Optical system for double light homogenous light output
By using a dual-light uniform light output system, which utilizes a raised curved surface and a dual-focal-point design to achieve uniform light output, the problem of uneven light energy distribution in vehicle lights is solved, realizing uniform light brightness and efficient light coupling, and adapting to different lighting scenarios.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU XINGYU AUTOMOTIVE LIGHTING SYST CO LTD
- Filing Date
- 2025-07-11
- Publication Date
- 2026-06-26
AI Technical Summary
In traditional car lights, there is a large difference in light intensity between the center and the edge of the light source, resulting in uneven distribution of light energy and uneven brightness.
An optical system employing dual-beam uniform light emission includes a light source and a uniform light emission structure. By setting multiple uniform light emission structures that correspond one-to-one with the light source, and utilizing a convex curved surface design and a dual-focal incident surface, the distribution of light energy is optimized, enabling the light to form uniform brightness on the light emission surface.
It achieves uniform light energy distribution, avoids uneven brightness, improves optical coupling efficiency, reduces power consumption and heat, and adapts to the needs of different lighting scenarios.
Smart Images
Figure CN224414960U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive lighting equipment technology, and in particular to an optical system for uniform dual-beam light output. Background Technology
[0002] Because of the significant difference in light intensity between the center and edge of the light source, traditional collimation structures struggle to achieve energy compensation through a single optical surface, resulting in uneven energy distribution of light during transmission. This imbalance may manifest as excessively high brightness at the center of the light spot and excessively low brightness at the edges, or other forms of brightness unevenness. Utility Model Content
[0003] The technical problem to be solved by this utility model is: in order to solve the problem of uneven lighting caused by uneven distribution of light energy in vehicle lights, this utility model provides a dual-beam uniform light output optical system, which is equipped with a uniform light output structure that can improve the uniformity of energy distribution, so as to achieve a uniform lighting effect.
[0004] The technical solution adopted by this utility model to solve its technical problem is: a dual-light uniform light emission optical system, including a light source and a uniform light emission structure. The light source is provided with two light emission points, and the uniform light emission structure is arranged in the light emission direction of the light source. Multiple uniform light emission structures are provided, and each uniform light emission structure corresponds to a light source.
[0005] The uniform light-emitting structure includes a light-emitting surface, which is a convex curved surface along the light-emitting direction and has rotational symmetry. Therefore, if the maximum chord length of the convex light-emitting surface is divided into multiple equal division points, the lines connecting the projection points of these points onto the light-emitting surface and the light source point divide the uniform light-emitting structure into multiple three-dimensional regions on a horizontal plane. The volume of each three-dimensional region expands from the center to both sides, and the illuminated area of each region is equal. Since the light source emits light in a fan shape, the light intensity in the center is higher than that at the edges. Therefore, the photon energy passing through the uniform light-emitting structure gradually decreases from the center to both sides, and the number of photons passing through the uniform light-emitting structure gradually increases from the center to both sides. This causes the luminance corresponding to the illuminated area to approach the center from both sides, thereby achieving uniform light emission by improving the uniformity of energy distribution. Furthermore, the convex light-emitting surface increases the light-emitting area while maintaining the same distance between the two ends, solving the problems of obvious bright line defects and low optical coupling efficiency caused by a small light-emitting area.
[0006] Furthermore, to address the issue that ordinary collimating lenses cannot ensure that all light sources are at the focal point for dual-core LEDs, thus failing to achieve good light uniformity, the uniform light emission structure includes an incident surface. This incident surface, in a vertical plane, comprises a first structural surface and a second structural surface. The first structural surface has a first focal point F1, and it collimates only the light rays emitted from the first focal point F1. The second structural surface has a second focal point F2, and it collimates only the light rays emitted from the second focal point F2. The first focal point F1 and the second focal point F2 are located on the same vertical line. Therefore, the light rays emitted from focal points F1 and F2 are collimated only from the corresponding first and second structural surfaces, and there is no interference between the emitted light rays, ensuring uniformity of light emission. Furthermore, each type of light ray remains in focus, resulting in higher efficiency, effectively saving power and heat, and reducing costs.
[0007] Furthermore, the first and second structural surfaces are curved surfaces that bulge towards the direction of incident light. The curved surfaces are optical curved surfaces with rotational and translational symmetry. The light emission point of the light source corresponds to the first focal point F1 or the second focal point F2. Thus, the light emitted from the first focal point F1 or the second focal point F2 is refracted after passing through the corresponding first or second structural surface and becomes parallel light in the vertical plane.
[0008] Furthermore, the position of the first focus F1 or the position of the second focus F2 on the horizontal plane is achieved by adjusting the curvature of the corresponding first structural surface or the curvature of the second structural surface; the distance between the first focus F1 and the second focus F2 is less than or equal to the sum of the maximum chord length of the first structural surface and the maximum chord length of the second structural surface, and the distance between the first focus F1 and the second focus F2 is greater than or equal to the difference between the maximum chord length of the first structural surface and the maximum chord length of the second structural surface.
[0009] Furthermore, the first structural surface and the second structural surface are cut and spliced together, so that the first structural surface can form a first structural part and a third structural part, and the second structural surface can form a second structural part and a fourth structural part; the first structural part and the second structural part intersect to form a first included angle α, and the third structural part and the fourth structural part intersect to form a second included angle b, wherein the first included angle α is smaller than the second included angle b; thereby, the first structural part and the second structural part form a first combined light emission form, and the third structural part and the fourth structural part form a second combined light emission form.
[0010] Furthermore, the light-emitting surface has a virtual focal point F3, which is located on the side of the light-incident surface away from the light-emitting surface. Thus, when the virtual focal point F3 is on the same vertical line as the first focal point F1 or the second focal point F2, the light emitted from the first focal point F1 or the second focal point F2 is refracted on the vertical surface of the light-incident surface and then refracted again on the light-emitting surface to become parallel light, with the outermost light rays refracted from the end of the light-emitting surface to become parallel light.
[0011] Furthermore, the curvature of the light-emitting surface is adjusted according to actual needs, thereby adjusting the position of the virtual focal point F3.
[0012] Furthermore, the uniform light-emitting structure is provided with a thick-walled member in the light-emitting direction that can completely emit the light rays of the uniform light-emitting structure. The thick-walled member includes a second light-incident surface and a second light-emitting surface, and the surfaces of the second light-incident surface and / or the second light-emitting surface are provided with light distribution patterns; thereby improving the uniformity of the light.
[0013] Furthermore, multiple uniform light-emitting structures are evenly arranged along the long side of the thick-walled component, and the angle between the vertical plane containing the central axis of a single uniform light-emitting structure and the light-incident surface of the thick-walled component is less than or equal to a right angle; thus, the number, distance, and placement direction of the uniform light-emitting structure can be adjusted according to the required number of LEDs and the placement method; for example, tilting the structure can adapt to most tilted thick-walled components.
[0014] Furthermore, multiple uniform light-emitting structures are stacked vertically.
[0015] The beneficial effects of this invention are that the dual-beam uniform light output optical system comprises a light source, a uniform light output structure, and a thick-walled component. Its core objective is to achieve highly uniform light output through a dual-focus optical design and curved surface control. The light source employs a dual-emission point design, corresponding one-to-one with the uniform light output structure to form independent optical path channels. The thick-walled component, as a secondary optical element, further optimizes the light distribution and achieves multi-stage beam shaping.
[0016] This invention relates to a dual-beam uniform light-emitting optical system. The light-emitting surface, a convex curved surface, is used to divide the three-dimensional region using the maximum chord length equal division method. The fan-shaped emission characteristic of the light source results in high light intensity at the center and low light intensity at the edges. The asymmetrical curvature design of the curved surface causes photon energy to decrease from the center to both sides, while the number of photons increases in the opposite direction, ultimately achieving uniform luminance on the illuminated surface. This design is similar to the uniform light-emitting logic of a dual microlens array, but simplifies the structure through a single curved surface, while avoiding the bright line defects caused by traditional small light-emitting surfaces.
[0017] This invention relates to a dual-beam uniform light emission optical system. The uniform light emission structure features a dual-focal incident surface, composed of a first structural surface (focal point F1) and a second structural surface (focal point F2). The two focal points are collinear, and the light rays do not interfere with each other. The asymmetry of the curved surfaces causes the light rays to refract and form vertically parallel light. Light rays emitted from focal points F1 and F2 will only exit through the corresponding first and second structural surfaces, thus ensuring the uniformity of the light emission effect. Attached Figure Description
[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0019] Figure 1 This is a three-dimensional schematic diagram of the uniform light emission structure in this utility model.
[0020] Figure 2 yes Figure 1 A top view of the uniform light-emitting structure.
[0021] Figure 3 yes Figure 1 A frontal view of a uniform light-emitting structure.
[0022] Figure 4 yes Figure 1 A schematic cross-sectional view of section A of the uniform light-emitting structure.
[0023] Figure 5 yes Figure 4 A schematic diagram of the first and second structural planes.
[0024] Figure 6 This is a three-dimensional schematic diagram of the optical system with uniform light output from two beams in Example 1.
[0025] Figure 7 This is a three-dimensional schematic diagram of the optical system with uniform light output in Embodiment 2.
[0026] Figure 8 This is a three-dimensional schematic diagram of the optical system with uniform light output in Embodiment 3.
[0027] In the figure: 1. Uniform light-emitting structure; 11. Light-incident surface one; 111. First structural part; 112. Second structural part; 113. Third structural part; 114. Fourth structural part; 12. Light-emitting surface one; 2. Thick-walled part; 21. Light-incident surface two; 22. Light-emitting surface two. Detailed Implementation
[0028] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.
[0029] like Figures 1-5 As shown, the optical system with dual-light uniform emission includes a light source and a uniform emission structure 1. The light source has two light-emitting points. The uniform emission structure 1 is set in the light emission direction of the light source. There are multiple uniform emission structures 1. Each uniform emission structure 1 corresponds to a light source. A thick-walled member 2 is provided in the light emission direction of the uniform emission structure 1, which can completely emit the light from the uniform emission structure 1. The thick-walled member 2 includes a light-incident surface 21 and a light-emitting surface 22.
[0030] Reference Figure 1 , Figure 2 The uniform light-emitting structure 1 includes a light-emitting surface 12, which is a convex curved surface along the light-emitting direction and has rotational symmetry. Therefore, if the maximum chord length of the convex light-emitting surface 12 along the light-emitting direction is evenly divided into multiple equal division points, the lines connecting the projection points of these equal division points onto the light-emitting surface 12 and the light source point will divide the uniform light-emitting structure 1 into multiple three-dimensional regions on the horizontal plane (see reference). Figure 2 The volume of the three-dimensional region expands from the center to both sides, and the corresponding illuminated area of each region is equal. Since the light source emits light in a fan shape, the light intensity in the center is higher than that at the edges. Therefore, the photon energy passing through the uniform light-emitting structure 1 gradually decreases from the center to both sides, and the number of photons passing through the uniform light-emitting structure 1 gradually increases from the center to both sides. This makes the luminance corresponding to the illuminated area approach the center from both sides. In addition, the convex light-emitting surface 12 increases the light-emitting area while keeping the distance between the two ends unchanged, which solves the problems of obvious bright line defects and low light coupling efficiency caused by the small light-emitting area.
[0031] Reference Figure 3 , Figure 4 The uniform light-emitting structure 1 includes an incident surface 11. The incident surface 11 includes a first structural surface and a second structural surface on a vertical plane. The first structural surface has a first focal point F1, and the first structural surface collimates only the light rays emitted from the first focal point F1. The second structural surface has a second focal point F2, and the second structural surface collimates only the light rays emitted from the second focal point F2. The first focal point F1 and the second focal point F2 are located on the same vertical line. Therefore, the light rays emitted from the focal points F1 and F2 will only be emitted from the corresponding first and second structural surfaces, and the emitted light rays will not interfere with each other, thereby ensuring the uniformity of the light emission effect.
[0032] in:
[0033] Reference Figure 4 , Figure 5The first and second structural surfaces are curved surfaces that bulge towards the incident light direction. The curved surfaces are optical surfaces with rotational and translational symmetry (the incident surface -11 is formed by rotating the first and second structural surfaces around the vertical line where the first focus F1 and the second focus F2 are located). The light emission point of the light source corresponds to the first focus F1 or the second focus F2. Thus, the light emitted from the first focus F1 or the second focus F2 is refracted after passing through the corresponding first or second structural surface and is in a parallel light state in the vertical plane.
[0034] Reference Figure 4 The position of the first focus F1 or the position of the second focus F2 on the horizontal plane is achieved by adjusting the curvature of the corresponding first structural surface or the curvature of the second structural surface; the distance between the first focus F1 and the second focus F2 is less than or equal to the sum of the maximum chord length of the first structural surface and the maximum chord length of the second structural surface, and the distance between the first focus F1 and the second focus F2 is greater than or equal to the difference between the maximum chord length of the first structural surface and the maximum chord length of the second structural surface.
[0035] Reference Figure 4 The first and second structural surfaces are cut and spliced together, so that the first structural surface can form a first structural part 111 and a third structural part 113, and the second structural surface can form a second structural part 112 and a fourth structural part 114. The first structural part 111 and the second structural part 112 intersect to form a first included angle α, and the third structural part 113 and the fourth structural part 114 intersect to form a second included angle β, where the first included angle α is smaller than the second included angle β. Thus, the first structural part 111 and the second structural part 112 form a first combined light emission form for narrow-range high-density light emission; the third structural part 113 and the fourth structural part 114 form a second combined light emission form for wide-range diffusion. This design can adapt to different lighting scene requirements.
[0036] Reference Figure 2 The light-emitting surface 12 has a virtual focal point F3, which is located on the side of the light-incident surface 11 away from the light-emitting surface 12. Therefore, by adjusting the curvature of the light-emitting surface 12, the position of the virtual focal point F3 is changed, so that the light rays form a controllable refraction path within the thick-walled component 2. When the virtual focal point is coaxial with F1 / F2, the edge rays can be accurately collimated, adapting to the needs of switching between high beam and low beam.
[0037] Example 1: To adapt to standard designs, the following additions are made to the above structure:
[0038] Reference Figure 6 The light-incident surface 21 is provided with a light distribution pattern; multiple uniform light-emitting structures 1 are evenly arranged along the long side of the thick-walled member 2, and the angle between the vertical plane containing the central axis of a single uniform light-emitting structure 1 and the light-incident surface 21 of the thick-walled member 2 is equal to a right angle.
[0039] Example 2: To accommodate tilted shapes, the difference from Example 1 is as follows:
[0040] Reference Figure 7 The surface of the light-emitting surface 22 is provided with a light distribution pattern; multiple uniform light-emitting structures 1 are evenly arranged along the long side of the thick-walled component 2, and the angle between the vertical plane containing the central axis of a single uniform light-emitting structure 1 and the light-incident surface 21 of the thick-walled component 2 is less than a right angle; thus, the uniform light-emitting structure 1 can adjust the number, distance and placement direction of the structure according to the required number of LEDs and the placement method; and thus adapt to most tilted thick-walled components 2 by tilting the placement.
[0041] Example 3: To suit compact spaces, unlike Example 1, only uniform light emission structure 1 is used, specifically:
[0042] Reference Figure 8 Multiple uniform light-emitting structures 1 are stacked vertically.
[0043] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.
Claims
1. An optical system with dual-beam uniform light emission, comprising a light source and a uniform light emission structure (1), wherein the light source has two light-emitting points, the uniform light emission structure (1) is disposed in the light emission direction of the light source, at least one uniform light emission structure (1) is disposed, and the uniform light emission structure (1) corresponds one-to-one with the light source; characterized in that: The uniform light-emitting structure (1) includes a light-emitting surface (12), which is a curved surface that protrudes along the light-emitting direction; the light-emitting surface (12) has a virtual focal point F3, which is located on the side of the light-incident surface (11) away from the light-emitting surface (12). The position of the virtual focal point F3 is obtained by adjusting the curvature of the light-emitting surface (12) according to actual needs. The virtual focus F3 is set on the same vertical line as the light-emitting point by adjusting the curvature of the light-emitting surface (12), so that the light rays at the outermost edge are refracted from the end of the light-emitting surface (12) and emitted as parallel light.
2. The dual light uniformity optical system of claim 1, wherein: The uniform light-emitting structure (1) includes an incident surface (11), which includes a first structural surface and a second structural surface on a vertical plane. The first structural surface has a first focal point F1, and the first structural surface collimates only the light emitted from the first focal point F1. The second structural surface has a second focal point F2, and the second structural surface collimates only the light emitted from the second focal point F2. The first focal point F1 and the second focal point F2 are located on the same vertical line.
3. The dual light uniform output optical system of claim 2, wherein: The first and second structural surfaces are curved surfaces that bulge in the direction of incident light. The curved surfaces are optical curved surfaces with rotational and translational symmetry. The light-emitting point of the light source corresponds to the first focal point F1 or the second focal point F2.
4. The dual light uniform output optical system of claim 2, wherein: The distance between the first focus F1 and the second focus F2 is less than or equal to the sum of the maximum chord length of the first structural surface and the maximum chord length of the second structural surface, and the distance between the first focus F1 and the second focus F2 is greater than or equal to the difference between the maximum chord length of the first structural surface and the maximum chord length of the second structural surface.
5. The optical system for uniform light output of two beams as described in claim 3, characterized in that: The first structural surface and the second structural surface are cut and spliced together, so that the first structural surface can form a first structural part (111) and a third structural part (113), and the second structural surface can form a second structural part (112) and a fourth structural part (114); the first structural part (111) and the second structural part (112) intersect to form a first included angle a, and the third structural part (113) and the fourth structural part (114) intersect to form a second included angle b, and the first included angle a is smaller than the second included angle b.
6. The optical system for uniform light output of two beams as described in claim 1, characterized in that: The uniform light-emitting structure (1) has a thick-walled member (2) in the light-emitting direction to allow the light to be emitted completely. The thick-walled member (2) includes a light-incident surface (21) and a light-emitting surface (22). The surfaces of the light-incident surface (21) and / or the light-emitting surface (22) are provided with light distribution patterns.
7. The optical system for uniform light output of two beams as described in claim 6, characterized in that: Multiple uniform light-emitting structures (1) are uniformly arranged along the long side of the thick-walled member (2), and the angle between the vertical plane containing the central axis of a single uniform light-emitting structure (1) and the light-incident surface (21) of the thick-walled member (2) is less than or equal to a right angle.
8. The optical system for uniform light output of two beams as described in claim 1, characterized in that: Multiple uniform light-emitting structures (1) are stacked in the vertical direction.