Light distribution piece and vehicle lamp

Abstract

The utility model relates to a light distribution part and a vehicle lamp. The light distribution piece comprises a base body and a micro lens array, the micro lens array is arranged on the surface of one side of the base body, distributed in a rectangular array mode and provided with a first direction and a second direction along the two sides, and adjacent micro lenses are connected. The light-emitting surface of each micro lens is convex outwards, the orthographic projection of the light-emitting surface on the substrate has a first maximum size in the first direction and a second maximum size in the second direction, and the first maximum size is larger than the second maximum size. When the light distribution piece is applied to the lighting device, the light distribution piece can carry out light distribution on a plurality of LED light sources at regular intervals, through scattering and total reflection of the microlenses and light mixing among the microlenses, the luminance of the light distribution piece is remarkably improved on the whole, light source bright spots are eliminated, the lighting device has the characteristics of high brightness and no light source bright spots, and the lighting device is more attractive in appearance. And the number of the LED light sources does not need to be multiplied, so that the cost of the lighting device is obviously reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of semiconductor lighting, in particular to a light distribution member and a vehicle lamp. BACKGROUND

[0002] LED light sources have the advantages of small size, long service life, high efficiency, etc., and are widely used in various lighting scenes. The lighting device using LED light sources, such as high brake lights, can clearly observe the multiple light source bright spots inside when lit, and the visual effect is poor, which cannot meet the requirements. In order to weaken or eliminate the light source bright spots, the number of LED light sources is usually doubled, and the distance between light sources is reduced, so that the light emitting range of adjacent LED light sources is greatly overlapped, and the light is fully mixed, so as to weaken or eliminate the light source bright spots, and produce the visual effect of continuous and uniform light strip or light band. However, the cost of the lighting device is significantly increased due to the doubling of the number of light sources. SUMMARY

[0003] Therefore, it is necessary to provide a light distribution member and a vehicle lamp to solve the problem that the cost of the lighting device is significantly increased due to the doubling of the number of LED light sources.

[0004] A light distribution member comprises:

[0005] a base body; and

[0006] a microlens array, which is arranged on one side surface of the base body and has a rectangular array distribution along a first direction and a second direction of two sides, and adjacent microlenses of the microlens array are connected.

[0007] wherein the light emitting surface of each microlens is convex outward, and the orthographic projection of the light emitting surface on the base body has a first maximum dimension in the first direction and a second maximum dimension in the second direction, and the first maximum dimension is greater than the second maximum dimension.

[0008] In one of the embodiments, the orthographic projection is a parallelogram; the first maximum dimension is a long side of the orthographic projection, and the second maximum dimension is a short side of the orthographic projection; or the first maximum dimension is a long diagonal of the orthographic projection, and the second maximum dimension is a short diagonal of the orthographic projection.

[0009] In one of the embodiments, the orthographic projection is a rectangle; each microlens has a long side side surface and a short side side surface, and the height of the long side side surface is greater than the height of the short side side surface.

[0010] In one of the embodiments, the orthographic projection is a rectangle; the light emitting surface is an arc surface and has a long side arc and a short side arc connected.

[0011] In one of the embodiments, the curvature of the part of the long-side arc is equal to the curvature of the short-side arc.

[0012] In one of the embodiments, the orthographic projection is a rhombus.

[0013] In one of the embodiments, the ratio of the first maximum dimension to the second maximum dimension is 1.2-10.

[0014] In one of the embodiments, the base body is a cuboid, and the microlens array covers one side surface of the base body.

[0015] In one of the embodiments, the thickness of the base body is 2-15 mm.

[0016] A vehicle lamp, comprising:

[0017] A light distribution member as described in any one of the above embodiments; and

[0018] A light source module corresponding to the microlens array of the light distribution member.

[0019] The light distribution member and the vehicle lamp described above, by arranging the microlens array on one side surface of the base body, and the first maximum dimension of the orthographic projection of the light-emitting surface of each microlens being greater than the second maximum dimension, since the first maximum dimension is in the first direction, each microlens can scatter more light in the first direction, and the light emission is more divergent, the light emission between adjacent microlenses is fully mixed, at the same time, the total reflection effect of each microlens in the first direction is enhanced, thereby increasing the light propagating in the first direction inside the light distribution member, and the overall brightness of the light distribution member is significantly improved. When applied to a lighting device, the light distribution member can perform light distribution on multiple LED light sources with a regular pitch, and through the scattering, total reflection of the microlenses and the mixing of light between the microlenses, the luminous brightness of the light distribution member is significantly improved as a whole, the light source bright spot is eliminated, and the lighting device has the characteristics of high brightness and no light source bright spot, without the need to multiply the number of LED light sources, thereby significantly reducing the cost of the lighting device. Moreover, the light emission of the light distribution member is more uniform as a whole, and a uniform illumination area extending in the first direction can be formed visually, without visual dark areas, and the overall visual effect is good.

[0020] In addition, compared with the traditional thick-wall lens design or double-layer lens design, the thickness of the light distribution member is significantly thinned, and the structure is simple, the single-layer lens design of the light distribution member can replace the traditional double-layer lens design, the light propagation loss is significantly reduced, the light distribution brightness is high, and the material is greatly saved, thereby further reducing the cost. Compared with the traditional diffuser sheet light scattering mode, the light scattering of the microlens array does not cause a large amount of light emission loss, and the light emission brightness is high. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A partial structure schematic view of the light distribution member in one embodiment of the present application is shown in FIG. 1.

[0022] Figure 2 A partial structure schematic view of the light distribution member in one embodiment of the present application is shown in FIG. 1. Figure 1 A partial structure schematic view of the light distribution member in one embodiment of the present application is shown in FIG. 1.

[0023] Figure 3 A partial structure schematic view of the light distribution member in one embodiment of the present application is shown in FIG. 1. Figure 1 A top view of the light distribution member is shown in FIG. 1.

[0024] Figure 4 A front view of the light distribution member is shown in FIG. 1. Figure 1 A front view of the light distribution member is shown in FIG. 1.

[0025] Figure 5 A left view of the light distribution member is shown in FIG. 1. Figure 1

[0026] A partial top view of the light distribution member in another embodiment of the present application is shown in FIG. 2. Figure 6

[0027] A partial top view of the light distribution member in another embodiment of the present application is shown in FIG. 2. Figure 7 Figure 6 A sectional view of the light distribution member along I-I is shown in FIG. 3.

[0028] Figure 8 A sectional view of the light distribution member along II-II is shown in FIG. 4. Figure 6

[0029] A schematic diagram of the vehicle lamp in one embodiment of the present application is shown in FIG. 5. Figure 9 BRIEF DESCRIPTION OF THE DRAWINGS

[0030] 100 - light distribution member; 110 - base; 112 - light entrance surface; 114 - orthographic projection; 116 - first maximum dimension; 118 - second maximum dimension; 120 - microlens array; 121 - microlens; 122 - light exit surface; 123 - long side surface; 124 - short side surface; 125 - long side circular arc; 126 - short side circular arc; 127 - sectional long arc; 128 - sectional short arc;

[0031] 200 - vehicle lamp; 210 - light source module; 212 - circuit board; 214 - light source device.

[0032] DETAILED DESCRIPTION

[0033] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without some or all of these specific details. In other instances, well known process steps have not been described in detail in order not to unnecessarily obscure the present application. ​​

[0034] In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0035] In addition, if there are terms such as "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implying the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In the present application, unless otherwise explicitly specified and limited, if the terms "mounting", "connecting", "connecting", "fixing" and the like appear, these terms should be interpreted broadly. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] In the present application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "first feature on or under second feature", the meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0039] Please see Figure 1 and Figure 2 , Figure 1 This illustration shows a partial structural diagram of the light distribution element in one embodiment of the present application from a certain viewing angle. Figure 2 It shows Figure 1 A partial structural schematic diagram of a light distribution component from another perspective. One embodiment of this application provides a light distribution component 100, which includes a substrate 110 and a microlens array 120. The microlens array 120 is disposed on one side surface of the substrate 110, and the other side surface of the substrate 110 has a light-incident surface 112. The light-incident surface 112 is used for light emitted from a light source to enter, and the microlens array 120 can scatter the light entering from the light-incident surface 112. The microlens array 120 is arranged in a rectangular array with a first direction x and a second direction y along both sides. Adjacent microlenses 121 of the microlens array 120 are connected. The light-emitting surface 122 of each microlens 121 is convex, and the orthographic projection 114 of the light-emitting surface 122 on the substrate 110 has a first maximum size 116 in the first direction x and a second maximum size 118 in the second direction y, where the first maximum size 116 is larger than the second maximum size 118.

[0040] By arranging the microlens array 120 on one side surface of the base 110, and the first maximum dimension 116 of the orthographic projection 114 of the light exit surface 122 of each microlens 121 is greater than the second maximum dimension 118, and the first maximum dimension 116 is in the first direction, each microlens 121 can scatter more light in the first direction x, and the light exit is more divergent, and the light exit between adjacent microlenses 121 is sufficiently mixed, while the total reflection effect of each microlens 121 in the first direction is enhanced, and the light propagating in the first direction x inside the light distribution member 100 is increased, and the overall brightness of the light distribution member 100 is significantly improved. When applied to a lighting device, the light distribution member 100 can perform light distribution on multiple LED light sources with a regular interval, and the light distribution member 100 can significantly improve the luminous brightness of the light distribution member 100 as a whole through scattering, total reflection of the microlenses 121, and mixing of light between the microlenses 121, eliminate light source bright spots, and make the lighting device have the characteristics of high brightness and no light source bright spots, without the need to multiply the number of LED light sources, which significantly reduces the cost of the lighting device. Moreover, the light distribution member 100 has more uniform overall light exit, can form a uniform illumination area extending in the first direction x in vision, has no visual dark area, and has good overall visual effect.

[0041] When the lighting device is a high-mounted brake light, a conventional high-mounted brake light uses a thick-walled lens, a double-layer lens, or a diffuser sheet for light distribution to achieve a preset light effect. However, the overall thickness of the thick-walled lens is large, and one side of the thick-walled lens is provided with a reflection structure, the overall structure is complex, and the light exit brightness is affected. The double-layer lens processes the light emitted by the light source twice, which also affects the light exit brightness. The diffuser sheet diffuses the light exit of the lens, has good scattering effect, but can cause a large decrease in light exit brightness. Therefore, compared with the above conventional methods, the thickness of the light distribution member 100 of the present application is significantly reduced, the structure is simple, the single-layer lens design of the light distribution member 100 can replace the conventional double-layer lens design, the light propagation loss is significantly reduced, the light distribution brightness is high, and the material is greatly saved, further reducing the cost.

[0042] It should be noted that the application scenario of the light distribution member 100 can be but is not limited to a vehicle lamp, and the vehicle lamp includes but is not limited to a headlamp, a daytime running lamp, a brake light, a turn signal light, a fog lamp, and a head-up display system light. Obviously, the light distribution member 100 can also be applied to other lighting scenarios, such as smart home appliances, unmanned aerial vehicles, or robots, etc. The above-mentioned "visual dark area", "light source bright spot", and "visual effect" are from the perspective of human eyes, and have no direct relationship with the uniformity of the light spot projected on the plane. Taking a strip-shaped high-mounted brake light as an example, when it is turned on, an observer in a rear vehicle can visually see a uniform and continuous elongated light strip without dark areas or bright spots.

[0043] The base 110 is a cuboid, and its shape is not limited thereto. The microlens array 120 covers one side surface of the base 110 and is in a rectangular shape, wherein the first direction x is the length direction of the microlens array 120, and the second direction y is the width direction of the microlens array 120. The other side surface of the base 110 is the light inlet surface 112. The microlens array 120 fully utilizes one side surface of the base 110, and the light rays entering from the light inlet surface 112 can basically pass through the microlens array 120 and be scattered out. In other embodiments, the microlens array 120 can be in a square shape and only occupy part of one side surface of the base 110. The other part can be used as an assembly surface to contact other elements. The light inlet surface 112 on the other side of the base 110 corresponds to the microlens array 120, and the area of the light inlet surface 112 can be slightly smaller than or equal to the area of the microlens array 120.

[0044] In order to reduce the loss of light rays, the side surface of the base 110 can be provided with a reflective layer (not shown). The reflective layer can be formed by spraying, electroplating reflective materials or pasting reflective film, and can reflect the light rays propagating to the side surface of the base 110, further reduce the light propagation loss, and help to further improve the light brightness of the light distribution piece 100.

[0045] The thickness of the base 110 is 2mm-15mm, so that the overall thickness of the light distribution piece 100 is smaller, further reducing the use of materials, and shortening the propagation path of the light rays in the base 110. The light is more easily penetrated through the base 110, and the propagation loss of the light rays in the base 110 is reduced. Combined with the microlens array 120, the light brightness of the light distribution piece 100 is higher, and the light source bright spot and visual dark area are better eliminated, and a more uniform and continuous lighting area visual effect is generated. In the embodiment, the thickness of the base 110 can be, but is not limited to, 5mm or 6mm.

[0046] Please refer to Figure 3 , Figure 3A partial top view of the light distribution member in the embodiment is shown, the orthographic projection 114 of the microlens 121 is a parallelogram, specifically a rectangle. The first maximum dimension 116 is the long side of the orthographic projection 114, and the second maximum dimension 118 is the short side of the orthographic projection 114. Since the light distribution member 100 is a cuboid as a whole, each microlens 121 is also a cuboid, and the length directions are the same, the light distribution member 100 can form a uniform and continuous light bar or light band in vision after light distribution. Moreover, the microlens 121 in the cuboid shape can be seamlessly spliced in the first direction x and the second direction y, thereby increasing the number of microlenses 121 per unit area, further improving the light scattering effect, and the light mixing effect between adjacent microlenses 121 is better, so that the overall light distribution is more uniform and the brightness is higher. In alternative embodiments, the orthographic projection 114 of each microlens 121 can be a hexagon or an octagon, and the overall length in the first direction x is greater than the overall length in the second direction y.

[0047] The ratio of the long side to the short side of the orthographic projection 114 of the microlens 121 is 1.2-10. Obviously, the larger the ratio, the longer the long side, and the better the scattering effect of the microlens 121 in the length direction.

[0048] Further, the ratio of the long side to the short side of the orthographic projection 114 of the microlens 121 is 1.3-1.7, and the scattering effect in the first direction and the second direction is considered. In the embodiment, the ratio of the long side to the short side of the orthographic projection 114 of the microlens 121 is 1.4, 1.5 or 1.7, but is not limited thereto.

[0049] Please refer to Figure 4 and Figure 5 , Figure 4 A partial front view of the light distribution member in the embodiment is shown, Figure 5 A left view of the light distribution member in the embodiment is shown, in combination with Figure 2 The height h1 of the long side side surface 123 of each microlens 121 is greater than the height h2 of the short side side surface 124, thereby increasing the area of the light emitting surface 122 in the length direction and further improving the scattering effect of the microlens 121 in the length direction.

[0050] The light emitting surface 122 is a convex curved surface, and the area of the convex curved surface is relatively large, which is beneficial to enhance the scattering effect. In other embodiments, the microlens 121 can be a convex ridge structure, such as a triangular ridge, and the light emitting surface 122 is two intersecting inclined surfaces.

[0051] Further, the light-out surface 122 is arc-shaped, and has a long-side circular arc 125 and a short-side circular arc 126 connected thereto. In other words, the light-out surface 122 is arc-shaped formed by moving the short-side circular arc 126 along the long-side circular arc 125 or formed by moving the long-side circular arc 125 along the short-side circular arc 126. In the same projection area, the light-out surface 122 has a larger area and better light-out scattering effect. In other embodiments, each microlens 121 can be cylindrical or semi-circular strip-shaped.

[0052] The curvature of the part of the long-side circular arc 125 is equal to the curvature of the short-side circular arc 126, and is easy to form. In this case, the radius of the long-side circular arc 125 is the same as that of the short-side circular arc 126, but the arc length of the long-side circular arc 125 is greater than that of the short-side circular arc 126, i.e., the short-side circular arc 126 can completely coincide with the central part of the long-side circular arc 125.

[0053] The light distribution piece 100 is an integral structure, and can be made by a thermal reflow method, a micro-plastic stamping method, or a micro-droplet jetting method. The material of the light distribution piece 100 can be, but is not limited to, polymethyl methacrylate (PMMA), polycarbonate (PC), optical glass, or silicone. When the material of the light distribution piece 100 is PMMA or PC, the light distribution piece 100 has good impact resistance and optical performance, and meets the application scene requirements of vehicle lamps.

[0054] Please refer to Figure 6 to Figure 8 , Figure 6 a partial top view of a light distribution piece in another embodiment of the present application is shown, Figure 7 a sectional view of the light distribution piece along I-I in Figure 6 a sectional view of the light distribution piece along II-II in Figure 8 a sectional view of the light distribution piece along II-II in Figure 6 Compared with the light distribution piece 100 in the above embodiment, each microlens 121 of the light distribution piece 100 in this embodiment has a different shape, and the orthographic projection 114 thereof is rhombic. The first maximum dimension 116 is the long diagonal of the orthographic projection 114, and the second maximum dimension 118 is the short diagonal of the orthographic projection 114. The area of each microlens 121 is large in the middle and small at the corners, and the central region thereof can better scatter light. The corner positions of each microlens 121 are spliced with three adjacent microlenses 121 in the first direction x and the second direction y, and the light is more fully mixed at the spliced positions. These designs can better eliminate the light source bright spots. As to other technical effects, please refer to the above embodiment, and no further description is given herein. In other embodiments, the orthographic projection 114 of the microlens 121 can also be other parallelograms besides rectangles and rhombuses.

[0055] The height h3 of the section of each microlens 121 in the long diagonal is greater than the height h4 of the section in the short diagonal, so as to increase the area of the light-out surface 122 in the first direction x and further improve the scattering effect of the microlens 121 in the first direction x.

[0056] The light-exiting surface 122 is a convex curved surface, and the area of the convex curved surface is relatively large, which is beneficial to enhance the scattering effect.

[0057] Further, the light-exiting surface 122 is an arc surface, a profile on a long diagonal of the arc surface has a profile long arc 127, a profile on a short diagonal of the arc surface has a profile short arc 128, and the centers of the profile long arc 127 and the profile short arc 128 intersect. Under the same projection area, the area of the light-exiting surface 122 is larger, and the light-exiting and scattering effect is better.

[0058] The curvature of a part of the profile long arc 127 is equal to the curvature of the profile short arc 128, and the profile long arc 127 and the profile short arc 128 are easily formed. In this case, the radii of the profile long arc 127 and the profile short arc 128 are the same, but the curvature of the profile long arc 127 is greater than the curvature of the profile short arc 128, that is, the profile short arc 128 can be completely coincided with the central part of the profile long arc 127.

[0059] As for other aspects of the light distribution member in the embodiment, they are basically the same as those of the light distribution member in the above-described embodiments, and the specific content can be referred to the description of the above-described embodiments, which will not be repeated here.

[0060] Please refer to Figure 9 , Figure 9 A schematic diagram of a vehicle lamp in an embodiment of the application is shown, and the vehicle lamp 200 provided in the embodiment of the application includes a light distribution member 100 and a light source module 210, and the light source module 210 is arranged corresponding to the microlens array 120 of the light distribution member 100. The specific structure of the light distribution member 100 is referred to the above-described embodiments. Since the vehicle lamp 200 in the embodiment adopts all the technical solutions of the above-described embodiments, it also has all the beneficial effects brought by the technical solutions of the above-described embodiments, which will not be repeated here.

[0061] It should be noted that the vehicle lamp 200 includes but is not limited to a headlamp, a daytime running lamp, a brake lamp, a turn signal lamp, a fog lamp, and a head-up display system lamp. In the embodiment, the vehicle lamp 200 can be but is not limited to a high-mounted brake lamp.

[0062] The light source module 210 includes a circuit board 212 and a plurality of light source devices 214, and the plurality of light source devices 214 are arranged on the circuit board 212 in a spaced manner and correspond to the microlens array 120. Each light source device 214 includes a light emitting chip (not shown) and a dimming lens (not shown), and the dimming lens is arranged corresponding to the light emitting chip. As shown in the figure, Figure 9As shown, the light distribution piece 100 and the light source module 210 are shown from a side view perspective, the light modulation lens can converge the light emitted by the light emitting chip in the width direction (second direction), and the width of the micro-lens array 120 is adapted to reduce the light waste in the width direction and improve the light utilization. Among them, the light emitting chip can be but not limited to LED chip. In other embodiments, the light source module 210 can include a circuit board, a plurality of light emitting chips and a plurality of light modulation lenses, the plurality of light emitting chips are arranged on the circuit board, and the plurality of light modulation lenses are arranged one by one corresponding to the plurality of light emitting chips.

[0063] The technical features of the above-mentioned embodiments can be combined in any way. In order to make the description simple, all possible combinations of the technical features in the above-mentioned embodiments are not described, but as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0064] The above-mentioned embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A light distribution member, characterized by, Comprising: a base body (110); and a microlens array (120) disposed on one side surface of the base body (110) and arranged in a rectangular array with a first direction and a second direction along two sides, adjacent microlenses (121) of the microlens array (120) being connected; wherein an exit surface (122) of each microlens (121) is convex, a normal projection (114) of the exit surface (122) on the base body (110) has a first maximum dimension (116) in the first direction and a second maximum dimension (118) in the second direction, and the first maximum dimension (116) is greater than the second maximum dimension (118).

2. The light distribution piece according to claim 1, wherein the normal projection (114) is a parallelogram; the first maximum dimension (116) is a long side of the normal projection (114), and the second maximum dimension (118) is a short side of the normal projection (114); or the first maximum dimension (116) is a long diagonal of the normal projection (114), and the second maximum dimension (118) is a short diagonal of the normal projection (114).

3. The light distribution piece according to claim 2, wherein the normal projection (114) is a rectangle; each microlens (121) has a long side side surface (123) and a short side side surface (124), and a height of the long side side surface (123) is greater than a height of the short side side surface (124).

4. The light distribution piece according to claim 2, wherein the normal projection (114) is a rectangle; the exit surface (122) is arc-shaped and has a long side arc (125) and a short side arc (126) connected to each other.

5. The light distribution member according to claim 4, characterized by a curvature of a part of the long side arc (125) is equal to a curvature of the short side arc (126).

6. The light distribution member according to claim 2, wherein the normal projection (114) is a rhombus.

7. The light distribution member according to any one of claims 1 to 6, characterized by a ratio of the first maximum dimension (116) to the second maximum dimension (118) is 1.2-10.

8. The light distribution member according to any one of claims 1 to 6, characterized by the base body (110) is a cuboid, and the microlens array (120) covers one side surface of the base body (110).

9. The light distribution member according to any one of claims 1 to 6, wherein a thickness of the base body (110) is 2-15 mm.

10. A vehicle lamp characterized by Comprising: a light distribution piece (100) according to any one of claims 1-9; and a light source module (210) corresponding to the microlens array (120) of the light distribution piece (100).

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