Light-emitting structure
By optimizing the light guide structure in automotive ambient lighting, and using a reduced diameter section and an arc transition section, the problem of light mixing under space constraints was solved, resulting in better light mixing and illumination effects.
Patent Information
- Application Number
- CN202520022938.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-01-06
AI Technical Summary
Due to space limitations, existing automotive ambient lighting systems often lack sufficient mixing distance, resulting in color dispersion and affecting illumination.
By incorporating an inwardly tapering section and an arc-shaped transition section into the light-mixing segment, the light guide structure is optimized, increasing the number of light reflections and shortening the light-mixing distance.
It improves the light mixing effect, reduces the light mixing distance, increases the design space for ambient lighting, and ensures better illumination.
Smart Images
Figure CN223869073U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of light-emitting light guides, and in particular to a light-emitting structure. Background Technology
[0002] Currently, most automotive ambient lights use RGB LEDs to experiment with different color lighting effects. However, RGB LEDs have three chips: a red chip, a green chip, and a blue chip. Different color lighting effects are achieved by mixing the light emitted by these three chips.
[0003] In automotive ambient lighting, light guides are the primary optical components. In the design of ordinary light guide structures, to ensure light mixing effects, a distance of approximately 50mm is typically reserved on the LED light-input side of the ordinary light guide for RGB LED light mixing. Figure 1 As shown, an RGB LED light 91 is set on the light-input side of a regular light guide 92. The end of the regular light guide 92 closer to the RGB LED light is the light mixing distance segment 921, and the end of the regular light guide 92 further away from the RGB LED light is the light guide tooth segment 922. Setting the light mixing distance segment ensures that the red, green and blue light are fully mixed so that there is no color deviation. However, the space in current automotive ambient lighting is limited, and it is often difficult to leave a light mixing distance of about 50mm due to space constraints, resulting in color dispersion in the overall illumination effect and affecting the illumination effect of the ambient light.
[0004] Therefore, it is necessary to provide a new technical solution to address the aforementioned problems. Utility Model Content
[0005] To at least address one of the technical problems existing in the prior art, this utility model provides a light-emitting structure that shortens the light-mixing distance and improves the light-mixing effect. The specific technical solution is as follows:
[0006] This utility model discloses a light-emitting structure, which includes a multicolor light source and a light guide, wherein the light guide includes a light mixing section and a body section in sequence along the length direction;
[0007] The light mixing section is located at one end close to the multicolor light source. The light mixing section has an inwardly tapering section along the axial direction, and the main body section is provided with light guide teeth.
[0008] As a preferred embodiment of the light-emitting structure described in this utility model, the light-mixing section includes a narrowed diameter section and a light-mixing body section connected to the narrowed diameter section, with the light-mixing body section connected to both ends of the narrowed diameter section.
[0009] As a preferred embodiment of the light-emitting structure described in this utility model, the surface of the reduced diameter portion is an inwardly curved arc along the axial direction.
[0010] As a preferred embodiment of the light-emitting structure described in this utility model, the light-mixing section includes a narrowed diameter section and a light-mixing body section connected to the narrowed diameter section. The angle formed by the tangent at the starting end of the arc of the narrowed diameter section and the axial extension line of the surface of the light-mixing body section is γ, and the range of the γ angle is (13±10)°.
[0011] As a preferred embodiment of the light-emitting structure described in this utility model, the surface of the light-mixing section is a stepped curve along the axial direction, and the stepped curve includes a series of connected oblique lines and connecting lines.
[0012] As a preferred embodiment of the light-emitting structure described in this utility model, the light-mixing section includes a narrowed diameter section and a light-mixing body section connected to the narrowed diameter section. The longest perpendicular line segment between the axial extension line of the surface of the light-mixing body section and the stepped curve is h. The length of h is less than 1 / 4 times the diameter of the light-mixing body section. The angle δ formed by the oblique line and the axial extension line of the surface of the light-mixing body section is in the range of (13±10)°.
[0013] As a preferred embodiment of the light-emitting structure described in this utility model, 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 is the same as the diameter of the body segment.
[0015] As a preferred embodiment of the light-emitting structure described in this utility model, the multicolor light source is a light source that includes at least two colors.
[0016] As a preferred embodiment of the light-emitting structure described in this utility model, the light guide is a rod-shaped light guide or a columnar light guide.
[0017] As a preferred embodiment of the light-emitting structure described in this utility model, the light-mixing segment and the main body segment are integrally connected.
[0018] As a preferred embodiment of the light-emitting structure described in this utility model, the light-mixing body and the diameter-reducing part are integrally connected.
[0019] Compared with the prior art, the technical solution of this utility model has at least one or more of the following beneficial effects:
[0020] This patented light-emitting structure reduces the mixing distance required for multi-color light sources by changing the shape of the light guide in the mixing section; at the same time, this patent optimizes the mixing section structure, resulting in better mixing effect.
[0021] By incorporating a reduced-diameter section in the light-mixing segment, this patented technology shortens the required light-mixing distance by 40% compared to conventional structures, thus significantly reducing the light-mixing distance. This reduced distance allows for more space in the ambient light design, enabling a longer illumination range.
[0022] By setting an inward-curving arc, the original uniform shape of the light guide is changed into an arc-shaped transition section with a certain curvature on the light-introducing side. By setting the arc-shaped transition section, the number of reflections of light inside the light guide can be increased, thereby enabling the RGB light to be fully mixed.
[0023] Setting a stepped curve can also increase the number of light reflections, thereby optimizing the light mixing effect.
[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0025] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0026] Figure 1 This is a schematic diagram of the front view of a common optical guide structure as described in the prior art;
[0027] Figure 2 This is a front view schematic diagram of one embodiment of the light-emitting structure described in this patent;
[0028] Figure 3 This is a schematic diagram showing the reflection of light incident into the light guide in a conventional light guide structure and the light-emitting structure of this patent;
[0029] Figure 4 This is a partial structural schematic diagram of the light-emitting structure described in this patent;
[0030] Figure 5 yes Figure 4 Partial structural diagrams of the specific embodiments described above;
[0031] Figure 6 This is a schematic diagram of the radial cross-section of the light mixing effect between a conventional light guide structure and the light-emitting structure of this patent.
[0032] Figure 7 This is a front view schematic diagram 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-diameter reduction section, 212-light mixing body section, 213-oblique line, 214-connecting line, 22-body section, 23-light guide tooth. Detailed Implementation
[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.
[0035] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," "end," "both ends," "one end," and "the other end," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply 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 construed as a limitation of this utility model. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0036] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "provided with," "equipped with," "connected," "installed," "sleeved," "opened," and "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0037] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
[0038] Please refer to Figure 2-7 .like Figure 2-7 As shown, this utility model provides a light-emitting structure, including a multicolor light source 1 and a light guide 2. The light guide includes a light mixing section 21 and a body section 22 along its length.
[0039] The light mixing section 21 is located at one end close to the multicolor light source 1. The light mixing section 21 has an inwardly tapering diameter section 211 along the axial direction, and the body section 22 is provided with light guide teeth 23.
[0040] In the example, light guide 2 is located near the incident light plane of multicolor light source 1.
[0041] This patented light-emitting structure reduces the mixing distance required for multi-color light sources by changing the shape of the light guide in the mixing section; at the same time, this patent optimizes the mixing section structure, resulting in better mixing effect.
[0042] By incorporating a reduced-diameter section in the light-mixing segment, this patented technology shortens the required light-mixing distance by 40% compared to conventional structures, thus significantly reducing the light-mixing distance. This reduced distance allows for more space in the ambient light design, enabling a longer illumination range.
[0043] Preferably, the multicolor light source 1 is a light source comprising at least two colors. In this example, the multicolor light source is an RGB light source, which can be a light source consisting of a red chip, a green chip, and a blue chip, or it can be other forms of RGB light source. Of course, the multicolor light source can also be a combination of other colors, as long as it contains at least two colors. In this example, the RGB light source is an RGB LED.
[0044] Preferably, the light mixing segment 21 and the main body segment 22 are integrally connected. 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 of the light mixing section 21 along the axial direction. Specifically, the two ends of the reduced diameter portion 211 are respectively connected to the light mixing body portion 212.
[0046] Preferred, such as Figure 2 and Figure 7 As shown, the light mixing body 212 and the diameter reduction part 211 are integrally connected.
[0047] Preferred, such as Figure 2 and Figure 7 As shown, the diameter of the light mixing body 212 is the same as the diameter of the body segment 22.
[0048] In a preferred embodiment, such as 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. 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. In the example, as... Figure 2 As shown, both ends of the reduced diameter portion 211 are connected to the light-mixing body portion 212. In this example, the diameter of the light-mixing body portion 212 is the same as the diameter of the body segment 22.
[0049] A preferred embodiment, such as Figure 2-6 As shown, the surface of the reduced diameter portion 211 is an inwardly curved arc along the axial direction. Preferably, the angle formed by the tangent at 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 portion 212 is γ, and the range of the γ angle is (13±10)°. Specifically, as shown... Figure 4As shown, the angle formed by the tangent at the starting end of the reduced-diameter section arc and the axial extension line of the surface of the light-mixing body 212 is defined as γ. The angle of the incident light ray from the multi-color light source into the light-mixing section is defined as α. The incident light ray is refracted through the incident plane at an angle of β. The refracted light ray illuminates the reduced-diameter section of the light-mixing section and undergoes internal reflection with the normal to the plane of the reduced-diameter section at an angle θ. The preferred ranges for the angle α are (60±10)°, the angle β are (35±10)°, the angle θ are (42±10)°, and the angle γ are (13±10)°. Figure 5 In the example, the light guide is made of PMMA (polymethyl methacrylate). For most LED lights, the maximum incident angle α of the incident light is 60°. The refractive index of PMMA is 1.49, corresponding to a refraction angle of 35°. To ensure light efficiency, the LED light must undergo total internal reflection within the light guide. The minimum angle θ for total internal reflection within the PMMA light guide is 42°. Therefore, the angle γ can be calculated as: γ = 180° - β - 90° - θ = 180° - 35° - 90° - 42° = 13°. At this point, the narrowed section can achieve sufficient light mixing while maintaining maximum efficiency. The light mixing effect of the above embodiment is as follows: Figure 6 As shown, for RGB light sources, a conventional light guide with a 30mm mixing distance can mix white light at the core of the light guide, but there will still be monochromatic light scattered by red, green, and blue along the circumference, resulting in poor mixing effect in the outer circumference. However, with the reduced diameter section of the light-emitting structure in this patent, the entire radial surface of the light guide body will mix white light, resulting in a better overall mixing effect.
[0050] By setting an inwardly curved arc, the original uniform shape of the light guide is changed into an arc-shaped transition section with a certain curvature on the light-introducing side. By setting the arc-shaped transition section, the number of reflections of light inside the light guide can be increased, thereby enabling it to fully mix light.
[0051] like Figure 3 As shown, a normal light guide only reflects light about once within the mixing distance before it enters the light-emitting area with light guide teeth. However, a light guide with a mixing section can reflect light about five times at the same distance, greatly increasing the number of reflections and allowing the RGB light sources to be fully mixed.
[0052] A preferred embodiment, such as Figure 7 As shown, the surface of the light mixing section 21 is a stepped curve along the axial direction, which includes intersecting oblique lines 213 and connecting lines 214. Setting a stepped curve can also increase the number of light reflections, thereby optimizing the light mixing effect.
[0053] More preferably, the light mixing section 21 includes a reduced diameter section 211 and a light mixing body section 212 connected to the reduced diameter section 211. The longest perpendicular line segment between the axial extension line of the surface of the light mixing body section 212 and the stepped curve is h. The length of h is less than 1 / 4 of the diameter of the light mixing body section 212. When the angle δ formed by the oblique line 213 and the axial extension line of the surface of the light mixing body section 212 is in the range of (13±10)°, its light mixing effect is higher.
[0054] In the example, the connecting line 214 is parallel to the surface axial extension line of the light mixing body 212.
[0055] It should be noted that, unless otherwise specified, all features in the above embodiments or embodiments described herein can be freely combined.
[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "yet another embodiment," "another embodiment," "other embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions 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 suitable manner in one or more embodiments or examples. Furthermore, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.
[0057] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications and variations to the above embodiments within the scope of the present invention.
Claims
1. A light-emitting structure, characterized in that, It includes a multicolor light source (1) and a light guide (2), and the light guide includes a light mixing section (21) and a body section (22) along its length. The light mixing section (21) is located at one end close to the multicolor light source (1). The light mixing section (21) has an inwardly tapered section (211) along the axial direction. The main body section (22) has light guide teeth (23).
2. The light-emitting structure according to claim 1, characterized in that, The light mixing section (21) includes a narrowed section (211) and a light mixing body section (212) connected to the narrowed section (211). The two ends of the narrowed section (211) are respectively connected to the light mixing body section (212).
3. The light-emitting structure according to claim 2, characterized in that, The surface of the reduced diameter section (211) is an inwardly curved arc along the axial direction.
4. The light-emitting structure according to claim 3, characterized in that, The angle between the tangent at the starting end of the arc of the reduced diameter section (211) and the axial extension line of the surface of the light mixing body section (212) is γ, and the range of the γ angle is (13±10)°.
5. The light-emitting structure according to claim 2, characterized in that, The surface of the light mixing section (21) is a stepped curve along the axial direction. The stepped curve includes intersecting oblique lines (213) and connecting lines (214).
6. The light-emitting structure according to claim 5, characterized in that, The longest perpendicular segment between the surface axial extension line of the light mixing body (212) and the stepped curve is h, and the length of h is less than 1 / 4 of the diameter of the light mixing body (212). The angle δ formed by the oblique line (213) and the surface axial extension line of the light mixing body (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 the axial extension line of the surface of the light-mixing body part (212); and / or The diameter of the light mixing body part (212) is the same as the diameter of the body section (22).
8. The light-emitting structure according to claim 1, characterized in that, A multicolor light source (1) is a light source that includes 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 columnar 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 (212) and the diameter reduction part (211) are integrally connected.