Light patterning device and vehicle headlight

Abstract

Embodiments of the present invention provide a light patterning device for a vehicle headlight and a vehicle headlight including the light patterning device. The light patterning device includes: a light source; and a light distribution device having a light incident side and a light exit side opposite to each other. A plurality of first light deflection portions extending in parallel are provided on the light incident side of the light distribution device, and a plurality of second light deflection portions extending in parallel are provided on the light exit side of the light distribution device. The plurality of first light deflection portions are respectively configured to receive different portions of a light beam from the light source and deflect them towards the second light deflection portions. The plurality of second light deflection portions deflect the respective light beam portions deflected by the first light deflection portions to form a light pattern. The extending direction of the first light deflection portion is not parallel to the extending direction of the second light deflection portion.

Description

Technical Field

[0001] The present invention relates to the field of optical lighting and signal indication, and in particular to an optical patterning device and a vehicle headlight including the optical patterning device. Background Art

[0002] With the development of technology and the progress of society, people's requirements for optical lighting or signal indication devices are no longer limited to simply providing the functions of lighting or signal indication lamps. Therefore, there are more and more personalized requirements for optical lighting or signal indication devices (such as vehicle headlights for motor vehicles), and it may be necessary to provide richer beam patterns and lighting effects. For example, it may be desirable that the illumination or signal indication light contains certain information or patterns to meet the requirements of personalized customization. The prior art has provided devices for generating patterns in optical lighting or signal indication devices. However, in existing optical lighting or signal indication devices, especially in vehicle headlights for motor vehicles, there is still a lack of a device that can pattern the illumination or signal indication light while forming a pattern with a three-dimensional optical effect. Summary of the Invention

[0003] An object of the present invention is to provide an optical patterning device that can perform three-dimensional patterning on illumination or signal indication light with a simple structure.

[0004] Another object of the present invention is to provide a vehicle headlight including the optical patterning device.

[0005] An embodiment of the present invention provides an optical patterning device for a vehicle headlight, including: a light source; and a light distribution device having a light incident side and a light exit side opposite to each other. A plurality of first light deflection portions extending in parallel are provided on the light incident side of the light distribution device, and a plurality of second light deflection portions extending in parallel are provided on the light exit side of the light distribution device. The plurality of first light deflection portions are respectively used to receive different portions of the light beam from the light source and deflect them towards the second light deflection portions, and the plurality of second light deflection portions deflect the respective light beam portions deflected by the first light deflection portions to form a light pattern, wherein the included angle between the extending direction of the first light deflection portion and the extending direction of the second light deflection portion is greater than zero.

[0006] In one embodiment, both the first light deflection portion and the second light deflection portion are formed by cylindrical lenses.

[0007] In one embodiment, the width of each second light deflecting portion is d, the distance from the top of the first light deflecting portion on the light incident side to the root of the second light deflecting portion on the light emitting side is H, the incident angle of the corresponding light beam portion emitted from the light source at the position corresponding to the center of the second light deflecting portion on the light incident side and in the plane of the cross section of the second light deflecting portion is α, and the refractive index of the material of the light distribution device is n. Then, a part or all of the second light deflecting portions satisfy:

[0008] H×sinα / n<d / 2.

[0009] In one embodiment, the width of each second light deflecting portion is:

[0010] d = 2×H×arcsin(n×sin(arctan(H(n - 1)) / 2r)),

[0011] where r is the radius of curvature of the cross-sectional profile of the second light deflecting portion.

[0012] In one embodiment, the radius of curvature of the cross-sectional profile of the first light deflecting portion is greater than, equal to, or less than the radius of curvature of the cross-sectional profile of the second light deflecting portion.

[0013] In one embodiment, the plurality of first light deflecting portions are arranged adjacent to each other, and the plurality of second light deflecting portions are arranged adjacent to each other.

[0014] In one embodiment, the extending direction of the first light deflecting portion is perpendicular to the extending direction of the second light deflecting portion.

[0015] In one embodiment, the extending direction of the second light deflecting portion is perpendicular to the central axis of the light beam emitted from the light source or forms an inclined angle with the central axis of the light beam emitted from the light source.

[0016] In one embodiment, the light source is disposed in close contact with the light incident side of the light distribution device.

[0017] In one embodiment, the widths of the first light deflecting portion and the second light deflecting portion are less than 0.15 mm.

[0018] In one embodiment, the light emitting angle of the light source in the plane perpendicular to the first light deflecting portion is greater than 30 degrees.

[0019] In one embodiment, the light source includes one or more white light or monochromatic light emitting diodes.

[0020] In one embodiment, the light source is a point light source or a surface light source.

[0021] In one embodiment, the width of the first light deflecting portion is equal to the width of the second light deflecting portion.

[0022] In one embodiment, the width of the first light deflection part is greater than or less than the width of the second light deflection part.

[0023] In one embodiment, the included angle between the extending direction of the first light deflection part and the extending direction of the second light deflection part is between 20 degrees and 90 degrees.

[0024] An embodiment of the present invention provides a vehicle lamp, including the light patterning device according to any one of the above embodiments.

[0025] As the light patterning device in at least one of the above embodiments of the present invention, by arranging a series of light deflection parts in the light distribution device, a pattern with a three-dimensional effect is formed, thereby improving the visual effect of the illumination and / or signal indication light of the vehicle lamp. This light patterning device can also improve the optical efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A perspective schematic diagram showing a light patterning device according to an embodiment of the present invention;

[0027] Figure 2 A side view schematic diagram showing a light patterning device according to an embodiment of the present invention;

[0028] Figure 3 A top view schematic diagram showing a light patterning device according to an embodiment of the present invention;

[0029] Figure 4 A side view schematic diagram showing a light patterning device according to an embodiment of the present invention, wherein the light distribution device is placed obliquely;

[0030] Figure 5 Schematically showing the working principle of the second light deflection part; and

[0031] Figure 6 A schematic diagram showing a light patterning device according to an embodiment of the present invention, wherein the light source is placed close to the light distribution device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The technical solutions of the present invention will be further specifically described below through embodiments in combination with the drawings. In the specification, the same or similar reference numerals represent the same or similar components. The following description of the embodiments of the present invention with reference to the drawings is intended to explain the overall inventive concept of the present invention and should not be construed as a limitation of the present invention.

[0033] According to the general concept of the present invention, there is provided a light patterning device for a vehicle lamp, comprising: a light source; and a light distribution device having a light incident side and a light exit side opposite to each other. A plurality of first light deflection portions extending in parallel are provided on the light incident side of the light distribution device, and a plurality of second light deflection portions extending in parallel are provided on the light exit side of the light distribution device. The plurality of first light deflection portions are respectively configured to receive different portions of a light beam from the light source and deflect them towards the second light deflection portions, and the plurality of second light deflection portions deflect the respective light beam portions deflected by the first light deflection portions to form a light pattern. Wherein, the included angle between the extending direction of the first light deflection portion and the extending direction of the second light deflection portion is greater than zero.

[0034] In addition, in the following detailed description, for the sake of explanation, many specific details are set forth to provide a thorough understanding of the embodiments of the present disclosure. However, it is obvious that one or more embodiments can also be implemented without these specific details.

[0035] Figure 1 Fig. schematically shows a light patterning device 100 according to an embodiment of the present invention. The light patterning device 100 includes: a light source 10 and a light distribution device 20. The light distribution device 20 has a light incident side 21 and a light exit side 22 opposite to each other. The light incident side 21 is configured to receive a light beam 40 from the light source 10 and may be arranged facing the light source 10, for example. The light that enters from the light incident side 21 and passes through the light distribution device 20 exits from the light exit side 22. For example, the light exit side 22 may be arranged facing away from the light source 10. A plurality of first light deflection portions 31 extending in parallel are provided on the light incident side 21 of the light distribution device 20, and a plurality of second light deflection portions 32 extending in parallel are provided on the light exit side 22 of the light distribution device 20. The plurality of first light deflection portions 31 are respectively configured to receive different portions of the light beam 40 from the light source 10 and deflect them towards the second light deflection portions 32, and the plurality of second light deflection portions 32 deflect the respective light beam portions deflected by the first light deflection portions 31, thereby forming a light pattern. The included angle between the extending direction of the first light deflection portion 31 and the extending direction of the second light deflection portion 32 is greater than zero (i.e., they are not parallel). The light beam with the light pattern refracted by the second light deflection portion 32 can exit from the vehicle lamp and be used to form an illumination and / or signal indication light beam.

[0036] With the aid of the light patterning device 100 according to an embodiment of the present invention, patterning of a light beam can be achieved. For example, when the light source 10 is a point light source (such as a light-emitting diode), the light beam passing through the light patterning device 100 may form an enlarged quadrilateral pattern. Specifically, when the light beam 40 passes through the first light deflection portion 31, due to the deflection effect of the first light deflection portion 31, the light beam 40 will be guided towards the second light deflection portion 32, and the cross-sectional shape of the light beam 40 will become approximately a bright line. The refraction effect of the second light deflection portion 32 will expand the light beam 40 with a cross-sectional pattern approximately a bright line. Since the extension direction of the first light deflection portion 31 is not parallel to the extension direction of the second light deflection portion 32, after passing through the light distribution device 20, the light beam 40 can be expanded and shaped in two dimensions to form a desired pattern, such as a rectangle, a parallelogram, a rhombus, etc. When the light source 10 includes a row of point light sources, the light beam passing through the light patterning device 100 may form a set of two-dimensional shaped patterns, and these shapes can also overlap each other.

[0037] As an example, when the included angle between the extension direction of the first light deflection portion and the extension direction of the second light deflection portion is between 20 degrees and 90 degrees, the effect of the formed pattern is better.

[0038] As an example, the deflection effect of the first light deflection portion 31 on the light beam can be achieved by refraction. For example, the first light deflection portion 31 may have a surface profile with a convex curved surface (such as a cylindrical surface). This helps to converge the light beam and improve the optical efficiency. For example, the first light deflection portion 31 can guide 70%, 80%, or 90% or even a larger proportion of the light beam 40 to the second light deflection portion 32.

[0039] Since the distances between the respective first light deflection portions 31 and the light source 10 may vary, and in addition to the refraction effects of the first light deflection portion 31 and the second light deflection portion 32 on the light beam, there will be a difference in the optical paths of the light beam portions emitted from the respective second light deflection portions 32. For example, as Figure 1 shown, the light beam portions incident through different first light deflection portions 31 and emitted from different second light deflection portions 32 can experience different optical paths.

[0040] Due to this difference in optical path, when an observer views the respective light beam portions emitted from the respective second light deflection portions 32 (or different parts of the second light deflection portion 32), a three-dimensional visual effect will be produced. For example, in Figure 1In the shown situation, the observer will feel that the beam portions emitted from certain parts on the light-emitting side 22 of the light distribution device 20 (for example, the beam portions emitted from the second light deflection portion 32 located at the outer periphery of the light-emitting side 22) are emitted from a farther position compared to other beam portions. Thus, a sense of depth will be visually felt in the pattern, and even bending of the pattern (such as a line) may occur, thereby generating a three-dimensional effect.

[0041] When the light source 10 includes multiple point light sources, such as a row of light-emitting diodes, since different point light sources will cause more obvious optical path differences between the respective beam portions of different beams, therefore, the three-dimensional effect will also be more significant.

[0042] The placement manner of the light source 10 and the light distribution device 20 may also affect the three-dimensional effect. For example, as Figure 2 and Figure 4 shown, the extending direction of the second light deflection portion 32 can be perpendicular to the central axis 41 of the beam 40 emitted from the light source 10 (for example, as Figure 2 shown), or can form an inclined angle with the central axis 41 of the beam 40 emitted from the light source 10 (for example, as Figure 4 shown). Placing the light distribution device 20 inclined with respect to the central axis 41 of the beam 40 is beneficial to further increase the optical path difference between the respective beam portions from the light source 10 to each second light deflection portion 32 (see Figure 4 ), thereby enhancing the three-dimensional visual effect in the beams emitted from different second light deflection portions 32 or different parts of the second light deflection portion 32. Generally speaking, the larger the inclination angle, the stronger the three-dimensional visual effect.

[0043] As an example, the light distribution device 20 (or the extending direction of the second light deflection portion 32) can form an inclination angle of 20 degrees to 70 degrees with respect to the central axis 41 of the beam 40 emitted from the light source 10, for example, an inclination angle of 30 degrees to 60 degrees, such as an inclination angle of 45 degrees.

[0044] As an example, the first light deflection portion 31 and the second light deflection portion 32 can both be formed by cylindrical lenses, that is, the surfaces of the first light deflection portion 31 and the second light deflection portion 32 can be formed by at least a part of a cylindrical surface. As Figures 1 to 4 shown. However, the present invention is not limited thereto, and the first light deflection portion 31 and the second light deflection portion 32 can also have other shapes.

[0045] Figure 3 Shows an exemplary refraction effect of the second light deflection portion 32 on the beam. A part of the exemplary beam 40 is converged when passing through the second light deflection portion 32, but after passing through the convergence point, it is again in the same direction as Figure 3diffuses in a plane parallel to the paper surface of , thereby achieving the expansion of the light beam. Since the light source 10 may have a certain range of emission angles and the surface of the light incident side 21 of the light distribution device 20 is also uneven (provided with the first light deflection portion 31), the incident angles of different portions of the light beam 40 on the light incident side 21 of the light distribution device 20 are different. Thus, each light beam portion passing through different first light deflection portions 31 will reach different portions of each second light deflection portion 32 along different directions. Therefore, the refraction of the light beam by the second light deflection portion 32 can also be performed in multiple directions. For example, for Figure 3 in the example of , a portion of the light beam 40 can also diffuse in a plane inclined with respect to the Figure 3 paper surface of .

[0046] Taking the second light deflection portion 32 having a cylindrical surface profile as an example, the refraction of the light beam portion by the second light deflection portion 32 will be further introduced below.

[0047] Figure 5 Schematically shows a single second light deflection portion 32 (which faces a plurality of first light deflection portions 31, assuming that the second light deflection portion 32 is perpendicular to the first light deflection portion 31). The second light deflection portion 32 has a partially circular profile in a cross-section in a direction perpendicular to the extending direction of the second light deflection portion 32 (i.e., the Figure 5 X direction in ). The width of the second light deflection portion 32 is d, the distance from the top of the first light deflection portion 31 on the light incident side 21 to the root of the second light deflection portion 32 on the light exit side 22 is H, the incident angle of the corresponding light beam portion emitted from the light source 10 at a position corresponding to the center of the second light deflection portion 32 on the light incident side 21 and in the plane of the cross-section of the second light deflection portion 32 is α, and the refractive index of the material of the light distribution device 20 is n. In one example, a part of the second light deflection portions 32 or all of the second light deflection portions 32 satisfy:

[0048] H×sinα / n<d / 2 (Equation 1)

[0049] Under the condition of satisfying Equation 1, most of the light incident on the first light deflector 31 can be made to exit from the second light deflector 32. Thus, when observing from the light exit side 22 of the lighting device 20, the second light deflector 32 is bright, or in other words, the area corresponding to the second light deflector 32 is lit. When each second light deflector 32 satisfies Equation 1, the lighting device 20 as a whole will present a uniform bright pattern. However, in the embodiments of the present invention, it is not limited that all second light deflectors 32 must satisfy Equation 1. For example, the incident angles of the light beam portions emitted by the light source 10 on each second light deflector 32 may be different. Thus, when the incident angle of the light beam portion is very large, the corresponding second light deflector 32 may no longer satisfy Equation 1. At this time, the intensity of the light exiting from the second light deflector 32 will decrease, and a dark area in the pattern may be formed. In another example, the size of the second light deflector 32 can also be adjusted according to actual requirements to obtain different bright and dark areas. It should be noted that in the embodiments of the present invention, the first light deflector 31 may have a curved surface, such as a cylindrical surface. Thus, the incident light of the light beam portion passing through the first light deflector 31 on the second light deflector 32 can also be Figure 5 at an inclination angle greater than 0 and less than 90 degrees with respect to the plane of the paper where Figure 5 is located, which can promote the diffusion and shaping of the light beam exiting from the second light deflector 32 in a plane perpendicular to the plane of the paper where

[0050] As an example, the width d of each second light deflector 32 can be:

[0051] d = 2×H×arcsin(n×sin(arctan(H(n - 1)) / 2r)) (Equation 2)

[0052] where r is the radius of curvature of the second light deflector 32.

[0053] As an example, the width d of the second light deflector 32 can be less than 5 mm, preferably less than 0.15 mm. For example, it can be greater than 0.01 mm and less than 0.15 mm, or greater than 0.05 mm and less than 0.15 mm, or greater than 0.1 mm and less than 0.15 mm. As an example, the distance H from the top of the first light deflector 31 on the light incident side 21 to the root of the second light deflector 32 on the light exit side 22 can be from 0.1 mm to 5 mm, for example less than 0.3 mm, such as 0.237 mm.

[0054] In an embodiment of the present invention, the extending direction of the first light deflection part 31 may be perpendicular to the extending direction of the second light deflection part 32, or may form an angle greater than 0 and less than 90 degrees with the extending direction of the second light deflection part 32. For example, when the extending direction of the first light deflection part 31 is perpendicular to the extending direction of the second light deflection part 32, it is more conducive to improving the optical efficiency, while when the extending direction of the first light deflection part 31 forms an angle greater than 0 and less than 90 degrees with the extending direction of the second light deflection part 32, it is conducive to improving the diversity of the formed pattern.

[0055] In one example, the radius of curvature of the cross-sectional profile of the first light deflection part 31 may be equal to the radius of curvature of the cross-sectional profile of the second light deflection part 32. However, in other examples, for example, in order to change the shape of the pattern of the light beam emitted from the light distribution device 20 to improve the visual effect (such as making it more slender or curved), the radius of curvature of the cross-sectional profile of the first light deflection part 31 may be greater than or less than the radius of curvature of the cross-sectional profile of the second light deflection part 32.

[0056] As an example, the plurality of second light deflection parts 32 are arranged adjacent to each other, as Figure 1 shown. This can improve the uniformity of the light intensity of the light beams emitted from the plurality of second light deflection parts 32. Similarly, the plurality of first light deflection parts 31 may also be arranged adjacent to each other. In one example, each of the first light deflection parts 31 or the second light deflection parts 32 may have the same size (including width, height, shapes of the incident surface and the exit surface, etc.), which helps to form a continuous and uniform pattern. However, in other examples, for example, in order to form a non-uniform pattern, the sizes of each of the first light deflection parts 31 or the second light deflection parts 32 may also be different, and even a certain interval may be set between adjacent first light deflection parts 31 or second light deflection parts 32. As an example, the size (including width, height, shapes of the incident surface and the exit surface, etc.) of the first light deflection part 31 may be the same as or different from that of the second light deflection part 32.

[0057] In the embodiment as Figure 1 shown, the light source 10 is arranged at a certain distance from the first light deflection part 31, but the present invention is not limited thereto. For example, the light source 10 may be arranged closely adjacent to the light incident side of the light distribution device 20, as Figure 6 shown. This way can make the distance between some of the first light deflection parts 31 on the light distribution device 20 and the light source 10 as short as possible, and the optical path difference between the respective light beam parts passing through different first light deflection parts 31 and second light deflection parts 32 can be increased, thereby enhancing the 3D effect. For example, in Figure 6 , the light beam part passing through the middle part of the light distribution device 20 may give a more prominent 3D visual effect due to the shorter optical path in the emitted light of the light distribution device 20.

[0058] In one example, the light source 10 has an emission angle greater than 30 degrees in a plane perpendicular to the extending direction of the first light deflection portion 31 (i.e., the plane where the paper surface of Figure 2 is located). The relatively large emission angle helps to increase the optical path difference between the respective light beam portions passing through the different first light deflection portions 31 and second light deflection portions 32, thereby improving the 3D effect.

[0059] As an example, the light source 10 may include one or more white light or monochromatic light emitting diodes. When the widths of the first light deflection portion 31 and the second light deflection portion 32 are relatively large compared to the visible light wavelength (for example, above 0.1 mm), the color separation effect of the first light deflection portion 31 and the second light deflection portion 32 on white light is not obvious and does not affect the visual effect of the emitted light. Therefore, the light source 10 may employ white light emitting diodes. The light source 10 may include a single light emitting diode or an array of light emitting diodes. The light source 10 may be supported by any component known in the prior art for carrying a light source, such as a lamp socket, a printed circuit board, and the like.

[0060] As an example, the light source 10 may be either a point light source or a surface light source (for example, it may be made of an organic light emitting diode (OLED)). As an example, the first light deflection portion 31 and the second light deflection portion 32 on the light distribution device 20 may extend in a line form. For example, see Figure 1 . As an example, the light distribution device 20 may be an integral part, thereby simplifying the manufacturing process and helping to improve the optical efficiency. For example, the light distribution device 20 may be made of a transparent glass, resin, or plastic material, such as PMMA (polymethyl methacrylate). The refractive indices of the first light deflection portion 31 and the second light deflection portion 32 may be, for example, between 1.3 and 2.0. The first light deflection portion 31 and the second light deflection portion 32 may have the same refractive index. For the convenience of manufacturing, the first light deflection portion 31 and the second light deflection portion 32 may have the same width. However, this is not necessary. For example, in order to provide greater flexibility in optical design to form a richer pattern, the width of the first light deflection portion 31 may be greater than or less than the width of the second light deflection portion 32.

[0061] Although only several first light deflection portions 31 and second light deflection portions 32 are shown in the accompanying drawings of the specification, it should be understood that this is schematic and is only for the sake of clarity. In the embodiments of the present invention, more first light deflection portions 31 and second light deflection portions 32 may be employed on the light distribution device 20, such as dozens, hundreds, or even thousands of first light deflection portions 31 and second light deflection portions 32.

[0062] In an embodiment of the present invention, both the first light deflection part 31 and the second light deflection part 32 on the light distribution device 20 can be formed by a grating structure. In this case, each of the first light deflection part 31 and the second light deflection part 32 can correspond to a grating unit, and the pitch of the grating can be equal to the width of the corresponding first light deflection part 31 or second light deflection part 32. Using a grating to form the light distribution device 20 can simplify the manufacturing process and system structure. It should be noted that a grating is usually used for diffraction in an optical system, but in the present invention, the diffraction effect is not the main one. In particular, when the widths of the first light deflection part 31 and the second light deflection part 32 are relatively large compared to the visible light wavelength (for example, above 0.1 mm), the first light deflection part 31 and the second light deflection part 32 mainly achieve the required 3D display effect through refraction. This is very different from the usual application of a grating in the prior art.

[0063] An embodiment of the present invention also provides a vehicle lamp including the light patterning device 100 as described in any of the above embodiments. The light beam emitted from the light distribution device 20 can be used to form the illumination and / or signal indication light of the vehicle lamp to improve the visual effect.

[0064] In an embodiment of the present invention, the light distribution device 20 can be supported or suspended by any known suitable device for holding an optical element, such as a support, a boom, etc.

[0065] The vehicle lamp according to an embodiment of the present invention can include any type of motor vehicle lighting lamp and / or signal lamp, such as a headlamp, a center high-mounted stop lamp, a turn signal lamp, a position lamp, a tail brake lamp, etc.

[0066] Although the present invention has been described in conjunction with the accompanying drawings, the embodiments disclosed in the drawings are intended to exemplarily illustrate the preferred embodiments of the present invention and should not be construed as a limitation on the present invention. The dimensional ratios in the drawings are merely illustrative and should not be construed as a limitation on the present invention. In particular, in order to clearly show the first light deflection part 31 and the second light deflection part 32, their sizes are exaggerated in the drawings.

[0067] Although some embodiments of the general concept of the present invention have been shown and described, those of ordinary skill in the art will understand that changes can be made to these embodiments without departing from the principles and spirit of the general inventive concept of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A light patterning device for a vehicle lamp, comprising: a light source; and a light distribution device having a light incident side and a light exit side opposite to each other. A plurality of first light deflection portions extending in parallel are provided on the light incident side of the light distribution device, and a plurality of second light deflection portions extending in parallel are provided on the light exit side of the light distribution device. The plurality of first light deflection portions are respectively configured to receive different portions of the light beam from the light source and deflect them toward the second light deflection portions, and the plurality of second light deflection portions are configured to deflect the respective light beam portions deflected by the first light deflection portions to form a light pattern, wherein the included angle between the extending direction of the first light deflection portion and the extending direction of the second light deflection portion is greater than zero. Both the first light deflection portion and the second light deflection portion include a cylindrical lens having a convex curved surface. The first light deflection portion is configured to converge the light beam emitted by the light source, and the second light deflection portion is configured to converge the light beam. The light beam diffuses after passing through the convergence point of the second light deflection portion. The difference between the widths of the first light deflection portion and the second light deflection portion and the wavelength of the visible light emitted by the light source is above 0.1 mm. The optical paths experienced by the light beams emitted from different second light deflection portions are at least partially different. The first light deflection portion and the second light deflection portion expand and shape the light beam emitted by the light source in two dimensions to form a desired pattern; wherein the width of each second light deflection portion is d, the distance from the top of the first light deflection portion on the light incident side to the root of the second light deflection portion on the light exit side is H, the incident angle of the corresponding light beam portion emitted from the light source at a position corresponding to the center of the second light deflection portion on the light incident side and in the plane of the cross-section of the second light deflection portion is α, and the refractive index of the material of the light distribution device is n. Then, some or all of the second light deflection portions satisfy: H×sinα / n<d / 2; wherein the width of each second light deflection portion is: d = 2×H×arcsin(n×sin(arctan(H(n - 1)) / 2r)), where r is the radius of curvature of the cross-sectional profile of the second light deflection portion.

2. The light patterning device according to claim 1, wherein, the radius of curvature of the cross-sectional profile of the first light deflection portion is greater than, equal to, or less than the radius of curvature of the cross-sectional profile of the second light deflection portion.

3. The light patterning device according to claim 1, wherein, the plurality of first light deflection portions are arranged adjacent to each other, and the plurality of second light deflection portions are arranged adjacent to each other.

4. The light patterning device according to claim 1, wherein, the extending direction of the first light deflection portion is perpendicular to the extending direction of the second light deflection portion.

5. The light patterning device according to claim 1, wherein, the extending direction of the second light deflection portion is perpendicular to the central axis of the light beam emitted from the light source or forms an inclination angle with the central axis of the light beam emitted from the light source.

6. The light patterning device according to claim 1, wherein, The light source is disposed in close contact with the light incident side of the light distribution device.

7. The light patterning device according to claim 1, wherein, the widths of the first light deflection portion and the second light deflection portion are less than 0.15 mm.

8. The light patterning device according to claim 1, wherein, the light emitting angle of the light source in a plane perpendicular to the first light deflection portion is greater than 30 degrees.

9. The light patterning device according to claim 1, wherein, the light source includes one or more white light or monochromatic light emitting diodes.

10. The light patterning device according to claim 1, wherein, the light source is a point light source or a surface light source.

11. The light patterning device according to claim 1, wherein, the width of the first light deflection portion is equal to the width of the second light deflection portion.

12. The light patterning device according to claim 1, wherein, the width of the first light deflection portion is greater than or less than the width of the second light deflection portion.

13. The light patterning device according to claim 1, wherein, the included angle between the extending direction of the first light deflection portion and the extending direction of the second light deflection portion is between 20 degrees and 90 degrees.

14. The light patterning device according to claim 1, wherein, the light distribution device is an integral part.

15. A vehicle lamp, comprising the light patterning device according to any one of claims 1-14.

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