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    • 专利摘要:
    A method of adapting the presentation of an autostereoscopic display (102) for a vehicle (100), comprising recording a first observation position (112) of a first observer (110) and at least a second observation position ( 116) of a second observer (114), to determine (1674) a first range of viewing angles (118) and a second range of viewing angles (120) as well as a set of angles ranges of view (118, 120, 540) using the first and second viewing positions (112, 116), and providing (1676) a control signal of a layer (106) controlling the three-dimensional effect of the auto-stereoscopic display (102).
    公开号:FR3019318A1
    申请号:FR1552423
    申请日:2015-03-24
    公开日:2015-10-02
    发明作者:Thomas Buergstein
    申请人:Robert Bosch GmbH；
    IPC主号:
    专利说明:

    [0001] Field of the invention The present invention relates to a method of adapting the presentation of an auto-stereoscopic vehicle display and a device for adapting the presentation of the auto-stereoscopic display for a vehicle and a program. corresponding computer. STATE OF THE ART Screens displaying three-dimensional images, also called auto-stereoscopic screens, can also be partially switched to display two-dimensional contents. For example, WO 2008 062592 A1 discloses a corresponding display control apparatus and an integrated display for a vehicle. US 2010 0060983 A1 discloses an auto-stereoscopic image screen with parallax barriers. In place of the parallax barriers, other barrier techniques such as masks, LCDs, prism lenses are used. Thus, an auto-stereoscopic display may include, for a user, two ranges of viewing angles and a position determination (for example servo-control on the position of the head). Alternatively, an autoregular display may also have multiple viewing angle ranges for multiple viewing. Thus, in the case of a three-dimensional image-screen or auto-stereoscopic image-screen, it is possible to switch between two ranges of viewing angles for a single observer. This makes it possible for the observer who moves beyond the range of viewing angles to avoid the impression of a disturbed image. Thanks to this technique, the ranges of viewing angles are repeated periodically. OBJECT OF THE INVENTION In this context, the object of the present invention is to develop a method of adapting the presentation of an auto-stereoscopic vehicle display as well as a device for adapting the presentation of a vehicle. the auto-stereoscopic display of a vehicle and application of these methods, as well as a corresponding computer program. DISCLOSURE AND ADVANTAGES OF THE INVENTION Thus, the subject of the invention is a method for adapting the presentation of an auto-stereoscopic display for a vehicle, this method comprising the steps of recording a first observation position of a first observer and at least a second observation position of a second observer, determining a first range of viewing angles and at least a second range of viewing angles as well as a set of viewing angle ranges. by using the first observation position and the second observation position, the viewing angle ranges each representing an open cone from the display and providing a control signal of a layer controlling the three-dimensional effect Auto-stereoscopic display using all viewing angle ranges to adapt the presentation of the stereoscopic display. Knowing the position of at least two observers, it is possible to adapt the viewing angle ranges of a stereoscopic display so that at least two observers can always see a stereoscopic image. Advantageously, compared to previous solutions, there is a representation with less loss or a higher resolution. If a stereoscopic display combines two-dimensional and three-dimensional objects, the resolution and readability of the information will be increased.
    [0002] An observation position is the position of the observer's eyes of the auto-stereoscopic display. An observation position can be captured by the eye tracking method or the head. The auto-stereoscopic display can create a representation of three-dimensional images to have a sense of depth through stereoscopic vision. A set of viewing angle ranges can start from the auto-stereoscopic display. Thus, the light of the different pixels of the auto-stereoscopic display can be diverted in different directions towards the front of the screen and each eye can capture a different image. A range of viewing angles can be represented as a partial image. Thus, in a first range of viewing angles, a first partial image is represented and in a second range of viewing angles a second partial image is represented. Partial image ranges can be repeated periodically. Advantageously, the readability of the information appearing on the auto-stereoscopic display or the content of the image is improved.
    [0003] According to another characteristic, an adapted image content is provided by using all the ranges of viewing angles and / or by using the control signal and / or a signal derived therefrom and / or by using a content of original images.
    [0004] The content of the adapted image may be provided using the first range of viewing angles and in addition or alternatively, the second range of viewing angles. Conversely, it is possible to advantageously adapt all the ranges of viewing angles to the content of the image. According to an advantageous characteristic, in the determination step at least a third range of viewing angles is determined, in particular up to five ranges of angles of view, different from each other. Thus, in the determination step, a set of viewing angle ranges can be determined. In particular, one can determine at least five or seven ranges of viewing angles. In the third range of viewing angles, a third image can be represented. In five ranges of different angles of view, five different partial images can be represented, which makes it possible to represent different image contents for two observers.
    [0005] According to another advantageous characteristic, the control signal can be provided for the control layer of the three-dimensional effect of the auto-stereoscopic display. The layer that controls the three-dimensional effect may be a barrier layer and in particular a parallax barrier layer and in addition or alternatively, a lens optics. To achieve the auto-stereoscopic display, it is possible to use a parallax barrier or a lens frame. The parallax barrier is a band mask. In the provisioning step, the control signal may be the resolution of the layer controlling the three-dimensional effect and in addition or alternatively, information relating to the resolution of the layer controlling the three-dimensional effect. The control signal can thus control different partial ranges for the three-dimensional effect with different resolutions. Thus, the control signal can control partial regions of the layer that controls the three-dimensional effect to represent in this region an image content with a higher resolution in a two-dimensional form. Advantageously, the resolution of the layer controlling the three-dimensional effect is adapted to the content of the image. According to an advantageous characteristic, in the recording step a content of the original images is recorded and in the determination step, an original image content is used, at least a first partial range of the content is determined. original images that will be represented in two dimensions and at least a second partial range of the original image content that will be represented in three dimensions. In the provisioning step, the control signal, using the first partial range, and in addition or alternatively using the second partial range, may determine the content of the original image. The control signal can also be implemented to control a first partial range of the auto-stereoscopic display for a two-dimensional display and in addition or alternatively, a second partial range disjoint from the first partial range for a three-dimensional display. The first partial range of the original image content and the second partial range of the original image content may be disjointed ranges.
    [0006] According to one development, in the provisioning step, the control signal represents the width and in addition or alternatively, the position or in addition and alternatively the offset of a set of holes in the layer controlling the effect. three-dimensional auto-stereoscopic display.
    [0007] The control signal may represent the lateral position or in addition or alternatively, a lateral shift of the layer controlling the three-dimensional effect for the image generator of the auto-stereoscopic display and in addition or alternatively the distance of the layer controlling the three-dimensional effect with respect to the image generator. The control signal may include information relating to the lateral position or, in addition or alternatively, information relating to the lateral shift of the layer controlling the three-dimensional effect with respect to the image generator of the auto-stereoscopic display. and in addition or alternatively, information relating to the distance between the layer controlling the three-dimensional effect and the image generator. Advantageously, according to a development of the invention, there is a combination of a three-dimensional display (3D display) with a dual display or a multi-view display. The dynamic adaptation of the barrier characteristic of this case, will be according to the actual position of the head by the method of tracking the head in the variants with a lateral mechanical shift and a switching of the structures of the mask in optical valve technique , as for example for LCD. Beside the lateral adaptation of the barrier to the position of the head, it is also possible to vary the distance between the barrier and the display matrix. Advantageously, this allows a disposition with less losses for the barrier matrix. The invention also relates to a device for executing the steps of the method of adapting the presentation of the auto-stereoscopic display to a vehicle and corresponding facilities for carrying out the method. This variant of the invention in the form of a device makes it possible to solve the problem of the invention quickly and efficiently.
    [0008] The device is, for example, an electrical apparatus which processes sensor signals and, depending on these, generates control signals and / or data signals. The device comprises an interface in the form of a program and / or a circuit. In the case of an embodiment in the form of a circuit, the interfaces are for example part of an ASIC system which contains various functions of the device. It is also possible that the interface has integrated circuits of its own or that the interface is at least partly made by discrete components. In the case of a realization in the form of a program, the interface or interfaces are program modules which are, for example, in a miro-controller next to other program modules. The subject of the invention is also advantageously a computer program product or a computer program with a program code recorded on a support readable by a machine or a memory medium such as a semiconductor memory, a hard disk or optical memory for the implementation and application of the process steps as developed above, especially when the program product or the program are executed by a computer or a computer.
    [0009] Drawings The present invention will be described hereinafter in more detail with the aid of an exemplary method of adapting the presentation of an auto-stereoscopic vehicle display, shown in the accompanying drawings in which the same elements are shown. the same numerical references. Thus: FIG. 1 is a diagram of a vehicle with an auto-stereoscopic display and a device for adapting the presentation of the auto-stereoscopic display according to an exemplary embodiment of the present invention, FIG. 2 is a representation schematic of an auto-stereoscopic vehicle display with a device for adapting the presentation of the auto-stereoscopic display according to an exemplary embodiment of the present invention, Figure 3 is a schematic representation in barrier technique of an auto display FIG. 4 is a schematic representation of an auto-stereoscopic display with ranges of angles of view which are repeated periodically according to an exemplary embodiment of the present invention. 5 is a schematic representation of an auto-stereoscopic display with ten ranges of different viewing angles. FIG. 6 is a diagrammatic representation of an auto-stereoscopic display with a small range of viewing angles, according to an embodiment of the present invention, according to an exemplary embodiment of the present invention, FIG. 7 is a schematic representation of an auto-stereoscopic display with observer-wide viewing angle ranges according to an exemplary embodiment of the present invention; FIGS. 8-11 are diagrammatic representations of a display; for two observers and a number and orientation of observer-dependent ranges of viewing angles according to an exemplary embodiment of the invention, Fig. 12 is a representation of an auto-stereoscopic display with a partial range with two-dimensional representation of the content of the image and a three-dimensional partial range, disjointed from the previous one, for the content of images In an exemplary embodiment of the present invention, FIG. 13 is a schematic representation of an auto-stereoscopic barrier display according to an exemplary embodiment of the present invention, FIG. 14 is a diagrammatic representation of a display in FIG. to-stereoscopic barrier technique with a partial representation in 2D according to an exemplary embodiment of the present invention, Figure 15 is a graphical representation of the image parameters as a function of the useful angle of a direction of view and a viewing angle according to an exemplary embodiment of the present invention, and FIG. 16 shows a very simplified flow chart of a method of adapting the presentation of the auto-stereoscopic display of a vehicle according to a Embodiment of the present invention Description of Embodiments FIG. 1 is a schematic representation of a vehicle 100 equipped with an affine Auto-stereoscopic hatch 102 comprising a device 104 for adapting the presentation of the stereoscopic display 102 according to an exemplary embodiment of the present invention. The auto-stereoscopic display 102 comprises a three-dimensional control layer 106 and an image generator installation 108. The auto-stereoscopic display 102 of the illustrated embodiment is inputted by a first observer 110 into a first observation position 112 and for at least a second observer 114 in at least a second observation position 116 as well as for a first range of viewing angles 118 and at least a second range of view angles 120 as a set of viewing angle ranges 118, 120 using the first viewing position 112 and at least the second viewing position 116. The viewing angle ranges 118, 120 represent each Once a cone is opened from the display 102. The device 104 generates a control signal to control at least the layer 106 controlling the three-dimensional effect of the auto-stereoscopic display 102 by using the set of ranges of a. View Nodes 118, 120, to Adapt the Presentation of the Auto-Stereoscopic Display 102. In the case of a three-dimensional presentation, especially for that based on space, such as for example an auto-stereoscopic image screen, the resolution of the screen-image decreases considerably because of the use of the third dimension. This can result in objects that are not clear and also in the crosstalk between the different areas of observation. One aspect of the invention relates to the simultaneous representation of objects in two or three dimensions. It is possible to increase the resolution and readability of the information. Unlike known displays, it is not the entire content of the image that is displayed, in two, or in three dimensions, but only corresponding partial regions. Advantageously, when the observer enters the representation, the annoyance caused by noncharged objects or by crosstalk between the observation zones is avoided. FIG. 2 is a schematic representation of an auto-stereoscopic display 102 for a vehicle equipped with a device 104 for adapting the presentation of the auto-stereoscopic display 102 according to an exemplary embodiment of the present invention. The autostereoscopic display 102 may be an exemplary embodiment of the auto-stereoscopic display 102 of FIG. 1. The auto-stereoscopic display 102 includes a layer 106 which controls the three-dimensional effect, a generation facility. image 108 as well as a device 104 for adapting the presentation of the auto-stereoscopic display 102. The device 104 includes an interface 224 for recording a first observation position of a first observer 110 and at least a second position observing a second observer 114, a determining facility 226 for determining a first range of viewing angles 118 and at least a second range of viewing angles 120 as well as a set of viewing angle ranges. 118, 120 using the first observation position and at least the second observation position; the viewing angle ranges 118, 120 are represented by cones opening from the display 102; a delivery facility 228 provides a control signal for controlling a control layer of the three-dimensional effect of the auto-stereoscopic display by applying a set of viewing angle ranges to adapt the presentation of the display. auto-stereoscopic display. Figure 2 shows in the exemplary embodiment, the delivery facility 228 which provides a suitable image content using a set of viewing angle ranges and original image content. Thus, the supply installation 228 includes a partial installation 230 for modifying the barrier as well as another partial installation 232 for modifying the content of the image. With the image interface 234, the content of the original image is provided or recorded.
    [0010] The first observation position recorded by the interface 224 for recording observation positions as well as the second observation position are provided in the embodiment shown in FIG. 2 by a head tracking system 236 (system enslavement of the head).
    [0011] In other words, Figure 2 shows a block diagram of the data processing. A presented aspect corresponds to a set of central sensor 236 for detecting the position of the observers 110, 114. After determining the position or the corresponding observation angle of the observers 110, 114, the number of tracks is first defined. angles of view 118, 120 necessary. For example in the barrier technique, the width of the openings in the barrier mask 106 will thus be the same. If necessary, it is also possible to calculate and apply the offset of the openings. Correspondingly, the data of the original images are adapted. This last point corresponds in the simplest case, to two images, one for the left and the other for the right. The association of pixels in the two-dimensional display behind the 3D layer will be calculated and then presented. The auto-stereoscopic display 102 developed here maximizes the resolution of the representation while avoiding a loss of quality by an "image jump" in the event of observer motion 110, 114. In the current three-dimensional presentations, especially those based on space, such as auto-stereoscopic image screens, the resolution of the image-screen decreases considerably because of the use of the third dimension. In particular, if one uses more than the two ranges of angles of view 118, 120 essential, as in the case of a multi-view display. Advantageously, the observer 110, 114 which captures the representation, improves it in that two ranges of viewing angles 118, 120 are used and the content is enslaved by the recognition of the position of the observer. 110, 114 (head tracking). Advantageously, the input of the representation by the observer 110, 114 is improved in that, in a limited range, two-dimensional contents are displayed. As a result, the auto-stereoscopic display 102 operates for several users including head tracking. For the aspect, the ranges of viewing angles 118, 120 (number, position) are varied as a function of the observation positions. Quality is improved by using 2D content in a targeted way. The idea concerns the use of the head tracking 236 for several observers 110, 114. In particular, two observers 110, 114 must have a very high quality impression thanks to the invention. In the automotive environment, the invention allows a three-dimensional representation for the driver and the passenger and whose quality is significantly improved compared to the state of the art. One aspect of the invention is in the targeted modification of the layer generating the three-dimensional effect and the consequent adaptation of the two-dimensional representation that is behind it. For this purpose, a minimum number of viewing angle ranges 118, 120 are used which are switched according to the position of the observer 110, 114. In the case of two observers 110, 114 as is necessary in the automotive environment, at least two ranges of viewing angles 118, 120 have to be switched to three viewing angle ranges (as will be shown in the following figures) to have a larger overall viewing range and also to switch to five ranges of viewing angles. 'angles of view. In the case of three observers 110, 114, in the application of the present idea it is necessary to be able to switch between seven ranges of viewing angles 118, 120. On the one hand, thanks to the application of the invention, it is possible to at the same time to enslave the content for several users 110, 114. In the automobile field, the passenger will thus also have, for example, a 3D representation, of high quality, defined for him. On the other hand, objects in two or three dimensions can be simultaneously represented by the display 102. The consequence is an increase in resolution and visibility. In particular, in the automotive field, there is thus a better representation, for example navigation content and less fatigue for the observer 110, 114. Moreover, there is no longer any need to distinguish between the mass of three-dimensional display information and the clarity of the two-dimensional display. Figure 3 is a schematic representation of a barrier technique for an auto-stereoscopic display 102 according to an exemplary embodiment of the invention. The auto-stereoscopic display 102 may be an exemplary embodiment of the auto-stereoscopic display 102 shown in FIG. 1 or in FIG. 2. The auto-stereoscopic display 102 comprises a layer 106 which controls the three-dimensional effect as well as that an installation generating images 108. The layer 106 which controls the three-dimensional effect is made in the form of a barrier 106. The image generator installation 108 comprises simple pixels which are switched alternately for the two directions of view. The pixel width is represented by the reference (p) and the opening in the barrier 106 is represented by the reference (h). The display 102 forms two alternating ranges of viewing angles 118, 120 and which are hereinafter also referred to as "viewing cone" 118, 120. The apertures (h) have a distance corresponding to the double pixel width (p ). The useful angle of viewing angle ranges 118, 120 is represented by or is described by the symbol (a). The image generator installation 108 and the barrier 106 are spaced apart by the distance (d). The two viewing angle ranges 118, 120 have an angular difference (6). Figure 3 shows an adjustment of the viewing angle by the example of the barrier technique. The simplest case of the barrier technique has been shown. Pixels are switched alternately for both viewing directions (red and yellow). The width of pixels is equal to (p), the openings in the barrier are equal to (h) and are separated from each other to form two cones of vision (2p) which alternate. For a simple calculation, we place the holes in the middle in front of the boundaries between the pixels, which gives the symmetry, that is to say that we have the same useful angle a = ar = ag. In addition, for the calculation, the angles have the same center, which is approximately true, especially if the distance between the barrier and the display is small compared to the distance of the observer. From the distance (d) between the display and the barrier, the useful angle of a direction of view (a) is calculated as follows: tan 13 = tan y - a = 13 - y = arctand - arctan L Angle of distance of the two cones of vision (6) leading to an optical crosstalk, that is to say the perception of the two images is thus the following: 6 = 2y = 2arctan v-h12 d The periodicity of the angle 0 is then the following: 0 = a + 6 = arctan + h. = + arctanhi2 d While the pixel size (p) and the distance (d) with respect to the barrier mask strongly influence the periodicity 0, the hole size (h) is not decisive here, as the diagrams show. On the other hand, the useful angle (a) is influenced by the three parameters. Depending on the observation position of the observer, there will be a switching of the viewing angle ranges. There will be a switching of the number of alternating viewing angle ranges, for example from two to three if the display 102 already has several ranges of viewing angles (for example 6), and the display 102 will be ordered differently. This corresponds for example to two ranges of viewing angles with a command according to ABABAB and for three ranges of viewing angles we will have a command according to ABCABC. Alternatively, there is a switching of the number of alternate viewing angle ranges if the angle of viewing angle ranges is to be adapted by a change in the distance (d) (distance between display and the barrier) and if in addition the holes of the barrier mask must be adapted, especially if the distance of the holes must be adapted.
    [0012] According to an exemplary embodiment, the angles of the viewing angle ranges are adapted by modifying (p) (number of sub-pixels connected by the viewing angle direction) and in addition the holes of the barrier mask are adapted, in particular the distance of the holes. While the first solution does not provide an improvement in the resolution, the latter proposal can be applied in a relatively simple manner or have a very high resolution display and a relatively simple variable barrier mask. In a similar way to the barrier technique, it is also possible to switch to the lens technique according to which the lens design is switched by changing the distance between the lens layer and the display and also by using a multi-display. -Views that switch the viewing angles ranges. However, this is done with the same requirements or the same disadvantages as in the barrier technique. Moreover, in the case of the lens technique, it is also pos- Bible to change the shape of the lenses, that is to say the focus and also the association of certain ranges of viewing angles, determined to some display areas by changing the lens radius or changing the lens extension. In the same way, it is also possible to neutralize certain areas or make them transparent when they get closer to the barrier mask. This can possibly be used to reduce any annoying crosstalk at the cost of brightness. Such proposals are for example possible with the aid of a special LC layer which is appropriately switched, ie in this case the liquid crystal forms the lens. Another possibility is to develop lens functions with variable holographic structures. Figures 4 to 11 show variants of an auto-stereoscopic display 102 according to an exemplary embodiment of the invention.
    [0013] The auto-stereoscopic display 102 may be an auto-stereoscopic display 102 such as that of the exemplary embodiment of FIGS. 1 to 3. The auto-stereoscopic display 102 comprises a layer 106 which controls the three-dimensional effect as well as a image generator installation 108. Two observers 110, 114 are in front of the display 102; a first observation position 112 is associated with the first observer 110 and a second observation position 116 is associated with the second observer 114. For a point of the display 102, the ranges of angles of view 118, 120 from this point.
    [0014] FIG. 4 shows a periodic repetition of the viewing angle ranges 118, 120. The two observers 110, 114 have a neighboring, direct observation position 112, 116. FIG. 5 is a diagrammatic representation of an automatic display. stereoscopic 102 having ten ranges of angles of view 118, 120, 540 different from each other and which correspond to an embodiment of the present invention. In FIG. 5 there is a third range of viewing angles 540a, a fourth range of viewing angles 540b, a fifth range of viewing angles 540c, a sixth viewing angle range 540d, a seventh range of viewing angles. 540th viewing angles, an eighth range of viewing angles 540f, a ninth range of viewing angles 540g and a tenth range of viewing angles 540h. The left eye of the first observer 110 is in the first range of viewing angles 118; the right eye of the first observer 110 is in the second range of viewing angles 120. The left eye of the second observer 114 is in the fifth range of viewing angles 540c and the right eye of the second observer 114 is in a fifth range of viewing angles 540b. A range of viewing angles 540d is free between the two observers 110, 114. FIG. 6 is a schematic representation of an auto-stereoscopic display 102 with little range of viewing angles 118, 120, 540 by observer 110, 114 corresponding to an exemplary embodiment of the present invention. The two observers 110, 114 have a directly adjacent position. The multi-view display shown in Figure 6 is made for four observers 110, 114 to present to each a different representation. In contrast to FIG. 6, FIG. 7 is a schematic representation of an auto-stereoscopic display 102 having ranges of viewing angles 118, 120, 540 enlarged for each observer 110, 114 according to an exemplary embodiment of the present invention. present invention. The observation position 116 of the second observer 114 is shifted from an angular range to the right, unlike in FIG. 6. Thus, there will be between the first observer 110 and the second observer 114 a range of viewing angles that remains free. Figure 7 illustrates the distribution of viewing angle ranges 118, 120, 540.
    [0015] If the three-dimensional display 102 can not only be switched to the precision of the pixel, but can be adjusted more finely, it will even be possible to adjust the viewing angle ranges 118, 120, 540. This means that the viewing angle ranges 118, 120, 540 are slaved according to the position 112, 116 of the observer 110, 114, these positions being for example detected by a pursuit of the eyes. In the case of the example shown in FIG. 14 and FIG. 15 of the barrier mask 106, the position of the slots is thus modified. If there is a further variation in the number of slots, the number of viewing angle ranges 118, 120, 540 can also be adjusted. If several persons 110, 114 observe the display 102, as is the case, for example, in applications to the automobile, it is thus also possible to define, in a targeted manner, the viewing angle ranges 118, 120, 540 for several persons as illustrated in FIG. 6 and in FIG. 7. The condition for this However, it is necessary to determine the positions 112, 116 of the observers 110, 114 and also to adapt the content of the image to the ranges of viewing angles 118, 120, 540 modified. In particular, this simply appears in the fact that the resolution decreases with increasing viewing angle ranges 118, 120, 540. If the adaptation form described here ranges from viewing angles 118, 120, 540 can not be applied, it is possibly interesting to reduce the 3D effect for several observers 110, 140 or to increase the two-dimensional partial areas. FIGS. 8 to 11 each show a schematic representation of an auto-stereoscopic display 102 for two observers 110, 114 and the number and orientation of the resulting viewing angle ranges 118, 120, 540 for position 112, 116 observers 110, 114, according to an embodiment of the present invention. In order to increase the quality, according to the example of application, the position of the viewing angle ranges 118, 120, 540 is modified, the resolution is adapted to the worst case, that is to say the number the higher ranges of viewing angles required, using an application of unused pixels to optimize crosstalk or use of 2D content. This can be done by combining these different aspects.
    [0016] To increase the quality of the display, it is possible, on the one hand, to change the position of the viewing angle ranges. The only requirement for this is to have a modified circuit, including a narrower circuit for the 3D layer than in the two-dimensional display behind it, ie, for example, the resolution of the The barrier layer of FIG. 4 is greater than that of the RGB device behind it. This is possible for example in the case of a barrier layer, by shifting the openings of the barrier (see also Figure 13). Another improvement is to narrow the resolution in a narrow way. This means that in the application of two or three ranges of viewing angles 118, 120, 540, and also in the case of representing two ranges of viewing angles 118, 120, the resolution resolution of the representation of three ranges of viewing angles 118, 120, 540. The advantage is that by switching the viewing angle ranges 118, 120, 540 the resolution remains constant. This will be explained using the following examples. The horizontal resolution of the back display 108 is 1200 pixels. For two angular ranges 118, 120 there are thus in practice 600 pixels per viewing angle and in the case of three ranges of viewing angles there will be in practice 400 pixels per angle of view. According to the idea sketched thus, however, only 400 pixels in the horizontal direction are represented for two ranges of viewing angles.
    [0017] In addition, unused pixels can be used to reduce crosstalk. This is done for example by the presentation of black or by averaging the color values of neighboring pixels. In addition, to increase the quality of images for all observers 110, 114, it is possibly advantageous to reduce the 3D effect or to increase the two-dimensional partial areas. The simplest form for partially increasing the resolution and readability is to cut the three-dimensional representation when the information of the different ranges of viewing angles or viewing angle zones is identical. This two-dimensional representation in a three-dimensional object avoids local crosstalk and above all increases the resolution in this range. Figures 8 to 11 show the distribution of viewing angle ranges 118, 120, 540 when the observer 114 moves (or both observers 110, 114 according to Figure 10 do). The viewing angle ranges 118 and 120 give the representations for the left eye and for the right eye of the observer 110, 114. In addition, the representation of the pixels displayed in the two-dimensional display 108 is shown. found behind the 3D layer 106.
    [0018] FIG. 8 shows the movement of an observer 114 compared with FIG. 4, in a range of viewing angles 540. Thus, there is a switching from two ranges of viewing angles 118, 120 to three ranges of Viewing angles 118, 120, 540. Compared with FIG. 4, FIG. 9 shows the movement of an observer 114 traveling from two ranges of viewing angles. The switching then relates to two ranges of viewing angles 118, 120. FIG. 10 shows, by comparison with FIG. 4, the movement of an observer 114 according to three ranges of viewing angles 118, 120, 540. Precisely, it is a movement of the second observer 114 which moves from a range of viewing angles and a movement of the first observer 110 which moves from two ranges of viewing angles. There is thus a switching on five ranges of viewing angles 118, 120, 540.
    [0019] As compared with FIG. 4, FIG. 11 shows a movement over five ranges of viewing angles 118, 120, 540. The switching then relates to five ranges of view angles. Figures 8 to 11 show the enslavement of the auto-stereoscopic contents for several users. For example, the operations were presented using the "two observers" scenario as this is the most common application in the automotive field. For many observers, an analogous but significantly more complicated method can be applied. To do this, it is necessary to successively execute three functions: tracking the head, changing the number of viewing angle ranges, and modifying the display behind the 3D layer. The three-dimensional effect can be done for example using a barrier mask or a lens optics. The layer of the auto-stereoscopic display 102 which controls the three-dimensional effect is also called the 3D layer. In the case of a barrier mask, it will be possible to consider for each eye only a sub-pixel; the neighboring subpixel is, however, visible only by the other eye. As shown in FIG. 13, there are thus two ranges of angles of view which are repeated continuously with the modification of the angle of observation (periodicity). The idea presented here influences the 3D layer of the auto-stereoscopic display 102. In the case of the barrier mask presented by way of example, it will be possible for example to have the various barriers constituted by an LC layer that can switch. If we exclude ranges (as shown for example in Figure 14) we obtain a direct view through, on the display behind and we will have a two-dimensional representation. The layer is then modified in a different form, for example by sliding the entire image to the left or to the right or by modifying the openings of the barriers thus modifying the position of the viewing angle ranges 118, 120, but also their repetition. This means that two ranges of viewing angles 118, 120, three viewing angle ranges 118, 120, 540 or several viewing angle ranges 118, 120, 540 will be formed. In the extreme case, has a multi-view display. This latter solution should be avoided, however, as the resolution should be kept as high as possible.
    [0020] This is for example also possible with a lens optics if it can be switched, for example in that the lenses are constituted by a layer LC or also, for example, using techniques such as those of systems based on glasses with suppression, for example, partial polarization. The different ranges of viewing angles 118, 120 can be controlled on the one hand by the 3D layer and on the other hand, by the adaptation of the two-dimensional display. This means that the viewing angle ranges 118, 120 of the position of the observers 112, 116, for example detected by the head tracking, can thus be applied. If several persons 110, 114 look at the display 102 as is the case, for example, in the application to the automobile, it is also possible to define, in a targeted manner, the viewing angle ranges 118, 120 for several persons 110, 114. It is important, therefore, that when switching the ranges of view angles 118, 120 due to the movement of one of the observers 110, 114, the representation for the other observers 114, 110 remains unchanged. In the scenario of FIGS. 8 to 11, the distributions for the left and right eyes are indicated (references 118 and 120 for the corresponding viewing angle ranges). This may involve both pixels and subpixels and in the latter case it may be necessary to have another combination so that all the colors are visible to both eyes. Fig. 12 is a representation of an auto-stereoscopic display 102 with a first partial range with two-dimensional representation of the image content and a second partial range with three-dimensional disjoint representation of the image content according to an exemplary embodiment of the present invention. . The auto-stereoscopic display may be an example of an auto-stereoscopic display 102 shown in the preceding figures. The auto-stereoscopic display 102 of FIG. 13 controls or represents a first partial range 1350 for a two-dimensional display and a second partial range 1352 disjoint from the first partial range 1350 for a three-dimensional display. In the second partial range 1352 there are objects in 3D 1354. The partial range 1350 is a 2D range; the second partial range 1352 is a 3D range.
    [0021] The auto-stereoscopic display 102 comprises a device not shown in FIG. 12 to adapt the presentation of the auto-stereoscopic display. The device for adapting the presentation of the auto-stereoscopic display is made using the original image content, to define at least a first partial range of the original image content which can be represented in two dimensions and at least a second partial range of the original image content to determine the three-dimensional representation which are thus disjoint in the two partial ranges indicated. In addition, the device for adapting the presentation of the auto-stereoscopic display is made to provide a control signal which, by using the two partial ranges mentioned above, makes it possible to control a first partial range of the auto-stereoscopic display for a two-dimensional display and a second partial range disjoint from the first partial range for a three-dimensional display. In the case of two-dimensional representations based on the object, such as for written information, it is possible to force this information to always be displayed in two dimensions. In particular, for writings, readability is decisive (modulation of the MTF transfer function) so that the observer can simply enter the information. This is why this information must be displayed with a high resolution and thus objects that can delimit themselves better. In application of these considerations, it will be possible to have certain ranges with exclusively two-dimensional representations. As shown in FIG. 12, it is possible to declare ranges in which only two-dimensional objects can be displayed, such as, for example, text objects, whereas in the other ranges it is possible to present three-dimensional objects. According to one aspect of the present invention, Fig. 12 shows a display with 2D ranges and 3D ranges. In the case of the representation of the three-dimensional content, the resolution for each eye has only half the original resolution of the display without 3D effect (see also Figures 13 and 14). In the case of the 2D partial representation, the resolution in the 3D ranges is always halved, but the original resolution exists in the 2D ranges (see Figure 14). In the example shown in FIG. 4, this means for a resolution of origin of 10 pixels, a 3D representation for the pixels on the left and the pixels on the right with each time 5 visible pixels and in the case of a partial representation 2D, for the left and right we will have 7 visible pixels each time. Fig. 13 is a schematic representation of an auto-stereoscopic display 102 in a barrier technique according to an exemplary embodiment of the present invention. The auto-stereoscopic display 102 may be an exemplary embodiment such as those described in the preceding figures. The auto-stereoscopic display 102 comprises a layer 106 controlling the three-dimensional effect and an image generator installation 108. The layer 106 which controls the three-dimensional effect will hereinafter be referred to as the barrier abbreviation 106. In the presentation simplified here, the image generator installation 108 comprises a row 10 of pixels which are alternately visible by the right eye and by the left eye of an observer 110 because of the barrier 106. The letter "R" "or the letter" L "above a pixel indicates the eye (right / left) of the observer 110 which will enter the respective pixel. FIG. 14 is a schematic representation of an auto-stereoscopic display in barrier technique with partial 2D representation according to an example embodiment of the invention. The auto-stereoscopic display 102 may be an exemplary embodiment of a display 102 described in the preceding figures and an auto-stereoscopic display 102 as presented. The representation of FIG. 14 corresponds very largely to that of FIG. 13, with the difference that barrier 106 has a larger open area in which an observer can directly see the installation of images 108 which are behind and have thus a better perception of the two-dimensional representation in this region. This is how the four middle pixels are visible by both eyes. On a total of six other pixels behind barrier 106, there will thus be three per eye. Thus, each eye of the observer 110 will see seven pixels unlike the five pixels according to FIG. 13. The idea of the invention also relates to the simultaneous representation of objects with two or three dimensions. In particular, in the automotive field, this solution is advantageous because it will no longer be possible to distinguish between the mass of information of the three-dimensional display and the clarity of the two-dimensional display. According to a first application, the three-dimensional representation is neutralized if the information for the different viewing ranges or vision cones is identical. This two-dimensional representation in a three-dimensional object avoids local crosstalk and above all makes it possible to increase the resolution in this range. According to a second application, separate objects are displayed, such as, for example, written information which must always be presented in two dimensions. In particular, for writings, readability (Modulation of the Transfer Function, MTF) is a decisive element for simply perceiving the information. That is why this information must be presented with a high resolution and so with objects that are in themselves better delimited. In application of this, one can also imagine that some ranges include an exclusively two-dimensional representation. As shown in FIG. 12, it is possible to declare ranges in which only two-dimensional objects such as for example text objects are displayed, whereas in other ranges three-dimensional objects are presented. For such applications it is possible to neutralize the three-dimensional representation to the accuracy of the pixel and to present a two-dimensional representation. This is possible, among other things, with the auto-stereoscopic image or display screens 102 for which the three-dimensional effect is neutralized by the pixel switched barrier mask, in the switched lens technique or with switched polarization of the light, or by example of systems based on brightness and for which, for example, the polarization is neutralized by pixels. Fig. 13 and Fig. 14 show a switchable barrier mask 106 which is shown in Fig. 14 in a two-dimensional range. In FIG. 13 and in FIG. 14 there is a representation of a two-dimensional content in a three-dimensional environment, here an auto-stereoscopic image screen 102 with the barrier technique 106.
    [0022] In the case of the representation of the three-dimensional content, the resolution for each eye has more than half of the original resolution of the display without 3D effect as shown in FIG. 13. In the case of the partial 2D representation, the Resolution in 3D ranges is always halved, but however, the original resolution exists in the 2D ranges (see Figure 14). In the example presented, this corresponds to an original resolution of 10 pixels of the image generating installation 108. In the case of a 3D representation, there will be 5 visible pixels each time by the left eye and by the right eye of an observer 110.
    [0023] In the case of a partial 2D representation, there will be respectively 7 visible pixels for the left eye and the right eye of the observer 110. FIG. 15 is a graphical representation of the parameters of images according to the useful angle of the viewing direction and the useful angle according to an embodiment of the present invention. Geometric relationships and definitions are given in Figure 3. In Figure 15, there are 6 plots of curves in two-column Cartesian coordinate systems. The viewing angle θ or the viewing direction (a) for varying the pixel width (ρ), the opening width (h) and the apertures in the barrier as well as the distance are varied. (d) between the image generator (display) and the barrier. We have as a starting point an original scenario for the pixel width p = 100pm, the width of the aperture h = 50i_tm and the distance d = 200p.m. Thus, in the first column, the parameter has been represented with respect to the angle of view 0 and in the second column a parameter has been given with respect to the direction of view (a); in the first line. The corresponding angle is represented with respect to the pixel width (p) in the average line of the corresponding angle with respect to the opening width (h) or the diameter of the opening opening (h) and of the lowest line of the corresponding angle in relation to the distance (d). The angle of view 0 and the direction of view (a) are respectively represented on the ordinate, the pixel width (p), the opening width (h) and the distance (d) are on the abscissa. Figure 16 shows a simplified flowchart of a method 1670 for adapting a display of an auto-stereoscopic vehicle display according to an exemplary embodiment of the invention. The auto-stereoscopic display may be a variant of an exemplary embodiment of an auto-stereoscopic display shown in FIGS. 1 to 14. The method 1670 comprises a step 1672 for recording the first observation position of a first observer and at least a second observation position of at least a second observer, a step 1674 for determining a first range of viewing angles and at least a second range of viewing angles among a set of angles ranges of viewed using the first observation position and at least the second observation position, and a step 1676 for providing a control signal for controlling a layer controlling the three-dimensional effect of the auto-stereoscopic display by using all ranges of viewing angles to adapt the presentation of the auto-stereoscopic display. The viewing angle ranges represent a cone that opens from the display. According to an exemplary embodiment, in the provisioning step 1676, a content of adapted images is provided by using all the ranges of viewing angles and by using the control signal or a signal derived therefrom. The content of adapted images is provided using the contents of the original image. The control signal includes information relating to the resolution of the layer controlling the three-dimensional effect. Optionally, in the determination step 1674 at least one third range of viewing angles is determined. In an advantageous exemplary embodiment, at least five ranges of viewing angles different from each other are determined. In an exemplary embodiment, in the recording step 1672 a content of the original image is recorded and in the determination step 1674 using the content of the original image, at least one first partial range of the original image content and which are represented in two dimensions and at least a second partial range of the original image content which is represented in three dimensions is determined. In the provisioning step 1676 the control signal is determined using the first partial range and the second partial range of the original image content. The control signal is made to display a first partial range of the auto-stereoscopic display for a two-dimensional display and a second partial range disjoint from the first partial range for a three-dimensional display, the first partial range of the image content of origin and the second partial range of the original image content being disjointed. Optionally, in the supplies step 1676, the control signal represents a width and / or a position and / or an offset of a multiplicity of orifices in the layer of the auto-stereoscopic display that controls the effect. three-dimensional. Optionally, in the supplying step 1676, the control signal represents a lateral position, a lateral shift of the three-dimensional effect controlling layer for an auto-stereoscopic display image generator or a distance from the layer controlling the three-dimensional effect with respect to the image generator. The examples of embodiment described and presented in the figures are chosen only as examples. Different embodiments can be combined completely or for certain characteristics. It is also possible to complete an exemplary embodiment by features of another exemplary embodiment. In addition, the process steps presented above can be repeated and executed in an order different from the order described above. If an exemplary embodiment contains a combination and / or between a first characteristic and a second characteristic, it means that the exemplary embodiment according to one embodiment may comprise both the first characteristic and the second characteristic and according to another embodiment. it may comprise only the first characteristic or the second characteristic.
    [0024] 35 NOMENCLATURE OF MAIN ELEMENTS 100 Vehicle 102 Auto-stereoscopic display 104 Display adaptation device 106 Three-dimensional effect control layer 108 Image generator installation 110 First observer 112 First observation position 114 Second observer 116 Second observation position 118 First viewing angle range 120 Second viewing angle range 224 Recording interface 226 Angle of view determination installation 228 Control signal supply installation 230 Partial installation 232 Partial installation 234 Interface image 236 Central sensor 236 Head tracking 540 View angle range 1350 First partial range 1352 Second partial range 1354 3D object 1670 Process flow chart 1672, 1674 Process steps shown in Flowchart 1676 a Useful angle 6 Cone of vision 0 Periodicity of viewing angles d Distance of barrier mask 1 Pixel for the eye ga uche p Pixel size r Pixel for the right eye
    权利要求:
    Claims (7)
    [0001]
    CLAIMS 1 °) A method for adapting the presentation of an auto-stereoscopic display (102) for a vehicle (100), method (1670) comprising the following steps: recording (1672) a first observation position (112) d a first observer (110) and at least one second observation position (116) of at least one second observer (114), determining (1674) a first range of viewing angles (118) and at least one second viewing angle range (120) as well as a set of viewing angle ranges (118, 120, 540) using the first viewing position (112) the second viewing position (116) , the viewing angle ranges (118, 120, 540) each representing an open cone from the display (102), and providing (1676) a control signal for controlling a layer (106) controlling the effect three-dimensional aspect of the auto-stereoscopic display (102) using all the viewing angle ranges (118, 120, 540) to adapt the presentation of the auto-stereoscopic display (102).
    [0002]
    Method according to Claim 1, characterized in that in the provisioning step (1676) an adapted image content is provided using all the viewing angle ranges (118, 120, 540). and / or using the control signal and / or a signal derived therefrom and / or using original image content.
    [0003]
    Method according to Claim 1, characterized in that in the determination step (1674) at least a third range of viewing angles (540) is determined, in particular up to five angle ranges of view (118, 120, 540) different from each other.
    [0004]
    Method according to claim 1, characterized in that in the supply step (1676) the control signal for the control layer (106) of the three-dimensional effect of the auto-stereoscopic display (102) is provided. the layer (106) controlling the three-dimensional effect being formed as a barrier layer and / or a lens optics.
    [0005]
    Method according to Claim 1, characterized in that in the supply step (1676) the control signal represents the resolution of the layer (106) controlling the three-dimensional effect and / or information relating to the resolution. the layer (106) controlling the three-dimensional effect.
    [0006]
    Method according to claim 1, characterized in that in the recording step (1672) an original image content is recorded and in the determination step (1674), using the content of original images at least a first partial range of the original image content which can be represented in two dimensions and at least a second partial range of the original image content which can be represented in three dimensions and in the supply step (1676) the control signal is provided using the first partial range and / or the second partial range of the original image content, in particular the control signal is made to control a first partial range. (1350) of the auto-stereoscopic display (102) for a two-dimensional display and / or a second partial range (1352) disjoint from the first partial range (1350) for a three-dimensional display.
    [0007]
    Method according to claim 1, characterized in that in the supply step (1676) the control signal represents a width and / or a position and / or an offset of a set of orifices in the layer (106) controlling the three-dimensional effect of the auto-stereoscopic display (102) .8 °) The method according to claim 1, characterized in that in the supplying step (1676) the control signal represents a lateral position and or a lateral shift of the layer (106) controlling the three-dimensional effect for an image generator (108) of the auto-stereoscopic display (102) and / or a distance (d) of the layer (106) ) controlling the three-dimensional effect for the image generator (108). 9 °) Device made to carry out all the steps of the method (1670) according to any one of claims 1 to 8. 10 °) computer program designed to perform all the steps of the method (1670) according to any one of Claims 1 to 8 and sup- port of memory visible by a machine containing the recording of the computer program. 20
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    优先权:
    申请号 | 申请日 | 专利标题
    DE102014205519.9A|DE102014205519A1|2014-03-25|2014-03-25|Method and apparatus for adapting a display of an autostereoscopic display for a vehicle|
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