Projection system for a vehicle, vehicle and method for operating a projection system

Abstract

The invention relates to a projection system for a vehicle, comprising a light source and a switching device arranged downstream of the light source, in which switching device a plurality of optical elements which exert different effects on the propagation direction of the light are arranged, the switching device is configured to switch one of the plurality of optical devices into the light path of the light source so that projection images can be projected in different directions by the projection system. The invention further relates to a vehicle and to a method for operating a projection system according to the invention.

Description

Technical Field

[0001] The invention relates to a projection system for a vehicle, a vehicle and a method for operating a projection system. Background Art

[0002] Projection devices are now commonly used in vehicles, such as light signal devices for projecting light signals onto the road surface, head-up displays (HUDs) for projecting information onto the windshield, and projectors for projecting infotainment content into the interior space.

[0003] However, the known projection device can only project the display content to one position. If an image is to be additionally projected at a different position, another projection device needs to be installed on the vehicle. This undoubtedly leads to an increase in manufacturing costs. Summary of the invention

[0004] The object of the present invention is to provide a projection system for a vehicle, which can project a projection image in different directions through one projection system.

[0005] A first aspect of the present invention relates to a projection system for a vehicle, the projection system comprising:

[0006] a light source; and

[0007] A switching device is arranged downstream of the light source, in which a plurality of optical devices for exerting different effects on the propagation direction of light are arranged, and the switching device is configured to switch one of the plurality of optical devices into the light path of the light source, so that a projection image can be projected in different directions through the projection system.

[0008] According to the present invention, a plurality of optical devices that exert different effects on the propagation direction of light are respectively switched into the light path of the light source through a switching device, so that the propagation direction of light from the light source can be changed differently, thereby realizing projection of a projection image in different directions with the aid of only one projection system.

[0009] In the projection system according to the present invention, it is only necessary to arrange a switching device having multiple optical devices that exert different effects on the propagation direction of light downstream of a common light source or projection device, especially a slide projector or a projector. There is no need to increase the projection system or projection device for projection in another direction. Therefore, the projection direction can be advantageously changed or even the number of projected images can be increased without significantly increasing the manufacturing cost, which can advantageously save vehicle manufacturing costs, reduce the installation space for the projection device, and simplify vehicle assembly and wiring.

[0010] According to an embodiment of the present invention, the optical device may include at least two of a transmission device, a reflection device and a semi-transmissive and semi-reflective device. Here, the transmission device, the reflection device and the semi-transmissive and semi-reflective device can respectively exert a transmission effect (i.e., without changing the propagation direction of the light), a reflection effect, and a partial transmission and partial reflection effect on the propagation direction of the light from the light source.

[0011] Here, for example, the switching device can be used to place one of the transmission device and the reflection device in the light path of the light source, so that the light source can project along its own projection direction or can be projected by reflection from the reflection device, so that there are two different projection directions for the projection system, and these two projection directions can be selected by the switching device. In both projection directions, images can be projected with nearly full light efficiency of the light source, which is beneficial to the brightness and color performance of the projected image.

[0012] Particularly preferably, a semi-transmissive and semi-reflective device is used as the optical device, so that images can be projected simultaneously in two different projection directions, further optimizing the functional integration of the projection system.

[0013] It should be noted that the transmission device can adopt a variety of different structural schemes, such as flat glass, a plate with a hollow portion corresponding to the projection area or the projection image, glass covered with a display film corresponding to the projection area or the projection image, or a switching area without any structural components in order to improve the transmittance. Here, the glass includes inorganic glass with silicate non-metallic materials as the main material or transparent plastic with high visible light transmittance.

[0014] According to an embodiment of the present invention, in the switching device, the plurality of optical devices can be driven by a first rotating mechanism, a second rotating mechanism or a reciprocating translation mechanism. That is, different types of switching modes can be considered in the present invention, that is, the plurality of optical devices can be moved into the light path of the light source by rotation or translation in the switching device.

[0015] According to an advantageous embodiment of the present invention, the moving direction of the reciprocating translation mechanism can be oriented obliquely to the emission direction of the light source, and the reciprocating translation mechanism can be used to translate one of the multiple optical devices arranged side by side into the light path of the light source. Here, the multiple optical devices can be arranged in succession in the moving direction of the reciprocating translation mechanism, and the required optical device can be placed in the light path of the light source through the translation movement of the reciprocating translation mechanism. The reciprocating translation mechanism can be, for example, a motor-driven ball screw or a gear rack mechanism. Here, in order to reflect the light from the light source to another direction, the moving direction of the reciprocating translation mechanism is oriented obliquely to the emission direction of the light source, and in particular, the angle between the moving direction and the emission direction can be, for example, 30° to 60°, in particular 45°. In addition, the number of optical devices can be two, three, four, five or more.

[0016] According to an advantageous embodiment of the present invention, the first rotation axis of the first rotating mechanism can be oriented obliquely to the emission direction of the light source, and the first rotating mechanism can be used to rotate one of the multiple optical devices coplanarly distributed around the first rotation axis into the light path of the light source. Here, the multiple optical devices can be distributed in the same plane around the first rotation axis of the first rotating mechanism in a blade-like manner. During the rotation of the first rotating mechanism, one of the multiple optical devices can be placed in the light path to the light source. In particular, it is also conceivable to process the multiple optical devices on a disk-shaped glass, so that the assembly of the multiple optical devices and the first rotating mechanism can be simplified and stable rotation is facilitated. Here, in order to reflect the light from the light source to another direction, the first rotation axis of the first rotating mechanism is oriented obliquely to the emission direction of the light source, and in particular, the angle between the extension direction of the first rotation axis and the emission direction can be, for example, 30° to 60°, in particular 45°. In addition, the number of optical devices can be two, three, four, five or more.

[0017] According to an advantageous embodiment of the present invention, the second rotation axis of the second rotation mechanism can be oriented perpendicular to the emission direction of the light source, and the second rotation mechanism can be used to rotate one of the multiple optical devices respectively arranged along the radial direction of the second rotation axis into the light path of the light source. Here, the multiple optical devices are distributed around the second rotation axis in an eccentric manner and the planes of the multiple optical devices are arranged along the radial direction of the second rotation axis. During the rotation of the second rotation mechanism, one of the multiple optical devices can be placed in the light path to the light source. Here, in order for the multiple optical devices not to interfere with each other, the number of optical devices can be two or three. In order to simplify the assembly of the optical devices, it can be considered to weld, glue, injection mold or insert the multiple optical devices into the second rotation axis through a mortise and tenon structure.

[0018] According to an advantageous embodiment of the present invention, the switching device may include a limiting mechanism or a locking mechanism. In order to maintain the stability of the projected image during the driving process of the vehicle, the switching device may be equipped with a limiting mechanism or a locking mechanism. Here, a mechanical limiting mechanism may be used, in particular a stopper, a slot, a clamping device, a locking device, etc., acting on the periphery of the optical device, or a ratchet pawl device, a keyway, etc. acting on the first rotating shaft or the second rotating shaft. However, an electromechanical brake or a holding brake may also be used on the first rotating shaft or the second rotating shaft. It is particularly advantageous to use a servo motor or a stepper motor for driving to improve the positioning accuracy of the switching device.

[0019] According to an embodiment of the present invention, the light source can be a monochromatic or polychromatic light emitting element, and a hollow portion or a display film corresponding to the projected image can be provided on the plurality of optical devices. This embodiment can achieve the greatest possible cost savings. Here, only monochromatic or polychromatic light emitting elements, in particular LEDs, are used for projection. In order to present the projected image, a hollow portion or a display film, in particular a colored display film, is constructed on the plurality of optical devices. The projection system according to the present invention is thus manufactured using low-cost components.

[0020] According to an advantageous embodiment of the present invention, the light source may be a slide projector or a projector. The slide projector may include, for example, a direct-projection slide projector and a reflective-projection slide projector, which can magnify and project transparent slides or opaque images using the convex lens imaging principle; the projector may include, for example, a TFT-LCD (Thin Film Transistor Liquid Crystal Display) projector, a DLP (Digital Light Processing) projector, a laser scanning projector, and an LCOS (Liquid Crystal on Silicon) projector, which can project digital images, thereby being able to change the projected images according to the scene.

[0021] According to an advantageous embodiment of the present invention, the projected image may include at least one of a logo, a pattern, a character, a line and a dynamic picture.

[0022] According to a particularly advantageous embodiment of the invention, the sign may include one or more of a front position light sign, a side marker light sign, a rear position light sign, a turn signal sign, a brake light sign, a reversing light sign, a fog light sign, a hazard warning flasher sign, a parking light sign, a daytime running light sign, an automatic driving sign, a manufacturer's trademark or a vehicle model logo. Thus, with the projection system according to the invention, a light signal indicating the presence of a vehicle or a change in the movement state of the vehicle can be projected, in particular as described below, toward the road surface around the vehicle.

[0023] According to an advantageous embodiment of the present invention, the projection system can be arranged in or on the vehicle body, in particular, in or on the radiator grille, vehicle logo, anti-collision beam, vehicle lamp, exterior mirror, tailgate, so as to project the projection image onto the road surface around the vehicle or onto the vehicle body. With this embodiment, for example, in combination with the aforementioned embodiment, a light signal indicating the presence of the vehicle or the change of the motion state can be projected toward the road surface around the vehicle, thereby further adding to the existing vehicle lamp system to signal the presence of the vehicle and the change of the motion state to traffic participants, thereby improving traffic safety.

[0024] According to an advantageous implementation form of the present invention, the projection system can be arranged in the interior space of the vehicle, in particular, in the main instrument panel, the auxiliary instrument panel, the top instrument panel, the ceiling, and the B-pillar, so as to project the projection image onto the vehicle windows (such as the front and rear windshields, the side windows), the ceiling, the main instrument panel, the back of the seat, or the ground in the door opening area. Thus, the information display and entertainment functions in the vehicle are further optimized, and the driving experience of the vehicle users is enriched.

[0025] According to an advantageous embodiment of the present invention, an optical component is provided downstream of the switching device, in particular a plane mirror, a concave mirror, a convex mirror or a prism, in particular an isosceles prism, a Dove prism, a pentagonal prism, a rhombus prism, a Schmidt prism, etc. This can further improve the projection position of the image, scale the image size, or realize rotation or mirroring of the image.

[0026] A second aspect of the invention relates to a vehicle comprising a projection system according to the invention.

[0027] A third aspect of the invention relates to a method for operating a projection system according to the invention, wherein one of a plurality of optical elements in a switching device of the projection system is switched into the beam path of a light source depending on a vehicle state and / or in response to a maneuver of the vehicle.

[0028] For example, when the vehicle is in the startup state and / or driving state, the optical device (i.e., a semi-transmissive and semi-reflective device) in the switching device of the projection system that applies transmission and reflection effects to the propagation direction of light can be switched to the light path of the light source, so that two light bands extending in the longitudinal direction of the vehicle can be projected on the road surface in front of or behind the vehicle, and the width of the vehicle body can be characterized by the interval between the two light bands. Here, the light band projected in this way can be called a front clearance light sign / front position light sign or a rear clearance light sign / rear position light sign. Through such a projected image, the presence of the vehicle and its body width can be indicated to the driver and / or other traffic participants.

[0029] For example, when a vehicle is turned or a turn signal on the vehicle body is triggered, an optical device (i.e., a transmission device or a reflection device) in a switching device of the projection system that applies a transmission or reflection effect to the propagation direction of light is switched into the light path of the light source, thereby projecting a turn signal sign onto the road surface on the turning side to indicate the vehicle's turning operation to other traffic participants.

[0030] According to an advantageous embodiment of the present invention, the projection system can project the projection image continuously, flickeringly, gradually (ie gradually brighter or darker), or with a color change, thereby achieving richer light effects.

[0031] In the present invention, functions, effects or advantages described for one aspect are applicable to other aspects of the present invention in a corresponding manner, and vice versa.

[0032] Other features of the present invention are derived from the specific embodiments and the drawings. All the features and feature combinations mentioned above in the specification and the features and feature combinations mentioned below in the specific embodiments and / or shown separately in the drawings can be used not only in the corresponding given combination, but also in other combinations, or can be used alone. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 shows a greatly simplified schematic diagram of a projection system according to the invention for a vehicle;

[0034] Figure 2 A schematic diagram showing a projection system for a vehicle in a state according to a first embodiment of the present invention;

[0035] Figure 3 A schematic diagram showing a projection system for a vehicle according to a first embodiment of the present invention in another state;

[0036] Figure 4 A schematic diagram showing a switching device for a projection system for a vehicle according to a first embodiment of the present invention;

[0037] Figure 5 A schematic diagram showing a projection system for a vehicle according to a second embodiment of the present invention;

[0038] Figure 6 A schematic diagram showing a switching device for a projection system of a vehicle according to a second embodiment of the present invention;

[0039] Figure 7 Another schematic diagram showing a switching device for a projection system of a vehicle according to a second embodiment of the present invention;

[0040] Figure 8 A schematic diagram showing a projection system for a vehicle according to a third embodiment of the present invention;

[0041] Fig. 9 A schematic diagram showing a switching device for a projection system for a vehicle according to a third embodiment of the present invention;

[0042] Fig.10 The configuration of the projection system according to the present invention on a vehicle and the corresponding projection image are shown;

[0043] Fig.11 Another arrangement of the projection system according to the present invention on a vehicle and a corresponding projection image are shown;

[0044] Fig.12 Another arrangement of the projection system according to the present invention on a vehicle and a corresponding projected image are shown; and

[0045] Fig.13 The arrangement of a projection system according to the invention in the interior of a vehicle and the corresponding projection images are shown. DETAILED DESCRIPTION

[0046] Figure 1 A greatly simplified schematic diagram of a projection system for a vehicle according to an exemplary embodiment of the present invention is shown. Figure 1 The projection system 1 for a vehicle shown in the figure comprises: a light source 2 and a switching device 3 arranged downstream of the light source, in which a plurality of optical devices 4 (not shown in detail) that exert different effects on the propagation direction of light are arranged, and the switching device 3 is configured to switch one of the plurality of optical devices 4 into the light path of the light source, so that a projection image can be projected in different directions through the projection system 1.

[0047] exist Figure 1In the figure, the switching device 3 and the multiple optical devices 4 therein and the projection direction of the image are only schematically shown, so as to explain that the multiple optical devices 4 that exert different effects on the propagation direction of light are changed by the switching device 3 and switched to the light path (indicated by dot-dash lines) of the light source 2 or act on the light path of the light source 2, so that the propagation direction of the light from the light source 2 can be changed differently, so that the projection image can be projected in different directions by means of only one projection system 1. For this reason, there is no need to add a projection system or a projection device for projection in another direction, so that the projection direction can be advantageously changed or even the number of projected images can be increased without significantly increasing the manufacturing cost, which can advantageously save the vehicle manufacturing cost, reduce the installation space of the projection device, and simplify the vehicle assembly and wiring.

[0048] like Figure 1 As shown in an exemplary manner, the light from the light source 2 can be directly projected onto the surface aligned with the light source via the switching device 3, thereby forming a first projection image F1; and the light from the light source 2 can also be optionally projected onto another surface via the switching device 3, thereby forming a second projection image F2. In particular, the first projection image F1 and the second projection image F2 can be located at different positions in space in a mirror-symmetrical manner. It should be noted that the second projection image F2 is indicated by hatching. Figure 1 The figure shows the situation when viewed from the back side.

[0049] Particularly preferably, the optical device 4 may include at least two of a transmissive device, a reflective device, and a semi-transmissive and semi-reflective device. Particularly preferably, in the switching device 3, the plurality of optical devices 4 are driven by a first rotating mechanism 32, a second rotating mechanism 33, or a reciprocating translation mechanism 31. This will be described in detail in conjunction with the following embodiments.

[0050] Figure 2 FIG. 2 is a schematic diagram showing a projection system for a vehicle in a state according to a first embodiment of the present invention, and FIG. Figure 3 A schematic diagram showing the projection system for a vehicle according to the first embodiment of the present invention in another state.

[0051] exist Figure 2 In the embodiment, the plurality of optical devices 4 include a transmission device 41 and a reflection device 42. The transmission device 41 and the reflection device 42 are arranged side by side and driven together by a reciprocating translation mechanism 31 which is not shown in detail. Figure 2 and 3 The moving direction L of the reciprocating translation mechanism 31 is schematically marked with a double arrow, which means that the reciprocating translation mechanism 31 can drive the transmission device 41 and the reflection device 42 along the arrow direction on one side, and can also drive the transmission device 41 and the reflection device 42 along the arrow direction on the other side.

[0052] Currently in Figure 2 In the embodiment, the reflective device 42 is switched to the optical path of the light source 2. Here, the moving direction L of the reciprocating translation mechanism 31 is oriented obliquely to the emission direction P of the light source 2. Such an inclined setting enables the reflective device 42 to reflect the light from the light source 2 in directions other than the emission direction P. Here, the reflective device 42 will prevent the transmission of the light from the light source 2, thereby Figure 2 In this case, only the second projection image F2 appears. Exemplarily, the angle a between the moving direction L and the emission direction P can be, for example, 30° to 60°, in particular 45°.

[0053] from Figure 2 Starting from the state shown in FIG. 1 , the reciprocating translation mechanism 31 moves the transmission device 41 and the reflection device 42 obliquely upward along the movement direction L, so that the transmission device 41 is switched to the light path of the light source 2, see FIG. Figure 3 Thus, the light from the light source 2 will be transmitted through the transmission device 41 and projected as the first projection image F1. Here, the transmission device can adopt a variety of different structural schemes, such as Figure 3 The shown flat glass, a plate with a hollow portion corresponding to the projection area or the projection image, glass covered with a display film corresponding to the projection image, or a switching area without any structural components (i.e., it is empty at the position shown by the transmission device 41) in order to improve the transmittance.

[0054] Figure 4 The schematic diagram of the switching device of the projection system for a vehicle according to the first embodiment of the present invention is shown. The reciprocating translation mechanism 31 is configured as two ball screws driven by a motor. The transmission component 41 and the reflection component 42 are fixed side by side on the two ball screws. Thus, the transmission component 41 and the reflection component 42 are driven to reciprocate along the moving direction L by the rotation of the screw. Figures 2 to 4 In the case shown in FIG. 8 , the number of the optical devices 4 may also be three, four, five or more.

[0055] Figure 5 FIG. 2 shows a schematic diagram of a projection system for a vehicle according to a second embodiment of the present invention. Here, a plurality of optical devices 4 are driven by a first rotating mechanism 32. The optical devices 4 are coplanarly distributed around a first rotation axis 52 of the first rotating mechanism 32. Figure 5Only the reflective device 42 and the semi-transparent and semi-reflective device 43 can be seen in the cross section of the switching device 3. Here, the first rotation axis 52 of the first rotating mechanism 32 is also oriented obliquely to the emission direction P of the light source 2, so that the reflective device 42 and the semi-transparent and semi-reflective device 43 can reflect the light from the light source 2 to a direction other than the emission direction P. By rotating the first rotating mechanism 32 along the first rotation direction D1, one of the multiple optical devices 4 coplanarly distributed around the first rotation axis 52 can be rotated into the light path of the light source 2, so that the first projection image F1 and the second projection image F2 can be projected in different directions. Exemplarily, the angle b between the extension direction of the first rotation axis 52 and the emission direction P of the light source 2 can be, for example, 30° to 60°, in particular 45°.

[0056] In the second embodiment, it is particularly advantageous to use a semi-transmissive and semi-reflective device 43 as the optical device 4 , so that the first projected image F1 and the second projected image F2 can be simultaneously projected in two different directions, further optimizing the functional integration of the projection system 1 .

[0057] Figure 6 A schematic diagram of a switching device for a projection system for a vehicle according to a second embodiment of the present invention is shown. In the switching device 3, a total of four optical devices 4 are distributed in a blade-like manner in the same plane around the first rotation axis 52 of the first rotating mechanism 32. The optical device 4 includes a transmission device 41, a reflection device 42 and a semi-transmissive and semi-reflective device 43. Different optical devices 4 are connected to the first rotation axis 52 by supporting rods, so that during the rotation of the first rotating mechanism 32 along the first rotation direction D1, these optical devices can be placed in the light path to the light source 2 respectively.

[0058] Figure 7 Another schematic diagram of a switching device for a projection system for a vehicle according to a second embodiment of the present invention is shown, wherein the plurality of optical devices 4, namely the transmission device 41, the reflection device 42 and the semi-transmission and semi-reflection device 43, are processed on a disk-shaped glass 44, thereby simplifying the assembly of the plurality of optical devices 4 and the first rotating mechanism 32 and facilitating stable rotation.

[0059] besides, Figure 6 and 7 A particularly cost-effective embodiment is also shown. Here, the light source 2 can be only a single-color or multi-color light-emitting element. Figure 6 and 7The optical devices 4 shown are respectively provided with display films corresponding to the projected images (here, the logo). Here, for the sake of clarity, the periphery of the logo is not filled with color. It should be understood that the area around the logo can be shielded by the display film, so that only the area shown in white can exert its effect on the propagation direction of light. For example, in the transmission device 41, only the area of ​​the left-turn arrow shown in white can transmit light; in the reflection device 42, only the area of ​​the left-turn arrow shown in white can reflect light; in the remaining two semi-transmissive and semi-reflective devices 43, only the areas of the left-turn arrow and the exclamation mark shown in white can allow light to be partially transmitted and partially reflected. Particularly advantageously, the display film can be implemented in color, so that a colored projection image, especially a projection image of different colors, can be presented only by the white light source 2 and the switching device 3. Not limited to Figure 6 and 7 In the case shown, the number of optical devices can be two, three, five or more.

[0060] Figure 8 A schematic diagram of a projection system for a vehicle according to a third embodiment of the present invention is shown. Here, three optical devices 4 are driven by a second rotating mechanism 33. These optical devices 4 are arranged spaced apart from each other along the radial direction of the second rotation axis 53 of the second rotating mechanism 33. Here, the three optical devices include a transmission device 41, a reflection device 42 and a semi-transmissive and semi-reflective device 43, respectively. The second rotation axis 53 of the second rotating mechanism 33 is oriented perpendicular to the emission direction P of the light source. By rotating the second rotating mechanism 33 along the second rotation direction D2, it is possible to rotate one of these optical devices into the light path of the light source 2. Here, in order that the multiple optical devices 4 do not interfere with each other, the number of optical devices 4 can be two or three.

[0061] Fig. 9 A schematic diagram of a switching device for a projection system for a vehicle according to a third embodiment of the present invention is shown. In the switching device, the transmission device 41, the reflection device 42 and the semi-transmissive and semi-reflective device 43 are unequally distributed around the second rotation axis 53 and the planes of these optical devices 4 are arranged along the radial direction of the second rotation axis 53. The transmission device 41, the reflection device 42 and the semi-transmissive and semi-reflective device 43 are spaced 120° apart from each other, for example. In order to simplify the assembly of the optical devices, it is conceivable to weld, glue, injection mold or insert these optical devices 4 onto the second rotation axis 53 through a mortise and tenon structure. In addition, as Fig. 9 The transmissive element 41, the reflective element 42 and the transflective element 43 shown are all designed without markings over the entire surface. Accordingly, a light source 2 designed as a slide projector or overhead projector can be advantageously used to project projection images of different shapes and / or different colors.

[0062] In addition or alternatively to the above embodiments, it is also possible to consider providing the switching device with a limit mechanism or a locking mechanism to keep the projected image stable during the driving of the vehicle. In addition, an optical component, in particular a plane mirror, a concave mirror, a convex mirror or a prism, can be provided downstream of the switching device to further improve the projection position of the image, scale the image size or realize the rotation or mirroring of the image.

[0063] Fig.10 The projection system 1 according to the present invention is arranged on a vehicle and the corresponding projection images are shown. Here, the projection system 1 can be arranged, for example, in a radiator grille, a vehicle logo, or an anti-collision beam of a vehicle V, and projects a first projection image F1 and a second projection image F2 in two different directions toward the road surface in front of the vehicle. Here, the first projection image F1 and the second projection image F2 are respectively a left turn signal sign and a right turn signal sign. In the projection system 1, for example, Figure 6 and 7 The transmission device 41 shown in FIG. 1 is rotated into the light path of the light source 2 to project only the left turn signal sign; Figure 6 and 7 The reflector 42 shown in FIG. 1 is rotated into the light path of the light source 2 to project only the right turn signal sign; Figure 6 and 7 The semi-transparent and semi-reflective device 43 with the left turn sign is rotated into the optical path of the light source 2 to simultaneously project the left turn signal sign and the right turn signal sign. Thus, the projection system according to the present invention can not only project projection images individually in different directions but also project two projection images simultaneously in different directions. It is also particularly preferred that the projection of the left turn signal sign, the right turn signal sign and the simultaneous projection of the two can be implemented in response to the left and right steering operations of the vehicle (or the triggering of the left and right turn signals) and the triggering of the hazard warning flashers. In particular, the projection of the left turn signal sign and / or the right turn signal sign can be performed in a flashing manner.

[0064] Fig.11 FIG. 2 shows another arrangement of the projection system according to the present invention on a vehicle and a corresponding projection image. Here, the projection system 1 can be arranged in, for example, a radiator grille, a vehicle logo, or an anti-collision beam of a vehicle V, and simultaneously projects two light strips extending in the longitudinal direction of the vehicle in two different directions toward the road surface in front of the vehicle, namely, Fig.11The first projection image F1 and the second projection image F2 are shown in FIG. Here, the first projection image F1 and the second projection image F2 are used as front clearance lamp signs / front position lamp signs to indicate the presence of the vehicle and its body width to the driver and / or other traffic participants. In addition, another projection system 1' can be set in the tailgate, vehicle logo or anti-collision beam of the vehicle, for example, and simultaneously projects two light strips extending in the longitudinal direction of the vehicle in two different directions toward the road surface behind the vehicle, i.e. Fig.11 Another first projection image F1' and another second projection image F2' are shown in the figure, which are used as rear clearance light markers / rear position light markers to indicate the presence of the vehicle and its body width to other traffic participants. Here, the front clearance light marker / front position light marker or the rear clearance light marker / rear position light marker can be projected, for example, when the vehicle is in the starting state and / or in the driving state.

[0065] Fig.12 Another arrangement of the projection system according to the present invention on a vehicle and the corresponding projection image are shown. Here, the projection system 1 and another projection system 1' are respectively arranged in the exterior rearview mirrors on the left and right sides of the vehicle V, and the two projection systems can respectively project one or two turn signal signs toward the lateral road surface of the vehicle. Similarly, the left turn signal sign and the right turn signal sign can be projected, especially flashingly projected, in response to the left and right steering operations of the vehicle or the triggering of the left and right turn signals.

[0066] Fig.13 The arrangement of the projection system according to the present invention in the interior space of a vehicle and the corresponding projection images are shown. Here, the projection system 1 is arranged in the auxiliary dashboard or the ceiling and projects the first projection image F1 and the second projection image F2 toward the front and rear windshields. In particular, in response to the operation of the vehicle user, the projection can be performed only toward one of the front and rear windshields or toward both the front and rear windshields.

[0067] The present invention may also be a computer program product. The computer program product may include a computer-readable storage medium having computer-readable program instructions thereon for causing a processor to execute various aspects of the present invention.

[0068] A computer readable storage medium may be a tangible device that can retain and store instructions for use by an instruction execution device. A computer readable storage medium may be, for example but not limited to, an electronic storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing.

[0069] The computer readable program instructions may be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In some embodiments, electronic circuit systems including, for example, programmable logic circuit systems, field programmable gate arrays (FPGAs), or programmable logic arrays (PLAs) may execute computer readable program instructions by utilizing state information of the computer readable program instructions of the personalized electronic circuit systems to perform various aspects of the present invention.

[0070] The present invention is not limited to the embodiments shown, but includes or extends to all technical equivalents that may fall within the effective scope of the appended claims. The position descriptions selected in the specification, such as top, bottom, left, right, etc., refer to the direct description and the drawings shown and can be transferred to the new position according to the meaning when the position changes.

[0071] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A projection system for a vehicle, the projection system comprising: A light source; It is characterized in that The projection system includes a switching device arranged downstream of the light source, in which a plurality of optical devices that exert different effects on the propagation direction of light are arranged. The switching device is configured to switch one of the plurality of optical devices into the light path of the light source, so that a projection image can be projected in different directions through the projection system.

2. The projection system according to claim 1, characterized in that The optical device includes at least two of a transmissive device, a reflective device and a semi-transmissive and semi-reflective device.

3. The projection system according to claim 1 or 2, characterized in that In the switching device, the plurality of optical devices are driven by a first rotating mechanism, a second rotating mechanism or a reciprocating translation mechanism.

4. The projection system according to claim 3, characterized in that The moving direction of the reciprocating translation mechanism is oriented obliquely to the emission direction of the light source, and the reciprocating translation mechanism can be used to translate one of the plurality of optical devices arranged side by side into the light path of the light source.

5. The projection system according to claim 3, characterized in that The first rotation axis of the first rotation mechanism is oriented obliquely to the emission direction of the light source. The first rotation mechanism can be used to rotate one of the plurality of optical devices coplanarly distributed around the first rotation axis into the light path of the light source.

6. The projection system according to claim 3, characterized in that The second rotation axis of the second rotation mechanism is oriented perpendicularly to the emission direction of the light source, and the second rotation mechanism can be used to rotate one of the plurality of optical components respectively arranged along the radial direction of the second rotation axis into the light path of the light source.

7. The projection system according to any one of claims 1 to 6, characterized in that The switching device includes a limiting mechanism or a locking mechanism.

8. The projection system according to any one of claims 1 to 7, characterized in that The light source is a monochromatic or multi-color light emitting element, and a hollow portion or a display film corresponding to the projection image is provided on the plurality of optical devices; or the light source is a slide projector or a projector.

9. The projection system according to any one of claims 1 to 8, characterized in that The projected image includes at least one of a logo, a character, a line, a pattern and a dynamic picture.

10. The projection system according to claim 9, characterized in that The signs include one or more of front marker light signs, side marker light signs, rear marker light signs, turn signal signs, brake light signs, reversing light signs, fog light signs, hazard warning flasher signs, parking light signs, daytime running light signs, automatic driving signs, manufacturer trademarks and vehicle model logos.

11. The projection system according to any one of claims 1 to 10, characterized in that The projection system is arranged in or on the vehicle body, in particular, in or on the radiator grille, vehicle logo, anti-collision beam, headlight, exterior rearview mirror, tailgate, so as to project the projection image onto the road surface around the vehicle or on the vehicle body; and / or The projection system is arranged in the interior space of the vehicle, in particular, in the main instrument panel, the auxiliary instrument panel, the top instrument panel, the ceiling, and the B-pillar, so as to project the projection image onto the window, the ceiling, the main instrument panel, the back of the seat or the ground in the door opening area.

12. The projection system according to any one of claims 1 to 11, characterized in that An optical component, in particular a plane mirror, a concave mirror, a convex mirror or a prism, is arranged downstream of the switching device.

13. A vehicle, characterized in that The vehicle comprises a projection system according to one of claims 1 to 12.

14. Method for operating a projection system according to one of claims 1 to 12, characterized in that Depending on the vehicle state and / or in response to maneuvering of the vehicle, one of a plurality of optical devices in a switching device of the projection system is switched into the light path of the light source.

15. The method according to claim 14, characterized in that The projection system projects the projection image continuously, flashingly, gradually or with changing colors.

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