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

Abstract

The invention discloses a linear light guide capable of uniformly guiding light, an optical system and an atmosphere lamp, a light inlet structure of the linear light guide comprises a center boss, the outer end face of the center boss is a main light inlet concave surface coaxially arranged at the center line position of a light mixing section, and the main light inlet concave surface is of a partial spherical surface structure sunken towards the direction close to a light outlet section; 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] The present invention relates to the technical field of atmosphere lamp components, and particularly relates to a linear light guide, an optical system and an atmosphere lamp capable of uniformly guiding light. Background Art

[0002] With the popularization of automobiles, consumers' requirements for the technological sense and high-class sense of automobiles are gradually increasing. Therefore, more and more vehicle models have added the design of atmosphere lamps. Among them, the linear atmosphere lamp is one of the most widely used types of atmosphere lamps, and the linear light guide in a linear structure is one of the core components of the linear atmosphere lamp.

[0003] Please refer to Chinese patents such as the publication numbers CN216408859U and CN214790731U. The light incident end faces (or incident light structures) of the existing linear light guides for receiving the light emitted by the LED lamp beads are all planar structures. Therefore, after the light enters the linear light guide, its distribution in the radial direction is not uniform (the light is usually concentrated at the center line position), resulting in the need to set a relatively long light mixing section for light mixing. Otherwise, there will be a situation where the brightness at the end of the light emitting section of the linear light guide is significantly higher than that in the middle, thereby making the overall light emitting uniformity of the linear atmosphere lamp relatively poor. Therefore, in order to avoid the above situation, the existing linear atmosphere lamps have relatively high requirements for the installation position and cannot be installed in positions with a narrow space where a relatively long light mixing section cannot be arranged, resulting in limited application scenarios and poor versatility.

[0004] It has become an urgent matter to solve the above problems. Summary of the Invention

[0005] In view of this, the present invention provides a linear light guide, an optical system and an atmosphere lamp capable of uniformly guiding light.

[0006] The technical solutions are as follows:

[0007] The first aspect of the present application relates to a linear light guide capable of uniformly guiding light, including a light guide body, which includes a light-emitting section in a linear structure. At least one end in the length direction of the light-emitting section is integrally formed with a light mixing section. One end of the light mixing section away from the light-emitting section is integrally formed with a light inlet structure. The light inlet structure includes a central boss. The outer end face of the central boss is a main light inlet concave surface coaxially arranged at the center line position of the light mixing section. The main light inlet concave surface is a partial spherical surface structure recessed towards the light-emitting section. The circumferential side wall of the central boss is composed of multiple inner ring block-shaped reflecting surfaces evenly distributed in the circumferential direction. The inner ring block-shaped reflecting surfaces are all arc surface structures protruding away from the main light inlet concave surface. The inner ends of the inner ring block-shaped reflecting surfaces are all connected to the outer edge of the main light inlet concave surface, and the distance between each inner ring block-shaped reflecting surface and the central axis of the main light inlet concave surface gradually increases from the inner end to the outer end. Thus, part of the light entering through the main light inlet concave surface will be reflected by each inner ring block-shaped reflecting surface, and the propagation route of the reflected light is parallel to the central axis of the main light inlet concave surface.

[0008] By using the above linear light guide capable of uniformly guiding light, by setting the main light inlet concave surface in a partial spherical surface structure, the light concentratedly entering from the vicinity of the central position can be diverged to the surrounding, and then combined with each inner ring block-shaped reflecting surface to reflect the diverged light so that the propagation route of the reflected light is parallel to the central axis of the main light inlet concave surface. Thus, after the light passes through the light guide body, especially at the position of entering the light mixing section, the light can be distributed relatively very uniformly in the radial direction and no longer concentrated at the center line position. Therefore, the length of the light mixing section can be greatly shortened. Even in the design with a shorter light mixing section, the overall light-emitting brightness of the light-emitting section can be very uniform, and the situation that the brightness at the end is significantly higher than that in the middle will not occur, making the light-emitting brightness at each position of the linear atmosphere lamp tend to be consistent. Thus, the linear atmosphere lamp can be installed at an installation position with a relatively narrow end installation space, and further, the application scenario of the linear atmosphere lamp is no longer limited, improving the versatility.

[0009] In some embodiments, the light uniformizing light inlet structure further includes an annular rib coaxially arranged around the central boss;

[0010] The inner circumferential surface of the annular rib is an outer ring block-shaped light inlet surface correspondingly arranged outside each inner ring block-shaped reflecting surface. The outer circumferential surface of the annular rib is an outer ring block-shaped reflecting surface correspondingly arranged outside each outer ring block-shaped light inlet surface. The two ends of each outer ring block-shaped light inlet surface are respectively connected to the outer end of the corresponding inner ring block-shaped reflecting surface and the inner end of the corresponding outer ring block-shaped reflecting surface;

[0011] Each outer ring block-shaped reflecting surface is an arc surface structure protruding away from the main light inlet concave surface, and the distance between each outer ring block-shaped reflecting surface and the central axis of the main light inlet concave surface gradually increases from the inner end to the outer end. Thus, the light entering through each outer ring block-shaped light inlet surface will be reflected by the corresponding outer ring block-shaped reflecting surface, and the propagation route of the reflected light is parallel to the central axis of the main light inlet concave surface.

[0012] In some embodiments, the outer ring block-shaped light incident surfaces are all arc surface structures that are concave away from the main light incident concave surface, and the distances between the respective outer ring block-shaped light incident surfaces and the central axis of the main light incident concave surface gradually increase from the end connected to the inner ring block-shaped reflecting surface to the end connected to the outer ring block-shaped light incident surface.

[0013] In some embodiments, the inner ends of the respective inner ring block-shaped reflecting surfaces are all transitioned with arcs at the joints with the main light incident concave surface, and the outer ends of the respective outer ring block-shaped light incident surfaces and the inner ends of the corresponding outer ring block-shaped reflecting surfaces are all transitioned with arcs.

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

[0015] In some embodiments, the wall of the circular sink is composed of block-shaped arc surfaces corresponding to the respective outer ring block-shaped reflecting surfaces one by one. Each block-shaped arc surface is an arc surface structure that is concave away from the main light incident concave surface, and the bottoms of the respective block-shaped arc surfaces are respectively connected to the outer ends of the corresponding outer ring block-shaped reflecting surfaces.

[0016] In some embodiments, a light guide installation and positioning seat is integrally formed outside the light incident structure, and the circular sink is formed recessed on the surface of the light guide installation and positioning seat away from the light output section.

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

[0018] The second aspect of the present application relates to an optical system, including the above-mentioned linear light guide capable of uniformly guiding light. PCBA is provided outside the light incident structure, and LED lamp beads with the light emitting surface facing the adjacent main light incident concave surface are integrated on the PCBA.

[0019] Adopting the above optical system, it has all the advantages of the above-mentioned linear light guide capable of uniformly guiding light.

[0020] The third aspect of the present application relates to an atmosphere lamp, including the above-mentioned optical system, and the PCBA is all installed in the lamp head housing.

[0021] Adopting the above atmosphere lamp, it has all the advantages of the above-mentioned linear light guide capable of uniformly guiding light. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of the linear light guide;

[0023] Figure 2 It is for Figure 1 The enlarged view at A in

[0024] Figure 3 Partial sectional view of a linear light guide;

[0025] Figure 4 Schematic structural diagram of an optical system;

[0026] Figure 5 Schematic diagram of the light path where the light emitted by the LED lamp beads enters the linear light guide;

[0027] Figure 6 Comparison diagram of the effects with or without the light incident structure of Embodiment 1 when the light guide body is provided with a light guide installation and positioning seat. Detailed implementation mode

[0028] The present invention will be further described below in conjunction with embodiments and the drawings.

[0029] Embodiment 1:

[0030] As Figures 1 - 3 and Figure 5 shown, a linear light guide capable of uniformly guiding light mainly includes a light guide body 100 in a linear structure.

[0031] Specifically, the light guide body 100 includes a light emitting section 110 in a linear structure. On the circumferential side wall of the light emitting section 110, optical teeth 170 are integrally formed and distributed along its length direction, so that a light emitting band is formed on the opposite side of the light emitting section 110 to the optical teeth 170.

[0032] At least one end in the length direction of the light emitting section 110 is integrally formed with a light mixing section 120, that is: the light emitting section 110 may be integrally formed with a light mixing section 120 at one end in the length direction, or may be integrally formed with light mixing sections 120 at both ends in the length direction. One end of the light mixing section 120 away from the light emitting section 110 is integrally formed with a light incident structure 130, and a lamp head is usually arranged outside the light incident structure 130. Therefore, whether to design one or two light mixing sections 120 is usually determined according to the length of the light emitting section 110. If the length of the light emitting section 110 is short, only one light mixing section 120 needs to be designed to ensure the overall brightness of the light emitting section 110; if the length of the light emitting section 110 is long, two light mixing sections 120 need to be designed to ensure the overall brightness of the light emitting section 110.

[0033] In this embodiment, the light incident structure 130 includes a central boss 131. The outer end face of the central boss 131 is a main light incident concave surface 131a coaxially arranged at the center line position of the light mixing section 120. The circumferential side wall of the central boss 131 is composed of a plurality of inner ring block-shaped reflecting surfaces 131b evenly distributed in the circumferential direction. Moreover, the inner ends of the inner ring block-shaped reflecting surfaces 131b are all connected to the outer edge of the main light incident concave surface 131a, and the distance between each inner ring block-shaped reflecting surface 131b and the central axis of the main light incident concave surface 131a gradually increases from the inner end to the outer end, so that the central boss 131 as a whole forms an approximately frustum structure.

[0034] Most importantly, please refer to Figure 5 , the main light incident concave surface 131a is a partial spherical surface structure recessed towards the light exit section 110, and the inner ring block-shaped reflecting surfaces 131b are all arc-shaped surfaces protruding away from the main light incident concave surface 131a. Thus, part of the light entering through the main light incident concave surface 131a will be reflected by each inner ring block-shaped reflecting surface 131b, and the propagation route of the reflected light is parallel to the central axis of the main light incident concave surface 131a.

[0035] Therefore, by setting the main light incident concave surface 131a with a partial spherical surface structure, the light concentratedly entering from the vicinity of the center position can be refracted by the main light incident concave surface 131a and diverge towards the surrounding. Then, with the cooperation of a plurality of inner ring block-shaped reflecting surfaces 131b evenly distributed in a ring shape, the diverging light is reflected so that the propagation route of the light is parallel to the central axis of the main light incident concave surface. Thus, after the light passes through the light guide body 100, especially at the position where it enters the light mixing section 120, the light can be distributed relatively very evenly in the radial direction and no longer concentrated at the center line position. Thereby, the length of the light mixing section 120 can be greatly shortened. Even in the design with a shorter light mixing section 120, the overall luminous brightness of the light exit 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. The luminous brightness at each position of the linear atmosphere lamp tends to be consistent, so that the linear atmosphere lamp can be installed at an installation position with a relatively narrow end installation space. Furthermore, the application scenario of the linear atmosphere lamp is no longer limited, improving the versatility.

[0036] Furthermore, please refer to Figure 2 、 Figure 3 and Figure 5 , the light uniform incident structure further includes an annular rib 132 coaxially arranged around the central boss 131, that is: the annular rib 132 is coaxially arranged outside the central boss 131.

[0037] Specifically, the inner circumferential surface of the annular convex rib 132 is an outer ring block-shaped light incident surface 132a disposed corresponding to the outside of each inner ring block-shaped reflecting surface 131b one by one, and the outer circumferential surface of the annular convex rib 132 is an outer ring block-shaped reflecting surface 132b disposed corresponding to the outside of each outer ring block-shaped light incident surface 132a one by one. Both ends of each outer ring block-shaped light incident surface 132a are respectively connected to the outer end of the corresponding inner ring block-shaped reflecting surface 131b and the inner end of the corresponding outer ring block-shaped reflecting surface 132b; each outer ring block-shaped reflecting surface 132b is an arc surface structure protruding away from the main light incident concave surface 131a, and the distance between each outer ring block-shaped reflecting surface 132b and the central axis of the main light incident concave surface 131a gradually increases from the inner end to the outer end. Therefore, the light entering through each outer ring block-shaped light incident surface 132a will be reflected by the corresponding outer ring block-shaped reflecting surface 132b, and the propagation route of the reflected light is parallel to the central axis of the main light incident concave surface 131a.

[0038] Therefore, part of the light emitted by the light source that does not shoot towards the main light incident concave surface 131a can enter the light guide body 100 through the outer ring block-shaped light incident surface 132a, then be refracted and shoot towards the outer ring block-shaped reflecting surface 132b, and make the propagation route of the light parallel to the central axis of the main light incident 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 atmosphere lamp.

[0039] Furthermore, each outer ring block-shaped light incident surface 132a is an arc surface structure recessed away from the main light incident concave surface 131a, and the distance between each outer ring block-shaped light incident surface 132a and the central axis of the main light incident concave surface 131a gradually increases from the end connected to the inner ring block-shaped reflecting surface 131b to the end connected to the outer ring block-shaped light incident surface 132a. Through such a design, the light incident from the outer ring block-shaped light incident surface 132a can be guided to the outer ring block-shaped reflecting surface 132b for refraction as much as possible, further increasing the brightness of the light emitting section 110.

[0040] In this embodiment, the connection between the inner end of each inner ring block-shaped reflecting surface 131b and the main light incident concave surface 131a adopts an arc transition, and the connection between the outer end of each outer ring block-shaped light incident surface 132a and the inner end of the corresponding outer ring block-shaped reflecting surface 132b also adopts an arc transition. Through such a design, the light can be totally reflected inside as much as possible, reducing the possibility of light exiting at the connection between the inner ring block-shaped reflecting surface 131b and the main light incident concave surface 131a and at the connection between the outer ring block-shaped light incident surface 132a and the outer ring block-shaped reflecting surface 132b, thereby further increasing the brightness of the light emitting section 110.

[0041] In this embodiment, the light incident structure 130 further includes a circular sink 133 formed coaxially and recessed around the central boss 131. The central boss 131 and the annular rib 132 are integrally formed on the bottom of the circular sink 133. Therefore, the light source can extend into the circular sink 133, and the light can be blocked by the wall of the circular sink 133, so as to avoid light leakage and further improve the light collection rate.

[0042] Furthermore, the wall of the circular sink 133 is preferably composed of block-shaped arc surfaces 133a corresponding to the outer block-shaped reflecting surfaces 132b one by one. Each block-shaped arc surface 133a is an arc surface structure recessed away from the main light incident concave surface 131a, and the bottoms of the block-shaped arc surfaces 133a are respectively connected to the outer ends of the corresponding outer block-shaped reflecting surfaces 132b. The radian of the block-shaped arc surface 133a matches the radian of the outer block-shaped reflecting surface 132b, which can make the size of the outer block-shaped reflecting surface 132b as large as possible, so that more light can be reflected by the outer block-shaped reflecting surface 132b into a state where the light propagation route is parallel to the central axis of the main light incident concave surface 131a, thereby further improving the brightness of the light emitting section 110.

[0043] It should be noted that the wall of the circular sink 133 can also be a smooth circular ring structure.

[0044] Embodiment 2:

[0045] Please refer to Figure 4 and Figure 5 , an optical system, including the linear light guide capable of uniformly guiding light in Embodiment 1, PCBA 200 is disposed outside the light incident structure 130, and LED lamp beads 210 are integrated on the PCBA 200. The light emitting surfaces of the LED lamp beads 210 are respectively facing the adjacent main light incident concave surfaces 131a.

[0046] Therefore, most of the light emitted by the LED lamp beads 210 enters the linear light guide 100 through the main light incident concave surface 131a, and the leaked light can enter the linear light guide 100 through the outer block-shaped light incident surfaces 132a.

[0047] Embodiment 3:

[0048] An atmosphere lamp, including the optical system in Embodiment 2, lamp heads are disposed outside the light incident structure 130 and are matched with it. Specifically, the lamp head includes a lamp head housing and a PCBA 200 installed in the lamp head housing.

[0049] In this embodiment, the light guide body 100 can be installed on a light guide bracket, and the lamp head is installed on the light guide bracket. The light guide body 100 can also be integrally formed with a light guide installation and positioning seat 140 outside its light incident structure 130, and the lamp head is installed on the light guide installation and positioning seat 140, thus eliminating the need for a light guide bracket and reducing the cost of the atmosphere lamp. Correspondingly, a circular sunk groove 133 is recessed on the surface of the light guide installation and positioning seat 140 away from the light emitting section 110, so as to match the LED lamp beads 210.

[0050] And, please refer to Figure 6 , if the light incident structure 130 of Embodiment 1 is not provided, after the light enters the light guide body 100, the large-angle light will not enter the light mixing section 120, but will be directed to the light guide installation and positioning seat 140 and finally exit through the light guide installation and positioning seat 140, resulting in a problem of low brightness in the light emitting section 110. By adding the light incident structure 130 of Embodiment 1, the large-angle light that originally did not enter the light mixing section 120 can be reflected to the light mixing section 120 by the inner ring block-shaped reflecting surface 131b and the outer ring block-shaped reflecting surface 132b, thereby improving the luminous brightness of the light emitting section 110.

[0051] If the light guide body 100 is installed on the light guide bracket, an anti-rotation rib 150 extending along its length direction is integrally formed on the circumferential side wall of the light guide body 100, and an anti-rotation structure adapted to the anti-rotation rib 150 is formed on the light 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 light guide bracket, ensuring the stability and reliability of the installation of the light guide body 100.

[0052] Finally, it should be noted that the above description is only the preferred embodiment of the present invention. Under the inspiration of the present invention, those of ordinary skill in the art can make various similar representations without departing from the purpose and claims of the present invention. Such transformations all fall within the protection scope of the present invention.

Claims

1. A linear light guide capable of uniformly guiding light, comprising a light guide body, the light guide body including a linear light-emitting segment, a light-mixing segment integrally formed at at least one end of the light-emitting segment in a longitudinal direction, and a light-inlet structure integrally formed at an end of the light-mixing segment remote from the light-emitting segment, characterized in that: The light incident structure includes a central boss. The outer end face of the central boss is a main light incident concave surface coaxially arranged at the center line position of the light mixing section. The main light incident concave surface is a partial spherical surface structure recessed towards the light output section. The circumferential side wall of the central boss is composed of multiple inner ring block-shaped reflecting surfaces evenly distributed in the circumferential direction. The inner ring block-shaped reflecting surfaces are all arc surface structures protruding away from the main light incident concave surface. The inner ends of the inner ring block-shaped reflecting surfaces are all connected to the outer edge of the main light incident concave surface, and the distance between each inner ring block-shaped reflecting surface and the central axis of the main light incident concave surface gradually increases from the inner end to the outer end. Thus, part of the light entering through the main light incident concave surface will be reflected by each inner ring block-shaped reflecting surface, and the propagation route of the reflected light is parallel to the central axis of the main light incident concave surface.

2. The linear light guide capable of uniformly guiding light according to claim 1, wherein: The light uniform incident structure further includes an annular rib coaxially arranged around the central boss; The inner circumferential surface of the annular rib is an outer ring block-shaped light incident surface correspondingly arranged outside each inner ring block-shaped reflecting surface. The outer circumferential surface of the annular rib is an outer ring block-shaped reflecting surface correspondingly arranged outside each outer ring block-shaped light incident surface. The two ends of each outer ring block-shaped light incident surface are respectively connected to the outer end of the corresponding inner ring block-shaped reflecting surface and the inner end of the corresponding outer ring block-shaped reflecting surface; Each outer ring block-shaped reflecting surface is an arc surface structure protruding away from the main light incident concave surface, and the distance between each outer ring block-shaped reflecting surface and the central axis of the main light incident concave surface gradually increases from the inner end to the outer end. Thus, the light entering through each outer ring block-shaped light incident surface will be reflected by the corresponding outer ring block-shaped reflecting surface, and the propagation route of the reflected light is parallel to the central axis of the main light incident concave surface.

3. The linear light guide capable of uniformly guiding light according to claim 2, wherein: Each outer ring block-shaped light incident surface is an arc surface structure recessed away from the main light incident concave surface. The distance between each outer ring block-shaped light incident surface and the central axis of the main light incident concave surface gradually increases from the end connected to the inner ring block-shaped reflecting surface to the end connected to the outer ring block-shaped light incident surface.

4. The linear light guide capable of uniformly guiding light according to claim 3, characterized in that: The connection between the inner end of each inner ring block-shaped reflecting surface and the main light incident concave surface adopts an arc transition. The outer end of each outer ring block-shaped light incident surface and the inner end of the corresponding outer ring block-shaped reflecting surface both adopt an arc transition.

5. The linear light guide capable of uniformly guiding light according to claim 2, wherein: The light incident structure further includes a circular groove coaxially recessed around the central boss. The central boss and the annular rib are integrally formed on the bottom of the circular groove.

6. The linear light guide capable of uniformly guiding light according to claim 5, characterized in that: The groove wall of the circular groove is composed of block-shaped arc surfaces corresponding to each outer ring block-shaped reflecting surface. Each block-shaped arc surface is an arc surface structure recessed away from the main light incident concave surface, and the bottom of each block-shaped arc surface is respectively connected to the outer end of the corresponding outer ring block-shaped reflecting surface.

7. The linear light guide capable of uniformly guiding light according to claim 5, characterized in that: A light guide installation and positioning seat is integrally formed outside the light incident structure. The circular groove is recessed on the surface of the light guide installation and positioning seat away from the light output section.

8. The linear light guide capable of uniformly guiding light according to claim 1, characterized in that: A rotation prevention rib extending along its length direction is integrally formed on the circumferential side wall of the light guide body. At least one positioning block is integrally formed on the rotation prevention rib.

9. An optical system, characterized in that: Including the linear light guide capable of uniformly guiding light according to any one of claims 1-8, a PCBA is arranged outside the light incident structure, and LED lamp beads with the light emitting surface facing the adjacent main light incident concave surface are integrated on the PCBA.

10. An ambient light, characterized in that: Including the optical system according to claim 9, the PCBA is installed in the lamp head housing.

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