Fill light and electronic device

Abstract

The present application relates to the technical field of optical devices, and discloses a fill light and an electronic device. The fill light comprises a light guide member and a light-emitting source. The light guide member has a first reflective surface, a second reflective surface, an annular light-emitting surface, and a light-incident surface. The light-incident surface and the annular light-emitting surface are located on two opposite sides of the light guide member. The light-emitting source is arranged opposite to the light-incident surface. The first reflective surface and the annular light-emitting surface are located on the same side of the light guide member. The light-incident surface is arranged opposite to the first reflective surface. The second reflective surface is arranged around the light-incident surface. The annular light-emitting surface is provided with a radial texture structure. The radial texture structure comprises a plurality of strip-shaped protrusions. The plurality of strip-shaped protrusions are arranged at intervals in the circumferential direction of the annular light-emitting surface. Each strip-shaped protrusion extends in the radial direction of the annular light-emitting surface. Light emitted by the light-emitting source is reflected by the first reflective surface and the second reflective surface and then exits from the annular light-emitting surface.

Description

Fill lights and electronic equipment

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411647533.9, filed on November 18, 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, it is difficult to capture clear photos in low-light environments or night scenes, and the experience is also limited in video recording or live streaming.

[0005] To provide a better user experience for electronic devices, related technologies include the installation of supplementary lighting. These supplementary lights can provide illumination in low-light environments and night scene photography, thereby improving the imaging effect of the electronic devices.

[0006] However, in related technologies, the light-emitting surface of the fill light is usually a planar structure, which results in a relatively simple light emission effect of the fill light. Summary of the Invention

[0007] The purpose of this application is to provide a supplementary light and electronic device that can solve the technical problem of the single light output effect of supplementary lights.

[0008] To solve the above-mentioned technical problems, this application is implemented as follows:

[0009] A supplementary lighting lamp includes a light guide and a light source;

[0010] The light guide has a first reflective surface, a second reflective surface, an annular light-emitting surface, and a light-incident surface. The light-incident surface and the annular light-emitting surface are located on opposite sides of the light guide. The light-emitting source is arranged opposite to the light-incident surface. The first reflective surface and the annular light-emitting surface are located on the same side of the light guide. The light-incident surface is arranged opposite to the first reflective surface. The second reflective surface is arranged around the light-incident surface.

[0011] The annular light-emitting surface is provided with a radial texture structure, which includes a plurality of strip-shaped protrusions. The plurality of strip-shaped protrusions are arranged at intervals along the circumference of the annular light-emitting surface, and each strip-shaped protrusion extends radially along the annular light-emitting surface. The light emitted by the light source is reflected by the first reflective surface and the second reflective surface and then emitted from the annular light-emitting surface.

[0012] An electronic device includes a housing, a circuit board, and the aforementioned supplementary light, wherein the light guide is disposed on the housing, and the light source is disposed on the circuit board.

[0013] In this embodiment, the annular light-emitting surface of the light guide has a radial texture structure, which includes multiple strip-shaped protrusions. These protrusions are spaced apart circumferentially along the annular light-emitting surface, and each protrusion extends radially along the annular surface. In this design, the radial texture structure protrudes from the annular light-emitting surface, creating a radial stripe-like light effect. This means that a layer of radial stripe-like light effect is superimposed on the planar light effect, thereby enriching the light output effect of the supplementary light and increasing the diversity of the light output effect. Attached Figure Description

[0014] Figures 1 and 2 are exploded views of a fill light disclosed in an embodiment of this application;

[0015] Figures 3 to 7 are schematic diagrams of the structure of a light guide for a supplementary light disclosed in an embodiment of this application;

[0016] Figures 8 and 9 are cross-sectional views of a supplementary light disclosed in an embodiment of this application;

[0017] Figure 10 is a partial enlarged view of a fill light disclosed in an embodiment of this application;

[0018] Figure 11 is a schematic diagram of the radial texture structure of a fill light disclosed in an embodiment of this application;

[0019] Figure 12 is a schematic diagram of the cross-section of Figure 11.

[0020] Explanation of reference numerals in the attached drawings: 100-Light guide, 110-First reflective surface, 111-Concave area, 112-Planar area, 120-Second reflective surface, 121-Trapezoidal reflective surface, 121a-First side line, 121b-Second side line, 130-Annular light-emitting surface, 140-Light-incident surface, 150-Radial texture structure, 151-Strip-shaped protrusion, 1511-First strip-shaped plane, 1512-Second strip-shaped plane, 1513-Third strip-shaped plane, 1514-Fourth strip-shaped plane, 1515-Fifth strip-shaped plane, 200-Light source, 210-Light-emitting element, 300-Light-shielding element, 310-First light-shielding part, 320-Second light-shielding part, 301-Annular light-transmitting area, 400-Lens, 500-Circuit board, W1-Central axis, W2-Central optical axis. Detailed Implementation

[0021] 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. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] 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 terms can be used interchangeably 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.

[0023] 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.

[0024] Please refer to Figures 1 to 12. This application discloses a supplementary light, which is applied in electronic devices. The disclosed supplementary light includes a light guide 100 and a light source 200.

[0025] The light guide 100 is a light transmission component through which light emitted from the light source 200 is transmitted. The light guide 100 can be made of a transparent material, such as transparent glass or transparent resin. The light guide 100 has a first reflective surface 110, a second reflective surface 120, an annular light-emitting surface 130, and a light-incident surface 140. The light-incident surface 140 and the annular light-emitting surface 130 are located on opposite sides of the light guide 100. The light source 200 is positioned opposite the light-incident surface 140, and the first reflective surface 110 and the annular light-emitting surface 130 are located on the same side of the light guide 100. The light-incident surface 140 is positioned opposite the first reflective surface 110, and the second reflective surface 120 surrounds the light-incident surface 140.

[0026] In the specific supplemental lighting process, the light emitted by the light source 200 enters the light guide 100 through the light incident surface 140, is transmitted to the first reflecting surface 110, and is then reflected by the first reflecting surface 110 before being directed to the second reflecting surface 120. After passing through the second reflecting surface 120, the light is emitted through the annular light emitting surface 130, forming a soft, moderately bright, and continuously emitting light halo on the annular light emitting surface 130. Optionally, the light source 200 can be an LED (Light Emitting Diode) lamp, a high-pressure sodium lamp, a metal halide lamp, etc. Of course, the light source 200 of the supplemental lighting can also have other structures, which are not limited in this article.

[0027] In the embodiments disclosed in this application, the light emitted by the light source 200 is reflected between the first reflective surface 110 and the second reflective surface 120. Therefore, the first reflective surface 110 and the second reflective surface 120 form a double-reflection structure. Utilizing this double-reflection structure for light guiding reduces the number of light reflections and maximizes the guidance of light to the annular light-emitting surface 130, thus significantly improving the luminous efficiency of the supplementary light. Therefore, even with a single light source, the supplementary light has sufficient energy. This solution uses a double-reflection structure for light guiding, effectively reducing the number of light sources required for the supplementary light, resulting in a smaller size, lower cost, and better heat dissipation performance, thereby improving the overall performance of the supplementary light.

[0028] In the supplementary lighting disclosed in this application, a radial texture structure 150 is provided on the annular light-emitting surface 130. The radial texture structure 150 includes a plurality of strip-shaped protrusions 151, which are arranged at intervals along the circumference of the annular light-emitting surface 130, and each strip-shaped protrusion 151 extends radially along the annular light-emitting surface 130. It can be understood that the axis of each strip-shaped protrusion 151 passes through the center of the annular light-emitting surface 130. In this case, each strip-shaped protrusion 151 can be understood as a spoke. Therefore, the plurality of strip-shaped protrusions 151 form a radial shape radiating from the center of the annular light-emitting surface 130 to its edge.

[0029] In the embodiments disclosed in this application, the annular light-emitting surface 130 is planar in general, thus forming an annular base light effect. Multiple strip-shaped protrusions 151 are superimposed on the annular base light effect, thus forming a layer of radial striped light effect on the annular base light effect. This enriches the light emission effect of the fill light, making the light emission effect of the fill light more diverse, thereby improving the diversity of the light emission effect of the fill light and thus improving the aesthetic appearance of the electronic device.

[0030] In addition, when the fill light is not in operation, external light can shine on the radial texture structure 150, thereby illuminating the radial texture structure 150. Therefore, the radial texture structure 150 can be clearly observed to bulge outward relative to the annular light-emitting surface 130, thus allowing the radial texture structure to be observed. This makes the overall appearance of the fill light more three-dimensional and diverse, thereby further improving the appearance performance of the electronic device.

[0031] In the above scheme, the radial texture structure 150 can be integrally formed with the light guide 100, that is, the radial texture structure 150 is directly formed in the light guide 100 during processing or injection molding. Alternatively, the light guide 100 and the radial texture structure 150 can be set separately. In this case, the radial texture structure 150 can be fixed to the annular light-emitting surface 130 by adhesive.

[0032] Optionally, the light guide 100 and the radial texture structure 150 can be made of the same material. Of course, the light guide 100 and the radial texture structure 150 can be made of different materials. This document does not impose any restrictions on this.

[0033] In the above embodiments, the number of strip-shaped protrusions 151 in the radial texture structure 150 can be 80. Of course, the number of strip-shaped protrusions 151 can also be other, which is not limited in this article.

[0034] In the above scheme, the light transmittance of the annular light-emitting surface 130 can be a first light transmittance, and the light transmittance of each strip-shaped protrusion 151 can be a second light transmittance. The first light transmittance can be equal to the second light transmittance. At this time, the light transmittance of the annular light-emitting surface 130 is the same as the light transmittance of the radial texture structure 150.

[0035] In another optional embodiment, the first transmittance is less than the second transmittance. In this case, the transmittance of the annular light-emitting surface 130 is less than the transmittance of the radial texture structure 150. This can also be understood as the transmittance of the area of ​​the annular light-emitting surface 130 with the radial texture structure 150 being greater than the transmittance of the area of ​​the annular light-emitting surface 130 without the radial texture structure 150.

[0036] In this design, the radial texture structure 150 has high light transmittance, resulting in greater brightness and making the radial texture light effect more prominent and obvious, thus better highlighting the radial texture light effect. Additionally, the annular light-emitting surface 130 has lower light transmittance, providing better scattering and a larger light emission angle. This further increases the emission angle of the supplementary light, thereby increasing the light emission field of view of the supplementary light.

[0037] Optionally, the supplementary light may also include a diffusion film. In this case, the diffusion film has clearance holes to avoid the radial texture structure 150. That is, the diffusion film is not attached to the radial texture structure 150, but only to the area of ​​the annular light-emitting surface 130 where the radial texture structure 150 is not located. Alternatively, the mold forming the light guide 100 can be sandblasted or frosted to create a frosted surface on the area of ​​the annular light-emitting surface 130 where the radial texture structure 150 is not located. Of course, other processes can also be used, which are not limited herein.

[0038] In the above scheme, the circumferential sidewall of the light guide 100 can form a second reflective surface 120. Here, the circumferential sidewall refers to the outer sidewall of the light guide 100, so the outer sidewall of the light guide 100 forms the second reflective surface 120.

[0039] In another alternative embodiment, the first reflecting surface 110, the second reflecting surface 120, the incident light surface 140, and the annular light emitting surface 130 are all rotationally symmetrical about the central axis W1 of the light guide 100. Here, the central axis W1 refers to the axis guiding the center position of the light guide 100 or the physical center line of the light guide 100. In this embodiment, since the first reflecting surface 110, the second reflecting surface 120, the annular light emitting surface 130, and the incident light surface 140 are all rotationally symmetrical about the central axis W1 of the light guide 100, the reflected light illuminance distribution of the first reflecting surface 110 and the second reflecting surface 120 in their circumferential direction is uniform, thus making the light from the supplementary lamp more uniform. Furthermore, the supplementary lamp disclosed in this application adopts a coaxial double-reflection rotationally symmetrical structure, therefore the circumferential luminous intensity of the annular light emitting surface 130 is the same, thereby giving the supplementary lamp both sufficient luminous energy and good luminous uniformity, thus giving the supplementary lamp better optical performance.

[0040] In another optional embodiment, the distance between any point on the second reflective surface 120 and the central axis W1 of the light guide 100 can be defined as a first distance, which gradually decreases in the direction from the annular light-emitting surface 130 to the light-incident surface 140. Here, the first distance refers to the perpendicular distance from any end of the second reflective surface 120 to the central axis W1. Since the second reflective surface 120 has a rotationally symmetric structure, all points on a circle of the same radius of the second reflective surface 120 have the same first distance.

[0041] In this design, the second reflecting surface 120 is a tapered structure along the direction from the annular light-emitting surface 130 to the light-incident surface 140. That is, the edge area of ​​the second reflecting surface 120 facing the annular light-emitting surface 130 is larger than the edge area of ​​the second reflecting surface 120 facing the light-incident surface 140. Therefore, the second reflecting surface 120 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 and guiding performance of the second reflection.

[0042] In another alternative embodiment, the second reflective surface 120 can be formed by rotating a curve about the central axis W1 of the light guide 100. This curve is the surface profile of the second reflective surface 120, which refers to a line segment that forms a specified contour after rotating one revolution around a certain position. This curve can be a Bézier curve or a spline curve. Of course, it can also be other structural curves, which are not limited herein.

[0043] In this scheme, the second reflective surface 120 is obtained by rotating the third curve around the central axis W1 of the light guide 100. Therefore, by optimizing the shape of the third curve, the surface shape of the second reflective surface 120 can be further optimized, thereby achieving precise light guiding and further improving the optical performance of the supplementary light.

[0044] In another alternative embodiment, the second reflective surface 120 can be formed by splicing together multiple trapezoidal reflective surfaces 121, which are arranged circumferentially along the light guide 100. This design allows for a noticeable scale-like texture effect on the second reflective surface 120, thereby further improving the appearance of the electronic device. Furthermore, the trapezoidal structure has a larger reflective surface area, thus minimizing the impact on reflective performance. Therefore, this application effectively improves the appearance of the electronic device without affecting reflective performance.

[0045] The light guide 100 in this application can be manufactured using a casting process. In this case, the surface of the processing mold can have a trapezoidal scale array, which can then be transferred onto the light guide 100. Alternatively, the trapezoidal scale array of the light guide 100 in this application can be cut by machining.

[0046] In the above scheme, multiple trapezoidal reflective surfaces 121 can be connected end-to-end sequentially along the circumference of the light guide 100. In this case, the upper base of one trapezoidal reflective surface 121 is connected to the lower base of another trapezoidal reflective surface 121, forming a ring structure. Alternatively, multiple trapezoidal reflective surfaces 121 can be distributed in reverse order along the circumference of the light guide 100. In this case, the waists of two adjacent trapezoidal reflective surfaces 121 are connected, with the upper base of one trapezoidal reflective surface 121 facing the annular light-emitting surface 130 and the upper base of the other trapezoidal reflective surface 121 facing the light-incident surface 140. Here, the upper base of the trapezoidal reflective surface 121 is the shorter side of the trapezoid, and the lower base is the longer side of the trapezoid.

[0047] In another alternative scheme, any two trapezoidal reflective surfaces 121 are rotationally symmetrical about the central axis W1 of the light guide 100. That is, rotating one trapezoidal reflective surface 121 around the central axis W1 by a certain angle yields another trapezoidal reflective surface 121. Therefore, the multiple trapezoidal reflective surfaces 121 have the same outline. The trapezoidal reflective surface 121 is an isosceles trapezoidal structure, with its upper and lower bases arranged along the direction from the annular light-emitting surface 130 to the light-receiving surface 140. As shown in Figure 7, the first side line 121a and the second side line 121b are the two sides of a trapezoidal reflective surface 121. Since the trapezoidal reflective surface 121 is an isosceles trapezoidal structure, the first side line 121a and the second side line 121b are the same. It can also be understood that the second side line 121b is formed by rotating the first side line 121a by a certain angle. In this scheme, the second reflective surface 120 is formed by multiple rotationally symmetrical isosceles trapezoidal reflective surfaces. At this time, the reflection efficiency of each region is consistent, so the loss of the light distribution capability of the second reflective surface 120 is small. Thus, the appearance texture effect is achieved while retaining the optical effect.

[0048] In the above embodiments, a silver-plated film can be applied to the second reflective surface 120, 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 guide 100 can be PC (Polycarbonate), and other materials can also be used, which are not limited herein.

[0049] In one specific embodiment, the second reflective surface 120 can be formed by splicing 36 identical isosceles trapezoidal surfaces at a certain angle. First, a spline curve C is determined. Rotating spline curve C around the central axis W1 of the light guide 100 by a certain angle forms a trapezoidal reflective surface 121. Here, spline curve C can be the waist of the trapezoidal reflective surface 121, which is the aforementioned first side edge line 121a. Then, rotating spline curve C by 10° around the central axis W1 of the light guide 100 yields C1, which has the same shape as spline curve C but at a different position. Connecting the two endpoints of C and C1 forms a trapezoidal surface, which is the trapezoidal reflective surface 121, and C1 is the aforementioned second edge line. Similarly, the same 36 trapezoidal reflective surfaces 121 are spliced ​​together at a certain angle.

[0050] In one specific scheme, the parameters of spline curve C are shown in Table 1 below:

[0051] Table 1

[0052] The coordinate parameters in Table 1 determine the spline curve C, which is the first side line 121a mentioned above. The first side line 121a rotates 10° around the central axis W1 of the light guide 100 to form the spline curve C1, which is the second side line 121b. Connecting the two endpoints of C and C1 forms the trapezoidal reflective surface 121. However, the maximum curvature, minimum curvature, and curve length of the spline curve C are not limited to the data in Table 1. The parameters of the spline curve C can fluctuate within ±10%.

[0053] Of course, the first side line 121a in the above embodiments is not limited to a spline curve, but can also be a Bézier curve. A Bézier curve can be determined by parameters such as the starting position, the starting angle, the starting tangent length, the ending position, the ending angle, and the ending tangent length.

[0054] In the above scheme, the strip-shaped protrusion 151 can be a cylindrical or semi-cylindrical structure. Here, cylindrical refers to a structure with a circular cross-section, while semi-cylindrical refers to a structure with a semi-circular cross-section.

[0055] In another alternative embodiment, the strip-shaped protrusion 151 can be a prismatic structure. The strip-shaped protrusion 151 can have a first strip-shaped plane 1511 and a second strip-shaped plane 1512. Both the first strip-shaped plane 1511 and the second strip-shaped plane 1512 can extend radially along the annular light-emitting surface 130, and can be arranged circumferentially along the annular light-emitting surface 130. Both the first strip-shaped plane 1511 and the second strip-shaped plane 1512 are located on the side of the strip-shaped protrusion 151 facing away from the annular light-emitting surface 130. The edge of the first strip-shaped plane 1511 facing away from the annular light-emitting surface 130 intersects with the edge of the second strip-shaped plane 1512 facing away from the annular light-emitting surface 130. In this case, the intersection of the edge of the first strip-shaped plane 1511 facing away from the annular light-emitting surface 130 and the edge of the second strip-shaped plane 1512 facing away from the annular light-emitting surface 130 forms a boundary line. In this design, compared to a planar structure, users can more clearly observe the intersecting edge line formed by the first strip plane 1511 and the second strip plane 1512, thus further improving the appearance performance of the fill light.

[0056] In the above scheme, the strip-shaped protrusion 151 can be a triangular prism structure. In this case, the other strip plane of the triangular prism structure, in addition to the first strip plane 1511 and the second strip plane 1512, is connected to the annular light-emitting surface 130.

[0057] In another alternative design, the strip-shaped protrusion 151 can be a pentagonal prism structure, meaning that the strip-shaped protrusion 151 has five strip-shaped planes. Specifically, as shown in Figure 11, the strip-shaped protrusion 151 can also have a third strip-shaped plane 1513, a fourth strip-shaped plane 1514, and a fifth strip-shaped plane 1515. These three planes can all extend radially along the annular light-emitting surface 130. The first strip-shaped plane 1511, the second strip-shaped plane 1512, the third strip-shaped plane 1513, the fourth strip-shaped plane 1514, and the fifth strip-shaped plane 1515 can intersect sequentially along the circumference of the strip-shaped protrusion 151. The fourth strip-shaped plane 1514 is in contact with the annular light-emitting surface 130. Here, the fourth strip-shaped plane 1514 is the base surface of the pentagonal prism structure. The third strip plane 1513 and the fifth strip plane 1515 are located on opposite sides of the strip-shaped protrusion 151 and are parallel to each other. The included angle between the first strip plane 1511 and the fifth strip plane 1515, and the included angle between the second strip plane 1512 and the third strip plane 1513 are both obtuse angles.

[0058] In this design, the strip-shaped protrusion 151 is a pentagonal prism structure. Compared with the triangular prism structure, the pentagonal prism structure has more light-emitting or light-guiding surfaces, which can increase the refraction and scattering of light, thereby further improving the brightness and light efficiency of the supplementary light.

[0059] Furthermore, the angles between the third strip plane 1513 and the fifth strip plane 1515 and the fourth strip plane 1514 are both right angles, while the angle between the first strip plane 1511 and the second strip plane 1512 is an acute angle. In this design, the inclination of the strip planes on both sides of the pentagonal prism structure is the same, which helps to improve the uniformity of the emitted light effect.

[0060] Figure 12 shows the end face or cross-section of the strip-shaped protrusion 151. By stretching the shape of Figure 12 radially along the annular light-emitting surface 130 by one end, a strip-shaped protrusion 151 in this application can be obtained.

[0061] In another alternative scheme, as shown in Figure 12, the intersection of the fifth strip plane 1515 and the cross-section is side A1, the intersection of the first strip plane 1511 and the cross-section is side A2, the intersection of the second strip plane 1512 and the cross-section is side A3, the intersection of the third strip plane 1513 and the cross-section is side A4, and the intersection of the fourth strip plane 1514 and the cross-section is side A5. See Table 2 below:

[0062] Table 2

[0063] From Table 2 above, we can obtain the pentagon shown in Figure 12. Then, we extend the pentagon in Figure 12 by 2.1 mm in a direction perpendicular to the pentagon to obtain a strip-shaped protrusion 151. Of course, the parameters of the strip-shaped protrusion 151 are not limited to the data in Table 2. The parameters of the strip-shaped protrusion 151 can fluctuate within ±10%.

[0064] In another alternative design, the light-incident surface 140 can be a concave arc, which is rotationally symmetrical about the central axis W1 of the light guide 100. In this case, the convex arc has a more precise angular contraction effect on light rays diverging at small angles. Therefore, by setting the light-incident surface 140 as a concave arc, it is possible to better contract small-angle light rays. In addition, since the light-incident surface 140 is concave inward, the light source 200 can be located within the concave area, which helps to reduce the stacking thickness of the light guide 100 and the light source 200, thereby helping to reduce the size of the supplementary lighting.

[0065] In another alternative embodiment, the light-incident surface 140 is formed by rotating the second curve around the central axis W1 of the light guide 100. Here, the second curve is the surface profile of the light-incident surface 140, which refers to the line segment that forms a specified contour after rotating one revolution around a certain rotation position.

[0066] In one specific scheme, as shown in Figure 9, the parameters of the second curve are shown in Table 3 below:

[0067] Table 3

[0068] The coordinate parameters in Table 3 determine the second curve, which is obtained by rotating it from 0° to 360° around the central axis W1 of the light guide 100, thus obtaining the surface profile of the light incident surface 140. Of course, the parameters of the second curve, such as the maximum curvature, minimum curvature, and curve length, are not limited to the data in Table 3. The parameters of the second curve can fluctuate within ±10%.

[0069] Of course, the second curve in the above embodiments is not limited to a spline curve, but can also be a Bézier curve. A Bézier curve can be 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.

[0070] In another alternative embodiment, the light guide 100 may have multiple concave regions 111 on the side facing away from the light source 200, forming a first reflective surface 110. The light source 200 may include multiple light-emitting elements 210, and each concave region 111 may be positioned opposite to at least one light-emitting element 210. In this embodiment, by providing multiple concave regions 111 and multiple light-emitting elements 210, the luminous intensity of the supplementary light can be further improved, thereby improving the luminous efficiency of the supplementary light. Furthermore, since each concave region 111 can be positioned opposite to at least one light-emitting element 210, this further ensures that the light emitted by each light-emitting element 210 can be accurately transmitted.

[0071] Furthermore, the concave region 111 is formed by rotating the first curve around the central optical axis W2 of the light-emitting element 210 corresponding to the concave region 111. Here, the first curve represents the surface linearity of the concave region 111. The surface profile of each concave region 111 in this application is obtained by rotating its corresponding first curve around the central optical axis W2 of the light-emitting element 210 corresponding to each concave region 111. Here, the central optical axis W2 refers to the optical axis at the center of a single light-emitting element 210 or the physical centerline of a single light-emitting element 210. The central axis W1 of the light guide 100 can also refer to the physical center or the optical axis at the center of the overall device composed of multiple light-emitting elements 210. Therefore, the central axis W1 of the light guide 100 and the central optical axis W2 of the light-emitting element 210 are different axes.

[0072] Specifically, the first curve rotates around the central optical axis W2 of the light-emitting element 210 to form a conical surface. The vertex of the conical surface passes through the first curve, which can also be considered as the generatrix of the concave region 111.

[0073] In this scheme, the concave region 111 is obtained by rotating the first curve around the central optical axis W2 of the light-emitting element 210. Therefore, by optimizing the shape of the first curve, the shape of the first reflective surface 110 can be further optimized, thereby achieving precise light guiding. This allows the light to reach the annular light-emitting surface 130 with the fewest reflections, thereby further improving the light energy emitted from the annular light-emitting surface 130 and further improving the optical performance of the supplementary light.

[0074] The first curve here can also be a spline curve.

[0075] In one alternative scheme, as shown in Figure 9, the parameters of the first curve are shown in Table 4 below:

[0076] Table 4

[0077] The coordinate parameters in Table 4 can determine the first curve. By rotating the first curve around the central optical axis W2, the surface profile of the concave region 111 can be obtained. Of course, the parameters such as the maximum curvature, minimum curvature, and curve length of the first curve are not limited to the data in Table 4. The data parameters of the first curve can fluctuate within ±10%.

[0078] The aforementioned concave regions 111 can all be drawn using the parameters in Table 4.

[0079] In another alternative embodiment, the plurality of concave regions 111 are rotationally symmetrical about the central axis W1 of the light guide 100. This arrangement enables a more uniform distribution of reflected light intensity on the first reflective surface 110 in its circumferential direction, thereby making the light from the supplementary lamp more uniform and further improving the optical performance of the supplementary lamp.

[0080] Furthermore, the light guide 100 may also have a planar region 112 on the side opposite to the light source 200. The planar region 112 surrounds multiple concave regions 111, and the annular light-emitting surface 130 can surround the planar region 112 and be parallel to it. The planar region 112 and the multiple concave regions 111 together form a first reflective surface 110. In this design, the planar region 112 can prevent the edge reflection angle of the first reflective surface 110 from being too large, thus further improving the optical performance of the supplementary light.

[0081] Specifically, the outer diameter of the planar region 112 is the inner diameter of the annular light-emitting surface 130, and the inner diameter of the planar region 112 is the outer diameter of the region formed by the multiple concave regions 111.

[0082] In another alternative embodiment, the supplementary light may further include a light-shielding member 300 and a lens 400. The light-shielding member 300 may be located between the lens 400 and the light guide member 100. The light-shielding member 300 may include a first light-shielding portion 310 and a second light-shielding portion 320. The first light-shielding portion 310 may surround the second light-shielding portion 320, and an annular light-transmitting area 301 may be formed between the first light-shielding portion 310 and the second light-shielding portion 320. The annular light-transmitting area 301 may be disposed opposite to the annular light-emitting surface 130. In this embodiment, the first light-shielding portion 310 and the second light-shielding portion 320 can cover the area of ​​the light guide member 100 other than the annular light-emitting surface 130, thereby making the appearance of the supplementary light closer to the appearance color of the electronic device's casing, thus improving the appearance consistency of the electronic device.

[0083] Optionally, the cover 300 can be an ink screen printing structure, or other light-shielding structures, which are not limited herein. The lens 400 can be made of transparent materials, such as transparent glass or transparent resin. This can also be understood as the lens 400 being an exposed component of the fill light.

[0084] In one alternative design, the incident surface 140 is an arc-shaped concave surface, which serves as the first light distribution structure. The first reflecting surface 110 is formed by multiple concave regions 111, which serve as the second light distribution structure. The second reflecting surface 120 is formed by splicing together multiple isosceles trapezoidal reflective surfaces, and serves as the third light distribution structure. This design further improves light control, thereby enhancing the supplementary lighting efficiency and achieving ultra-high brightness, square-shaped supplementary lighting spots.

[0085] An illuminance distribution experiment was conducted on the projection surface at a projection distance of 1000mm for the technical solution disclosed in this application. The coverage field of view was rectangular with a maximum field of view of ±30°. It was observed that the illuminance decreased uniformly with the increase of the field of view and presented a square light spot effect. With the emission energy of 200 light source being 110 lumen, the center illuminance can reach up to 900 lux. The supplementary lighting illuminance is more than 10 times that of existing products, which can greatly improve the night scene photography capability of mobile phones.

[0086] Based on the fill light disclosed in the embodiments of this application, the embodiments of this application also disclose an electronic device, which includes the fill light described in any of the embodiments above.

[0087] The electronic device disclosed in this application may further include a housing and a circuit board 500. The housing provides a mounting base for other components of the electronic device. The light guide 100 may be disposed on the housing, and the light source 200 may be disposed on the circuit board 500. Here, the circuit board 500 may be the main board or a sub-board of the electronic device. The light source 200 may be disposed on the circuit board 500, and the circuit board 500 supplies power to the light source 200 of the supplementary lighting assembly, while controlling the on and off of the light source 200.

[0088] In one specific embodiment, the housing may have mounting holes, and the aforementioned light guide 100 may be installed inside the housing.

[0089] 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.

[0090] 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, comprising a light guide and a light source; The light guide has a first reflective surface, a second reflective surface, an annular light-emitting surface, and a light-incident surface. The light-incident surface and the annular light-emitting surface are located on opposite sides of the light guide. The light-emitting source is arranged opposite to the light-incident surface. The first reflective surface and the annular light-emitting surface are located on the same side of the light guide. The light-incident surface is arranged opposite to the first reflective surface. The second reflective surface is arranged around the light-incident surface. wherein The annular light-emitting surface is provided with a radial texture structure, which includes a plurality of strip-shaped protrusions. The plurality of strip-shaped protrusions are arranged at intervals along the circumference of the annular light-emitting surface, and each strip-shaped protrusion extends radially along the annular light-emitting surface. The light emitted by the light source is reflected by the first reflective surface and the second reflective surface and then emitted from the annular light-emitting surface.

2. The light supplement lamp of claim 1, wherein, The light transmittance of the annular light-emitting surface is a first light transmittance, and the light transmittance of each of the strip-shaped protrusions is a second light transmittance, wherein the first light transmittance is less than the second light transmittance.

3. The light supplement lamp of claim 1, wherein, The distance between any point on the second reflective surface and the central axis of the light guide is the first distance, and the first distance gradually decreases in the direction from the annular light-emitting surface to the light-incident surface. The second reflective surface is composed of multiple trapezoidal reflective surfaces spliced ​​together, and the multiple trapezoidal reflective surfaces are arranged circumferentially along the light guide.

4. The light supplement lamp of claim 3, wherein, Any two of the trapezoidal reflective surfaces are rotationally symmetrical about the central axis of the light guide; the trapezoidal reflective surface is an isosceles trapezoidal structure, and the upper base and lower base of the trapezoidal reflective surface are arranged along the direction from the annular light-emitting surface to the light-incident surface.

5. The light supplement lamp of claim 1, wherein, The strip-shaped protrusion has a first strip-shaped plane and a second strip-shaped plane. Both the first strip-shaped plane and the second strip-shaped plane extend radially along the annular light-emitting surface. The first strip-shaped plane and the second strip-shaped plane are arranged circumferentially along the annular light-emitting surface. Both the first strip-shaped plane and the second strip-shaped plane are located on the side of the strip-shaped protrusion away from the annular light-emitting surface. The edge of the first strip-shaped plane on the side away from the annular light-emitting surface intersects with the edge of the second strip-shaped plane on the side away from the annular light-emitting surface.

6. The light supplement lamp of claim 5, wherein, The strip-shaped protrusion also has a third strip-shaped plane, a fourth strip-shaped plane, and a fifth strip-shaped plane. The third, fourth, and fifth strip-shaped planes all extend radially along the annular light-emitting surface. The first, second, third, fourth, and fifth strip-shaped planes intersect sequentially along the circumference of the strip-shaped protrusion. The fourth strip-shaped plane is in contact with the annular light-emitting surface. The third and fifth strip-shaped planes are located on opposite sides of the strip-shaped protrusion and are parallel to each other. The angle between the first and fifth strip-shaped planes and the angle between the second and third strip-shaped planes are both obtuse angles.

7. The light supplement lamp of claim 6, wherein, The angles between the third and fifth strip planes and the fourth strip plane are all right angles, while the angle between the first and second strip planes is an acute angle.

8. The light supplement lamp of claim 1, wherein, The light-incident surface is an arc-shaped concave surface, and the arc-shaped concave surface is rotationally symmetrical about the central axis of the light guide.

9. The light supplement lamp of claim 8, wherein, The light guide has multiple concave regions on the side away from the light source, and the multiple concave regions form the first reflective surface; the light source includes multiple light-emitting elements, each concave region is disposed opposite to at least one light-emitting element, and the concave region is formed by rotating a first curve around the central optical axis of one of the light-emitting elements corresponding to the concave region; the multiple concave regions are rotationally symmetrical about the central axis of the light guide.

10. The light supplement lamp of claim 9, wherein, The light guide component also has a planar region on the side away from the light source. The planar region surrounds multiple concave regions. The annular light-emitting surface surrounds the planar region and is parallel to the planar region. The planar region and the multiple concave regions together form the first reflective surface.

11. The light supplement lamp of claim 1, wherein, The supplementary light also includes a light-shielding component and a lens. The light-shielding component is located between the lens and the light guide component. The light-shielding component includes a first light-shielding part and a second light-shielding part. The first light-shielding part surrounds the second light-shielding part, and an annular light-transmitting area is formed between the first light-shielding part and the second light-shielding part. The annular light-transmitting area is disposed opposite to the annular light-emitting surface.

12. An electronic device comprising a housing, a circuit board, and a supplementary light according to any one of claims 1 to 11, wherein the light guide is disposed on the housing, and the light source is disposed on the circuit board.

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