Multifunctional multiplexing light guide body and vehicle lamp thereof
By designing the second reflection surface of the elliptic curve and the direct surface of the arc or small elliptic curve in the light guide, the problems of multiple light sources defocusing and light type offset in the existing light guide are solved, and an efficient light type centering effect on the optical system and regulatory screen is achieved.
Patent Information
- Application Number
- CN202422000236.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-16
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-08-16
AI Technical Summary
The existing multi-function multiplexed light guides place LEDs at the focus, resulting in a reduction in the overall light efficiency of the optical system and a defocusing problem, resulting in a deviation of the light type on the regulatory screen, increasing the risk of the regulatory system.
A multifunctional multiplexed light guide is designed, wherein the second reflective surface is designed as an elliptical curve on the cross section. Using the focal characteristics of the ellipse, the luminous point of the light source overlaps with one focus point, and the light ray is focused on the other focus point, thereby solving the problem of defocusing multiple light sources. At the same time, the direct surface is designed as an arc or small elliptical curve to avoid refraction of light and allow light to converge at the first focal position close to the light inlet.
The overall light efficiency of the optical system is achieved, and the centering of the optical type on the screen will not cause deviation, reducing the risk of regulations.
Smart Images
Figure CN222864748U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of light guides, and in particular relates to a multifunctional multiplexed light guide and a vehicle lamp thereof. Background Art
[0002] As a key device for guiding and transmitting optical signals, the working principle of the light guide is based on the reflection and refraction characteristics of light. Its working principle and application are extensive. It is an important part of optical technology and is widely used in optical communications, optical sensing, optical display, optical imaging and other fields.
[0003] Most of the existing multifunctional and reused light guides place two LEDs at the focal point. The light-emitting centers of these two LEDs all deviate from the light-emitting focus of the optical system. This disadvantage leads to a reduction in the overall light efficiency of the optical system, and the defocus problem causes the light pattern of the traffic light on the regulation screen to shift, which makes the regulation have a greater risk of NG. Utility Model Content
[0004] In view of this, in order to solve the problems existing in the prior art, the purpose of the utility model is to provide a multifunctional multiplexed light guide and a car light thereof, which has the effect that multiple light sources can be in focus, the optical system has a high light efficiency, and the light type is centered on the regulatory screen.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] A multifunctional multiplexed light guide, comprising: a first light guide, the first light guide having a first reflective surface, a light outlet opening at the upper end of the first light guide, a light inlet opening at the lower end of the first light guide, and the first reflective surface being arranged close to the light inlet;
[0007] At least one second light guide member, the second light guide member is arranged at the lower end of the first light guide member, the second light guide member has a second reflecting surface and a direct surface, the direct surface is arranged at the lower end of the second reflecting surface, the second reflecting surface is a part of a large elliptical curve in cross section, the large elliptical curve has two first foci, one of the first foci is located below the light inlet, the direct surface is an arc or a small elliptical curve in cross section, the center of the arc or the focus of the small elliptical curve is arranged to coincide with the other first focus.
[0008] The specific technical effect is: by designing the second reflecting surface as an elliptical curve in cross section, using the characteristic that an ellipse has two foci and light emitted from one focus will always converge at the other focus, the light-emitting point of the light source is made to coincide with one of the first foci, then the light emitted by the light source will be focused on the other first focus, and can be equivalent to the light emitted by the light source at the other first focus position, and all are not defocused, and then emitted from the light outlet of the first light guide, thereby solving the problem of defocus of multiple light sources; by designing the direct surface as an arc or a small elliptical curve in cross section, the light emitted from the light source from the first focus will not be refracted through the direct surface, so that the light can be converged at the first focus position close to the light inlet, the overall light efficiency of the optical system is high, and the light pattern on the regulatory screen is centered without deviation.
[0009] Furthermore, the first reflection surface is a part of a parabolic curve in cross section, and the parabolic curve has a second focus, and the second focus coincides with the first focus close to the light inlet.
[0010] The specific technical effect is that the first reflection surface is designed as a parabolic curve in cross section, so that light entering from the light inlet is transformed into parallel light and emitted from the light outlet of the first light guide member after hitting the first reflection surface.
[0011] Furthermore, the first reflecting surface is a straight line in cross section.
[0012] The specific technical effect is: the first reflective surface is designed to be a straight line in cross section, so that the light entering from the light inlet is reflected multiple times after hitting the first reflective surface, and then mixed multiple times and emitted from the light outlet of the first light guide, making the multiplexed light guide emit light more uniformly.
[0013] Furthermore, the first light guide member also has a third reflecting surface, and the third reflecting surface is connected to the upper end of the first reflecting surface.
[0014] Furthermore, the third reflecting surface is a straight line in cross section.
[0015] The specific technical effect is: a third straight reflecting surface is arranged on the upper end of the first reflecting surface, so that the light is reflected and mixed multiple times, thereby increasing the uniformity of the light emission of the multiplexed light guide.
[0016] Furthermore, the number of the second light guide members is two, and the two second light guide members are respectively arranged on both sides of the lower end of the first light guide member, and the first focal points of the two second light guide members close to the light inlet are arranged to overlap with each other.
[0017] The specific technical effect is: by adopting the design of two second light guides, no matter which light source located at the first focus of the second light guide is lit, light can be emitted from the light outlet of the multiplexed light guide.
[0018] Furthermore, the first light guide member has a first light guide space, and the light outlet and the light inlet are respectively connected to two ends of the first light guide space.
[0019] The specific technical effect is that after the light enters from the light inlet, it is reflected by the first reflection surface and then emitted to the light outlet in the first light guiding space.
[0020] Furthermore, the second reflective surface and the direct surface together form a second light guiding space, and the upper end of the second light guiding space is connected to the light inlet.
[0021] The specific technical effect is that the light emitted from the first focus of the light source passes through the direct surface, hits the second reflecting surface, is reflected by the second reflecting surface, and is focused on another first focus in the second light guiding space.
[0022] A vehicle lamp, comprising a light source and a multifunctional multiplexed light guide as described in any one of the above items, wherein the light-emitting point of the light source, the center of the arc or the focus of the small elliptical curve and another first focus coincide with each other.
[0023] The beneficial effects of the utility model are:
[0024] (1) By designing the second reflecting surface as an elliptical curve in cross section, and taking advantage of the fact that an ellipse has two foci and light emitted from one focus will always converge at the other focus, the light emitting point of the light source is made to coincide with one of the first foci. Then, the light emitted by the light source will all be focused on the other first focus and will all be equivalent to the light emitted by the light source at the other first focus position without defocus. Then, the light will be emitted from the light outlet of the first light guide, thereby solving the problem of defocus of multiple light sources.
[0025] (2) By designing the cross section of the direct surface as an arc or a small elliptical curve, the light emitted from the first focus of the light source will not be refracted through the direct surface, so that the light can be gathered at the first focus position close to the light inlet. The overall light efficiency of the optical system is high, and the light pattern on the regulatory screen is centered and will not be offset.
[0026] 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
[0027] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0028] Figure 1 It is a structural schematic diagram of the utility model;
[0029] Figure 2 is a light propagation diagram of Example 1;
[0030] Figure 3 This is the light propagation diagram of Example 2.
[0031] In the figure:
[0032] 1. First light guide member; 2. First reflection surface; 3. Light outlet; 4. Light inlet; 5. Second light guide member; 6. Second reflection surface; 7. Direct surface; 8. First light guide space; 9. Second light guide space; 10. First focus; 11. Second focus; 12. Third reflection surface; 13. Light source. DETAILED DESCRIPTION
[0033] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0034] Embodiment 1:
[0035] like Figure 1 to Figure 2 As shown, a multifunctional multiplexed light guide and a vehicle light thereof include a first light guide member 1 and two second light guide members 5, the first light guide member 1 having a first reflecting surface 2, a light outlet 3 being provided at the upper end of the first light guide member 1, a light inlet 4 being provided at the lower end of the first light guide member 1, and the first reflecting surface 2 being arranged close to the light inlet 4; the two second light guide members 5 are respectively arranged on both sides of the lower end of the first light guide member 1, the second light guide member 5 having a second reflecting surface 6 and a directing surface 7, the directing surface 7 being arranged at the lower end of the second reflecting surface 6, the second reflecting surface 6 being a part of a large elliptical curve in cross section, the large elliptical curve having two first foci 10, one of the first foci 10 being located below the light inlet 4, the directing surface 7 being an arc or a small elliptical curve in cross section, the light emitting point of the light source 13, the center of the arc or the focus of the small elliptical curve being arranged to coincide with the other first focus 10, and the first foci 10 of the two second light guide members 5 close to the light inlet 4 being arranged to coincide with each other.
[0036] It should be noted here that: by designing the second reflecting surface 6 as an elliptical curve in cross section, and utilizing the characteristic that an ellipse has two foci and light emitted from one focus will always converge at the other focus, the light-emitting point of the light source 13 is made to coincide with one of the first foci 10, and the light emitted by the light source 13 will all be focused on the other first focus 10, and can all be equivalent to the light emitted by the light source 13 at the position of the other first focus 10, and all are not defocused, and then emitted from the light outlet 3 of the first light guide 1, thereby solving the problem of defocus of multiple light sources 13; by designing the direct surface 7 as an arc or a small elliptical curve in cross section, the light emitted from the first focus 10 of the light source 13 will not be refracted through the direct surface 7, so that the light can be converged at the position of the first focus 10 close to the light inlet 4, the overall light efficiency of the optical system is high, and the light type on the regulatory screen is centered without deviation.
[0037] The first reflection surface 2 is a part of a parabola curve in cross section. The parabola curve has a second focus 11 . The second focus 11 coincides with a first focus 10 close to the light inlet 4 .
[0038] It should be noted here that the first reflective surface 2 is designed as a parabolic curve in cross section, so that light entering from the light inlet 4 is transformed into parallel light and emitted from the light outlet 3 of the first light guide 1 after hitting the first reflective surface 2 .
[0039] The first light guide member 1 has a first light guide space 8 , and the light outlet 3 and the light inlet 4 are connected to two ends of the first light guide space 8 respectively.
[0040] It should be noted that: after entering from the light inlet 4 , the light is reflected by the first reflection surface 2 and then emitted to the light outlet 3 in the first light guiding space 8 .
[0041] The second reflective surface 6 and the direct surface 7 together form a second light guiding space 9 , and the upper end of the second light guiding space 9 is connected to the light inlet 4 .
[0042] It should be noted here that the light emitted from the first focus 10 by the light source 13 passes through the direct surface 7 and hits the second reflective surface 6 , and is reflected by the second reflective surface 6 and focused on another first focus 10 in the second light guiding space 9 .
[0043] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention.
[0044] The utility model also has the following implementation methods based on the above:
[0045] Embodiment 2:
[0046] like Figure 3 As shown,
[0047] The difference from Example 1 is that:
[0048] The first reflecting surface 2 is a straight line in cross section.
[0049] It should be noted here that: the first reflective surface 2 is designed to be a straight line in cross section, so that the light entering from the light inlet 4 is reflected and mixed multiple times after hitting the first reflective surface 2, and then emitted from the light outlet 3 of the first light guide 1, making the multiplexed light guide emit light more uniformly.
[0050] The first light guide member 1 further has a third reflecting surface 12 , and the third reflecting surface 12 is connected to the upper end of the first reflecting surface 2 .
[0051] The third reflecting surface 12 is a straight line in cross section.
[0052] It should be noted here that: a third straight reflecting surface 12 is provided on the upper end of the first reflecting surface 2 so that the light is reflected and mixed multiple times, thereby increasing the uniformity of the light emission of the multiplexed light guide.
[0053] In summary, the beneficial effects of the utility model are:
[0054] (1) By designing the second reflecting surface 6 as an elliptical curve in cross section, and taking advantage of the fact that an ellipse has two foci and light emitted from one focus always converges at the other focus, the light emitting point of the light source 13 is made to coincide with one of the first foci 10. Then, the light emitted by the light source 13 will all be focused on the other first focus 10, and will all be equivalent to the light emitted by the light source 13 at the position of the other first focus 10, and all will not be defocused. Then, the light will be emitted from the light outlet 3 of the first light guide 1, thereby solving the problem of defocusing of multiple light sources 13.
[0055] (2) By designing the cross section of the direct surface 7 as an arc or a small elliptical curve, the light emitted from the first focus 10 by the light source 13 will not be refracted through the direct surface 7, so that the light can be gathered at the position of the first focus 10 close to the light inlet 4. The overall light efficiency of the optical system is high, and the light pattern on the regulatory screen is centered and will not be offset.
[0056] The various devices selected in this application are all universal standard parts or parts known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.
[0057] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0058] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0059] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. A multifunctional multiplexed light guide, characterized in that: include: A first light guide member (1), the first light guide member (1) having a first reflective surface (2), a light outlet (3) being provided at the upper end of the first light guide member (1), a light inlet (4) being provided at the lower end of the first light guide member (1), and the first reflective surface (2) being arranged close to the light inlet (4); At least one second light guide (5), the second light guide (5) being arranged at the lower end of the first light guide (1), the second light guide (5) having a second reflecting surface (6) and a directing surface (7), the directing surface (7) being arranged at the lower end of the second reflecting surface (6), the second reflecting surface (6) being a part of a large elliptical curve in cross section, the large elliptical curve having two first foci (10), one of the first foci (10) being located below the light inlet (4), the directing surface (7) being an arc or a small elliptical curve in cross section, the center of the arc or the focus of the small elliptical curve being arranged to coincide with the other first focus (10).
2. A multifunctional multiplexed light guide as claimed in claim 1, characterized in that: The first reflecting surface (2) is a part of a parabolic curve in cross section, and the parabolic curve has a second focus (11), and the second focus (11) coincides with the first focus (10) close to the light inlet (4).
3. A multifunctional multiplexed light guide as claimed in claim 1, characterized in that: The first reflecting surface (2) is a straight line in cross section.
4. A multifunctional multiplexed light guide as claimed in claim 3, characterized in that: The first light guide member (1) also has a third reflection surface (12), and the third reflection surface (12) is connected to the upper end of the first reflection surface (2).
5. A multifunctional multiplexed light guide as claimed in claim 4, characterized in that: The third reflecting surface (12) is a straight line in cross section.
6. A multifunctional multiplexed light guide as claimed in claim 1, characterized in that: The number of the second light guide members (5) is two, and the two second light guide members (5) are respectively arranged on both sides of the lower end of the first light guide member (1), and the two second light guide members (5) are arranged to overlap with each other near a first focal point (10) of the light inlet (4).
7. A multifunctional multiplexed light guide as claimed in claim 1, characterized in that: The first light guide member (1) has a first light guide space (8), and the light outlet (3) and the light inlet (4) are respectively connected to two ends of the first light guide space (8).
8. A multifunctional multiplexed light guide as claimed in claim 1, characterized in that: The second reflecting surface (6) and the directing surface (7) together form a second light guiding space (9), and the upper end of the second light guiding space (9) is connected to the light inlet (4).
9. A vehicle lamp, characterized in that: It comprises a light source (13) and a multifunctional multiplexed light guide as claimed in any one of claims 1 to 8, wherein the light emitting point of the light source (13), the center of the arc or the focus of the small elliptical curve and another first focus (10) coincide with each other.