Linear light guide capable of being uniformly lightened, optical system and atmosphere lamp

Abstract

The utility model discloses a linear light guide capable of uniformly lighting, an optical system and an atmosphere lamp, a light inlet structure of the linear light guide comprises a central boss, the outer end face of the central boss is a main light inlet concave surface coaxially arranged at the position of the center line of a light mixing section, the main light inlet concave surface is a partial spherical surface structure recessed towards the direction close to a light outlet section, and the light outlet section is a spherical surface. The circumferential side wall of the central boss is composed of a plurality of inner ring block-shaped reflecting surfaces which are evenly distributed in the circumferential direction, and the inner ring block-shaped reflecting surfaces are all of an arc surface structure protruding towards the direction away from the main light inlet concave surface, so that light rays are refracted through the main light inlet concave surface and then reflected through the inner ring block-shaped reflecting surfaces after passing through the light guide body. Therefore, the light in the light guide body is relatively uniformly distributed in the radial direction, the condition that the brightness of the end parts is obviously higher than that of the middle part is avoided, and the brightness of each position of the linear atmosphere lamp tends to be consistent.

Description

Technical Field

[0001] This utility model relates to the technical field of ambient light components, specifically to a linear light guide, optical system, and ambient light capable of uniform illumination. Background Technology

[0002] With the increasing popularity of automobiles, consumers are demanding more and more technological and premium features from their vehicles. As a result, more and more car models are incorporating ambient lighting designs. Among these, linear ambient lighting is the most widely used type, with linear light guides, which have a linear structure, being one of its core components.

[0003] Please refer to Chinese patents with publication numbers CN216408859U and CN214790731U. Existing linear light guides have planar light-receiving end faces (or light-receiving structures) for receiving light emitted by LED beads. Therefore, after the light enters the linear light guide, its radial distribution is not uniform (the light is usually concentrated at the center line). This requires setting a longer light mixing section for light mixing. Otherwise, the brightness of the light-emitting section of the linear light guide will be significantly higher at the end than in the middle, resulting in poor overall light uniformity of the linear ambient light. Therefore, to avoid the above situation, existing linear ambient lights have high requirements for installation location and cannot be installed in narrow spaces where a long light mixing section cannot be arranged, resulting in limited application scenarios and poor versatility.

[0004] Solving these problems is now a top priority. Utility Model Content

[0005] In view of this, the present invention provides a linear light guide, optical system and ambient light capable of uniform illumination.

[0006] The technical solution is as follows:

[0007] The first aspect of this application relates to a linear light guide capable of uniform illumination, comprising a light guide body, the light guide body including a light-emitting segment with a linear structure, at least one end of the light-emitting segment having an integrally formed light-mixing segment along its length, and the end of the light-mixing segment away from the light-emitting segment having an integrally formed light-incoming structure, the light-incoming structure including a central boss, the outer end face of which is a main light-incoming concave surface coaxially disposed at the center line of the light-mixing segment, the main light-incoming concave surface being a partially spherical structure recessed towards the light-emitting segment, the central boss... The circumferential sidewall of the boss is composed of multiple inner ring block-shaped reflective surfaces evenly distributed circumferentially. Each inner ring block-shaped reflective surface is an arc-shaped structure that bulges away from the main light-gathering concave surface. The inner end of each inner ring block-shaped reflective surface is connected to the outer edge of the main light-gathering concave surface, and the distance between each inner ring block-shaped reflective surface and the central axis of the main light-gathering concave surface gradually increases from the inner end to the outer end. This allows some of the light entering through the main light-gathering concave surface to be reflected by each inner ring block-shaped reflective surface, and the propagation path of the reflected light is parallel to the central axis of the main light-gathering concave surface.

[0008] By employing the above-mentioned linear light guide capable of uniform illumination, and by setting a main light-incoming concave surface with a partially spherical structure, light rays concentrated near the center can be diffused outwards. Combined with the inner ring block-shaped reflective surfaces, the diffused light rays are reflected so that their propagation paths are parallel to the central axis of the main light-incoming concave surface. This results in a relatively uniform radial distribution of light behind the light guide body, especially at the point of entry into the mixing section, rather than concentrating at the center line. This significantly shortens the length of the mixing section. Even with a shorter mixing section, the overall brightness of the light-emitting section remains very uniform, without the end brightness being significantly higher than the middle brightness. This ensures consistent brightness across all positions of the linear ambient light, allowing it to be installed in narrower installation spaces at the ends. This expands the application scenarios of the linear ambient light, improving its versatility.

[0009] In some embodiments, the light-equalizing structure further includes an annular rib coaxially disposed around the central boss;

[0010] The inner circumferential surface of the annular rib is a corresponding outer ring block light-increasing surface arranged outside each inner ring block light-increasing surface, and the outer circumferential surface of the annular rib is a corresponding outer ring block light-increasing surface arranged outside each outer ring block light-increasing surface. The two ends of each outer ring block light-increasing surface are respectively connected to the outer end of the corresponding inner ring block light-increasing surface and the inner end of the corresponding outer ring block light-increasing surface.

[0011] Each outer ring of block-shaped reflective surfaces is an arc-shaped structure that bulges away from the main light-incoming concave surface. The distance between each outer ring of block-shaped reflective surface and the central axis of the main light-incoming concave surface gradually increases from the inner end to the outer end. This ensures that the light entering through each outer ring of block-shaped light-incoming surface is reflected by the corresponding outer ring of block-shaped reflective surface, and the propagation path of the reflected light is parallel to the central axis of the main light-incoming concave surface.

[0012] In some embodiments, the outer ring block light-gathering surfaces are all arc-shaped structures that are recessed away from the main light-gathering concave surface, and the distance between the central axis of each outer ring block light-gathering surface and the main light-gathering concave surface gradually increases from the end connected to the inner ring block reflective surface to the end connected to the outer ring block light-gathering surface.

[0013] In some implementations, the inner end of each inner ring block-shaped reflective surface is connected to the main light-incoming concave surface by a rounded transition, and the outer end of each outer ring block-shaped light-incoming surface is connected to the inner end of the corresponding outer ring block-shaped reflective surface by a rounded transition.

[0014] In some embodiments, the light-gathering structure further includes a circular recessed groove coaxially recessed around the central boss, wherein the central boss and the annular rib are integrally formed on the bottom of the circular recessed groove.

[0015] In some embodiments, the wall of the circular sink is composed of blocky arc-shaped surfaces that correspond one-to-one with each outer ring blocky reflective surface. Each blocky arc-shaped surface is an arc-shaped structure that is recessed away from the main light-gathering concave surface, and the bottom of each blocky arc-shaped surface is connected to the outer end of the corresponding outer ring blocky reflective surface.

[0016] In some embodiments, the light-gathering structure is integrally formed with a light guide mounting and positioning seat, and the circular recess is formed on the side surface of the light guide mounting and positioning seat away from the light-emitting section.

[0017] In some embodiments, an anti-rotation rib extending along the length direction is integrally formed on the circumferential sidewall of the light guide body, and at least one positioning block is integrally formed on the anti-rotation rib.

[0018] The second aspect of this application relates to an optical system, including the aforementioned linear light guide capable of uniform illumination, wherein each light-inlet structure is provided with a PCBA, and each PCBA integrates LED beads with their light-emitting surfaces facing adjacent main light-inlet concave surfaces.

[0019] The optical system described above possesses all the advantages of a linear light guide capable of uniform illumination.

[0020] A third aspect of this application relates to an ambient light, including the aforementioned optical system, wherein the PCBAs are all mounted in the lamp head housing.

[0021] The above ambient lights possess all the advantages of a linear light guide that can provide uniform illumination. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a linear optical guide.

[0023] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0024] Figure 3 This is a partial cross-sectional view of a linear light guide;

[0025] Figure 4 This is a schematic diagram of the optical system.

[0026] Figure 5 A schematic diagram of the light path of light emitted from an LED bead entering a linear light guide;

[0027] Figure 6 A comparison diagram showing the effect of having and not having the light-gathering structure of Example 1 when the light guide body is equipped with a light guide mounting and positioning seat. Detailed Implementation

[0028] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0029] Example 1:

[0030] like Figures 1-3 as well as Figure 5 As shown, a linear light guide capable of uniform illumination mainly includes a light guide body 100 with a linear structure.

[0031] Specifically, the light guide body 100 includes a light-emitting section 110 with a linear structure. Optical teeth 170 distributed along its length direction are integrally formed on the circumferential sidewall of the light-emitting section 110, thereby forming a light-emitting band opposite the optical teeth 170.

[0032] At least one end of the light-emitting segment 110 along its length has an integrally formed light-mixing segment 120. That is, the light-emitting segment 110 can have a light-mixing segment 120 integrally formed at one end along its length, or both ends of the light-emitting segment 110 can have a light-mixing segment 120 integrally formed at both ends along its length. The end of the light-mixing segment 120 furthest from the light-emitting segment 110 has an integrally formed light-inlet structure 130, and a lamp holder is typically mounted on the outer side of the light-inlet structure 130. Therefore, whether to design one or two light-mixing segments 120 usually depends on the length of the light-emitting segment 110. If the light-emitting segment 110 is short, only one light-mixing segment 120 is needed to ensure the overall brightness of the light-emitting segment 110; if the light-emitting segment 110 is long, two light-mixing segments 120 are needed to ensure the overall brightness of the light-emitting segment 110.

[0033] In this embodiment, the light-gathering structure 130 includes a central boss 131. The outer end face of the central boss 131 is a main light-gathering concave surface 131a coaxially disposed at the center line of the light mixing section 120. The circumferential sidewall of the central boss 131 is composed of multiple inner ring block-shaped reflective surfaces 131b evenly distributed along the circumference. Furthermore, the inner end of each inner ring block-shaped reflective surface 131b is connected to the outer edge of the main light-gathering concave surface 131a. The distance between each inner ring block-shaped reflective surface 131b and the central axis of the main light-gathering concave surface 131a gradually increases from the inner end to the outer end, so that the central boss 131 as a whole constitutes an approximately frustum structure.

[0034] Most importantly, please see Figure 5 The main light-entering concave surface 131a is a partially spherical structure that is recessed towards the light-emitting section 110. The inner ring block-shaped reflective surfaces 131b are all arc-shaped structures that bulge away from the main light-entering concave surface 131a. As a result, part of the light entering through the main light-entering concave surface 131a will be reflected by each inner ring block-shaped reflective surface 131b, and the propagation path of the reflected light is parallel to the central axis of the main light-entering concave surface 131a.

[0035] Therefore, by setting a main light-incoming concave surface 131a with a partially spherical structure, light rays concentrated near the center can be refracted by the main light-incoming concave surface 131a and dispersed to the surrounding area. In addition, multiple inner ring block-shaped reflective surfaces 131b evenly distributed in a ring shape reflect the dispersed light rays so that the light propagation path is parallel to the central axis of the main light-incoming concave surface. As a result, the light rays after entering the light guide body 100, especially at the position of entering the light mixing section 120, can be distributed relatively evenly in the radial direction, no longer concentrated at the center line. This can significantly shorten the length of the light mixing section 120. Even in the design of using a shorter light mixing section 120, the overall luminous brightness of the light emitting section 110 can be very uniform, and there will be no situation where the brightness at the end is significantly higher than that in the middle. This makes the luminous brightness of each position of the linear ambient light tend to be consistent, so that the linear ambient light can be installed in the installation position where the installation space at the end is narrow. This makes the application scenarios of the linear ambient light no longer limited and improves its versatility.

[0036] Further, please see Figure 2 , Figure 3 and Figure 5 The uniform light-gathering structure also includes an annular rib 132 coaxially disposed around the central boss 131, that is: the annular rib 132 is coaxially disposed on the outside of the central boss 131.

[0037] Specifically, the inner circumferential surface of the annular rib 132 is a corresponding outer ring block-shaped light-increasing surface 132a arranged outside each inner ring block-shaped reflective surface 131b, and the outer circumferential surface of the annular rib 132 is a corresponding outer ring block-shaped reflective surface 132b arranged outside each outer ring block-shaped light-increasing surface 132a. The two ends of each outer ring block-shaped light-increasing surface 132a are respectively connected to the outer end of the corresponding inner ring block-shaped reflective surface 131b and the inner end of the corresponding outer ring block-shaped reflective surface 132b. Each outer ring block-shaped reflective surface 132b is an arc-shaped structure that protrudes away from the main light-increasing concave surface 131a, and the distance between each outer ring block-shaped reflective surface 132b and the central axis of the main light-increasing concave surface 131a gradually increases from the inner end to the outer end. This allows the light entering through each outer ring block-shaped light-increasing surface 132a to be reflected by the corresponding outer ring block-shaped reflective surface 132b, and the propagation path of the reflected light is parallel to the central axis of the main light-increasing concave surface 131a.

[0038] Therefore, the light emitted from the light source that does not reach the main light-incoming concave surface 131a can enter the light guide body 100 through the outer ring block light-incoming surface 132a, and then be refracted towards the outer ring block reflective surface 132b, making the light propagation path parallel to the central axis of the main light-incoming concave surface, thereby improving the light collection rate, increasing the brightness of the light-emitting section 110, and enhancing the lighting effect of the linear ambient light.

[0039] Furthermore, the outer ring of block-shaped light-introducing surfaces 132a are all arc-shaped structures recessed away from the main light-introducing concave surface 131a. The distance between the central axis of each outer ring of block-shaped light-introducing surface 132a and the main light-introducing concave surface 131a gradually increases from the end connected to the inner ring of block-shaped reflective surface 131b towards the end connected to the outer ring of block-shaped light-introducing surface 132a. Through this design, as much light as possible incident from the outer ring of block-shaped light-introducing surfaces 132a can be guided to the outer ring of block-shaped reflective surface 132b for refraction, further improving the brightness of the light-emitting section 110.

[0040] In this embodiment, the inner end of each inner ring block-shaped reflective surface 131b and the main light-incoming concave surface 131a are connected by a rounded transition, and the outer end of each outer ring block-shaped light-incoming surface 132a and the inner end of the corresponding outer ring block-shaped reflective surface 132b are also connected by a rounded transition. This design allows light to undergo total internal reflection as much as possible, reducing the likelihood of light escaping from the junctions of the inner ring block-shaped reflective surface 131b and the main light-incoming concave surface 131a, and from the junctions of the outer ring block-shaped light-incoming surface 132a and the outer ring block-shaped reflective surface 132b, thereby further improving the brightness of the light-emitting section 110.

[0041] In this embodiment, the light-gathering structure 130 also includes a circular recessed groove 133 coaxially recessed around the central boss 131. The central boss 131 and the annular rib 132 are integrally formed on the bottom of the circular recessed groove 133, so that the light source can be inserted into the circular recessed groove 133 and blocked by the groove wall of the circular recessed groove 133, thereby avoiding light leakage and further improving the light collection rate.

[0042] Furthermore, the wall of the circular recess 133 is preferably composed of blocky arc-shaped surfaces 133a corresponding one-to-one with each outer ring blocky reflective surface 132b. Each blocky arc-shaped surface 133a is an arc-shaped structure that is concave away from the main light-entry concave surface 131a, and the bottom of each blocky arc-shaped surface 133a is connected to the outer end of the corresponding outer ring blocky reflective surface 132b. The curvature of the blocky arc-shaped surface 133a matches the curvature of the outer ring blocky reflective surface 132b, which allows the size of the outer ring blocky reflective surface 132b to be made as large as possible. This allows more light to be reflected by the outer ring blocky reflective surface 132b into a state where the light propagation path is parallel to the central axis of the main light-entry concave surface 131a, thereby further improving the brightness of the light-emitting section 110.

[0043] It should be noted that the walls of the circular settling tank 133 can also be a smooth, annular structure.

[0044] Example 2:

[0045] Please see Figure 4 and Figure 5 An optical system includes a linear light guide capable of uniform illumination as described in Embodiment 1. A PCBA 200 is provided on each of the light-inlet structures 130. LED beads 210 are integrated on each of the PCBA 200. The light-emitting surfaces of the LED beads 210 are respectively facing the adjacent main light-inlet concave surfaces 131a.

[0046] Therefore, most of the light emitted by the LED bead 210 enters the linear light guide 100 through the main light-inlet concave surface 131a, while the light that is missed can enter the linear light guide 100 through each outer ring block light-inlet surface 132a.

[0047] Example 3:

[0048] An ambient light includes the optical system of embodiment 2, wherein a matching lamp head is provided on the outer side of the light-receiving structure 130. Specifically, the lamp head includes a lamp head housing and a PCBA200 installed in the lamp head housing.

[0049] In this embodiment, the light guide body 100 can be mounted on a light guide bracket, and the lamp head can be mounted on the light guide bracket. Alternatively, the light guide body 100 can have a light guide mounting and positioning seat 140 integrally formed on its light-intake structure 130, with the lamp head mounted on the light guide mounting and positioning seat 140, thus eliminating the need for a light guide bracket and reducing the cost of the ambient light. Correspondingly, a circular recess 133 is formed on the surface of the light guide mounting and positioning seat 140 away from the light-emitting section 110, thereby matching the LED lamp bead 210.

[0050] And please see Figure 6 Without the light-inlet structure 130 of Embodiment 1, after the light enters the light guide body 100, large-angle light rays will not enter the mixing section 120, but will instead be directed towards the light guide mounting and positioning seat 140, and finally emitted outward through the light guide mounting and positioning seat 140, resulting in low brightness in the light-emitting section 110. By adding the light-inlet structure 130 of Embodiment 1, large-angle light rays that would not normally enter the mixing section 120 can be reflected towards the mixing section 120 by the inner ring block reflective surface 131b and the outer ring block reflective surface 132b, thereby improving the luminous brightness of the light-emitting section 110.

[0051] If the optical guide body 100 is mounted on an optical guide bracket, an anti-rotation rib 150 extending along its length is integrally formed on the circumferential sidewall of the optical guide body 100, and an anti-rotation structure adapted to the anti-rotation rib 150 is formed on the optical guide bracket. At the same time, at least one positioning block 160 is integrally formed on the anti-rotation rib 150, and a positioning structure adapted to the positioning block 160 is formed on the optical guide bracket, thus ensuring the stability and reliability of the installation of the optical guide body 100.

[0052] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model. Those skilled in the art, under the guidance of the present utility model, can make various similar representations without departing from the spirit and claims of the present utility model, and such modifications all fall within the protection scope of the present utility model.

Claims

1. A linear light guide capable of uniform illumination, comprising a light guide body, the light guide body comprising a light exit section in a linear structure, at least one end of the light exit section in the length direction being integrally formed with a light mixing section, the light mixing section being integrally formed with a light entrance structure away from the end of the light exit section, characterized in that: The light-gathering structure includes a central boss, the outer end face of which is a main light-gathering concave surface coaxially disposed at the center line of the light mixing section. The main light-gathering concave surface is a partially spherical structure recessed towards the light-emitting section. The circumferential sidewall of the central boss is composed of multiple inner ring block-shaped reflective surfaces evenly distributed circumferentially. Each inner ring block-shaped reflective surface is an arc-shaped structure protruding away from the main light-gathering concave surface. The inner end of each inner ring block-shaped reflective surface is connected to the outer edge of the main light-gathering concave surface, and the distance between each inner ring block-shaped reflective surface and the central axis of the main light-gathering concave surface gradually increases from the inner end to the outer end. This allows some of the light entering through the main light-gathering concave surface to be reflected by each inner ring block-shaped reflective surface, and the propagation path of the reflected light is parallel to the central axis of the main light-gathering concave surface.

2. A linear luminaire according to claim 1, characterized in that: The light-gathering structure also includes an annular rib coaxially disposed around the central boss; The inner circumferential surface of the annular rib is a corresponding outer ring block light-gathering surface arranged outside each inner ring block light-gathering surface, and the outer circumferential surface of the annular rib is a corresponding outer ring block light-gathering surface arranged outside each outer ring block light-gathering surface. The two ends of each outer ring block light-gathering surface are respectively connected to the outer end of the corresponding inner ring block light-gathering surface and the inner end of the corresponding outer ring block light-gathering surface. Each outer ring of block-shaped reflective surfaces is an arc-shaped structure that bulges away from the main light-incoming concave surface. The distance between each outer ring of block-shaped reflective surface and the central axis of the main light-incoming concave surface gradually increases from the inner end to the outer end. This ensures that the light entering through each outer ring of block-shaped light-incoming surface is reflected by the corresponding outer ring of block-shaped reflective surface, and the propagation path of the reflected light is parallel to the central axis of the main light-incoming concave surface.

3. A linear luminaire according to claim 2, wherein: The outer ring block light-gathering surfaces are all arc-shaped structures that are concave away from the main light-gathering concave surface. The distance between the central axis of each outer ring block light-gathering surface and the main light-gathering concave surface gradually increases from the end connected to the inner ring block reflective surface to the end connected to the outer ring block light-gathering surface.

4. A linear luminaire according to claim 3, wherein: The inner end of each inner ring block-shaped reflective surface and the main light-incoming concave surface are connected by a rounded transition, and the outer end of each outer ring block-shaped light-incoming surface and the inner end of the corresponding outer ring block-shaped reflective surface are connected by a rounded transition.

5. A linear luminaire according to claim 2, wherein: The light-gathering structure also includes a circular recessed groove coaxially recessed around the central boss, and the central boss and the annular rib are integrally formed on the bottom of the circular recessed groove.

6. A linear luminaire according to claim 5, wherein: The wall of the circular sink is composed of blocky arc-shaped surfaces that correspond one-to-one with each outer ring blocky reflective surface. Each blocky arc-shaped surface is an arc-shaped structure that is concave away from the main light-gathering concave surface, and the bottom of each blocky arc-shaped surface is connected to the outer end of the corresponding outer ring blocky reflective surface.

7. A linear luminaire according to claim 5, wherein: The light-gathering structure is integrally formed with a light guide mounting and positioning seat, and the circular recess is formed on the side surface of the light guide mounting and positioning seat away from the light-emitting section.

8. A linear luminaire according to claim 1, wherein: An anti-rotation rib extending along its length is integrally formed on the circumferential sidewall of the optical guide body, and at least one positioning block is integrally formed on the anti-rotation rib.

9. An optical system characterized by: The invention includes a linear light guide capable of uniform illumination as described in any one of claims 1-8, wherein a PCBA is provided outside the light-incoming structure, and LED beads with their light-emitting surfaces facing the adjacent main light-incoming concave surfaces are integrated on the PCBA.

10. An atmosphere lamp characterized by: The optical system includes the one described in claim 9, wherein all PCBAs are installed in the lamp head housing.

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