Light supplement lamp and electronic equipment

Abstract

The invention discloses a light supplementing lamp and electronic equipment, and belongs to the technical field of optical devices. The light guide part is provided with a first reflecting surface, a second reflecting surface, an annular light-emitting surface and a light-in surface, the light-in surface and the annular light-emitting surface are located on the two opposite sides of the light guide part, the light-emitting source and the light-in surface are oppositely arranged, the first reflecting surface and the annular light-emitting surface are located on the same side of the light guide part, and the light-in surface and the first reflecting surface are oppositely arranged. The second reflecting surface is arranged around the light incident surface; wherein the annular light emitting surface is provided with a radial texture structure, the radial texture structure comprises a plurality of strip-shaped protrusions, the strip-shaped protrusions are arranged in the circumferential direction of the annular light emitting surface at intervals, and each strip-shaped protrusion extends in the radial direction of the annular light emitting surface; light emitted by the light-emitting light source is reflected by the first reflecting surface and the second reflecting surface and then is emitted from the annular light-emitting surface.

Description

Technical Field

[0001] The present application belongs to the technical field of optical devices, and in particular relates to a fill light and an electronic device. Background Art

[0002] As the imaging functions of electronic devices such as mobile phones continue to improve, the demand for taking photos with electronic devices is also increasing, and photo-taking scenes are emerging in an endless stream. It is difficult to take clear photos in low-light environments and night scenes, and it is also difficult to have a good experience in video or live broadcast scenes.

[0003] In order to provide electronic devices with a better user experience, in the related art, electronic devices are provided with fill lights, which can perform fill light operations in scenes such as dark light environments and night scene shooting, thereby improving the imaging effect of the electronic device.

[0004] However, in the related art, the light emitting surface of the fill light is usually a planar structure, which results in a relatively simple light emitting effect of the fill light. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide a fill light and an electronic device, which can solve the technical problem of the single light effect of the fill light.

[0006] In order to solve the above technical problems, this application is implemented as follows: A fill light comprises 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 two opposite sides of the light guide, the light 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, and the second reflective surface is arranged around the light incident surface; Among them, a radial texture structure is arranged on the annular light-emitting surface, and the radial texture structure includes a plurality of strip-shaped protrusions, and the plurality of strip-shaped protrusions are arranged at intervals along the circumference of the annular light-emitting surface, and each of the strip-shaped protrusions extends radially along the annular light-emitting surface; the light emitted by the luminous light source is reflected by the first reflecting surface and the second reflecting surface and then emitted from the annular light-emitting surface.

[0007] An electronic device comprises a housing, a circuit board and the above-mentioned fill light, wherein the light guide is arranged on the housing, and the light source is arranged on the circuit board.

[0008] In the embodiment of the present application, the annular light-emitting surface of the light guide has a radial texture structure, and the radial texture structure includes a plurality of strip-shaped protrusions, and 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 along the radial direction of the annular light-emitting surface. In this scheme, the annular light-emitting surface is provided with a radial texture structure, and the radial texture structure protrudes from the annular light-emitting surface. At this time, the radial texture structure will form a radial stripe-shaped light effect on the annular light-emitting surface, that is, a layer of radial stripe-shaped light effect is superimposed on the plane light effect, thereby enriching the light-emitting effect of the fill light, and further improving the diversity of the light-emitting effect of the fill light. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 and Figure 2 It is an exploded diagram of a fill light disclosed in an embodiment of the present application; Figures 3 to 7 It is a structural schematic diagram of a light guide of a fill light disclosed in an embodiment of the present application; Figure 8 and Fig. 9 is a cross-sectional view of a fill light disclosed in an embodiment of the present application; Fig.10 It is a partial enlarged view of a fill light disclosed in an embodiment of the present application; Fig.11 It is a schematic diagram of a radiation texture structure of a fill light disclosed in an embodiment of the present application; Fig.12 yes Fig.11 Schematic cross-section of .

[0010] Description of reference numerals: 100-light guide, 110-first reflecting surface, 111-concave area, 112-plane area, 120-second reflecting surface, 121-trapezoidal reflecting surface, 121a-first side line, 121b-second side line, 130-annular light emitting surface, 140-light incident surface, 150-radiating texture structure, 151-strip protrusions, 1511-first strip plane, 1512-second strip plane, 1513-third strip plane, 1514-fourth strip plane, 1515-fifth strip plane, 200-luminous light source, 210-luminous element, 300-shading element, 310-first shading portion, 320-second shading portion, 301-annular light transmitting area, 400-lens, 500-circuit board, W1-central axis, W2-central optical axis. DETAILED DESCRIPTION

[0011] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0012] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally represents that the objects associated with each other are in an "or" relationship.

[0013] The fill light and the electronic device provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in combination with the accompanying drawings.

[0014] Please refer to Figures 1 to 12 The embodiment of the present application discloses a fill light, which is applied to electronic equipment. The disclosed fill light includes a light guide 100 and a light source 200.

[0015] The light guide 100 is a light transmission component, and the light emitted by the luminous light source 200 is transmitted through the light guide 100. The light guide 100 can be made of transparent materials, such as transparent glass, transparent resin and other materials. The light guide 100 has a first reflection surface 110, a second reflection surface 120, an annular light emitting surface 130 and a light incident surface 140, and the light incident surface 140 and the annular light emitting surface 130 are located on opposite sides of the light guide 100. The luminous light source 200 is arranged opposite to the light incident surface 140, and the first reflection 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 arranged opposite to the first reflection surface 110, and the second reflection surface 120 is arranged around the light incident surface 140.

[0016] In the specific fill light process, the light emitted by the luminous light source 200 enters the light guide 100 through the light incident surface 140, and the light is transmitted to the first reflective surface 110, and then reflected by the first reflective surface 110 and emitted to the second reflective surface 120, and then emitted through the annular light emitting surface 130 after passing through the second reflective surface 120, so as to form a halo with soft light sense, moderate brightness, and sustainable light emission on the annular light emitting surface 130. Optionally, the luminous light source 200 can be an LED (Light Emitting Diode, semiconductor light emitting diode) lamp, a high-pressure sodium lamp, a metal halide lamp, etc. Of course, the luminous light source 200 of the fill light can also be other structures, which are not limited in this article.

[0017] In the embodiment disclosed in the present application, the light emitted by the luminous light source 200 is reflected between the first reflection surface 110 and the second reflection surface 120, so the first reflection surface 110 and the second reflection surface 120 form a double reflection structure. The double reflection structure can reduce the number of reflections of the light and can guide the light to the annular light-emitting surface 130 to the maximum extent, thereby greatly improving the luminous efficiency of the fill light. Therefore, even if the fill light has a single light source, it has sufficient energy. This solution guides light through a double reflection structure, thereby effectively reducing the number of light sources of the fill light, thereby making the fill light smaller in size, lower in cost, and better in heat dissipation performance, thereby improving the performance of the fill light.

[0018] In the fill light disclosed in the present application, a radial texture structure 150 is provided on the annular light emitting surface 130, and the radial texture structure 150 includes a plurality of strip-shaped protrusions 151, and the plurality of strip-shaped protrusions 151 are arranged at intervals along the circumference of the annular light emitting surface 130, and each strip-shaped protrusion 151 extends along the radial direction of the annular light emitting surface 130. It can be understood here that the axis of each strip-shaped protrusion 151 passes through the center of the annular light emitting surface 130, and at this time, each strip-shaped protrusion 151 can be understood as a spoke, so 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.

[0019] In the embodiment disclosed in the present application, the annular light-emitting surface 130 is a plane as a whole, so it forms an annular base light effect. A plurality of strip-shaped protrusions 151 are superimposed on the annular light-emitting surface 130, so a layer of radial stripe-shaped light effect is formed on the annular base light effect, thereby enriching the light-emitting effect of the fill light, making the light-emitting effect of the fill light more diverse, thereby improving the diversity of the light-emitting effect of the fill light, and thus improving the aesthetic appearance of the electronic device.

[0020] In addition, when the fill light is in a non-working state, external light can irradiate the radial texture structure 150, thereby illuminating the radial texture structure 150. Therefore, it can be clearly observed in appearance that the radial texture structure 150 is convex relative to the annular light-emitting surface 130, so that the radial texture structure can be observed, thereby making the overall appearance of the fill light more three-dimensional and diverse, thereby further improving the appearance performance of the electronic device.

[0021] In the above solution, the radial texture structure 150 can be integrally formed with the light guide 100, that is, the radial texture structure 150 is directly formed during the processing or injection molding of the light guide 100. Alternatively, the light guide 100 and the radial texture structure 150 can be separately provided, in which case the radial texture structure 150 can be fixed on the annular light emitting surface 130 by gluing.

[0022] Optionally, the light guide 100 and the radiant texture structure 150 can be made of the same material. Of course, the light guide 100 and the radiant texture structure 150 can be made of different materials. This is not limited herein.

[0023] In the above embodiment, the number of the strip-shaped protrusions 151 in the radial texture structure 150 may be 80. Of course, the number of the strip-shaped protrusions 151 may also be other numbers, which is not limited herein.

[0024] In the above solution, the transmittance of the annular light emitting surface 130 can be the first transmittance, the transmittance of each strip-shaped protrusion 151 can be the second transmittance, and the first transmittance can be equal to the second transmittance. At this time, the transmittance of the annular light emitting surface 130 is the same as the transmittance of the radial texture structure 150.

[0025] In another optional embodiment, the first light transmittance is less than the second light transmittance, and in this case, the light transmittance of the annular light emitting surface 130 is less than the light transmittance of the radial texture structure 150. It can also be understood here that the light transmittance of the area of ​​the annular light emitting surface 130 provided with the radial texture structure 150 is greater than the light transmittance of the area of ​​the annular light emitting surface 130 not provided with the radial texture structure 150.

[0026] In this solution, the transmittance of the radiation texture structure 150 is large, so the brightness is brighter, so the radiation texture light effect is more prominent and obvious, which is more conducive to highlighting the radiation texture light effect. In addition, the light transmittance of the annular light emitting surface 130 is small, which has a better scattering effect, and thus has a larger light emission angle, so it can further increase the emission angle of the light of the fill light, thereby increasing the light emitting field angle of the fill light.

[0027] Optionally, the fill light may further include a diffusion film, in which case a hole structure for avoiding the radial texture structure 150 is provided on the diffusion film, that is, the diffusion film is not attached to the radial texture structure 150, and the diffusion film is attached only to the area on the annular light-emitting surface 130 where the radial texture structure 150 is not provided. Alternatively, sandblasting and frosting are performed on the mold forming the light guide 100, so that the area on the annular light-emitting surface 130 where the radial texture structure 150 is not provided forms a frosted surface. Of course, other processes may also be used, which are not limited herein.

[0028] In the above solution, the circumferential side wall of the light guide 100 can form the second reflective surface 120 , where the circumferential side wall refers to the outer side wall of the light guide 100 , and thus the outer side wall of the light guide 100 forms the second reflective surface 120 .

[0029] In another optional solution, the first reflective surface 110, the second reflective surface 120, the light incident surface 140 and the annular light emitting surface 130 can all be rotationally symmetric about the central axis W1 of the light guide 100. The central axis W1 here refers to the axis of the central position of the light guide 100 or the physical center line of the light guide 100. In this solution, since the first reflective surface 110, the second reflective surface 120, the annular light emitting surface 130 and the light incident surface 140 are all rotationally symmetric about the central axis W1 of the light guide 100. Therefore, the illumination distribution of the reflected light of the first reflective surface 110 and the second reflective surface 120 in the circumferential direction is uniform, so that the light of the fill light is more uniform. In addition, the reflection structure of the fill light disclosed in the present application adopts a coaxial double reflection rotationally symmetric structure, so the circumferential luminous intensity of the annular light emitting surface 130 is the same, so that the fill light has both sufficient luminous energy and good luminous uniformity, so the fill light has good optical performance.

[0030] 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 a first distance, and the first distance gradually decreases in the direction from the annular light emitting surface 130 to the light incident surface 140. The first distance here refers to the perpendicular distance between any end of the second reflective surface 120 and the central axis W1. Since the second reflective surface 120 is a rotationally symmetrical structure, the first distance of all points on the circumference of the same radius of the second reflective surface 120 is the same.

[0031] In this scheme, in the direction from the annular light-emitting surface 130 to the light-incident surface 140, the second reflecting surface 120 is a tapered structure, that is, the edge area of ​​the second reflecting surface 120 at one end facing the annular light-emitting surface 130 is larger than the edge area of ​​the second reflecting surface 120 at one end 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 the light reflected to the outer edge, thereby further improving the reflection performance of the light, and further improving the light distribution and guiding performance of the second reflection.

[0032] In another optional solution, the second reflective surface 120 may be formed by rotating a curve with the central axis W1 of the light guide 100 as the rotation axis. The curve here is the surface line type of the second reflective surface 120, and the surface line type here refers to a line segment that forms a specified contour after rotating one circle along a certain rotation position. The curve may be a Bezier curve or a spline curve. Of course, the curve may also be other structural curves, which are not limited herein.

[0033] In this solution, the second reflective surface 120 is obtained by rotating the third curve around the central axis W1 of the light guide 100 for one circle. Therefore, the surface shape of the second reflective surface 120 can be further optimized by optimizing the line shape of the third curve, thereby achieving precise light guiding and further improving the optical performance of the fill light.

[0034] In another optional embodiment, the second reflective surface 120 can be formed by splicing a plurality of trapezoidal reflective surfaces 121, and the plurality of trapezoidal reflective surfaces 121 are arranged along the circumference of the light guide 100. In this solution, the scale texture effect on the second reflective surface 120 can be significantly observed in appearance, thereby further improving the appearance performance of the electronic device. In addition, the reflective surface area of ​​the trapezoidal structure is large, so it is not easy to affect the reflection performance. Therefore, the present application can effectively improve the appearance performance of the electronic device without affecting the reflection performance.

[0035] The light guide 100 in the present application can be realized by a casting process, in which case the surface of the processing mold can have a trapezoidal scale array, which can be transferred to the light guide 100. Alternatively, the trapezoidal scale array of the light guide 100 in the present application can be cut by mechanical processing.

[0036] In the above scheme, multiple trapezoidal reflective surfaces 121 can be connected end to end in sequence along the circumference of the light guide 100. In this case, the upper base of the trapezoidal reflective surface 121 is connected to the lower base of another trapezoidal reflective surface 121 to form a ring surface structure in sequence. 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, the upper base of one trapezoidal reflective surface 121 faces the annular light emitting surface 130, and the upper base of the other trapezoidal reflective surface 121 faces the light incident surface 140. The upper base of the trapezoidal reflective surface 121 here is the short side of the trapezoid, and the lower base is the long side of the trapezoid.

[0037] In another optional solution, any two trapezoidal reflective surfaces 121 are rotationally symmetric about the central axis W1 of the light guide 100, that is, one trapezoidal reflective surface 121 rotates around the central axis W1 by a certain angle to obtain another trapezoidal reflective surface 121. Therefore, the outer contours of the multiple trapezoidal reflective surfaces 121 are the same. The trapezoidal reflective surfaces 121 are isosceles trapezoidal structures, and the upper base and the lower base of the trapezoidal reflective surface 121 are arranged along the direction from the annular light emitting surface 130 to the light incident surface 140. Figure 7As shown, the first side line 121a and the second side line 121b are two waists of a trapezoidal reflective surface 121, and the trapezoidal reflective surface 121 is an isosceles trapezoidal structure, so the first side line 121a and the second side line 121b are the same, and it can also be understood that the second side line 121b is formed by rotating the first side line 121a at a certain angle. In this solution, the second reflective surface 120 is formed by a plurality of rotationally symmetrical isosceles trapezoidal reflective surfaces. At this time, the reflection efficiency of each area is consistent, so the loss of the light distribution ability of the second reflective surface 120 is small, so the appearance texture effect is achieved on the basis of retaining the optical effect.

[0038] In the above embodiment, the second reflective surface 120 may be silver-plated, so after the scale array is formed, a dynamic shining effect will be produced as the viewing angle changes. Optionally, to meet the silver-plated process requirements, the light guide 100 may be made of PC (Polycarbonate), or other materials, which are not limited herein.

[0039] In a specific embodiment, the second reflecting surface 120 can be composed of 36 identical isosceles trapezoidal surfaces spliced ​​at a certain angle. At this time, a spline curve C is first determined. The spline curve C can be rotated at a certain angle around the central axis W1 of the light guide 100 to form a trapezoidal reflecting surface 121. The spline curve C here can be the waist of the trapezoidal reflecting surface 121, that is, the first side line 121a mentioned above. At this time, the spline curve C rotates 10° around the central axis W1 of the light guide 100 to obtain C1 with the same spline curve shape as the spline curve C but in a different position. The corresponding two endpoints of C and C1 are connected to obtain a trapezoidal surface, where the trapezoidal surface is the trapezoidal reflecting surface 121, and C1 here is the second edge line mentioned above. Similarly, the same 36 trapezoidal reflecting surfaces 121 are formed by splicing at a certain angle.

[0040] In a specific solution, the parameters of the spline curve C are shown in Table 1 below: Table 1

[0041] The data parameter coordinates in Table 1 can determine the spline curve C, where the spline curve C 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 a spline curve C1, where the spline curve C1 is the second side line 121b, and the corresponding two endpoints of C and C1 are connected to form a trapezoidal reflective surface 121. Of course, the maximum curvature, minimum curvature, and curve length of the spline curve C are not limited to the data in Table 1. The data parameters of the spline curve C can float between plus or minus ten percent.

[0042] Of course, the first side line 121a in the above embodiment is not limited to a spline curve, but can also be a Bezier curve. The Bezier curve can be determined by parameters such as the starting point position, starting point cutting angle, starting point tangent length, end point position, end point cutting angle, and end point tangent length.

[0043] In the above solution, the strip-shaped protrusion 151 can be a cylindrical or semi-cylindrical structure, where the cylindrical structure refers to a structure with a circular cross section, and the semi-cylindrical structure refers to a structure with a semicircular cross section.

[0044] In another optional solution, the strip-shaped protrusion 151 may be a prismatic structure. The strip-shaped protrusion 151 may have a first strip-shaped plane 1511 and a second strip-shaped plane 1512. The first strip-shaped plane 1511 and the second strip-shaped plane 1512 may both extend along the radial direction of the annular light-emitting surface 130. The first strip-shaped plane 1511 and the second strip-shaped plane 1512 may be arranged along the circumferential direction of the annular light-emitting surface 130. The first strip-shaped plane 1511 and the second strip-shaped plane 1512 are both located on the side of the strip-shaped protrusion 151 away from the annular light-emitting surface 130. The edge of the first strip-shaped plane 1511 away from the annular light-emitting surface 130 intersects with the edge of the second strip-shaped plane 1512 away from the annular light-emitting surface 130. At this time, the edge of the first strip-shaped plane 1511 away from the annular light-emitting surface 130 and the edge of the second strip-shaped plane 1512 away from the annular light-emitting surface 130 intersect to form a sideline. In this solution, compared with the planar structure, the user can more clearly observe the intersecting edge formed by the first strip plane 1511 and the second strip plane 1512, thereby further improving the appearance performance of the fill light.

[0045] In the above solution, the strip-shaped protrusion 151 may be a triangular prism structure. In this case, the other strip plane of the triangular prism structure except the first strip plane 1511 and the second strip plane 1512 is connected to the annular light emitting surface 130 .

[0046] In another optional solution, the strip-shaped protrusion 151 may be a pentagonal prism structure, that is, the strip-shaped protrusion 151 has five strip-shaped planes. Fig.11As shown, the strip-shaped protrusion 151 may also have a third strip plane 1513, a fourth strip plane 1514 and a fifth strip plane 1515, and the third strip plane 1513, the fourth strip plane 1514 and the fifth strip plane 1515 may all extend along the radial direction of the annular light-emitting surface 130, and the first strip plane 1511, the second strip plane 1512, the third strip plane 1513, the fourth strip plane 1514 and the fifth strip plane 1515 may intersect end to end in sequence along the circumferential direction of the strip-shaped protrusion 151. The fourth strip plane 1514 is in contact with the annular light-emitting surface 130. The fourth strip plane 1514 here is the bottom 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.

[0047] In this solution, the strip 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, so it can increase the refraction and scattering of light, thereby further improving the light output brightness and light effect of the fill light.

[0048] Furthermore, the angles between the third strip plane 1513 and the fifth strip plane 1515 and the fourth strip plane 1514 are all right angles, and the angle between the first strip plane 1511 and the second strip plane 1512 is an acute angle. In this solution, the inclinations of the strip planes on both sides of the pentagonal prism structure are the same, so it is beneficial to improve the uniformity of the light output effect.

[0049] Fig.12 is the end face or cross section of the strip-shaped protrusion 151. Fig.12 The shape of the ring-shaped light-emitting surface 130 is stretched along the radial direction by one end, so that a strip-shaped protrusion 151 in the present application can be obtained.

[0050] In another alternative, if Fig.12 As shown, the intersection line of the fifth strip plane 1515 and the cross section is the A1 side, the intersection line of the first strip plane 1511 and the cross section is the A2 side, the intersection line of the second strip plane 1512 and the cross section is the A3 side, the intersection line of the third strip plane 1513 and the cross section is the A4 side, and the intersection line of the fourth strip plane 1514 and the cross section is the A5 side. As shown in Table 2 below: Table 2

[0051] From Table 2 above, we can get Fig.12 The pentagon shown is then Fig.12The pentagon in FIG. 1 extends 2.1 mm in a direction perpendicular to the pentagon, thereby obtaining a strip-shaped protrusion 151. Of course, the parameters of the strip-shaped protrusion 151 are not limited to the data in Table 2, and the parameters of the strip-shaped protrusion 151 can float between plus or minus ten percent.

[0052] In another optional solution, the light incident surface 140 may be an arc-shaped concave surface, and the arc-shaped concave surface may be rotationally symmetric about the central axis W1 of the light guide 100. In this case, the arc-shaped convex surface has a more precise light angle contraction effect on light rays diverging at small angles. Therefore, by setting the light incident surface 140 as an arc-shaped concave surface, small-angle light rays can be better contracted. In addition, the light incident surface 140 is recessed inwardly, and the light source 200 can be located in the recessed area, which is beneficial to reduce the stacking thickness of the light guide 100 and the light source 200, thereby helping to reduce the volume of the fill light.

[0053] In another optional solution, the light incident surface 140 is formed by rotating the second curve with the central axis W1 of the light guide 100 as the rotation axis. The second curve here is the surface line shape of the light incident surface 140, and the surface line shape here refers to a line segment that forms a specified contour after rotating one circle along a certain rotation position.

[0054] In a specific embodiment, Fig. 9 As shown, the parameters of the second curve are shown in Table 3 below: Table 3

[0055] The data parameter coordinates in Table 3 can determine the second curve, and the second curve is rotated from 0° to 360° around the central axis W1 of the light guide 100 to obtain the surface profile of the light incident surface 140. Of course, the parameters such as the maximum curvature, the minimum curvature and the curve length of the second curve are not limited to the data in Table 3. The data parameters of the second curve can float between plus or minus ten percent.

[0056] Of course, the second curve in the above embodiment is not limited to a spline curve, but can also be a Bezier curve. The Bezier curve can be determined by parameters such as the starting point position, the starting point tangent angle, the starting point tangent length, the end point position, the end point tangent angle, and the end point tangent length.

[0057] In another optional solution, a plurality of concave areas 111 may be provided on the side of the light guide 100 facing away from the light source 200, and the plurality of concave areas 111 form a first reflective surface 110. The light source 200 may include a plurality of light emitting elements 210, and each concave area 111 may be arranged opposite to at least one light emitting element 210. In this solution, by providing a plurality of concave areas 111 and a plurality of light emitting elements 210, the luminous intensity of the fill light can be further improved, thereby improving the luminous energy efficiency of the fill light. In addition, each concave area 111 can be arranged opposite to at least one light emitting element 210, thereby further ensuring that the light emitted by each light emitting element 210 can be accurately transmitted.

[0058] Further, the concave area 111 is formed by rotating the first curve with the central optical axis W2 of a light-emitting component 210 corresponding to the concave area 111 as the rotation axis; the first curve here is the surface linearity of the concave area 111, and the surface contour of each concave area 111 in the present application is obtained by rotating the corresponding first curve around the central optical axis W2 of the light-emitting component 210 corresponding to each concave area 111. The central optical axis W2 here refers to the optical axis at the center position of a single light-emitting component 210 or the physical center line of a single light-emitting component 210. The central axis W1 of the above-mentioned 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 components 210. Therefore, the central axis W1 of the light guide 100 and the central optical axis W2 of the light-emitting component 210 are different axes.

[0059] Specifically, the first curve is rotated around the central optical axis W2 of the light emitting element 210 to form a conical surface, the vertex of which passes through the first curve. Here, the first curve can also be regarded as the generatrix of the concave area 111.

[0060] In this scheme, the concave area 111 is obtained by rotating the first curve around the central optical axis W2 of the light-emitting element 210 for one circle. Therefore, the line shape of the first curve can be optimized to further optimize the surface shape of the first reflecting surface 110, so as to achieve precise light guiding, so that the light can reach the annular light-emitting surface 130 with the least number of reflections, so as to further improve the light energy emitted from the annular light-emitting surface 130, thereby further improving the optical performance of the fill light.

[0061] The first curve here may also be a spline curve.

[0062] In an alternative approach, Fig. 9 As shown, the parameters of the first curve are shown in Table 4 below: Table 4

[0063] The data parameter coordinates in Table 4 can determine the first curve, and by rotating the first curve around the central optical axis W2, the surface profile of the concave area 111 is obtained. Of course, the parameters such as the maximum curvature, the minimum curvature and the curve length of the first curve are not limited to the data in Table 4. The data parameters of the first curve can float between plus or minus ten percent.

[0064] The above-mentioned multiple concave areas 111 can all be drawn using the parameters in Table 4.

[0065] In another optional embodiment, the plurality of concave areas 111 are rotationally symmetric about the central axis W1 of the light guide 100. This solution can make the illumination distribution of the reflected light of the first reflective surface 110 more uniform in its circumferential direction, thereby making the light of the fill light more uniform, thereby further improving the optical performance of the fill light.

[0066] Furthermore, a plane region 112 may be provided on the side of the light guide 100 facing away from the light source 200, the plane region 112 surrounds the plurality of concave regions 111, the annular light emitting surface 130 surrounds the plane region 112 and is parallel to the plane region 112, and the plane region 112 and the plurality of concave regions 111 may form a first reflection surface 110 together. In this solution, the plane region 112 can prevent the edge reflection angle of the first reflection surface 110 from being too large, thereby further improving the optical performance of the fill light.

[0067] 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 plurality of concave regions 111 .

[0068] In another optional solution, the fill light may further include a shading member 300 and a lens 400. The shading member 300 may be located between the lens 400 and the light guide 100. The shading member 300 may include a first shading portion 310 and a second shading portion 320. The first shading portion 310 may surround the second shading portion 320, and an annular light-transmitting area 301 may be formed between the first shading portion 310 and the second shading portion 320. The annular light-transmitting area 301 may be arranged opposite to the annular light-emitting surface 130. In this solution, the first shading portion 310 and the second shading portion 320 may cover the area of ​​the light guide 100 except the annular light-emitting surface 130, so that the appearance of the fill light is closer to the appearance color of the housing of the electronic device, thereby improving the appearance consistency of the electronic device.

[0069] Optionally, the cover 300 may be an ink silk-screen structure, or other light-shielding structures, which are not limited herein. The lens 400 may be made of a transparent material, such as transparent glass, transparent resin, etc. It can also be understood here that the lens 400 is the exposed part of the fill light.

[0070] In an optional solution, the light incident surface 140 is an arc-shaped concave surface, which is a first light distribution structure, and the first reflective surface 110 is formed by a plurality of the concave surface areas 111, which is a second light distribution structure, and the second reflective surface 120 is formed by splicing a plurality of isosceles trapezoidal reflective surfaces, which is a third light distribution structure. This solution can further improve the control effect of light, thereby improving the fill light energy efficiency, and thus achieving ultra-bright, square fill light spots.

[0071] An illuminance distribution experiment was conducted on the technical solution disclosed in the present application at a projection distance of 1000mm. The covered field of view was rectangular, and the maximum field of view was ±30°. It can be seen that the illuminance decayed evenly with the increase of the field of view and presented a square light spot effect. When the output energy of the light source 200 is 110lumen, the center illuminance can be as high as 900lux. The fill light illuminance is more than 10 times that of existing products, which can greatly enhance the night scene photography capability of the mobile phone.

[0072] Based on the fill light disclosed in the embodiments of the present application, the embodiments of the present application further disclose an electronic device, and the disclosed electronic device includes the fill light described in any of the above embodiments.

[0073] The electronic device disclosed in the present application may also 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. The circuit board 500 here may be a main board of the electronic device, 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 fill light assembly, and controls the opening and closing of the light source 200.

[0074] In a specific solution, the housing may be provided with a mounting hole, and the light guide member 100 may be mounted in the housing.

[0075] The electronic device disclosed in the embodiments of the present application may be a smart phone, a tablet computer, an e-book reader, a wearable device (such as a smart watch), an electronic game console, or the like. The embodiments of the present application do not limit the specific types of electronic devices.

[0076] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A fill light, characterized in that: including 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 two opposite sides of the light guide, the light 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, and the second reflective surface is arranged around the light incident surface; Among them, a radial texture structure is arranged on the annular light-emitting surface, and the radial texture structure includes a plurality of strip-shaped protrusions, and the plurality of strip-shaped protrusions are arranged at intervals along the circumference of the annular light-emitting surface, and each of the strip-shaped protrusions extends radially along the annular light-emitting surface; the light emitted by the luminous light source is reflected by the first reflecting surface and the second reflecting surface and then emitted from the annular light-emitting surface.

2. The fill light according to claim 1, characterized in that: The light transmittance of the annular light emitting surface is a first light transmittance, the light transmittance of each of the strip-shaped protrusions is a second light transmittance, and the first light transmittance is less than the second light transmittance.

3. The fill light according to claim 1, characterized in that: The distance between any point on the second reflective surface and the central axis of the light guide is a first distance, and in the direction from the annular light emitting surface to the light incident surface, the first distance gradually decreases; The second reflective surface is formed by splicing a plurality of trapezoidal reflective surfaces, and the plurality of trapezoidal reflective surfaces are arranged along the circumference of the light guide.

4. The fill light according to claim 3, characterized in that: Any two of the trapezoidal reflective surfaces are rotationally symmetric about the central axis of the light guide; the trapezoidal reflective surface is an isosceles trapezoidal structure, and the upper base and the 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 fill light according to claim 1, characterized in that: The strip-shaped protrusion has a first strip plane and a second strip plane, the first strip plane and the second strip plane both extend radially along the annular light-emitting surface, the first strip plane and the second strip plane are arranged circumferentially along the annular light-emitting surface, the first strip plane and the second strip plane are both located on the side of the strip-shaped protrusion away from the annular light-emitting surface, and the edge of the first strip plane away from the annular light-emitting surface intersects with the edge of the second strip plane away from the annular light-emitting surface.

6. The fill light according to claim 5, characterized in that: The strip-shaped protrusion also has a third strip plane, a fourth strip plane and a fifth strip plane, the third strip plane, the fourth strip plane and the fifth strip plane all extend radially along the annular light-emitting surface, the first strip plane, the second strip plane, the third strip plane, the fourth strip plane and the fifth strip plane intersect each other end to end in sequence along the circumference of the strip-shaped protrusion, the fourth strip plane is in contact with the annular light-emitting surface, the third strip plane and the fifth strip plane are located on opposite sides of the strip-shaped protrusion and are parallel to each other; the angle between the first strip plane and the fifth strip plane and the angle between the second strip plane and the third strip plane are both obtuse angles.

7. The fill light according to claim 6, characterized in that: The included angles between the third strip plane and the fifth strip plane and the fourth strip plane are all right angles, and the included angle between the first strip plane and the second strip plane is an acute angle.

8. The fill light according to claim 1, characterized in that: 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 component.

9. The fill light according to claim 8, characterized in that: A plurality of concave areas are arranged on the side of the light guide member facing away from the light source, and the plurality of concave areas form the first reflecting surface; the light source includes a plurality of light emitting members, each of the concave areas is arranged opposite to at least one of the light emitting members, and the concave areas are formed by rotating a first curve with the central optical axis of one of the light emitting members corresponding to the concave area as the rotation axis; and the plurality of concave areas are rotationally symmetrical about the central axis of the light guide member.

10. The fill light according to claim 9, characterized in that: A planar area is also provided on the side of the light guide member facing away from the light source, the planar area surrounds the multiple concave areas, the annular light emitting surface surrounds the planar area and is parallel to the planar area, and the planar area and the multiple concave areas together form the first reflecting surface.

11. The fill light according to claim 1, characterized in that: The fill light also includes a shading member and a lens, wherein the shading member is located between the lens and the light guide member, and the shading member includes a first shading portion and a second shading portion, wherein the first shading portion surrounds the second shading portion, and an annular light-transmitting area is formed between the first shading portion and the second shading portion, and the annular light-transmitting area is arranged opposite to the annular light-emitting surface.

12. An electronic device, characterized in that: The invention comprises a shell, a circuit board and the fill light according to any one of claims 1 to 11, wherein the light guide is arranged on the shell, and the light source is arranged on the circuit board.

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