Light-emitting device and motor vehicle

Abstract

The utility model provides a light-emitting device (100), comprising: a light source assembly (10) configured to emit light; the light guide (20) comprises a first section (21), a second section (22) and a third section (23) which are connected in sequence, the first section is provided with a light incident surface (21a), the light incident surface is configured to receive the light rays emitted by the light source assembly, the third section is provided with a light emergent surface (23a), the light emergent surface is configured to emit the light rays received by the light incident surface, and the light emergent surface is configured to emit the light rays received by the light emergent surface. An accommodating groove (24) is defined by the first section, the second section and the third section; the reflector (30) comprises a first end (31), a second end (32) and a reflecting surface (33), the first end (31) and the second end (32) are oppositely arranged, the reflecting surface (33) is connected between the first end and the second end, the first end is arranged in the containing groove, and the reflecting surface is configured to reflect the light; and a lens (40) configured to emit the light to the outside of the light emitting device.

Description

Technical Field

[0001] The present application relates to the field of lighting technology, and more particularly, to a lighting device and a motor vehicle. Background Art

[0002] In the field of lighting technology, various lighting or signaling devices are known for providing light for lighting or signaling. For example, headlights are used in motor vehicles to provide lighting or signaling functions to ensure safe driving or to provide decorative functions.

[0003] Light-emitting devices for motor vehicles generally need not only to meet target optical requirements but also to be arranged in the motor vehicle in a more compact manner to save installation space in the motor vehicle and avoid conflicts with other components.

[0004] Therefore, it is currently an urgent need to propose a new light-emitting device that can meet optical requirements and save space. Utility Model Content

[0005] One purpose of the present application is to overcome at least one of the problems and drawbacks in the prior art.

[0006] A first aspect of the present application provides a light emitting device, comprising:

[0007] a light source assembly configured to emit light;

[0008] The light guide includes a first section, a second section, and a third section connected in sequence, wherein the first section has a light incident surface configured to receive the light emitted by the light source assembly, and the third section has a light exit surface configured to emit the light received by the light incident surface, wherein the first section, the second section, and the third section form a receiving groove;

[0009] a reflector comprising a first end and a second end opposite to each other, and a reflecting surface connected between the first end and the second end, wherein the first end is disposed in the receiving groove, and the reflecting surface is configured to reflect the light; and

[0010] The lens is configured to emit the light to the outside of the light emitting device.

[0011] In some embodiments, a semi-transmissive and semi-reflective layer is provided on the lens, and the semi-transmissive and semi-reflective layer is configured to emit part of the light to the outside of the light-emitting device and reflect part of the light to the reflective surface;

[0012] Part of the light is reflected multiple times between the reflective surface and the semi-transmissive and semi-reflective layer and then emitted from the lens;

[0013] The pattern after the light is emitted presents a 3D effect.

[0014] In some embodiments, the light guide is U-shaped along the length direction, the first section and the third section are respectively extended along the height direction, the second section is extended along the main light emitting direction, and the main light emitting direction, the length direction and the height direction are orthogonal to each other;

[0015] The first section is located on one side of the reflector along the main light emitting direction, the third section is located on the other side of the reflector along the main light emitting direction, and the second section is located on one side of the reflector along the height direction.

[0016] In some embodiments, the first end of the reflector has a first protrusion and a second protrusion, the first protrusion is in close contact with the first section, and the second protrusion is in close contact with the third section, so that the reflector is tightly engaged in the receiving groove of the light guide.

[0017] In some embodiments, there is a constant first distance between the third segment and the reflective surface;

[0018] There is a constant second distance between the third section and the lens.

[0019] In some embodiments, the light source assembly includes a circuit board arranged along the length direction and a plurality of light sources arranged at intervals on the circuit board;

[0020] The light source is an RGB light source;

[0021] An extension distance of the light guide between the light incident surface and the light emitting surface of the light guide is greater than a distance between two adjacent light sources.

[0022] In some embodiments, the light guide has a total internal reflection surface, and the light is transmitted from the light incident surface to the light emitting surface within the light guide by total internal reflection.

[0023] In some embodiments, the reflective surface is located on the outer surface of the reflector, and the semi-transmissive and semi-reflective layer is disposed on the inner surface of the lens.

[0024] In some embodiments, the third section is formed with a pattern, and the light emits a 3D effect of the pattern;

[0025] The lighting device is used as an interior light of a motor vehicle.

[0026] A second aspect of the present application provides a motor vehicle, which includes the lighting device provided in the first aspect and the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A partial structural schematic diagram of a motor vehicle provided in an embodiment of the present application is shown;

[0028] Figure 2 A top view of a light-emitting device provided in an embodiment of the present application;

[0029] Figure 3 for Figure 2 An exploded view of the light emitting device shown;

[0030] Figure 4 for Figure 2 A1-A1 cross-sectional view of the light emitting device shown;

[0031] Figure 5 for Figure 2 A2-A2 cross-sectional view of the light emitting device shown;

[0032] Figure 6 Shown Figure 2 The light emitting effect diagram of the light emitting device shown. DETAILED DESCRIPTION

[0033] The following is a detailed description of the embodiments of the present application in conjunction with the accompanying drawings. It should be understood that the embodiments of the present application are primarily intended to illustrate possible implementations of the technical solution of the present application and should not be construed as limiting the technical solution of the present application. In this specification, identical or similar components are indicated by identical or similar reference numerals.

[0034] Figure 1 A partial structural diagram of a motor vehicle 200 provided in an embodiment of the present application is shown; Figure 2 A top view of the light emitting device 100 provided in an embodiment of the present application; Figure 3 for Figure 2 An exploded view of the light emitting device 100 is shown; Figure 4 for Figure 2 A1-A1 cross-sectional view of the light emitting device 100 shown; Figure 5 for Figure 2 A2-A2 cross-sectional view of the light emitting device 100 shown; Figure 6 Shown Figure 2 The light emitting effect diagram of the light emitting device 100 is shown.

[0035] like Figure 1-5As shown, an embodiment of the present application provides a lighting device 100, which can be used as an interior light of a motor vehicle 200 and installed near the instrument panel inside the motor vehicle 200. In other embodiments, the lighting device 100 can also be used as a light with other functions of the motor vehicle 200, for example, the lighting device 100 can be used as an exterior light, a signal light, or an interior light at other locations inside the motor vehicle 200. The present application does not specifically limit the function of the lighting device 100.

[0036] Specifically, the light-emitting device 100 includes a light source assembly 10, a light guide 20, a reflector 30, and a lens 40. The light source assembly 10 is configured to emit light. The light guide 20 includes a first section 21, a second section 22, and a third section 23 connected in sequence. The first section has a light incident surface 21a, which is configured to receive light emitted by the light source assembly 10. The third section 23 has a light exit surface 23a, which is configured to emit light received by the light incident surface 21a. The first section 21, the second section 22, and the third section 23 form a receiving groove 24. The reflector 30 includes a first end 31 and a second end 32 disposed opposite to each other. The reflector 30 also includes a reflective surface 33 connected between the first end 31 and the second end 32. The first end 31 is disposed in the receiving groove 24, and the reflective surface 33 is configured to reflect light. The lens 40 is configured to emit light L to the outside of the light-emitting device 100 to form a target optical effect.

[0037] In this embodiment, by configuring the light guide 20 to include a first section 21, a second section 22, and a third section 23 connected in sequence, the light mixing distance within the light guide can be significantly increased, thereby improving the uniformity of the emitted light. Furthermore, by configuring the first section 21, the second section 22, and the third section 23 to form a receiving groove 24, with the first end 31 of the reflector 30 disposed within the receiving groove 24, the overall space utilization of the light-emitting device 100 can be improved, making the overall structure of the light-emitting device 100 more compact.

[0038] like Figure 3-4 As shown, the light source assembly 10 includes a circuit board 11 arranged along the length direction Y and a plurality of light sources 12 spaced apart on the circuit board 11. The light source 12 can be an RGB light source to provide a color pattern when the light-emitting device 100 is used as an interior light. Generally speaking, the extension distance of the light guide 20 between the light incident surface 21a and the light emitting surface 23a of the light guide 20 is greater than the distance between two adjacent light sources 12, thereby ensuring that the brightness and color of the light have better mixing uniformity, thereby improving the uniformity of the emitted light and meeting the optical requirements of the target. It is worth noting that the light guide 20 has a total internal reflection surface, and the light is transmitted from the light incident surface 21a to the light emitting surface 23a by total reflection within the light guide 20.

[0039] In this embodiment, a semi-transparent and semi-reflective layer 41 is provided on the lens 40. The semi-transparent and semi-reflective layer 41 is configured to emit part of the light emitted through the light-emitting surface 23a to the outside of the light-emitting device 100 and reflect part of the light to the reflective surface 33. Part of the light is reflected multiple times between the reflective surface 33 and the semi-transparent and semi-reflective layer 41 before being emitted from the lens 40. Since part of the light is reflected multiple times between the reflective surface 33 and the semi-transparent and semi-reflective layer 41 before being emitted from the lens 40, the pattern after the light L is emitted presents a 3D effect, as detailed in FIG. Figure 6 The reflective surface 33 can be located on the outer surface of the reflector 30, for example, by aluminum plating on the outer surface of the reflector 30. The translucent layer 41 can be provided on the inner surface of the lens 40, for example, by aluminum plating or coating. This not only ensures that light is reflected multiple times between the reflective surface 33 and the translucent layer 41, but also improves the light extraction efficiency.

[0040] In some embodiments, as Figure 2-3 As shown, the third section 23 of the light guide 20 may be formed with a pattern, for example, the third section 23 includes a plurality of protrusions 231 spaced apart along the length direction Y, and the plurality of protrusions 231 are assembled into the pattern. Figure 6 As shown, the light L emits a 3D effect of the pattern. Figure 5 As shown, in order to achieve a uniform 3D effect, a constant first distance D1 is provided between the third segment 23 and the reflective surface 33. Correspondingly, a constant second distance D2 is provided between the third segment 23 and the lens 40.

[0041] like Figure 3-5 As shown, the light guide 20 is generally U-shaped along the length direction Y. In the cross section between the main light emitting direction X and the height direction Z, the light guide 20 is U-shaped. The first section 21 and the third section 23 extend along the height direction Z, respectively, and the second section 22 extends along the main light emitting direction X. The main light emitting direction X, the length direction Y, and the height direction Z are orthogonal to each other. The first section 21 is located on one side of the reflector 30 along the main light emitting direction X, the third section 23 is located on the other side of the reflector 30 along the main light emitting direction X, and the second section 22 is located on one side of the reflector 30 along the height direction Z. That is, the first end 31 of the reflector 30 is located between the first section 21 and the third section 23, and is also located between the second end 32 of the second section 22.

[0042] In some embodiments, the first end 31 of the reflector 30 has a first protrusion 31a and a second protrusion 31b. The first protrusion 31a abuts the first section 21 of the light guide 20, and the second protrusion 31b abuts the third section 23 of the light guide 20, so that the reflector 30 is tightly snapped into the receiving groove 24 of the light guide 20. The light source 12 is soldered to the circuit board 11, which can be riveted to the light guide 20 via a snap-fit ​​structure. The reflector 30 can also be snapped onto the light guide 20. The light source assembly 10, light guide 20, and reflector 30 form an integrated subassembly, which can simplify subsequent assembly processes. The light-emitting device 100 can also include a housing 50. The lens 40 is mounted on the housing 50 via a mounting structure. The subassembly is clamped between the housing 50 and the lens 40. Specifically, the rear edge of the first section 21 of the light guide 20 abuts the housing 50, and the front edge of the third section 23 of the light guide 20 abuts the lens 40. The lens 40 generally includes a white piece 45 and a black piece 46 located at the end. The white piece 45 is used to achieve corresponding optical requirements, and the black piece 46 is used to cover up ugliness.

[0043] An embodiment of the present application further provides a motor vehicle 200 , which includes the lighting device 100 described in any one of the above embodiments.

[0044] Although the present application is described in conjunction with the accompanying drawings, the embodiments disclosed in the drawings are intended to illustrate preferred embodiments of the present application and are not to be construed as limiting the present application. The dimensions and proportions in the drawings are merely illustrative and are not to be construed as limiting the present application.

[0045] Although some embodiments of the overall concept of the present application have been shown and described, those skilled in the art will understand that the present application may include more other equivalent embodiments without departing from the overall inventive concept of the present application, and the scope of protection of the present application is defined by the claims.

Claims

1. A light emitting device (100), characterized in that: include: a light source assembly (10) configured to emit light; A light guide (20) comprising a first section (21), a second section (22), and a third section (23) connected in sequence, wherein the first section has a light incident surface (21a) configured to receive the light emitted by the light source assembly, and the third section has a light emitting surface (23a) configured to emit the light received by the light incident surface, wherein the first section, the second section, and the third section form a receiving groove (24); a reflector (30) comprising a first end (31) and a second end (32) disposed opposite to each other, and a reflecting surface (33) connected between the first end and the second end, wherein the first end is disposed in the receiving groove, and the reflecting surface is configured to reflect the light; and The lens (40) is configured to emit the light to the outside of the light emitting device.

2. The light emitting device according to claim 1, wherein A semi-transmissive and semi-reflective layer (41) is provided on the lens, and the semi-transmissive and semi-reflective layer is configured to emit part of the light to the outside of the light-emitting device and reflect part of the light to the reflective surface; Part of the light is reflected multiple times between the reflective surface and the semi-transmissive and semi-reflective layer and then emitted from the lens; The pattern after the light is emitted presents a 3D effect.

3. The light emitting device according to claim 1, wherein The light guide is U-shaped along the length direction (Y), the first section and the third section are respectively extended along the height direction (Z), and the second section is extended along the main light emitting direction (X), and the main light emitting direction, the length direction and the height direction are orthogonal to each other; The first section is located on one side of the reflector along the main light emitting direction, the third section is located on the other side of the reflector along the main light emitting direction, and the second section is located on one side of the reflector along the height direction. The light emitting device according to claim 1 , wherein: The first end of the reflector has a first protrusion (31a) and a second protrusion (31b), the first protrusion is in close contact with the first section, and the second protrusion is in close contact with the third section, so that the reflector is tightly clamped in the accommodating groove of the light guide.

5. The light emitting device according to any one of claims 1 to 4, wherein There is a constant first distance (D1) between the third section and the reflecting surface; There is a constant second distance (D2) between the third section and the lens.

6. The light emitting device according to any one of claims 1 to 4, wherein: The light source assembly comprises a circuit board (11) arranged along a length direction (Y) and a plurality of light sources (12) arranged at intervals on the circuit board; The light source is an RGB light source; An extension distance of the light guide between the light incident surface and the light emitting surface of the light guide is greater than a distance between two adjacent light sources.

7. The light emitting device according to any one of claims 1 to 4, wherein: The light guide has a total internal reflection surface, and the light is transmitted from the light incident surface to the light emitting surface through total internal reflection in the light guide.

8. The light emitting device according to claim 2, wherein: The reflecting surface is located on the outer surface of the reflector, and the semi-transmissive and semi-reflective layer is arranged on the inner surface of the lens.

9. The light emitting device according to any one of claims 1 to 4, wherein: The third section is formed with a pattern, and the light emits a 3D effect of the pattern; The lighting device is used as an interior light of a motor vehicle.

10. A motor vehicle, characterized in that: The motor vehicle comprises a lighting device according to any one of claims 1-9.

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