Fill light and electronic device

Abstract

A fill light (100), comprising a light-emitting light source (110) and a light distribution member (120), wherein the light distribution member (120) has a light incident surface (121) and a light emergent surface (122) arranged opposite to each other, and the light-emitting light source (110) is located on the side where the light incident surface (121) of the light distribution member (120) is located; a reflective surface (123) is formed on the circumferential side wall of the light distribution member (120); the light incident surface (121) comprises a first light incident structure (1211), a second light incident structure (1212), and a third light incident structure (1213), the first light incident structure (1211) is an arc-shaped convex surface, and first-angle light of the light emitting light source (110) passes through the first light incident structure (1211) and is then emitted from the light emergent surface (122); the second light incident structure (1212) comprises a plurality of annular teeth (1212a), the plurality of annular teeth (1212a) are continuously arranged in a direction from the first light incident structure (1211) to the third light incident structure (1213), and second-angle light of the light-emitting light source (110) passes through the second light incident structure (1212) and is then emitted from the light emergent surface (122); third-angle light of the light-emitting light source (110) passes through the third light incident structure (1213), is incident to the reflective surface (123), and is reflected by the reflective surface (123) and then emitted from the light emergent surface (122). Also provided is an electronic device.

Description

Fill lights and electronic equipment

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411200437.X, filed on August 29, 2024, entitled “Supplemental Light and Electronic Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application belongs to the field of optical device technology, specifically relating to a fill light and electronic device. Background Technology

[0004] As the imaging capabilities of mobile phones and other electronic devices continue to improve, the demand for taking photos with these devices is also increasing, leading to a wide variety of shooting scenarios. However, in low-light environments and nighttime scenes, it's difficult to capture clear photos, and video recording or live streaming also offers a less than ideal experience. Therefore, some electronic devices are equipped with supplemental lighting to ensure good image quality in low-light and nighttime conditions.

[0005] In related technologies, supplementary lighting includes a light source that emits light when lit, thereby enabling supplementary lighting operations.

[0006] However, the light emitted by the light source in the related technology has a large divergence angle, resulting in a large illumination range but also low illuminance and a short illumination distance. Therefore, the related technology's fill lights are unable to achieve long-distance illumination, thus reducing their illumination performance. Summary of the Invention

[0007] This application discloses a supplementary lighting lamp, including a light source and a light distribution component; the light distribution component has a light-incident surface and a light-emitting surface disposed opposite to each other, the light source is located on the side where the light-incident surface of the light distribution component is located; a reflective surface is formed on the circumferential sidewall of the light distribution component; the light-incident surface includes a first light-incident structure, a second light-incident structure and a third light-incident structure, the second light-incident structure is disposed around the first light-incident structure, the third light-incident structure is disposed around the second light-incident structure, and the reflective surface is disposed around the third light-incident structure; the first light-incident structure, the second light-incident structure, the third light-incident structure and the reflective surface are disposed around the third light-incident structure; the first light-incident structure, the second light-incident structure, the third light-incident structure and the reflective surface are disposed around the third light-incident structure; The light-emitting surfaces are all rotationally symmetrical about the central optical axis of the light source; the first light-incident structure is an arc-shaped convex surface, and the first angle light rays of the light source are emitted from the light-emitting surface after passing through the first light-incident structure; the second light-incident structure includes a plurality of annular teeth, which are continuously arranged in the direction from the first light-incident structure to the third light-incident structure, and the second angle light rays of the light source are emitted from the light-emitting surface after passing through the second light-incident structure; the third angle light rays of the light source are incident on the reflective surface through the third light-incident structure, and are emitted from the light-emitting surface after being reflected by the reflective surface.

[0008] In this embodiment, the first light-incident structure is an arc-shaped convex surface. This arc-shaped convex surface has a precise angle-contraction effect on the small-angle diverging light rays from the light source. As the divergence angle of the light source increases, the control precision of the arc-shaped convex surface on the large-angle light rays deteriorates. Therefore, a second light-incident structure is provided outside the first light-incident structure. The second light-incident structure includes multiple annular teeth, which can effectively constrict light rays with larger divergence angles. Furthermore, as the divergence angle of the light source continues to increase, the control precision of the annular teeth also deteriorates. At this point, the third light-incident structure and the reflective surface are used to regulate and constrict ultra-large-angle light rays. In the scheme disclosed in this application, the light distribution component has multiple light distribution zones. Each light distribution zone uses a different light distribution structure for light rays at different angles. Therefore, the light distribution component can concentrate light energy to the maximum extent, thereby improving the illumination of the supplementary light and achieving long-distance supplementary lighting, thus improving the supplementary lighting performance of the supplementary light. Attached Figure Description

[0009] Figures 1 to 3 are schematic diagrams of the structure of the supplementary lighting disclosed in the embodiments of this application;

[0010] Figure 4 is a partial cross-sectional view of the light distribution component of the supplementary light disclosed in an embodiment of this application;

[0011] Figure 5 is a schematic diagram of the structure of the light distribution component of the supplementary light disclosed in the embodiment of this application;

[0012] Figure 6 is a cross-sectional view of the light distribution component of the supplementary light disclosed in the embodiment of this application;

[0013] Figure 7 is a schematic diagram of the structure of some components of the electronic device disclosed in the embodiments of this application;

[0014] Figure 8 is an exploded view of some components of the electronic device disclosed in an embodiment of this application.

[0015] Explanation of reference numerals in the attached figures: 100-Supplemental light, 110-Light source, 120-Light distribution component, 1201-Main body, 1202-Annular extension, 121-Light incident surface, 1211-First light incident structure, 1212-Second light incident structure, 1212a-Annular tooth, 1212b-Gate groove, 1212c-Tooth tip, 1213-Third light incident structure, 122-Light emitting surface, 123-Reflective surface, 1231-Arc-shaped reflective surface, 124-Light guide groove, 130-Liquid crystal dimming film, 140-Transmitting lens, 141-Lens body, 142-Protrusion, a-First curve, b-First straight line, c-Second curve, d-Second straight line, w-Central optical axis, 200-Housing shell, 210-Mounting hole, 211-Gap, 310-First adhesive layer, 320-Buffer layer, 330-Second adhesive layer. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0017] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0018] The supplementary lighting and electronic equipment provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0019] Please refer to Figures 1 to 8. This application discloses a supplementary light 100, which is used in electronic devices. The disclosed supplementary light 100 includes a light source 110 and a light distribution component 120.

[0020] The light distribution element 120 has an incident light surface 121 and an exit light surface 122 arranged opposite to each other, and the light source 110 is located on the side where the incident light surface 121 of the light distribution element 120 is located. At this time, the light emitted by the light source 110 enters the light distribution element 120 through the incident light surface 121, and then exits through the exit light surface 122. The light source 110 can be a semiconductor light-emitting diode (LED) lamp, a high-pressure sodium lamp, a metal halide lamp, etc. Of course, the light source 110 of the supplementary lighting 100 can also be other structures, which are not limited herein.

[0021] The circumferential sidewall of the light distributor 120 has a reflective surface 123 formed thereon. Here, the circumferential sidewall refers to the outer sidewall of the light distributor 120, so the outer sidewall of the light distributor 120 has a reflective surface 123 formed thereon. The reflective surface 123 can reflect the light rays incident on the outer sidewall of the light distributor 120.

[0022] The light-incident surface 121 includes a first light-incident structure 1211, a second light-incident structure 1212, and a third light-incident structure 1213. The second light-incident structure 1212 is arranged around the first light-incident structure 1211, the third light-incident structure 1213 is arranged around the second light-incident structure 1212, and the reflecting surface 123 is arranged around the third light-incident structure 1213. The first light-incident structure 1211, the second light-incident structure 1212, the third light-incident structure 1213, and the reflecting surface 123 are all rotationally symmetrical about the central optical axis w of the light-emitting source 110. Here, the central optical axis w refers to the optical axis at the center of the light-emitting source 110 or the physical center line of the light-emitting source 110.

[0023] At this time, the first light-incident structure 1211, the second light-incident structure 1212, and the third light-incident structure 1213 are arranged along the center of the light-incident surface 121 towards its edge. Since the first light-incident structure 1211 is the central region of the light-incident surface 121, small-angle light rays from the light-emitting source 110 can enter the first light-incident structure 1211. Along the direction from the center of the light-incident surface 121 towards its edge, the angle of the light emitted by the light-emitting source 110 gradually increases. Here, the light rays entering the first light-incident structure 1211 can be denoted as the first-angle light rays, the light rays entering the second light-incident structure 1212 can be denoted as the second-angle light rays, and the light rays entering the third light-incident structure 1213 can be denoted as the third-angle light rays. At this time, the divergence angle of the first-angle light rays is smaller than that of the second-angle light rays, and the divergence angle of the second-angle light rays is smaller than that of the third-angle light rays.

[0024] Specifically, the first light-incident structure 1211 is an arc-shaped convex surface that protrudes towards the side of the light-emitting source 110. At this time, the first angle light rays from the light-emitting source 110 pass through the first light-incident structure 1211 and are emitted from the light-emitting surface 122. The arc-shaped convex surface has a relatively precise light-angle contraction effect on small-angle divergent light rays. Therefore, by setting the first light-incident structure 1211 as an arc-shaped convex surface, small-angle light rays can be better contracted. This first light-incident structure 1211 forms the first light-distribution area of ​​the light-distributing component 120. As shown in region A in Figure 1, the first light-distribution area can be obtained by rotating region A around the central optical axis w.

[0025] As the divergence angle of the light from the light source 110 further increases, the control precision of the arc-shaped convex surface deteriorates, making it difficult to control the light. At this point, the second light-incident structure 1212 includes multiple annular teeth 1212a, which are continuously arranged from the first light-incident structure 1211 to the third light-incident structure 1213. That is, the multiple annular teeth 1212a are continuously arranged along the center of the light-incident surface 121 towards its edge. The second-angle light from the light source 110 is emitted from the light-exiting surface 122 after passing through the second light-incident structure 1212. Since each annular tooth 1212a has two opposing sidewalls, the light first enters through one sidewall, which refracts the incident light. The refracted light is then reflected by the other sidewall. Therefore, through one refraction and one reflection, light with a large divergence angle can be effectively controlled. The second light-incident structure 1212 here forms the second light-distribution area of ​​the light-distributing element 120, as shown in region B in Figure 1. The second light-distribution area is obtained by rotating region B around the central optical axis w. The second light-distribution area here is a ring structure that surrounds the first light-distribution area.

[0026] As the divergence angle of the light from the light source 110 continues to increase, the control accuracy of the annular tooth 1212a deteriorates. Therefore, a reflective structure is needed for large-angle reflection. Thus, the third-angle light from the light source 110 is incident on the reflective surface 123 via the third incident light structure 1213, and after reflection by the reflective surface 123, it exits from the light-emitting surface 122. The third incident light structure 1213 and the reflective surface 123 together form the third light distribution area of ​​the light distribution element 120. As shown in region C in Figure 1, the third light distribution area is obtained by rotating region C around the central optical axis w. This third light distribution area is an annular structure that surrounds the second light distribution area. The third light distribution area mainly relies on the large-area annular reflective surface 123 to constrict the light; the structure of this third light distribution area is similar to a reflective bowl structure. The surface shape of the three incident light structures can be the same as the first incident light structure 1211 or the second incident light structure 1212, or the third incident light structure can be planar. The surface shape of the third incident light structure 1213 is not limited in this paper.

[0027] In the embodiments disclosed in this application, the first light-incident structure 1211 is an arc-shaped convex surface. The arc-shaped convex surface has a relatively precise angle-contraction effect on the small-angle diverging light rays of the light-emitting light source 110. When the light divergence angle of the light source 110 increases, the control accuracy of the arc-shaped convex surface on the large-angle light rays will deteriorate. Therefore, a second light-incident structure 1212 is provided on the outside of the first light-incident structure 1211. The second light-incident structure 1212 includes multiple annular teeth 1212a, which can effectively constrict light rays with larger divergence angles. Furthermore, when the light divergence angle of the light source 110 continues to increase, the control accuracy of the annular teeth 1212a will also deteriorate. At this time, the ultra-large-angle light rays are controlled and constricted through the third light-incident structure 1213 and the reflecting surface 123. Therefore, the light distribution element 120 disclosed in this application has multiple light distribution zones. Each light distribution zone adopts a different light distribution structure for light at different angles, so that light with different degrees of divergence can achieve a relatively consistent contraction effect. Therefore, the light distribution element 120 can concentrate light energy to the maximum extent, thereby improving the illumination of the supplementary light lamp 100 and realizing long-distance supplementary light of the supplementary light lamp 100, thus improving the supplementary light performance of the supplementary light lamp 100.

[0028] As shown in Figure 3, each light distribution zone adopts a different light distribution structure for light at different angles, so that light with different degrees of divergence can achieve a relatively consistent contraction effect. Therefore, the supplementary light 100 disclosed in this application has a high illuminance.

[0029] In the above scheme, the first light-incident structure 1211, the second light-incident structure 1212, and the third light-incident structure 1213 can be disposed on the same plane. In this case, a large distance needs to be maintained between the light-distributing element 120 and the light-incident surface 121 to meet the light-incident requirements of the first light-incident structure 1211, the second light-incident structure 1212, and the third light-incident structure 1213. In this scheme, the third light-incident structure 1213 has the greatest impact on light input. Therefore, to meet the light-incident requirements of the third light-incident structure 1213, a large distance needs to be maintained between the light-distributing element 120 and the light source 110, which inevitably results in a larger overall size of the supplementary lighting lamp 100.

[0030] Based on this, in another alternative solution, a light guide groove 124 can be formed on the side of the light distribution component 120 opposite to the light incident surface 121. The light guide groove 124 is disposed opposite to the light source 110, and a first light incident structure 1211 and a second light incident structure 1212 are formed on the bottom surface of the light guide groove 124. A third light incident structure 1213 is formed on the inner side surface of the light guide groove 124, and the third light incident structure 1213 can be disposed opposite to the reflective surface 123.

[0031] In the specific operation, a light guide groove 124 is partially carved out of the light distribution component 120. At this time, the light-emitting surface of the light source 110 can be positioned flush with the opening of the light guide groove 124. The light source 110 can then directly illuminate the first light-incident structure 1211 and the second light-incident structure 1212. Simultaneously, the third light-incident structure 1213 can surround the light source 110, thereby meeting the light-incident requirements of the third light-incident structure 1213.

[0032] In this design, the overall thickness of the light distributor 120 remains unchanged; only a light guide groove 124 is created in a localized area to retract the light source 110 towards the light distributor 120 by a certain distance, thereby reducing the stacking thickness between the light distributor 120 and the light source 110. Simultaneously, this design meets the light input requirements of the first light-input structure 1211, the second light-input structure 1212, and the third light-input structure 1213. Therefore, this design can both reduce the thickness of the supplementary light 100 and ensure that the supplementary light 100 has good optical performance.

[0033] In another alternative scheme, the distance between any point on the reflecting surface 123 and the central optical axis w of the light source 110 can be considered a first distance. This first distance gradually decreases along the direction from the light-emitting surface 122 to the light-incident surface 121. Here, the first distance refers to the perpendicular distance from any end of the reflecting surface 123 to the central optical axis w. Since the reflecting surface 123 has a rotationally symmetric structure, all points on a circle of the same radius on the reflecting surface 123 have the same first distance.

[0034] In this scheme, the reflecting surface 123 is a tapered structure along the direction from the light-emitting surface 122 to the light-incident surface 121. That is, the edge area of ​​the end of the reflecting surface 123 facing the light-emitting surface 122 is larger than the edge area of ​​the end of the reflecting surface 123 facing the light-incident surface 121. Therefore, the reflecting surface 123 is a trumpet-shaped structure. The surface of the trumpet-shaped structure can increase the reflection angle of light reflected to the outer edge, thereby further improving the light reflection performance and further improving the light distribution performance of the third light distribution area.

[0035] In another alternative scheme, the reflective surface 123 is formed by rotating the first curve a around the central optical axis w of the light source 110. Here, the first curve a is the surface profile of the reflective surface 123, which refers to the line segment that forms a specified contour after rotating around a certain position. As shown in Figure 2, which is a cross-sectional view of the light distribution element 120, the curve formed by points D and C is the first curve a. The surface profile of the reflective surface 123 in this application is obtained by rotating the first curve a around the central optical axis w. The first curve a can be a Bézier curve or a spline curve. Of course, the first curve a can also be other structural curves, which are not limited herein.

[0036] In this scheme, the reflective surface 123 is obtained by rotating the first curve a around the central optical axis w. Therefore, by optimizing the shape of the first curve a, the surface shape of the reflective surface 123 can be further optimized, thereby achieving precise light guiding and further improving the optical performance of the supplementary light 100.

[0037] Optionally, the first curve a can be a Bézier curve. A Bézier curve is a mathematical curve used in two-dimensional graphics applications. It is a smooth curve drawn based on the coordinates of four arbitrary points. The direction and curvature of the curve can be adjusted by controlling the four points on the curve (the starting point, the ending point, and two mutually separated midpoints).

[0038] The first curve 'a' is a Bézier curve, which is determined by parameters such as the starting point position, the starting point tangent angle, the starting point tangent length, the ending point position, the ending point tangent angle, and the ending point tangent length. The specific parameter values ​​of the first curve 'a' can be flexibly selected according to actual needs, and this article does not impose any restrictions.

[0039] In one specific scheme, as shown in Figure 2, the parameters of the first curve a are shown in Table 1 below:

[0040] Table 1

[0041] As shown in the coordinate system in Figure 2, the origin of the coordinate system is the midpoint of the emitting surface of the light source 110. The coordinate parameters in Table 1 above can determine the first curve a. By rotating the first curve a around the central optical axis w, the surface profile of the reflecting surface 123 can be obtained. Of course, the parameters of the first curve a, such as the starting point, starting point tangent angle, starting point tangent length, ending point, ending point tangent angle, and ending point tangent length, are not limited to the data in Table 1. With the starting point coordinates and the ending point coordinates unchanged, the data parameters of the starting point tangent angle, starting point tangent length, ending point tangent angle, and ending point tangent length can fluctuate within ±10%.

[0042] In the above embodiments, a third light-incident structure 1213 is formed on the inner side of the light-guiding groove 124. This third light-incident structure 1213 can be an annular structure. Specifically, the third light-incident structure 1213 can be formed by rotating a first straight line b around the central optical axis w of the light-emitting source 110. In this case, the third light-incident structure 1213 is an annular plane. The first straight line b is the surface profile of the third light-incident structure 1213. As shown in Figure 2, the straight line formed by points A and B is the first straight line b. The surface profile of the third light-incident structure 1213 in this application is obtained by rotating the first straight line b around the central optical axis w. It is common knowledge that two points determine a straight line; therefore, by determining the two endpoints of the first straight line b, the first straight line b can be determined.

[0043] In this scheme, the third light-incident structure 1213 is obtained by rotating the first straight line b around the central optical axis w. Therefore, by optimizing the slope of the first straight line b, the third light-incident structure 1213 can be further optimized, thereby achieving precise light guiding and further improving the optical performance of the supplementary light 100.

[0044] In one specific scheme, as shown in the coordinate system in Figure 2, the coordinates of point A are (1.5, 0) and the coordinates of point B are (1.37, 0.91). Of course, the coordinates of points A and B can fluctuate within plus or minus ten percent.

[0045] In the above embodiments, point C may coincide with point A. Alternatively, point C and point A may have the same y-axis coordinates but different y-axis coordinates.

[0046] Furthermore, the distance between any point on the third light-incident structure 1213 and the central optical axis w of the light-emitting source 110 can be defined as a second distance. This second distance can gradually increase along the direction from the light-emitting surface 122 to the light-incident surface 121. Here, the second distance refers to the perpendicular distance from any end of the third light-incident structure 1213 to the central optical axis w. Since the third light-incident structure 1213 is a rotationally symmetric structure, all points on a circle of the same radius of the third light-incident structure 1213 have the same second distance.

[0047] In this scheme, along the direction from the light-emitting surface 122 to the light-incident surface 121, the light-incident surface 121 is a gradually expanding structure. That is, the edge area of ​​the end of the third light-incident structure 1213 facing the light-emitting surface 122 is smaller than the edge area of ​​the end of the third light-incident structure 1213 facing the light-incident surface 121. Therefore, the third light-incident structure 1213 is a trumpet-shaped structure. The surface of the trumpet-shaped structure can increase the refraction angle of light refracting to the outer edge, thereby further improving the refraction performance of light and further improving the light distribution performance of the third light distribution region.

[0048] In one embodiment, in the direction from the light-emitting surface 122 to the light-incident surface 121, the third light-incident structure 1213 can be a gradually expanding structure, while the reflecting surface 123 can be a gradually contracting structure.

[0049] In the above scheme, the third light-incident structure 1213 is a gradually expanding structure, therefore the third light-incident structure 1213 is an inclined plane sidewall. The reflecting surface 123 is a freeform surface. Therefore, the third light distribution area uses a combination of a single large inclined sidewall and a freeform surface to achieve ultra-large angle light distribution, thus having a good contraction effect on ultra-large angle light rays.

[0050] In another optional embodiment, the tooth tips 1212c of all annular teeth 1212a are coplanar, meaning that the tooth tips 1212c of all annular teeth 1212a are on the same plane. Each annular tooth 1212a has a tooth groove 1212b formed on both sides. In this case, the inner tooth groove 1212b of the annular tooth 1212a adjacent to the first light-incident structure 1211 is formed by the edge of the first light-incident structure 1211 and the sidewall of the adjacent annular tooth 1212a. The outer tooth groove 1212b of the annular tooth 1212a adjacent to the third light-incident structure 1213 is formed by the edge of the third light-incident structure 1213 and the sidewall of the adjacent annular tooth 1212a.

[0051] The distance between the tooth tip 1212c and the tooth groove 1212b of the annular tooth 1212a is the third distance. This distance can be understood as the depth of each tooth groove 1212b, or the distance between the tooth tip 1212c and the lowest point of each tooth groove 1212b. The third distance gradually increases in the direction from the first light-incident structure 1211 to the third light-incident structure 1213. This can also be understood as the tooth height of each annular tooth 1212a gradually increasing. Please refer to Figure 4; the third distance is shown as h1 in Figure 4.

[0052] In this scheme, the further out the light emitted by the light source 110 goes, the larger the angle of the light. Therefore, by increasing the tooth height of the annular tooth 1212a, it can be adapted to light with a larger angle, thus making the light collection performance of the second light distribution area better.

[0053] In another alternative scheme, the distance between the tooth tips 1212c of two adjacent annular teeth 1212a is a fourth distance, which gradually decreases in the direction from the first light-incident structure 1211 to the third light-incident structure 1213. This fourth distance can also be understood as the tooth width of each annular tooth 1212a. Referring to Figure 4, the fourth distance is shown as h2 in Figure 4.

[0054] In this design, along the direction extending from the center to the edge of the light distribution element 120, the annular teeth 1212a closer to the center have a smaller height and a larger tooth width, resulting in a gentler slope and a smaller reflection angle. Conversely, the annular teeth 1212a closer to the edge have a larger height and a smaller tooth width, resulting in a steeper slope and a larger reflection angle. Therefore, this design adjusts the light at each position based on the tooth width and height of the annular teeth 1212a, thereby further improving the light collection performance of the second light distribution area.

[0055] In another alternative scheme, the number of annular teeth 1212a can be four, with teeth 1, teeth 2, teeth 3 and teeth 4 arranged sequentially in the direction of extension from the center to the edge of the light distribution element 120. The specific data of teeth 1, teeth 2, teeth 3 and teeth 4 are shown in Table 2 below.

[0056] Table 2

[0057] Of course, the parameters of the ring tooth 1212a are not limited to the data in Table 2. The parameters of each ring tooth 1212a can fluctuate between plus or minus 10%.

[0058] In another optional embodiment, each annular tooth 1212a can be formed by rotating an intersecting second curve c and a second straight line d around the central optical axis w of the light source 110. In this case, the second straight line d rotates around the central optical axis w to form an annular plane, while the second curve c rotates around the central axis to form an annular arcuate surface. Therefore, each annular tooth 1212a consists of an intersecting annular plane and an annular arcuate surface, and the intersection of the annular plane and the annular arcuate surface is the tooth tip 1212c. In two adjacent annular teeth 1212a, the intersection of the annular arcuate surface of one annular tooth 1212a and the annular plane of the other annular tooth 1212a is the tooth root of the annular tooth 1212a. This can also be understood as the annular arcuate surface of one annular tooth 1212a and the annular plane of the other annular tooth 1212a forming a tooth groove 1212b.

[0059] In this design, the cross-section of each annular tooth 1212a consists of an arc segment and a vertical straight segment. Therefore, light is first refracted in the straight segment region and then reflected in the arc segment region. This structure can effectively compress light rays with larger divergence angles, thus further improving the light collection performance of the second light distribution zone.

[0060] In the above embodiments, the second curve c can be a spline or a Bézier curve. The specific linearity and parameters of the second curve c are not limited in this paper.

[0061] Figure 4 shows a cross-section or longitudinal section of the light distribution element 120. In Figure 4, the cross-section of the second light-incident structure 1212 has multiple second curves c and multiple second straight lines d. The multiple second curves c and multiple second straight lines d are alternately arranged in the direction from the first light-incident structure 1211 to the third light-incident structure 1213. At this time, the multiple second straight lines d and multiple second curves c can be rotated to form the second light-incident structure 1212.

[0062] In another alternative scheme, the first light-incident structure 1211 is an arc-shaped convex surface, which can be a convex sphere. In this case, the radius of the sphere can be 0.9 mm, and the aperture of the sphere can be 0.31 mm. Of course, the arc-shaped convex surface is not limited to the shape and parameters disclosed herein, and can also be other shapes and parameters, which are not limited herein. The first light distribution area here essentially forms a convex lens structure, which has good control performance for small-angle light rays.

[0063] In another alternative embodiment, the reflective surface 123 can be composed of multiple arc-shaped reflective surfaces 1231 spliced ​​together, and the multiple arc-shaped reflective surfaces 1231 can be arranged in a ring array on the light distribution element 120. In this scheme, the reflective surface 123 is divided into multiple arrayed arc-shaped reflective surfaces 1231, and at this time, the scale texture effect on the reflective surface 123 can be clearly observed in appearance.

[0064] In the above embodiment, the edges of adjacent arc-shaped reflective surfaces 1231 need to have a certain inward reduction, thereby disrupting the continuity of the reflective surface 123 and allowing the scale-like texture to be observed. This can also be understood as requiring a transition region between adjacent arc-shaped reflective surfaces 1231, which disrupts the continuity of the reflective surface 123.

[0065] Optionally, the edge of each curved reflective surface 1231 can be recessed along its normal direction to create a scale-like texture effect. Here, the normal direction is perpendicular to each curved reflective surface 1231.

[0066] In another alternative design, the edge of each curved reflective surface 1231 can bulge outward along its normal direction. This design can also create a scale-like texture effect.

[0067] In one alternative design, the reflective surface 123 is divided into six rings. The widths of the rings, from top to bottom, are 0.3883 mm, 0.3924 mm, 0.401 mm, 0.4206 mm, 0.4243 mm, and 0.4818 mm, respectively. Each ring is further divided into 40 square scale-like regions, forming a scale-like array, for a total of 240 scale-like regions. Each square scale-like region is the aforementioned arc-shaped reflective surface 1231.

[0068] Of course, the reflective surface 123 can also be divided into other numbers of rings and other numbers of scale arrays, which are not limited in this paper.

[0069] The light-distributing component 120 in this application can be manufactured using a casting process. In this case, the surface of the processing mold can have a scale array, which can then be transferred onto the light-distributing component 120. Alternatively, the scale array of the light-distributing component 120 in this application can be cut by machining. In this case, an inwardly recessed groove can be machined on the surface of the light-distributing component 120 using a carving tool, and scale areas can be formed between adjacent grooves.

[0070] In the above embodiments, if the inward reduction of the edge of the arc-shaped reflective surface 1231 is large, it can easily affect the reflective performance of the reflective surface 123, thus resulting in a significant loss of the light distribution capability of the third light distribution area.

[0071] In another alternative scheme, the inward reduction of the edge of each arc-shaped reflective surface 1231 along its normal direction can be greater than 0 mm and less than or equal to 0.03 mm. In this scheme, since the maximum inward reduction of each small arc-shaped reflective surface 1231 relative to the reflective surface 123 does not exceed 0.03 mm, the loss of light distribution capability of the reflective surface 123 is small, thus achieving an appearance texture effect while preserving the optical effect.

[0072] In the above embodiments, a silver-plated film can be applied to the reflective surface 123, so that after the scale array is formed, a dynamic shimmering effect will occur as the viewing angle changes. Optionally, to meet the requirements of the silver-plating process, the material of the light distribution element 120 can be polycarbonate (PC), but other materials are also possible and are not limited herein.

[0073] In another alternative embodiment, the supplementary light 100 may further include a liquid crystal dimming film 130 and a light-transmitting lens 140. The liquid crystal dimming film 130 may be located between the light-transmitting lens 140 and the light distribution element 120, and the liquid crystal dimming film 130 may cover the light-emitting surface 122.

[0074] The liquid crystal dimming film 130 can switch between a first state and a second state. When the liquid crystal dimming film 130 is in the first state, its transmittance is a first transmittance. When the liquid crystal dimming film 130 is in the second state, its transmittance is a second transmittance. The first transmittance can be greater than the second transmittance.

[0075] Specifically, the liquid crystal dimming film 130 includes two transparent conductive films and a liquid crystal layer disposed between the two transparent conductive films. By adjusting the voltage between the two transparent conductive films, the light transmittance between the liquid crystal layers is changed.

[0076] For example, when the two transparent conductive films are not energized, the liquid crystal in the liquid crystal layer is encapsulated by substances in space, such as polymers. Spatial distortion of the nematic phase orientation occurs in the liquid crystal channel, and the liquid crystal channel is discontinuous, thus making the liquid crystal dimming film 130 appear opaque. Here, opaque means that the liquid crystal dimming film 130 exhibits a frosted effect; it can transmit light, but the transmittance is poor. This opaque state is the second transmittance mentioned above. When the liquid crystal dimming film 130 is in an opaque state, due to the disordered arrangement of the liquid crystals, the exit angle of the liquid crystal dimming film 130 is greater than its incident angle, resulting in a large scattering angle. Therefore, the liquid crystal dimming film 130 has a better scattering effect in the opaque state, thus having a larger light emission angle. Therefore, in the opaque state, the light emitted by the light distribution element 120 can increase the light emission angle after passing through the liquid crystal dimming film 130, thereby increasing the light emission field of view of the supplementary light lamp 100. Therefore, when the liquid crystal dimming film 130 is in the second state, the supplementary light 100 can achieve short-distance, wide-area supplementary lighting.

[0077] When the two transparent conductive films are energized, the liquid crystal molecules align in an orderly manner, and the liquid crystal dimming film 130 transitions from an opaque state to a transparent state. In the transparent state, the liquid crystal dimming film 130 has good light transmittance; therefore, this transparent state represents the first transmittance mentioned above. Thus, the first transmittance is greater than the second transmittance. In the transparent state, the liquid crystal molecules are arranged in an orderly manner, causing the exit angle of the liquid crystal dimming film 130 to be approximately equal to its incident angle, resulting in a smaller scattering angle. Therefore, in the transparent state, the liquid crystal dimming film 130 exhibits poor light scattering and high transmittance. Thus, when the liquid crystal dimming film 130 is in its first state, the supplementary light 100 can achieve long-distance, small-area supplementary lighting.

[0078] In another approach, the state switching of the liquid crystal dimming film 130 is achieved by adjusting the voltage between the two transparent conductive films. In the first state, the voltage between the two transparent conductive films is a first voltage; in the second state, the voltage between the two transparent conductive films is a second voltage. The first voltage is greater than the second voltage. At this time, the liquid crystal dimming film 130 is in a matte state in both the first and second states, but the transmittance in the first state is greater than that in the second state. Therefore, the liquid crystal dimming film 130 has better light transmission performance in the first state, but its emission field of view is smaller. Conversely, the liquid crystal dimming film 130 has a larger emission field of view in the second state, but its transmittance is lower.

[0079] In this embodiment, by switching the state of the liquid crystal dimming film 130, the emission angle of the light from the fill light 100 is adjusted, thereby enabling the fill light 100 to obtain different field of view angles. This allows the fill light 100 to be compatible with more shooting scenarios, thereby improving the performance of the fill light 100.

[0080] In addition, the liquid crystal dimming film 130 is located between the light-transmitting lens 140 and the light-distributing component 120. Therefore, the liquid crystal dimming film 130 is sandwiched between the light-transmitting lens 140 and the light-distributing component 120, which can protect the liquid crystal dimming film 130 and avoid the risk of damage to the liquid crystal dimming film 130.

[0081] The supplementary lighting disclosed in this application allows the center illuminance of the supplementary light 100 to be adjusted within a range of 1-6 times under different states of the liquid crystal dimming film 130. The supplementary lighting range can be adjusted from approximately 80 degrees to 40 degrees. Therefore, it can meet the supplementary lighting needs from wide-angle, portrait to telephoto lenses, and the supplementary lighting illuminance in telephoto mode is more than 10 times that of existing products, thus greatly improving the night scene photography capabilities of electronic devices.

[0082] In the above embodiments, the light-transmitting lens 140 can cover the mounting hole 210 of the housing 200 of the electronic device, or it can be located inside the mounting hole 210.

[0083] In one optional embodiment, the light-transmitting lens 140 may include a lens body 141 and a protrusion 142, the protrusion 142 being disposed on the side of the lens body 141 facing away from the light distributor 120. In the direction of the central axis of the light-emitting source 110, the orthographic projection of the protrusion 142 may lie within the orthographic projection of the lens body 141, and the area of ​​the orthographic projection of the protrusion 142 is smaller than the area of ​​the orthographic projection of the lens body 141. In this case, the light-transmitting lens 140 has a stepped structure. At least a portion of the protrusion 142 may be located within the mounting hole 210, while the area of ​​the lens body 141 protruding from the protrusion 142 may abut against the inner surface of the housing 200 of the electronic device.

[0084] In this design, the light-transmitting lens 140 has a stepped structure, which facilitates the assembly of the light-transmitting lens 140.

[0085] In another alternative embodiment, the light distribution element 120 may include a main body 1201 and an annular extension 1202. The main body 1201 may have an incident light surface 121 and an emitting light surface 122 disposed opposite to each other. The main body 1201 has a first circumferential sidewall and a second circumferential sidewall arranged along the central optical axis w of the light source 110. The first circumferential sidewall is located on the side closer to the emitting light surface 122, and the second circumferential sidewall is located on the side closer to the incident light surface 121. The annular extension 1202 may be disposed around the first circumferential sidewall, and the second circumferential sidewall forms a reflective surface 123. The annular extension 1202 is disposed on the outer side of the main body 1201. The annular extension 1202 can be used to support the light distribution element 120. For example, the light distribution element 120 can be connected to the housing 200 of an electronic device through the annular extension 1202.

[0086] In this design, the annular extension 1202 can fix the light distribution component 120, thereby facilitating the assembly operation of the supplementary light 100.

[0087] In the above embodiments, the light-transmitting lens 140 and the housing 200 can be bonded together by a first adhesive layer 310, which can be double-sided adhesive. To prevent the light-transmitting lenses 140 from abutting against the liquid crystal dimming film 130, a buffer layer 320 can be provided between the light-transmitting lenses 140 and the liquid crystal dimming film 130, which can be foam. The liquid crystal dimming film 130 and the light distribution element 120 can be bonded together by a second adhesive layer 330, which can be double-sided adhesive.

[0088] Based on the fill light 100 disclosed in the embodiments of this application, the embodiments of this application also disclose an electronic device, which includes the fill light 100 described in any of the embodiments above.

[0089] The electronic device disclosed in this application may further include a housing 200 and a circuit board. The housing 200 provides a mounting base for other components of the electronic device, and the housing 200 may have mounting holes 210. The aforementioned supplementary light 100 may be located within the accommodating space of the housing 200. The light-emitting surface 122 of the light distribution element 120 may be disposed opposite to the mounting holes 210. The circuit board here may be the main board or a sub-board of the electronic device. The light source 110 of the supplementary light 100 may be disposed on the circuit board, and the circuit board supplies power to the light source 110 of the supplementary light 100 and controls the on and off of the light source 110. In addition, the liquid crystal dimming film 130 in the above solution may also be electrically connected to the circuit board.

[0090] In the above embodiment, the light-transmitting lens 140, the liquid crystal dimming film 130 and the light distribution element 120 are arranged in sequence. At this time, due to the presence of the light-transmitting lens 140, the installation position of the liquid crystal dimming film 130 and the light distribution element 120 is lowered, and thus further away from the mounting hole 210, so that some large-angle light rays will be blocked and cannot be emitted from the mounting hole 210.

[0091] Based on this, in another embodiment, when the supplementary light 100 includes the aforementioned light-transmitting lens 140, a portion of the lens body 141 that protrudes radially from the protrusion 142 can be connected to the inner surface of the housing 200. At least a portion of the protrusion 142 can be located in the mounting hole 210, and the inner surface of the mounting hole 210 can have a gap 211 between it and the sidewall of the protrusion 142.

[0092] In this design, some large-angle light rays can undergo total internal reflection at the gap 211 between the inner surface of the mounting hole 210 and the side wall of the protrusion 142, thereby ensuring that some large-angle light rays can be emitted smoothly, and further improving the utilization rate of light.

[0093] In the above embodiments, the housing 200 may include a front shell and a rear cover, which together form an accommodating space. The supplementary light can be located in the accommodating space, and the mounting hole 210 can be provided on the rear cover, which can be understood as a battery cover. Of course, the housing may also include a front shell, a middle frame, and a rear cover. Depending on the different components, the housing 200 may have various structures.

[0094] The electronic devices disclosed in this application can be smartphones, tablets, e-book readers, wearable devices (such as smartwatches), video game consoles, etc. This application does not limit the specific types of electronic devices.

[0095] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A supplementary light, wherein, Includes light source and light distribution components; The light distribution element has an incident light surface and an exit light surface arranged opposite to each other, and the light source is located on the side where the incident light surface of the light distribution element is located; a reflective surface is formed on the circumferential sidewall of the light distribution element; The light-incident surface includes a first light-incident structure, a second light-incident structure, and a third light-incident structure. The second light-incident structure is arranged around the first light-incident structure, and the third light-incident structure is arranged around the second light-incident structure. The reflective surface is arranged around the third light-incident structure. The first light-incident structure, the second light-incident structure, the third light-incident structure, and the reflective surface are all rotationally symmetrical about the central optical axis of the light-emitting light source. The first light-incident structure is an arc-shaped convex surface, and the first angle light rays from the light-emitting light source are emitted from the light-emitting surface after passing through the first light-incident structure; The second light-incident structure includes a plurality of annular teeth, which are continuously arranged in the direction from the first light-incident structure to the third light-incident structure. The second angle light rays of the light-emitting source are emitted from the light-emitting surface after passing through the second light-incident structure. The light from the light source at the third angle is incident on the reflective surface through the third light-incident structure, and after being reflected by the reflective surface, it is emitted from the light-out surface.

2. The supplementary lighting according to claim 1, wherein, The light distribution element has a light guiding groove on the side opposite to the light incident surface. The light guiding groove is arranged opposite to the light source. The bottom surface of the light guiding groove has the first light incident structure and the second light incident structure. The inner side surface of the light guiding groove has the third light incident structure, which is arranged opposite to the reflective surface.

3. The supplementary lighting according to claim 2, wherein, The distance between any point on the reflective surface and the central optical axis of the light source is a first distance, which gradually decreases along the direction from the light-emitting surface to the light-incident surface.

4. The supplementary lighting according to claim 3, wherein, The reflective surface is formed by rotating a first curve about the central optical axis of the light source; the third light-incident structure is formed by rotating a first straight line about the central optical axis of the light source.

5. The supplementary lighting according to claim 4, wherein, The distance between any point on the third light-incident structure and the central optical axis of the light-emitting source is the second distance, which gradually increases along the direction from the light-emitting surface to the light-incident surface.

6. The supplementary lighting according to claim 1, wherein, All the annular teeth have coplanar tooth tips, and each annular tooth has tooth grooves formed on both sides; the distance between the tooth tip of the annular tooth and the tooth groove of the annular tooth is a third distance; the third distance gradually increases in the direction from the first light-incident structure to the third light-incident structure.

7. The supplementary lighting according to claim 6, wherein, The distance between the tips of two adjacent annular teeth is the fourth distance, which gradually decreases in the direction from the first light-incident structure to the third light-incident structure.

8. The supplementary lighting according to claim 1, wherein, Each of the annular teeth is formed by rotating an intersecting second curve and a second straight line about the central optical axis of the light source.

9. The supplementary lighting according to claim 1, wherein, The reflective surface is composed of multiple arc-shaped reflective surfaces spliced ​​together, and the multiple arc-shaped reflective surfaces are arranged in a ring array on the light distribution component.

10. The supplementary lighting according to claim 9, wherein, The inward dimension of the edge of each of the said arc-shaped reflective surfaces along its normal direction is greater than 0 mm and less than or equal to 0.03 mm.

11. The supplementary lighting according to claim 1, wherein, The supplementary light also includes a liquid crystal dimming film and a light-transmitting lens. The liquid crystal dimming film is located between the light-transmitting lens and the light distribution element, and the liquid crystal dimming film covers the light-emitting surface. The liquid crystal dimming film can switch between a first state and a second state. When the liquid crystal dimming film is in the first state, the light transmittance of the liquid crystal dimming film is a first light transmittance. When the liquid crystal dimming film is in the second state, the light transmittance of the liquid crystal dimming film is a second light transmittance. The first light transmittance is greater than the second light transmittance.

12. The supplementary lighting according to claim 11, wherein, The light-transmitting lens includes a lens body and a protrusion. The protrusion is located on the side of the lens body away from the light distribution element. In the direction of the central optical axis of the light-emitting light source, the orthographic projection of the protrusion is located within the orthographic projection of the lens body, and the area of ​​the orthographic projection of the protrusion is smaller than the area of ​​the orthographic projection of the lens body.

13. The supplementary lighting according to claim 1, wherein, The light distribution component includes a main body and an annular extension. The main body has an incident light surface and an emitted light surface disposed opposite to each other. The main body has a first circumferential sidewall and a second circumferential sidewall arranged along the direction of the central optical axis of the light source. The first circumferential sidewall is located on the side closer to the emitted light surface, and the second circumferential sidewall is located on the side closer to the incident light surface. The annular extension is disposed around the first circumferential sidewall, and the second circumferential sidewall forms the reflective surface.

14. An electronic device, wherein, It includes a housing and a fill light according to any one of claims 1 to 13, wherein the fill light is disposed in the housing.

15. The electronic device according to claim 14, wherein, The supplementary light also includes a light-transmitting lens, which is disposed opposite to the light-emitting surface of the light-distributing component; the light-transmitting lens includes a lens body and a protrusion, the protrusion is disposed on the side of the lens body away from the light-distributing component, and in the direction of the central optical axis of the light source, the orthographic projection of the protrusion is located within the orthographic projection of the lens body, and the area of ​​the orthographic projection of the protrusion is smaller than the area of ​​the orthographic projection of the lens body; The housing has a mounting hole, and the lens body protrudes radially from a portion of the protrusion and is connected to the inner surface of the housing. At least a portion of the protrusion is located in the mounting hole, and there is a gap between the inner surface of the mounting hole and the sidewall of the protrusion.

Images