Microlens array structure, lighting module and vehicle lamp for realizing rectangular light pattern
By designing a microlens unit array with different contour curvatures, forming a rectangular virtual image distribution area and using an imaging unit for imaging, the problem of complex and high cost of rectangular light type implementation in the prior art is solved, and efficient and uniform rectangular light type generation is achieved.
Patent Information
- Application Number
- CN202420595909.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-25
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-03-25
AI Technical Summary
When implementing rectangular light type, the process is complex and costly, or although the cost is relatively low, the process is simple, making it difficult to meet the efficient implementation of rectangular light type.
By designing a plurality of microlens unit arrays, each microlens unit includes an incoming unit and an imaging unit. The contour curvatures of the incoming unit in the vertical and horizontal planes are different to form a rectangular virtual image distribution area. The virtual image is imaged by the imaging unit, and finally a rectangular light type with uniform illuminance is formed.
It realizes efficient generation of rectangular light types, uniform illuminance values, simple process and low cost.
Smart Images
Figure CN222747121U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile lamps, and in particular to a micro lens array structure for realizing a rectangular light pattern. In addition, it also relates to a lighting module and an automobile lamp. Background Art
[0002] The existing solutions for realizing rectangular light types include the following: conventional MLA technology, in which the pattern is rectangular; a microlens array is formed by an array of anisotropic lens units; the light incident unit in the microlens array has a rectangular outline, and the imaging unit directly images the light incident unit; the imaging unit images a square object, and the projection pattern of the imaging unit is rectangular; for the existing first solution: the conventional MLA technology is still used, but the process of this technology is complex and the cost is high; for the existing second to fourth solutions: the cost is lower than that of the first solution, and the process is relatively simple. Utility Model Content
[0003] The utility model aims to solve at least one of the technical problems existing in the prior art.
[0004] To this end, the utility model provides a microlens array structure for realizing a rectangular light pattern, which can present a rectangular light pattern through a novel virtual image imaging structure.
[0005] According to the first aspect of the utility model, a microlens array structure for realizing a rectangular light type is provided, comprising a plurality of microlens units, wherein the plurality of microlens units are arranged in an array, each of the microlens units comprises a light incident unit and an imaging unit, the light incident unit and the imaging unit are arranged in sequence in a positive direction along a light emitting direction, and the curvature of the contour line of the light incident unit in a vertical plane is different from the curvature of the contour line in a horizontal plane, so that the light incident unit forms a rectangular virtual image distribution area at a focal plane, and the imaging unit is suitable for imaging the virtual image distribution area formed by the light incident unit at the focal plane.
[0006] Preferably, the contour line of the light incident unit in the vertical plane is L1, and the height of the reverse extension line of the refracted light after a beam of parallel incident light is refracted through the contour line L1 in the light distribution area on the focal plane of the imaging unit is H, and H is the height of the virtual image of the light incident unit on the focal plane in the vertical direction.
[0007] Further preferably, the contour line of the light incident unit in the horizontal plane is L2, and the width of the light distribution area of the reverse extension line of the refracted light after a beam of the parallel incident light is refracted through the contour line L2 on the focal plane of the imaging unit is W, and W is the width of the virtual image of the light incident unit on the focal plane in the horizontal direction.
[0008] Preferably, a curvature of a contour line of the light incident unit in a vertical plane is smaller than a curvature of a contour line of the light incident unit in a horizontal plane.
[0009] Further preferably, a height of a virtual image of the light incident unit on a focal plane in a vertical direction is smaller than a width of a virtual image of the light incident unit on a focal plane in a horizontal direction.
[0010] Preferably, the imaging unit is a lens, and a beam of the parallel incident light rays is suitable for converging at a focus of the lens after passing through the imaging unit in the reverse direction.
[0011] The beneficial effect of the utility model is that the microlens array is composed of a plurality of microlens units arranged in an array, and each microlens unit includes an entrance unit and an imaging unit, and the curvature of the contour line of the entrance unit in the horizontal plane and the vertical plane is adjusted so that the virtual image formed by the entrance unit at the focal plane is rectangular, and then the virtual image is imaged by the imaging unit, and the illumination value in the range of the imaging light pattern finally formed is uniform, and the processing technology of the microlens array is simple and the cost is low.
[0012] The second aspect of the utility model provides an illumination module, which adopts the microlens array structure for realizing a rectangular light pattern described in the first aspect of the utility model.
[0013] A third aspect of the present invention provides a vehicle lamp, which adopts a lighting module provided by the second aspect of the present invention.
[0014] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures specifically pointed out in the description, claims and drawings.
[0015] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0017] Figure 1 This is a schematic structural diagram of a microlens array structure for realizing a rectangular light pattern according to the present invention;
[0018] Figure 2 It is a light principle diagram of a microlens unit of a microlens array structure for realizing a rectangular light pattern in a vertical plane of the utility model;
[0019] Figure 3This is a principle diagram of light rays in a horizontal plane of a microlens unit of a microlens array structure for realizing a rectangular light pattern according to the utility model.
[0020] Reference numerals
[0021] 1. Microlens unit; 11. Light input unit; 12. Imaging unit. DETAILED DESCRIPTION
[0022] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.
[0023] In the description of the present invention, it should be understood that the terms "top", "bottom", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.
[0024] See also Figure 1 A microlens array structure for realizing a rectangular light type in a specific embodiment of the utility model includes a plurality of microlens units 1, and the plurality of microlens units 1 are arranged in an array, and each of the microlens units 1 includes a light input unit 11 and an imaging unit 12, wherein the light input unit 11 and the imaging unit 12 are sequentially arranged in a forward direction along the light output direction, so that the light emitted by the light source is first refracted by the light input unit 11, and then imaged by the imaging unit 12. Moreover, the curvature of the contour line of the light input unit 11 in the vertical plane is different from the curvature of the contour line in the horizontal plane. Therefore, when the light passes through the contour line of the light input unit 11 and is refracted, the refracted light forms a rectangular virtual image distribution area at the focal plane, and then the virtual image distribution area formed by the light input unit 11 at the focal plane is imaged by the imaging unit 12. The imaging unit 12 is configured as a lens, and when a beam of parallel incident light passes through the imaging unit 12 in the reverse direction, it is suitable for converging at the focus F of the lens.
[0025] Specifically, see Figure 2In order to finally form a rectangular light pattern, it is necessary to set the curvature of the contour line of the light input unit 11 in the horizontal plane and the vertical plane. For example, the contour line of the light input unit 11 in the vertical plane is set to L1. When a beam of parallel incident light emitted by the light source enters the light input unit 11 and is refracted by the contour line L1 of the light input unit 11, the height of the light distribution area of the reverse extension line of the refracted light on the focal plane of the imaging unit 12 is H, and the height H is the height of the virtual image of the light input unit 11 on the focal plane in the vertical direction.
[0026] See also Figure 3 , the contour line of the light incident unit 11 in the horizontal plane is set to L2. When a beam of parallel incident light enters the incident light unit and is refracted by the contour line L2 of the light incident unit 11, the width of the light distribution area of the reverse extension line of the refracted light on the focal plane of the imaging unit 12 is W, and the width W is the width of the virtual image of the light incident unit 11 on the focal plane in the horizontal direction.
[0027] More specifically, the height of the virtual image of the light incident unit 11 on the focal plane in the vertical direction is smaller than the width of the virtual image of the light incident unit 11 on the focal plane in the horizontal direction, so that the virtual image formed by the light incident unit 11 can be formed into a rectangular shape when the imaging unit 12 forms an image. Of course, the height of the virtual image of the light incident unit 11 on the focal plane in the vertical direction can also be set to be greater than the width of the virtual image of the light incident unit 11 on the focal plane in the horizontal direction, so that the virtual image formed is rectangular.
[0028] The utility model provides an illumination module, which adopts the microlens array structure for realizing a rectangular light pattern as described in any of the above embodiments of the utility model.
[0029] The utility model provides a vehicle lamp, which adopts the lighting module described in any one of the above embodiments of the utility model.
[0030] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
[0031] The above description is based on the ideal embodiment of the utility model. Through the above description, relevant staff can make various changes and modifications without deviating from the technical concept of the utility model. The technical scope of the utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. A microlens array structure for realizing a rectangular light pattern, characterized in that: The invention comprises a plurality of microlens units (1), wherein the plurality of microlens units (1) are arranged in an array, each of the microlens units (1) comprises a light input unit (11) and an imaging unit (12), the light input unit (11) and the imaging unit (12) are sequentially arranged in a positive direction along a light output direction, and the curvature of the contour line of the light input unit (11) in a vertical plane is different from the curvature of the contour line in a horizontal plane, so that the light input unit (11) forms a rectangular virtual image distribution area at a focal plane, and the imaging unit (12) is suitable for imaging the virtual image distribution area formed by the light input unit (11) at the focal plane.
2. The microlens array structure for realizing a rectangular light pattern according to claim 1, characterized in that: The contour line of the light input unit (11) in the vertical plane is L1, and the height of the light distribution area of the reverse extension line of the refracted light after a beam of parallel incident light is refracted through the contour line L1 on the focal plane of the imaging unit (12) is H, and H is the height of the virtual image of the light input unit (11) on the focal plane in the vertical direction.
3. The microlens array structure for realizing a rectangular light pattern according to claim 2, characterized in that: The contour line of the light input unit (11) in the horizontal plane is L2, and the width of the light distribution area of the reverse extension line of the refracted light after a beam of parallel incident light is refracted through the contour line L2 on the focal plane of the imaging unit (12) is W, and W is the width of the virtual image of the light input unit (11) on the focal plane in the horizontal direction.
4. The microlens array structure for realizing a rectangular light pattern according to claim 3, characterized in that: The curvature of the contour line of the light incident unit (11) in the vertical plane is smaller than the curvature of the contour line of the light incident unit (11) in the horizontal plane.
5. The microlens array structure for realizing a rectangular light pattern according to claim 4, characterized in that: The height of the virtual image of the light incident unit (11) on the focal plane in the vertical direction is smaller than the width of the virtual image of the light incident unit (11) on the focal plane in the horizontal direction.
6. The microlens array structure for realizing a rectangular light pattern according to claim 5, characterized in that: The imaging unit (12) is a lens, and a beam of parallel incident light rays is suitable for converging at the focus of the lens after passing through the imaging unit (12) in the reverse direction.
7. A lighting module, characterized in that: A microlens array structure for realizing a rectangular light pattern as described in any one of claims 1 to 6 is adopted.
8. A vehicle lamp, characterized in that: Comprising the lighting module described in claim 7.