EP1410096A2 - Systeme de projection - Google Patents

Systeme de projection

Info

Publication number
EP1410096A2
EP1410096A2 EP02754919A EP02754919A EP1410096A2 EP 1410096 A2 EP1410096 A2 EP 1410096A2 EP 02754919 A EP02754919 A EP 02754919A EP 02754919 A EP02754919 A EP 02754919A EP 1410096 A2 EP1410096 A2 EP 1410096A2
Authority
EP
European Patent Office
Prior art keywords
mirror
projection
arrangement according
projection arrangement
projection surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP02754919A
Other languages
German (de)
English (en)
Inventor
Reinhold Fiess
Andreas Deter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
LDT Laser Display Technology GmbH
Original Assignee
Robert Bosch GmbH
Schneider Laser Technologies AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH, Schneider Laser Technologies AG filed Critical Robert Bosch GmbH
Publication of EP1410096A2 publication Critical patent/EP1410096A2/fr
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3129—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] scanning a light beam on the display screen
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0149—Head-up displays characterised by mechanical features
    • G02B2027/0154—Head-up displays characterised by mechanical features with movable elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
    • H04N5/7416—Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal

Definitions

  • the invention relates to a projection arrangement with a projector unit and a projection surface, the projector unit for generating an image on the projection surface illuminating it with a light bundle for each pixel of the image to be generated and the projection surface has a beam expansion device for expanding light bundles passing through it
  • Such a projection arrangement is known from DE 195 40 108 C2, this projection arrangement being arranged in a motor vehicle within the dashboard and having imaging optics arranged downstream of the projection surface, the object-side focal point of which lies between the projector unit and the beam expansion device Reflection on the windshield can be perceived by the viewer as a virtual image
  • a holographic projection surface for a vehicle is known from DE 197 30 563 A1.
  • the radiation of the image information is intended to take place in an angle range which is predetermined and adjustable during the production of the hologram, towards the viewer, the holographic projection surface absorbing the ambient light and only the light for the image display
  • the disadvantage is that the practically uncontrollable dependence of the properties of such a projection surface on the wavelength of the incident light bundle and the direction of incidence of the light bundle of the useful light proves to be furthermore the fact that the image is displayed and the appearance of the projection surface itself is very strong depending on the observation Proceeding from this, it is an object of the invention to develop a projection arrangement of the type mentioned at the outset in such a way that a high-quality image display can be achieved.
  • the object is achieved in a projection arrangement of the type mentioned at the outset in that the projection surface has a mirror and in that the beam expansion device, as seen in the direction of the light beam incident on the projection surface, is connected upstream of the mirror, the mirror coming from the projector unit through which Beam widening device passing through and hitting the mirror reflects such that at least one emerging light bundle passing through the beam widening device is produced with a main beam, the main beams coming from emerging light beams coming from locations (or locations on) that are adjacent in a first direction Go out projection surface, converge in an imaginary field of view lying in a plane, and wherein the widening caused by the beam expansion device of each emerging light beam is determined so that the emerging light beam del diverge in each case and no longer illuminate the field of view in the plane.
  • the projection arrangement according to the invention is used in a means of transport, e.g. a motor vehicle, a contrast difference of up to 1: 500 can be achieved.
  • the construction of the projection arrangement is comparatively simple due to the projection area, as a result of which the projection arrangement can be implemented particularly cost-effectively.
  • the energy consumption of the projection arrangement is extremely low and can be, for example, less than 50 watts.
  • the projection surface is curved.
  • the curvature can be different in different directions, and in particular the curvature can also be chosen such that the projection surface is, for example, corrugated. Regardless of the existing curvature of the projection surface, however, its directional characteristic is still given, so that the geometric shape of the projection surface can advantageously be selected independently of its optical properties.
  • This can be used, for example, to ensure that the projection surface is in one when using the projection arrangement according to the invention
  • Motor vehicle is adapted to the (curved) shape of the dashboard and is provided on this or as an integral part thereof. This fulfills the high demands placed on the design, particularly in motor vehicle construction.
  • the beam expansion device comprises a scattering layer, which can in particular be designed as a film.
  • a scattering layer can be provided with a small air gap to or directly on the mirror, as a result of which an optimal image quality is achieved.
  • the scattering layer can preferably have the same curvature as the projection surface, so that it can be made extremely compact.
  • the intensity distribution of the emerging light bundles is determined by means of the beam expansion device so that the intensity of the main beam is greatest for each light bundle and decreases for the remaining light beams with an increasing angle relative to the main beam. Good image quality is achieved through this intensity distribution.
  • the beam expansion device can also comprise an aperture which shades incident light from directions other than the directions of the light bundles coming from the projector unit and as the directions of the emerging light bundles.
  • an aperture ensures that the incident light bundles hit the mirror unhindered and the emerging light bundles can be seen by the viewer, while unwanted ambient light is shadowed and thus does not deteriorate the quality of the image display.
  • the screen when the projection arrangement is used in a motor vehicle, the screen also ensures that the projection surface is not perceived as a brightly lit surface from outside the vehicle.
  • the panel can also be colored in the same color as that of the dashboard, so that the projection surface can be completely integrated optically in the dashboard.
  • the diaphragm comprises a plurality of spaced-apart and mutually parallel slats which block light striking it.
  • the diaphragm can also still have a plurality of spaced-apart and mutually parallel second lamellae, which open the they block the light that hits them and are arranged transversely to the first slats.
  • Such screens with lamellae are described, for example, in US Pat. No. 6,239,911 B1 and are commercially available as foils, so that the projection arrangement according to the invention can be implemented in a simple manner.
  • the mirror can comprise a curved, continuous reflection layer.
  • This can e.g. be realized by a mirrored surface of a carrier, the surface being designed as a continuously running free-form surface.
  • the curvature of the free-form surface is chosen so that the convergent course of the main rays is effected for the corresponding image point in the case of specular reflection of the incident light beam.
  • the mirror is designed as a multi-surface mirror with a multiplicity of flat mirror surfaces, it being possible for part of the scattering layer to be applied directly as a coating to each mirror surface.
  • the inclination of the mirror surfaces is determined independently of the desired curvature of the projection surface.
  • the mirror surfaces can be arranged such that the surface normals of at least two mirror surfaces are not parallel to one another.
  • the arrangement is preferably selected such that the convergent course of the main rays is effected by means of the reflection.
  • the directional characteristic of the projection surface can thus be set independently of a desired curvature of the projection surface, so that the projection surface can easily be adapted to predetermined framework conditions.
  • the area of each mirror surface is smaller than the size of a pixel of the image to be generated on the projection surface, the improvement in image quality being very good when the number of mirror elements is twice the number of pixels ,
  • an incident light bundle can then generate a plurality of non-parallel, emerging light bundles due to the reflections of the incident light bundle on several mirror surfaces.
  • the mirror is a rear surface mirror.
  • the mirror in the projection arrangement according to the invention can comprise a transparent plate in which at least one side is structured in such a way that the direction of a light beam passing through the plate is changed. This ensures a particularly simple possibility of realizing the mirror.
  • the plate can also be designed in such a way that, due to the change in direction caused by it, the convergent course of the main rays is brought about.
  • the side of the plate facing away from the beam expansion device is preferably structured and mirrored, so that the mirror can be realized in a compact manner by a single element. This also makes it possible to reduce the production costs of the mirror and thus of the projection arrangement according to the invention.
  • the main rays from emerging light bundles which emanate from the neighboring locations of the projection surface in a second direction, to converge in the field of view due to the reflection on the mirror, the second direction being different from the first direction.
  • the two directions can enclose an angle of 90 °.
  • all the main rays of the emerging light bundles can converge in the field of view.
  • the projector unit can generate an intensity-modulated light beam and steer it over the projection surface in order to generate the image.
  • This deflection of the light bundle can be grid-like (the deflection takes place line by line over the entire image area, the light bundle being keyed dark in the case of dark pixels) or vector-like (the deflection essentially only takes place along the bright pixels). This enables a simple way of generating the real image on the projection surface.
  • the light beam is preferably essentially collinear and can preferably have a beam product of less than 0.2 mm mrad (e.g. 0.1 mm mrad). Such a light beam can be generated particularly easily and efficiently with a laser, it being monochromatic or, for colored images, polychromatic.
  • the desired image can be generated by means of a tilting mirror matrix or an LCD module and can be projected onto the projection surface by means of projection optics.
  • the projection assembly according to the invention can be used advantageously where an image having focused radiation to be radiated from a surface having a predetermined surface shape, since the projection surface of the projection arrangement according to the invention the predetermined surface shape can be formed in accordance with '.
  • the projection arrangement according to the invention is used in a motor vehicle, the projection surface preferably being formed on the dashboard or as a component thereof.
  • the projection arrangement according to the invention can be designed such that the real image on the projection surface can be directly grasped by the viewer. In this case, a very high quality representation of a real image is advantageously achieved.
  • the projection arrangement according to the invention can also have a reflection surface (preferably essentially flat) arranged downstream of the projection surface, on which the emerging light bundles are reflected such that the image generated on the projection surface can be captured as a virtual image. Therefore, the projection surface can advantageously be arranged so that it is not directly visible to the viewer, which means that the arrangement options of the
  • the reflection surface can be realized particularly simply through the windshield (or also through a windshield arranged in the vehicle directly in front of the windshield, which is preferably flat). Since the image can be generated on the projection surface in the desired size, there is advantageously no imaging optics between the projection and the
  • this virtual image can be captured in the scene image by the viewer in front of the windshield (and thus outside the vehicle), so that the viewer or the driver's eyes are only slight when viewing the virtual image must accommodate.
  • the curvature of the windshield provides a small change in the image dimensions, whereby the geometric corrections of the image known from an oblique projection, such as e.g. is described in DE 197 37 374 C2, can be carried out.
  • the expansion of the emerging light bundles is preferably effected isotropically, so that the beam expansion device can be designed in a particularly simple manner.
  • the divergence angle of the emerging light bundles can be 2 to 10 ° in space conditions, as are typical in a motor vehicle, a divergence angle of 5 ° having proven to be particularly advantageous. It is of course also possible for the widening of the emerging light bundles to be effected anisotropically, for example if the field of view is to have different widths and heights.
  • the reflection layer of the mirror on which the specular reflection takes place, can be structured such that the function of the beam expansion device is also effected during the reflection.
  • a mirror can be produced, for example, by molding the desired surface structure into a surface of a plate and then mirroring the structured surface.
  • FIG. 1 shows a side view of an embodiment of the projection arrangement according to the invention
  • Fig. 2 is an exploded view of an enlarged section of that shown in Fig. 1
  • FIG. 3 is a side view of the embodiment of Fig. 1, with ray traces being drawn in for explanation;
  • FIG. 4 shows the embodiment of FIG. 3 from the driver's perspective
  • Fig. 5 is an enlarged sectional view of a section of that shown in Fig. 3
  • Projection screen 6 shows an embodiment of the mirror of the projection surface; 7 shows a further embodiment of the mirror of the projection surface;
  • Fig. 8 is a side view of another embodiment of the invention.
  • Projection device 9 shows a side view of a further embodiment of the projection arrangement according to the invention
  • FIG. 10 shows a side view of yet another embodiment of the projection arrangement according to the invention.
  • FIG. 1 shows a side view of an embodiment of the projection arrangement according to the invention, which is installed in a motor vehicle and comprises a projector unit 1 and a projection surface 2.
  • the projector unit 1 is arranged in the roof area within the motor vehicle close to its windshield 3 and the projection surface 2 is mounted on a dashboard 4, the shape of the projection surface 2 being the shape that is usually in different directions is differently curved, the dashboard 4 is adapted
  • the projection surface 2 is formed as an integral part of the dashboard 4 and it can typically have a size of 35 cm in width and 10 cm in height
  • the projector unit 1 generates an intensity-modulated, essentially parallel light bundle 5, which, as shown schematically in FIG. 1, directs it over the projection surface 2 in order to set a real image thereon.
  • the projection surface 2 emits the light coming from the projector unit 1 as an emerging light bundle 6 only in a predetermined area 7 towards the driver 8 so that the driver can capture the real image on the projection surface 2 when he is sitting in the driver's seat of the vehicle
  • the image on the projection surface 2 is only visible for any distance from the projection surface within a viewing field lying in one plane, the viewing field 9 being shown directly in the area of the driver's eyes 10 in FIG. 1
  • the size of the field of view 9 is determined by the radiation characteristics of the projection surface 2, the radiation characteristics being set by the measures described in detail below so that drivers 8 with different body sizes can see the image on the projection surface 2.
  • the usual range of movement of the head and thus the range of movement of the eyes is taken into account, so that here the square field of view 9 has an extension of approximately 30 x 30 cm at a distance of approximately 800 mm from the projection surface 2
  • the projection surface 2 comprises, as can be seen from the exploded view of a section of the projection surface 2 in FIG. 2, a multifaceted mirror 11 on which a beam expansion device 12 with a scattering layer 13 and a blind cover 14 is applied
  • the multi-surface mirror 11 of the projection surface 2 serves to locally reflect the incident light bundles 5 of the projector unit 1 locally, while the diffusion layer 13 is provided for the desired beam expansion of the reflected bundle 6.
  • the blind panel 14 can, if necessary, limit the through the scattering layer 13 caused by the beam expansion are also used to prevent undesired ambient conditions from striking the multifaceted mirror 11 and worsening the image display and that the real image is visible to third parties.
  • the multipurpose mirror 11, the scattered layer 13 and the blind aperture 14 are optimized with regard to their optical tasks
  • the structuring is carried out in such a way that a multiplicity of microprisms 16 are formed, one prism surface in each case being used as a flat mirror surface 17.
  • the microprisms 16 it is possible to set the inclination of the mirror surfaces 17 completely independently of one another and also within wide limits independently of the geometric (macroscopic) shape of the projection surface 2.
  • the setting is set such that the light beams reflected on the mirror surfaces 17 are reflected only in the spatial region 7, as will be described in detail below.
  • the scattering layer 13 is designed as a film which lies directly above the multifaceted mirror 11 and has the effect that the angle of divergence (half the opening angle of the light beam) of a light beam passing through the scattering layer 13 is increased, as indicated in FIG. 2 by the scattering lobe 18 shown.
  • the widening caused by the scattering layer 13 is selected here so that the divergence angle of the emerging light beam 6 is in the range from 2 to 10 °.
  • a holographic diffuser from POC Physical Optics Corporation, Torrance, Canada, can be used as the diffusion layer 13, which advantageously has a relatively high degree of transmission independence for the wavelengths used here.
  • a blind cover 14 is applied, which is designed as a film and has a plurality of spaced-apart and mutually parallel slats 19 which absorb light falling on them.
  • the distance between the slats 19, their inclination in the film and their height can limit the angular range of the incoming and outgoing light transversely to the slats 19, the Venetian blind 14 being designed such that the incoming and outgoing light beams 5, 6 can pass the blind cover unhindered.
  • the shutter 14 prevents, in particular, that external light (eg sunlight and interior lighting) which strikes the projection surface 2 undesirably is perceived by the driver 8 on the projection surface 2.
  • the blind panel 14 can be colored in the same color as that of the dashboard 4, so that the outer appearance of the projection surface 2 is adapted to that of the dashboard 4.
  • the shutter 14 also prevents the projection surface 2 from appearing outside the vehicle as a luminous surface.
  • a Venetian blind film 14 with desired properties can be obtained, for example, from 3M. As can best be seen from the side view of FIG.
  • the projector unit 1 contains three laser light sources 20, 21, 22, each of which emits an intensity-modulated collinear (or essentially collinear) light beam in one of the primary colors red, green and blue , a beam merging unit 23, which overlays the three light beams of the laser light sources 20, 21 and 22 to form a common red-green-blue light beam, which then uses a biaxial deflection system 24 of the projector unit 1 in a row direction (parallel to the windshield 3) and one vertical column direction is rastered over the projection surface 2.
  • the deflection angle in the column direction is ⁇ , and, as shown in FIG.
  • the deflection angle in the row direction is ⁇
  • the beam path for different pixels P1, P2, P3, P4, P5 and P6 is shown on the projection surface 2 (with the points P1-P3 in the column direction and the points P4-P6 in the row direction adjacent).
  • the deflection system can have a known transformation optics (not shown) in the beam path, with which the desired adjustment of the deflection angle and thus the image size can be carried out.
  • the essentially collinear light beam 5 the beam product of which is smaller than 0.2 mm mrad (for example 0.1 mm mrad) and which is directed onto the projection surface 2 to generate the pixels P1 to P6, radiated from the projection surface 2 in each case as a divergent light bundle 6 with a main beam 25 (the main beam 25 is the beam which is generated due to the specular reflection without the beam expansion and thus in accordance with the law of reflection (angle of incidence is equal to the angle of reflection)), all main beams 25 in Eye point 26 converge in the field of view 9 or in a spatial area enclosing the eye point 26.
  • the corresponding mirror surface 17 is inclined for each of the pixels P1 to P6 in such a way that the main rays 25 are deflected towards the eye point 26 when the incident light bundle 5 is reflected.
  • the inclination of the mirror surfaces 17 is thus set as a function of their local position in the projection surface 2, their distance from the eye point 26 and the angle of incidence of the light beam 5 striking them in accordance with the law of reflection.
  • the optical plumb 27 is shown for the pixel P2 and in FIG. 4 the optical plumb 27 'is shown for the pixel P5.
  • a macroscopic surface normal 28 for the pixel P2 and a macroscopic surface normal 28 'for the pixel P5 to the projection surface 2, as can be seen in FIGS. 3 and 4, it can be seen that the optical direction in both the row and the column direction Lot 27, 27 'and the surface normal 28, 28' are inclined differently.
  • the angles ⁇ and ⁇ that they enclose are shown in FIGS.
  • the (macroscopic) surface shape of the projection surface 2 can be selected independently of the desired direction of the reflected light bundles 6. It is therefore possible to produce the desired optical properties of the projection surface 2 as largely as possible regardless of the shape (or curvature) of the projection surface 2.
  • the light bundle reflected on the mirror surfaces 17 is expanded by the scattering layer 13 such that the divergence angle gen of the emerging light bundle 6 in the column direction and the divergence angle ⁇ in the row direction each assume a predetermined value. These values result from the distance of the field of view 9 from the projection surface 2 and are chosen such that the diverging light beams 6 only illuminate the field of view 9.
  • the divergence angles ⁇ , ⁇ of the emerging light bundles 6 are each preferably approx 5 °, whereby the expansion by means of the scattering layer 13 takes place isotropically, so that the divergence angles ⁇ , ⁇ are the same.
  • the scattering lobes 18 for the outgoing light bundles 6 are also shown. From the scattering lobes 18 it can be seen that the image brightness is highest in the center of the field of view 9 and decreases towards the edges, the decrease starting from the center being initially relatively small and then decreasing very sharply in the edge region. This results in a relatively good uniformity of the image brightness over the entire field of view.
  • the directional radiation characteristic of the projection surface 2 advantageously also ensures that almost all of the light energy used for the projection is imaged into the field of view 9 and thus into the range of motion of the eyes 10. Thereby A sufficient brightness of the projected image can be brought about so that the image can be easily recognized by the driver 8 even in daylight.
  • the projection surface 2 generates an emerging light bundle 6 with the main beam 25 from each incident light bundle 5, the direction of which is determined on the basis of the specular reflection on the mirrored microprism surfaces 17.
  • the divergence angle ⁇ , ⁇ of the emerging light bundle 6 is set by the diffusion layer 13, whereby, in the example shown in FIG. 5, the blind aperture 14 also contributes to the limitation of the divergence angle, since it causes the scattered rays to form one large divergence angle would be absorbed.
  • the divergence angle of the emerging light bundles 6 generated by means of the diffusion layer 13 can be specifically reduced.
  • the multi-surface mirror 11 comprises a first and a second PMMA plate 29, 30.
  • first and a second PMMA plate 29, 30 On the surface of the first plate 29, parallel grooves 31 are formed which have a V-shaped cross section (as shown in the enlarged detail). This surface is mirrored, so that flat mirror surfaces 17 with an angle of attack of 40 ° are provided.
  • the second PMMA plate 30 has a flat side 30 'facing the first PMMA plate 29 and an opposite second side 32 which comprises a plurality of parallel grooves 33 with a V-shaped cross section, a first side of the V -shaped cross section is almost perpendicular to the flat side 30 'and the other side of the V-shaped cross section, which serves as the optical active surface 34, forms a smaller angle with the flat side 30' than the first side. Furthermore, the angle of inclination of the active surfaces 34 of the grooves 33 increases from the center M of the second plate 30 to the outside in the direction transverse to the groove direction on both sides.
  • the second PMMA plate 30, the effect of which corresponds to that of a cylindrical lens, is applied to the first PMMA plate 29 such that the grooves 33 run transversely to the grooves 31.
  • the deflection of the emerging light bundle 6 is generated on the one hand by the refraction in the second plate 30 and on the other hand by the reflection on the first plate 29.
  • FIG. 7 shows a further possible embodiment of the multi-surface mirror 11, a groove structure having a V-shaped cross section having grooves 36 being formed on the underside of a PMMA plate 35 and the groove structure being mirrored.
  • One of the PMMA is on the top of the plate 35
  • Plate 30 corresponding grooved structure applied so that the multi-surface mirror 11 is designed as a rear surface mirror
  • FIG. 8 Another embodiment of the projection arrangement according to the invention is shown in FIG. 8. This differs from the embodiment shown in FIG. 1 in that the projector unit 1 is no longer installed in the roof area of the motor vehicle, but rather inside or behind the dashboard 4
  • the light bundles 5 emitted by the projector unit 1 run essentially parallel to the windshield 3 and meet a deflection mirror 37 arranged in the roof area within the motor vehicle close to the windshield 3, at which they are reflected so that they in turn run essentially parallel to the windshield 3 and hit the projection surface 2.
  • the deflection mirror 37 can be adjusted and fixed in its position in order to adjust the image position as desired by the driver. It is preferably only used for folding the beam path.
  • the projector unit 1 can be arranged in the dashboard 4, which means that the space required for the projection arrangement of the interior of the vehicle accessible to the driver is only determined by the (small) deflection mirror 37
  • the installation space for the deflecting mirror 37 can be covered, for example, by the rear-view mirror 38. If, as shown in FIG. 8, a cover 39 is also applied to the windshield 3, the deflecting mirror 37 is also not recognizable from outside the vehicle. This concealing the deflecting mirror 37 is possible in the same way for the projector unit 1 in the embodiment shown in FIG. 1
  • FIG. 9 A further embodiment of the projection arrangement according to the invention is shown in FIG. 9, in contrast to the previously described embodiments the projection surface 2, in particular the blind panel 14, is designed such that the projection surface 2 cannot be viewed directly by the driver 8.
  • the driver 8 sees the image of the real (intermediate) image generated on the projection surface 2 reflected on the inside 40 of the windshield 3, so that for the driver 8 a (virtual) image 41 of the real intermediate image generated on the projection surface 2 in front of the windshield 3 in Real scene image appears.
  • the remaining elements of the projection arrangement of FIG. 9 essentially correspond to those of the embodiment shown in FIG. 1 and are therefore identified by the same reference numerals
  • the existing degree of reflection of the glass-air interface leads to a sufficiently bright image impression.
  • Known measures such as, for example, a broadband reflection increase on the inner surface 40 of the windshield 3, can be carried out in order to suppress a ghost image which can arise as a result of reflection at the outer interface of the windshield 3.
  • a panel 42 can still be provided in the area of the dashboard 4 on the inside 40 of the windshield 3, so that the projection surface 2 is not visible from the outside.
  • FIG. 10 A projection arrangement which has been modified somewhat in comparison to the embodiment shown in FIG. 9 is shown in FIG. 10, the projector unit 1 now not in the roof area of the motor vehicle but within the dashboard 4 (in the same way as in the projection arrangement of FIG. 8). is arranged.
  • the deflecting mirror 37 is arranged in the roof area of the motor vehicle between the rear view mirror 38 and the aperture 39.
  • the light beams 5 emitted by the projector unit 1 run essentially parallel to the windshield 3 and meet the deflection mirror 37, which then reflects them back onto the projection surface 2, the light beams 6 emanating therefrom being reflected on the inside 40 of the windshield 3 in such a way that in turn A virtual image 41 is visible to the driver 8, which is located outside the motor vehicle in front of the windshield 3 in the real scene image.
  • the projector unit 1 in other areas of the roof area or in the area of the lateral border of the windshield 3, such as to arrange the A-pillar so that it can project obliquely onto the projection surface 2 or provide necessary deflecting mirrors if necessary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Instrument Panels (AREA)
  • Projection Apparatus (AREA)

Abstract

L'invention concerne un système de projection comprenant une unité de projection (1) et une surface de projection (2). Pour produire une image sur la surface de projection (2), l'unité de projection (1) éclaire ladite surface au moyen d'un faisceau lumineux (5) pour chaque point d'image de l'image à produire. La surface de projection (2) comprend un miroir (11), ainsi qu'un dispositif d'expansion de faisceau (12) situé en amont du miroir (11), vu dans le sens du faisceau lumineux (5) incident sur la surface de projection. Le miroir (11) réfléchit chaque faisceau lumineux provenant de l'unité de projection (1), traversant le dispositif d'expansion de faisceau (12) et rencontrant le miroir (11) de telle sorte qu'au moins un faisceau lumineux émergent (6) ayant traversé le dispositif d'expansion de faisceau (12) soit produit avec un rayon principal (25). Les rayons principaux (25) des faisceaux lumineux émergents (6), qui partent de zones voisines de la surface de projection (2) dans une première direction, convergent dans un champ d'observation (9) imaginaire situé dans un plan. Par ailleurs, l'expansion de chaque faisceau lumineux émergent (6), générée par le dispositif d'expansion de faisceau (12), est définie de telle sorte que les faisceaux lumineux émergents (6) divergent tous et éclairent uniquement le champ d'observation (9) dans le plan.
EP02754919A 2001-07-20 2002-07-19 Systeme de projection Ceased EP1410096A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10135342 2001-07-20
DE2001135342 DE10135342C1 (de) 2001-07-20 2001-07-20 Projektionsanordnung
PCT/EP2002/008099 WO2003016982A2 (fr) 2001-07-20 2002-07-19 Systeme de projection

Publications (1)

Publication Number Publication Date
EP1410096A2 true EP1410096A2 (fr) 2004-04-21

Family

ID=7692464

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02754919A Ceased EP1410096A2 (fr) 2001-07-20 2002-07-19 Systeme de projection

Country Status (5)

Country Link
EP (1) EP1410096A2 (fr)
JP (1) JP4159466B2 (fr)
AU (1) AU2002321250A1 (fr)
DE (1) DE10135342C1 (fr)
WO (1) WO2003016982A2 (fr)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60319550T2 (de) * 2003-12-18 2009-03-26 Harman Becker Automotive Systems Gmbh Projektions- und Navigationssystem für ein Fahrzeug
DE102006004085A1 (de) * 2006-01-25 2007-08-02 Jenoptik Ldt Gmbh Projektionsanordnung für ein Head Up Display und Verfahren zu deren Steuerung
US20080088527A1 (en) * 2006-10-17 2008-04-17 Keitaro Fujimori Heads Up Display System
DE102007048850A1 (de) * 2007-10-11 2009-04-16 Robert Bosch Gmbh Optische Anzeigeeinrichtung mit einem Mikrolinsenarray
DE102007048851A1 (de) * 2007-10-11 2009-04-16 Robert Bosch Gmbh Optische Anzeigeeinrichtung mit einer Laserlichtquelle
DE102008041336A1 (de) 2008-08-19 2010-02-25 Robert Bosch Gmbh Laserprojektionssystem zur Modulierung und/oder Abbildung von Laserstrahlen
EP2200332A1 (fr) 2008-12-17 2010-06-23 Robert Bosch GmbH Affichage auto-stéréoscopique
DE102009007198A1 (de) * 2009-02-03 2010-08-12 GM Global Technology Operations, Inc., Detroit Fahrzeug mit Armaturenbrett und Anzeigevorrichtung für das Armaturenbrett sowie ein Verfahren zur Herstellung der Anzeigevorrichtung
US20140176397A1 (en) * 2011-03-11 2014-06-26 Johnson Controls Gmbh Display device for a vehicle, and a method for operating such a display device
US8553334B2 (en) * 2011-11-16 2013-10-08 Delphi Technologies, Inc. Heads-up display system utilizing controlled reflections from a dashboard surface
JP5673607B2 (ja) 2012-05-30 2015-02-18 株式会社デンソー スクリーン部材及びヘッドアップディスプレイ装置
EP2728395A1 (fr) * 2012-10-31 2014-05-07 Delphi Technologies, Inc. Système d'affichage tête haute
JP5689910B2 (ja) * 2013-03-12 2015-03-25 本田技研工業株式会社 ヘッドアップディスプレイ装置
DE102013021821A1 (de) * 2013-12-21 2015-06-25 Valeo Schalter Und Sensoren Gmbh Head-Up-Display und zweispuriges Kraftfahrzeug mit einem solchen Head-Up-Display
US11972586B2 (en) 2015-02-13 2024-04-30 Carnegie Mellon University Agile depth sensing using triangulation light curtains
US11747135B2 (en) 2015-02-13 2023-09-05 Carnegie Mellon University Energy optimized imaging system with synchronized dynamic control of directable beam light source and reconfigurably masked photo-sensor
US11493634B2 (en) 2015-02-13 2022-11-08 Carnegie Mellon University Programmable light curtains
US11425357B2 (en) * 2015-02-13 2022-08-23 Carnegie Mellon University Method for epipolar time of flight imaging
FR3042608A1 (fr) * 2015-10-15 2017-04-21 Valeo Vision Dispositif de projection pour vehicule automobile
CN108501722B (zh) * 2018-03-30 2020-06-02 京东方科技集团股份有限公司 一种车载显示系统
WO2020233492A1 (fr) * 2019-05-17 2020-11-26 未来（北京）黑科技有限公司 Dispositif d'affichage, affichage tête haute et véhicule à moteur
GB2623850A (en) * 2022-03-29 2024-05-01 Envisics Ltd Display system and light control film therefor
GB2607672B (en) * 2022-03-29 2023-06-28 Envisics Ltd Display system and light control film therefor

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3919559A (en) * 1972-08-28 1975-11-11 Minnesota Mining & Mfg Louvered film for unidirectional light from a point source
JPS62147444A (ja) * 1985-12-20 1987-07-01 Seiko Epson Corp 反射型スクリ−ン
PT9166T (pt) * 1995-05-04 1996-12-31 Joaquim Antonio Abrantes Cande Ecran de projeccao de grande ganho luminoso
DE19540108C2 (de) * 1995-10-27 1998-08-06 Ldt Gmbh & Co Vorrichtung zur Darstellung eines ersten Bildes in einem durch eine durchsichtige Scheibe sichtbaren zweiten Bild
DE19730563A1 (de) * 1997-07-17 1999-02-11 Daimler Benz Ag Verwendung eines holographischen Bildschirmes als Darstellungsfläche in einem Fahrzeug
US6185038B1 (en) * 1997-09-26 2001-02-06 Matsushita Electric Industrial Co., Ltd. Rear projection screen with light diffusion sheet and projector using same
DE19751649A1 (de) * 1997-11-21 1999-05-27 Bosch Gmbh Robert Anzeigeeinrichtung für Fahrzeuge
JP4258071B2 (ja) * 1999-08-04 2009-04-30 コニカミノルタホールディングス株式会社 映像表示装置
DE19961572C2 (de) * 1999-12-21 2003-10-09 Bosch Gmbh Robert Anzeigevorrichtung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03016982A3 *

Also Published As

Publication number Publication date
AU2002321250A1 (en) 2003-03-03
JP4159466B2 (ja) 2008-10-01
DE10135342C1 (de) 2002-10-31
JP2005500567A (ja) 2005-01-06
WO2003016982A3 (fr) 2003-11-20
WO2003016982A2 (fr) 2003-02-27

Similar Documents

Publication Publication Date Title
DE10135342C1 (de) Projektionsanordnung
DE112017006376B4 (de) Blickfeldanzeigevorrichtung
DE112016005488B4 (de) Head-Up-Display und mit Head-Up-Display ausgestattetes mobiles Objekt
DE19540108C2 (de) Vorrichtung zur Darstellung eines ersten Bildes in einem durch eine durchsichtige Scheibe sichtbaren zweiten Bild
DE69119017T2 (de) Bildanzeigegerät
DE102006053608B4 (de) Leuchtanzeigengerät
EP1194805B1 (fr) Systeme et procede de representation d'image pour vehicules
DE102020211662B3 (de) Gerät zum Generieren eines virtuellen Bildes mit einem Verstellmechanismus für Entspiegelungslamellen
DE102011075884A1 (de) HUD mit holographischen optischen Elementen
DE112019004715B4 (de) Head-up display
WO2019243250A1 (fr) Dispositif d'affichage de champ de vision pour véhicule automobile
DE102018203875A1 (de) Kraftfahrzeug
DE2753545A1 (de) Kraftfahrzeugscheinwerfer mit polarisiertem und unpolarisiertem lichtanteil
DE102012219723A1 (de) Blickfeldanzeigegerät und Verfahren zum Projizieren einer Information für einen Fahrer eines Fahrzeugs
WO2019238842A1 (fr) Appareil pour la génération d'une image virtuelle comprenant une ouverture dépendant du point de champ
DE10157605C1 (de) Projektionsvorrichtung zur Erzeugung eines Bildes
WO2021160325A1 (fr) Appareil d'affichage tête haute à rétroéclairage efficace en énergie lumineuse pour véhicule
DE102020103824A1 (de) Projektionseinheit für eine Blickfeldanzeigevorrichtung in einem Fahrzeug
DE102019133624A1 (de) Projektionseinheit für eine Blickfeldanzeigevorrichtung zum Einsatz in einem Fahrzeug
EP3807702B1 (fr) Appareil pour la génération d'une image virtuelle comprenant une correction des reflets
DE112020004339T5 (de) Lichtquellenvorrichtung und informationsanzeigesystem, das selbige verwendet
DE202006020591U1 (de) Head-Up-Display-System für Kraftfahrzeuge
EP3807706A1 (fr) Appareil permettant de générer une image virtuelle à ouverture numérique dépendant du point de champ
DE102019131732A1 (de) Projektionseinheit für eine Blickfeldanzeigevorrichtung zum Einsatz in einem Fahrzeug
DE102019131730A1 (de) Blickfeldanzeigevorrichtung für ein Fahrzeug

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20031203

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ROBERT BOSCH GMBH

Owner name: JENOPTIK LDT GMBH

17Q First examination report despatched

Effective date: 20090402

REG Reference to a national code

Ref country code: DE

Ref legal event code: R003

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 20120810