining a perfectly distortion-free image will remain impossible unless an autostereoscopic HUD is used. The reason is that dynamic distortion can only reflect prior distortion for a single point between the two eyes (in other words, the cyclopean eye), making it impossible to subsequently provide a perfect, distortion-free image for the right eye as well as the left.

[0005] The above-mentioned problems are schematically illustrated in FIG. 4, which is shown in a slightly enlarged and exaggerated form for the purpose of clarifying the overview of the drawing. HUD-Image (V ZA / R ZA ) is perfectly displayed for the monocular that will be placed between the actual positions of the user's left and right eyes, while the left and right eyes are each rotated and moved images (V LA / R LA or V RA / R RA) is seen. For other details, refer to the more detailed description of Fig. 4 that follows in the last part of this document.

[0006] In this regard, for example, DE 10 2021 211 703 A1 proposes a correction unit designed for generating an image of a head-up display and adjusted to the position of the eyes within the eye box. This correction unit can perform a pre-distortion of the image to be displayed based on the detected eye position, such pre-distortion ensuring that the image seen from the detected eye position is displayed excellently and, in particular, that distortion and / or color non-uniformity is reduced or minimized. Here, the adjustment to the eye position is preferably a joint adjustment to the position of at least both eyes (i.e., a pair of eyes). Such an adjustment can be achieved, for example, by averaging the detected positions of both eyes. Since a pair of eyes does not have a very large gap, according to DE 10 2021 211 703 A1, an acceptable adjustment for both eyes can be achieved in this manner. However, separate adjustments may also be made for each detected eye, or, for example, adjustments may be performed only on a single eye of a pair, for example, the strong eye or the eye that is dominant during the viewing process.

[0007] Additionally, JP 2005-138755 A discloses a virtual display system. This system includes a head-up display (HUD) mounted on a vehicle and displaying a virtual image on the vehicle's windshield via reflection, a focus identification camera that captures an image of one of the driver's eyes, and a gesture identification camera that captures an image of one of the driver's hands. When the driver points at the displayed virtual image with a finger, the HUD identifies and processes the individual images captured by the focus identification camera and the gesture identification camera, and the HUD determines the driver's direction of gaze by identifying the driver's eye position and finger position. As a result, the virtual image along the eyeline is determined. Subsequently, when the driver wipes the object with a hand, the image captured by the gesture identification camera is identified, and processing is performed to confirm that a command to erase the virtual image has been entered. As a result, the specified virtual image is erased. At this time, it is more efficient to use the field of view of the dominant eye rather than the field of view of the non-dominant eye to determine the location of the object.

[0008] At this time, the dominant eye is determined by reference to the fact that a person generally sees an object in any positional relationship as if through the right or left eye, that is to say, through their "dominant eye." Since this situation is particularly pronounced when pointing to a distant object, consequently, in JP 2005-138755 A, a predetermined symbol or word, such as "PUSH," is displayed to the driver as a virtual image for the identification of the dominant eye, along with a request to point to the corresponding eye with a finger. The dominant eye is identified by being placed on a line having the displayed symbol / word and the position of the fingertip pointing to such symbol / word, while the other eye is not placed on this connecting line.

[0009] The object of the present invention is to provide a method for operating a field of view display device that is improved in terms of one alternative and / or displayability, image quality, robustness, and other aspects, and a projection unit for a vehicle and a field of view display device designed correspondingly to this method.

[0010] The above problem is solved by the method according to claim 1 for operating a field of view display device in a vehicle, and by a control unit, a projection unit, a field of view display device including these units, and a vehicle equipped with them, according to the respective independent claims corresponding to the method. Other embodiments are specified in the dependent claims. All additional features and effects mentioned within the scope of the claims and in the following detailed description of the method also apply to the control unit, the projection unit, the field of view display device, and the vehicle, and vice versa.

[0011] According to a first embodiment, a method for operating a field of view display device is proposed. This field of view display device may be designed, for example, as a head-up display (HUD). This device may be designed for use in a vehicle, in particular (but not necessarily). The vehicle may be an automobile, but may also be any other land, air, or water vehicle. Unless otherwise specified, when applied to a vehicle, position display and spatial orientation terms mentioned herein, such as “vertically,” “horizontally,” “to the left,” “to the right,” “below it,” “above it,” etc., relate to a conventional vehicle fixed orthogonal coordinate system having the longitudinal, transverse, and vertical directions of the vehicle that are perpendicular to each other.

[0012] A field of view display device includes an image generator formed and designed to generate beams of light with the same desired display content for both eyes of the user. (Therefore, this device is not designed for glasses-free stereoscopic displays.) Additionally, the field of view display device includes reflective discs arranged within the user's field of view, and these reflective discs may be translucent, particularly (but not necessarily). Optionally, the field of view display device may also include imaging and / or projection optics designed to form beams of light generated by the image generator and to deflect them toward the reflective discs, although in this case, a design without imaging and / or projection optics as mentioned in the introduction may also be possible. Depending on the application-specific design of the field of view display device and, in particular, the imaging and / or projection optics of this device present in some cases, during operation, a real image floating in the air between the user and the reflective discs, or a virtual image that appears to the user to be floating beyond the reflective discs, is generated. When applied to a vehicle, the user may be, for example, the driver, passenger, or other occupant of the vehicle.

[0013] During the operation of the field of view display device, the current positions of both of the user's eyes are determined dynamically (in the sense of being "continuously updated," "continuously," or "at each point in time"). An eye-tracking sensor device suitable for this purpose may include, for example, one or more cameras and may be mounted in a vehicle in any case for the purpose of monitoring a driver or passenger.

[0014] In this case, for each point within the eyebox predetermined for the user's eye, the pre-distortion of the desired display content is predetermined in such a way that the image display is optimized when observed by the single eye located at that point. This pre-distortion is also referred to as "dynamic distortion" because it depends on the dynamically determined position of the observing eye. As a result, any deviation of the displayed image from the ideal image for a single eye can be compensated. As mentioned in the introduction, such deviations can be caused, on the one hand, by changes in the position of the eye within the eyebox, but on the other hand, by often unavoidable (installation) tolerances and / or, in some cases, by layout characteristics of the entire optical system (e.g., windshield curvature) that cannot be optimized or are not optimized in other ways.

[0015] In the present invention, an eyebox may be understood as a spatial region defined in two or three dimensions as is customary, from which an image displayed by a visual display device is seen in an unrestricted state or with the intended display quality. When applied to a vehicle, an individual user eyebox within the cabin is pre-designated and may be spatially limited, for example, to the relevant seat.

[0016] In the present method of operation, a predetermined pattern display content is presented to the user upon a predetermined trigger, and this pattern display content is pre-distorted sequentially at time intervals perceptible to the human eye, once for the current position of the user's left eye and once for the current position of the user's right eye. Simultaneously or thereafter, a query regarding the determination of one's subjective preference between these two displays is output to the user through any suitable user interface (e.g., visually and / or audibly). When the user responds to this, the user's response input is received (through the same or a different user interface, e.g., also through a button or touchscreen), and the eye among the user's two eyes for which the display of the pattern display content selected by the user is optimized is stored as the dominant eye. This method for determining the dominant eye of a user of a vision display device introduced herein may be activated automatically, for example, when the user first begins using the vision display device, and / or may be activated via a user menu upon the user's request.

[0017] In the present method, the field of view display device operates by pre-distorting the display content for each current position of the user's eye stored as the dominant eye, or for each central position between the user's two eyes (i.e., for a single eye) if nothing is stored.

[0018] In the prior art, there exists only a parallax-based dominant eye determination method that always draws a single connecting line between the observer's dominant eye, the observer's index finger, and a distant point / object pointed to by the observer. In contrast, the present invention inquires whether overall superior prior distortion is induced for a single identical pattern display content when observing with two eyes on such a specific field of view display device, based on the user's subjective impression and by referring to pattern display content that is as credible as possible for display performance, and which of the user's two eyes causes overall superior prior distortion. In particular, regarding large displays or shape and / or color reproduction, it has been revealed that such subjective choices by the user frequently yield results completely different from those of the conventional parallax-based dominant eye determination method (in other words, there are cases where the user does not feel a preference for one eye or prefers the other eye compared to the conventional parallax-based determination method).

[0019] Thus, one idea of ​​the method introduced is to solve the above problem illustrated in FIG. 4 by utilizing the fact that most people have a somewhat stronger dominance over one eye, and that a method is provided to determine whether dominance appears for such a specific type of display and which eye is dominant based solely on the user's subjective evaluation of image quality. As a result of the determination method introduced herein, if it is known which eye is the dominant eye of a specific user (e.g., a driver), dynamic distortion during the operation of the field of view display device can now be adjusted directly to the detected position of the user's dominant eye, thereby allowing a perfect HUD image to be displayed to the driver.

[0020] Ideally, the pattern display content mentioned above is predetermined to be as credible as possible for the user to evaluate the display performance of the entire optical structure of the field of view display device. For this purpose, the pattern display content may include patterns and colors that enable excellent identification of shape and color reproduction, for example, within the displayed image. In simple cases, for example, calibration display content provided for system calibration may also be used or serve as the basis (and, in some cases, may be supplemented by other color and shape variations).

[0021] In particular, for this purpose, pattern display content may also be extended over at least one-third, better over at least one-half, and even better over the entire individual linear area or angular dimension of the display area that can be entirely covered by the field-of-view display device within the user's field of vision (i.e., the so-called field of view (FoV)). This provides the user with comprehensive information / reasons for decision to determine their subjective preference between two performances of the field-of-view display device, optimized for only one eye of each eye, with respect to the total available image size / image area.

[0022] As previously mentioned, in the method of operation introduced herein, the routine for determining the user's dominant eye may be activated, for example, by automatically identifying a new user of the visual display device; by receiving the initial user-side registration as a user of the visual display device; and / or by receiving a user-side input specifically determined to determine the dominant eye as mentioned. The latter input may be made available to the user, for example, through a suitable menu, in which case the relevant menu item may be specified, for example, as "Selection of HUD-display optimized for you" or "Activation of automatic determination of your dominant eye."

[0023] The mentioned prior distortion (i.e., dynamic distortion) that must be pre-set as a prerequisite for the described method of operation can be achieved, above all else (but neither exclusively nor mandatory), by calibrating a visual display device, such as a full HUD system, after assembly in the vehicle, and such calibration compensates for individual situational or vehicle-specific tolerances.

[0024] According to one embodiment, the pre-distortion referred to as a preceding process prior to operation is predetermined by a calibration process executed at a plurality of calibration locations within the user eyebox, wherein the pre-distortion, which compensates for the (installation) technical tolerance deviation of the field of view display device at each calibration location, is determined and stored by a predetermined manual and / or automatic calibration routine by referring to one or more predetermined calibration display contents and by referring to an optical camera that replaces a single eye and captures the resulting image. In this case, for all locations located between such calibration locations, the pre-distortion may be determined by interpolation. In this case, the referred calibration locations may and must include five or more calibration locations defined by four eyebox corners and one eyebox center within a two-dimensional eyebox oriented perpendicular to beam propagation, for example, for a rectangular eyebox, thereby enabling reasonable interpolation. The inaccuracy generated by interpolation may be reduced when many more camera locations are used in the calibration process.

[0025] According to one embodiment, the field of view display device further comprises an imaging and / or projection optical device arranged and formed within the beam path of a beam of light generated by an image generator, such that a beam of light is projected onto a reflective disc in a predetermined shape and direction to be reflected to the user's eye by a reflective disc and thereby display the display content to the user as a floating real or virtual image. For example, the imaging and / or projection optical device may include one or more concave mirrors, the inclination angle of the concave mirrors may be adjustable with respect to the optical axis of the projection unit to change the direction of expansion of the beam of light and thereby adjust the image and eyebox position to the user. Individual concave mirrors may be designed for, for example, deflection, image magnification, imaging, collimating, and / or image correction optical functions. However, alternatively or additionally, the imaging and / or projection optical device may also include other optical elements such as lenses, plane mirrors, etc., having such or other optical functions.

[0026] Alternatively to the above embodiment, the field of view display device may be formed without imaging and projection optical devices, such as concave mirrors, for example, for a virtual display over a wide area or in a panoramic form. Thus, the field of view display device may include a flat screen or waveguide display extending along the lower glass area of ​​the windshield, for example when installed in a vehicle, and the display content of the screen or waveguide display is directly reflected within the windshield or other combiner disk.

[0027] According to another embodiment, a control unit is provided that is formed and designed to automatically execute the method introduced herein. For this purpose, a corresponding computer program (software) may be loaded, for example, within the processor of the control unit and may be executed during the operation of the visual display device.

[0028] According to another embodiment, a projection unit for the field of view display device is provided. The projection unit may be enclosed by a protective housing (with or without a transparent cover disc), for example. The projection unit comprises the image generator, and for image generation, any image generation technology suitable for use in a vehicle, if necessary, is suitable. For example, it may be a flat screen or a waveguide display, and it may also be a projector-based image generator. The projection unit may also include the control unit, which is designed to control the image generator and, if necessary, also an adjustable imaging and / or projection optical device to execute the method introduced herein. According to a variant embodiment, the projection unit may further include the imaging and / or projection optical device specifically mentioned above.

[0029] According to another aspect, a field of view display device is provided that includes a projection unit and a reflective disc arranged within the beam path of a beam of light output from the projection unit. The reflective disc is arranged / can be arranged and designed to reflect the beam of light into a predetermined eyebox for the user, thereby allowing the display content to appear to the user as a floating actual image or a virtual image. However, the reflective disc may be at least partially transparent to allow the user to also see the actual surrounding environment, but is not required to be so.

[0030] According to another embodiment, the vehicle is provided. The vehicle comprises a cabin and vehicle glass, in particular a windshield, that at least partially defines the cabin. Additionally, the vehicle is provided with the above-described field of view display device, the projection unit of the field of view display device may be arranged within the cabin, in particular within an instrument panel arranged below the windshield, and the reflective disc of the field of view display device may be formed as a section of the vehicle glass or as a combiner disc arranged within the cabin. Brief explanation of the drawing

[0031] The aspects of the present invention, their embodiments, and specific designs described above are explained in more detail below with reference to examples illustrated in the attached drawings. The drawings should be understood as schematic drawings and not to scale. In the drawings, FIG. 1 illustrates a cross-sectional view of a vehicle equipped with a field of view display device according to one embodiment of the present invention, designed for displaying a virtual image. FIG. 2 illustrates a cross-sectional view of a vehicle equipped with a field of view display device according to another embodiment of the present invention, designed to generate a real image floating inside the vehicle. FIG. 3 is a diagram schematically illustrating the process of generating an image of a field of view display device viewed from the viewpoint of each individual eye of a user in a method according to one embodiment of the present invention, wherein prior distortion is applied to the right eye determined as the dominant eye. FIG. 4 is a diagram schematically illustrating the process of generating an image of a field of view display device viewed from the viewpoint of each individual eye of a user according to a method according to the prior art, wherein in this figure, prior distortion is applied to one eye. Specific details for implementing the invention

[0032] All various embodiments, variations, and specific design features of the method, control unit, projection unit, field of view display device, and vehicle according to the embodiments of the present invention, as mentioned in the detailed description above and in the subsequent claims, may be implemented alternatively or additionally in the examples illustrated in FIGS. 1 through 3, particularly with respect to the features illustrated in these examples. For this reason, all such features are not repeated below. The same applies correspondingly to the definitions of terms and effects already specified above with respect to the individual features illustrated in FIGS. 1 through 3.

[0033] FIG. 1 shows a highly simplified schematic cross-sectional view of an embodiment of a vehicle (1) equipped with a field of view display device (2) introduced herein, which is designed to generate a virtual image (V) within the user's field of view in a virtual image plane positioned almost horizontally in front of the vehicle (1) (again, purely exemplary in this drawing). The vehicle (1) is an automobile in this example, and the automobile is implied in FIG. 1 only by its own windshield (3), which is used as a reflective disc for the field of view display device (2). A projection unit (5) of the field of view display device (2) is arranged within an instrument panel (4), which is not shown in detail below. Again, purely exemplary, a head-up display (HUD) is used.

[0034] The projection unit (5) includes an image generator (6), designed to generate desired display content, in this example, an LCD (liquid crystal display). The generated display content is emitted from the display surface of the liquid crystal display and delivered to the user's (in this example purely exemplarily, the driver's, not otherwise shown) eyebox (E) inside the vehicle (1), and the beam of light (L), also referred to herein as "projection light," is implied in a simplified form by a self-centered ray extending approximately from the center of the display surface to the center of the eyebox (E).

[0035] In this particular example, the projection unit (5) includes an imaging and / or projection optical device within another beam path of the beam of light (L), and this optical device includes a concave mirror (7) that can be adjusted to adjust the position of the eyebox. Here, the image generator (6) and the concave mirror (7) are arranged and designed so that the beam of light (L) is reflected to the eyebox (E) by the reflection disc (3) after leaving the projection unit (5) in a suitable shape and direction, and thereby the display content is shown to the user as a virtual image (V) having desired display characteristics. In this case, to obtain the desired tilt angle of the virtual image plane, the image generator (6) is arranged such that, in this example, the image generating display surface of the image generator is arranged at a suitable display tilt angle with respect to the mentioned center beam.

[0036] Additionally, the projection unit further includes a control unit (8) designed to execute a method according to one embodiment of the present invention and configured to correspondingly control an image generator (6) and to dynamically determine an eye position or to read and output a sensor (not shown) provided for this purpose.

[0037] In this method, the current position of both eyes of the user is continuously determined during the operation of the field of view display device (2). In this specific example, a dynamic distortion (i.e., depending on the currently determined eye position) is also provided for application to the image generator (6) by calibration of the entire HUD system performed in a preceding process (e.g., after vehicle assembly), and such dynamic distortion compensates for vehicle-specific tolerances above all else.

[0038] In addition, the present method utilizes the fact that most people (but not all!) have a somewhat stronger dominance in one eye. If information regarding the driver's dominant eye is stored in the control unit (8), the dynamic distortion is adjusted to the detected position of the driver's dominant eye, thereby displaying a perfect HUD-image (V) to the driver of the vehicle (1) (see FIG. 3). Conversely, if information regarding the user's dominant eye is not stored, or if both of the user's eyes are stored as dominant eyes, the dynamic distortion is applied to the single eye located between the user's left eye and the user's right eye (see FIG. 4), in other words, in this case, it is moved as in the prior art that does not consider the dominant eye.

[0039] A routine for determining the user's dominant eye is integrated into the method introduced herein and can be activated, for example, through a user menu and / or automatically upon initial use. This routine is subdivided to suit the specific display characteristics and performance requirements of the individual viewing display device (2), is based on the individual user's subjective choice, and is at the same time simple, fast, and very user-friendly.

[0040] For this purpose, the user is alternately displayed pattern HUD-images generated from suitable pattern display content (not otherwise shown) within the image generator (6) and optimized once for the left eye position and once for the right eye position by individual dynamic distortion. Then, through a suitable user interface, the observer can select which of the two variations of the same pattern gives the observer a subjectively better / more comfortable impression (in response to a query displayed simultaneously). When the user responds to this query, the eye corresponding to the selected image is stored as the user's dominant eye. If the user is not yet known to the vehicle (1), the user only needs to perform this procedure once. Afterward, the vehicle (1) recognizes the user again and automatically applies the correct distortion.

[0041] In this example, correction for dynamic distortion requires multiple correction positions within the eyebox (E) so that distortion can be adjusted according to individual eye positions. In this case, five camera positions are the absolute minimum {correction positions at the corners of the eyebox (E) and at the center of the eyebox}. For eye positions located between these camera positions, distortion can be determined by interpolation. Inaccuracies generated by interpolation can be reduced by using more camera positions during correction.

[0042] By this method, the subjectively perceived quality of the HUD image (V) can be improved by displaying an image (V) adjusted to the user's individual visual habits. A monocular approach can also be used for users who exhibit weak dominance of one eye. Such users do not experience improvement with this method, but they do not experience a deterioration in the HUD user experience compared to conventional displays (see FIG. 4).

[0043] FIG. 2 shows a cross-sectional view of a vehicle (1) equipped with a field of view display device (2) according to another embodiment of the present invention, wherein the device is designed to generate a real image (R) floating inside the vehicle (as the only difference from FIG. 1) {instead of the virtual image (V) of FIG. 1}. Furthermore, to avoid repetition, the above detailed description of FIG. 1, which is similarly applied in this embodiment, is referenced.

[0044] FIG. 3 shows a schematic comparison of the image generation process of the field of view display device (2) viewed from the viewpoint of each individual eye of the user, in which case a pre-distortion is applied to the right eye determined as the dominant eye according to the method according to one embodiment of the present invention. Since the field of view display device (2) may be the field of view display device illustrated in FIG. 1 or the field of view display device illustrated in FIG. 2, particularly {with or without a concave mirror (7)}, the above detailed description of the field of view display device (2) and the method of operation thereof made with reference to FIG. 1 and FIG. 2 is consequently referenced to avoid repetition. The field of view display device (2) also does not necessarily need to be mounted inside a vehicle (1), but rather may also be used, for example, inside a building or as a component of a portable device {such as a helmet equipped with a visor}.

[0045] In FIG. 3, the image generator (6) of the field of view display device (2) is shown in a highly simplified plan view with respect to its own image generating surface, but is not shown in actual size and position with respect to the reflective disk (3) of the field of view display device (2). Such a depiction is of the display content (9) generated within the image generator (6). RAIt best illustrates the prior distortion of ), wherein this prior distortion is optimized for the user's right dominant eye. In FIG. 3, both of the user's eyes are positioned within the eyebox (E) of the field of view display device (2) predetermined for them, and the display content (9) generated within the image generator (6) RA ) is looking toward the reflective disc (3) which is transmitted through the optical entire system (10) of the field of view display device (2) (not illustrated in detail in FIG. 3, see FIG. 1 and FIG. 2 in relation thereto). At this time, the display content (9 RA The beam of light (L) that carries the light reaches the user-eyebox (E) through reflection from the reflective disc (3).

[0046] FIG. 3 shows the resulting HUD image (V) as seen from the user's left eye. LA or R LA ) and the resulting HUD image (V) obtained as a result, such as what is seen from the user's right eye. RA or R RA It shows ). Since the dominant eye and its position are known, this eye always has a perfect HUD image (V RA or R RA ) so that ) appears, and conversely, the user's other eye in relation to this, a moved and rotated HUD-image (V, shown slightly exaggerated in FIG. 3 for the purpose of clarifying the overview of the drawing) LA or R LA The distortion (pre-distortion) is adjusted so that ) can be seen.

[0047] FIG. 4 shows a schematic diagram similar to FIG. 3 of a field of view display device (200) (here also a HUD) known in the prior art, and the control unit (800), image generator (600), reflective disc (300), and entire optical system (100) of the device, for a single eye positioned between the actual positions of the user's right and left eyes, a HUD-image (V ZA / R ZA While ) is displayed perfectly, the user's left and right eyes each display a slightly rotated and moved image (V LA / R LA or V RA / R RA It is designed to view ). In other words, here, the display content (9) generated within the image generator (600) is shown. ZA The prior distortion of ) is optimized for the single eye positioned in the center between the user's two eyes due to a lack of information regarding the user's dominant eye. As previously mentioned, if the user cannot or does not wish to choose between two displays of pattern display content optimized for only one eye, the latter method can also be used as an exceptional solution within the framework of this method. Explanation of the symbols

[0048] 1: Vehicle 2: Field of View Display Device, HUD 200: Conventional field of view display device, HUD 3: Windshield, reflective disc 300: Conventional reflective disc 4: Instrument panel 5: Projection Unit 6: Image Generator 600: Conventional image generator 7: Concave Mirror 8: Control Unit 800: Conventional control unit 9 RA: Display content optimized for the user's right dominant eye 9 ZA Display content optimized for one eye 10: Entire optical system 100: Conventional entire optical system V LA / R LA HUD image viewed from the user's left eye V RA / R RA HUD image viewed from the user's right eye V ZA / R ZA HUD Image Viewed from One Eye L: Beam, also referred to as projected light E: iBox V: Virtual image R: Actual image, floating

Claims

Claim 1 A method for operating a field of vision display device (2) comprising an image generator (6) for generating a beam of light (L) having the same desired display content for both eyes of the user and a reflective disc (3) arranged within the user's field of vision, wherein the display content is consequently displayed to the user as a real image or virtual image (R, V) floating in the air through reflection from the reflective disc (3), wherein: - the current position of both eyes of the user is dynamically determined during the operation of the field of vision display device (2); - for each point within a predetermined eyebox (E) for both eyes of the user, a predetermined distortion of a type of display content optimized for viewing by a single eye located at said point is predetermined; - to the user, a predetermined pattern display content is displayed sequentially at a time interval perceptible to the human eye, once for the current position of his left eye and once for the current position of his right eye, wherein a query regarding the determination of the user's subjective preference between these two displays is accompanied or followed, and if necessary, the user's response input is received, and thereby the selected eye of the user It is stored as the dominant eye; and— the above-mentioned field of view display device (2) is a display content (9) for each current position of the eye stored as the dominant eye. RA It operates using prior distortion of ), or if there is no stored content, display content (9) for a position centered between each of the user's two eyes. RA A method for operating a field of view display device (2) that operates using prior distortion of ). Claim 2 A method for operating a field of view display device (2), wherein the pattern display content extends over at least one-third, preferably over at least one-half, and particularly preferably over the entire individual linear area dimension or angular dimension of a display area that can be entirely covered by the field of view display device (2) within the user's field of view. Claim 3 A method for operating a visual display device (2), wherein the trigger is determined by each individual event among an event of automatically identifying a new user of the visual display device (2); and / or an event of receiving the initial user-side registration as a user of the visual display device (2); and / or an event of receiving a user-side input determined in particular for determining the dominant eye. Claim 4 A method for operating a field of view display device (2), wherein the prior distortion is determined by a correction process performed at a plurality of correction locations within a user eye box (E), wherein the prior distortion, which compensates for the (installation) technical tolerance deviation of the field of view display device (2) at each correction location, is determined and stored by a predetermined manual and / or automatic correction routine by referring to one or more predetermined correction display contents and by referring to an optical camera that replaces a single eye and captures the resulting image; and wherein the prior distortion for all locations between the correction locations is determined by interpolation. Claim 5 A method for operating a field of view display device (2), wherein the correction positions include five or more correction positions defined by four eyebox corners and one eyebox center within a two-dimensional eyebox (E) oriented perpendicularly to the beam propagation. Claim 6 A method for operating a field of view display device (2), wherein the field of view display device (2) further comprises an imaging and / or projection optical device arranged and formed within the beam path of a beam of light (L) generated by an image generator (6), such that a beam of light (L) is projected onto a reflective disk (3) in a predetermined shape and direction, so as to be reflected to the user's eye by a reflective disk (3) and thereby display the display content to the user as a floating real image or virtual image (R, V). Claim 7 A control unit (8) formed and designed to automatically execute a method according to any one of paragraphs 1 through 6. Claim 8 A projection unit (5) for a field of view display device (2) for use in particular in a vehicle (1), comprising: an image generator (6) designed to generate a beam of light (L) having desired display content; a control unit (8) according to claim 7 designed to control the image generator (6) to execute a method according to any one of claims 1 to 6; and an imaging and / or projection optical device arranged and formed within the beam path of the beam of light (L) generated by the image generator (6), wherein, if necessary, the beam of light (L) is reflected to the user's eye by a reflective disc (3) arranged within the user's field of view after leaving the projection unit (5) in a predetermined shape and direction, thereby showing the display content to the user as a floating real or virtual image (R, V). Claim 9 A field of view display device (2) for a vehicle (1), in particular, comprising: a projection unit (5) according to claim 8; and a reflective disc (3) arranged and formed within the field of view of a user and arranged within the beam path of a beam of light (L) output by the projection unit (5), such that by reflecting a beam of light (L) to a predetermined eye box (E) for the user's eye, the display content can be seen by the user as a floating real or virtual image (R, V). Claim 10 A vehicle (1), particularly an automobile, having longitudinal, transverse, and vertical directions perpendicular to each other in a fixed orthogonal coordinate system, comprising: a cabin having vehicle glass, particularly a windshield (3), that at least partially defines the cabin; and a visual display device (2) according to claim 9, wherein the projection unit (5) of the visual display device is arranged within the cabin, particularly within an instrument panel (4) arranged below the windshield (3), and the reflective disc of the visual display device is formed as a section of the vehicle glass or as a combiner disc arranged within the cabin.

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