Light guide element and illumination module
By setting multiple light control areas on the light control surface of the light guide element, each area contains a light control microstructure with different depth diameter ratios, the problem of uneven lighting brightness in a large range of table lamps is solved, and uniform lighting and lighting comfort are improved over a large range.
Patent Information
- Application Number
- CN202422145577.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-02
AI Technical Summary
When existing desk lamps increase the lighting range, the lighting brightness of the central and edge areas is uneven, resulting in inconsistent light and darkness, which can easily cause eye fatigue and vision loss.
A number of light control areas are arranged on the light control surface of the light guide element, each area includes at least three light control microstructures with different depth diameter ratios. The light is refracted and reflected through these microstructures to form mixed light rays with different light output angles to achieve large-scale uniform illumination.
The lighting brightness uniformity over a large range is achieved, which reduces glare, reduces parts quantity, reduces costs, and improves lighting comfort and space lighting quality.
Smart Images
Figure CN223137692U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lighting, in particular to a light guide element and a lighting module. Background Art
[0002] Lighting devices, especially table lamps, are widely used in personal work, study, reading and other activities. They not only provide the necessary light source, but also play an important role in improving visual comfort and efficiency.
[0003] The existing table lamps can already meet the requirements of illuminance uniformity in their small lighting areas. However, when the lighting area needs to be increased, the distance between the table lamp and the illuminated surface often needs to be increased, resulting in a decrease in the illuminance of the central area of the illuminated surface, thus not meeting the lighting requirements. Moreover, in the case of an increased lighting area, the lighting brightness in the central area is inconsistent with that in the edge area, easily causing uneven brightness in the large lighting area, leading to discomfort symptoms such as eye fatigue and dryness, and further affecting eyesight.
[0004] In view of this, it is necessary to provide a light guide element and a lighting module to solve the above problems. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a light guide element that can achieve high-uniformity lighting in a large lighting area.
[0006] To achieve the above purpose, the utility model provides a light guide element applied to a lighting module, including: a light incident surface, a light control surface and a light exit surface. The light incident surface is configured to receive light, and the light control surface and the light exit surface are oppositely arranged; the light control surface includes a plurality of light control regions, and at least three light control microstructures are provided in each light control region, and different light control microstructures have different depth-to-diameter ratios; the light in the lighting module is incident on the light incident surface of the light guide element to form source light, and the source light forms mixed light with different light exit angles through refraction and / or reflection of different light control microstructures on the light control surface and then reaches the light exit surface.
[0007] Optionally, the at least three light control microstructures include: a first light control microstructure with a first depth-to-diameter ratio, a second light control microstructure with a second depth-to-diameter ratio, and a third light control microstructure with a third depth-to-diameter ratio, and the first depth-to-diameter ratio is greater than the second depth-to-diameter ratio, and the second depth-to-diameter ratio is greater than the third depth-to-diameter ratio.
[0008] Optionally, the value range of the first depth-to-diameter ratio is 0.6 - 1; the value range of the second depth-to-diameter ratio is greater than 0.4 - 0.7; the value range of the third depth-to-diameter ratio is 0.2 - 0.5.
[0009] Optionally, the source light forms a first light-emitting angle on the light-emitting surface after passing through the first light-controlling microstructure, the source light forms a second light-emitting angle on the light-emitting surface after passing through the second light-controlling microstructure, and the source light forms a third light-emitting angle on the light-emitting surface after passing through the third light-controlling microstructure, and the first light-emitting angle is smaller than the second light-emitting angle, and the second light-emitting angle is smaller than the third light-emitting angle.
[0010] Optionally, in each of the light-controlling regions, the first light-controlling microstructure, the second light-controlling microstructure, and the third light-controlling microstructure are arranged in the same area on the light-controlling surface.
[0011] Optionally, sizes of at least three of the light-controlling microstructures are all between 5um and 80um.
[0012] Optionally, a plurality of the light-controlling regions are continuously arranged in an array, and adjacent light-controlling regions are connected at a common edge of the light-controlling surface.
[0013] Optionally, each of the light-controlling regions has the same coverage area on the light-controlling surface, and the light-controlling regions are evenly distributed with different light-controlling microstructures according to their coverage areas.
[0014] Another object of the present invention is to provide a lighting module having the above light guide element.
[0015] To achieve the above object, the utility model provides a lighting module, comprising a light source and the above light guide element, wherein the light source is arranged on the side of the light guide element.
[0016] Optionally, a reflective element is further included, and the reflective element is arranged on a side of the light guide element away from the light emitting surface.
[0017] Compared with the prior art, the technical solution of the utility model has the following beneficial effects:
[0018] The light guide element of the present utility model is provided with a plurality of light control regions on the light control surface of the light guide element, and each light control region is provided with at least three light control microstructures having different depth-to-diameter ratios, so that any light entering the light guide element can be controlled by at least three light control microstructures, thereby making the light emitted from the light guide element more evenly distributed. Therefore, without arranging a common diffusion plate outside the light guide element, uniform light output can be achieved, and glare can be effectively reduced. Thus, on the premise of the same or better lighting effect, the number of parts can be effectively reduced, and the cost of the lighting module can be reduced. Moreover, since at least three light control microstructures having different depth-to-diameter ratios can control the light output of the source light irradiated on the light incident surface, the mixed light emitted from each light control region of the source light from the light output surface includes different light output angles. Without increasing the light output surface, a large-range lighting area can be achieved, and the lighting brightness of each area is uniform, so that the lighting module with such a light guide element has a large-range lighting area, and the lighting brightness of each area in the large-range lighting area is uniform, improving lighting comfort and enhancing the spatial lighting quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 is a schematic structural diagram of a lighting module according to a preferred embodiment of the present utility model;
[0020] Figure 2 is Figure 1 a schematic structural diagram of the light control surface of the light guide element in
[0021] Figure 3 is Figure 2 a schematic diagram of the depth-to-diameter ratio of the light control microstructure in
[0022] Figure 4 is Figure 2 a light path diagram of light emitted from the light guide element in
[0023] Figure 5 is Figure 2 the light distribution curve of the first light control microstructure in
[0024] Figure 6 is Figure 2 the light distribution curve of the second light control microstructure in
[0025] Figure 7 is Figure 2 the light distribution curve of the third light control microstructure in
[0026] Description of the reference numerals:
[0027] lighting module 100;
[0028] Light guide element 1, light incident surface 11, light exit surface 12, light control surface 13, light control area 14, first light control microstructure 141, second light control microstructure 142, third light control microstructure 143;
[0029] Light source 2;
[0030] Reflection element 3. Specific implementation manner
[0031] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0032] Here, it should be noted that in order to avoid obscuring the present utility model due to unnecessary details, only the structures and / or processing steps closely related to the solution of the present utility model are shown in the drawings, while other details less related to the present utility model are omitted.
[0033] In addition, it should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.
[0034] The present utility model provides a lighting fixture (not shown), which includes at least one lighting module 100. As Figure 1 shown, the lighting module 100 includes a light source 2 and a light guide element 1, and the light source 2 is disposed on the side surface of the light guide element 1. That is, in this embodiment, the lighting module 100 is a side-emitting lighting module 100. Of course, in other embodiments, the light source 2 may also be located on the upper surface or the lower surface of the light guide element 1, so that the lighting module 100 is a surface-emitting lighting module 100. Preferably, the lighting fixture is a table lamp. In other embodiments, the lighting fixture may also be other lighting devices such as a wall lamp or a ceiling lamp.
[0035] Please refer to Figure 1 shown, the light guide element 1 includes a light incident surface 11, a light control surface 13 and a light exit surface 12.
[0036] Among them, the light incident surface 11 is configured to receive light, the light control surface 13 and the light exit surface 12 are disposed opposite to each other, and the light incident surface 11 is connected to both the light control surface 13 and the light exit surface 12. That is, in this embodiment, the light incident surface 11 is disposed on the side surface of the light guide element 1. That is, the side surface of the light guide element 1 close to the light source 2 is the light incident surface 11. Of course, in other embodiments, the light incident surface 11 may also be on the side of the light control surface 13 of the light guide element 1, that is, the light incident surface 11 and the light control surface 13 are combined into one.
[0037] Optionally, the light control surface 13 and the light output surface 12 are respectively disposed on the upper and lower surfaces of the light guide element 1. With such an arrangement, the areas of the light control surface 13 and the light output surface 12 can be increased, so that the source light rays entering the light guide element 1 can fully act on the light control surface 13 and then be emitted through the light output surface 12 with a larger area, thereby improving the light control ability and the light output efficiency.
[0038] The light guide element 1 is made of a light-transmitting material or a semi-light-transmitting material. Preferably, the light guide element 1 is made of a transparent plastic material with a thickness of 2 to 5 mm. That is, the distance between the light control surface 13 and the light output surface 12 is 2 to 5 mm. The thickness of the light guide element 1 is approximately the same as the thickness of the light source 2. With such an arrangement, the thickness of the entire lighting module 100 can be made thinner, facilitating integration into devices that require a compact design. In addition, by setting the side surface as the light input surface 11, glare can be reduced.
[0039] Please refer to Figures 2 to 7 As shown, a plurality of light control regions 14 are provided on the light control surface 13. In this embodiment, the plurality of light control regions 14 are arranged continuously in an array, and adjacent light control regions 14 are connected by sharing a common side on the light control surface 13. That is, the plurality of light control regions 14 are closely and regularly arranged on the light control surface 13 of the light guide element 1. Moreover, the plurality of light control regions 14 cover the entire light control surface 13. In other embodiments, the plurality of light control regions 14 may also be arranged in a simple spaced array without sharing a common side.
[0040] Furthermore, the coverage area of each light control region 14 on the light control surface 13 is the same, and different light control microstructures are arranged on the light control regions 14 according to the average distribution of their coverage areas. With such an arrangement, the light control ability of each light control region 14 is balanced, and the light output on the light control surface 13 is more uniform.
[0041] In this embodiment, each light control region 14 has a regular hexagonal structure. Each light control region 14 includes at least three light control microstructures. The at least three light control microstructures are arranged on the inner surface of the light guide element 1 according to the arrangement of the plurality of light control regions 14. Among them, the inner surface of the light guide element 1 faces the light output surface 12. That is to say, the at least three light control microstructures in the light control region 14 are randomly distributed, but the plurality of light control regions 14 are closely arranged and joined together to form a hexagonal structure to cover the entire light control surface 13. In this way, any light rays entering the light guide element 1 can be controlled by at least three light control microstructures, so that the mixed light rays at any point on the light output surface 12 of the light guide element 1 include light rays with different light output angles, making the light rays emitted through the light guide element 1 more evenly distributed.
[0042] In other embodiments, at least three light control microstructures can also be combined in the light control region 14 to form other structures. For example, three light control microstructures with different depth-to-diameter ratios R can be combined in the light control region 14 to form six connected triangles, and two light control microstructures with each depth-to-diameter ratio R can be provided. Of course, it can be known that at least three light control microstructures can also be arranged in an interval array in the light control region 14 without the need to be combined.
[0043] Since the light control surface 13 of the light guide element 1 is provided with light control microstructures with different depth-to-diameter ratios R, so that any light entering the light guide element 1 can be controlled by at least three light control microstructures, thereby making the light emitted from the light guide element 1 more evenly distributed. Therefore, there is no need to arrange a common diffusion plate outside the light guide element 1 to achieve uniform light output, and glare can be effectively reduced. Thus, on the premise of the same or better lighting effect, the number of parts can be effectively reduced, and the cost of the lighting module 100 can be reduced.
[0044] The light control microstructures are all irregular in shape and are arranged in a concave-convex manner on the light control surface 13 of the light guide element 1. It is defined that the depth-to-diameter ratio R of the light control microstructure is equal to the depth H divided by the opening D, that is, R = H / D. The numerical values of the depth-to-diameter ratios R of at least three light control microstructures are different. The light control microstructures with different depth-to-diameter ratios R can focus and diffuse light to different degrees, which helps to achieve a more uniform light distribution. And the depth-to-diameter ratio R of the light control microstructure can be adjusted according to requirements to adapt to different lighting or display needs.
[0045] Please continue to refer to Figures 4 to 7 As shown, the light in the lighting module 100 is incident on the light incident surface 11 of the light guide element 1 to form source light rays. The source light rays are refracted and / or reflected by at least three light control microstructures on the light control surface 13 to form mixed light rays with different light output angles, and the mixed light rays are emitted from the light output surface 12. With such a setting, not only can the propagation path and distribution of light be precisely controlled by at least three light control microstructures with different depth-to-diameter ratios R, the light efficiency can be improved, but also the light rays can form different light output angles on the light output surface 12 after being affected by the light control microstructures with different depth-to-diameter ratios R. Without increasing the light output surface 12, a large lighting area can be achieved, and the lighting brightness of each area is uniform, so that the lighting module 100 with such a light guide element 1 has a large lighting area, and the lighting brightness of each area in the large lighting area is uniform, improving lighting comfort and enhancing the spatial lighting quality. In addition, through at least three light control microstructures with different depth-to-diameter ratios R, the distribution of light can be optimized, and the generation of concentrated hot spots can be reduced, thereby improving the thermal management of the lighting module 100.
[0046] The source light forms different light-emitting angles on the light-emitting surface 12 after being refracted and / or reflected by at least three light-control microstructures, and the magnitude of the depth-to-diameter ratio R of the light-control microstructures is negatively correlated with the magnitude of the light-emitting angles. That is to say, the source light can deflect in different directions on different light-control microstructures, and thus has different projection ranges. When the depth-to-diameter ratio R of the light-control microstructure is relatively large, the light-emitting angle on the light-emitting surface 12 is smaller, and the area where the light is concentrated is smaller. When the depth-to-diameter ratio R of the light-control microstructure is relatively small, the light-emitting angle on the light-emitting surface 12 is larger, and the area where the light is concentrated is larger.
[0047] In this embodiment, each light-control region 14 includes three light-control microstructures with different depth-to-diameter ratios R. As Figure 2 shown, in each hexagonal light-control region 14, the three light-control microstructures with different depth-to-diameter ratios R are evenly distributed. That is, the arrangement areas of the three light-control microstructures with different depth-to-diameter ratios R on the light-control region 14 are the same. Such an arrangement enables the light entering each light-control region 14 to be controlled by the three light-control microstructures, so that the light emitted from the light guide element is more evenly distributed.
[0048] The three light-control microstructures with different depth-to-diameter ratios R include: a first light-control microstructure 141 with a first depth-to-diameter ratio R1, a second light-control microstructure 142 with a second depth-to-diameter ratio R2, and a third light-control microstructure 143 with a third depth-to-diameter ratio R3. And, the first depth-to-diameter ratio R1 is greater than the second depth-to-diameter ratio R2, and, the second depth-to-diameter ratio R2 is greater than the third depth-to-diameter ratio R3. Of course, in other embodiments, each light-control region 14 may also include four or more light-control microstructures with different depth-to-diameter ratios R.
[0049] Furthermore, the value range of the first depth-to-diameter ratio R1 is 0.6 < R1 < 1, the value range of the second depth-to-diameter ratio R2 is 0.4 < R2 < 0.7, and the value range of the third depth-to-diameter ratio R3 is 0.2 < R5 < 0.5.
[0050] By setting the ranges of the depth-to-diameter ratios R of the three light-control microstructures to partially overlap, it is possible to make the light-emitting angles of the light on the three light-control microstructures partially overlap, so that the transition between different light-emitting angles is smooth, the light emission is continuous, and the light-emitting effect is good.
[0051] Please refer to Figures 5 to 7 shown, the source light forms a first light-emitting angle on the light-emitting surface 12 after passing through the first light-control microstructure 141, the source light forms a second light-emitting angle on the light-emitting surface 12 after passing through the second light-control microstructure 142, the source light forms a third light-emitting angle on the light-emitting surface 12 after passing through the third light-control microstructure 143, and, the first light-emitting angle is less than the second light-emitting angle, and the second light-emitting angle is less than the third light-emitting angle.
[0052] Further, the range of the first light-emitting angle is 80° to 115°, the range of the second light-emitting angle is 110° to 145°, and the range of the third light-emitting angle is 125° to 170°. In this embodiment, the first light-emitting angle is about 115°, the second light-emitting angle is about 135°, and the third light-emitting angle is about 160°.
[0053] When the lamp is a table lamp, after the light source 2 passes through the first light control microstructure 141 with a relatively large depth-to-diameter ratio R (0.6 < R1 < 1), the first light-emitting angle (for example, about 115°) on the light-emitting surface 12 can just concentrate most of the light in the area with a diameter of 300 mm below the table lamp, thereby improving the brightness of the reading and writing center area. After the light source 2 passes through the second light control microstructure 142 with a medium depth-to-diameter ratio R (0.4 < R2 < 0.7), the second light-emitting angle (for example, about 135°) on the light-emitting surface 12 can just concentrate most of the light in the area with a diameter of 500 mm below the table lamp, improving the illumination uniformity of the reading and writing operation area. After the light source 2 passes through the third light control microstructure 143 with a relatively small depth-to-diameter ratio R (0.2 < R3 < 0.5), the third light-emitting angle (for example, about 160°) on the light-emitting surface 12 can just direct most of the light to the area outside the reading operation area below the table lamp. By using the light control microstructures with three depth-to-diameter ratios R, without increasing the light-emitting surface 12 of the table lamp, a large illumination area of the table lamp can be realized, and the illumination brightness of each area is uniform, greatly improving the space illumination quality, realizing a large illumination area and high-uniform illumination, and improving the illumination comfort.
[0054] In this embodiment, the number of the first light control microstructures 141, the number of the second light control microstructures 142, and the number of the third light control microstructures 143 in each light control area 14 are the same. The covered area of each light control area 14 on the light control surface 13 is the same. That is, the layout areas of the first light control microstructure 141, the second light control microstructure 142, and the third light control microstructure 143 on the light control surface 13 are the same. Such a setting makes the light evenly distributed in the light guide element 1, so that the light with different light-emitting angles is evenly distributed, avoiding too strong or too weak light in some areas. Of course, in other embodiments, the quantity ratio of the light control microstructures with three different depth-to-diameter ratios R can be designed according to requirements, so that different light-emitting angles and light-emitting brightness can be designed according to requirements.
[0055] Further, the sizes of the first light control microstructure 141, the second light control microstructure 142, and the third light control microstructure 143 are all 5 μm to 80 μm. That is, the size of the opening D of the first light control microstructure 141, the second light control microstructure 142, and the third light control microstructure 143 is 5 μm to 80 μm.
[0056] In this embodiment, the lighting module 100 further includes a reflection element 3. The reflection element 3 is disposed on the side of the light guide element 1 away from the light-emitting surface 12 and is stacked with the light guide element 1, as Figure 1 shown. Since the light guide element 1 is made of transparent plastic material, part of the light will pass through the light control surface 13 of the light guide element 1 and emit to the outside of the light guide element 1. Therefore, by providing the reflection element 3, the light passing through the light control surface 13 of the light guide element 1 can be recycled to improve the light energy utilization rate. Moreover, after this part of the light enters the light guide element 1, it can pass through the action of the multiple light control microstructures on the light control surface 13 again, so as to form light rays at different angles on the light-emitting surface 12 of the light guide element 1, improving the lighting brightness and uniformity.
[0057] In summary, by providing multiple light control regions 14 on the light control surface 13 of the light guide element 1 of the present utility model, each light control region 14 includes three light control microstructures with different depth-to-diameter ratios R, so that any light entering the light guide element 1 can be controlled by at least three light control microstructures, thereby making the light emitted from the light guide element 1 more evenly distributed. Therefore, without arranging a common diffusion plate outside the light guide element 1, uniform light emission can be achieved, and glare can be effectively reduced. Thus, on the premise of the same or better lighting effect, the number of parts can be effectively reduced, and the cost of the lighting module 100 can be reduced. And because at least three light control microstructures with different depth-to-diameter ratios can control the outgoing light of the source light irradiated on the light-incident surface 11, the mixed light emitted from the light-emitting surface 12 of each light control region 14 of the source light includes different outgoing angles. Without increasing the light-emitting surface 12, a large-range lighting area can be achieved, and the lighting brightness of each area is uniform. The lighting module 100 with such a light guide element 1 has a large-range lighting area, and the lighting brightness of each area in the large-range lighting area is uniform, improving lighting comfort and enhancing the space lighting quality.
[0058] The above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present utility model.
Claims
1. A light guide element, applied to an illumination module, characterized in that Comprising: An incident light surface (11), a light control surface (13), and an outgoing light surface (12). The incident light surface (11) is configured to receive incident light, and the light control surface (13) and the outgoing light surface (12) are disposed opposite to each other; a plurality of light control regions (14) are included on the light control surface (13), and at least three light control microstructures are provided in each light control region (14), and different light control microstructures have different depth-to-diameter ratios; the light in the lighting module (100) is incident on the incident light surface (11) of the light guiding element to form source light, and the source light forms mixed light with different outgoing light angles after being refracted and / or reflected by different light control microstructures on the light control surface (13) and reaches the outgoing light surface (12).
2. The light guide element according to claim 1, characterized in that, The at least three light control microstructures include: a first light control microstructure (141) having a first depth-to-diameter ratio, a second light control microstructure (142) having a second depth-to-diameter ratio, and a third light control microstructure (143) having a third depth-to-diameter ratio, and the first depth-to-diameter ratio is greater than the second depth-to-diameter ratio, and the second depth-to-diameter ratio is greater than the third depth-to-diameter ratio.
3. The light guide element according to claim 2, characterized in that, The value range of the first depth-to-diameter ratio is 0.6 to 1; the value range of the second depth-to-diameter ratio is 0.4 to 0.7; the value range of the third depth-to-diameter ratio is 0.2 to 0.
5.
4. The light guide element according to claim 2, characterized in that, The source light forms a first outgoing light angle on the outgoing light surface (12) after passing through the first light control microstructure (141), the source light forms a second outgoing light angle on the outgoing light surface (12) after passing through the second light control microstructure (142), and the source light forms a third outgoing light angle on the outgoing light surface (12) after passing through the third light control microstructure (143), and the first outgoing light angle is less than the second outgoing light angle, and the second outgoing light angle is less than the third outgoing light angle.
5. The light guide element according to claim 2, characterized in that, The arrangement areas of the first light control microstructure (141), the second light control microstructure (142), and the third light control microstructure (143) on the light control surface (13) are the same.
6. The light guide element according to claim 1, characterized in that, The size of each light control microstructure is 5um to 80um.
7. The light guide element according to claim 1, characterized in that, The plurality of light control regions (14) are arranged continuously in an array, and adjacent light control regions (14) are connected by a common side on the light control surface (13).
8. The light guide element according to claim 7, wherein The covering areas of each light control region (14) on the light control surface (13) are the same, and different light control microstructures are arranged by evenly distributing according to their covering areas in the light control region (14).
9. A lighting module, characterized in that, Comprising a light source (2) and a light guiding element (1) according to any one of claims 1 to 8, and the light source (2) is disposed on the side surface of the light guiding element (1).
10. The lighting module according to claim 9, characterized in that, Further comprising a reflection element (3), and the reflection element (3) is disposed on the side of the light guiding element (1) away from the outgoing light surface (12).