Light guide based on linear light guide, optical system and vehicle lamp

Abstract

The utility model discloses a light guide piece, optical system and car light based on linear light guide, wherein the outside of the first light emitting section of light guide piece all projects and forms at least one light spreading convex rib arranged side by side, thereby can effectively increase the light emitting angle of each linear light guide, eliminate the dark area caused by the insufficient light emitting angle of linear light guide at the position of lampshade corresponding main body optical area, effectively improve the uniformity of the light emitting brightness of lampshade corresponding main body optical area position, the inner bending one side of the bending transition of main body optical area and end optical area projects and forms the light supplement band, not only can reflect part of light to the area of the inner bending one side of lampshade corresponding main body optical area through the light supplement optical pattern, increase the brightness of the area, avoid the generation of strip dark area, but also can guide more light to end optical area, improve the brightness of lampshade corresponding end optical area position, make the brightness of lampshade corresponding end optical area position and the brightness of lampshade corresponding main body optical area position tend to be consistent.

Description

Technical Field

[0001] This utility model relates to the field of lighting technology, specifically to a light guide based on a linear light guide, an optical system, and a vehicle light. Background Technology

[0002] To meet users' demands for automotive aesthetics, the importance of headlight design has become increasingly prominent, with headlights occupying a larger and larger area, both inside and outside the vehicle. As a result, a series of headlights with various shapes and large luminous areas have emerged.

[0003] To balance cost and lighting effects, the applicant had previously designed a design such as... Figure 1 and Figure 2 The light guide and vehicle headlight shown are described in which the light guide 1', which can emit light over a large area, is composed of linear light guides 111' arranged side by side. A light source is then placed at one end of each linear light guide 111', which can illuminate the headlight cover 4' over a large area.

[0004] However, please see Figure 3 and Figure 4 Not only does the upper half of the lampshade 4' (near the light source) with a larger luminous width have a dark area due to the smaller luminous angle of the linear light guide 111', resulting in poor uniformity of luminous brightness, but also the light propagation needs to change direction rapidly in the bending transition area between the upper and lower halves, which results in a significant strip-shaped dark area on the inner curved side and the lower half having lower brightness than the upper half, further reducing the uniformity of the headlight's luminous brightness.

[0005] Solving these problems is now a top priority. Utility Model Content

[0006] To address the technical problem of poor uniformity of light emission brightness at various locations in vehicle lights due to structural design issues with the light guide component, this utility model provides a light guide component, optical system, and vehicle light based on a linear light guide.

[0007] The technical solution is as follows:

[0008] The first aspect of this application relates to a light guide based on a linear light guide, comprising an integrally formed light guide body, the light guide body being composed of a main optical region and an end optical region bent and formed at one end of the main optical region. At least one linear light guide extending along its length direction is arranged side by side on the main optical region. Each linear light guide includes an incoming light mixing section and a first light emitting section connected sequentially along its length direction. The end of the first light emitting section away from the incoming light mixing section is bent and extends to the end optical region to form a second light emitting section. The inner side of each linear light guide has a main optical pattern distributed along its length direction. The outer side of each first light emitting section has at least one light-expanding rib arranged side by side, each light-expanding rib extending along the length direction of the first light emitting section. A supplementary light strip is formed on the inner side of the bending transition between the main optical region and the end optical region. The inner side of the supplementary light strip has a supplementary light optical pattern distributed along its length direction.

[0009] In some embodiments, the surface of the light-expanding rib has an arc-shaped structure.

[0010] In some embodiments, the main optical pattern is an optical tooth recessed on the inner side of the corresponding linear light guide, and the total width of all the light-amplifying ribs on the first light-emitting segment is greater than or equal to the width of the optical tooth directly opposite it.

[0011] In some embodiments, the supplementary light strip is a thin plate structure with a thickness less than that of the linear light guide.

[0012] In some embodiments, the supplementary light strip extends from the bend transition between the main optical region and the end optical region with a gradually decreasing width to the end of the main optical region away from the light mixing section.

[0013] In some embodiments, a plurality of anti-rotation mounting ribs protrude from the side edges of both the main optical region and the end optical region.

[0014] The second aspect of this application relates to an optical system, including the aforementioned light guide, a lampshade disposed on the outside of the light guide body, and light sources disposed one-to-one on the end face of each light-incoming mixing section away from the corresponding first light-emitting section.

[0015] A third aspect of this application relates to a vehicle lamp, including the aforementioned optical system.

[0016] By employing the above-mentioned light guide components, optical system, and vehicle headlights, firstly, by adding one or more light-expanding ribs to the outer side of the first light-emitting segment of each linear light guide in the light guide component, the light-emitting angle of each linear light guide can be effectively increased, eliminating the dark area caused by insufficient light-emitting angle of the linear light guide in the corresponding main optical area of ​​the lamp cover, and effectively improving the uniformity of the luminous brightness in the corresponding main optical area of ​​the lamp cover. Secondly, by adding a supplementary light strip on the inner curved side of the bend transition between the main optical area and the end optical area of ​​the light guide component, not only can some light be reflected to the area on the inner curved side of the corresponding main optical area of ​​the lamp cover through the supplementary light optical pattern, increasing the brightness of this area and avoiding the generation of strip dark areas, but also can guide more light to the end optical area, improving the brightness of the corresponding end optical area of ​​the lamp cover, making the brightness of the corresponding end optical area of ​​the lamp cover closer to the brightness of the corresponding main optical area, thereby improving the uniformity of the overall luminous brightness of the vehicle headlight. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an existing light guide component;

[0018] Figure 2 This is a schematic diagram of the structure of an existing optical system;

[0019] Figure 3 This is a schematic diagram of the existing light guide component after it has been illuminated.

[0020] Figure 4 A schematic diagram of the existing optical system after it has been illuminated;

[0021] Figure 5 This is a schematic diagram of the light guide component of this utility model from one perspective;

[0022] Figure 6 This is a structural schematic diagram of the light guide component of this utility model from another perspective;

[0023] Figure 7 This is a schematic diagram of the optical system of this utility model;

[0024] Figure 8 This is a schematic diagram of the light guide component of this utility model after it has been lit up;

[0025] Figure 9 This is a schematic diagram of the optical system of this utility model after it has been illuminated. Detailed Implementation

[0026] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0027] Example 1:

[0028] like Figure 5 , Figure 6 as well as Figure 8 As shown, a light guide based on a linear light guide mainly includes an integrally formed light guide body 1. Specifically, the light guide body 1 is preferably made of PC or PMMA through an injection molding process, which is inexpensive and durable.

[0029] The light guide body 1 consists of a main optical region 11 and an end optical region 12 bent and formed at one end of the main optical region 11. The end of the main optical region 11 away from the end optical region 12 is the light-inlet end. After the light enters the main optical region 11 from the light-inlet end, it is guided to the end optical region 12 through the main optical region 11. At least one linear light guide 111 extending along its length is provided side by side on the main optical region 11. In this embodiment, two linear light guides 111 are preferably provided, and adjacent linear light guides 111 are connected as one unit by a very thin connecting structure.

[0030] Each linear light guide 111 includes a light-introducing and light-mixing section 111a and a first light-emitting section 111b connected sequentially along its length. The first light-emitting section 111b extends from the end away from the light-introducing and light-mixing section 111a, bending to form a second light-emitting section 111c at the end optical region 12. The inner side of each linear light guide 111 has a main optical pattern 111d distributed along its length; that is, the inner sides of both the first light-emitting section 111b and the second light-emitting section 111c are provided with the main optical pattern 111d along their length. The end face of the light-introducing and light-mixing section 111a away from the first light-emitting section 111b is the light-introducing end face. Therefore, after the light enters the light mixing section 111a from its respective light-inlet end face, it is first fully mixed in the light mixing section 111a, and then passes through the first light-emitting section 111b and the second light-emitting section 111c in sequence. The light is then reflected by the main optical pattern 111d to the outside of the first light-emitting section 111b and the second light-emitting section 111c, that is, the first light-emitting section 111b and the second light-emitting section 111c are on the side away from the main optical pattern 111d.

[0031] In this embodiment, at least one parallel light-expanding rib 111e protrudes from the outer side of each of the first light-emitting segments 111b. The function of the light-expanding rib 111e is to increase the emission angle of each linear light guide. The number of light-expanding ribs 111e is determined according to actual needs. Therefore, please refer to... Figure 8 and Figure 9 By adding one or more light-expanding ribs 111e to the outside of the first light-emitting segment 111b of each linear light guide 111 of the light guide 1, the light-emitting angle of each linear light guide 111 can be effectively increased, thereby eliminating the dark area caused by insufficient light-emitting angle of the linear light guide 111 at the corresponding main optical area 11 position of the lampshade 4, and effectively improving the uniformity of the light emission brightness at the corresponding main optical area 11 position of the lampshade 4.

[0032] Further, please see Figure 5The surface of the light-expanding rib 111e is preferably an arc-shaped structure, which enables uniform light diffusion and improves uniformity.

[0033] Furthermore, Figure 5 and Figure 6 The main optical pattern 111d is an optical tooth formed in recess on the inner side of the corresponding linear light guide 111. The total width of all the light-expanding ribs 111e on the first light-emitting segment 111b is greater than or equal to the width of the optical tooth directly opposite it, so that more light can be diffused through the light-expanding ribs 111e, thereby improving the brightness and light emission uniformity of the headlight.

[0034] Furthermore, for the optical teeth located on the first light-emitting segment 111b, the optical teeth are evenly distributed along the length direction of the first light-emitting segment 111b; similarly, for the optical teeth located on the second light-emitting segment 111c, the optical teeth are evenly distributed along the length direction of the second light-emitting segment 111c; thereby effectively improving the light emission uniformity of the vehicle lamp.

[0035] Furthermore, the spacing between adjacent optical teeth on the first light-emitting segment 111b is greater than the spacing between adjacent optical teeth on the second light-emitting segment 111c, thereby increasing the brightness of the corresponding end optical area 12 position of the headlight, making the brightness of the corresponding end optical area 12 position of the headlight closer to the brightness of the corresponding main optical area 11 position, and improving the light emission uniformity of the headlight.

[0036] In this embodiment, each light-amplifying rib 111e extends along the length direction of the first light-emitting segment 111b. A supplementary light band 13 protrudes from the inner curved side of the transition between the main optical area 11 and the end optical area 12. The inner side of this supplementary light band 13 has supplementary light optical patterns 131 distributed along its length direction. Therefore, please refer to... Figure 8 and Figure 9 By adding a supplementary light strip 13 to the inner curved side of the transition between the main optical area 11 and the end optical area 12 of the light guide 1, not only can some light be reflected to the area of ​​the lampshade 4 corresponding to the inner curved side of the main optical area 11 through the supplementary light optical pattern 131, increasing the brightness of this area and avoiding the generation of strip-shaped dark areas, but also more light can be directed to the end optical area 12, improving the brightness of the lampshade 4 corresponding to the end optical area 12 position, making the brightness of the lampshade 1 at the end optical area 12 position close to the brightness of the corresponding main optical area 11 position, thereby improving the uniformity of the overall luminous brightness of the vehicle headlight. Furthermore, the supplementary light strip 13 has a structural strengthening effect on the inner curved side of the transition between the main optical area 11 and the end optical area 12, improving the structural strength of the light guide 1.

[0037] Further, please see Figure 5 and Figure 6The supplementary light strip 13 is preferably a thin plate structure with a thickness less than that of the linear light guide 111, which can reduce the amount of light entering from the adjacent linear light guide 111 and ensure that the brightness of the linear light guide 111 is close to that of other linear light guides 111, thereby improving the uniformity of the overall luminous brightness of the vehicle headlight.

[0038] Furthermore, the supplementary light strip 13 extends from the bending transition between the main optical region 11 and the end optical region 12 with a gradually decreasing width to the end of the main optical region 11 away from the light mixing section 111a, which can improve the uniformity of the supplementary light.

[0039] It should be noted that the supplementary light optical pattern 131 can be an ordered optical tooth structure, a randomly arranged optical tooth structure, or other common optical pattern structures. In this embodiment, the supplementary light optical pattern 131 is preferably an optical tooth structure that is uniformly distributed along the length of the supplementary light strip 13 to ensure the uniformity of light emission.

[0040] In this embodiment, several anti-rotation mounting ribs 14 are protruding from the side edges of the main optical area 11 and the end optical area 12 to facilitate the installation and positioning of the light guide 1 and ensure the light efficiency of the vehicle lamp.

[0041] Example 2:

[0042] Please see Figure 7 and Figure 9 An optical system includes a light guide as described in Embodiment 2, a lampshade 4 disposed on the outside of the light guide body 1, and light sources 3 disposed one-to-one on the end face of each light-incoming mixing section 111a away from the corresponding first light-emitting section 111b. This design ensures that all positions on the large light-emitting surface of the lampshade 4 are uniformly illuminated.

[0043] Furthermore, each light source 3 preferably uses at least one LED bead, and the light-emitting surface of each LED bead is directly facing the light-inlet end face of the corresponding linear light guide 111, which can ensure the stability of light emission and durability.

[0044] Example 3:

[0045] A vehicle light includes the optical system of embodiment 3. It can be used as various types of vehicle lights such as high-mounted brake lights, daytime running lights, exterior decorative lights, and ambient lights, and exhibits excellent light emission uniformity across all positions of the luminous surface.

[0046] 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 light guide based on a linear light guide, comprising an integrally formed light guide body, the light guide body being composed of a main optical region and an end optical region bent and formed at one end of the main optical region, wherein at least one linear light guide extending along its length direction is arranged side by side on the main optical region, each linear light guide comprising a light-incoming mixing section and a first light-emitting section connected sequentially along its length direction, wherein the end of the first light-emitting section away from the light-incoming mixing section is bent and extends to the end optical region to form a second light-emitting section, and the inner side of each linear light guide has a main optical pattern distributed along its length direction, characterized in that: The outer side of the first light-emitting segment has at least one light-expanding rib arranged in parallel, and each light-expanding rib extends along the length direction of the first light-emitting segment. A supplementary light strip is formed on the inner side of the bend transition between the main optical area and the end optical area, and the inner side of the supplementary light strip has supplementary light optical patterns distributed along its length direction.

2. The light guide based on a linear light guide according to claim 1, characterized in that: The surface of the light-expanding rib has an arc-shaped structure.

3. The light guide based on a linear light guide according to claim 1 or 2, characterized in that: The main optical pattern is an optical tooth formed in recesses on the inner side of the corresponding linear light guide, and the total width of all the light-expanding ribs on the first light-emitting segment is greater than or equal to the width of the optical tooth directly opposite it.

4. The light guide based on a linear light guide according to claim 1, characterized in that: The supplementary light strip is a thin plate structure with a thickness less than that of the linear light guide.

5. The light guide based on a linear light guide according to claim 1 or 4, characterized in that: The supplementary light strip extends from the bend between the main optical area and the end optical area, with its width gradually decreasing, to the end of the main optical area away from the light mixing section.

6. The light guide based on a linear light guide according to claim 1, characterized in that: Several anti-rotation mounting ribs protrude from the side edges of both the main optical area and the end optical area.

7. An optical system, characterized in that: It includes the light guide element as described in any one of claims 1-6, the lampshade disposed on the outside of the light guide element body, and the light source disposed one-to-one with the end face of each light-incoming and light-mixing section away from the corresponding first light-emitting section.

8. A vehicle light, characterized in that: Includes the optical system described in claim 7.

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