Light-emitting structure

Abstract

The light-emitting structure comprises a multi-color light source and a light guide, and the light guide sequentially comprises a light mixing section and a body section in the length direction; the light mixing section is arranged at one end close to the multi-color light source, the light mixing section is provided with a reducing part which shrinks inwards in the axis direction, and light guide teeth are arranged on the body section. The light mixing distance needed by the multi-color light source is reduced by changing the light guide shape of the light mixing section, more space is avoided for the atmosphere lamp design, more irradiation distances can be designed for the atmosphere lamp, and meanwhile the light mixing effect is better.

Description

Technical Field

[0001] The invention relates to the field of light-guiding and luminescent light, and in particular to a light-emitting structure. Background Art

[0002] Currently, RGB LED is mostly used in car atmosphere lights to experiment with lighting effects of different colors. However, RGBLED has three chips, namely red light chip, green light chip and blue light chip. The lighting effects of different colors are achieved by mixing the light of the three chips.

[0003] Light guides are the main optical components in automotive ambient lights. In the design process of ordinary light guide structures, in order to ensure the light mixing effect, it is generally necessary to reserve a distance of about 50mm on the LED light entrance side of the ordinary light guide for RGB LED light mixing. Figure 1 As shown, an RGB LED lamp 91 is arranged on the light incident side of an ordinary light guide 92, an end of the ordinary light guide 92 close to the RGB LED lamp is a light mixing distance segment 921, and an end of the ordinary light guide 92 far from the RGB LED lamp is a light guide tooth segment 922. The light mixing distance segment is arranged so that the red, green and blue lights are fully mixed without color deviation. However, currently, the space in the automotive ambient light is limited, and it is often difficult to reserve a light mixing distance of about 50 mm due to space constraints, resulting in color dispersion in the overall illumination effect, affecting the illumination effect of the ambient light.

[0004] Therefore, it is necessary to provide a new technical solution to the above-mentioned problems. Summary of the invention

[0005] In order to solve at least one of the technical problems existing in the prior art, the present invention provides a light emitting structure with a shortened light mixing distance and a better light mixing effect. The specific technical solution is as follows:

[0006] The present invention discloses a light emitting structure, which comprises a multi-color light source and a light guide, wherein the light guide comprises a light mixing section and a main body section in sequence along the length direction;

[0007] The light mixing section is arranged at one end close to the multi-color light source, the light mixing section is provided with a reduced diameter portion contracting inwardly along the axial direction, and the body section is provided with light guide teeth.

[0008] As a preferred solution of the light-emitting structure of the present invention, the light-mixing section includes a diameter-reducing portion and a light-mixing main body portion connected to the diameter-reducing portion, and both ends of the diameter-reducing portion are respectively connected to the light-mixing main body portion.

[0009] As a preferred solution of the light-emitting structure of the present invention, the surface of the reduced diameter portion is an arc curved inward along the axial direction.

[0010] As a preferred solution of the light-emitting structure described in the present invention, the mixing section includes a reduced diameter portion and a mixing body portion connected to the reduced diameter portion, and the angle formed by the tangent of the starting end of the arc of the reduced diameter portion and the axial extension line of the surface of the mixing body portion is γ, and the range of the γ angle is (13±10)°.

[0011] As a preferred solution of the light-emitting structure of the present invention, the surface of the light-mixing section is a step-shaped curve along the axial direction, and the step-shaped curve includes oblique lines and connecting lines connected in sequence.

[0012] As a preferred solution of the light-emitting structure described in the present invention, the mixing section includes a reduced diameter portion and a mixing body portion connected to the reduced diameter portion, the longest perpendicular segment between the surface axial extension line of the mixing body portion and the step curve is h, the length of h is less than 1 / 4 times the diameter of the mixing body portion, and the angle δ formed by the oblique line and the surface axial extension line of the mixing body portion is in the range of (13±10)°.

[0013] As a preferred solution of the light-emitting structure of the present invention, the connecting line is parallel to the axial extension line of the surface of the light-mixing body; and / or

[0014] The diameter of the light-mixing body portion is consistent with the diameter of the body segment.

[0015] As a preferred solution of the light-emitting structure of the present invention, the multicolor light source is a light source including at least two colors.

[0016] As a preferred solution of the light-emitting structure of the present invention, the light guide is a rod-shaped light guide or a columnar light guide.

[0017] As a preferred solution of the light-emitting structure of the present invention, the light-mixing segment and the main body segment are integrally connected.

[0018] As a preferred solution of the light-emitting structure of the present invention, the light-mixing body portion and the diameter-reducing portion are integrally connected.

[0019] Compared with the prior art, the technical solution of the present invention has at least one or more of the following beneficial effects:

[0020] The light-emitting structure of this patent reduces the light mixing distance required for a multi-color light source by changing the shape of the light guide in the light mixing section; at the same time, this patent optimizes the structure of the light mixing section to achieve a better light mixing effect.

[0021] The reduced diameter portion of the light mixing section is set. Compared with the light mixing distance required by the ordinary structure, the light mixing section of the patented technical solution is shortened by 40%, thereby greatly reducing the light mixing distance. Reducing the light mixing distance can avoid more space for the design of the atmosphere light, so that more irradiation distance can be designed for the atmosphere light.

[0022] An inwardly curved arc is set on the light-inlet side of the light guide to change the originally uniform light guide shape into an arc-shaped transition section with a certain curvature. By setting the arc-shaped transition section, the number of reflections of light inside the light guide can be increased so that the RGB light can be fully mixed.

[0023] Setting a step curve can also increase the number of light reflections to optimize the light mixing effect.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the main structure of a common light guide structure described in the prior art;

[0027] Figure 2 It is a schematic diagram of the main structure of an embodiment of the light-emitting structure described in this patent;

[0028] Figure 3 It is a schematic diagram of the reflection of light incident into the light guide of a common light guide structure and the light-emitting structure of the present patent;

[0029] Figure 4 It is a partial structural schematic diagram of the light-emitting structure described in this patent;

[0030] Figure 5 yes Figure 4 A partial structural schematic diagram of the specific embodiment;

[0031] Figure 6 It is a schematic diagram of the radial cross-section structure of the light mixing effect of the common light guide structure and the light emitting structure of the present patent;

[0032] Figure 7 It is a schematic diagram of the main structure of another embodiment of the light-emitting structure described in this patent.

[0033] Among them, 1-multicolor light source, 2-light guide, 21-light mixing section, 211-reduced diameter section, 212-light mixing body section, 213-oblique line, 214-connecting line, 22-body section, 23-light guide teeth. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", "end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In the description of the present invention, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0036] In the description of the present invention, unless otherwise clearly specified and limited, the terms "provided with", "equipped with", "connected", "installed with", "set", "opened", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention.

[0038] Please refer to Figure 2-7 .like Figure 2-7 As shown, the present invention provides a light emitting structure, comprising a multicolor light source 1 and a light guide 2, wherein the light guide comprises a light mixing section 21 and a main body section 22 in sequence along the length direction;

[0039] The light mixing section 21 is arranged at one end close to the multi-color light source 1 . The light mixing section 21 is provided with a reduced diameter portion 211 contracting inwardly along the axial direction. The main body section 22 is provided with a light guide tooth 23 .

[0040] In the example, the light guide 2 close to the multi-color light source 1 is a light incident plane.

[0041] The light-emitting structure of this patent reduces the light mixing distance required for a multi-color light source by changing the shape of the light guide in the light mixing section; at the same time, this patent optimizes the structure of the light mixing section to achieve a better light mixing effect.

[0042] The reduced diameter portion of the light mixing section is set. Compared with the light mixing distance required by the ordinary structure, the light mixing section of the patented technical solution is shortened by 40%, thereby greatly reducing the light mixing distance. Reducing the light mixing distance can avoid more space for the design of the atmosphere light, so that more irradiation distance can be designed for the atmosphere light.

[0043] Preferably, the multicolor light source 1 is a light source including at least two colors. In the example, the multicolor light source is an RGB light source, which can be a light source of a red chip, a green chip and a blue chip, or can be an RGB light source in other forms. Of course, the multicolor light source can also be a combination of other colors, as long as it is at least two colors. In the example, the RGB light source is an RGB LED.

[0044] Preferably, the light mixing section 21 is integrally connected with the main body section 22. In the example, the light guide 2 is a rod-shaped light guide or a columnar light guide.

[0045] In a preferred embodiment, the reduced diameter portion 211 is disposed in the middle region along the axial direction of the light mixing section 21. Specifically, both ends of the reduced diameter portion 211 are connected to the light mixing body portion 212 respectively.

[0046] Preferably, Figure 2 and Figure 7 As shown, the light mixing body portion 212 is integrally connected with the diameter-reducing portion 211 .

[0047] Preferably, Figure 2 and Figure 7 As shown, the diameter of the light-mixing body portion 212 is consistent with the diameter of the body segment 22 .

[0048] In a preferred embodiment, Figure 2-7 As shown, the light mixing section 21 includes a reduced diameter portion 211 and a light mixing body portion 212 connected to the reduced diameter portion 211, and at least one end of the reduced diameter portion 211 away from the body section 22 is connected to the light mixing body portion 212. Figure 2 As shown, both ends of the reduced diameter portion 211 are connected to the light mixing body portion 212 . In the example, the diameter of the light mixing body portion 212 is consistent with the diameter of the body segment 22 .

[0049] A preferred embodiment, as Figure 2-6 As shown, the surface of the reduced diameter portion 211 is an arc curved inward along the axial direction. Preferably, the angle formed by the tangent line of the starting end of the arc of the reduced diameter portion 211 and the axial extension line of the surface of the light mixing body 212 is γ, and the range of the γ angle is (13±10)°. Specifically, as Figure 4As shown, the angle formed by the tangent of the starting end of the arc of the reduced diameter section and the axial extension line of the surface of the light mixing body 212 is defined as γ, and the incident light angle of the multi-color light source incident on the light guide light mixing section is defined as α. The incident light is refracted through the light incident plane, and the refraction angle is β. The refracted light irradiates the reduced diameter section of the light mixing section and is internally reflected at an angle θ with the normal line of the reduced diameter section plane. The preferred α angle range is (60±10)°, the β angle range is (35±10)°, the θ angle range is (42±10)°, and the γ angle range is (13±10)°. Figure 5 In the example, the light guide is made of PMMA (polymethyl methacrylate). For most LED lamps, the maximum incident angle α of the incident light is 60°. The refractive index of the PMMA light guide is 1.49, and the corresponding refraction angle is 35°. To ensure the light efficiency, it is necessary to ensure that the LED light can be fully reflected inside the light guide. The minimum angle θ of total reflection of light in the PMMA light guide is 42°. Therefore, it can be calculated that the γ angle = 180°-β-90°-θ = 180°-35°-90°-42° = 13°. At this time, the reduced diameter section can fully mix the light while maintaining the highest efficiency. The light mixing effect of the above embodiment, such as Figure 6 As shown, for RGB light sources, ordinary light guides have a mixing distance of 30mm. After mixing, the axial part of the light guide can mix white light, but there will still be red, green, and blue scattered monochromatic light along the circumference, and the mixing effect in the outer circumference is poor. After the light-emitting structure of this patent is provided with a reduced diameter section, the entire radial surface of the light guide body section will mix white light, and the overall mixing effect is good.

[0050] An inwardly curved arc is provided, and on the light-inlet side of the light guide, the originally uniform light guide shape is changed into an arc-shaped transition section with a certain curvature. By providing the arc-shaped transition section, the number of reflections of light inside the light guide can be increased so that the light can be fully mixed.

[0051] like Figure 3 As shown, a normal light guide has only about one reflection within the light mixing distance, and the light enters the light-emitting area with the light guide teeth. However, for a light guide with a light mixing section, the light on the incident side can be reflected about 5 times at the same distance. The number of reflections is greatly increased, so that the RGB light source can be fully mixed.

[0052] A preferred embodiment, as Figure 7 As shown, the surface of the light mixing section 21 is a step-shaped curve along the axis direction, and the step-shaped curve includes staggered oblique lines 213 and connecting lines 214. Setting the step-shaped curve can also increase the number of light reflections and thus optimize the light mixing effect.

[0053] Further preferably, the light mixing section 21 includes a reduced diameter portion 211 and a light mixing body portion 212 connected to the reduced diameter portion 211, the longest perpendicular segment between the surface axial extension line of the light mixing body portion 212 and the step curve is h, the length of h is less than 1 / 4 times the diameter of the light mixing body portion 212, and when the angle δ formed by the oblique line 213 and the surface axial extension line of the light mixing body portion 212 is in the range of (13±10)°, the light mixing effect is relatively high.

[0054] In this example, the connection line 214 is parallel to an axial extension line of the surface of the light-mixing body 212 .

[0055] It should be noted that, in the absence of conflict, all features in the above embodiments or embodiments described herein can be freely combined.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "yet another embodiment", "another embodiment", "other embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0057] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify and vary the above embodiments within the scope of the present invention.

Claims

1. A light emitting structure, characterized in that: It comprises a multicolor light source (1) and a light guide (2), wherein the light guide comprises a light mixing section (21) and a main body section (22) in sequence along the length direction; The light mixing section (21) is arranged at one end close to the multi-color light source (1), the light mixing section (21) is provided with a reduced diameter portion (211) contracting inwardly along the axial direction, and the main body section (22) is provided with a light guide tooth (23).

2. The light emitting structure according to claim 1, characterized in that: The light mixing section (21) comprises a reduced diameter portion (211) and a light mixing body portion (212) connected to the reduced diameter portion (211), and both ends of the reduced diameter portion (211) are respectively connected to the light mixing body portion (212).

3. The light emitting structure according to claim 1 or 2, characterized in that: The surface of the reduced diameter portion (211) is an arc curved inwards along the axial direction.

4. The light emitting structure according to claim 3, characterized in that: The light mixing section (21) comprises a reduced diameter portion (211) and a light mixing body portion (212) connected to the reduced diameter portion (211); an angle γ is formed between a tangent line at a starting end of an arc line of the reduced diameter portion (211) and an axial extension line of a surface of the light mixing body portion (212); and the range of the γ angle is (13±10)°.

5. The light emitting structure according to claim 1 or 2, characterized in that: The surface of the light mixing section (21) is a step-shaped curve along the axial direction, and the step-shaped curve includes staggered and connected oblique lines (213) and connecting lines (214).

6. The light emitting structure according to claim 5, characterized in that: The light mixing section (21) comprises a reduced diameter portion (211) and a light mixing body portion (212) connected to the reduced diameter portion (211); the longest perpendicular line segment between the axial extension line of the surface of the light mixing body portion (212) and the step-shaped curve is h, the length of h is less than 1 / 4 times the diameter of the light mixing body portion (212); and the angle δ formed by the oblique line (213) and the axial extension line of the surface of the light mixing body portion (212) is in the range of (13±10)°.

7. The light emitting structure according to claim 6, characterized in that: The connecting line (214) is parallel to an axial extension line of the surface of the light mixing body (212); and / or The diameter of the light-mixing body portion (212) is consistent with the diameter of the body segment (22).

8. The light emitting structure according to claim 1, characterized in that: A multicolor light source (1) is a light source comprising at least two colors.

9. The light emitting structure according to claim 1, characterized in that: The light guide (2) is a rod-shaped light guide or a column-shaped light guide.

10. The light emitting structure according to claim 2, characterized in that: The light mixing section (21) and the main body section (22) are integrally connected; and / or The light mixing body part (212) and the reduced diameter part (211) are integrally connected.

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