Signal lamp optical system capable of uniformly emitting light
By combining reflective elements and refractive elements, the parabolic cylinder structure and collimation design are adopted, the problem of uneven distribution of light energy is solved, and uniform light output and high light efficiency are achieved.
Patent Information
- Application Number
- CN202422455756.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-11
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-10-11
AI Technical Summary
In the prior art, diffusing patterns on the surface of the reflector leads to ineffective use of light, resulting in uneven energy distribution and low light efficiency.
The reflective element and the refractive element are combined. The reflective element is a parabolic cylinder structure. The light distribution at the focus surface of the contour line of the refractive element is collimated, and combined with the diffusion pattern design, the uniform distribution of light is achieved.
At the same light-out angle, the energy distribution is approximately equal, which improves lighting uniformity and improves the light efficiency of the optical system.
Smart Images
Figure CN223153384U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automotive lighting, in particular to a signal light optical system with uniform light emission. Background Art
[0002] In the prior art, in order to improve the lighting uniformity, when a reflector is adopted, diffusion patterns are usually made on the surface of the reflector, and then patterns are added in the light-emitting direction to achieve lighting uniformity; after the light source passes through the reflector, due to the diffusion patterns on the surface of the reflector, part of the light cannot be effectively utilized to reach the light-emitting surface, and even some light, even if it reaches the light-emitting surface, is emitted at a large angle, far exceeding the viewing angle, so the human eye still feels uneven when observing. Therefore, the energy distribution of this solution is uneven and the light efficiency is low. Summary of the Utility Model
[0003] The utility model aims to solve at least one of the technical problems existing in the prior art.
[0004] For this reason, the utility model provides a signal light optical system with uniform light emission, which has uniform energy distribution and high light efficiency.
[0005] According to the signal light optical system with uniform light emission of the embodiment of the utility model, it has a reflecting element and a refracting element. In a vertical plane parallel to the light-emitting direction, the contour line of the reflecting element includes a parabola, the parabola has a focus of the reflecting element, the light source is located at the focus of the reflecting element, the reflecting element is a parabolic cylinder structure, and the reflecting element extends from the contour line to both sides; the refracting element is composed of a light-incident part and a light-emitting part of the refracting element. The contour line of the refracting element has a focus of the refracting element. In a plane perpendicular to the contour line of the reflecting element, the contour line of the refracting element has the function of collimating the light distribution at the focal plane, and the focal plane is a plane passing through the focus of the refracting element.
[0006] The beneficial effect of the utility model is that by combining the reflecting element and the refracting element, the light distribution at the focal plane is collimated in the vertical direction respectively, and further, at the same light-emitting angle, the energy is approximately equal, thereby improving the lighting uniformity; in addition, most of the light can be received by the optical elements, and the efficiency of the optical system is high.
[0007] According to an embodiment of the utility model, the contour line of the light-incident part of the refracting element in the horizontal plane is a first arc, the center of the first arc is located at a position 2 times the focal length of the reflecting element away from the focus position of the reflecting element, and the center of the first arc is located in the opposite direction of the light emission.
[0008] According to an embodiment of the present utility model, the contour line of the light-emitting part of the refraction element in the horizontal plane is a second curve, and the second curve has the function of collimating the light distribution at the focal plane in the horizontal plane; the refraction element is formed by the first arc and the second curve extending along the normal direction.
[0009] According to an embodiment of the present utility model, the contour line of the light-incident part of the refraction element in the horizontal plane is a curve, and the contour lines of the light-incident part and the light-emitting part of the refraction element jointly act to collimate the light distribution at the focal plane.
[0010] According to an embodiment of the present utility model, in the horizontal plane, along the light-emitting direction, the focus of the reflection element and the focus of the refraction element are located on the same straight line.
[0011] According to an embodiment of the present utility model, in the horizontal plane, the focus of the reflection element and the focus of the refraction element are located on the same straight line but deviate from the light-emitting direction.
[0012] According to an embodiment of the present utility model, the refraction element is composed of a plurality of refraction units having the same focus but different focal lengths.
[0013] According to an embodiment of the present utility model, the refraction element further includes a total reflection part.
[0014] According to an embodiment of the present utility model, a diffusion pattern is provided in the light-emitting direction of the refraction element.
[0015] Other features and advantages of the present utility model will be described in the following description, and some of them will become obvious from the description, or be understood by implementing the present utility model. The objectives and other advantages of the present utility model are achieved and obtained by the structures specifically pointed out in the description and the drawings.
[0016] To make the above objectives, features, and advantages of the present utility model more obvious and understandable, the following specific preferred embodiments are given in conjunction with the accompanying drawings and are described in detail as follows. Description of the Drawings
[0017] Figure 1 is a schematic structural diagram of Embodiment 1 of the present utility model;
[0018] Figure 2 is a schematic diagram of light rays in the horizontal plane of Embodiment 1;
[0019] Figure 3 is a schematic diagram of light rays in the vertical plane of Embodiment 1;
[0020] Figure 4 is a schematic structural diagram of Embodiment 2 of the present utility model;
[0021] Figure 5It is a schematic structural diagram of Embodiment 3 of the present utility model.
[0022] The reference numerals in the figure are: 1, reflection element; 2, refraction element; a, parabola; F, focus of the reflection element; O, focus of the refraction element; 21, light incident part of the refraction element; 22, light exiting part of the refraction element; b, first arc; f, focal length of the reflection element; c, second curve; C, first intersection point; D, second intersection point; 23, total reflection part. Specific embodiments
[0023] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0024] The uniform light-emitting signal lamp optical system of the embodiments of the present utility model will be specifically described below with reference to the drawings.
[0025] Embodiment 1
[0026] See Figure 1 、 Figure 2 and Figure 3 As shown in, and, the uniform light-emitting signal lamp optical system of the present utility model includes a reflection element 1 and a refraction element 2. In a vertical plane parallel to the light-emitting direction, the contour line of the reflection element 1 is a parabola a, and the contour lines of the refraction element 2 are parallel straight lines. The parabola a has a focus F of the reflection element, and the light source is located at the focus F of the reflection element. The reflection element 1 is a parabolic cylinder structure and is formed by extending the contour line a to both sides. It should be noted that the extension to both sides has three meanings: ① horizontal stretching; ② stretching along the normal direction of the plane where the parabola a is located (at this time, the plane where the parabola a is located deviates from the vertical plane by a certain angle); ③ the parabola a is located in the vertical plane, but is stretched at an angle that deviates from but is not perpendicular to the light-emitting direction.
[0027] The refraction element 2 is composed of a light incident part 21 and a light exiting part 22 of the refraction element. The contour line of the refraction element 2 has a focus O of the refraction element, and the focus O of the refraction element and the focus F of the reflection element do not coincide. In a plane perpendicular to the contour line of the reflection element (i.e., in the horizontal plane), the contour line of the refraction element 2 has the function of collimating the light distribution at the focal plane, and the focal plane is a vertical plane passing through the focus O of the refraction element.
[0028] The contour line of the light incident part 21 of the refraction element in the horizontal plane is the first arc b. The center O1 of the first arc b is located at a position 2 times the focal length f of the reflection element from the focus F of the reflection element (that is, the distance between the center O1 of the first arc b and the focus F of the reflection element is 2 times the focal length f of the reflection element), and the center O1 of the first arc b is located in the opposite direction of the light output.
[0029] The contour line of the light output part 22 of the refraction element in the horizontal plane is the second curve c. The second curve c has the function of collimating the light distribution at the focal plane in the horizontal plane; the refraction element 2 is formed by the first arc b and the second curve c extending along the normal direction.
[0030] In the horizontal plane, along the light output direction, the focus F of the reflection element and the focus O of the refraction element are on the same straight line. And the distance between the focus O of the refraction element and the focus F of the reflection element is 2 times the focal length f of the reflection unit.
[0031] Diffusion patterns are provided in the light output direction of the refraction element 2, making the lighting more uniform.
[0032] The principle of the signal light optical system with uniform light output to achieve uniform lighting is as follows: In the horizontal plane, the center of the light emitted by the light source is the brightest and becomes weaker towards both sides; when passing through the refraction element 2, it is emitted horizontally; define the axis passing through the focus O of the refraction element and parallel to the light output direction as the central axis OO ， , two straight lines passing through the focus O of the refraction element intersect with the light output part 22 of the refraction element. The two straight lines are the straight line OC on the outer side and the straight line OD on the inner side respectively. ∠COD = α, ∠DOO ， = β, and α = β. The two straight lines (the straight line OC and the straight line OD) intersect with the refraction element 2, and the horizontal projection dimensions of the two intersection points (the first intersection point C and the second intersection point D) are A. The horizontal projection dimension of the intersection point of the inner straight line OD and the central axis OO ， in the horizontal direction is B; A is less than B, but the inner energy is greater than the outer energy; therefore, a relatively uniform brightness distribution can be obtained, that is, uniform lighting is achieved.
[0033] The signal light optical system with uniform light output combines the reflection element 1 and the refraction element 2 to collimate the light distribution at the focal plane in the vertical direction respectively, further realizing that at the same light output angle, the energy is approximately equal, thereby improving the lighting uniformity; in addition, most of the light can be received by the optical elements, and the efficiency of the optical system is high.
[0034] Embodiment 2
[0035] See Figure 4, compared with Embodiment 1, the difference in Embodiment 2 is that: the refraction element 2 further includes a total reflection part 23. The refraction element 2 can be composed of multiple refraction units with the same focus but different focal lengths, and when part of the large-angle light reaches the refraction element 2, total internal reflection occurs inside, and the light cannot be refracted and emitted, and thus cannot be effectively utilized; therefore, based on this, a structure can be added to the side of the refraction element 2, and this structure includes a refraction light-incident part and the total reflection part 23, and the foci of the refraction light-incident part and the total reflection part 23 are the same as those of other refraction units. After the light emitted from the focus F of the reflection element passes through the reflection element 1 and then passes through this structure, the light can be emitted parallelly.
[0036] Embodiment 3
[0037] See Figure 5 , compared with Embodiment 1, the difference in Embodiment 3 is that: the contour line of the light-incident part 21 of the refraction element in the horizontal plane is an inclined straight line.
[0038] Embodiment 4
[0039] Compared with Embodiment 1, the difference in Embodiment 4 is that: the contour line of the light-incident part 21 of the refraction element in the horizontal plane is a curve, and the contour lines of the light-incident part 21 and the light-emitting part 22 of the refraction element jointly act to collimate the light distribution at the focal plane.
[0040] In other words, if the contour line of the light-incident part 21 of the refraction element in the horizontal plane is not a circular arc but other curves (ordinary curves), then this contour line needs to cooperate with the contour line of the light-emitting part 22 of the refraction element to jointly act to collimate the light distribution at the focal plane.
[0041] Of course, the contour lines of the light-emitting part 22 and the light-incident part 21 of the refraction element can be composed of more than one section of curve, but the contour lines of each section of the light-emitting and light-incident surfaces collimate the light distribution at the same focal plane. That is, the contour lines of the light-emitting part 22 and the light-incident part 21 of the refraction element are respectively composed of at least one section of curve.
[0042] Embodiment 5
[0043] Compared with Embodiment 1, the difference in Embodiment 5 is that: in the horizontal plane, the focus F of the reflection element and the focus O of the refraction element are on the same straight line but deviate from the light-emitting direction. That is, the straight line formed by connecting the focus F of the reflection element and the focus O of the refraction element deviates from the light-emitting direction by a certain angle.
[0044] The optical system of the signal lamp with uniform light emission of the present utility model can be placed in any plane.
[0045] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.
Claims
1. A signal lamp optical system with uniform light output, characterized in that: It has a reflecting element (1) and a refracting element (2). In a vertical plane parallel to the light-emitting direction, the contour line of the reflecting element (1) includes a parabola (a). The parabola (a) has a reflecting element focus (F). The light source is located at the reflecting element focus (F). The reflecting element (1) is a parabolic cylinder structure and is formed by extending from the contour line to both sides. The refracting element (2) is composed of a refracting element light-incident part (21) and a refracting element light-emitting part (22). The contour line of the refracting element (2) has a refracting element focus (O). In a plane perpendicular to the contour line of the reflecting element, the contour line of the refracting element (2) has the function of collimating the light distribution at the focal plane. The focal plane is a vertical plane passing through the refracting element focus (O).
2. The optical system of a signal lamp with uniform light emission according to claim 1, wherein: The contour line of the refracting element light-incident part (21) in the horizontal plane is a first circular arc (b). The center (O1) of the first circular arc (b) is located at a position 2 times the focal length (f) of the reflecting element away from the reflecting element focus (F), and the center (O1) of the first circular arc (b) is located in the opposite direction of the light-emitting direction.
3. The optical signal light system with uniform light emission according to claim 2, wherein: The contour line of the refracting element light-emitting part (22) in the horizontal plane is a second curve (c). The second curve (c) has the function of collimating the light distribution at the focal plane in the horizontal plane. The refracting element (2) is formed by extending the first circular arc (b) and the second curve (c) along the normal direction.
4. The signal lamp optical system with uniform light emission according to claim 1, wherein: The contour line of the refracting element light-incident part (21) in the horizontal plane is a curve. The contour lines of the refracting element light-incident part (21) and the refracting element light-emitting part (22) jointly act to collimate the light distribution at the focal plane.
5. The optical system of a signal lamp with uniform light emission according to claim 1, wherein: In the horizontal plane, along the light-emitting direction, the reflecting element focus (F) and the refracting element focus (O) are located on the same straight line.
6. The optical signal lamp system with uniform light emission according to claim 1, characterized in that: In the horizontal plane, the reflecting element focus (F) and the refracting element focus (O) are located on the same straight line but deviate from the light-emitting direction.
7. The optical signal lamp system with uniform light emission according to claim 1, characterized in that: The refracting element (2) is composed of a plurality of refracting units with the same focus but different focal lengths.
8. The signal lamp optical system with uniform light output according to claim 7, characterized in that: The refracting element (2) further includes a total reflection part (23).
9. The signal lamp optical system with uniform light output according to claim 1, characterized in that: A diffusion pattern is provided in the light-emitting direction of the refracting element (2).