Optical structure and ADB light pattern designed using the same
By designing an optical structure combining LED light source and lens, the resolution and uniformity issues of traditional ADB modules were solved, achieving high-resolution and high-uniformity ADB light patterns, reducing processing costs and improving product consistency.
Patent Information
- Application Number
- CN202422951103.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-02
AI Technical Summary
Traditional silicone-based ADB modules suffer from limitations such as large LED size leading to difficulty in improving resolution, and limitations in the processing of silicone teeth within the silicone lens resulting in reduced luminous efficiency and uniformity issues. Furthermore, the lens pattern is easily worn away during the production process, affecting product performance consistency.
Design an optical structure including an LED light source and a lens group. The lens group consists of a silicone lens, a first lens with positive optical power, and a second lens. The lens combination satisfies a specific Abbe number, numerical aperture, and radius of curvature relationship. A virtual focal plane and a light-blocking stop are added to achieve high resolution and high uniformity.
It achieves high resolution and high uniformity ADB light pattern, reduces processing costs, improves production consistency and product light efficiency, and has sub-pixel level ADB resolution control.
Smart Images
Figure CN223595706U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of automobile lighting, specifically relates to an optical structure and ADB light type designed by using the structure. BACKGROUND
[0002] With the development of automobile lighting towards the intelligent and pixel direction, the ADB module based on the traditional LED silicone solution has become a widely used high cost-effective ADB module solution because of its high heat resistance, low cost and use of traditional LED.
[0003] But the traditional ADB module based on the silicone solution has the following problems:
[0004] (1) Because the traditional LED is used, the size of the LED is large, which makes it difficult to improve the resolution of ADB;
[0005] (2) Limited by the processing of the silicone teeth in the silicone lens, a gap needs to be reserved between the adjacent silicone teeth, which makes it necessary to use lens patterns and other structures to homogenize the ADB light type, and the lens patterns will cause the following problems: the transition structure between the patterns will cause stray light and reduce the light efficiency; the patterns on the surface of the glass lens will be quickly consumed in the production process, which makes it difficult to ensure the consistency of product performance, so the use of pattern-free or light-pattern optical solution has become an important research direction. UTILITY MODEL CONTENTS
[0006] The utility model aims at solving the defects and deficiencies in the prior art, and designs a high-resolution, high-uniformity and pattern-free optical structure and ADB light type designed by using the structure.
[0007] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of: an optical structure, comprising an LED light source and a lens group arranged on one side of the LED light source, the lens group comprising a silicone lens, a second lens with positive focal length and a first lens with positive focal length arranged in sequence from near to far along the light emitting direction of the LED light source, a virtual focal plane being arranged between the silicone lens and the second lens, and the silicone lens having a plurality of silicone teeth on the side close to the LED light source.
[0008] Preferably, the Abbe number of the first lens is Vd1, the Abbe number of the second lens is Vd2, and the following relationship is satisfied: Vd1>50, Vd2>50.
[0009] Preferably, the numerical aperture NA of the combination of the first lens and the second lens satisfies the condition: 1.6≥NA≥0.7.
[0010] Preferably, at least one light-shield diaphragm is further included, which is located between the first lens and the second lens, or between the second lens and the silica gel lens.
[0011] Preferably, the first surface curvature radius of the first lens is R11, the second surface curvature radius of the first lens is R12, the first surface curvature radius of the second lens is R21, and the second surface curvature radius of the second lens is R22, and the parameters satisfy the following relationship: |R11 / R12|<2.5, |R21 / R22|<2.
[0012] Preferably, the focal length of the combination of the first lens and the second lens is F, and the size of the LED light source in the horizontal direction is X, and the following relationship is satisfied: |F / X|>30.
[0013] Preferably, when the absolute value of the axial distance from the virtual focal plane to the light-out surface of the silica gel lens is greater than 0.2mm, the axial distance from the virtual focal plane to the light-in surface of the silica gel lens is L1, which needs to satisfy L1>1mm; when the absolute value of the axial distance from the virtual focal plane to the light-out surface of the silica gel lens is less than 0.2mm, the axial distance between the light-out surface of the silica gel lens and the light-in surface of the silica gel lens is L2, which needs to satisfy L2>1mm, and satisfy: 0.1<|R21 / F2|<2, wherein R21 is the first surface curvature radius of the second lens, and F2 is the focal length of the second lens.
[0014] An ADB light pattern designed by using the optical structure has the following advantages:
[0015] After the technical scheme is used, the optical structure and the ADB light pattern designed by using the structure have the following advantages:
[0016] The optical structure can realize high uniformity without relying on optical uniformity patterns, and the structure reduces the processing cost, improves the production consistency and product light efficiency, and has high commercial application value. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 FIG. 1 is a structural schematic view of the optical structure of the present application;
[0018] Figures 2-5 FIG. 4 is a schematic view of an ADB light pattern designed by using the optical structure of the present application.
[0019] Wherein: the first lens 1, the first surface 11 of the first lens, the second surface 12 of the first lens, the second lens 2, the first surface 21 of the second lens, the second surface 22 of the second lens, the silica gel lens 3, the light-out surface 31 of the silica gel lens, the light-in surface 32 of the silica gel lens, the virtual focal plane 4, the silica gel tooth 5, the LED light source 6. DETAILED DESCRIPTION
[0020] The utility model will be further clearly and completely described in connection with the drawings and specific embodiments. Obviously, the described embodiments are only some of the embodiments of the utility model, but not all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative, but not as any limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.
[0021] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.
[0022] Unless otherwise specified, the relative arrangement of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that the size of each part shown in the drawings is not drawn in proportion to the actual proportion. The technology, method and equipment known to those skilled in the art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as part of the authorized description. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.
[0023] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" 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 utility model and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.
[0024] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0025] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.
[0026] This utility model discloses an optical structure, such as Figure 1 As shown, the device includes a projection unit and a focusing unit. The projection unit includes a first lens 1 with positive optical power and a second lens 2 with positive optical power. The first lens 1 and the second lens 2 have rotationally symmetric or rotationally asymmetric structures. Preferably, the two lenses have different focal lengths in the horizontal and vertical directions. The focusing unit includes a silicone lens 3, silicone teeth 5, and an LED light source 6. The silicone teeth 5 and the LED light source 6 have a one-to-one correspondence. The projection unit and the focusing unit are coupled through a virtual image plane 4 to achieve optimal performance.
[0027] Further, in order to obtain the required uniform light pattern, the optical structure needs to satisfy the following conditions: the material of each lens can be optical glass or optical plastic, wherein the Abbe number of the first lens 1 is Vd1, the Abbe number of the second lens 2 is Vd2, and the following relationship is satisfied: Vd1>50, Vd2>50; the numerical aperture NA of the combination of the first lens 1 and the second lens 2 satisfies the condition: 1.6≥NA≥0.7; at least one light-blocking diaphragm is included, which is located between the first lens 1 and the second lens 2, or between the second lens 2 and the silica gel lens 3; the curvature radius of the first surface 11 of the first lens 1 is R11, the curvature radius of the second surface 12 of the first lens 1 is R12, the curvature radius of the first surface 21 of the second lens 2 is R21, and the curvature radius of the second surface 22 of the second lens 2 is R22, and the parameters satisfy the following relationship: |R11 / R12|<2.5, |R21 / R22|<2; the focal length of the combination of the first lens 1 and the second lens 2 is F, the size of the LED light source 6 in the horizontal direction is X, and the following relationship is satisfied: |F / X|>30; when the absolute value of the axial distance from the virtual focal plane 4 to the silica gel lens light-out surface 31 is greater than 0.2mm, the axial distance from the virtual focal plane 4 to the silica gel lens light-in surface 32 is L1, which needs to satisfy L1>1mm; when the absolute value of the axial distance from the virtual focal plane 4 to the silica gel lens light-out surface 31 is less than 0.2mm, the axial distance between the silica gel lens light-out surface 31 and the silica gel lens light-in surface 32 is L2, which needs to satisfy L2>1mm, and satisfy: 0.1<|R21 / F2|<2, wherein R21 is the curvature radius of the first surface 21 of the second lens 2, and F2 is the focal length of the second lens 2.
[0028] An ADB light pattern designed with the above optical structure, the uniformity of which satisfies: the light pattern overlap rate of adjacent LED light sources 6 is greater than 50%, and the resolution is less than half of the angle of the light pattern of a single LED light source 6. Specifically, as shown in Figure 2 , after the adjacent LED light sources 6 are turned on, the light pattern overlap area on the screen is greater than 50%, and the light pattern presents a uniform energy distribution.
[0029] The light pattern resolution can reach 0.5 single-pixel width. When 2 LED light sources are turned off, the light pattern dark area width is 0.5 pixel width (as shown in Figure 3 ); when 3 LED light sources are turned off, the light pattern dark area width is 1 pixel width (as shown in Figure 4 ); when 4 LED light sources are turned off, the light pattern dark area width is 1.5 pixel width (as shown in Figure 5 ); and so on. The continuous light pattern control with a minimum width of 0.5 pixel width can be realized, thereby realizing sub-pixel level ADB precision control.
[0030] It should be noted that the high-uniformity high-resolution light type is not limited to single-row pixel arrangement, and a multi-row and multi-column array type ADB light type arrangement can be realized.
[0031] In conclusion, the optical structure and the ADB light type designed by using the structure can simultaneously meet the requirements of high uniformity and high resolution, realize sub-pixel level ADB resolution, the optical structure can realize high uniformity light type independent of optical uniformity patterns, the structure reduces processing cost, improves production consistency and product light efficiency, and has high commercial application value.
[0032] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art in the technical range disclosed by the utility model, according to the technical scheme and the utility model concept of the utility model, equivalent replacement or change, should be covered in the protection scope of the utility model.
Claims
1. An optical structure, characterized by: The application relates to a lens group for LED light source, which comprises an LED light source (6) and a lens group arranged on one side of the LED light source (6), wherein the lens group comprises, from near to far along the light emitting direction of the LED light source (6), a silica gel lens (3), a second lens (2) with positive focal length and a first lens (1) with positive focal length; a virtual focal surface (4) is arranged between the silica gel lens (3) and the second lens (2); and the silica gel lens (3) is provided with a plurality of silica gel teeth (5) on the side close to the LED light source (6).
2. An optical structure according to claim 1, wherein: The Abbe number of the first lens (1) is Vd1, and the Abbe number of the second lens (2) is Vd2, and the following relationship is met: Vd1>50, Vd2>50.
3. An optical structure according to claim 1, wherein: The numerical aperture NA of the combination of the first lens (1) and the second lens (2) meets the condition: 1.6>=NA>=0.
7.
4. An optical structure according to claim 1, wherein: At least one light shielding diaphragm is further arranged between the first lens (1) and the second lens (2) or between the second lens (2) and the silica gel lens (3).
5. An optical structure according to claim 1, wherein: The curvature radius of the first surface (11) of the first lens is R11, the curvature radius of the second surface (12) of the first lens is R12, the curvature radius of the first surface (21) of the second lens is R21, the curvature radius of the second surface (22) of the second lens is R22, and the following relationship is met: |R11 / R12|<2.5, |R21 / R22|<2.
6. An optical structure according to claim 1, wherein: The focal length of the combination of the first lens (1) and the second lens (2) is F, and the size of the light emitting surface of the LED light source (6) in the horizontal direction is X, and the following relationship is met: |F / X|>30.
7. An optical structure according to claim 1, wherein: When the absolute value of the axial distance between the virtual focal surface (4) and the light emitting surface (31) of the silica gel lens is greater than 0.2mm, the axial distance between the virtual focal surface (4) and the light incident surface (32) of the silica gel lens is L1, and L1>1mm is needed to be met; when the absolute value of the axial distance between the virtual focal surface (4) and the light emitting surface (31) of the silica gel lens is less than 0.2mm, the axial distance between the light emitting surface (31) and the light incident surface (32) of the silica gel lens is L2, and L2>1mm is needed to be met, and the following relationship is met: 0.1<|R21 / F2|<2, wherein R21 is the curvature radius of the first surface (21) of the second lens, and F2 is the focal length of the second lens (2).
8. An ADB light pattern designed with the optical structure of any one of claims 1-7. The ADB light type uniformity meets the following conditions: the light type overlapping rate of adjacent LED light sources (6) is greater than 50%, and the resolution is less than half of the light type angle expansion of a single LED light source (6).