A light guide strip and a device having a light guide strip

Abstract

This utility model discloses a light guide strip and a device with a light guide strip. The light guide strip includes a light guide strip body, which is a rigid structure. The bottom surface of the light guide strip body has a light-incident area, and the top surface has a light-exiting area. The light-incident area and the light-exiting area are connected by a reflective area. A refractive groove is located in the light-incident area and is used to correspond to an LED light. Multiple refractive grooves are spaced apart along the extension direction of the light-incident area. The device with the light guide strip includes a housing, an LED light, and the aforementioned light guide strip. The LED light and the light guide strip are located inside the housing. The refractive grooves correspond to the LED light. The housing has a light-exiting part, and the light-exiting area corresponds to the light-exiting part. The light guide strip is characterized by its small thickness, small space occupation, and combination of optical performance and mechanical strength. It can be widely used in various devices, has good heat dissipation and light emission effects, is easy to use for long-term use, and is low in cost.

Description

Technical Field

[0001] This utility model belongs to the field of LED lighting technology, specifically relating to a light guide strip and a device having a light guide strip. Background Technology

[0002] Decorative lighting, advertising backlighting, automotive ambient lighting, architectural contour lighting, and other devices all include LED lights and light guides. The light guides are used to direct the LED light to the light-emitting area of ​​the device, thereby achieving the purpose of light emission.

[0003] The aforementioned devices typically use a single LED light source combined with a light guide strip to guide the light out. The light guide strip can only guide the LED light in a straight line, resulting in low luminous efficiency and poor light uniformity, easily leading to a significant decrease in brightness. Furthermore, if the light guide strip is made of a rigid material with strong resistance to deformation, it can easily create dark areas or bright spots in scenarios requiring bending. If the light guide strip is made of flexible silicone, although it is easy to bend and avoid dark areas or bright spots, its heat dissipation performance is poor, easily causing LED light decay over long-term operation, and it is also more expensive.

[0004] To address these issues, the device incorporates an LED array on one side of the light guide to improve light uniformity. The light guide is designed with a flexible light guide layer combined with a rigid protective layer to enhance deformability and heat dissipation, while also reducing costs. However, extracting all the LED light emitted from the side-lit LED array requires increasing the thickness of the light guide, resulting in a larger space requirement and making it difficult to fit into the device's existing limited space. Furthermore, the composite layer structure is prone to delamination during bending, affecting not only the light output but also significantly reducing the lifespan of the light guide. Utility Model Content

[0005] The purpose of this utility model is to disclose a light guide strip and a device with a light guide strip. The light guide strip has the characteristics of small thickness, small space occupation, and both optical performance and mechanical strength. It can be widely used in various devices, and has good heat dissipation and light emission effects. It is easy to use for a long time and has low cost.

[0006] To achieve the above objectives, the first aspect of this utility model discloses a light guide strip, comprising:

[0007] The light guide strip body is a rigid structure. The bottom surface of the light guide strip body is provided with a light-incident area, and the top surface of the light guide strip body is provided with a light-exit area. The light-incident area and the light-exit area are connected by a reflective area.

[0008] The refractive groove is located in the light-incident area and is used to correspond to the LED light setting. Multiple refractive grooves are provided at intervals along the extension direction of the light-incident area.

[0009] As an optional implementation, the bottom surface of the light guide strip body is an arched structure away from the light emission area, and a light entrance area is provided on one slope of the arched structure. Multiple refractive grooves are spaced apart in the light entrance area along the extension direction of one slope of the arched structure.

[0010] As an optional implementation, the light guide strip body is a straight structure or a bent structure. The bent structure includes at least one of an arc structure, an annular structure, and a wavy structure, and the refractive groove in the bent structure is located on the inner side of the bend and / or the outer side of the bend.

[0011] As an optional implementation, multiple refractive grooves are arranged at equal intervals along the extension direction of the incident light area.

[0012] As an optional implementation, the refractive groove is a V-shaped groove, which is set along the slope direction of one slope of the arch structure.

[0013] As an optional implementation, the refractive grooves are inclined and extend inclinedly along the slope direction of a slope of the arch structure, and multiple refractive grooves are inclined in the same direction.

[0014] As an optional implementation, the tilt angle of the refractive groove is 30-60°.

[0015] As an alternative implementation, the tilt angle of the multiple refractive grooves gradually changes along their setting direction.

[0016] As an optional implementation, the bottom of the V-groove has an arc-shaped structure.

[0017] The second aspect of this utility model discloses a device with a light guide strip, comprising: a housing, an LED lamp and the aforementioned light guide strip, wherein the LED lamp and the light guide strip are disposed inside the housing, a refractive groove is disposed corresponding to the LED lamp, the housing is provided with a light emitting part, and a light emitting area is disposed corresponding to the light emitting part.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] The light guide strip of this invention features multiple refractive grooves spaced apart in its light-incident area to correspond with LED lights. This allows the light emitted from the LED lights to be refracted multiple times before entering the light guide strip body. Combined with multiple reflections in the reflective area, this results in better uniformity of the light emitted from the light-out area and prevents attenuation of the device's light output brightness. Furthermore, since the light-incident area is located on the bottom surface of the light guide strip body, there is no need to increase the thickness of the light guide strip, resulting in a small footprint and wide applicability to various devices.

[0020] The light guide strip itself is a rigid structure, which has the characteristics of good heat dissipation, high mechanical strength and low cost. It is combined with multiple refractive grooves to reduce its resistance to deformation, thereby avoiding dark areas or bright spots caused by bending. This allows the light guide strip to have both optical performance and mechanical strength, and has a long service life and is not easily damaged. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments 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.

[0022] Figure 1 This is a first-view structural schematic diagram of the light guide strip of this utility model;

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

[0024] Figure 3 This is a structural schematic diagram of the light guide strip of this utility model from a second perspective;

[0025] Figure 4 yes Figure 3 Enlarged view at point B in the middle;

[0026] Figure 5 This is a structural schematic diagram of the light guide strip of this utility model from a third-view perspective;

[0027] Figure 6 yes Figure 5 Enlarged view of point C in the middle.

[0028] Explanation of key figure labels:

[0029] 1. Light guide strip body; 11. Light entrance area; 12. Light exit area; 13. Reflection area; 2. Refraction groove. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0032] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0033] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0034] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0035] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0036] Please see Figure 1-6 As shown in the figure, this application embodiment provides a light guide strip, including a light guide strip body 1. The light guide strip body 1 is a rigid structure, featuring low cost, good heat dissipation performance, and high mechanical strength. The bottom surface of the light guide strip body 1 has a light-incident area 11, and the top surface of the light guide strip body 1 has a light-exiting area 12. The light-incident area 11 and the light-exiting area 12 are connected by a reflective area 13. The light-incident area 11 corresponds to an LED light. The light emitted by the LED light enters the light guide strip body 1 through the light-incident area 11, is reflected multiple times by the reflective area 13, and then exits through the light-exiting area 12. The light-exiting area 12 is a light-transmitting structure, and the reflective area 13 can be a reflective coating to achieve total reflection of light, thereby ensuring that the light guide strip emits light only through the light-exiting area 12, preventing light leakage.

[0037] The light-incident area 11 is provided with refractive grooves 2, which are used to accommodate LED lights. Multiple refractive grooves 2 are spaced apart along the extension direction of the light-incident area 11. The arrangement of multiple refractive grooves 2 allows the light emitted by the LED lights to be refracted multiple times before entering the light guide strip body 1. Combined with the multiple reflections of the reflection area 13, the light emitted from the light-outceasing area 12 has good uniformity and avoids the attenuation of the light output brightness of the device.

[0038] Furthermore, the light-incident area 11 is located on the bottom surface of the light guide strip body, eliminating the need to increase the thickness of the light guide strip, thus occupying little space and making it widely applicable to various devices. At the same time, the rigid structure of the light guide strip body, combined with multiple refractive grooves 2, reduces its resistance to deformation, thereby avoiding dark areas or bright spots caused by bending. This allows the light guide strip to possess both optical performance and mechanical strength, and also has a long service life and is not easily damaged.

[0039] In this embodiment, the bottom surface of the light guide strip body 1 is an arched structure away from the light emission area 12. A light entrance area 11 is provided on one slope of the arched structure, and multiple refractive grooves 2 are spaced apart in the light entrance area 11 along the extension direction of one slope of the arched structure. The arched structure allows the light entrance area 11 and the refractive grooves 2 to be located on a slope, specifically on the side of the bottom surface of the light guide strip body 1. Compared to directly below the bottom surface, the LED lights can be arranged on the lower side of the light guide strip, rather than directly below it, thereby reducing the overall thickness of the device without increasing the thickness of the light guide strip, which is beneficial for reducing the device volume and improving space utilization.

[0040] The light guide strip body 1 has a straight or bent structure. The bent structure includes at least one of an arc shape, a ring shape, and a wave shape, and the refractive groove 2 in the bent structure is located on the inner and / or outer side of the bend. The shape of the light guide strip is set according to the device structure and the arrangement requirements of the LED lights. The light guide strip can be straight or bent, such as an arc bend, a semi-circular bend, a wave bend, a serpentine bend, a circular bend, an irregular ring bend, etc. When the light guide strip has a bent structure, regardless of the shape of the bend, its refractive groove 2 can be located on the inner or outer side of the bend, depending on the arrangement requirements of the LED lights. Figure 1 As shown, the light guide strip is bent into a ring structure, and the refractive groove 2 is located on the outside of the bend. At this time, the LED light is set at the bottom of the light guide strip, slightly to the outside. The light-emitting area 12 can be set opposite to the light-incoming area 11, or it can be set off-center. As long as the light-emitting area 12 and the light-incoming area 11 are connected by the reflection area 13, the light can be totally reflected in the reflection area 13 to avoid light leakage.

[0041] In this embodiment, multiple refractive grooves 2 are equally spaced along the extending direction of the light incident area 11. The equally spaced refractive grooves 2 can more uniformly refract the light emitted by the LED lamp, allowing the reflective area 13 to reflect the light more uniformly, thereby further improving the uniformity of the light emitted from the light emitting area 12 and ensuring the brightness of the emitted light, thus reducing light decay.

[0042] It should be noted that the number of refractive grooves 2 and the spacing between two adjacent refractive grooves 2 are not specifically limited, but are determined according to the requirements of light output brightness and light output uniformity. Different models of devices have different requirements for refractive grooves 2.

[0043] The refractive groove 2 is a V-shaped groove, which is set along the slope direction of the arch structure. The two inner sides of the V-shaped groove serve as refractive surfaces to refract the incident light, so that the light entering the light guide strip body 1 is more evenly dispersed, so that after being reflected by the reflection area 13, it can be more evenly emitted through the light emission area 12 and the brightness of the emitted light is improved.

[0044] The angle of the V-groove is not specifically limited, but depends on the light refraction requirements; different requirements correspond to different V-groove angles. Of course, in practical applications, the refraction groove 2 can also be set as a trapezoidal groove or an arc-shaped groove, as long as it can refract light to improve the uniformity of light output.

[0045] When the refractive groove 2 is a V-groove, the bottom of the V-groove has an arc-shaped structure. The curvature of the arc-shaped structure differs from the angle of the side of the V-groove, giving the V-groove different types of refractive structures. This facilitates more uniform refraction of light, further improving the uniformity of light output. The curvature of the arc-shaped structure depends on the processing difficulty and refraction requirements, and is not specifically limited here.

[0046] Based on the above structure, the refractive groove 2 is inclined and extends inclinedly along the slope direction of the arch structure, and multiple refractive grooves 2 are inclined in the same direction. Compared with the conventional structure of the refractive groove 2, the inclined arrangement of the refractive groove 2 in this embodiment is beneficial to further refract and disperse the light in different directions, thereby further improving the uniformity of light output.

[0047] The tilt angle of the refractive groove 2 is 30-60°. The tilt angle can be 30°, 35°, 40°, 45°, 50°, 55°, 60°, etc. Within this tilt angle range, the light emitted by the LED lamp can be refracted and dispersed to the greatest extent. Combined with the reflection effect of the reflection area 13, the light emitted from the light-emitting area 12 has high uniformity and brightness, thereby avoiding the attenuation of the emitted light from the device.

[0048] Furthermore, the tilt angles of the multiple refractive grooves 2 gradually change along their setting direction. The gradually changing tilt angles result in different dispersion of incident light after refraction by the refractive grooves 2 at different positions. Combined with the total internal reflection effect of the reflection area 13, this allows the light to be more dispersed in the light guide strip body 1, thereby further increasing the uniformity and brightness after emission from the light emission area 12, thus avoiding the problem of light intensity attenuation in the device.

[0049] Based on this, the light guide strip of this application embodiment utilizes the refractive groove 2 structure with gradually changing tilt angle to achieve uniform light output and light output brightness without the assistance of other optical elements. Combined with the rigid structure, the light guide strip has both optical performance and light output intensity. It is not only low in cost, but also convenient to process and produce, with a high yield rate, and is suitable for automated mass production.

[0050] This application embodiment also provides a device with a light guide strip, including: a housing, an LED light and the light guide strip described above, the LED light and the light guide strip are disposed inside the housing, the refractive groove 2 is disposed corresponding to the LED light, the housing is provided with a light emitting part, and the light emitting area 12 is disposed corresponding to the light emitting part.

[0051] The LED lights and light guide strips are installed inside the housing. The number of LED lights is set according to the light output requirements. Generally, multiple LED lights are spaced apart, and each LED light corresponds to the light input area 11. The light emitted by the LED lights is refracted by the refraction groove 2 and then enters the light guide strip body 1. After multiple total internal reflections through the reflection area 13, the light is emitted from the light output area 12 and then emitted out of the device through the light output section, so that the device has high light output uniformity and light output brightness.

[0052] The device with the light guide strip can be a common decorative lighting, advertising backlight, automotive ambient lighting, architectural outline lighting, etc. Only a few common applications are listed here, and it is not intended to limit the types of devices.

[0053] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A light guide strip, characterized in that, include: The light guide strip body is a rigid structure. The bottom surface of the light guide strip body is provided with a light incident area, and the top surface of the light guide strip body is provided with a light emitting area. The light incident area and the light emitting area are connected by a reflective area. A refractive groove is provided in the light-incident area and is used to correspond to the LED lamp. Multiple refractive grooves are provided at intervals along the extension direction of the light-incident area.

2. The light guide strip according to claim 1, characterized in that: The bottom surface of the light guide strip body is an arched structure away from the light emission area. The light entrance area is provided on one slope of the arched structure. A plurality of refractive grooves are spaced apart in the light entrance area along the extension direction of one slope of the arched structure.

3. The light guide strip according to claim 2, characterized in that: The light guide strip body is a straight structure or a bent structure. The bent structure includes at least one of an arc structure, an annular structure, and a wavy structure, and the refractive groove in the bent structure is located on the inner side of the bend and / or the outer side of the bend.

4. The light guide strip according to any one of claims 1-3, characterized in that: The plurality of the refractive grooves are arranged at equal intervals along the extension direction of the incident light area.

5. The light guide strip according to claim 2 or 3, characterized in that: The refractive groove is a V-shaped groove, which is set along the slope direction of one slope of the arch structure.

6. The light guide strip according to claim 5, characterized in that: The refractive grooves are inclined and extend inclinedly along the slope direction of one slope of the arch structure, and multiple refractive grooves are inclined in the same direction.

7. The light guide strip according to claim 6, characterized in that: The inclination angle of the refractive groove is 30-60°.

8. The light guide strip according to claim 6, characterized in that: The tilt angle of the plurality of refractive grooves gradually changes along their setting direction.

9. The light guide strip according to claim 5, characterized in that: The bottom of the V-shaped groove has an arc-shaped structure.

10. A device having a light guide strip, characterized in that, include: The housing, the LED lamp, and the light guide strip according to any one of claims 1-9, wherein the LED lamp and the light guide strip are disposed inside the housing, the refractive groove is disposed corresponding to the LED lamp, the housing is provided with a light emitting part, and the light emitting area is disposed corresponding to the light emitting part.

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