Optical coupling structure with uniform energy distribution and vehicle lamp thereof
By designing an optical coupling structure with the light inlet part as an arc and the light inlet part as a curve, the problem of insufficient light efficiency loss and uniformity in the prior art is solved, and the uniformity of the light energy distribution and lighting effect are achieved.
Patent Information
- Application Number
- CN202422424952.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-10-08
AI Technical Summary
In the prior art, conventional methods lead to loss of light efficiency and cannot fundamentally solve the uniformity problem.
The light inlet part is designed to be an arc and the light out part is a curve. The imaginary focus of the curve is in the opposite direction of the light out direction. The light source coincides with the arc center. The light rays pass through the light inlet part and the light out part to achieve uniform energy distribution.
By designing an optical coupling structure, the energy of light rays is approximately equal in the same angle area, improving the light uniformity and achieving uniformity of the lighting effect.
Smart Images
Figure CN223153363U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of vehicle lamps, and particularly relates to an optical coupling structure with uniform energy distribution and a vehicle lamp thereof. Background Art
[0002] In the field of optics, improving the illumination uniformity is one of the important goals to ensure the performance of light sources. The conventional solutions for improving uniformity usually achieve it by adding patterns on the optical surface. However, this kind of solution often causes some light rays to be not effectively utilized. The refraction and reflection properties of the patterns may cause the light rays to be scattered at inappropriate angles, resulting in the loss of light efficiency and low light efficiency. Secondly, the diffusion angle of the patterns has certain limitations. Finally, adding patterns is just icing on the cake. In some cases, the uniformity cannot be improved fundamentally. Summary of the Utility Model
[0003] In view of this, in order to solve the problems existing in the prior art, the purpose of the utility model is to provide an optical coupling structure with uniform energy distribution, which has the effects of uniform energy distribution and improved light output uniformity.
[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0005] An optical coupling structure with uniform energy distribution, which includes: a light incident part and a light output part. The projection contour line of the light incident part on the horizontal plane is an arc, and the projection contour line of the light output part on the horizontal plane is a curve. The curve and the arc are arranged front and back along the driving direction. The light source is arranged coincidentally with the center O of the arc. The light rays emitted by the light source pass through the light incident part and the light output part in sequence and then are emitted. The curve has a virtual focus O', and the virtual focus O' is located in the reverse direction of the light output direction.
[0006] The specific technical effect is: by designing the projection contour line of the light incident part on the horizontal plane as an arc, the propagation direction of the light rays remains unchanged after passing through the light incident part. By designing the projection contour line of the light output part on the horizontal plane as a curve and the virtual focus O' of the curve is located in the reverse direction of the light output direction, the energy of the light rays emitted by the light source in the same angular region is approximately equal, so that when observed from a certain direction, the lighting is uniform.
[0007] Further, the curve has a virtual focus O', the virtual focus O' is located behind the center O and has a distance L from the center O. The reverse extension lines of the emitted light rays after passing through the light output part converge at the virtual focus O'.
[0008] Further, the focus of the curve coincides with the center O. The curve has a virtual focus O', and the virtual focus O' is located at the reverse infinity of the light output direction. The emitted light rays after passing through the light output part are parallel to each other.
[0009] The specific technical effect is that when the focus of the curve coincides with the center O of the circle, the light rays emitted by the light source are refracted by the light incident part and the light emitting part, and then collimated into parallel light rays for emission. It can be understood that the virtual focus O' is located at the infinite distance in the reverse direction of the light emitting direction, that is, the reverse extension lines of the parallel emitted light rays converge at the virtual focus O' at infinity.
[0010] Furthermore, the optical axis of the light source is arranged parallel to the driving direction.
[0011] The specific technical effect is that the position of the light source is set according to actual needs. When the light source is arranged horizontally, the optical axis of the light source is parallel to the driving direction.
[0012] Furthermore, there is an included angle between the optical axis of the light source and the driving direction.
[0013] The specific technical effect is that the position of the light source is set according to actual needs. When the light source is arranged obliquely from left to right, there is an included angle between the optical axis of the light source and the driving direction.
[0014] Furthermore, the projection contour line of the light emitting part on the horizontal plane is composed of multiple curves with different focal lengths, and there is a common focus between the multiple curves.
[0015] The specific technical effect is that different focal lengths can adjust the brightness.
[0016] Furthermore, the projection contour line of the light incident part on the vertical plane is one or more curves.
[0017] The specific technical effect is that adopting such a structure has a collimating effect on the light emitted by the light source in the vertical direction.
[0018] A vehicle lamp, which includes a plurality of the above-mentioned light coupling structures with uniform energy distribution as described in any one of the above, and the plurality of light coupling structures are arranged in sequence along the horizontal direction or arranged in sequence obliquely from left to right.
[0019] The beneficial effects of the present utility model are as follows:
[0020] By designing the projection contour line of the light incident part on the horizontal plane as an arc, the propagation direction of the light rays passing through the light incident part will not change. By designing the projection contour line of the light emitting part on the horizontal plane as a curve and the virtual focus O' of the curve being located in the reverse direction of the light emitting direction, the energy of the light rays emitted by the light source within the same angular region is approximately equal, so that when observed from a certain direction, the lighting is uniform, improving the light emission uniformity.
[0021] To make the above objects, features and advantages of the present utility model more obvious and understandable, the following specific preferred embodiments are given and described in detail in conjunction with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0023] Figure 1 is the projection view of the horizontal plane of Embodiment 1 of the present utility model;
[0024] Figure 2 is Figure 1 the schematic diagram of the energy distribution of
[0025] Figure 3 is the projection view of the horizontal plane of Embodiment 2 of the present utility model;
[0026] Figure 4 is the structural schematic diagram of Embodiment 3 of the present utility model;
[0027] Figure 5 is the projection view of the horizontal plane of Embodiment 4 of the present utility model.
[0028] In the figure:
[0029] 1, light incident part; 2, light output part; 3, arc; 4, curve; 5, light source; 6, optical axis; 7, isometric line segment; 8, light output channel. Specific embodiments
[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions of the present utility model with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.
[0031] Embodiment 1:
[0032] As Figures 1 to 2As shown in the figure, there is an optical coupling structure with uniform energy distribution. Set the driving direction as X, and there are a light incident part 1 and a light output part 2. The projected contour line of the light incident part 1 on the horizontal plane is an arc 3. The light incident part 1 has a collimating effect on light in the vertical plane. The projected contour line of the light output part 2 on the horizontal plane is a curve 4. The projected contour lines of the light incident part 1 and the light output part 2 on the vertical plane are both straight lines. The curve 4 and the arc 3 are arranged front and back along the driving direction. The light source 5 is set to coincide with the center O of the arc 3. The light rays emitted by the light source 5 pass through the light incident part 1 and the light output part 2 in sequence and then are emitted. The curve 4 has a virtual focus O'. The virtual focus O' is located behind the center O and has a spacing L from the center O. The reverse extension lines of the emitted light rays after passing through the light output part 2 converge at the virtual focus O'. The optical axis 6 rotates around the center O to both sides at equal angles to form four equal-angle line segments 7. An optical output channel 8 is formed between adjacent two equal-angle line segments 7. The energies of the light rays emitted through several optical output channels 8 are approximately equal.
[0033] Set the intersection point of the optical axis 6 of the light source 5 and the curve 4 in the horizontal plane as point F. The intersection points of the two equal-angle line segments 7 on the left side of the optical axis 6 and the curve 4 are point A and point B respectively. The intersection points of the two equal-angle line segments 7 on the right side of the optical axis 6 and the curve 4 are point C and point D respectively. Then ∠AOB = ∠BOF = ∠COF = ∠DOC;
[0034] Set the luminous flux of the light rays emitted by the light source 5 passing through the arc as S1, and the projected length of the arc in the driving direction as L1. Then the brightness of the light rays emitted by the light source 5 passing through the arc is N1, and N1 = S1 / L1; Set the luminous flux of the light rays emitted by the light source 5 passing through the arc as S2, and the projected length of the arc in the driving direction as L2. Then the brightness of the light rays emitted by the light source 5 passing through the arc is N2, and N2 = S2 / L2; Set the luminous flux of the light rays emitted by the light source 5 passing through the arc as S3, and the projected length of the arc in the driving direction as L3. Then the brightness of the light rays emitted by the light source 5 passing through the arc is N3, and N3 = S3 / L3; Set the luminous flux of the light rays emitted by the light source 5 passing through the arc as S4, and the projected length of the arc in the driving direction as L4. Then the brightness of the light rays emitted by the light source 5 passing through the arc is N4, and N4 = S4 / L4; Then N2 ≈ N3 ≈ N4, and N1 < N2.
[0035] It should be noted here that: Since the light rays are most concentrated on both sides of the optical axis 6 and the luminous flux is the highest, theoretically the luminous flux S2 = S3, S1 = S4, and the luminous fluxes S2 and S3 are greater than the luminous fluxes S1 and S4, as Figure 3 shown, the projection lengths L1 = L2 > L3 > L4, then theoretically N1 < N2, N2 < N3, N3 = N4. Since from Figure 2 shown, the arc has a larger curvature, then part of the light rays reaching the section cannot exit due to total internal reflection inside, so the actual luminous flux S3 exiting from the arc is less than S2. Therefore, actually N2 ≈ N3, then N2 ≈ N3 ≈ N4, N1 < N2. In practical applications, there is an angle between the optical axis 6 of most light sources 5 and the driving direction. Therefore, in order to make the energy distribution uniform, the arc part can be discarded, and multiple such light coupling structures are arranged in the horizontal direction or along the inclined modeling direction to achieve the uniformity of the light distribution.
[0036] The above is only a preferred embodiment of the present invention, and does not limit the implementation manners and protection scope of the present invention accordingly.
[0037] The present invention further has the following implementation manners on the above basis:
[0038] Embodiment 2:
[0039] As Figure 3 shown,
[0040] The difference from Embodiment 1 is that:
[0041] A vehicle lamp includes a plurality of light coupling structures, and the plurality of light coupling structures are arranged in an inclined order from left to right. In each light coupling structure, the focus of the curve 4 coincides with the center of the circle O, and the curve 4 has an imaginary focus O'. The imaginary focus O' is located at the infinite distance in the reverse direction of the light exit direction. Therefore, the light rays exiting through the light exit part 2 are parallel to each other.
[0042] It should be noted here that: When the focus of the curve 4 coincides with the center of the circle O, the light rays emitted by the light source 5 are refracted by the light incident part 1 and the light exit part 2 and then collimated into parallel light and exit. Then, the fact that the imaginary focus O' is located at the infinite distance in the reverse direction of the light exit direction can be understood as: the reverse extension lines of the parallel exiting light rays converge at the imaginary focus O' at infinity, and the exiting light rays can be parallel to the driving direction or parallel to each other but not parallel to the driving direction.
[0043] Embodiment 3:
[0044] As Figure 4 shown,
[0045] The difference from Embodiment 1 is as follows:
[0046] The projected contour line of the light incident part 1 in the vertical plane is one or more curves 4, for example: the sectional curves 4 of a condenser, a lens, or a Fresnel lens.
[0047] It should be noted here that: when the projected contour line of the light incident part 1 in the vertical plane is one or more curves 4, it has a collimating effect on the light emitted by the light source 5 passing through the light incident part 1 in the vertical direction, and the light is collimated into parallel light.
[0048] Embodiment 4:
[0049] As Figure 5 shown,
[0050] The difference from Embodiment 1 is as follows:
[0051] In the horizontal plane, the projected contour line of the light emitting part 2 in the horizontal plane is composed of multiple curves with different focal lengths, and there is a common focus among these multiple curves.
[0052] It should be noted here that: passing through the center O of the circle and parallel to the optical axis 6 direction of the light source 5, the energy is the strongest, and the energy on both sides of the optical axis 6 decreases successively. Therefore, according to actual needs, at the position directly facing the optical axis 6, the focal length of the light emitting part 2 can be set to a relatively small focal length, and at the places where the energy is weak on both sides, the focal length of the light emitting part 2 can be set to be larger to ensure that the brightness is approximately equal in the final light emitting direction. Therefore, the light emitting parts 2 with different focal lengths can adjust the brightness according to the lighting effect.
[0053] In summary, the beneficial effects of the present utility model are as follows:
[0054] By designing the projected contour line of the light incident part 1 in the horizontal plane as an arc 3, the propagation direction of the light passing through the light incident part 1 will not be changed. By designing the projected contour line of the light emitting part 2 in the horizontal plane as a curve 4 and the virtual focus O' of the curve 4 is located in the reverse direction of the light emitting direction, the energy between the light rays emitted after the light emitted by the light source 5 passes through several light emitting channels 8 is equal, so that the energy distribution is uniform and the light emitting uniformity is improved.
[0055] All the devices selected in this application are common standard parts or components 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 obtained through conventional experimental methods.
[0056] In the description of the embodiments of the present utility model, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0057] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0058] Based on the above inspiration from the ideal embodiments of the present utility model, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. An optical coupling structure with uniform energy distribution, characterized in that Comprising: A light incident part (1) and a light emitting part (2), the projection contour line of the light incident part (1) on the horizontal plane is an arc (3), the projection contour line of the light emitting part (2) on the horizontal plane is a curve (4), the curve (4) and the arc (3) are arranged front and back along the driving direction, a light source (5) is arranged coincidentally with the center O of the arc (3), the light emitted by the light source (5) sequentially passes through the light incident part (1) and the light emitting part (2) and then exits, the curve (4) has a virtual focus O', and the virtual focus O' is located in the reverse direction of the light emitting direction.
2. The optical coupling structure with uniform energy distribution as described in claim 1, characterized in that, The curve (4) has a virtual focus O', the virtual focus O' is located behind the center O and has a distance L from the center O, and the reverse extension lines of the light rays exiting after passing through the light emitting part (2) converge at the virtual focus O'.
3. The optical coupling structure with uniform energy distribution as described in claim 1, characterized in that, The focus of the curve (4) is arranged coincidentally with the center O, the curve (4) has a virtual focus O', the virtual focus O' is located at an infinite distance in the reverse direction of the light emitting direction, and the light rays exiting after passing through the light emitting part (2) are parallel to each other.
4. A light coupling structure with uniform energy distribution as described in claim 1, characterized in that, The projection contour line of the light emitting part (2) on the horizontal plane is composed of multiple curves (4) with different focal lengths, and there is a common focus among the multiple curves (4).
5. An optical coupling structure with uniform energy distribution as described in claim 1, characterized in that, The optical axis (6) of the light source (5) is arranged parallel to the driving direction.
6. The optical coupling structure with uniform energy distribution as described in claim 1, characterized in that There is an included angle between the optical axis (6) of the light source (5) and the driving direction.
7. A light coupling structure with uniform energy distribution as described in claim 1, characterized in that, The projection contour line of the light incident part (1) on the vertical plane is one or more curves (4).
8. A vehicle lamp, characterized in that, Including a plurality of a light coupling structure with uniform energy distribution according to any one of claims 1 to 7, and the plurality of light coupling structures are arranged sequentially along the horizontal direction or arranged sequentially obliquely from left to right.