Ultrathin high-directivity and high-uniformity grid projection light source
By setting up an ultra-thin high-pointing and high uniform grid projection light source with a grid pattern on the light guide plate, the problem of difficulty in detecting concave and convex marks of mirror objects in the prior art is solved, and the detection effect of high accuracy and reliability is achieved.
Patent Information
- Application Number
- CN202420859548.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-04-23
AI Technical Summary
It is difficult for the prior art to accurately detect concave and convex scratches of mirror objects, traditional methods are easily affected by subjective factors and conventional lighting sources are difficult to show concave and convex scratches.
An ultra-thin high-pointing and high uniform grid projection light source is designed. By setting a grid pattern formed by several black lines on the light guide plate, the light reflected by the object to be measured enters the light guide plate, and the concave and convex scratches are presented in curved form, making it easy for camera to collect.
It improves the accuracy and reliability of concave and convex scratch detection, is suitable for large-scale promotion and application, and simplifies the detection process.
Smart Images
Figure CN222579965U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of machine vision, in particular to an ultra-thin high-directional and high-uniform grid projection light source. Background Art
[0002] Detection of concave and convex scratches on mirrored objects such as mirrors, metal sheets, films, glass liquid crystal parts, etc. has always been an important technical challenge faced by the manufacturing industry and related fields. These mirrored objects may be affected by various factors during production, processing, transportation and use, resulting in surface defects such as concave and convex scratches. These defects not only affect the appearance quality of the product, but may also have a serious impact on the performance and service life of the product.
[0003] Traditional methods for detecting concave and convex scratches mainly rely on manual visual inspection or the use of cameras and conventional lighting sources, but these methods have many shortcomings. For example, manual visual inspection is easily affected by subjective factors and it is difficult to accurately identify small or complex scratches; and when using conventional lighting sources, such as coaxial light sources, the surface of the mirrored object is often evenly illuminated, making it difficult for the camera to detect concave and convex scratches.
[0004] Therefore, the detection of concave and convex scratches on mirror objects is a challenging and important technical problem. We aim to solve this technical problem through continuous research and innovation, and provide strong technical support for the development of manufacturing and related fields.
[0005] The above information is presented as background information only to assist with understanding the present disclosure and no determination or admission is made as to whether any of the above may be used as prior art with respect to the present disclosure. Utility Model Content
[0006] The utility model provides an ultra-thin high-directional and high-uniform grid projection light source to solve the problems existing in the prior art.
[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0008] An ultra-thin high-directivity and high-uniform grid projection light source comprises a housing, four light panels and a light guide plate; wherein:
[0009] The light board and the light guide plate are both arranged in the housing;
[0010] The four light boards are arranged around the four side surfaces of the light guide plate, and the light emitting surface of the light board is a surface of the light board facing the light guide plate;
[0011] The light emitting surface of the light guide plate is perpendicular to the light emitting surface of the lamp board, and a grid pattern formed by a plurality of black lines arranged at intervals is arranged on the other surface of the light guide plate opposite to the light emitting surface.
[0012] Further, in the ultra-thin high-directivity and high-uniformity grid projection light source, the housing includes a main body and a cover plate;
[0013] Both the main body and the cover plate are in a zigzag shape;
[0014] The cover plate is fixedly connected to the main body through a fixing connector.
[0015] Further, in the ultra-thin high-directivity and high-uniformity grid projection light source, tempered glass is provided on the surface of the light guide plate where the grid pattern is arranged.
[0016] Further, in the ultra-thin high-directivity and high-uniformity grid projection light source, an anti-reflection film is plated on the tempered glass.
[0017] Further, the ultra-thin high-directivity and high-uniformity grid projection light source further includes four condenser grating bars;
[0018] One of the condenser grating bars is provided in front of the light-emitting surface of each light board.
[0019] Further, in the ultra-thin high-directivity and high-uniformity grid projection light source, the light board is an RGB three-color light board, and the RGB three-color light beads on the RGB three-color light board can be controlled separately.
[0020] Further, in the ultra-thin high-directivity and high-uniformity grid projection light source, the black lines include light-impermeable black ink and diffusely reflective matte white ink;
[0021] The matte white ink is provided on the light guide plate, and the black ink is provided on the matte white ink.
[0022] Further, the ultra-thin high-directivity and high-uniformity grid projection light source further includes a diffusion glass;
[0023] The diffusion glass is provided on the light-emitting surface of the light guide plate.
[0024] Further, in the ultra-thin high-directivity and high-uniformity grid projection light source, a plurality of atomization stripes or a plurality of frosted stripes are provided on the diffusion glass;
[0025] The plurality of atomization stripes or the plurality of frosted stripes correspond to the plurality of black lines one by one.
[0026] Further, in the ultra-thin high-directivity and high-uniformity grid projection light source, an installation through-hole is provided on the housing in a direction parallel to the plane where the light-emitting surface is located;
[0027] In a direction perpendicular to the plane where the light emitting surface is located, the shell is provided with a strip groove, and a mounting nut is slidably arranged in the strip groove.
[0028] Compared with the prior art, the utility model has the following beneficial effects:
[0029] The utility model provides an ultra-thin high-directivity and high-uniform grid projection light source. By arranging a grid pattern formed by a plurality of black lines arranged at intervals on a light guide plate, when light is projected onto an object to be measured, light reflected by the object to be measured enters the light guide plate, and the concave and convex scratches on the object to be measured are presented in the form of curves on the grid pattern, which can be captured and imaged by a camera to realize the detection of concave and convex scratches on mirror objects, thereby improving the accuracy and reliability of the detection technology and being suitable for large-scale promotion and application.
[0030] The present invention has other characteristics and advantages, which will be apparent from the accompanying drawings and subsequent specific embodiments incorporated herein, or will be described in detail in the accompanying drawings and subsequent specific embodiments incorporated herein, which together are used to explain the specific principles of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0032] Figure 1 This is a schematic diagram of the structure decomposition of an ultra-thin, highly directional, and highly uniform grid projection light source provided by an embodiment of the utility model;
[0033] Figure 2 This is a schematic diagram of the structural assembly of an ultra-thin, highly directional, and highly uniform grid projection light source provided by an embodiment of the utility model;
[0034] Figure 3 yes Figure 2 The enlarged structural diagram at A in the middle;
[0035] Figure 4 yes Figure 2 The enlarged structural diagram at A in the middle;
[0036] Figure 5 It is a schematic diagram of the object to be measured in the utility model;
[0037] Figure 6It is a schematic diagram in which the concave and convex scratches on the object to be measured in the utility model are clearly displayed in the form of curves;
[0038] Figure 7 It is a schematic diagram in which the concave and convex scratches on the object to be measured are difficult to present in the utility model.
[0039] Reference numerals:
[0040] Housing 1, lamp board 2, light guide plate 3, tempered glass 4, focusing grating bar 5, diffusion glass 6, mounting through hole 7, strip groove 8, mounting nut 9;
[0041] Main body 101 and cover plate 102 . DETAILED DESCRIPTION
[0042] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.
[0043] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.
[0044] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.
[0045] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.
[0046] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.
[0047] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.
[0048] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.
[0049] In the description of the embodiments of the present application, space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the referred device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.
[0050] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.
[0051] Embodiment 1
[0052] In view of the above-mentioned defects in the prior art, the applicant, based on many years of rich practical experience and professional knowledge in design and manufacturing in this field, and in conjunction with the application of theory, actively conducts research and innovation in the hope of creating a technology that can solve the defects in the prior art. After continuous research and design, and after repeated trial production and improvement, the present utility model with real practical value was finally created.
[0053] Please refer to Figure 1-2 The embodiment of the utility model provides an ultra-thin high-directional and high-uniform grid projection light source, including a housing 1, four light panels 2 and a light guide plate 3; wherein,
[0054] The light board 2 and the light guide plate 3 are both arranged in the housing 1;
[0055] The four light boards 2 are arranged around the four sides of the light guide plate 3, and the light emitting surface of the light board 2 is the surface of one side of the light board 2 facing the light guide plate 3;
[0056] The light emitting surface of the light guide plate 3 is perpendicular to the light emitting surface of the lamp board 2 , and a grid pattern formed by a plurality of black lines arranged at intervals is provided on the other side of the light guide plate 3 opposite to the light emitting surface.
[0057] It should be noted that the core of this embodiment is to carefully lay out a series of grid patterns composed of black lines arranged at intervals on the light guide plate 3. This design not only makes the light source have the characteristics of high directivity and high uniformity, but also its special grid structure makes the light projected onto the object to be measured, such as a metal plate, Figure 5 As shown, after the light reflected by the object to be measured re-enters the light guide plate 3 , the concave and convex scratches on the object to be measured can be presented on the grid pattern of the light guide plate 3 in a specific manner.
[0058] Specifically, when this grid projection light source acts on a mirror object, the concave and convex scratches on the mirror object will be clearly displayed on the grid pattern of the light guide plate 3 in the form of curves, such as Figure 6 As shown, when using a conventional coaxial light source, the concave and convex scratches are difficult to show, such as Figure 7 This effect facilitates the subsequent camera acquisition and imaging, allowing the camera to accurately capture and record these curve shapes after focusing on the grid pattern of the light guide plate 3 (without having to focus on the surface of the object under test through the transparent part of the light guide plate 3). By comparing and analyzing these image data, accurate detection of concave and convex scratches on mirror objects can be achieved.
[0059] Compared with traditional detection methods, the utility model not only significantly improves the accuracy and reliability of detection, but also is easy to operate and suitable for large-scale popularization and application. Whether in the quality control link of the manufacturing industry or in the precise measurement in the scientific research field, the utility model has demonstrated great application potential and value.
[0060] Please refer to again Figure 1 , in this embodiment, the housing 1 includes a main body 101 and a cover plate 102;
[0061] Both the main body 101 and the cover plate 102 are in a zigzag shape;
[0062] The cover plate 102 is fixedly connected to the main body 101 through a fixing connector.
[0063] It should be noted that the main body 101, as the main part of the housing, its zigzag design not only ensures an aesthetically pleasing appearance, but also has good structural stability and durability. This provides effective protection for the internal light source and other components, and at the same time facilitates the installation and use by the user. The cover plate 102 plays a role of closing and protecting, and its zigzag structure matches that of the main body 101, enabling the two to be closely combined together.
[0064] In order to realize the fixed connection between the cover plate 102 and the main body 101, a fixing connector is adopted. This connector can be either a mechanical fixing method such as screws and buckles, or a chemical fixing method such as adhesives. The specific choice depends on the actual application scenario and installation requirements. The use of the fixing connector ensures that the connection between the cover plate 102 and the main body 101 is firm and reliable, and is not easy to loosen or fall off.
[0065] Please refer to again Figure 1 , in this embodiment, a tempered glass 4 is provided on the side of the light guide plate 3 where the grid pattern is provided.
[0066] It should be noted that in order to ensure the stability and durability of the grid pattern and further improve the overall performance of the light source, we have installed a tempered glass 4 on the side of the light guide plate 3 where the grid pattern is provided.
[0067] The tempered glass 4, with its high strength, high transparency and excellent heat resistance, provides effective protection for the grid pattern. It can prevent the grid pattern from being scratched, worn and other damages during use, thus ensuring the stability and durability of the light source. At the same time, the high transparency of the tempered glass 4 ensures unobstructed light transmission, thus ensuring that the imaging acquisition of the grid pattern by the camera is not affected.
[0068] In addition, the installation of the tempered glass 4 also enhances the stability and reliability of the entire light source structure, making the connection between the light guide plate 3 and other components such as the housing tighter and reducing the risk of loosening or deformation due to vibration or external force.
[0069] In this embodiment, an anti-reflection film is plated on the tempered glass 4 .
[0070] It should be noted that the anti-reflection film is an optical film whose main function is to reduce the loss of light when it is reflected on the surface of the medium, thereby increasing the transmittance of light.
[0071] Specifically, the anti-reflection film creates a phase difference between the reflected light and the transmitted light through the interference effect, which then cancels out each other, thereby reducing the reflection of light.
[0072] In addition, the application of anti-reflection film also makes the entire light source system more energy-efficient and environmentally friendly. Due to the reduction of light reflection loss, the light source consumes less electricity when emitting light of the same brightness, which helps to reduce energy consumption and carbon emissions.
[0073] Please refer again Figure 1 In this embodiment, the ultra-thin high-directivity and high-uniform grid projection light source further includes four focusing grating strips 5;
[0074] A focusing grating strip 5 is arranged in front of the light-emitting surface of each light panel 2 .
[0075] It should be noted that the main function of the focusing grating bar 5 is to focus and regulate light. When the light emitted by the light panel 2 passes through the focusing grating bar 5, the grating bar can focus it into a more concentrated and uniform light beam, thereby enhancing the directivity of the light source.
[0076] At the same time, the focusing grating strip 5 can also perform uniform processing on the light. By adjusting the parameters and structure of the grating strip, the light can be distributed more evenly in the projection area, avoiding the detection error caused by uneven light distribution. This feature is particularly important for the detection of large-area or complex-shaped mirror objects.
[0077] In addition, the introduction of the focusing grating strips 5 does not increase the overall thickness of the light source, so its ultra-thin design feature can still be maintained, which makes the entire light source system more lightweight and compact, and easy to integrate into various detection equipment and systems.
[0078] In this embodiment, the light board 2 is an RGB three-color light board, and the RGB three-color lamp beads on the RGB three-color light board can be controlled individually.
[0079] It should be noted that RGB, namely the three primary colors of red, green and blue, can present a rich variety of colors by mixing them in different proportions. The RGB three-color lamp beads are integrated on the light board and individually controlled by the control system, so that the light source can emit light of different colors.
[0080] This design brings many advantages. First, the application of RGB three-color light board greatly broadens the scope of application of light source. In the detection of concave and convex scratches on mirror objects, it is sometimes necessary to adjust the color of the light source according to different materials and scratch characteristics to obtain the best detection effect. RGB three-color light board can flexibly switch the color of the light source to meet different detection needs.
[0081] Secondly, the individual control of the RGB three-color lamp beads allows the brightness, color temperature and other parameters of the light source to be fine-tuned. By precisely controlling the luminous intensity and color ratio of each lamp bead, a high degree of customization and optimization of the light source can be achieved. This helps to improve the accuracy and stability of detection and reduce errors caused by mismatched light source parameters.
[0082] In addition, the RGB three-color light board also has the advantages of energy saving and environmental protection. Due to the use of efficient LED lamp beads and intelligent control systems, the light source can maintain low energy consumption and heat generation while emitting high-quality light. This not only reduces the cost of use, but also helps to extend the service life of the light source.
[0083] In this embodiment, the black lines include opaque black ink and diffusely reflective matte white ink;
[0084] The matte white ink is disposed on the light guide plate 3 , and the black ink is disposed on the matte white ink.
[0085] It should be noted that the combined use of these two inks enables the grid pattern to block light while also having a certain light diffuse reflection capability.
[0086] Specifically, matte white ink is first placed on the light guide plate 3 to form a basic grid structure. The diffuse reflection characteristics of matte white ink allow light to be evenly scattered when passing through, avoiding direct penetration and strong reflection of light. This design helps reduce the brightness loss of the light source and improve the utilization efficiency of light.
[0087] Subsequently, black ink is precisely applied over matte white ink to form the black lines in the grid pattern. The opacity of black ink ensures that light is effectively blocked when passing through the grid pattern, thus forming a grid effect of alternating light and dark. This design not only makes the directionality of the light source clearer, but also enhances the contrast during the detection of concave and convex scratches, making the scratch details more clearly visible.
[0088] Please refer again Figure 1 In this embodiment, the ultra-thin high-directivity and high-uniform grid projection light source further includes a diffusion glass 6;
[0089] The diffusion glass 6 is disposed on the light emitting surface of the light guide plate 3 .
[0090] It should be noted that, in order to further improve the uniformity and softness of the light source, this embodiment particularly introduces the design of diffusion glass 6. The diffusion glass 6 is cleverly arranged on the light emitting surface of the light guide plate 3, that is, the key position before the light is emitted from the light guide plate 3 and projected onto the object to be measured.
[0091] The main function of the diffusion glass 6 is to diffuse the light emitted by the light guide plate 3. Its special material and surface structure cause the light to scatter when passing through, thereby achieving uniform distribution of light. This design effectively avoids the problem of uneven illumination caused by local overbrightness or overdarkness of the light source, and ensures that every area on the object being measured can obtain uniform and soft illumination.
[0092] In addition, the diffusion glass 6 can also filter out stray light and glare in the light to a certain extent, thereby improving the purity and contrast of the light source, making details such as concave and convex scratches more clearly visible during detection, further improving the accuracy and reliability of detection.
[0093] In this embodiment, the diffusion glass 6 is provided with a plurality of atomized stripes or a plurality of frosted stripes;
[0094] The plurality of atomized stripes or the plurality of frosted stripes correspond to the plurality of black lines one by one.
[0095] It should be noted that, specifically, the black lines on the light guide plate 3 play a role in shielding and defining the light path, and the atomized stripes or frosted stripes on the diffusion glass 6 further adjust the direction and intensity of the light on this basis. This combination enables the light to present a more uniform and soft effect when projected onto the object to be measured.
[0096] It is understandable that atomized stripes are made by chemical reactions, such as using precision mold positioning and chemical dissolution technology to create micro-concave and convex surfaces on the glass surface. Frosted stripes are made by mechanical methods, such as sandblasting or grinding, to grind a layer of the glass surface into a frosted texture.
[0097] Please refer to Figure 3-4 In this embodiment, the housing 1 is provided with a mounting through hole 7 in a direction parallel to the plane where the light emitting surface is located;
[0098] In a direction perpendicular to the plane where the light emitting surface is located, the housing 1 is provided with a strip groove 8, and a mounting nut 9 is slidably arranged in the strip groove.
[0099] It should be noted that the design of the housing 1 fully reflects flexibility and diversity to meet the installation requirements of different users. Specifically, by cleverly opening the installation through hole 7, the strip groove 8 and the installation nut 9 on the housing 1, two installation methods in different directions are provided for the user.
[0100] First, the design of the mounting through hole 7 allows the light source to be installed in a direction parallel to the light emitting surface. Users can fix the light source on a horizontal plane or other parallel planes through the mounting through hole 7. This installation method is suitable for scenes where the light source needs to be installed on a plane or a bracket. The position and size of the mounting through hole 7 are precisely calculated, which not only ensures the stability of the installation, but also facilitates users to quickly install.
[0101] Secondly, the combination of the strip groove 8 and the mounting nut 9 provides the user with another installation method perpendicular to the light emitting surface. The user can slide the mounting nut 9 in the strip groove 8 to adjust its position as needed, and then fix the light source on a horizontal plane or other parallel planes. This installation method is particularly suitable for scenes with limited space in the vertical direction or where the light source angle needs to be flexibly adjusted. The opening of the strip groove 8 allows the mounting nut 9 to slide freely within a certain range, providing users with greater installation flexibility and convenience.
[0102] The combination of these two installation methods enables the ultra-thin, highly directional, and highly uniform grid projection light source in this embodiment to adapt to more diverse installation environments and requirements. Users can choose the appropriate installation method according to the actual scenario to achieve fast, stable, and flexible installation of the light source. This not only improves the convenience of using the light source, but also expands its application range, enabling it to better serve the task of detecting concave and convex scratches on various mirror objects.
[0103] Although the terms such as housing, lamp panel, light guide plate, tempered glass, and focusing grating strip are used more frequently in this application, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.
[0104] The utility model provides an ultra-thin high-directivity and high-uniform grid projection light source. By arranging a grid pattern formed by a plurality of black lines arranged at intervals on a light guide plate, when light is projected onto an object to be measured, light reflected by the object to be measured enters the light guide plate, and the concave and convex scratches on the object to be measured are presented in the form of curves on the grid pattern, which can be captured and imaged by a camera to realize the detection of concave and convex scratches on mirror objects, thereby improving the accuracy and reliability of the detection technology and being suitable for large-scale promotion and application.
[0105] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concept of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.
Claims
1. An ultra-thin, highly directional, highly uniform grid projection light source, characterized in that: It includes a housing (1), four lamp boards (2) and a light guide plate (3); among them, the lamp boards (2) and the light guide plate (3) are both arranged inside the housing (1); the four lamp boards (2) are arranged around the four side surfaces of the light guide plate (3), and the light-emitting surface of the lamp board (2) is the surface of the lamp board (2) facing the light guide plate (3); the light-emitting surface of the light guide plate (3) is perpendicular to the light-emitting surface of the lamp board (2), and a grid pattern formed by a plurality of black lines arranged at intervals is provided on the other surface of the light guide plate (3) opposite to the light-emitting surface.
2. The ultra-thin high-directional and high-uniform grid projection light source according to claim 1, characterized in that: The housing (1) includes a main body (101) and a cover plate (102); both the main body (101) and the cover plate (102) are in a shape of a Chinese character 'hui'; the cover plate (102) is fixedly connected to the main body (101) through a fixing connector.
3. The ultra-thin high-directional and high-uniform grid projection light source according to claim 1, characterized in that: A tempered glass (4) is provided on the surface of the light guide plate (3) where the grid pattern is provided.
4. The ultra-thin high-directional and high-uniform grid projection light source according to claim 3, characterized in that: An anti-reflection film is plated on the tempered glass (4).
5. The ultra-thin high-directional and high-uniform grid projection light source according to claim 1, characterized in that: It further includes four condenser grating bars (5); One of the condenser grating bars (5) is provided in front of the light-emitting surface of each lamp board (2).
6. The ultra-thin high-directional and high-uniform grid projection light source according to claim 1, characterized in that: The lamp board (2) is an RGB three-color lamp board, and the RGB three-color lamp beads on the RGB three-color lamp board can be controlled independently.
7. The ultra-thin high-directional and high-uniform grid projection light source according to claim 1, characterized in that: The black lines include light-impermeable black ink and diffusely reflective matte white ink; the matte white ink is provided on the light guide plate (3), and the black ink is provided on the matte white ink.
8. The ultra-thin high-directivity and high-uniform grid projection light source according to claim 1, characterized in that: It further includes a diffusion glass (6); the diffusion glass (6) is provided on the light-emitting surface of the light guide plate (3).
9. The ultra-thin high-directional and high-uniform grid projection light source according to claim 8, characterized in that: A plurality of atomization stripes or a plurality of frosted stripes are provided on the diffusion glass (6); the plurality of atomization stripes or the plurality of frosted stripes correspond to the plurality of black lines one by one.
10. The ultra-thin high-directivity and high-uniform grid projection light source according to claim 1, characterized in that: In the direction parallel to the plane where the light-emitting surface is located, the housing (1) is provided with an installation through hole (7); In the direction perpendicular to the plane where the light-emitting surface is located, the housing (1) is provided with a strip-shaped groove (8), and a mounting nut (9) is slidably arranged in the strip-shaped groove.