Light guide plate, lighting and / or signaling device and motor vehicle

Abstract

A light guide plate, a light patterning assembly, an illumination and / or signal indicating device, and a motor vehicle are disclosed. The light guide plate comprises a light incident surface for receiving incident light, a first set of pattern units arranged in a first pattern, each pattern unit of the first set of pattern units comprising a first light deflecting portion arranged to deflect light incident from the light incident surface into the light guide plate in a first direction out of the light guide plate to form a first spatial image, and a second set of pattern units arranged in a second pattern, each pattern unit of the second set of pattern units comprising a second light deflecting portion arranged to deflect light incident from the light incident surface into the light guide plate in a second direction different from the first direction out of the light guide plate to form a second spatial image.

Description

Technical Field

[0001] This invention relates to a light guide plate, a lighting and / or signal indicating device, and a motor vehicle. Background Technology

[0002] In many fields, various lighting or signaling devices are known for providing light for illumination or signaling. For example, in motor vehicles, headlights are used to provide illumination or signaling functions inside or outside the vehicle to ensure safe driving; or, lights with functions such as illumination, signaling, and ambient decoration are installed inside or outside spaces such as cabins, engine rooms, buildings, and rooms.

[0003] With technological advancements and increasing personalized needs, lighting and signaling devices also need to consider visual effects. For example, the beams emitted by vehicle headlights can display patterns to represent certain information or symbols, or headlights can increase the attention of pedestrians or drivers through special display effects (such as dynamic patterns or patterns with specific rules). Summary of the Invention

[0004] The purpose of this invention is to provide a light guide plate, a lighting and / or signal indicating device, and a motor vehicle. The light guide plate is capable of displaying patterns with three-dimensional or dynamic effects under illumination.

[0005] According to one aspect of the present invention, a light guide plate is provided, comprising: a light incident surface for receiving incident light; a first group of pattern units arranged in a first pattern, each pattern unit in the first group of pattern units including a first light deflection portion, the first light deflection portion being arranged to deflect light incident on the light guide plate from the light incident surface toward a first direction and exit the light guide plate to form a first spatial image; and a second group of pattern units arranged in a second pattern, each pattern unit in the second group of pattern units including a second light deflection portion, the second light deflection portion being arranged to deflect light incident on the light guide plate from the light incident surface toward a second direction different from the first direction and exit the light guide plate to form a second spatial image.

[0006] In one embodiment, the first spatial image and the second spatial image are formed based on light incident from the same position on the light incident surface.

[0007] In one embodiment, the first pattern and the second pattern are parallel to each other and offset in a direction parallel to the light emitting surface.

[0008] In one embodiment, the first light deflection section and the second light deflection section include microprisms disposed on the side of the light guide plate opposite to the light emitting surface.

[0009] In one embodiment, the light guide plate has a flat shape, the light incident surface of the light guide plate is located at the side of the light guide plate, the light emitting surface of the light guide plate is located at the top or bottom of the light guide plate, the microprism in the first light deflection part has a first prism surface, the microprism in the second light deflection part has a second prism surface, the projection of the normal of the first prism surface onto the reference plane is not parallel to the projection of the normal of the second prism surface onto the reference plane, and the reference plane is a plane perpendicular to the light emitting surface of the light guide plate.

[0010] In one embodiment, the projection of the normal of the first prism surface onto the reference plane forms an angle of 20 to 80 degrees with the projection of the normal of the second prism surface onto the reference plane.

[0011] In one embodiment, the first prism surfaces in each pattern unit of the first group of pattern units are parallel to each other, and the second prism surfaces in each pattern unit of the second group of pattern units are parallel to each other.

[0012] In one embodiment, the light guide plate further includes a third set of pattern units, which are arranged in a third pattern. Each pattern unit in the third set of pattern units includes a third light deflection part, which is arranged to deflect light incident on the light guide plate from the light incident surface into a third direction and exit the light guide plate to form a third spatial image. The third direction is different from both the first and second directions. The deflection angle of the second light deflection part is between the deflection angle of the first light deflection part and the deflection angle of the third light deflection part.

[0013] In one embodiment, the third light deflection section includes a microprism disposed on the side of the light guide plate opposite to the light emitting surface. The microprism in the third light deflection section has a third prism surface. The angle formed by the projection of the normal of the second prism surface onto the reference plane and the projection of the normal of the first prism surface onto the reference plane, and the angle formed by the projection of the normal of the second prism surface onto the reference plane and the projection of the normal of the third prism surface onto the reference plane, are both smaller than the angle formed by the projection of the normal of the first prism surface onto the reference plane and the projection of the normal of the third prism surface onto the reference plane.

[0014] In one embodiment, the first pattern, the second pattern, and the third pattern are three consecutive frames of a dynamic pattern.

[0015] In one embodiment, the third prism surfaces in each pattern unit of the third group of pattern units are parallel to each other.

[0016] In one embodiment, both the first pattern and the second pattern have converging ends facing the light incident surface.

[0017] In one embodiment, the observable areas of the first spatial image and the second spatial image may partially overlap or not overlap.

[0018] According to another aspect of the present invention, a light patterning component is also provided, comprising:

[0019] A light guide plate according to any embodiment of the present invention; and a light source that emits light toward the light incident surface.

[0020] In one embodiment, both the first spatial image and the second spatial image are formed by light emitted from a single light source.

[0021] According to another aspect of the present invention, a lighting and / or signal indicating device is also provided, comprising: a light guide plate according to any embodiment of the present invention or a light patterning component according to any embodiment of the present invention.

[0022] According to another aspect of the present invention, a motor vehicle is also provided, including a light guide plate according to any embodiment of the present invention, a light patterning component according to any embodiment of the present invention, or a lighting and / or signal indicating device according to any embodiment of the present invention. Attached Figure Description

[0023] Figure 1 A schematic diagram of a light guide plate according to an embodiment of the present invention is shown.

[0024] Figure 2 A schematic diagram of a light patterning component according to an embodiment of the present invention is shown.

[0025] Figure 3 Show Figure 1 The enlarged view of the light guide plate shown illustrates the patterned units on the light guide plate.

[0026] Figure 4 A partial cross-sectional schematic diagram of a set of patterned units on a light guide plate according to an embodiment of the present invention is shown.

[0027] Figure 5 The positional relationship between the first prism surface in the first group of pattern units, the second prism surface in the second group of pattern units, and the third prism surface in the third group of pattern units on a light guide plate according to an embodiment of the present invention is shown.

[0028] Figure 6 The observable areas of different spatial images formed by different groups of patterns on a light guide plate according to an embodiment of the present invention are shown.

[0029] Figure 7A schematic diagram is shown showing the deflection of light by a first light deflection portion in a first group of patterned units, a second light deflection portion in a second group of patterned units, and a third light deflection portion in a third group of patterned units on a light guide plate according to an embodiment of the present invention, in a reference plane perpendicular to the light emitting surface of the light guide plate. Detailed Implementation

[0030] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. In this specification, the same or similar reference numerals denote the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the overall inventive concept of the present invention and should not be construed as a limitation thereof.

[0031] Furthermore, in the following detailed description, numerous specific details are set forth for ease of explanation to provide a thorough understanding of the embodiments disclosed herein. However, it will be apparent that one or more embodiments may be practiced without these specific details.

[0032] Figure 1 A light guide plate 100 according to an embodiment of the present invention is shown. The light guide plate 100 has a light incident surface 10. The light incident surface 10 is used to receive incident light. The incident light is, for example, from a light source 200 outside the light guide plate 100. As an example, the light guide plate 100 may have the shape of a flat plate, i.e., its top and bottom surfaces have a much larger area than its surrounding sides. The light incident surface 10 may be located on the side of the light guide plate 100. Due to the total internal reflection effect, the incident light entering the light guide plate 100 can be continuously reflected by the top and bottom surfaces inside the light guide plate 100, thereby propagating efficiently within the light guide plate 100.

[0033] In an embodiment of the invention, the light guide plate 100 has multiple patterns. Each pattern is composed of a set of pattern units. Figure 1 The example shown includes multiple patterns, each forming an approximately V-shaped outline. The arrangement trajectory of each group of pattern units can consist of one or more straight lines, one or more curves, or a combination of straight lines and curves. For ease of description, two groups of pattern units will be selected below for detailed description.

[0034] As an example, the light guide plate 100 is provided with a first group of pattern units 21 and a second group of pattern units 22. The first group of pattern units 21 are arranged in a first pattern, and the second group of pattern units 22 are arranged in a second pattern. The first group of pattern units 21 and the second group of pattern units 22 are arranged in... Figure 3 In the enlarged image ( Figure 3(A top view) is clearly shown. When the light guide plate 100 is irradiated by incident light, a first spatial image and a second spatial image corresponding to the first pattern and the second pattern, respectively, can be formed. To form such a spatial image, each pattern unit in the first group of pattern units 21 includes a first light deflection part 210, which is arranged to deflect light entering the light guide plate 100 from the light incident surface 10 in a first direction X1 and exit the light guide plate to form the first spatial image. Similarly, each pattern unit in the second group of pattern units 22 includes a second light deflection part 220, which is arranged to deflect light entering the light guide plate 100 from the light incident surface 10 in a second direction X2 and exit the light guide plate 100 to form the second spatial image. Figure 1 In the illustrated embodiment, the light emitting surface 11 is the top surface of the light guide plate 100. Assuming that the light guide plate 100 is placed vertically, the light emitting surface 11 can be considered as being located in a vertical plane, and the plane perpendicular to the light emitting surface 11 can be considered as a horizontal plane.

[0035] A schematic diagram showing the deflection directions of the first light deflecting unit 210 and the second light deflecting unit 220. For clarity, Figure 7 A plane perpendicular to the light-emitting surface 11 is chosen to represent the direction of light deflection; this plane is also referred to herein as the "reference plane," and is an imaginary plane. Assuming the light-emitting surface 11 is a vertical plane, then... Figure 7 The page can be viewed as a horizontal plane or a plane perpendicular to the vertical plane and at a certain angle to the horizontal plane. However, in the embodiment, the deflection of light by the first light deflection unit 210 and the second light deflection unit 220 is not limited to the plane perpendicular to the light emitting surface 11, but may deflect the light to a direction that is neither parallel nor perpendicular to the light emitting surface 11. In this case, Figure 7 The first direction X1' and the second direction X2' shown can be regarded as the propagation directions of the light emitted after being deflected by the first light deflector 210 and the light emitted after being deflected by the second light deflector 220, respectively. Figure 7 The projection of the page onto the plane.

[0036] exist Figure 1In this embodiment, the overall propagation direction of the light incident on the light guide plate 100 is approximately parallel to the light emitting surface 11 of the light guide plate 100. However, for an observer, the observation position is usually located directly in front of or to the side of the light emitting surface 11 of the light guide plate 100. Therefore, when designing the deflection direction of the light deflection section, it is more appropriate to consider the reference plane 12 (i.e., the plane perpendicular to the light emitting surface 11 of the light guide plate 100). It should be noted that there is not only one plane perpendicular to the light emitting surface 11 of the light guide plate 100; the reference plane 12 can be selected from these planes according to actual needs (e.g., the placement direction of the light guide plate, the observer's habits, etc.). Furthermore, if necessary, multiple reference planes 12 can be selected to jointly design the deflection effect of the light deflection section on the light. For ease of illustration, in... Figure 1 In this context, the reference plane 12 is a horizontal plane, but the embodiments of the present invention are not limited to this.

[0037] from Figure 7 As can be seen, since the first direction X1' and the second direction X2' are different, the light beam, after being deflected by the first light deflector 210 and the second light deflector 220, will form the first spatial image and the second spatial image in different angular ranges. As an example, the observable areas of the first spatial image and the second spatial image may partially overlap or not overlap. Specifically, as... Figure 6 As shown, the observable regions 31 and 32 of the first spatial image partially overlap. Thus, the spatial image seen by the human eye differs across different angular ranges. Furthermore, the left and right eyes inherently have different viewing angles. Therefore, different light deflection sections forming patterns within different angular ranges allow the observer to perceive a three-dimensional effect when viewing the spatial image, especially when the first and second patterns are of substantially the same shape and size.

[0038] In one embodiment, such as Figure 1 As shown, the first and second patterns are parallel and offset from each other in a direction parallel to the light emitting surface. This is beneficial for generating better 3D visual effects. Figure 1 In the example shown, the first group of pattern units 21 and the second group of pattern units 22 are each arranged in a V-shaped outline. This allows the observer to perceive a V-shaped image with a three-dimensional effect. In other examples, the image may have other outlines; this application does not impose specific limitations. However, the image preferably has a symmetrical structure and a shape that diverges from the side closest to the incident surface 10 along the direction of light propagation.

[0039] In some embodiments, the function of the light deflection section can be achieved by a microprism. For example, the first light deflection section 210 and the second light deflection section 220 may include a microprism disposed on the side of the light guide plate 100 opposite to the light emitting surface 11, such as... Figure 4 As shown.

[0040] As mentioned earlier, the light guide plate 100 can have a flat shape. For example, the light incident surface 10 of the light guide plate 100 may be located on its side, and the light emitting surface 11 may be located on its top or bottom. It should be noted that the definitions of "top," "bottom," or "side" of the light guide plate 100 are not intended to limit its orientation. Rather, for ease of description, it is customary to describe the positions of the two larger, opposite surfaces of the light guide plate 100 as "top" and "bottom," while the smaller surface extending between the top and bottom is described as "side." In practice, the light guide plate 100 can be placed in any orientation as needed.

[0041] Figure 4 A schematic diagram of the microprisms in the first set of pattern units 21 is shown. Figure 4 The image shown is a cross-sectional view taken along the arrangement trajectory of the first group of pattern units 21. For the microprism, its deflection of the light beam is achieved through the prism surface. The first prism surface 211 of the microprism in the first light deflection section 210 can deflect and reflect the light ray 30 inside the light guide plate to the light exit surface 11. The structures of the other groups of pattern units are similar, only the orientation of the prism surfaces differs. And... Figure 5 The diagram illustrates the positional relationship of the prism faces of the microprisms in different sets of pattern units. It should be understood that when a prism face reflects light, the incident and reflected light are symmetrical with respect to the normal axis of the prism face. Therefore, the normal direction of the prism face can be used as a design reference for the direction of the deflected light. Correspondingly, when considering the deflection direction of the prism face in reference plane 12, the projection of the normal of the prism face onto reference plane 12 can also be used as a design reference.

[0042] exist Figure 5 In the illustrated embodiment, the microprism in the first light deflection section 210 has a first prism surface 211, and the microprism in the second light deflection section 220 has a second prism surface 221. For example... Figure 5As shown, the projection 213 of the normal 212 of the first prism surface 211 onto the reference plane 12 is not parallel to the projection 223 of the normal 222 of the second prism surface 221 onto the reference plane 12. This means that the light reflected and deflected by the first prism surface 211 and the light reflected and deflected by the second prism surface 212 have different directions in the reference plane 12, or in other words, the first prism surface 211 and the second prism surface 212 deflect the light at different angles in the reference plane 12. This can be used to achieve the aforementioned three-dimensional display effect.

[0043] As an example, the projection of the normal 212 of the first prism surface 211 onto the reference plane 12 forms an angle of 20 to 80 degrees with the projection of the normal 222 of the second prism surface 221 onto the reference plane 12.

[0044] In some embodiments, the first prism surfaces 211 of each pattern unit in the first group of pattern units 21 are parallel to each other. This ensures that each pattern unit in the first group of pattern units 21 has a substantially consistent light deflection angle, which is beneficial for clear imaging of the first pattern. Similarly, the second prism surfaces 221 of each pattern unit in the second group of pattern units 22 can also be parallel to each other. This also ensures that each pattern unit in the second group of pattern units 22 has a substantially consistent light deflection angle, which is beneficial for clear imaging of the second pattern.

[0045] To enhance the display effect, in addition to the first group of pattern units 21 and the second group of pattern units 22, in some embodiments, a third group of pattern units 23 may be further provided on the light guide plate 100. Similar to the first group of pattern units 21 and the second group of pattern units 22, the third group of pattern units 23 is arranged in a third pattern. Each pattern unit in the third group of pattern units 23 may correspondingly include a third light deflection part 230. The third light deflection part 230 is arranged to deflect the light entering the light guide plate 100 from the light incident surface 10 in a third direction X3 and exit the light guide plate 100 to form a third spatial image. The third direction X3 is different from both the first direction X1 and the second direction X2. Figure 6 The observable region 33 of the third spatial image is also shown. In this embodiment, the observable region 33 of the third spatial image does not overlap with the observable region 31 of the first spatial image and the observable region 32 of the second spatial image.

[0046] As mentioned earlier, different light deflection units form patterns within different angular ranges, allowing the observer to obtain a three-dimensional effect when viewing a spatial image. Adding a third set of pattern units 23 enhances this display effect, especially when the first, second, and third patterns are of essentially the same shape and size. It should be understood that the aforementioned three-dimensional display effect also depends on factors such as the observer's angular position and distance from the light guide plate. Increasing the number of pattern unit groups enhances the display effect and improves adaptability to the observer. For example, four, five, six, or more sets of pattern units can be provided on the light guide plate 100, and the light deflection angle of each set of pattern units can differ from the other sets. Figure 1 In the illustrated embodiment, a total of eight pattern units are provided.

[0047] As an example, such as Figure 5 As shown, the deflection angle of the second light deflection unit 220 is between the deflection angle of the first light deflection unit 210 and the deflection angle of the third light deflection unit 230. In addition to the aforementioned three-dimensional display effect, a larger number of pattern unit groups can also produce a dynamic display effect. For example, the first pattern, the second pattern, and the third pattern are three consecutive frames of a dynamic pattern. In this case, when the observer switches between different viewing angles, the first pattern, the second pattern, and the third pattern can be observed successively, thus producing a dynamic display effect. This dynamic effect may be particularly striking for the application of the light guide plate according to an embodiment of the present invention on vehicle headlights. In practice, due to the observer's walking or the movement of the vehicle, there is often relative motion between the observer and the vehicle, and therefore the viewing angle of the headlight pattern usually changes. Thus, the attention drawn to this dynamic display effect is even stronger than that drawn to a static pattern.

[0048] In some embodiments, the third light deflection section 230 also includes a microprism disposed on the side of the light guide plate 100 opposite to the light emitting surface 11. The microprism in the third light deflection section 230 has a third prism surface 231, and the angle A formed by the projection of the normal 232 of the second prism surface 221 onto the reference plane 12 and the projection of the normal 212 of the first prism surface 211 onto the reference plane 12 is... 12 The angle A formed by the projection of the normal 222 of the second prism surface 221 onto the reference plane 12 and the projection of the normal 232 of the third prism surface 231 onto the reference plane 12. 23 All are smaller than the angle A formed by the projection of the normal 212 of the first prism surface 211 onto the reference plane 12 and the projection of the normal 232 of the third prism surface 231 onto the reference plane 12. 13This means that the deflection angles of the first light deflector 210, the second light deflector 220, and the third light deflector 230 change sequentially. This helps to form a continuous dynamic pattern.

[0049] Figure 7 The image also shows the third direction X3' of the outgoing light after being reflected and deflected by the third prism 231 in the reference plane 12, which is different from the first direction X1' and the second direction X2'.

[0050] In some embodiments, the orientations of the first prism surface 211, the second prism surface 221, and the third prism surface 231 can be arranged such that the beam angle (the angle between the incident light and the reflected light) in the reference plane 12 can be 10 degrees, 20 degrees, 30 degrees, or 40 degrees.

[0051] In some embodiments, the third prism surfaces 231 of each pattern unit in the third group of pattern units 23 are parallel to each other. This also ensures that each pattern unit in the third group of pattern units 23 has a substantially consistent light deflection angle, which is beneficial for clear imaging of the third pattern.

[0052] In some embodiments, the thickness of the light guide plate 100 is on the order of millimeters, for example, not exceeding 2 millimeters. However, embodiments of the present invention are not limited thereto. In some embodiments, the size of the microprism is on the order of sub-millimeters, for example, the length of the prism surface does not exceed 0.5 millimeters (e.g., 0.2 millimeters), and the width does not exceed 0.1 millimeters (e.g., 0.05 millimeters). In the above embodiments, the prism surface can be considered as a flat surface.

[0053] In some embodiments, a frosted or textured area 24 may be provided on the light guide plate 100 in the area enclosed by a pattern formed by patterned units. In this frosted or textured area 24, micro-protrusions or depressions for scattering are provided on the surface of the light guide plate to improve the uniformity of the emitted light and enhance the display effect.

[0054] In some embodiments, such as Figure 1 As shown, both the first pattern formed by the first group of pattern units 21 and the second pattern formed by the second group of pattern units 22 have converging ends 25 facing the light incident surface 10. Specifically, the tip of the V-shaped profile faces the light incident surface 10. This structure is particularly suitable for situations where a single point light source is provided on the light incident surface 10. The direction of the pattern's extension is generally consistent with the overall propagation direction of the incident light from the point light source in the light guide plate 100, allowing for more efficient use of light energy to display the pattern without the need for numerous light sources.

[0055] Although in the above embodiments, the light deflection part is in the form of a microprism disposed on the back-to-light emitting surface 11 of the light guide plate 100, the embodiments of the present invention are not limited to this. For example, the light deflection part may also be in the form of a microstructure disposed on the light emitting surface 11 of the light guide plate 10, or other similar forms.

[0056] In embodiments of the present invention, the light guide plate 100 may be made of a transparent material known in the art, such as polycarbonate (PC).

[0057] Embodiments of the present invention also provide a light patterning component 300, comprising: a light guide plate 100 as described in any of the above embodiments and a light source 200. The light source 200 emits light toward the light incident surface 10 to provide light energy for displaying a pattern. The light guide plate 100 according to embodiments of the present invention employs a microprism array to form the pattern, resulting in high light energy efficiency. The requirements for the light source in displaying the pattern are relatively low. As an example, the first spatial image and the second spatial image can both be formed by light emitted from a single light source.

[0058] Embodiments of the present invention also provide a lighting and / or signal indicating device, comprising: a light guide plate 100 as described in any of the above embodiments or a light patterning component 300 as described in any of the above embodiments.

[0059] Embodiments of the present invention also provide a motor vehicle, including a light guide plate 100 as described in any of the above embodiments, or a light patterning component as described in any of the above embodiments, or a lighting and / or signal indicating device as described in any of the above embodiments.

[0060] The light guide plate 100 and light patterning component 300 according to embodiments of the present invention can be used as examples in any lighting and / or signaling device. This lighting and / or signaling device may include any type of motor vehicle lighting and / or signal lights, such as headlights, center high-mounted brake lights, turn signals, position lights, taillights, etc. The light guide plate 100 and light patterning component 300 according to embodiments of the present invention can also be used in fields other than vehicle lighting, such as streetlights, advertising lights, etc.

[0061] Although the invention has been described in conjunction with the accompanying drawings, the embodiments disclosed in the drawings are intended to illustrate preferred embodiments of the invention and should not be construed as limiting the invention.

[0062] While some embodiments of the general concept of the present invention have been shown and described, those skilled in the art will understand that changes may be made to these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined by the claims and their equivalents.

Claims

1. A light guide plate (100), comprising: The light incident surface (10) is used to receive incident light; The first group of pattern units (21) is arranged to form a first pattern. Each pattern unit in the first group of pattern units includes a first light deflection part. The first light deflection part is arranged to deflect the light that enters the light guide plate from the light incident surface in a first direction and exit the light guide plate to form a first spatial image. as well as The second group of pattern units (22) is arranged to form a second pattern. Each pattern unit in the second group of pattern units includes a second light deflection part. The second light deflection part is arranged to deflect light that enters the light guide plate from the light incident surface in a second direction different from the first direction and exit the light guide plate to form a second spatial image.

2. The light guide plate (100) according to claim 1, characterized in that, The first light deflection section and the second light deflection section include microprisms disposed on the side of the light guide plate opposite to the light emission surface.

3. The light guide plate (100) according to claim 2, characterized in that, The light guide plate has a flat shape. The light incident surface of the light guide plate is located on the side of the light guide plate, and the light emitting surface of the light guide plate is located at the top or bottom of the light guide plate. The microprism in the first light deflection part has a first prism surface, and the microprism in the second light deflection part has a second prism surface. The projection of the normal of the first prism surface onto the reference plane is not parallel to the projection of the normal of the second prism surface onto the reference plane. The reference plane is a plane perpendicular to the light emitting surface of the light guide plate.

4. The light guide plate (100) according to claim 3, characterized in that, The projection of the normal of the first prism surface onto the reference plane forms an angle of 20 to 80 degrees with the projection of the normal of the second prism surface onto the reference plane.

5. The light guide plate (100) according to claim 3, characterized in that, The first prism surfaces in each pattern unit of the first group of pattern units are parallel to each other, and the second prism surfaces in each pattern unit of the second group of pattern units are parallel to each other.

6. The light guide plate (100) according to claim 3, characterized in that, It also includes a third set of pattern units (23), which are arranged in a third pattern. Each pattern unit in the third set of pattern units includes a third light deflection part. The third light deflection part is arranged to deflect the light that enters the light guide plate from the light incident surface in a third direction and exit the light guide plate to form a third spatial image. The third direction is different from both the first direction and the second direction. The deflection angle of the second light deflection part to the light is between the deflection angle of the first light deflection part to the light and the deflection angle of the third light deflection part to the light.

7. The patterned light guide plate (100) according to claim 6, characterized in that, The third light deflection section includes a microprism disposed on the side of the light guide plate opposite to the light emitting surface. The microprism in the third light deflection section has a third prism surface. The angle formed by the projection of the normal of the second prism surface onto the reference plane and the projection of the normal of the first prism surface onto the reference plane, and the angle formed by the projection of the normal of the second prism surface onto the reference plane and the projection of the normal of the third prism surface onto the reference plane, are both smaller than the angle formed by the projection of the normal of the first prism surface onto the reference plane and the projection of the normal of the third prism surface onto the reference plane.

8. The light guide plate (100) according to claim 6, characterized in that, The first pattern, the second pattern, and the third pattern are three consecutive frames of a dynamic pattern.

9. The light guide plate (100) according to claim 7, characterized in that, The third prism surfaces in each pattern unit of the third group of pattern units are parallel to each other.

10. The light guide plate (100) according to any one of claims 1 to 9, characterized in that, Both the first pattern and the second pattern have a converging end facing the light incident surface.

11. The light guide plate (100) according to any one of claims 1 to 9, characterized in that, The observable areas of the first spatial image and the second spatial image may partially overlap or not overlap.

12. A lighting and / or signal indicating device, comprising: The light guide plate (100) according to any one of claims 1 to 11.

13. A motor vehicle comprising a light guide plate (100) according to any one of claims 1 to 11 or a lighting and / or signal indicating device according to claim 12.

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