Reflection-type optical system capable of achieving uniform lighting and vehicle lamp

Abstract

The utility model belongs to the technical field of vehicle lamps, and discloses a reflective optical system capable of achieving even lighting and a vehicle lamp. The reflective optical system capable of realizing uniform lighting is provided with one or a plurality of reflection units, each reflection unit comprises a light source and a first reflection unit, and the first reflection unit collimates light emitted by the light source into parallel light or approximately parallel light in a vertical plane; the second reflection unit collimates the light rays output by the first reflection unit into parallel light or approximately parallel light in the horizontal plane, so that the brightness of the emitted light rays is approximately equal; the first reflection unit is a parabolic cylinder reflection unit, the second reflection unit is a parabolic cylinder reflection unit, and the light source coincides with the focus a of the first reflection unit. According to the utility model, the uniformity of energy distribution can be improved, so that the lighting uniformity is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle lamps, in particular to a reflective optical system and a vehicle lamp that achieve uniform lighting. Background Art

[0002] When using a reflector as the primary optical system, diffusion patterns are usually directly made on the surface of the reflector, and then patterns are added in the light-emitting direction to achieve lighting uniformity. However, this solution has low light efficiency. Since the light source passes through the reflector, due to the diffusion patterns on the surface of the reflector, some light rays cannot be effectively utilized, especially large-angle light rays, resulting in uneven energy distribution and low light efficiency. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies in the prior art and provide a reflective optical system and a vehicle lamp that achieve uniform lighting.

[0004] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0005] A reflective optical system that achieves uniform lighting has one or several reflection units, and the reflection unit includes:

[0006] A light source,

[0007] A first reflection unit that collimates the light rays emitted by the light source into parallel light or approximately parallel light in the vertical plane;

[0008] A second reflection unit that collimates the light rays output by the first reflection unit into parallel light or approximately parallel light in the horizontal plane, so as to achieve approximately equal brightness of the emitted light rays;

[0009] The first reflection unit is a parabolic cylinder reflection unit, the second reflection unit is a parabolic cylinder reflection unit, and the light source is arranged to coincide with the focus a of the first reflection unit.

[0010] Further, the focus b of the second reflection unit is located outside the focus a of the first reflection unit, and the distance L between the focus b and the focus a is L = 2f, where f is the focal length of the first reflection unit.

[0011] Further, the reflection unit further includes a third reflection unit and a fourth reflection unit. The third reflection unit and the first reflection unit are symmetrically distributed left and right, the third reflection unit and the first reflection unit have the same focus in the vertical plane, and they intersect;

[0012] The fourth reflection unit and the second reflection unit are symmetrically distributed left and right, and the fourth reflection unit and the second reflection unit have the same focal length in the horizontal plane, and their respective focus positions are symmetrically arranged along the optical axis;

[0013] The light source is located above the intersection of the third reflection unit and the first reflection unit.

[0014] Further, the reflecting surface of the second reflection unit is a smooth surface structure or a pattern structure.

[0015] Further, the second reflection unit is composed of multiple curved surfaces with the same focus and different focal lengths, and the multiple curved surfaces form a stepped structure.

[0016] Further, the reflecting surface of the fourth reflection unit is a smooth surface structure or a pattern structure.

[0017] Further, the fourth reflection unit is composed of multiple curved surfaces with the same focus and different focal lengths, and the multiple curved surfaces form a stepped structure.

[0018] Further, it further includes a diffusion pattern, and the diffusion pattern is located in the light-emitting direction of the reflective optical system and outside the reflective optical system.

[0019] A vehicle lamp includes the reflective optical system for achieving uniform lighting as described above.

[0020] The beneficial effects of the present utility model are as follows: The structure of the present utility model is simple and reasonably designed. The first reflection unit is a parabolic cylindrical reflection unit. On the one hand, it can effectively collect the light emitted by the light source and improve the effective utilization of the light. On the other hand, it can collimate these lights into parallel lights or approximately parallel lights in the vertical plane. The second reflection unit is a parabolic cylindrical reflection unit, which can improve the uniformity of the energy distribution, thereby achieving uniform lighting. Description of the Drawings

[0021] 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.

[0022] Figure 1 It is a schematic structural diagram of the reflection unit in Embodiment 1;

[0023] Figure 2 It is an optical path diagram of the reflection unit in Embodiment 1;

[0024] Figure 3 It is Figure 2 the top view of

[0025] Figure 4 It is a schematic diagram of uniform lighting principle of the second reflection unit in Embodiment 1;

[0026] Figure 5 It is the layout diagram of the reflection units in Embodiment 1;

[0027] Figure 6 It is the schematic structural diagram of the reflection units in Embodiment 4;

[0028] Figure 7 is Figure 6 the top view of;

[0029] Figure 8 It is the schematic diagram of the pattern structure in the second reflection unit or the fourth reflection unit.

[0030] In the figure: 1. Light source, 2. First reflection unit, 3. Second reflection unit, 4. Third reflection unit, 5. Fourth reflection unit, 6. Straight line segment, 7. Curved surface. Specific embodiments

[0031] It should be noted that the following detailed description is exemplary and is intended to provide further illustration of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. As used herein, unless the context clearly indicates otherwise, the singular form also includes the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.

[0034] Embodiment 1

[0035] As Figures 1 to 5 shown in the reflection optical system for achieving uniform lighting, which has one or several reflection units, and the reflection units include:

[0036] Light source 1,

[0037] First reflection unit 2, and the first reflection unit 2 collimates the light emitted by the light source 1 into parallel light or approximately parallel light in the vertical plane;

[0038] A second reflecting unit 3, which collimates the light output by the first reflecting unit 2 into parallel light or approximately parallel light in a horizontal plane;

[0039] The first reflection unit 2 is a parabolic reflection unit, the second reflection unit 3 is a parabolic reflection unit, and the focus a of the light source 1 and the first reflection unit 2 are arranged to coincide with each other.

[0040] The focus b of the second reflecting unit 3 is located outside the focus a of the first reflecting unit 2 , and the distance L between the focus b and the focus a is 2f, where f is the focal length of the first reflecting unit 2 .

[0041] The reflective surface of the second reflective unit 3 is a light surface structure.

[0042] A vehicle lamp comprises the reflective optical system for achieving uniform lighting as described above.

[0043] In this embodiment, the reflective units may be arranged in order according to the shape of the vehicle lights.

[0044] In this embodiment, the X direction is defined as the driving direction, and the light emitting direction is parallel to and consistent with the driving direction. The light emitted by the light source 1 is reflected by the first reflection unit 2 and reaches the second reflection unit 3. The first reflection unit 2 is a parabolic reflection unit. On the one hand, it can effectively collect the light emitted by the light source 1 to improve the effective use of the light, and on the other hand, it can collimate the light into parallel light or approximately parallel light in the vertical plane.

[0045] like Figure 4 As shown, in the horizontal plane, when the light emitted from the front and rear boundaries of the light source 1 reaches the same point on the contour line of the second reflection unit 3, the closer the distance to the contour line, that is, the smaller the focal length, the larger the reflected light cone angle; since the smaller the focal length, the stronger the energy; since the brightness is equal to the energy in a certain direction divided by the area, the brightness at different locations is approximately equal, so a relatively uniform lighting effect can be achieved.

[0046] Example 2

[0047] like Figure 8 As shown, the difference from Example 1 is that the second reflection unit 3 is composed of multiple curved surfaces 7 with the same focus and different focal lengths. The curved surfaces 7 are connected by straight line segments to form a step-like structure.

[0048] The above-mentioned multi-segment curved surface structure makes the second reflecting unit 3 a reflecting unit with the same focus but different focal lengths. The energy is strongest in the direction passing through the first reflecting unit 2 and parallel to the optical axis of the first reflecting unit 2, and gradually weakens on both sides of the optical axis. The focal length of the second reflecting unit 3 can be set to a relatively small focal length at the place facing the energy, and the focal length can be set to a larger focal length at the places with weak energy on both sides, so as to ensure that the brightness is approximately equal in the final light emitting direction.

[0049] Example 3

[0050] The difference from Example 1 is that a diffusion pattern is provided in the light-emitting direction of the reflective optical system for achieving uniform lighting, that is, the diffusion pattern is located outside the reflective optical system.

[0051] Example 4

[0052] As Figures 6 to 8 shown, the difference from Example 1 is that in this example, the reflection unit further includes a third reflection unit 4 and a fourth reflection unit 5. The third reflection unit 4 and the first reflection unit 2 are symmetrically distributed left and right. The third reflection unit 4 and the first reflection unit 2 have the same focus in the vertical plane and are intersectingly arranged; the fourth reflection unit 5 and the second reflection unit 3 are symmetrically distributed left and right, and the fourth reflection unit 5 and the second reflection unit 3 have the same focal length in the horizontal plane, and the focal point positions of each are arranged symmetrically along the optical axis; the light source 1 is located above the intersection of the third reflection unit 4 and the first reflection unit 2. The third reflection unit 4 and the first reflection unit 2 are arranged back to back, and the fourth reflection unit 5 and the second reflection unit 3 are arranged opposite to each other.

[0053] The light rays emitted by the light source 1 are reflected and collimated into parallel light or approximately parallel light by the first reflection unit 2 and the third reflection unit 4 respectively, and then the light rays reach the second reflection unit 3 and the fourth reflection unit 5 respectively. After the energy is made uniform by the second reflection unit 3 and the fourth reflection unit 5, the light rays with uniform lighting are emitted.

[0054] The reflecting surface of the fourth reflection unit 5 is a smooth surface structure.

[0055] Example 5

[0056] The difference from Example 3 is that the fourth reflection unit 5 is composed of multiple curved surfaces 7 with the same focus and different focal lengths. The multiple curved surfaces 7 are connected by straight line segments, and the multiple curved surfaces 7 form a stepped structure.

[0057] In summary, the structure of the present utility model is simple and reasonable in design. The first reflection unit 2 is a parabolic cylindrical reflection unit. On the one hand, it can effectively collect the light rays emitted by the light source 1 and improve the effective utilization of the light rays. On the other hand, it can collimate these light rays into parallel light or approximately parallel light in the vertical plane; the second reflection unit 3 is a parabolic cylindrical reflection unit, which can improve the uniformity of the energy distribution, thereby achieving uniform lighting.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A reflective optical system that achieves uniform lighting, characterized in that: having one or several reflection units, the reflection units comprising: a light source (1), a first reflection unit (2) which collimates the light emitted by the light source (1) into parallel light or approximately parallel light in a vertical plane; a second reflection unit (3) which collimates the light output by the first reflection unit (2) into parallel light or approximately parallel light in a horizontal plane; the first reflection unit (2) is a parabolic cylinder reflection unit, the second reflection unit (3) is a parabolic cylinder reflection unit, and the light source (1) is arranged to coincide with the focus a of the first reflection unit (2).

2. The reflective optical system for achieving uniform lighting according to claim 1, wherein: The focus b of the second reflection unit (3) is located outside the focus a of the first reflection unit (2), and the distance L between the focus b and the focus a is 2f, where f is the focal length of the first reflection unit (2).

3. The reflective optical system for achieving uniform lighting according to claim 2, wherein: The reflection unit further comprises a third reflection unit (4) and a fourth reflection unit (5), the third reflection unit (4) and the first reflection unit (2) are symmetrically distributed left and right, the third reflection unit (4) and the first reflection unit (2) have the same focus in a vertical plane and are arranged intersectingly; the fourth reflection unit (5) and the second reflection unit (3) are symmetrically distributed left and right, and the fourth reflection unit (5) and the second reflection unit (3) have the same focal length in a horizontal plane, and the positions of their respective foci are arranged symmetrically along the optical axis; the light source (1) is located above the intersection of the third reflection unit (4) and the first reflection unit (2).

4. The reflective optical system for achieving uniform lighting according to claim 1, wherein: The reflecting surface of the second reflection unit (3) is a smooth surface structure or a pattern structure.

5. The reflective optical system for achieving uniform lighting according to claim 4, wherein: The second reflection unit (3) is composed of multiple curved surfaces (7) with the same focus and different focal lengths, and the multiple curved surfaces form a stepped structure.

6. The reflective optical system for achieving uniform lighting according to claim 3, wherein: The reflecting surface of the fourth reflection unit (5) is a smooth surface structure or a pattern structure.

7. The reflective optical system for achieving uniform lighting according to claim 6, wherein: The fourth reflection unit (5) is composed of multiple curved surfaces (7) with the same focus and different focal lengths, and the multiple curved surfaces form a stepped structure.

8. The reflective optical system for achieving uniform lighting according to claim 1, wherein: It further comprises a diffusing pattern, and the diffusing pattern is located in the light-emitting direction of the reflective optical system and outside the reflective optical system.

9. A vehicle lamp, characterized in that: The vehicle lamp comprises a reflective optical system for achieving uniform lighting according to any one of claims 1 to 8.

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