Light homogenizing assembly

Abstract

The present application mainly provides a kind of light uniformity assembly, for the light source emitted by a light emitting device is modulated, the light uniformity assembly includes a first light uniformity structure and a second light uniformity structure, the first light uniformity structure and the second light uniformity structure are arranged in at least one light uniformity sheet, so that the light source emitted by the light emitting device is modulated twice.

Description

Technical Field

[0001] This invention belongs to the field of optical components. Specifically, this invention relates to a structure that can efficiently and uniformly distribute light sources. Background Technology

[0002] A diffuser is primarily used to modulate the light beam emitted by a light source, creating a uniform light field within the desired field of view to illuminate a target scene. There are two main types of diffusers: one based on the principle of light diffraction, and the other based on the principle of light refraction. These two types are the most commonly used diffusers in actual manufacturing and application.

[0003] The most common method for creating a light homogenizer based on the principle of light refraction is to use a microlens array. In the existing technology, most light homogenizers based on microlens arrays are regular microlens arrays. However, since the microlenses are arranged in a periodic and regular order in both row and column directions, the coherent light beam emitted by the coherent light source will interfere during its propagation in space after passing through this regular microlens array. This will result in the formation of alternating bright and dark stripe patterns in the far field, which will seriously weaken the light homogenizing effect of the light homogenizer and thus affect its use.

[0004] With the development of technologies and markets such as motion-sensing interaction and control, 3D object recognition and perception, intelligent environmental perception, and dynamic map construction, various application scenarios are showing increasing interest and demand for 3D vision and recognition technologies. Taking the two largest application areas at present as examples: On the one hand, as smartphones enter a period of saturation, the strong demand for depth camera technology due to incremental innovations, coupled with the continuous changes in smartphone interaction methods, is driving the rapid expansion of the global ToF market; on the other hand, in the automotive electronics field, the trend of automotive intelligence, represented by the increasing penetration rate of ADAS, is accelerating, and the ToF market, as the most mainstream solution in the field of depth ranging sensors such as LiDAR and smart cameras, is continuously benefiting.

[0005] Currently, the main solutions for 3D depth vision include Time-of-Flight (ToF), RGB binocular vision, and structured light. However, due to baseline limitations, RGB binocular vision can generally only measure relatively short distances; the distance decreases with distance measurement. For example, with RGB binocular vision, the measurement range is limited to within 2 meters for distances within a 10mm baseline. Furthermore, RGB binocular vision is greatly affected by changes in lighting and object texture, making it unusable at night. Structured light measurement is generally limited to within 10 meters, significantly restricting its application. Additionally, the effectiveness of structured light measurement is greatly affected by reflections.

[0006] Therefore, compared to the two measurement methods mentioned above, ToF technology eliminates the need for post-processing when calculating depth of field after image capture, thus avoiding delays and saving the cost increases associated with powerful post-processing systems. Furthermore, ToF technology offers greater flexibility in ranging capabilities, requiring only adjustments to the light source intensity, optical field of view, and emission pulse frequency during operation. In addition, ToF technology boasts numerous advantages, including resistance to external light interference, compact size, fast response speed, and high recognition accuracy, making it highly competitive in mobile devices, automotive applications, and other fields.

[0007] As mentioned above, since the light homogenizing effect of the existing light homogenizer is not ideal, those skilled in the art need to design a light homogenizer structure that can efficiently and uniformly homogenize the light source for application in TOF technology. Summary of the Invention

[0008] One advantage of the present invention is that it provides a light-diffusing component, wherein the light-diffusing component is used in an illumination component, wherein the light-diffusing component enables the light emitted by a light-emitting device in the illumination component to be uniformly diffused to achieve the target effect.

[0009] One advantage of the present invention is that it provides a light homogenizing component, wherein the light homogenizing component employs a random microlens array. Compared with the regular microlens array in the prior art, the light homogenizing component of the present invention can break the periodicity of the microlens arrangement and better homogenize the light emitted by the light source in the illumination component.

[0010] One advantage of the present invention is that it provides a light-uniforming component, wherein the light-uniforming component can solve the problem of bright and dark stripes generated by regular microlens arrays in the prior art, and thus can greatly improve the light uniformity effect of the light emitted by the light-emitting device.

[0011] One advantage of the present invention is that it provides a light homogenizing component, wherein the light homogenizing component can adjust the shape and intensity distribution of the far-field light spot as required, thereby making the light homogenizing component applicable to various different applications and thus improving the applicability of the light homogenizing component.

[0012] One advantage of the present invention is that it provides a light-uniforming component, wherein the light-uniforming component includes two light-uniforming plates, and the light emitted by the light-emitting device can produce a superimposed effect of modulation on the light field by passing through the two light-uniforming plates, thereby further improving the modulation effect of the light-uniforming component on the light emitted by the light source.

[0013] One advantage of the present invention is that it provides a light-uniforming component, wherein the light-uniforming component includes a light-uniforming sheet, the light-uniforming sheet is a double-sided light-uniforming sheet, and the light emitted by the light-emitting device can produce a superimposed effect on the modulation of the light field after passing through the double-sided light-uniforming sheet, thereby further improving the modulation effect of the light-uniforming component on the light emitted by the light source.

[0014] One advantage of the present invention is that it provides a light-diffusing component, wherein the light-diffusing component can expand the angle of the light emitted by the light-emitting device, thereby achieving a large angle that cannot be achieved by the light-diffusing sheet in the prior art, thereby further improving the modulation function of the light-diffusing component on the light emitted by the light source.

[0015] One advantage of the present invention is that it provides a light homogenizing component, wherein the light homogenizing component can achieve a specific light field distribution in a two-dimensional direction by separately controlling different one-dimensional directions, thereby breaking the mutual constraint of light between different directions.

[0016] One advantage of the present invention is that it provides a light homogenizing component, wherein the light homogenizing component can achieve a new distribution by simply arranging different light homogenizing sheets or different surfaces of a single light homogenizing sheet according to the final light field requirements.

[0017] To achieve at least one of the above-mentioned advantages, the present invention mainly provides a light-diffusing component for modulating a light source emitted by a light-emitting device. The light-diffusing component includes a first light-diffusing structure and a second light-diffusing structure, which are disposed on at least one light-diffusing sheet, thereby modulating the light source emitted by the light-emitting device twice.

[0018] In some embodiments, the first light-diffusing structure and the second light-diffusing structure are respectively disposed on opposite sides of the light-diffusing sheet to form a double-sided light-diffusing sheet, thereby modulating the light source emitted by the light-emitting device twice through the first light-diffusing structure and the second light-diffusing structure.

[0019] In some embodiments, both the first and second light-diffusing structures are designed using a randomized microlens array.

[0020] In some embodiments, the first homogenizing structure is refractive, and the second homogenizing structure is diffractive.

[0021] In some embodiments, the light-diffusing component includes a first light-diffusing sheet and a second light-diffusing sheet, the first light-diffusing structure is disposed on one side of the first light-diffusing sheet, and the second light-diffusing structure is disposed on one side of the second light-diffusing sheet, thereby modulating the light source emitted by the light-emitting device twice through the first light-diffusing structure and the second light-diffusing structure.

[0022] In some embodiments, the first light-diffusing structure and the second light-diffusing structure are respectively disposed on the same side of the first light-diffusing sheet and the second light-diffusing sheet, and both are facing the light-emitting device, wherein the first light-diffusing sheet is located between the light-emitting device and the second light-diffusing sheet.

[0023] In some embodiments, the first light-diffusing structure in the first light-diffusing sheet and the second light-diffusing structure in the second light-diffusing sheet are arranged facing each other, thereby modulating the light source emitted by the light-emitting device twice through the first light-diffusing structure and the second light-diffusing structure.

[0024] In some embodiments, the first light-diffusing structure in the first light-diffusing sheet and the second light-diffusing structure in the second light-diffusing sheet are arranged in opposite directions, and the first light-diffusing structure and the second light-diffusing structure modulate the light source emitted by the light-emitting device twice.

[0025] In some embodiments, the first and second light-diffusing structures are configured to achieve light field output with an expanded field of view.

[0026] In some embodiments, the first light-monopolizing structure is configured to regulate the horizontal light emitted by the light-emitting device, and the second light-monopolizing structure is configured to regulate the vertical light emitted by the light-emitting device, thereby forming and expanding a two-dimensional angular light field.

[0027] In some embodiments, the first light-diffusing structure is a random array of micropillar lenses arranged along the X direction, and the second light-diffusing structure is a random array of micropillar lenses arranged along the Y direction.

[0028] In some embodiments, the offset of each microlens in the first and second light-diffusing structures along the Z-axis ranges from -0.1 to 0.1 mm.

[0029] In some embodiments, the offset of each microlens in the first uniform light structure along the Z-axis ranges from -0.001 to 0.001 mm.

[0030] In some embodiments, the offset of each microlens in the second homogenizing structure along the Z-axis ranges from -0.004 to 0.004 mm.

[0031] In some embodiments, the offset of each microlens in the first uniform light structure along the Z-axis ranges from -0.002 to 0.002 mm.

[0032] In some embodiments, the offset of each microlens in the second uniform light structure along the Z-axis ranges from -0.002 to 0.002 mm. Attached Figure Description

[0033] Figure 1 This is a reference coordinate diagram for the design method of a randomized regularized microlens array for the light-uniforming structure in the light-uniforming component of the present invention.

[0034] Figure 2 This is a reference coordinate diagram for the second method of randomized regularized microlens array design of the light-uniforming structure in the light-uniforming component described in this invention.

[0035] Figure 3 This is a schematic diagram of the structure of the first embodiment of the light-diffusing component of the present invention.

[0036] Figure 4 This is a schematic diagram of the optical path of the first embodiment of the light-uniforming component described in this invention.

[0037] Figure 5a and 5b This is a schematic diagram of the light spot structure in the application process of the first embodiment of the light-uniforming component described in this invention.

[0038] Figure 6 This is a graph showing the horizontal and vertical light intensity distribution curves during the application of the first embodiment of the light-uniforming component described in this invention.

[0039] Figure 7 This is a schematic diagram of a modified embodiment of the first embodiment of the light-uniforming component described in this invention.

[0040] Figure 8 This is a schematic diagram of another modified embodiment of the first embodiment of the light-uniforming component described in this invention.

[0041] Figure 9 This is a schematic diagram of the structure of a second embodiment of the light-diffusing component described in this invention.

[0042] Figure 10 This is a schematic diagram of the optical path of a second embodiment of the light-uniforming component described in this invention.

[0043] Figure 11a and 11b This is a schematic diagram of the light spot structure during the application of the second embodiment of the light-uniforming component described in this invention.

[0044] Figure 12 This is a graph showing the horizontal and vertical light intensity distribution curves during the application of a second embodiment of the light-uniforming component described in this invention.

[0045] Figure 13This is a schematic diagram of the structure of the third embodiment of the light-diffusing component described in this invention.

[0046] Figure 14 This is a schematic diagram of a light spot formed by a modified embodiment of the light-uniforming component described in this invention.

[0047] Figure 15 This is a schematic diagram of another light spot formed by a modified embodiment of the light-uniforming component described in this invention. Detailed Implementation

[0048] The following description is intended to disclose the present invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0049] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0050] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0051] The present invention mainly provides a light-diffusing component 10 for use in an illumination component A, the illumination component A including a light-emitting device 20, the light-diffusing component 10 being disposed on the path of the light source 201 emitted by the light-emitting device 20, thereby modulating the light source 201 emitted by the light-emitting device 20.

[0052] The light-diffusing component 10 of the present invention includes at least two light-diffusing structures, which are disposed on at least one light-diffusing sheet, thereby modulating the light source 201 emitted by the light-emitting device 20 twice.

[0053] The parameters of the uniform light structure include the far-field spot shape, light intensity distribution, illumination angle range, and illumination uniformity, so the uniform light structure needs to be designed first.

[0054] First, based on the specifications and performance parameters of the light-emitting device 20, and in conjunction with the design objectives, the parameters of an initial microlens are determined. The initial microlens has an aspherical surface profile, which can be expressed by the formula:

[0055]

[0056] Where R is the radius of curvature of the microlens; K is the conic constant; and Aj is the aspherical coefficient. The initial microlens can be either a concave or convex lens, and those skilled in the art can choose according to the actual situation. Any lens that achieves the same or similar technical effect as this invention falls within the protection scope of this invention.

[0057] Once the optical parameters of the initial microlens are determined, the light emitted by the light-emitting device 20 can pass through the initial microlens, thus initially meeting the design goals. The initial microlens serves as the basic structure for the subsequent randomized microlens array, and its parameters become the foundational parameters for this array. Randomization is then performed on the initial microlens based on these foundational parameters. In the technical solution of the light-uniforming component 10 of this invention, the methods for randomizing the initial microlens include the following:

[0058] The first method is based on a randomly arranged array of microlenses on a substrate. The desired far-field scattering pattern and light intensity distribution are achieved by changing some random variables of this microlens array. For example... Figure 1 The diagram shown is a coordinate schematic of the entire microlens array.

[0059] In this diagram, the gray area represents the substrate, each square region represents the area where a single microlens is located, and (X,Y,Z) is the global coordinate system for the entire microlens array, while (xi,yi,zi) is the local coordinate system for each individual microlens. The center coordinates of the microlens in the local coordinate system are (x0,y0,z0).

[0060] At this point, the random variables that can be modulated include the shape and size of the effective aperture of the microlens, i.e., the cross-sectional profile of the microlens in the XY plane, the spatial arrangement of the microlenses, and the surface profile of the microlens array along the Z-axis.

[0061] The shape and size of the effective light-transmitting aperture of the microlens can be selected in various ways, including rectangular, circular, triangular, polygonal, and even irregular shapes. Those skilled in the art can select one or more shapes of microlenses to form a microlens array according to actual conditions or customer needs. In addition, the size of each microlens can be randomly selected within a certain range.

[0062] To prevent the light beam from propagating directly through the substrate, the entire surface of the homogenizing structure should ideally be covered by an optical structure that provides optical power. This requires the microlenses to be arranged as closely as possible, maximizing the surface structure coverage.

[0063] For each microlens, the surface profile along the Z-axis can be represented by a profile function:

[0064]

[0065] Where, ρ 2 =(x i -x0) 2 +(y i -y0) 2 R is the radius of curvature of the microlens; k is the conic constant; Aj is the aspherical coefficient; Z Offset It is the offset of each microlens along the z-axis.

[0066] These parameters can all vary randomly within a certain range, while Z Offset The randomization of these parameters is independent of other random variables. This randomization ensures that each microlens has a random surface profile along the Z-axis. Microlenses can be concave or convex; no specific restriction is placed here. Then, based on the random shape, size, and spatial arrangement of the microlenses, their coordinates are transformed from the local coordinate system (xi, yi, zi) to the global coordinate system (X, Y, Z). This ensures that the surface profile of the microlens array along the Z-axis is randomly regularized across the entire substrate, achieving a uniform light distribution.

[0067] The range of values ​​for each random variable varies depending on the specific requirements. In the uniform light distribution component 10 described in this invention, the range of values ​​for each random variable is as follows:

[0068] variable Range of values Single lens size 3um~250um R ±0.001~0.5mm k -∞～+100 <![CDATA[Z Offset ]]> -0.1~0.1mm

[0069] Furthermore, the present invention also includes a second method for randomly regularizing the initial microlens. Compared to the microlens described above, in the second method of randomly regularizing the initial microlens of the present invention, some of the controllable random variables are the same, such as the radius of curvature R of the microlens, the conic constant K, the aspherical coefficient Aj, and the offset Z of each microlens along the Z direction. Offset .

[0070] Microlenses can also be shaped in various ways, such as rectangular, circular, triangular, or polygonal.

[0071] Compared to Method 1, the most significant difference lies in the arrangement of the microlenses. The arrangement is as follows: Figure 2As shown, the entire region is divided into several small grids of uniform size, with the center (x0, y0, z0) of each grid representing the initial center position of the microlens. In reality, the true center position of each microlens is the initial center position plus a random offset X in both the X and Y directions. Offset Y Offset X Offset Y Offset and Z Offset Similarly, it varies randomly within a certain range. In this way, the random regularity of the spatial arrangement of the microlens array is achieved.

[0072] For each microlens, the surface profile along the Z direction can also be represented by a profile function:

[0073]

[0074] Where, ρ 2 =(x i -x0-X Offset ) 2 +(y i -y0-Y Offset ) 2 .

[0075] By randomizing the aforementioned parameters, each microlens acquires a random surface profile along the Z-direction. The microlens can be either concave or convex, without specific limitations. Transforming to the global coordinate system (X, Y, Z), the surface profile of the microlens array along the Z-direction is randomized across the entire substrate, achieving a uniform light distribution effect.

[0076] In a first embodiment of the light-diffusing component 10 of the present invention, the light-diffusing component 10 includes two light-diffusing sheets, and two light-diffusing structures are respectively disposed on one side of the two light-diffusing sheets, wherein the light-diffusing structure in any of the light-diffusing sheets is obtained by any of the above-mentioned randomized regularized microlens array methods.

[0077] It should be noted that in the first embodiment of the light-diffusing component 10 of the present invention, the two light-diffusing sheets are a first light-diffusing sheet 11 and a second light-diffusing sheet 12, and the two light-diffusing structures are a first light-diffusing structure 111 and a second light-diffusing structure 121. The light-diffusing structure on the first light-diffusing sheet 11 is the first light-diffusing structure 111, and the light-diffusing structure on the second light-diffusing sheet 12 is the second light-diffusing structure 121. The first light-diffusing sheet 11 is disposed between the light-emitting device 20 and the second light-diffusing sheet 12. The two light-diffusing structures in the two light-diffusing sheets are configured to face the same side and both are oriented towards the light-emitting device 20.

[0078] In other words, in the first embodiment of the light-diffusing component 10 of the present invention, the first light-diffusing structure 111 and the second light-diffusing structure 121 included in the first light-diffusing plate 11 and the second light-diffusing plate 12 of the light-diffusing component 10 can be set to be the same or different, so that the light field output by the light source 201 from the light-emitting device 20 after passing through the light-diffusing component 10 is the superposition of the modulation effect of the first light-diffusing structure 111 and the second light-diffusing structure 121 on the light field in the first light-diffusing plate 11 and the second light-diffusing plate 12, that is, the modulation response function of the first light-diffusing plate 11 and the second light-diffusing plate 12 on the light field is the convolution of the modulation response functions of the first light-diffusing plate 11 and the second light-diffusing plate 12 on the light field. Where h is the system's modulation response function, h1 is the modulation response function of the first homogenizer 11, and h2 is the modulation response function of the second homogenizer 12. It is the convolution symbol.

[0079] Therefore, the light-diffusing component 10 of the present invention can expand the angle range and achieve a large lens angle that is difficult to achieve with a single light-diffusing sheet. In addition, a specific light field distribution in a two-dimensional direction can be achieved by separately controlling the one-dimensional direction of the first light-diffusing sheet 11 or the second light-diffusing sheet 12 in the light-diffusing component 10 of the present invention, thereby breaking the mutual constraints between different directions and providing more diverse light field forms.

[0080] In addition, depending on the final light field requirements of different devices, different simple distributions can be made of the first light homogenizer 11 and / or the second light homogenizer 12 to achieve new light field distributions for different devices.

[0081] like Figure 3 The diagram shown is a structural schematic of the first embodiment of the light-diffusing component 10 of the present invention.

[0082] like Figure 4 The diagram shown is an optical path schematic of the first embodiment of the light-uniforming component 10 of the present invention.

[0083] like Figure 5a and 5b The image shown is a schematic diagram of the light spot structure of the first embodiment of the light-uniforming component 10 of the present invention during application.

[0084] As shown in the figure, after passing through the first light-diffusing plate 11, the light spot formed at 1m is as follows: Figure 5a After passing through the second light-diffusing plate 12, the angle of the light source 201 emerging from the light-diffusing component 10 is further expanded, forming a light spot at 1m, as shown in the image. Figure 5bAs shown in Figure 6, the light intensity distribution curves in the horizontal and vertical directions are also shown in Figure 6. Therefore, it can be seen that the first embodiment of the uniform light component 10 described in this invention can achieve a large field of view light field output.

[0085] The parameters of the first light-diffusing plate 11 and the second light-diffusing plate 12 are shown in Tables 1 and 2 below, respectively.

[0086]

[0087]

[0088] Table 1

[0089]

[0090] Table 2

[0091] It should be emphasized that in the first embodiment of the light-diffusing component 10 of the present invention, the first light-diffusing structure 111 is of the refractive type, and the second light-diffusing structure 121 is of the diffraction type. Besides this, those skilled in the art can determine the type and working principle of the first light-diffusing structure 111 and the second light-diffusing structure 121 according to the actual situation. For example, the first light-diffusing structure 111 can be set as diffraction type, and the second light-diffusing structure 121 as refractive type, or the first light-diffusing structure 111 and the second light-diffusing structure 121 can be set as scattering type and / or diffuse type, respectively. In other words, as long as the same or similar technical solutions are adopted based on the above disclosure of the present invention, the same or similar technical problems are solved, and the same or similar technical effects are achieved, they all fall within the protection scope of the present invention, and the specific embodiments of the present invention are not limited thereto.

[0092] like Figure 7 The diagram shown is a modified structural schematic of a first embodiment of the light-diffusing component 10' of the present invention. Unlike the first embodiment described above, the first light-diffusing structure 111' and the second light-diffusing structure 121' in the first light-diffusing sheet 11' and the second light-diffusing sheet 12' of the light-diffusing component 10' are arranged facing each other and located on the path of the light source 201 emitted by the light-emitting device 20.

[0093] In other words, in this modified embodiment, the light source 201 emitted by the light-emitting device 20 first reaches the side of the first light-diffusing plate 11' without the light-diffusing structure, then reaches the side with the light-diffusing structure, and then reaches the side of the second light-diffusing plate 12' with the light-diffusing structure. That is, the light source 201 emitted by the light-emitting device 20 continuously passes through the first light-diffusing structure 111' and the second light-diffusing structure 121' on the first light-diffusing plate 11' and the second light-diffusing plate 12', and the preset light field requirement is achieved through the modulation effect of the first light-diffusing structure 111' and the second light-diffusing structure 121' on the light source 201.

[0094] like Figure 8 The diagram shown is a structural schematic of another modified embodiment of the first embodiment of the light-diffusing component 10” of the present invention. Unlike the first embodiment described above, in this modified embodiment, the first light-diffusing structure 111” in the first light-diffusing sheet 11” and the second light-diffusing structure 121” in the second light-diffusing sheet 12” of the light-diffusing component 10” are arranged opposite to each other and located on the path of the light source 201 emitted by the light-emitting device 20.

[0095] In other words, in this alternative embodiment, the light source 201 emitted by the light-emitting device 20 first reaches the side of the first light-diffusing sheet 11” where the first light-diffusing structure 111” is provided, then reaches the side of the first light-diffusing sheet 11” where the light-diffusing structure is not provided, then reaches the side of the second light-diffusing sheet 12” where the second light-diffusing structure 121” is not provided, and finally the light source 201 passes through the side of the second light-diffusing sheet 12” where the second light-diffusing structure 121” is provided, thereby modulating the light source 201 emitted by the light-emitting device 20.

[0096] In addition, those skilled in the art can arbitrarily change the direction and position of the first light-diffusing structure 111 and the second light-diffusing structure 121 in the first light-diffusing sheet 11 and the second light-diffusing sheet 12 according to the actual situation. As long as the same or similar technical solutions are adopted on the basis of the above disclosure of the present invention, the same or similar technical problems are solved, and the same or similar technical effects are achieved, they all fall within the protection scope of the present invention. The specific embodiments of the present invention are not limited thereto.

[0097] like Figure 9 The diagram shown is a structural schematic of a second embodiment of the light-diffusing component 10A of the present invention.

[0098] like Figure 10 The diagram shown is an optical path schematic of a second embodiment of the light-uniforming component 10A of the present invention.

[0099] like Figure 11a and 11b The image shown is a schematic diagram of the light spot structure in the application process of the second embodiment of the light-uniforming component 10A of the present invention.

[0100] like Figure 12 The figure shown is a light intensity distribution curve in the horizontal and vertical directions during the application of the second embodiment of the light uniform component 10A of the present invention.

[0101] Unlike the first embodiment described above, in the second embodiment of the light-diffusing component 10A of the present invention, the first light-diffusing plate 11A and the second light-diffusing plate 12A are used to regulate the light source 201A emitted by the light-emitting device 20A from the horizontal and vertical directions respectively, and finally form a two-dimensional large-angle light field, thereby breaking the mutual constraint between the horizontal and vertical directions to form a two-dimensional light field at different angles.

[0102] In the second embodiment of the light-diffusing assembly 10A, the first light-diffusing structure 111A in the first light-diffusing sheet 11A and the second light-diffusing structure 121A in the second light-diffusing sheet 12A face the same side and are both set to face the side of the light-emitting device 20A, thereby modulating the light source 201A emitted by the light-emitting device 20A in the horizontal and vertical directions respectively.

[0103] As shown in the figure, the first light-diffusing plate 11A in the light-diffusing component 10A of the present invention is used to control the angle of the light source 201A emitted by the light-emitting device 20A in the horizontal direction. After being controlled by the first light-diffusing structure 111A in the first light-diffusing plate 11A, the light spot formed by the light source 201A emitted by the light-emitting device 20A at a distance of 1m is as follows. Figure 11a As shown, its light intensity distribution curve in the horizontal direction is as follows: Figure 12 As shown.

[0104] The second light-diffusing plate 12A is used to adjust the angle of the light source 201A emitted by the light-emitting device 20A in the vertical direction. After being adjusted by the second light-diffusing structure 121A in the second light-diffusing plate 12A, the light spot formed by the light source 201A emitted by the light-emitting device 20A at 1m is as follows: Figure 11b As shown, its light intensity distribution curve in the vertical direction is as follows: Figure 12 As shown.

[0105] It should be noted that in the second embodiment of the light-diffusing component 10A described in this invention, the first light-diffusing structure 111A in the first light-diffusing sheet 11A is a random array of micropillar lenses arranged along the X direction, and the second light-diffusing structure 121A in the second light-diffusing sheet 12A is a random array of micropillar lenses arranged along the Y direction. The specific parameters of the first light-diffusing structure 111A and the second light-diffusing structure 121A are shown in Tables 3 and 4.

[0106] variable Value Single lens X-direction dimension 30um Single lens Y-direction dimension 4mm Rx 0.005~0.015mm kx -1.32～-0.98 <![CDATA[X Offset ]]> -16~16um <![CDATA[Z Offset ]]> -0.002~0.002mm

[0107] Table 3

[0108]

[0109]

[0110] Table 4

[0111] like Figure 13 The diagram shown is a structural schematic of a third embodiment of the light-diffusing component 10B according to the present invention. Unlike the first embodiment described above, in the third embodiment of the light-diffusing component 10B, the first light-diffusing structure 111B and the second light-diffusing structure 121B are disposed on opposite sides of the same light-diffusing sheet to form a double-sided light-diffusing sheet.

[0112] In other words, in the third embodiment of the light-diffusing component 1B0 of the present invention, the first light-diffusing structure 111B and the second light-diffusing structure 121B are simultaneously disposed on opposite sides of the first light-diffusing sheet 11B. Since the first light-diffusing structure 111B and the second light-diffusing structure 121B are both randomly obtained by the above-mentioned randomized microlens array method, the first light-diffusing structure 111B and the second light-diffusing structure 121B on opposite sides of the first light-diffusing sheet 11B may be the same or different.

[0113] Furthermore, in the third embodiment of the light-diffusing component 10B described in this invention, since the light source 201 emitted by the light-emitting device 20 needs to be modulated by the first light-diffusing structure 111B and the second light-diffusing structure 121B, it is also possible to make the light field output by the light source 201 from the light-emitting device 20 after passing through the light-diffusing component 10B a superposition of the modulation effects of the first light-diffusing structure 111B and the second light-diffusing structure 121B on the light field. That is, the modulation response function of the double-sided light-diffusing sheet to the light field is the convolution of the modulation response functions of the first light-diffusing structure 111B and the second light-diffusing structure 121B to the light field.

[0114] like Figure 14 and Figure 15As shown, different light field patterns are generated by random variations of the light homogenizing component 10 according to the present invention.

[0115] In addition, those skilled in the art can modify the random variable parameters and design methods of the first light-diffusing structure 111 and the second light-diffusing structure 121 in the first light-diffusing sheet 11 and the second light-diffusing sheet 12 in the light-diffusing component 10 of the present invention according to the actual situation. As long as the same or similar technical solutions as the present invention are adopted, the same or similar technical problems as the present invention are solved, and the same or similar technical effects as the present invention are achieved, they all fall within the protection scope of the present invention. The specific embodiments of the present invention are not limited thereto.

[0116] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0117] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations of the embodiments of the present invention may be made without departing from the stated principles.

Claims

1. A light-monopolating component for modulating a light source emitted by a light-emitting device, characterized in that, The light uniformization assembly comprises a first light uniformization structure and a second light uniformization structure, which are arranged on at least one light uniformization sheet to modulate the shape and light intensity distribution of the far-field light spot of the light beam emitted by the light emitting device twice; wherein the first light uniformization structure is arranged to regulate the light emitted by the light emitting device in the horizontal direction, and the second light uniformization structure is arranged to regulate the light emitted by the light emitting device in the vertical direction, so as to form and expand a two-dimensional angle light field, break the mutual restriction between different directions, and provide diversified light field forms. The first light uniformization structure and the second light uniformization structure are designed by random regularized microlens array; the random variable of the random regularization includes the shape and size of the effective light aperture of the microlens, the spatial arrangement of the microlens, and the surface profile of the microlens array along the Z-axis direction. For each microlens, the surface profile along the Z direction can be represented by a surface profile function. wherein, p 2 = (x i - x0) 2 + (y i - y0) 2 ; R is the radius of curvature of the microlens; k is the conic constant; Aj is the asphericity coefficient, Z Offset is the offset of each microlens along the z-axis direction; Z Offset is independently randomly regularized from other random variables and ranges from -0.1 to 0.1 mm; The first uniform light structure and the second uniform light structure are arranged to realize light field output of expanded field of view; the single-lens size of the first uniform light sheet ranges from 32 μm to 72 μm, the value range of R is -0.025 mm to -0.01 mm, the value range of k is -1.32 to -0.88, and the value range of Z Offset is -0.001 mm to 0.001 mm; the single-lens size of the second uniform light sheet ranges from 40 μm to 122 μm, the value range of R is -0.042 mm to -0.013 mm, the value range of k is -1.1 to -0.97, and the value range of Z Offset is -0.004 mm to 0.004 mm.

2. The light uniformization assembly according to claim 1, wherein the first light uniformization structure and the second light uniformization structure are arranged on opposite sides of the light uniformization sheet to form a double-sided light uniformization sheet, so as to modulate the light source emitted by the light emitting device twice by the first light uniformization structure and the second light uniformization structure.

3. The light uniformization assembly according to claim 1, wherein the first light uniformization structure is refractive, and the second light uniformization structure is diffractive.

4. The light uniformization assembly according to claim 1, wherein the light uniformization assembly comprises a first light uniformization sheet and a second light uniformization sheet, the first light uniformization structure is arranged on one side of the first light uniformization sheet, and the second light uniformization structure is arranged on one side of the second light uniformization sheet, so as to modulate the light source emitted by the light emitting device twice by the first light uniformization structure and the second light uniformization structure.

5. The light uniformization assembly according to claim 4, wherein the first light uniformization structure and the second light uniformization structure are arranged on the same side of the first light uniformization sheet and the second light uniformization sheet respectively, and are both arranged on the side facing the light emitting device, wherein the first light uniformization sheet is located between the light emitting device and the second light uniformization sheet.

6. The light uniformization assembly according to claim 4, wherein the first light uniformization structure in the first light uniformization sheet and the second light uniformization structure in the second light uniformization sheet are arranged oppositely, so as to modulate the light source emitted by the light emitting device twice by the first light uniformization structure and the second light uniformization structure.

7. The light uniformization assembly according to claim 4, wherein the first light uniformization structure in the first light uniformization sheet and the second light uniformization structure in the second light uniformization sheet are arranged oppositely, and the first light uniformization structure and the second light uniformization structure modulate the light source emitted by the light emitting device twice.

8. The light uniformization assembly according to claim 4, wherein the first light uniformization structure is refractive, and the second light uniformization structure is diffractive.

9. The light uniformization assembly according to claim 8, wherein the first light uniformization structure and the second light uniformization structure are designed by random regularized microlens array.

10. The light homogenizing assembly of claim 9, wherein the first light homogenizing structure is a random microlens array arranged along an X direction, and the second light homogenizing structure is a random microlens array arranged along a Y direction.

11. The light homogenizing assembly of claim 10, wherein the first light homogenizing structure is refractive, and the second light homogenizing structure is diffractive.

12. The light homogenizing assembly of claim 11, wherein the first light homogenizing structure and the second light homogenizing structure are both designed by a random regularized microlens array.

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