• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A display (100) having a display unit (110) having a first range (202) for a first radius (210) of a first left partial image, a second range (204) for outputting a second radius (212) d a first right partial image, a third emission range (206) for a third ray (214) representing a second left partial image and a fourth range (208) for emitting a fourth ray (216) of a second partial image right. A first optical element (218) in the path of the first (210) and the second light beam (212) directs the first (210) in a first direction associated with the left eye and the second (212) in a second associated direction. in the right eye, a second optical element (220) similar to the first.
    公开号:FR3034531A1
    申请号:FR1652774
    申请日:2016-03-31
    公开日:2016-10-07
    发明作者:Thomas Buergstein；Julian Hauss
    申请人:Robert Bosch GmbH；
    IPC主号:
    专利说明:

    [0001] FIELD OF THE INVENTION The present invention relates to a self-stereoscopic head-up display applied to a vehicle and a method for generating an auto-stereoscopic image by the vehicle head-up display. STATE OF THE ART The usual auto-stereoscopic displays comprise a lens frame or a barrier mask for directing the partial images necessary for the representation of an auto-stereoscopic image, that is to say of a three-dimensional image towards the image. left eye and the right eye of the observer. WO 2008011888 A1 describes for example a method for displaying auto-stereoscopic images on a computer screen.
    [0002] In addition, vehicle head-up displays with bidirectional images projected in the driver's field of view are known. DESCRIPTION AND ADVANTAGES OF THE INVENTION In this context, the subject of the present invention is an auto-stereoscopic head-up display for a vehicle, characterized in that it comprises a display unit having a first transmission range for transmitting a first light beam representing a first left partial image, a second transmission range for emitting a second light beam representing a first right partial image, a third transmission range for emitting a third light beam representing a second left partial image and a fourth transmission range for emitting a fourth light beam representing a second right partial image, a first optical element installed in the path of the first light beam and the second light beam spaced apart from the display unit and formed to direct the first ray luminous in a first direction associated with the left eye of the observer and the second ray it is illuminated in a second direction different from the first direction, but associated with the right eye of the observer; a second optical element installed in the path of the third light beam and the fourth light beam 3034531 2 away from the display unit and to direct it in a third direction different from the first and second direction and a fourth light beam associated at right hand and to direct it in a fourth direction different from the first and second and third directions and at least one deflection element for deflecting the light beam emitted by the first optical element and / or the second optical element in a viewing range of the observer. The vehicle concerned by the invention is for example a passenger vehicle or a commercial vehicle. The head-up display is fo a display device in the field of view or a display unit having a display, in particular an LCD display. The display unit can be integrated into the vehicle dashboard or be an image generating unit, which can be integrated therein. The image generating unit has a light source for the backlighting of the display unit. The transmission range is a range of pixels with a predefined horizontal image resolution. For example, the transmission ranges can be juxtaposed alternately for the left and right hands. The partial image according to the invention is a stereoscopic half-image. The simultaneous perception of the left partial image by the left-hand and the right-hand partial image by the right-hand geometry, for the observer, of the impression of a three-dimensional image (raised image). The optical element according to the invention is for example a mirror, a lens or a hologram generating a three-dimensional image by angular division of the image components generated by the display unit. To deflect portions of images in two different directions, one can have an element divided by two or having an appropriate curvature. The light rays associated with the first and second directions form a first cone of vision in which the observer can perceive the visual image generated by the first partial images. Correspondingly, the light beams associated with the third and fourth directions form a second cone of vision different from the first cone and in which the observer can perceive the virtual image generated by the second partial images.
    [0003] A deflection element such as for example a mirror, a lens or a hologram, reflects the light rays emitted by the first or the second optical element through a cover glass installed in the dashboard on the windshield of the vehicle. vehicle. At least one deflector deflects the light beam by more than 90 °. The return elements are part of the optics of the head-up display. The windshield may be a part of this optical system. In addition, the deflection element enlarges the partial images emitted by the transmission areas.
    [0004] The range of vision also called "eye box" is a range in the passenger compartment of the vehicle in which the eyes of the observer must be located so that they can correctly perceive the images produced by the head-up display or at least to see these images.
    [0005] The proposal according to the invention is based on the consideration that the use of two separate optical elements of the display unit and which are spaced apart, makes it possible to generate two cones of vision oriented in different directions in the display. auto-stereoscopic head-up and within these cones, the observer will perceive the 20 pairs of partial images emitted by the display unit as a three-dimensional virtual image. The reduced number of cones of vision and thus partial images separated at the level of the optical elements makes it possible to reduce or avoid the defects of representation by crosstalk.
    [0006] Advantageously, the head-up display requires only reduced additional means by modifying the optical design of the usual head-up display with two-dimensional display. In particular, the physical separation of the optical elements of the display unit and the use of large components as optical elements simplifies the industrial manufacture of head-up displays, auto-stereoscopic. This results in less waste because the optical elements in case of defects can be simply replaced by the replacement of the display unit. It is also possible to envisage a combination of the optical elements with other displays, such as, for example, the display 3034531 4 MEMS or by backprojection, since the displays have a real or virtual image plane. According to another development, the width of the first emission range and / or the width of the second emission range substantially correspond to the half-width of the first optical element. In addition or alternatively, the width of the third transmission range and / or that of the fourth transmission range substantially correspond to the half-width of the second optical element. The width of the first optical element may correspond substantially to that of the second optical element. The width of the transmission ranges still called "step" is the horizontal resolution of the image in a separate transmission range. This embodiment allows an angular distribution to the pixel accuracy of the respective partial image pairs. According to another development, the distance between the first optical element and the first transmission range and the second transmission range is fixed and in addition or alternatively the distance between the second optical element and the third transmission range. and the fourth transmission range depending on the distance between the observer and the windshield of the vehicle. In addition or alternatively, the distance can be set according to the magnification coefficient to enlarge the contents of the first and / or the second partial image. This allows a simple adaptation of the head-up display to different types of vehicles and different dimensions of representation. According to another advantageous characteristic, the ratio between the distance and the width of the emission ranges and the opening angle between the first and second directions and / or between the third and fourth directions is fixed in practice by the This equation allows a simple and controlled orientation of the optical elements so that the light rays are oriented as precisely as possible in the respectively associated direction and thus directed to the corresponding element. of the observer.
    [0007] According to the embodiment, the optical element is a mirror, a lens or a hologram. In addition or alternatively, the second optical element is a mirror, a lens or a hologram. Such optical elements are robust, simple to handle and economical to manufacture. It is also advantageous for the first optical element to be movable to modify the first and the second direction as a function of the movement of the observer's head. In addition or alternatively, the second optical element is also movable to modify the third and fourth directions depending on the movement of the observer's head. This makes it possible to enslave the virtual image generated by the light rays to the movements of the head to thus enlarge the effective range of vision of the observer. The first optical element in the form of a hologram can have a variable structure for modifying the first and the second direction according to the movement of the head of the observer or to modify the dimension of the virtual image generated by the first partial image. Alternatively or additionally, the hologram which constitutes the second optical element has a variable structure for modifying the third and fourth direction depending on the movement of the observer's head, or for modifying the size of the virtual image generated with the second partial images. This embodiment makes it possible to further improve the quality of the representation in the head-up display. In addition, the head-up display may have an additional return element for deflecting the light beam emitted by the display unit to the first optical element and / or the second optical element. The additional deflector element is for example an additional mirror or an additional light guide. This allows a flexible adaptation of the corresponding paths of the light beams to be adapted to the space available in the vehicle for the head-up display. In another development, the head-up display has a fifth transmission range for emitting a fifth light beam representing a third left partial image and a sixth transmission range for emitting a sixth light beam 3034531 having a third right image. A third optical element is installed in the path of the fifth light beam and the sixth light beam away from the display unit to deflect the fifth light beam in a fifth direction different from the first, second, third and from the fourth direction and which is associated with the left hand and to deflect the sixth light ray in a sixth direction different from the first, second, third, fourth and fifth directions and which is associated with Fceil law. The deflection or deflection element directs the light beam emitted by the third optical element according to the range of vision. Thus, the fifth and the sixth direction will form a third cone of vision. The observer will be able to see the three-dimensional image in three cones of different visions, which further increases the visibility range of the observer.
    [0008] According to another advantageous characteristic, the subject of the invention is a method for generating an auto-stereoscopic image by means of a head-up display consisting in emitting the first light ray, the second light ray, the third light ray and the fourth light ray, directing the first light ray of the first direction, the second light ray in the second direction, the third light ray in the third direction and the fourth light ray in the fourth direction, and deflecting the first light ray light ray, the second light ray, the third light ray and / or the fourth light ray in the viewing range.
    [0009] The present invention will be described in more detail below with reference to an exemplary embodiment of an auto-stereoscopic head-up display shown in the accompanying drawings, in which: FIG. 1 is a diagram of an exemplary embodiment of a head-up display, FIG. 2 is a diagram of the light-beam pattern of the head-up display in the embodiment, FIG. 3 is another diagram. light rays in the exemplary embodiment of the head-up display, FIG. 4 is a diagram of the light rays in the head-up display of FIG. 1 in plan view, and FIG. very simplified a method for generating an auto-stereoscopic image using a head-up display in the embodiment of the invention. DESCRIPTION OF AN EMBODIMENT FIG. 1 schematically shows a head-up display 100 according to an exemplary embodiment. The head-up display 100 includes an image generating unit 102 with a light source 104 and a display unit 106 backlit by the light source 104. The figure is a diagram of the optical design of the light source 104. head-up display 100 with an LCD display as the display unit 106. The display unit 106 emits a main beam 107 composed of parts of an auto-stereoscopic image. Beyond the image generating unit 102, an optical installation 108 directs the main beam 107 in different directions on a deflection element 110 made for example in the form of a curved mirror. The directions each correspond to the position of the left hand and the right hand in the viewing range 112, also called the "eye box" 20 allowing an observer to see the auto-stereoscopic image. Starting from the deflection element 110, the main beam 107 is sent through a cover glass 114 on the windshield 116 which reflects the beam in the viewing range 112. The optical installation 108 divides the main beam 107 into two partial beams of different orientations oriented relative to each other so that the left-hand image portions arrive at the left-hand side and the right-end image portions arrive at the right eye. The observer thus perceives the two image parts as a single three-dimensional image.
    [0010] According to the embodiment, the optical installation 108 comprises as optical element at least one lens, a mirror or a hologram. These elements are used to generate one or more vision cones for the three-dimensional representation of the virtual image. The deflection element 110 makes it possible to drive the vision cones through the optical volume of the head-up display 100.
    [0011] The optical installation 108 makes it possible to modify the optical path through the lenses and the mirror of the head-up display 100 so that the two eyes of the observer see the display of different images. In order to divide the image portions angularly, the elements of the optical installation 108 can be divided by at least two as will be described hereinafter. FIG. 2 is a schematic representation of the light rays in the head-up display 100 according to the exemplary embodiment such as the head-up display of FIG. 1. The display unit 106 of the automatic 3D display stereoscopic 100 shown in Figure 2 comprises four emitting zones 202, 204, 206, 208 juxtaposed, also called image ranges. A first transmission range 202 allows the transmission of a first left image portion represented by the first light beam 210, a second transmission range 204 corresponds to the transmission of a first portion of right image representing the second light beam 212; a third transmission range 206 for transmitting a second left image portion is represented by the third light beam 214 and a fourth transmission range 208 corresponds to the emission of a fourth light beam 216 re- 20 showing the second right image part. The four transmission ranges make it possible to display the image content of four different alternating ranges for the left and right hands on the display unit 106. The optical installation 108 carries two optical elements 21, 21, 220 which are located at a predetermined distance from the display unit 106. A first optical element 218 is in the respective path of the two light beams 210, 212 and a second optical element 220 is in the respective path of the two light beams 214, 216. The two optical elements 218, 220 are only exemplified in the corresponding transmission ranges of the display unit 106. In reality, the light beams can also be guided by an additional return element, for example in the form of a mirror or other suitable reflector, by the four transmission areas to the respective optical element.
    [0012] The two optical elements 218, 220 have the function of guiding the light rays emitted by the respective emission ranges in the viewing range 112 so that the light beams 210, 214 representing the two left partial images are perceived by 5 Fc. left of the observer and that the light beams 204, 208 representing the two parts of the right image are perceived by the right eye of the observer. The optical concept of the head-up display 100, which consists at least of the optical installation 108 and the deflection element 110, forms the image of the four image ranges 202, 204, 206, 208 so that they reach the appropriate position in the viewing range 112, i.e. so that the respective left-hand image areas arrive in the left half of the viewing range 112 and the image ranges for In fact, the display unit 106 may be significantly smaller than the viewing range 112 generated so that the image contents presented by the display unit 112 are in the right half 15 of the viewing range 112. display unit 106 will be expanded appropriately. According to the embodiment, the enlargement will be done for example by the optical installation 108 itself or by the deflection element 110. As already shown schematically in FIG. 1, the light rays 210, 212, 214, 216 are reflected by the windshield of the vehicle to give the observer the impression that the object represented is in front of the windshield.
    [0013] In addition, the image contents will be modified by a distortion precorrection so that the observer receives a three-dimensional image without distortion. The number of optical elements for generating the three-dimensional image content makes it possible to influence the quality of the image perceived by the observer, for example with respect to the size of the viewing range 112 or handle crosstalk This last effect can be influenced, for example, by appropriate compensation of the crosstalk, at least by decreasing the number of pixels directly concerned by the number of optical elements.
    [0014] The practical design of the head-up display 100 can be adapted to vehicle characteristics such as space and reflection as well as to meet certain image requirements such as the distance to be respected or the 3D effect. .
    [0015] Fig. 3 is a schematic representation of the light rays in the head-up display 100 of Fig. 2 according to the exemplary embodiment. FIG. 3 shows the general relationship of the separating optical elements 218, 220 here constituted by two lenses, with respect to the representation in the viewing range 112. To clarify the explanations, FIG. 3 only shows the paths of the light rays 214, 216 issued by the two emission ranges 206, 208. The following description also relates correspondingly to the path of the light rays emitted by the two other transmission ranges 202, 204.
    [0016] According to this exemplary embodiment, the second optical element 220 places the direction of the incident light ray 214 coming from the direction of the third emission range 206 to orient it at the output in the direction associated with the left hand. Similarly, the second optical element 220 breaks the direction of the light beam 216 arriving 20 from the fourth emission range 208 so that at the exit, the beam is oriented in the direction of the right eye. By applying the opening angle (a) between the two emitted light beams 214, 216 there will be a distance between the two eyes of the observer. In other words, the optical separator element 220 downstream of the display unit 106 divides the original image emitted by one of the two transmission ranges 206, 208 into two images, one for the left hand and the other for the right hand. FIG. 3 shows that the respective emission range width (p) 206, 208 corresponds substantially to a half-width of the element 220 generating the 3D effect. The width (p) is defined for example by the respective step of the partial image of the emission range. This distance in pixels can also be calculated directly from the distance x between the display unit 106 and the optical element 220 which separates it from the latter as well as the opening angle (a). The aperture angle (a) thus results from the position of the observer and the necessary enlargement of the image content. Between the width (p), the distance x and the opening angle (a) we have the following relation: p = 2.x.tan (oc 2/5 Typically, the observer is at a distance d At this distance, the image contents generated by the display unit 100 are usually magnified five times, resulting in a distance x of about 80 mm and an angle θ. aperture (a) of about 10 degrees, thus the application of the equation above gives a step (p) of the partial image equal to 14 mm. not the optical element 220 which is 28 mm Thus, the display unit 106 according to the embodiment of Figure 3 has 15 for partial images of identical pitch, a width of 56 mm for a step current pixels of 85 μm corresponding to a horizontal resolution of 660 px The distance x may vary depending on the position of the display unit 106, for example when the display unit 106 is replaced by 20 by a display unit having other dimensions or another horizontal resolution of the image. In particular, the use of larger display as the display unit 106 increases the size of the display 100 to avoid the overlap of the light rays. In addition, the inclination angle of the optical elements 218, 220 may be increased relative to the display area of the display unit 106 composed of the four transmission ranges. The optical element 220 may be made for example by modifying a mirror located in the position of the optical installation 108 according to Figure 1 and corresponding to a conventional head-up display. Alternatively, it is also possible to make a mirror functioning as a deflector element 110 or separator to ensure the function of the optical elements 218, 220. The light rays emitted by the display unit 106 may be directed to the mirror by the element additional referral.
    [0017] In addition to the four emission ranges mentioned above, the head-up display 100 may also have a fifth display range for emitting a fifth light beam representing a third left-hand partial image and a sixth transmission-range. to emit a sixth light ray representing a third right partial image. Correspondingly, the head-up display 100 may comprise a third optical element installed in the path of the fifth and sixth light rays being separated from the display unit 106 and which serves as described above, in an analogous manner. 10 logue to the example of the second optical element 220 to direct the fifth light beam in the direction associated with the left eye and the sixth light ray in the direction associated with the right eye. Fig. 4 schematically shows a top view of the light rays in the head-up display 100 of Fig. 1. In the figure, the image generating unit 102 is shown together with the light source 104 and the unit. 106, the optical installation 108 and the return element 110. For simplicity, the light rays are described again as an example for the two light beams 214, 216. The optical installation 108 is schematically a This divider has two reflective surfaces which are differently oriented and function as a separator. The image generated by the two display units 106 and in the form of two light rays 214, 216 first arrives at the optical installation 108. This reflects the two light rays 214, 216 on the screen. Referring element 110 in the form of a mirror or the windshield and from there the rays are finally deflected into the viewing range of the observer. For better recognition, the three levels of reflection are represented in different drawings. When, for example, the light beam 214 representing the left-side image arrives on the wrong side of the separator, by adjusting the angle or the curvature of the separator, the light ray will no longer arrive on the wrong side of the separator. observer. In addition, the appropriate choice of dimensions of the second mirror in the form of the deflection element 110 reduces crosstalk.
    [0018] For simplicity, the separator is shown without curvature. In reality, the separator can also be curved. The limitation of the representation of FIG. 4 to only two transmission ranges is provided as already indicated to clarify the presentation. According to an exemplary embodiment, the optical elements of the optical installation 108 are movable, which makes it possible to modify the path of the respective light beam by the appropriate displacement of the optical elements, such as by inclination of a mirror, a 10 movement of the observer's head. To capture the movement of the head or the position of the observer, the head-up display 100 includes a system for tracking the movement of the head. One can also consider using a hologram as an optical element; the hologram then performs the function of a lens or a mirror. The hologram may have a variable structure to ensure, as appropriate, different optical functions. In particular, by modifying the structure of the hologram the direction or the number of light rays is modified so that the observer will perceive another image. This makes it possible to adjust, for example, the enlargement of the virtual image or the slaving of the virtual image. An optical element in the form of a variable hologram has the advantage of avoiding any mechanical servocontrol. Figure 5 is a very simplified diagram of a method 500 for generating an auto-stereoscopic image using a head-up display according to an exemplary embodiment of the invention. The method 500 may be executed for example in connection with a head-up display such as that described with reference to FIGS. 1 to 4. To generate the auto-stereoscopic image, in step 510 a first light beam, a light beam, is emitted. second light beam, a third light beam and a fourth light beam using the corresponding transmission ranges of the display unit. The light rays each represent a partial image associated with the left eye or the right eye. These partial images perceived simultaneously by the observer give the auto-stereoscopic image. In another step 520, using the first optical element, the first light beam is directed in the first direction associated with the left hand and the second light beam in the direction associated with the right hand. Further, in step 520, the second optical element directs the third light beam in a third direction associated with the left eye and the fourth light beam in a fourth direction associated with the right eye. Finally, the light rays are deflected in step 530 by means of a suitable deflection element such as a mirror or lens to arrive in the observer's viewing range. According to the optical design, which often depends on the space available, step 530 can be executed several times or before step 520. The observer will perceive the two pairs of partial images each time as an image. three-dimensional. As the pairs of partial images are directed into the observer's eyes in different directions, there are two vision cones in all, in which the observer can see the images in three dimensions.
    [0019] 15 3034531 15 NOMENCLATURE OF MAIN ELEMENTS 100 Head-up display 102 Image-generating unit 5 104 Light source 106 Backlit display unit 107 Main beam / main beam 108 Optical setup 110 Cross-over element 10 112 Vision range / eyepiece box 114 Cover glass 116 Windshield 200, 204 Emission range 204 Second emission range 15 206 Third emission range 208 Fourth emission range 210 First light beam 212 Second light beam 214 Third light beam 20 216 Fourth light beam light 218, 220 Optical elements 220 Separator optical element 500 Process for generating an auto-stereoscopic image of a head-up display 510, 520, Process steps 530 aperture angle p width x distance 30 35
    权利要求:
    Claims (2)
    [0001]
    CLAIMS 1 °) Auto-stereoscopic head-up display (100) for a vehicle characterized in that it comprises - a display unit (106) having a first emission range (202) for emitting a first light beam (210) representing a first left partial image, a second transmission range (204) for emitting a second light beam (212) representing a first right partial image, a third transmission area (206) for emitting a third light beam (214) representing a second left partial image and a fourth emission range (208) for emitting a fourth light beam (216) representing a second right partial image, - a first optical element (218) installed in the path of the first light beam (210) and the second light beam (212) spaced apart from the display unit (106) and directing the first light beam (210) in a first direction associated with the left eye of the observer and the econd light ray (212) in a second direction, different from the first direction, but associated with the right eye of the observer, - a second optical element (220) installed in the path of the third light ray (214) and the fourth ray light (216) spaced apart from the display unit (106) to direct it in a third direction, different from the first and second directions, and a fourth light beam (216) associated with the right hand to direct it in a fourth direction different from the first and second and third directions, and - at least one deflection element (110) for deflecting the light beam (202, 204, 206, 208) emitted by the first optical element (218 and / or the second optical element (220) in a viewing range (112) of the observer.
    [0002]
    2 °) head-up display (100) according to claim 1, characterized in that 3034531 17 the width (p) of the first emission range (202) and / or the width (p) of the second transmission range (204) substantially correspond to the half-width of the first optical element (218) and / or the width (p) of the third emission range (206) and / or the width (p) of the fourth range of emission (208) correspond substantially to half of the width of the second optical element (220), the width (p) of the first optical element (218) essentially corresponding to the width (p) of the second optical element (220). 220). 3) head-up display (100) according to claim 1, characterized in that the distance (x) between the first optical element (218) and the first transmission range (202) and with respect to the second range of emission (204) and / or the distance (x) between the second optical element (220) with respect to the first transmission range (206) and the fourth transmission range (208) is set according to the distance between the observer and the windshield of the vehicle and / or according to an enlargement coefficient for enlarging the image content of the first and / or the second partial image. 4 °) head-up display (100) according to claims 2 and 3, characterized in that the ratio between the distance (x) and the width (p) of the emission ranges (202, 204, 206, 208) and the opening angle (a) between the first and the second directions and / or between the third and fourth directions is set substantially by the following equation: p = 2.x.tan a 2, 30 Head-up display (100) according to claim 1, characterized in that the first optical element (218) and / or the second optical element (220) are a mirror and / or a lens and / or a hologram. 6 °) head-up display (100) according to claim 1, characterized in that the first optical element (218) is movable to modify the first and second directions according to the movement of the head of the observer and / or the second optical element (220) is movable to modify the third and fourth directions depending on the movement of the head of the observer. 7 °) head-up display (100) according to claim 5, characterized in that the first optical element (218) has the shape of a hologram with a variable structure for modifying the first and second directions according to the movement of the head of the observer and / or the size of the virtual image generated with the first partial images and / or the second optical element (220) in the form of a hologram has a variable structure for modifying the third and the fourth directions depending on the movement of the observer's head and / or the size of the virtual image generated by the second partial images. 8 °) head-up display (100) according to claim 1, characterized in that it comprises an additional deflector element for deflecting the light beam (202, 204, 206, 208) emitted by the unit d display (106) on the first optical element (218) and / or the second optical element (220). 9 °) head-up display (100) according to claim 1, characterized in that the display unit (106) has at least a fifth emission range 30 for emitting a fifth light beam representing a third left partial image and a sixth transmission range for emitting a sixth light beam representing a third right partial image, a third optical element being placed in the path of the fifth light beam and the sixth light beam, remote from the display unit (106). ) to direct the fifth light ray in a third direction associated with the left hand and which is different from the first, second, third, and fourth directions and the sixth light ray in a sixth direction associated with the right hand and which is different from the first, second, third, fifth and fifth directions, the deflection element (110) t further the light beam emitted by the third optical element in the viewing range (112). Method (500) for generating an auto-stereoscopic image using a head-up display (100) according to any one of claims 1 to 9, and comprising the following steps: transmitting (510) the first light beam (210), the second light beam (212), the third light beam (214) and the fourth light beam (216), directing (520) the first light beam (210) of the first direction, the second light ray (212) in the second direction, the third light ray (214) in the third direction and the fourth light ray (216) in the fourth direction, and deflecting (530) the first light ray (210), the second light beam (212), the third light beam (214) and / or the fourth light beam (216) in the viewing range (112). 25
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    同族专利:
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    引用文献:
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    申请号 | 申请日 | 专利标题
    DE102015206001.2A|DE102015206001A1|2015-04-02|2015-04-02|Autostereoscopic head-up display for a vehicle and method for generating an autostereoscopic image by means of a head-up display for a vehicle|
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