Fill light and electronic device

Abstract

A fill light (100) and an electronic device. The fill light (100) comprises a light guide member (110), a first light-emitting source (121) and a second light-emitting source (122), wherein the light guide member (110) has a first surface (1101) and a second surface (1102) that are arranged opposite each other, the first surface (1101) is provided with an annular light-emitting surface (111) and a groove (112), the groove (112) comprising a side surface (1121) and a bottom surface (1122), the annular light-emitting surface (111) being arranged around an opening of the groove (112), and the side surface (1121) being arranged around the bottom surface (1122); the first light-emitting source (121) and the second light-emitting source (122) are both arranged on the side where the second surface (1102) of the light guide member (110) is located, and are arranged opposite the annular light-emitting surface (111); and light rays emitted by the first light-emitting source (121) and the second light-emitting source (122) enter the light guide member (110) via the second surface (1102), are reflected by an inner wall surface of the light guide member (110), and are then emitted from the annular light-emitting surface (111).

Description

Fill lights and electronic equipment

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202410687299.6, filed on May 30, 2024, entitled “Supplemental Light and Electronic Device”, the entire contents of which are incorporated herein by reference. Technical Field

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

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

[0005] Among related technologies, ring-shaped soft lights have gradually replaced traditional flash fill lights due to their unique advantages such as soft and natural light, moderate brightness, and continuous illumination.

[0006] However, in the related technology, the wide-angle light from the light source of the fill light is absorbed by the light-shielding ink after passing through the lampshade. Therefore, the wide-angle light of the fill light cannot be effectively utilized, resulting in poor luminous efficiency and uneven light output of the fill light. Summary of the Invention

[0007] In a first aspect, this application discloses a supplementary lighting lamp, including a light guide, a first light source, and a second light source; the light guide has a first surface and a second surface disposed opposite to each other, the first surface is provided with an annular light-emitting surface and a groove, the groove includes a side surface and a bottom surface, the annular light-emitting surface is disposed around the opening of the groove, and the side surface is disposed around the bottom surface; the first light source and the second light source are both disposed on one side of the second surface of the light guide, and the annular light-emitting surfaces are disposed opposite to each other; the light emitted by the first light source and the second light source enters the light guide through the second surface, and after being reflected by the inner wall surface of the light guide, it is emitted from the annular light-emitting surface.

[0008] Secondly, this application discloses an electronic device, including a housing, a circuit board, and the aforementioned supplementary light, wherein the light guide is disposed on the housing, and the first light source and the second light source are both disposed on the circuit board.

[0009] In this embodiment, the first surface of the light guide is provided with an annular light-emitting surface and a groove. The annular light-emitting surface surrounds the opening of the groove. In this case, along the direction from the bottom of the groove to its opening, the position of the annular light-emitting surface is higher than the bottom surface. In this design, the side of the groove is located inside the annular light-emitting surface. Therefore, when a large-angle light from the light source shines on the side, the side of the groove can reflect the large-angle light from the light source, and part of the reflected light is directed towards the position of the annular light-emitting surface. This effectively utilizes the large-angle light from the light source, thus enabling the supplementary light to emit light uniformly and improving the luminous efficiency of the supplementary light. Attached Figure Description

[0010] Figure 1 is a schematic diagram of a fill light disclosed in related technologies;

[0011] Figures 2 and 3 are exploded views of a fill light disclosed in an embodiment of this application;

[0012] Figures 4 and 5 are cross-sectional views of a supplementary light disclosed in an embodiment of this application;

[0013] Figure 6 is a cross-sectional view of a light guide for a supplementary light disclosed in an embodiment of this application;

[0014] Figures 7 to 9 are schematic diagrams of the structure of a light guide for a supplementary light disclosed in an embodiment of this application.

[0015] Explanation of reference numerals in the attached drawings: 100-Supplemental light, 110-Light guide, 1101-First surface, 111-Annular light-emitting surface, 1111-Concave dimming area, 1111a- 1111b - Second concave dimming area, 112 - Groove, 1121 - Side surface, 1122 - Bottom surface, 1102 - Second surface, 1102a - First area, 1102b - Second area, 1102c - Third area, 113 - Light-incident surface, 113a - Annular groove, 114 - Protrusion, 121 - First light-emitting source, 122 - Second light-emitting source, 130 - Second reflector, 131 - First clearance notch, 132 - Second clearance notch, 140 - Light-shielding element, 141 - First light-shielding part, 142 - Second light-shielding part, 143 - Annular light-transmitting area, 150 - Lampshade, 160 - First reflector, 200 - Circuit board, H1 - First distance, H2 - Second distance. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. 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.

[0017] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such 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.

[0018] As shown in Figure 1, the supplementary lighting 100 includes a light guide 110, a first light source 121, and a second light source 122. The first light source 121 and the second light source 122 can be LED (Light Emitting Diode) lamps, high-pressure sodium lamps, metal halide lamps, etc. Of course, the first light source 121 and the second light source 122 of the supplementary lighting 100 can also have other structures, which are not limited in this paper. The light guide 110 is a light transmission component, through which the light emitted by the first light source 121 and the second light source 122 is transmitted.

[0019] Specifically, the light guide 110 has a first surface 1101 and a second surface 1102 arranged opposite to each other, and the first surface 1101 is provided with an annular light-emitting surface 111. The first light source 121 and the second light source 122 are both disposed on the same side of the second surface 1102 of the light guide 110, and the annular light-emitting surfaces 111 are opposite to each other. Here, the first light source 121 and the second light source 122 can be centrally symmetrically arranged about the central axis of the light guide 110. The light emitted by the first light source 121 and the second light source enters the light guide 110 through the second surface 1102 and then exits through the annular light-emitting surface 111.

[0020] However, as shown in Figure 1, the large-angle light from the first light source 121 and the second light source 122 is directed to the lampshade 150 through the light guide 110 and then absorbed by the light-shielding ink on the lampshade 150. Therefore, the large-angle light from the supplementary light lamp 100 cannot be effectively utilized, resulting in uneven light output and poor luminous efficiency of the supplementary light lamp 100.

[0021] 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.

[0022] Please refer to Figures 2 to 9. In the supplementary lighting 100 disclosed in this application embodiment, the first surface 1101 is further provided with a groove 112. The groove 112 includes a side surface 1121 and a bottom surface 1122. An annular light-emitting surface 111 is arranged around the opening of the groove 112, and the side surface 1121 is arranged around the bottom surface 1122. At this time, the groove 112 is located in the inner region of the annular light-emitting surface 111. Since the annular light-emitting surface 111 is arranged around the opening of the groove 112, the position of the annular light-emitting surface 111 is higher than the position of the bottom surface 1122 in the direction from the bottom of the groove 112 to its opening. Therefore, there is a height difference between the annular light-emitting surface 111 and the bottom surface 1122, which is the height of the side surface 1121. At this time, some of the large-angle light rays from the first light source 121 and the second light source 122 can illuminate the side surface 1121 of the groove 112, so the side surface 1121 of the groove 112 can reflect the large-angle light rays.

[0023] Specifically, the small-angle light emitted by the first light source 121 and the second light source 122 passes through the second surface 1102 and directly strikes the annular light-emitting surface 111, and is emitted from the annular light-emitting surface 111. Meanwhile, some of the large-angle light from the first light source 121 and the second light source 122 illuminates the side surface 1121 of the groove 112, and is then reflected by the side surface 1121 of the groove 112 before being emitted from the annular light-emitting surface 111.

[0024] In the embodiments disclosed in this application, the side surface 1121 of the groove 112 is located inside the annular light-emitting surface 111. Therefore, when the light from the light source at a large angle shines on the side surface 1121, the side surface 1121 of the groove 112 can reflect the light from the light source at a large angle, and part of the reflected light is directed toward the position of the annular light-emitting surface 111. This can effectively utilize the light from the light source at a large angle, improve the light emission uniformity of the light-emitting surface, and further improve the luminous efficiency of the supplementary light lamp 100.

[0025] Furthermore, some of the large-angle light rays from the first light source 121 and the second light source 122, after passing through the bottom surface 1122 or the side surface 1121, will also be refracted by the bottom surface 1122 or the side surface 1121 of the groove 112 and re-enter the light guide 110, and thus exit from the annular light-emitting surface 111. Therefore, the light guide 110 is provided with a groove 112, which increases the inner wall surface of the light guide 110 for reflection or refraction. After the light is reflected by the inner wall surface of the light guide 110, it is emitted from the annular light-emitting surface 111.

[0026] In the embodiments disclosed in this application, the first surface 1101 of the light guide 110 is provided with a groove 112, thereby increasing the inner wall surface of the light guide 110 that can reflect or refract light, which is more conducive to improving the luminous efficiency of the supplementary light lamp 100.

[0027] In the above embodiment, the edge of the side surface 1121 facing away from the bottom surface 1122 can be a certain distance away from the inner ring edge of the annular light-emitting surface 111. At this time, the edge of the side surface 1121 facing away from the bottom surface 1122 is the groove edge of the groove 112, that is, the groove edge of the groove 112 can be a certain distance away from the inner ring edge of the annular light-emitting surface 111.

[0028] In another alternative embodiment, the edge of the side surface 1121 facing away from the bottom surface 1122 may coincide with the inner ring edge of the annular light-emitting surface 111. In this case, the groove edge of the groove 112 may coincide with the inner ring edge of the annular light-emitting surface 111. This design prevents light from passing through the gap between the groove edge of the groove 112 and the inner ring edge of the annular light-emitting surface 111, thus further improving the light utilization rate of the supplementary light lamp 100 and consequently increasing the luminous intensity of the supplementary light lamp 100.

[0029] In another alternative embodiment, the supplementary light 100 may further include a first reflector 160, which may be disposed in the recess 112. The first reflector 160 has a first reflective surface located on the side facing the inner surface of the recess 112. In this case, the first reflector 160 covers the inner surface of the recess 112, which includes the side surface 1121 and the bottom surface 1122 mentioned above. Therefore, the first reflector 160 covers both the side surface 1121 and the bottom surface 1122 of the recess 112. In this case, both the side surface 1121 and the bottom surface 1122 of the recess 112 are reflective surfaces.

[0030] In this scheme, the first reflector 160 can return the light passing through the side surface 1121 and the bottom surface 1122 back into the light guide 110, so that it can be reused by the light guide 110. Therefore, the utilization efficiency of the light from the first light source 121 and the second light source 122 can be further improved.

[0031] Optionally, the first reflector 160 may be a reflective film, or the first reflector 160 may be a reflective coating deposited on the inner surface of the groove 112.

[0032] In the above embodiment, the bottom surface 1122 of the groove 112 is disposed opposite to the second surface 1102. At this time, the light reflected by the bottom surface 1122 will be transmitted to the second surface 1102 opposite to it. Since the second surface 1102 is a light-transmitting surface, the light reflected by the bottom surface 1122 will be emitted from the light guide 110 through the second surface 1102. Therefore, this part of the light will be wasted, thereby reducing the light utilization efficiency of the supplementary light 100.

[0033] Based on this, in another alternative embodiment, as shown in Figure 4, the supplementary light 100 may further include a second reflector 130, which may be disposed on the second surface 1102. The second reflector 130 has a second reflective surface, which may be located on the side of the second reflector 130 facing the second surface 1102. In this case, the second reflective surface is disposed opposite to the second surface 1102, and the second surface 1102 can be a reflective surface.

[0034] The second reflector 130 has a first clearance notch 131 and a second clearance notch 132. The first clearance notch 131 is positioned opposite to the first light source 121. In this case, the first clearance notch 131 exposes the area of ​​the second surface 1102 opposite to the first light source 121, thus preventing the light emitted by the first light source 121 from being blocked by the second reflector 130, allowing the light emitted by the first light source 121 to enter the light guide 110 through the first clearance notch 131. The second clearance notch 132 can be positioned opposite to the second light source 122. In this case, the second clearance notch 132 exposes the area of ​​the second surface 1102 opposite to the second light source 122, thus preventing the light emitted by the second light source 122 from being blocked by the second reflector 130, allowing the light emitted by the second light source 122 to enter the light guide 110 through the second clearance notch 132.

[0035] In the specific working process, as shown in Figure 4, the light reflected from the bottom surface 1122 to the second surface 1102 can be returned to the light guide 110 by the second reflector 130. At this time, after multiple reflections between the bottom surface 1122 and the second surface 1102, the light can be transmitted back to the annular light-emitting surface 111, so this part of the light can be reused.

[0036] In this design, a portion of the large-angle light emitted by the first light source 121 and the second light source 122 can be reflected multiple times by the bottom surface 1122 and the second surface 1102 before exiting from the annular light-emitting surface 111. This further improves the light utilization rate of the first light source 121 and the second light source 122. Simultaneously, it also further improves the energy efficiency of the supplementary lighting.

[0037] Furthermore, in the light guide 110 disclosed in this application, the second surface 1102 is covered by the second reflector 130, except for the area opposite to the first light source 121 and the second light source 122. This prevents reflected light from escaping from the second surface 1102, thus further avoiding light waste and resulting in better optical performance of the supplementary light.

[0038] Optionally, the second reflector 130 may be a reflective film, or the second reflector 130 may be a reflective coating deposited on the inner surface of the groove 112.

[0039] In related technologies, the light spots formed by the first light source 121 and the second light source 122 are deviated from the center position of the supplementary light lamp 100, thus causing the illuminance distribution on the projection surface of the supplementary light lamp 100 to be uneven.

[0040] Based on this, in another optional embodiment, the second surface 1102 may be provided with a light-incident surface 113, which may be disposed opposite to both the light-emitting source and the annular light-emitting surface 111. The light-incident surface 113 may be provided with a plurality of continuously arranged annular grooves 113a. In this scheme, the groove wall of each annular groove 113a can be precisely dimmed. Therefore, by optimizing the angle of the groove wall of the annular groove 113a, the refraction angle of the light can be precisely controlled, so that the emitted light from the first light-emitting source 121 and the second light-emitting source 122 is closer to the center position of the supplementary light lamp 100. Therefore, the light spots formed by the first light-emitting source 121 and the second light-emitting source 122 have a greater degree of overlap, thereby making the illumination distribution of the projection surface of the supplementary light lamp 100 uniform.

[0041] In the above embodiments, the second surface 1102 as a whole can serve as the light incident surface 113, and therefore the second surface 1102 as a whole can be provided with a plurality of continuously arranged annular grooves 113a. However, the area of ​​the light incident surface 113 actually required by the first light source 121 and the second light source 122 is very small. Therefore, if the second surface 1102 is provided with annular grooves 113a as a whole, it will increase the manufacturing cost of the light guide 110, and thus increase the manufacturing cost of the supplementary light 100.

[0042] Based on this, in another optional embodiment, the second surface 1102 may include a first region 1102a, a second region 1102b, and a third region 1102c. The first region 1102a may surround the second region 1102b, and the second region 1102b may surround the third region 1102c. The second region 1102b may be a light-incident surface 113. In this case, since the first light-emitting light source 121 and the second light-emitting light source 122 are arranged opposite to the annular light-emitting surface 111, the light-incident surface 113 also needs to be arranged opposite to the annular light-emitting surface 111. Therefore, the second region 1102b is a partial annular structure region on the second surface 1102 that is arranged opposite to the annular light-emitting surface 111. Here, the first region 1102a is the region located outside the light-incident surface 113, while the third region 1102c is the region located within the inner ring of the light-incident surface 113.

[0043] In this scheme, the annular groove 113a is only set on the second region 1102b, thus simplifying the manufacturing process of the light guide 110. Therefore, while improving the uniformity of the illuminance distribution on the projection surface of the supplementary light 100, it is also possible to reduce the manufacturing cost of the supplementary light 100.

[0044] In the above embodiments, the second reflector 130 can be divided into three parts, as shown in Figures 1 and 2. The second reflector 130 may include a first reflective area, a second reflective area, and a third reflective area. The first reflective area surrounds the second reflective area, and the second reflective area surrounds the third reflective area. In this case, the first reflective area can be positioned opposite to the first region 1102a mentioned above, the second reflective area can be positioned opposite to the second region 1102b mentioned above, and the third reflective area can be positioned opposite to the third region 1102c mentioned above. The third reflective area can also be understood as being positioned opposite to the bottom surface 1122 of the groove 112. As shown in Figures 3 and 4, the bottom surface 1122 of the groove 112 is positioned opposite to the third reflective area. Figures 3 and 4 only illustrate the third reflective area of ​​the second reflector 130. As shown in Figure 2, the first clearance notch 131 and the second clearance notch 132 mentioned above are opened on the first reflection area and the second reflection area. Therefore, due to the existence of the first clearance notch 131 and the second clearance notch 132, the first reflection area and the second reflection area are cut into two semi-circular structures.

[0045] In one design, multiple consecutively arranged annular grooves 113a can be concentrically positioned. This design allows for a more uniform distribution of light intensity from the supplementary lighting 100.

[0046] In another alternative embodiment, the distance between each annular groove 113a and the annular light-emitting surface 111 gradually decreases in the direction from the central axis of the light guide 110 toward its edge. Here, the central axis is an axis along the thickness direction of the light guide 110 and passing through the physical center of the light guide 110. The direction from the central axis of the light guide 110 toward its edge can be understood as the direction from the central region of the light guide 110 toward its side edge. Therefore, in the direction from the central region of the light guide 110 toward its side edge, the distance between the annular light-emitting surface 111 and the annular groove 113a gradually decreases. Thus, the closer the annular groove 112 is to the outer side of the light guide 110, the smaller the distance between it and the annular light-emitting surface 111.

[0047] In this scheme, multiple annular grooves 113a are arranged radially inward along the light guide 110, which makes the light spots of the first light source 121 and the second light source 122 closer to the center area of ​​the supplementary light lamp 100, thereby further improving the illuminance distribution on the projection surface of the supplementary light lamp 100, and thus making the illuminance distribution on the projection surface of the supplementary light lamp 100 more uniform.

[0048] In the above embodiments, the distance between the first surface 1101 or the annular light-emitting surface 111 and the bottom surface 1122 of the groove 112 is the depth of the groove 112. If the depth of the groove 112 is too large, it will affect the strength of the light guide 110 and also increase the processing difficulty of the light guide 110.

[0049] Therefore, in another optional embodiment, the distance between the first surface 1101 and the second surface 1102 can be a first distance H1, where the first distance H1 is the thickness of the light guide 110. The distance between the first surface 1101 and the bottom surface 1122 can be a second distance H2, where the second distance H2 is the depth of the groove 112. The difference between the first distance H1 and the second distance H2 can be greater than or equal to 0.3 mm. In this case, the difference between the thickness of the light guide 110 and the depth of the groove 112 can be greater than or equal to 0.3 mm.

[0050] This solution ensures that the groove 112 has a large side surface 1121 to reflect light, while also ensuring the structural strength of the light guide 110 and reducing the processing difficulty of the light guide 110.

[0051] In related technologies, the light spots formed by the first light source 121 and the second light source 122 are deviated from the center position of the supplementary light lamp 100, thus causing the illuminance distribution on the projection surface of the supplementary light lamp 100 to be uneven.

[0052] In one optional embodiment, the annular light-emitting surface 111 includes a concave dimming region 1111, which is used to control the emission direction of light. The first light source 121 and the second light source 122 are both disposed opposite to the concave dimming region 1111. Here, the concave dimming region 1111 is recessed towards the light guide 110, and the concave surface can converge the light.

[0053] In this scheme, the light spots of the first light source 121 and the second light source 122 can be adjusted toward the center area of ​​the supplementary light lamp 100 through the concave dimming area 1111, so that the light spots of the first light source 121 and the second light source 122 have a good degree of overlap, thereby making the illumination of the projection surface of the supplementary light lamp 100 uniformly distributed.

[0054] The concave dimming area 1111 on the annular light-emitting surface 111 is used to control the light on the light-emitting side of the light guide 110. The annular groove 113a on the light-incident surface 113 is used to control the light on the light-incident side of the light guide 110.

[0055] In another alternative embodiment, the annular light-emitting surface 111 may include a concave dimming area 1111, and the light-incident surface 113 may be provided with multiple continuously arranged annular grooves 113a. In this case, the light emitted by the first light source 121 and the second light source 122 undergoes light regulation once through the annular grooves 113a when it enters the light guide 110. When the light is emitted, the final emission direction is further regulated by the concave dimming area 1111. At this point, through precise regulation of the annular grooves 113a and both sides of the concave dimming area 1111, the illuminance on the projection surface of the supplementary light lamp 100 can be more uniformly distributed.

[0056] In the above embodiments, the annular light-emitting surface 111 can be a concave structure overall. However, only the areas of the first light-emitting source 121 and the second light-emitting source 122 opposite to the annular light-emitting surface 111 can play a role in controlling the light. Therefore, setting the annular light-emitting surface 111 as a concave structure will increase the design and manufacturing difficulty.

[0057] Based on this, in another optional embodiment, the number of concave dimming regions 1111 can be at least two, namely a first concave dimming region 1111a and a second concave dimming region 1111b, with the first light source 121 disposed opposite to the first concave dimming region 1111a. The second light source is disposed opposite to the second concave dimming region 1111b.

[0058] Specifically, the annular light-emitting surface 111 is provided with a first concave dimming area 1111a and a second concave dimming area 1111b corresponding to the first light-emitting light source 121 and the second light-emitting light source 122. Therefore, the area on the annular light-emitting surface 111 other than the first concave dimming area 1111a and the second concave dimming area 1111b can be set as a planar area, which facilitates design and manufacturing.

[0059] In this scheme, only the area on the annular light-emitting surface 111 opposite to the first light-emitting source 121 and the second light-emitting source 122 is set as the concave dimming area 1111, and the other areas can be set as planar areas. Therefore, the design and manufacturing process of the light guide 110 is simplified, thereby reducing the manufacturing cost of the light guide 110.

[0060] In an optional embodiment, the first concave dimming region 1111a can be formed by rotating a first curve about the central optical axis of the first light source 121. Here, the central optical axis of the first light source 121 can refer to the physical center line of the first light source 121, or the optical axis at the center of the first light source 121. The first curve represents the surface linearity of the first concave dimming region 1111a. The surface contour of the first concave dimming region 1111a in this application is obtained by rotating its corresponding first curve around the central optical axis of the first light source 121. It should be understood that the central axis of the light guide 110 is the central optical axis of the supplementary light 100, but not the central optical axis of the first light source 121. The central optical axis of the first light source 121 is eccentrically positioned relative to the central axis of the light guide 110; therefore, the central axis of the light guide 110 and the central optical axis of the first light source 121 are different axes.

[0061] In this scheme, the first concave dimming area 1111a is obtained by rotating the first curve around the central optical axis of the first light source 121. Therefore, by optimizing the shape of the first curve, the surface shape of the first concave dimming area 1111a can be further optimized, thereby achieving precise light guiding and further controlling the light angle, thus further improving the optical performance of the supplementary light lamp 100.

[0062] In one alternative scheme, as shown in Figure 3, the parameters of the first curve are shown in Table 1 below:

[0063] Table 1

[0064] The coordinates of the data parameters in Table 1 can determine the first curve. By rotating the first curve around the central optical axis of the first light source 121, the surface profile of the first concave dimming region 1111a 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 1. The data parameters of the first curve can fluctuate within ±10%.

[0065] Of course, the first 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 position, the starting angle, the starting tangent length, the ending position, the ending angle, and the ending tangent length.

[0066] Similarly, the second concave dimming region 1111b can be formed by rotating the second curve around the central optical axis of the second light source 122. Here, the central optical axis of the second light source 122 can refer to the physical center line of the second light source 122, or the optical axis at the center of the second light source 122. The second curve here represents the surface linearity of the second concave dimming region 1111b. The surface contour of the second concave dimming region 1111b in this application is obtained by rotating its corresponding second curve around the central optical axis of the second light source 122. It is important to understand that the central axis of the light guide 110 is the central optical axis of the supplementary light 100, but not the central optical axis of the second light source 122. The central optical axis of the second light source 122 is eccentrically positioned relative to the central axis of the light guide 110; therefore, the central axis of the light guide 110 and the central optical axis of the second light source 122 are different axes.

[0067] In this scheme, the second concave dimming area 1111b is obtained by rotating the second curve around the central optical axis of the second light source 122. Therefore, by optimizing the shape of the second curve, the surface shape of the second concave dimming area 1111b can be further optimized, thereby achieving precise light guiding and further controlling the light angle, thus further improving the optical performance of the supplementary light lamp 100.

[0068] The surface shape of the first concave dimming region 1111a in this application is the same as that of the second concave dimming region 1111b. Therefore, the first curve is the same as the second curve. Thus, the linear parameters of the first curve and the linear parameters of the second curve can be the same. Therefore, the parameters in Table 1 above can also be used to determine the second curve. Therefore, this article will not elaborate further.

[0069] In one alternative embodiment, the first concave dimming region 1111a and the second concave dimming region 1111b can be arranged symmetrically about the central axis of the light guide 110. This embodiment enables a more uniform illuminance distribution of the first light source 121 and the second light source 122 in the circumferential direction of the annular light-emitting surface 111, thereby making the light from the supplementary light lamp 100 more uniform and further improving the optical performance of the supplementary light lamp 100.

[0070] Of course, this application does not limit the specific number of light sources. The number of concave dimming areas 1111 on the light guide 110 can be set according to the specific number of light sources. It should be noted that each light source needs to be set relative to the concave dimming area 1111.

[0071] In the embodiments disclosed in this application, the supplementary light 100 may further include a light-shielding member 140 and a lampshade 150, with the light-shielding member 140 located between the lampshade 150 and the light guide member 110. The light-shielding member 140 may include a first light-shielding portion 141 and a second light-shielding portion 142, with the first light-shielding portion 141 surrounding the second light-shielding portion 142, and an annular light-transmitting area 143 formed between the first light-shielding portion 141 and the second light-shielding portion 142, the annular light-transmitting area 143 being disposed opposite to the annular light-emitting surface 111.

[0072] In this scheme, the first light-shielding part 141 and the second light-shielding part 142 can cover the area on the surface of the light guide 110 facing the lamp cover 150 except for the annular light-emitting surface 111, thereby making the appearance of the supplementary light 100 closer to the appearance color of the electronic device housing, thus improving the appearance consistency of the electronic device.

[0073] Optionally, the cover can be an ink screen printing structure, or other light-shielding structures, which are not limited herein. The lampshade 150 can be made of transparent materials, such as transparent glass or transparent resin. This can also be understood as the lampshade 150 being an exposed component of the supplementary light 100.

[0074] In another alternative embodiment, the edge of the light guide 110 has a protrusion 114, which is disposed opposite to the first light-shielding portion 141. Here, the protrusion 114 extends in a direction away from the first region 1102a.

[0075] In this design, the protrusion serves as a foolproof feature for the light guide 110, thus avoiding the risk of misalignment during installation and improving the assembly accuracy of the supplementary light 100. Furthermore, the third region 1102c of the light guide 110 and the protrusion can form a mounting area, through which the light guide 110 can be connected to the housing of the electronic device, facilitating its fixation.

[0076] In another alternative embodiment, the supplementary light 100 may further include a diffusion film that covers the annular light-emitting surface 111. In this embodiment, the diffusion film can disperse the light emitted from the annular light-emitting surface 111, thereby making the light emitted by the supplementary light 100 softer and increasing the field of view of the supplementary light 100.

[0077] When conducting an illuminance distribution experiment on the projection surface at a projection distance of 1000mm using the scheme disclosed in this application, the coverage field of view of the supplementary light 100 was rectangular, with a maximum field of view of ±40°. It was observed that the illuminance decreased uniformly with increasing field of view, and the overlap between the light spots of the first light source 121 and the second light source 122 was relatively large. Therefore, it can be seen that the supplementary light 100 disclosed in this application exhibits uniform illuminance distribution on the projection surface and good luminous efficiency.

[0078] Based on the fill light 100 disclosed in the embodiments of this application, the embodiments of this application also disclose an electronic device, which includes the fill light 100 described in any of the embodiments above.

[0079] The electronic device disclosed in this application may further include a housing and a circuit board 200. The housing provides a mounting base for other components of the electronic device. The light guide 110 may be disposed on the housing. The first light source 121 and the second light source 122 may both be disposed on the circuit board 200. Here, the circuit board 200 may be the main board or a sub-board of the electronic device. The first light source 121 and the second light source 122 of the fill light 100 may be disposed on the circuit board 200, and the circuit board 200 supplies power to the first light source 121 and the second light source 122 of the fill light 100, and simultaneously controls the opening and closing of the first light source 121 and the second light source 122.

[0080] In one specific embodiment, the housing may have mounting holes, into which the lampshade 150 can be installed, and the light guide 110 can be installed inside the housing. The light guide 110 can be connected to the housing of the electronic device via the protrusion 114.

[0081] 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.

[0082] 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, a first light source, and a second light source; The light guide has a first surface and a second surface arranged opposite to each other. The first surface is provided with an annular light-emitting surface and a groove. The groove includes a side surface and a bottom surface. The annular light-emitting surface is arranged around the opening of the groove, and the side surface is arranged around the bottom surface. The first light source and the second light source are both disposed on one side of the second surface of the light guide, and the annular light-emitting surfaces are disposed opposite to each other; the light emitted by the first light source and the second light source enters the light guide through the second surface, and after being reflected by the inner wall surface of the light guide, it is emitted from the annular light-emitting surface.

2. The supplementary lighting according to claim 1, wherein, The supplementary light also includes a first reflector disposed in the groove, the first reflector having a first reflective surface located on the side facing the inner surface of the groove.

3. The supplementary lighting according to claim 1 or 2, wherein, The supplementary light also includes a second reflector disposed on the second surface. The second reflector has a second reflective surface located on the side of the second reflector facing the second surface. The second reflector has a first clearance notch and a second clearance notch. The first clearance notch is disposed opposite to the first light source, and the second clearance notch is disposed opposite to the second light source.

4. The supplementary lighting according to claim 1, wherein, The second surface is provided with a light incident surface, which is disposed opposite to the first light source, the second light source, and the annular light emitting surface. The light incident surface is provided with a plurality of continuously arranged annular grooves.

5. The supplementary lighting according to claim 4, wherein, The second surface includes a first region, a second region, and a third region, wherein the first region surrounds the second region, the second region surrounds the third region, and the second region is the light-incident surface.

6. The supplementary lighting according to claim 4, wherein, In the direction from the central axis of the light guide toward its edge, the distance between each annular groove and the annular light-emitting surface gradually decreases.

7. The supplementary lighting according to claim 1, wherein, The distance between the first surface and the second surface is the first distance, and the distance between the first surface and the bottom surface is the second distance. The difference between the first distance and the second distance is greater than or equal to 0.3 mm.

8. The supplementary lighting according to claim 1, wherein, The annular light-emitting surface includes a concave dimming area, which is used to control the emission direction of light. The first light source and the second light source are both arranged opposite to the concave dimming area.

9. The supplementary lighting according to claim 8, wherein, The number of concave dimming areas is at least two, namely a first concave dimming area and a second concave dimming area. The first light source is arranged opposite to the first concave dimming area, and the second light source is arranged opposite to the second concave dimming area. The first concave dimming area and the second concave dimming area are symmetrically arranged about the central axis of the light guide.

10. The supplementary lighting according to claim 9, wherein, The first concave dimming area is formed by rotating a first curve about the central optical axis of the first light source; and / or, The second concave dimming area is formed by rotating the second curve around the central optical axis of the second light source.

11. The supplementary lighting according to claim 1, wherein, The supplementary light also includes a light-shielding component and a lampshade. The light-shielding component is located between the lampshade 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. The edge of the light guide component has a protrusion, and the protrusion is disposed opposite to the first light-shielding part.

12. The supplementary light according to claim 1, wherein, The edge of the side facing away from the bottom surface coincides with the inner ring edge of the annular light-emitting surface.

13. The supplemental lighting according to any one of claims 1 to 12, wherein, The supplemental light also includes a diffusion film that covers the annular light-emitting surface.

14. An electronic device comprising a housing, a circuit board, and a supplementary light according to any one of claims 1 to 13, wherein the light guide is disposed on the housing, and the first light source and the second light source are both disposed on the circuit board.

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