Optical structure and vehicle lamp
By setting transparent optics on the side wall of the headlight reflector, some light rays propagate and reflect them, the problems of insufficient light energy and uneven lighting caused by existing headlight reflectors are solved, and more uniform lighting is achieved Effects and higher optical energy.
Patent Information
- Application Number
- CN202411903386.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-02-14
AI Technical Summary
Due to the existence of side walls, some light rays are blocked or absorbed, resulting in insufficient light energy in large-angle areas inside and outside the lighting area, destroying the uniformity of lighting.
A transparent optical member is provided on the side wall of the reflector, through its inlet and outlet ends, part of the light ray is propagated in the transparent optical member, and reflected through the outward and bottom surfaces to increase the energy distribution of the light ray in the central area.
Through the design of transparent optics, more light can be concentrated in the lighting area, improving optical energy and intensity, optimizing energy distribution, reducing the risk of super brightness, and achieving a uniform lighting effect at all angles without dead angles.
Smart Images
Figure CN119436024A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a technical vehicle lighting system, in particular to an optical structure and a vehicle lamp. Background Art
[0002] A reflector is an optical device used to reflect light. Its inner surface is usually a specially designed curved surface, which can be a parabolic surface or an elliptical surface. The main function of a reflector is to reflect, converge or diverge the light emitted by the light source to meet specific lighting or optical imaging requirements. Reflectors are widely used in the optical design of automotive lights because of their high optical efficiency and simple manufacturing and assembly processes.
[0003] However, part of the light emitted from the light source should propagate outward at a large angle and illuminate the corresponding area. However, due to the presence of the larger side wall of the reflector, this part of the light is blocked or absorbed by the side wall of the reflector, so that the light energy in the large angle area outside the illumination area is insufficient, which destroys the uniformity of the illumination.
[0004] Since the overall shape of the reflector is an arc surface with a large inclination angle, part of the light reflected by the reflector will propagate toward the non-central area (the area away from the central axis of the reflector and close to the edge of the reflector), and the light cannot be well concentrated in the central area. At the same time, the inner lampshade is made of scattering material. When the light passes through the inner lampshade made of this scattering material, the originally relatively orderly light will be disrupted and dispersed in all directions. This causes the energy distribution of the light to change, and part of the light energy diffuses to the surrounding areas, causing the overall energy to move outward. When the reflector functions as a position light, since the central area cannot obtain enough light energy convergence, in order to achieve the specified position light lighting effect, it is often necessary to increase the power or intensity of the light source, which easily leads to the risk of over-brightness.
[0005] In summary, due to the limitations of the side walls and the reflector structure, some light cannot be transmitted to the lighting area, the central area has insufficient energy, there are dark areas in the outer large-angle area, and the reflector has the defect of uneven energy distribution after lighting. Summary of the invention
[0006] The object of the present invention is to provide an optical structure and a vehicle lamp, which can improve the uniformity of energy distribution.
[0007] One aspect of the present invention provides an optical structure, comprising a reflector body, a side wall and a transparent optical member; wherein the transparent optical member comprises a light emitting surface, and a light input end and a light output end arranged opposite to each other, and the light output surface is located between the light input end and the light output end; the transparent optical member is arranged on the side wall of the reflector; the reflector body has a light input end located at one end thereof and a light output end located at the other end thereof; a light source is arranged opposite to the light input end of the reflector body; the light input end of the transparent optical member and the light output end of the reflector body are arranged adjacent to or connected to each other; light emitted by the light source is reflected by the reflector body, and at least part of the light enters the transparent optical member from the light input end thereof, and at least part of the light entering the transparent optical member can be emitted from the light output end of the transparent optical member; at least part of the light entering the transparent optical member can be emitted from the light output surface of the transparent optical member.
[0008] In one embodiment, a plurality of rows of optical pattern structures are disposed on the surface of the reflector body, and the optical pattern structures are used to reflect light emitted from the light source.
[0009] In one embodiment, a plurality of rows of the optical pattern structures are arranged in sequence to form the reflector body in a stepped shape with intervals, and the light emitting end of the reflector body is also in a stepped shape with intervals.
[0010] In one embodiment, the light incident end of the transparent optical element is also in the shape of steps arranged at intervals; the light incident end of the transparent optical element is adapted to the optical pattern structure of the light emitting end of the reflector body.
[0011] In one embodiment, the thickness of the transparent optical element is 2 mm to 4 mm.
[0012] In one embodiment, the transparent optical component also includes a bottom surface arranged opposite to the light emitting surface; the bottom surface of the transparent optical component is opposite to the side wall of the reflective component and is in contact with the side wall of the reflective component, so that at least part of the light entering the transparent optical component can be reflected by the bottom surface and emitted from the light emitting surface of the transparent optical component.
[0013] In one embodiment, the bottom surface of the transparent optical component is provided with an optical texture layer.
[0014] In one embodiment, the bottom surface of the transparent optical element is provided with an aluminum coating.
[0015] In one embodiment, the light emitting end of the transparent optical element is arranged obliquely relative to the bottom surface.
[0016] Another aspect of the present invention provides a vehicle lamp, comprising a light source and an optical structure, wherein the optical structure is the optical structure described in any of the above embodiments; the light source is used to emit light to the optical structure.
[0017] The optical structure of the present invention is provided with a transparent optical component so that the light is reflected by the reflective bowl body and then propagated in the transparent optical component. Part of the light can propagate in the transparent optical component in a forward direction and be emitted from the light emitting end of the transparent optical component. The light emitted from the light emitting end can propagate to the central area; part of the light can be reflected and emitted from the light emitting surface. On the basis of maintaining the optical efficiency of the reflective component, the transparent optical component is used to change the propagation path of part of the light, so that more light can be gathered in the lighting area, thereby increasing the energy of the regulatory area, improving the optical energy and intensity, optimizing the energy distribution, and reducing the risk of over-brightness. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:
[0019] Figure 1 is a front view of the reflector before improvement;
[0020] Figure 2 is a side view of the reflector before improvement;
[0021] Figure 3 is a schematic diagram of a three-dimensional structure according to an embodiment of an optical structure of the present invention;
[0022] Figure 4 yes Figure 3 A front view of the optical structure shown;
[0023] Figure 5 yes Figure 3 A side view of the optical structure shown;
[0024] Figure 6 It is a detailed enlarged view of the junction between the reflector body and the transparent optical component;
[0025] Figure 7 is a light schematic diagram of the reflector before improvement;
[0026] Figure 8 yes Figure 3 A light schematic diagram of the optical structure of the present invention is shown;
[0027] Fig. 9 This is the optical lighting energy distribution diagram of the reflector before improvement;
[0028] Fig.10 yes Figure 3 The optical lighting energy distribution diagram of the optical structure of the present invention is shown. DETAILED DESCRIPTION
[0029] Figure 1 and Figure 2 FIG. 2 shows the structure of the reflector 1 before improvement. Figure 1 and Figure 2 As shown, the reflector 1 before improvement includes a reflector body 13 and a reflector side wall 12 located on the side of the reflector body 13. In practice, the reflector body 13 and the reflector side wall 12 can be formed in one piece; the reflector body 13 and the reflector side wall 12 can also be separately provided, and the reflector side wall 12 is fixed to the side of the reflector body 13 by a fixing member. Among them, the reflector side wall 12 is connected to the reflector body 13. The reflector side wall 12 is used to separate adjacent reflectors to avoid cross-talk. Figure 1 and Figure 2 As shown, the side wall 12 of the reflector is generally larger in area.
[0030] On the one hand, part of the light emitted from the light source 2 should be directed outward at a large angle ( Figure 1 In the front view shown, the light is transmitted in a range of about 60° on both sides of the central axis of the body 13 and illuminates the corresponding area. However, due to the presence of the larger area of the reflector side wall 12, this part of the light is blocked or absorbed by the reflector side wall 12, so that the light energy in the outer large angle area is insufficient, which destroys the uniformity of the illumination.
[0031] On the other hand, the reflector 1 before the improvement has a relatively inclined shape and uses an inner lampshade made of a scattering material, which causes the overall energy to move outward and the center energy to be insufficient. When the reflector is used as a position lamp, there is often a risk of over-brightness.
[0032] In summary, the reflector 1 before improvement has insufficient energy in the central area and at a large angle outside after lighting, and has the defects of poor lighting uniformity and uneven energy distribution.
[0033] However, in recent years, in addition to meeting basic regulatory requirements, reflectors with higher lighting uniformity characteristics have become a focus of attention.
[0034] Reference will now be made in detail to embodiments of the present invention, one or more examples of which are illustrated in the accompanying drawings. Each example is provided to explain the present invention, not to limit the present invention. In fact, it will be apparent to those skilled in the art that various modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature illustrated or described as part of one embodiment may be used together with another embodiment to produce yet another embodiment. Therefore, the present invention is intended to cover these modifications and variations within the scope of the appended claims and their equivalents.
[0035] Figure 3The optical structure 10, light source 2 and inner lampshade 20 of the vehicle lamp of the present invention are shown. The light source 2 is used to emit light to the optical structure 10, and the optical structure 10 reflects and redirects the light emitted by the light source 2. The inner lampshade 20 can further adjust the light reflected by the optical structure 10. It should be noted that the number of light sources 2 is not limited to Figure 3 Quantity shown.
[0036] The optical structure 10 includes a reflector, which further includes a reflector body 100 and a reflector side wall 12. The reflector side wall 12 is located on the side of the reflector body 100. The reflector body 100 has a light input end 101 located at one end thereof and a light output end 102 located at the other end thereof. The light source 2 and the light input end 101 of the reflector body 100 are arranged opposite to each other.
[0037] like Figures 3 to 5 As shown, the optical structure 10 of the present invention further includes a transparent optical component 200 . Figure 4 is a front projection diagram of the optical structure 10, Figure 5 for Figure 4 The side projection after rotating 90 degrees. The reflector side wall 12 is used to separate adjacent reflector bodies 100, and acts as a separation boundary to prevent cross-light. The surface of the reflector body 100 is an arc surface.
[0038] The transparent optical element 200 includes a light-incoming end 210 and a light-emitting end 220 that are oppositely disposed. The transparent optical element 200 is disposed on the reflective element side wall 12 and supported by the reflective element side wall 12 .
[0039] Furthermore, the transparent optical element 200 includes a light emitting surface 230 and a bottom surface 240 opposite to each other, and the bottom surface 240 of the transparent optical element 200 is in contact with the reflector side wall 12. The light emitting surface 230 is located between the light incident end 210 and the light emitting end 220 of the transparent optical element 200.
[0040] The light incident end 210 of the transparent optical member 200 is opposite to the reflector body 100. The light emitted by the light source 2 is reflected by the reflector body 100 and enters the transparent optical member 200 from the light incident end 210 of the transparent optical member 200. At least part of the light entering the transparent optical member 200 can be emitted from the light emitting end 220 of the transparent optical member 200, and the part of the light enters the central area to increase the central energy.
[0041] Compared to Figure 1 and Figure 2The reflector 1 before improvement is shown. The optical structure 10 of the present invention sets a transparent optical component 200, so that the light is reflected by the reflective bowl body and then propagated through the transparent optical component 200, so that the light can propagate along the forward direction of the transparent optical component 200, and then be emitted from the light output end 220 of the transparent optical component 200. Then, on the basis of maintaining the optical efficiency of the reflector, more light can be gathered to the central area, the energy of the regulatory area is increased, the energy and intensity of the optical center area are improved, the energy distribution is optimized, and the risk of super brightness is reduced.
[0042] At least part of the light entering the transparent optical member 200 can be reflected by the bottom surface 240 of the transparent optical member 200 and emitted from the light emitting surface 230 of the transparent optical member 200. In the reflector 1 before the improvement, this part of the light was originally blocked or absorbed by the side wall 12 of the reflector. The transparent optical member 200 of the present invention can improve the utilization rate of this part of the light, so that this part of the light is transmitted to the outer large angle area.
[0043] It should be explained that the transparent optical element 200 of the present invention propagates light according to the total reflection principle. Preferably, the transparent optical element 200 of the present invention has a thickness of 2 mm to 4 mm and is a transparent element. The transparent optical element 200 can be a thin-walled light guide or a thin-thick wall element.
[0044] The reflective component is a reflective bowl or an optical component with a specific reflective function.
[0045] The transparent optical member 200 of the present invention has a relatively small thickness. On the one hand, it can make the light form a stable oscillation mode in the transparent optical member 200 more quickly, and the frequency of the light oscillation in the transparent optical member 200 is higher, so as to better control the propagation direction of the light and optimize the light intensity distribution. On the other hand, if the transparent optical member 200 has a large thickness, it will affect the appearance of the side wall 12 of the reflector. The transparent optical member 200 with a small thickness can reduce the impact on the optical structure 10.
[0046] Combination Figures 3 to 5 The surface of the reflector body 100 is provided with multiple rows of optical pattern structures 110, and the optical pattern structures 110 are used to reflect the light emitted from the light source 2. Specifically, based on the focal position of the light source 2, the optical pattern structure 110 can be arranged in the central area of the reflector body 100, so that the light propagates after passing through the reflector body 100 to meet the regulatory requirements of automobile lamps.
[0047] Continue to refer Figures 3 to 5Furthermore, a plurality of optical pattern structures 110 are arranged in sequence to form a reflector body 100 with intervals and steps on the inner surface of the reflector body 100, and the light-emitting end 102 of the reflector body 100 is also in an interval-set step shape. Compared with the optical pattern structures connected in sequence and in the shape of a parabola, the reflector body 100 of the present invention can better disperse the light energy, reduce the concentration of light intensity and the difference between light and dark, and improve the uniformity of lighting. The interval-set step-shaped reflector body 100 can achieve uniform gradual change of light.
[0048] like Figure 6 The intersection of the reflector body 100 and the transparent optical element 200 is shown as a step-shaped light-incoming end 210 of the transparent optical element 200. The light-incoming end 210 of the transparent optical element 200 is matched with the optical pattern structure 110 of the light-emitting end 102 of the reflector body 100.
[0049] The light incident end 210 of the transparent optical element 200 includes a plurality of light incident surfaces 211. The plurality of light incident surfaces 211 are parallel to each other.
[0050] It should be noted that the structures of the optical pattern structure 110 of the optical structure 10 and the light incident end 210 of the transparent optical element 200 of the present invention are not limited to the following. Figure 6 The step structure shown can be other shapes or step structures with other inclined angles. The light incident surface 211 of the transparent optical element 200 can be adjusted according to the propagation direction of the light in the transparent optical element 200 .
[0051] In the optical structure 10 of the present invention, the light is reflected by the reflector body 100 and then propagates along the forward direction of the transparent optical element 200 through the light incident surface 211, thereby increasing the energy in the central area. Figure 1 and Figure 2 The reflector 1 before improvement is shown, and the light incident end 210 of the transparent optical component 200 intersects with the reflector body 100 to have a matching structure, so that the light is reflected by the reflective bowl body 100 and then propagates forward along the rear edge of the front and rear surfaces of the transparent optical component 200, thereby increasing the energy in the regulatory area and increasing the central energy by 5% or more.
[0052] In one embodiment, an optical texture layer (not shown) may be provided on the bottom surface 240 of the transparent optical component 200 that is attached to the side wall 12 of the reflector. The optical texture layer can enhance the oscillation of light.
[0053] In another embodiment, the bottom surface 240 of the transparent optical member 200 may be provided with an aluminum coating (not shown). The aluminum coating has a high reflectivity. When light propagates in the transparent optical member 200 to the aluminum coating, the degree of light leakage can be reduced, and more light can be retained in the transparent optical member 200, thereby increasing the lighting energy.
[0054] In another embodiment, the bottom surface 240 of the transparent optical element 200 may be provided with an optical texture layer first, and then aluminum plating may be performed. The bottom surface 240 where the transparent optical element 200 and the side wall 12 of the reflector meet has an optical pattern and / or aluminum plating, so that after the light is reflected by the reflector body 100 of the present invention, the optical texture layer of the transparent optical element 200 is further oscillated, and the aluminum plating layer reduces light leakage, so as to further enhance the energy at a large angle. Figure 7 and Figure 8 , Figure 7 and Figure 8 The lines emitted from the light source 2 are schematic diagrams of the propagation path of the light. Figure 7 is a schematic diagram of the light propagation path of the reflector 1 before improvement, Figure 8 FIG. 1 is a schematic diagram of a partial light propagation path of the optical structure 10 of the present invention.
[0055] Figure 8 The light shown in FIG. 1 is a portion of the light that enters the transparent optical member 200 after being reflected by the reflector body 100 and is emitted from the light-emitting end 220 of the transparent optical member 200. The remaining light that does not enter the transparent optical member 200 and the light that enters the transparent optical member 200 but is not emitted from the light-emitting end 220 are shown in FIG. Figure 8 No longer displayed.
[0056] In the present invention, only a small portion of the light reflected by the reflector body 100 enters the transparent optical element 200, accounting for about 1% to 5% of the total light.
[0057] like Figure 7 The schematic diagram of the light of the reflector 1 before improvement is shown. After the light is reflected by the reflector 1 before improvement, part of the light is emitted toward the side wall 12 of the reflector. However, due to the large area of the side wall 12 of the reflector, the uniformity of the energy at a large angle outside after lighting is poor under the shielding of the side wall 12 of the reflector.
[0058] Compared to Figure 7 ,from Figure 8It can be obtained that the light can be reflected by the reflector body 100 and then propagated to the transparent optical member 200. Part of the light is emitted through the light-emitting end 220 of the transparent optical member 200, and part of the light is emitted through the light-emitting surface 230 of the light guide, which changes the propagation path of the light. In this way, the optical structure 10 of the present invention not only improves the energy in the central area, but also has a higher energy output at a large angle, and also solves the large-angle lighting defect of the reflector 1 before the improvement due to the excessive side wall 12, thereby meeting the requirements of uniform lighting effect at all angles without dead angles.
[0059] Fig. 9 and Fig.10 They are Figure 2 and Figure 5 The lighting energy distribution diagram of the side view is shown, where the lighting energy distribution is indicated in green.
[0060] Compared to Fig. 9 The energy distribution diagram of the reflector 1 before improvement is shown in FIG. Fig.10 It can be seen from the energy distribution diagram of the optical structure 10 of the present invention that after the light is reflected by the reflector body 100, it is oscillated by the optical cortex layer of the transparent optical component 200 to further enhance the energy at a large angle by 2-4 times, so that the large angle presents a uniform lighting effect after lighting. It should be noted that the transparent optical component 200 without the optical cortex layer can also play a certain role in enhancing the energy at a large angle.
[0061] In one embodiment, the light emitting end 220 of the transparent optical member 200 is tilted relative to the bottom surface 240. Light can be emitted from the light emitting end 220 and propagated to the central area. In this embodiment, the tilt angle of the light emitting end 220 can be designed in combination with the inner lampshade 20 or the optical structure of other vehicle lamps to meet the lighting requirements, and the present invention is not limited thereto.
[0062] The optical structure 10 of the present invention can further meet higher lighting uniformity requirements on the basis of meeting basic regulatory requirements, such as requiring the brightness difference at the middle angle to be 10% and no obvious dark area at the outer large angle. Higher lighting uniformity can demonstrate the superiority and aesthetics of the OEM's automobile.
[0063] The optical structure 10 of the present invention is based on the functions of front and rear signal lights, combined with the light-guiding function of the transparent optical component 200. On the one hand, it increases the energy of the central regulatory area, thereby reducing the risk of over-brightness; on the other hand, it enables the reflective component side wall 12 to have a higher energy output at a large angle, and also largely solves the large-angle lighting defect of the ordinary reflective component solution caused by the excessive size of the side wall 12, thereby achieving the uniform lighting effect at all angles without dead ends required by the OEM.
[0064] The optical structure 10 of the present invention achieves a relatively good optical uniformity effect after large-angle lighting without reducing the optical efficiency of the reflector 1 before improvement and on the basis of meeting national regulatory requirements. It solves the defect that dark areas will appear on the outer side at large angles after lighting due to the excessively large side wall 12 of the reflector, improves the intensity of the optical center area, and realizes the optical effect of no dark areas at all angles of optical lighting.
[0065] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.
Claims
1. An optical structure, characterized in that: It comprises a reflector and a transparent optical component (200); wherein the reflector comprises a reflector body (100) and a reflector side wall (12) located on the side of the reflector body (100); The transparent optical component (200) comprises a light emitting surface (230), and a light input end (210) and a light output end (220) arranged opposite to each other, wherein the light emitting surface (230) is located between the light input end (210) and the light output end (220); The transparent optical component (200) is arranged on the side wall (12) of the reflective component; The reflector body (100) has a light input end (101) located at one end thereof and a light output end (102) located at the other end thereof; A light source (2) is arranged opposite to the light incident end (101) of the reflector body (100); The light input end (210) of the transparent optical element (200) and the light output end (102) of the reflector body (100) are arranged adjacent to or connected to each other; The light emitted by the light source (2) is reflected by the reflector body (100), and at least part of the light enters the transparent optical component (200) from the light entrance end (210) of the transparent optical component (200), and at least part of the light entering the transparent optical component (200) can be emitted from the light exit end (220) of the transparent optical component (200); at least part of the light entering the transparent optical component (200) can be emitted from the light exit surface (230) of the transparent optical component (200).
2. The optical structure according to claim 1, characterized in that: The surface of the reflector body (100) is provided with a plurality of rows of optical pattern structures (110), and the optical pattern structures (110) are used to reflect light emitted from the light source (2).
3. The optical structure according to claim 2, characterized in that: A plurality of rows of the optical pattern structures (110) are arranged in sequence to form a reflector body (100) in the shape of steps arranged at intervals, and the light emitting end (102) of the reflector body (100) is also in the shape of steps arranged at intervals.
4. The optical structure according to claim 2, characterized in that: The light incident end (210) of the transparent optical element (200) is in the shape of steps arranged at intervals; The light input end (210) of the transparent optical element (200) and the optical pattern structure (110) of the light output end (102) of the reflector body (100) are matched.
5. The optical structure according to claim 1, characterized in that: The transparent optical component (200) has a thickness of 2 mm to 4 mm.
6. The optical structure according to any one of claims 1 to 5, characterized in that: The transparent optical component (200) further comprises a bottom surface (240) arranged opposite to the light emitting surface (230); The bottom surface (240) of the transparent optical component (200) is opposite to the side wall (12) of the reflective component and is in contact with the side wall (12) of the reflective component, so that at least part of the light entering the transparent optical component (200) can be reflected by the bottom surface (240) and emitted from the light emitting surface (230) of the transparent optical component (200).
7. The optical structure according to claim 6, characterized in that: The bottom surface (240) of the transparent optical component (200) is provided with an aluminum coating layer.
8. The optical structure according to claim 6, characterized in that: The bottom surface (240) of the transparent optical component (200) is provided with an optical leather texture layer.
9. The optical structure according to claim 6, characterized in that: The light-emitting end (220) of the transparent optical component (200) is arranged obliquely relative to the bottom surface (240).
10. A vehicle lamp, comprising a light source (2) and an optical structure, characterized in that: The optical structure is an optical structure as claimed in any one of claims 1 to 9; The light source (2) is used to emit light to the optical structure.