LIGHT GUIDE FOR A LIGHTING DEVICE OF A MOTOR VEHICLE, LIGHTING DEVICE AND MOTOR VEHICLE

Abstract

The present application relates to a collimator, the collimator including a light incident surface configured to allow a light ray from a light source to enter the collimator through the light incident surface and a light emitting surface configured to emit a light ray that enters the collimator through the light incident surface and is collimated by the collimator. The collimator also includes a light distribution portion. The present application further relates to a lighting device and a motor vehicle.

Claims

1. A collimator, comprising: a light incident surface configured to allow a light ray from a light source to enter the collimator through the light incident surface; a light emitting surface configured to emit a light ray that enters the collimator through the light incident surface and is collimated by the collimator; and a light distribution portion.

2. The collimator according to claim 1, wherein the light distribution portion includes a first reflecting surface and a second reflecting surface, wherein the first reflecting surface is configured to reflect a light ray passing through the light incident surface into the collimator to the second reflecting surface.

3. The collimator according to claim 2, wherein the first reflecting surface is a fully reflecting surface with a stepped structure.

4. The collimator according to claim 2, wherein the second reflecting surface includes light modulation regions, the light modulation regions being configured to redistribute the emitting angle of a light ray entering the light modulation region.

5. The collimator according to claim 4, wherein the light modulation regions include a pillow-shaped optical surface with an angle of inclination relative to the main plane of the second reflecting surface.

6. The collimator according to claim 4, wherein the light emitting surface includes different light emitting regions, which respectively emit light rays from different light modulation regions.

7. The collimator according to claim 4, further comprising a first side and a second side, the first side being provided with a first auxiliary reflecting surface and a second auxiliary reflecting surface, wherein the first auxiliary reflecting surface and the second auxiliary reflecting surface are respectively configured to receive and reflect light rays from different light modulation regions.

8. The collimator according to claim 1, wherein the light incident surface has the shape of an arc.

9. A lighting device, comprising a collimator, with the collimator including: a light incident surface configured to allow a light ray from a light source to enter the collimator through the light incident surface; a light emitting surface configured to emit a light ray that enters the collimator through the light incident surface and is collimated by the collimator; and a light distribution portion.

10. A motor vehicle, comprising a lighting device, with the lighting device including a collimator that includes: a light incident surface configured to allow a light ray from a light source to enter the collimator through the light incident surface; a light emitting surface configured to emit a light ray that enters the collimator through the light incident surface and is collimated by the collimator; and a light distribution portion.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present application will be further described below in conjunction with the drawings, wherein

[0017] FIG. 1 is a front view of a collimator according to the present application;

[0018] FIG. 2 is a front view of a collimator according to the present application;

[0019] FIG. 3 is a schematic diagram of a light distribution structure according to the present application;

[0020] FIG. 4 is an optical path diagram of a collimator at the light distribution structure according to the present application;

[0021] FIG. 5 is optical path diagram I of a collimator according to the present application at the second reflecting surface;

[0022] FIG. 6 is optical path diagram I of a collimator according to the present application at the second reflecting surface; and

[0023] FIG. 7 is optical path diagram I of a collimator according to the present application at the second reflecting surface.

DETAILED DESCRIPTION OF THE INVENTION

[0024] Embodiments of the present application are exemplified below. As those skilled in the art should realize, the embodiments described may be modified in various ways without departing from the concept of the present application. Thus, the accompanying drawings and the description are in essence demonstrative and non-limiting. In the following text, identical reference symbols generally indicate functionally identical or similar elements.

[0025] It should be understood that while terms like first, second, third, etc. may be used in the present application to describe various items of information, such items of information should not be limited to these terms. These terms are only used to differentiate items of information of the same type. For example, without departing from the scope of the present application, a first item of information may also be called a second item of information, and, similarly, a second item of information may also be called a first item of information. Depending on the context, the word if as used herein may be interpreted as when . . . or at the time of . . . or in response to determination.

[0026] It should be noted that in the description of the present application, orientations or positional relationships indicated by terms such as longitudinal, transverse, upper, lower, front, rear, left, right, vertical, horizontal, top, bottom, inner, outer, etc., are usually based on the orientations or positional relationships shown in the drawings, are only intended for convenience of describing the present application and brevity of description, instead of indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be understood as a limitation of the scope of protection of the present application.

[0027] FIG. 1 and FIG. 2 are respectively a front view and a side view of the collimator 100 of the present application. The collimator 100 comprises a light incident surface 101, configured to allow a light ray from a light source to enter the collimator 100 through the light incident surface 101; a light emitting surface 102, configured to emit a light ray that enters the collimator 100 through the light incident surface 101 and is collimated by the collimator.

[0028] In order for the light emitting surface to produce a uniform lighting effect, it is necessary to ensure that the energy of the light ray at the light emitting surface is evenly distributed, and therefore the present application provides a light distribution portion 103 to redistribute light ray distribution. As shown in FIG. 2, the light distribution portion 103 is a stepped structure on the collimator 100.

[0029] In one example, the light distribution portion 103 comprises a first reflecting surface 1031 and a second reflecting surface 1032. Preferably, both the first reflecting surface 1031 and the second reflecting surface 1032 are fully reflecting surfaces. A light ray entering the collimator 100 via the light incident surface 101 is fully reflected twice at the first reflecting surface 1031 and the second reflecting surface 1032 to generate substantially parallel beams at the light emitting surface 102 and achieve a substantially uniform light distribution at the light emitting surface 102.

[0030] It is clear from FIG. 2 that the first reflecting surface 1031 is a fully reflecting surface with a stepped structure, which is configured to reflect a light ray entering the collimator 100 through the light incident surface 101 to the second reflecting surface 1032. The first reflecting surface 1031 receives all the light rays entering the collimator 100 via the light incident surface 101, and reflects the light rays to the second reflecting surface 1032. Redistribution and orientation are then achieved via the second reflecting surface 1032. FIG. 4 is an optical path diagram of a collimator according to the present application at the light distribution structure.

[0031] In one example, as shown in FIG. 3, the second reflecting surface 1032 more specifically comprises light modulation regions 1034 and 1035, which redistribute the emitting angle of a light ray entering the light modulation region. The light modulation regions 1034 and 1035 comprise pillow-shaped optical surfaces with different angles of inclination relative to the main plane of the second reflecting surface 1032. FIGS. 5-7 are corresponding optical path diagrams at the second reflecting surface. As shown in FIGS. 5-7, the light modulation regions 1034 and 1035 redistribute and collimate light rays reflected into the light modulation regions via the first reflecting surface 1031.

[0032] The light emitting surface 102 comprises different light emitting regions (not shown), which respectively emit light rays from different light modulation regions 1034 and 1035.

[0033] Specifically, as shown in FIGS. 5-6, with a middle region of the light incident surface of the collimator, a small-angle light ray, after being reflected by the first reflecting surface 1031 in this region, reaches the second fully reflecting surface 1032, and, after the light ray is modulated by the light modulation regions of the second reflecting surface 1032, its direction of emission changes from the region substantially facing the light incident surface to the region near the left side of the collimator, so that the brightness of the middle region of the light emitting surface that originally has the highest brightness is slightly reduced compared with the original brightness. As shown in FIG. 7, for both sides of the light incident surface of the collimator, a large-angle light ray, after being reflected by the first reflecting surface 1031 in this region, reaches the second fully reflecting surface 1032, and after being reflected by the second reflecting surface 1032, reaches the light emitting surface. The large-angle light ray, together with the light rays modulated as shown in FIG. 5 and FIG. 6, can ensure that the light emitting region on the left side of the collimator has substantially the same brightness as the middle region after modulation.

[0034] After modulation by the light modulation regions 1034 and 1035 of the second reflecting surface 1032, the left light emitting region, which originally has a lower brightness, now has more energy distribution, and the middle light output region, which originally has a higher brightness, now has a reduced energy distribution, so that the light emitting surface 102 produces a uniform light output effect.

[0035] In the examples shown in FIG. 3 and FIGS. 5-7, the light modulation region comprises a pillow-shaped optical surface with two inclination angles. The setting mode, position and number of pillow-shaped optical surfaces in the light modulation regions 1034 and 1035 may be selected according to actual needs, specifically, according to the brightness of the light source, the collimator size, the size of the light emitting surface and other factors, which are not specifically restricted in the present application.

[0036] The collimator 100 further comprises a first side 104 and a second side 105. In one example, as shown in FIGS. 1-2, the length of the first side 104 is greater than that of the second side 105. When the sides have different lengths, the light homogenization effect produced by the design of the present application is more significant.

[0037] In one example, as shown in FIGS. 1-2, the first side 104 is provided with a first auxiliary reflecting surface 1041 and a second auxiliary reflecting surface 1042, wherein the first auxiliary reflecting surface 1041 and the second auxiliary reflecting surface 1042 are respectively configured to receive and reflect light rays from different light modulation regions. Auxiliary reflecting surfaces may be set to adjust the light emission angles of light rays, further ensuring nearly parallel emission of light rays. An auxiliary reflecting surface does not affect the energy distribution of light rays adjusted by the light distribution portion 103.

[0038] According to an example of the present application, the first side 104 and the second side 105 are preferably fully reflective surfaces, which can have substantially planar profiles.

[0039] In one example, the light incident surface 101 has the shape of an arc. The arc is preferably an arc recessed into the interior of the collimator 100. Compared with the light incident surface of a traditional collimator, the arc-shaped light incident surface 101 is more conducive to uniform output light distribution.

[0040] In addition, as shown in FIG. 1 and FIG. 2, the light emitting surface 102 has a dentate structure, which enables the light pattern to meet the regulatory requirements on lighting.

[0041] In a preferred example, the collimator 100 is integrally formed, preferably manufactured integrally by molding transparent plastic materials, such as PMMA or polycarbonate, to simplify the manufacturing process and reduce costs.

[0042] In an optional example, the light source 106 is preferably a light-emitting diode.

[0043] A collimator according to the present application is applicable to the lighting and signal indicating devices of motor vehicles, such as tail lights and signal lights.

[0044] A collimator of the present application has a uniform lighting effect as a whole and can ensure a uniform lighting effect even when the light emitting surface has a large width to enable saving of the space occupied by the collimator, which allows the lamp to have a more compact structure.

[0045] The present application further provides a lighting device comprising the collimator 100.

[0046] In addition, the present application further provides a motor vehicle, comprising the lighting device described above.

[0047] The lighting device or motor vehicle according to the present application at least has the beneficial effects brought by the collimator 100.

[0048] For those skilled in the art, it is clear that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Thus, regardless of which viewpoint is taken, the embodiments should be regarded as being demonstrative and non-limiting; the scope of the present application is defined by the attached claims and not by the above description, hence it is intended that all changes falling within the meaning and scope of equivalent key elements of the claims be included in the present application. Any reference symbols in the claims shall not be construed as limiting the claims concerned.