CN118338164A - Speakers - Google Patents

Abstract

The application provides a sound box, which comprises a shell and an annular lamp, wherein an opening is formed in the shell; the annular lamp comprises a light source and a light guide plate, the light guide plate comprises a light inlet area and a light outlet area, and the distance from the periphery of the light inlet area to the central axis of the light guide plate is smaller than the distance from the inner ring of the light outlet area to the central axis; light emitted by the light source enters the light guide plate through the light entering area and is transmitted for a certain distance in the radial direction of the light guide plate, and then the light is emitted from the light emitting area; the radial direction of the light guide plate is perpendicular to the optical axis of the light guide plate, and the light guide plate is dispersed with a light diffusion agent; the light entering area comprises an indent cambered surface, the light rays irradiating the light entering area of the sound box can be perpendicular to the cambered surface of the light entering area, so that the light rays entering the light guide plate through the light entering area can not be reflected on the light entering section of the light entering area, the light rays can be ensured to enter the light guide plate completely, the number of light sources is small, and meanwhile, the larger light-emitting aperture is obtained, and the power consumption and the heat productivity of the annular lamp are reduced.

Description

Speakers

Technical Field

The present application relates to the field of electronic technology, and in particular to a speaker.

Background technique

A ring light is often added around the buttons of electronic devices or electrical products, such as mobile phones and speakers, to enhance their appearance. In order to obtain a larger light-emitting aperture, current ring lights are generally arranged by surrounding the light-emitting aperture with multiple light sources, and the light from the multiple light sources is transmitted to the light-emitting position, thereby obtaining a ring light. However, multiple surrounding light sources consume a lot of power and generate a lot of heat.

Summary of the invention

The present application provides a speaker, aiming to achieve a larger light emitting aperture of the speaker while reducing the power consumption and heat generation of the speaker.

In a first aspect, the present application provides a sound box, which includes a housing and a ring light, wherein the housing is provided with an opening, and the ring light is fixed in the housing. The ring light includes a light source and a light guide plate; the light guide plate includes a first surface and a second surface opposite to the first surface, a light entrance area is provided on the first surface, and an annular light exit area is provided on the second surface, the orthographic projection of the light entrance area on a reference plane is located in the area surrounded by the orthographic projection of the annular light exit area on the reference plane, wherein the reference plane is a plane perpendicular to the optical axis of the light guide plate; the light emitted by the light source enters the light guide plate through the light entrance area, and exits from the light exit area; the light entrance area includes a concave arc surface, and the light irradiated by the light source to the light entrance area is perpendicular to the arc surface.

The ring lights of some embodiments of the present application make the light rays irradiated to the light entrance area perpendicular to the curved surface of the light entrance area, so that the light rays incident into the light guide plate through the light entrance area will not be reflected on the light entrance interface of the light entrance area, thereby enabling all the light rays to enter the light guide plate and avoiding light loss, thereby improving the light utilization rate of the light sources, so that the light energy can be relatively sufficient when the number of light sources is small, so that the light rays can be transmitted over a longer distance in the light guide plate, that is, a larger light emitting aperture can be obtained when the number of light sources is small, thereby achieving a large light emitting aperture for the ring light and reducing the power consumption and heat generation of the ring light.

In some embodiments, the arc surface of the light entrance area is a smooth arc surface. In this embodiment, the light entrance area is a smooth arc surface, which can be formed relatively easily.

In some embodiments, the light entrance area includes a central area and a plurality of sub-areas arranged in sequence around the periphery of the central area, the plurality of sub-areas are in the shape of concentric rings, the central area and the sub-areas both include sub-arc surfaces and side surfaces, the side surfaces of the central area connect the sub-arc surfaces of the central area and the sub-arc surfaces of the sub-areas adjacent to the central area, the side surfaces of the sub-areas connect the sub-arc surfaces of two adjacent sub-areas, and the sub-arc surfaces of the central area and the sub-arc surfaces of the plurality of sub-areas form an arc surface of the light entrance area. In this embodiment, the light entrance area is a Fresnel surface, and the sub-arc surfaces of the Fresnel surface form an arc surface of the light entrance area of the present application, thereby preventing the light emitted by the light source from being reflected on the light entrance interface of the light entrance area, and reducing the degree of concavity of the light entrance area, thereby reducing the thickness of the light guide plate, and further reducing the thickness of the ring light, so as to facilitate the application of the ring light in the speaker.

In some embodiments, the light source is located on the side of the first surface of the light guide plate away from the second surface and is spaced apart from the light guide plate. By spacing the light source and the light guide plate apart, the light spot projected by the light source onto the light guide plate can cover the light entrance area of the light guide plate.

In some embodiments, the diameter of the annular light emitting area is 20 to 50 times the distance from the light source to the light guide plate. In this embodiment, since the ratio of the diameter of the light emitting area to the diameter of the light source to the light guide plate is relatively large, the annular light can obtain a larger aperture size with a relatively thin thickness, thereby achieving a good application effect.

In some embodiments, the light source is arranged opposite to the light entrance area, the center of the light source is located on the central axis of the light entrance area, and the light source includes a light emitting surface, which faces the light guide plate. In this embodiment, the center of the light source is located on the central axis of the light entrance area, so that the light from the light source to each position of the light entrance area can be more uniform, and then the light from each position of the light exit area can be more uniform, achieving a good light exit effect.

In some embodiments, the surface of the light guide plate is covered with a reflective layer, and the reflective layer is hollowed out in the light entrance area and the light exit area. In this embodiment, the surface of the light guide plate except the light entrance area and the light exit area is covered with a reflective layer, so that the light in the light guide plate can be fully reflected when it is transmitted to the surface of the light guide plate, and the light after total reflection can continue to be transmitted in the light guide plate, thereby preventing the light from leaking from other positions of the light guide plate except the light exit area or being absorbed by the light guide plate, further improving the light utilization rate, and allowing the light to be transmitted over a greater distance in the light guide plate.

In some embodiments, the reflective layer is a metal plating layer or is formed by special treatment of the outer surface.

In some embodiments, the side of the reflective layer facing away from the light guide plate is covered with a light shielding layer. In this embodiment, the side of the reflective layer facing away from the light guide plate is covered with a light shielding layer, that is, the surface of the light guide plate except the light entrance area and the light exit area is covered with a light shielding layer, so as to prevent light from leaking from other positions outside the light exit area of the light guide plate through the light shielding layer, thereby ensuring that the ring light has a better lighting effect.

In some embodiments, the surface of the light guide plate is covered with black and white glue, which includes a white film layer and a black ink layer. The black ink layer is formed on the white film layer and forms an integral structure with the white film layer; the white film layer is a reflective layer, and the black ink layer is a light shielding layer. In this embodiment, the reflective layer and the light shielding layer can be an integral structure, and the reflective layer and the light shielding layer can be formed on the surface of the light guide plate through a single process, which can reduce the process and reduce the cost.

In some embodiments, a light diffuser is dispersed in the light guide plate. The light diffuser reflects or refracts the light entering the light guide plate, so that the light is evenly dispersed in the light guide plate, and the light can be transmitted over a longer distance inside the light guide plate, so that the light emitted by the light source can be transmitted farther in the light guide plate without changing the light source, so that a larger aperture can be obtained with fewer light sources, thereby reducing the power consumption and heat generation of the ring light.

In some embodiments, the ring light further includes a decorative panel, which is disposed in an area surrounded by the light emitting area, and is used to enhance the appearance of the ring light.

In some embodiments, an annular protrusion is provided in the annular light-emitting area of the second surface, and the end face of the annular protrusion facing away from the light guide plate is the light-emitting surface. The decorative plate is embedded in the annular space surrounded by the annular protrusion, and the side of the decorative plate facing away from the light guide plate is coplanar with the light-emitting surface, so that the ring light has a better appearance.

In some embodiments, the ring light further includes a fixing portion and a plurality of connecting arms, wherein the fixing portion is located at the periphery of the light guide plate and is spaced apart from the light guide plate, and the plurality of connecting arms are connected between the light guide plate and the fixing portion, and the connecting arms are elastic. In the embodiment of the present application, the fixing portion is used to fix the light guide plate. Furthermore, because the connecting arms are elastic, when the fixing portion is fixed, the connecting arms will produce elastic deformation when the light guide plate is subjected to a force in the axial direction of the light guide plate (i.e., in a direction parallel to the central axis), and when the force on the light guide plate is removed, the light guide plate can return to its original position.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the structural features and functions of the present application, it is described in detail below in conjunction with the accompanying drawings and specific embodiments.

FIG1 is a schematic diagram of the structure of a speaker in some embodiments of the present application;

FIG2 is an exploded view of the ring light of the speaker shown in FIG1 from one direction;

FIG3 is an exploded view of the ring light of the speaker shown in FIG1 from another direction;

FIG4 is a cross-sectional view of the ring light of the embodiment shown in FIG2 along the II-II direction;

FIG5 is an enlarged schematic diagram of a light incident area of a light guide plate according to some other embodiments of the present application;

FIG6 is a partial cross-sectional schematic diagram of the light guide plate of the embodiment shown in FIG5 along the II-II direction;

FIG7 is a radiation diagram of a light source of some embodiments of the present application;

FIG8 is a schematic diagram of the structure of a ring light according to some other embodiments of the present application;

FIG9 is an enlarged structural diagram of position II of the ring light in the embodiment shown in FIG4 ;

FIG10 is a cross-sectional schematic diagram of a ring light according to some other embodiments of the present application;

FIG11 is a cross-sectional schematic diagram of a ring light according to some other embodiments of the present application;

FIG12 is a top view of a ring light according to some other embodiments of the present application;

FIG13 is a schematic cross-sectional view of the ring light shown in FIG12 along the direction I-I;

Fig. 14 is a partial cross-sectional schematic diagram of the speaker of the embodiment shown in Fig. 1 along the I-I direction.

Detailed ways

The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

The present application provides a speaker, which is provided with a ring light to enhance the appearance of the speaker. For example, a ring light is provided on the speaker so that the ring light is on when the speaker is working, thereby enhancing the appearance of the speaker, and the working state of the speaker can be judged according to the working state of the ring light. Alternatively, a ring light is provided at the button position of a mobile phone or a speaker so that the light emitting aperture of the ring light surrounds the button setting, which can improve the appearance of the mobile phone or the speaker, and can also mark the position of the mobile phone button or the speaker button for easy use in the dark night. Please refer to Figure 1, which is a schematic diagram of the structure of a speaker 200 of the present application. In this embodiment, the speaker 200 is an electronic speaker. The speaker 200 includes a device housing 110 and a ring light 100. The device housing 110 is provided with an opening 111, and the ring light 100 is fixed in the device housing 110.

Please refer to FIG. 2, which is a schematic diagram of the structure of the ring light 100 of the speaker 200 shown in FIG. 1. The ring light 100 includes a light source 10 and a light guide plate 20. The light source 10 is located on one side of the light guide plate 20 and is at a certain distance from the light guide plate 20. After the light emitted by the light source 10 is incident on the light guide plate 20, it is transmitted in the light guide plate 20 for a certain distance and then emitted, thereby obtaining a ring-shaped aperture. The ring light 100 includes a light guide plate 20, and a light emitting area 221 for emitting light is provided on the light guide plate 20. Among them, the light emitting area 221 is ring-shaped. When the ring light 100 is fixed in the light guide plate 20, the light emitting area 221 of the light guide plate 20 is exposed from the device housing 110 through the opening 111. When the ring light 100 emits light, a ring-shaped aperture can be generated to improve the appearance of the speaker 200. Among them, the ring-shaped light emitting area 211 can be a ring of various shapes such as a circular ring, a square ring, a triangular ring, etc. according to actual needs. In this embodiment, the light emitting area 211 of the ring light 100 is in the shape of a circular ring, so that a circular light emitting aperture can be obtained. In some embodiments, the ring light 100 further includes a circuit board 30 , and the light source 10 is fixed on the circuit board 30 .

The light guide plate 20 is made of a light-guiding material, so that light can be transmitted in the light guide plate 20. The light guide plate 20 can be made of glass, resin, acrylic or other materials. In some embodiments, a light diffuser is dispersed in the light guide plate 20, and the light diffuser can be an inorganic micropowder (such as titanium dioxide) or an organic micropowder (such as acrylic or silicone). The light diffuser reflects or refracts the light entering the light guide plate 20, so that the light is evenly dispersed in the light guide plate 20, and the light can be transmitted farther inside the light guide plate 20, so that the light emitted by the light source 10 can be transmitted farther in the light guide plate 20 without changing the light source 10, so that a larger aperture can be obtained with fewer light sources 10, and the power consumption and heat generation of the ring light 100 can be reduced. For example, in some embodiments, the light diffuser is an organic micropowder, the material of which is different from that of the light guide plate 20, and can allow light to pass through. The light transmitted in the light guide plate 20 is refracted when it is transmitted to the organic powder, so that the relatively strong light emitted by the light source 10 is evenly dispersed after refraction, thereby expanding the light-emitting surface, making the light at each position in the light guide plate 20 more uniform, and avoiding the problem of insufficient light intensity when the light is transmitted to the light-emitting position. In addition, through the refraction of the organic powder, the light transmitted to the inner wall surface of the light guide plate 20 is reduced, and the light intensity loss caused by multiple reflections of the light on the inner wall surface of the light guide plate 20 is reduced, further improving the utilization rate of the light and extending the transmission distance of the light.

Please refer to FIG. 2 and FIG. 3, which are schematic structural diagrams of the ring light 100 of the speaker 200 in different directions of the embodiment shown in FIG. 1. The light guide plate 20 includes a first surface 21 and a second surface 22 opposite to the first surface 21. The light source 10 is located on the side of the first surface 21 away from the second surface 22. Specifically, please refer to FIG. 2, a light entrance area 211 is provided on the first surface 21, and the light emitted by the light source 10 enters the light guide plate 20 from the light entrance area 211. The light entrance area 211 is an area surrounded by the periphery 211a of the light entrance area 211. Please refer to FIG. 3, a ring-shaped light exit area 221 is located on the second surface 22. The light exit area 221 includes an inner ring 221a and an outer ring 221b surrounding the outer side of the inner ring 221a (i.e., the side of the inner ring 221a away from the center), and the light exit area 221 is the area between the inner ring 221a and the outer ring 221b. The light is emitted from the light emitting area 221, thereby obtaining an annular aperture. In this embodiment, the shape of the light emitting area 221 is a circular ring, and the inner ring 221a and the outer ring 221b are concentric rings, so that the distance from any position of the inner ring 221a to the outer ring 221b is the same, thereby obtaining an annular aperture with uniform width at each position, achieving a better decorative effect. It is understandable that in some embodiments, according to the actual decorative effect requirements, the centers of the inner ring 221a and the outer ring 221b may not overlap, and the inner ring 221a and the outer ring 221b may also be of different shapes.

Please refer to FIG. 4 , which is a schematic cross-sectional view of the ring light 100 of the embodiment shown in FIG. 2 along the II-II direction. In the embodiment of the present application, the orthographic projection of the light entrance area 211 on the reference plane is located in the area surrounded by the orthographic projection of the annular light exit area 221 on the reference plane. That is, the orthographic projection of the light entrance area 211 on the reference plane is located within the orthographic projection of the inner ring 221a of the light exit area 221 on the reference plane. The reference plane is a plane perpendicular to the central axis a of the light guide plate 20. In other words, the distance L2 from the periphery 211a of the light entrance area 211 to the central axis a of the light guide plate 20 is less than the distance L3 from the inner ring 221a of the light exit area 221 to the central axis a, and the light incident into the light guide plate 20 through the light entrance area 211 needs to be transmitted for a certain distance in the radial direction of the light guide plate 20 (perpendicular to the central axis a direction) before it can be emitted from the light exit area 221. In the case of the same aperture size, the light incident through the light entrance area 211 can be transmitted in the radial direction of the light guide plate 20 for a certain distance before being emitted from the light exit area 221. Compared with the method of making the light of the light source 10 directly irradiate the position on the first surface 22 opposite to the light exit area 221, and then transmitting the light along the axial direction (the direction parallel to the central axis a) of the light guide plate 20 to the light exit area 221 and emitting the light, since the size of the light entrance area 211 is smaller than the size of the inner ring 221a of the light exit area 221, the area covered by the light emitted by the light source 10 can be smaller, so the light source 10 can be closer to the light guide plate 20, thereby reducing the thickness of the ring light 100. Specifically, when the light cannot be transmitted in the radial direction of the light guide plate 20 and then emitted from the light exit area 221, if a larger light-emitting aperture is required, the distance between the light source 10 and the light guide plate 20 needs to be farther, so that the light spot size irradiated by the light source 10 on the light guide plate 20 is larger and covers the range of the light-emitting aperture, so that the light-emitting aperture can emit light. In the present application, the light incident from the light entrance area 211 is transmitted to the light exit area 221 along the radial direction of the light guide plate 20 by the light guide plate 20 for a certain distance, so that the distance between the light source 10 and the light guide plate 20 can be smaller, so that the distance between the light source 10 and the light guide plate 20 can be closer when the same aperture size is obtained, so that the size of the light spot irradiated by the light source 10 on the light guide plate 20 only covers the light entrance area 211, thereby reducing the thickness of the ring light 100, so as to facilitate the application of the ring light 100 in the speaker. In some embodiments of the present application, the radial dimension of the annular light exit area 221 is 20 to 50 times the distance L1 from the light source 10 to the light guide plate 20. Among them, the radial dimension of the light exit area 221 is twice the distance L3 from the outer ring 221b to the central axis a. In this embodiment, since the light emitting area 221 is in the shape of a circular ring and the outer ring 221b is in the shape of a circular ring, the radial dimension of the light emitting area 221 is the diameter of the outer ring 221b. In some embodiments, when the light emitting area 221 is in the shape of a square ring or a triangular ring, the radial dimension of the light emitting area 221 is the diameter of the circumscribed circle of the outer ring 221b of the light emitting area 221. The distance from the light source 10 to the light guide plate 20 refers to the vertical distance from the center of the light source 10 to the plane perpendicular to the central axis of the light guide plate 20 and passing through the center of the light guide plate 20. In some embodiments, the central axis of the light source 10 coincides with the central axis of the light guide plate 20, in which case the distance between the center of the light source 10 and the center of the light guide plate 20 is the distance between the center of the light source 10 and the center of the light guide plate 20.

In some embodiments, the shape of the light entrance area 211 is the same as the shape of the light exit area 221 of the ring light 100, and the center of the light entrance area 211 is coaxial with the center of the light exit area 221. That is, the distance from the edge of the light entrance area 211 to each position of the light exit area 221 is the same. When the light of the light source 10 enters the light guide plate 20 in all directions uniformly, the light intensity transmitted to each position of the light exit area 221 of the ring light 100 through the light guide plate 20 is the same, so that each position of the ring light 100 can emit light uniformly. For example, when the shape of the light exit area 221 of the ring light 100 is circular, the shape of the light entrance area 211 is also circular; when the shape of the light exit area 221 of the ring light 100 is square, the shape of the light entrance area 211 is also square. Among them, the shape of the light entrance area 211 refers to the edge contour shape of the light entrance area 211, and the shape of the light exit area 221 of the ring light 100 refers to the shape surrounded by the aperture. In this embodiment, the center of the light incident area 211 and the center of the light exit area 221 are both located on the central axis a of the light guide plate 20 .

The light entry area 211 includes an arc surface that is concave from the first surface 21 to the second surface 22, and the light irradiated to the light entry area 211 by the light source 10 is perpendicular to the arc surface. Specifically, by simulating the light path of the light source 10, the direction of the outgoing light path of the light source 10 is confirmed, and then the desired arc surface shape is obtained by profiling the outgoing light path of the light source 10, so that the light incident to each position of the light entry area 211 can be perpendicular to the arc surface of the light entry area 211. By making the light irradiated to the light entry area 211 by the light source 10 perpendicular to the arc surface, it is possible to avoid the light irradiated to the light entry area 211 from being reflected on the incident interface of the light entry area 211, so that the light irradiated to the light entry area 211 can all enter the light guide plate 20, so that when the specifications and quantity of the light sources 10 remain unchanged, the amount of light entering the light guide plate 20 is increased, and the light utilization rate of the light source 10 is improved, so that the light can be transmitted a longer distance in the light guide plate 20 to obtain a larger light exit aperture.

In some embodiments, the arc surface of the light entrance area 211 is a smooth arc surface. The shape of the arc surface of the light entrance area 211 obtained by profiling can be any type of smooth arc surface. For example, the arc surface can be a hemispherical surface, a spline surface, etc.

Please refer to Figures 5 and 6. Figure 5 is an enlarged schematic diagram of the light entrance area 211 of the light guide plate 20 of some other embodiments of the present application; Figure 6 is a partial cross-sectional schematic diagram of the light guide plate 20 along the II-II direction of the embodiment shown in Figure 5. The light entrance area 211 of the light guide plate 20 of the embodiment shown in Figure 5 is a Fresnel surface. Specifically, the light entrance area 211 includes a central area 223 and a plurality of sub-areas 222 arranged sequentially around the periphery of the central area 223. The plurality of sub-areas 222 are concentric rings, that is, the centers of each sub-area coincide. The central area 223 includes a sub-arc surface 223a and a side surface 223b. Each sub-area 222 includes a sub-arc surface 222a and a side surface 222b, and the side surface 222b of each sub-area 222 connects the sub-arc surfaces 222a of two adjacent sub-areas 222. The side surface 223b of the central area 223 connects the sub-arc surface 223a and the sub-arc surface 222a of the sub-area 222 adjacent to the central area 223. The curvature direction of the sub-arc surface 222a of each sub-area 222 is toward the side of the first surface 21 away from the second surface 22. The side surface 222b of each sub-area 222 is parallel to the central axis a of the light guide plate 20. The sub-arc surface 223a of the central area 223 and the sub-arc surfaces 222a of multiple sub-areas 222 form an arc surface of the light entrance area 211, so that any light incident to the light entrance area 211 can be incident perpendicular to the sub-arc surface 223a or the sub-arc surface 222a, so that the light incident to the light entrance area 211 can all enter the light guide plate 20, thereby improving the light utilization rate of the light source 10 and increasing the transmission distance of the light in the light guide plate 20. Furthermore, by setting the light entrance area 211 of the light guide plate 20 as a Fresnel surface, the concave degree of the light entrance area 211 can be reduced, thereby reducing the thickness of the light guide plate 20 and further reducing the thickness of the ring light 100, so as to facilitate the application of the ring light 100 in a speaker.

Please refer to FIG. 4 again. The light source 10 is arranged opposite to the light entrance area 211, that is, the orthographic projection of the light entrance area 211 on the reference plane covers the orthographic projection of the light source 10 on the reference plane. In addition, the light emitting surface of the light source 10 faces the light guide plate 20, so that as much light as possible emitted by the light source 10 can enter the light guide plate 20 from the light entrance area 211. In some embodiments of the present application, the light source 10 corresponds to the center position of the light entrance area 211, that is, the center of the light source 10 is located on the central axis a of the light entrance area 211, so that the light of the light source 10 can be uniformly incident on various positions of the light entrance area 211. Further, in some embodiments, the type of the light source 10 matches the shape of the light entrance area 211. In other words, the shape of the light spot irradiated by the light source 10 on the first surface 21 needs to be the same as the shape of the light entrance area 211, so that the light of each light source 10 can be more uniformly incident on various positions of the light entrance area 211. Since the light incident on each position of the light incident area 211 is uniform, the light emitted from each position of the light emitting area 221 is uniform, so that the ring light 100 has a better appearance effect. For example, when the light spot shape of the light source 10 irradiating the first surface 21 is circular, the shape of the light incident area 211 is circular; when the light spot shape of the light source 10 irradiating the first surface 21 is square, the shape of the light incident area 211 is square.

In some embodiments, the size of the light entrance area 211 matches the effective emission angle of the light source 10, so that the light within the effective emission angle of the light source 10 can be incident on the light entrance area 211 when irradiating the first surface 21, so that most of the light energy of the light source 10 can enter the light guide plate 20, ensuring a high light utilization rate of the light source 10 while minimizing the size of the light entrance area 211. Since the size of the light entrance area 211 is reduced, while the degree of curvature of each position of the light entrance area 211 remains unchanged, it is ensured that the light incident on each position of the light entrance area 211 can be perpendicular to the light entrance area 211, thereby reducing the concave degree of the light entrance area 211 and reducing the thickness of the light guide plate 20. Specifically, the size of the light entrance area 211 needs to be equal to or slightly larger than the effective light emitting area of the light source 10, that is, the size of the light entrance area 211 needs to be equal to or slightly larger than the size of the irradiation area of the light emitted within the effective emission angle of the light source 10 on the first surface 21, so that all the light emitted within the effective emission angle of the light source 10 can enter the light guide 20 through the light entrance area 211. Specifically, when the center of the light source 10 is located on the central axis a of the light entrance area 211, the distance between the center of the light source 10 and the periphery 211a of the light entrance area 211 is L ₁ , and when the effective emission angle of the light source 10 is α, the distance L ₂ from the edge of the light entrance area 211 to its central axis a is equal to or slightly larger than L ₁ tanα, so that all the light within the effective emission angle α of the light source 10 can be incident on the light entrance area 211, so as to enhance the light utilization rate of the light source 10. Among them, the distance from the light source 10 to the light entrance area 211 refers to the distance from the light source 10 to the plane where the edge of the light entrance area 211 is located. The radius of the light incident area 211 refers to the radius of the area enclosed by the edge of the light incident area 211. The distance _L1 between the edge of the light source 10 and the plane where the periphery of the light incident area 211 is located is determined according to the size of the actual assembly space of the ring light 100.

For example, FIG7 shows a radiation diagram of a light source 10 of the present application, which shows the relative radiation density of the light source 10 under different emission angles. The concentric circles with the center point O as the center in the figure represent the size of the relative radiation density. For example, 0.1 to 1.0 in the figure represent relative radiation densities of 10% to 100%. The radial lines perpendicular to the concentric circles in the figure represent different emission angles of the light source 10. Among them, 0° to 90° respectively represent that the angle between the emission angle and the central axis a is ±0° to ±90°. It can be seen from the figure that when the emission angle is within 70°, the relative radiation density of the light source 10 is more than 30%, that is, the effective emission angle of the light source 10 in the embodiment shown in FIG6 is within ±70° of the central axis a of the light source 10. When the distance from the center of the light source 10 to the plane where the edge of the light entrance area 211 is located is L ₁ , the distance from the edge of the light entrance area 211 to the central axis a is equal to or slightly greater than L ₁ tan70°, so that all the light emitted by the light source 10 within the effective emission angle can enter the light entrance area 211, thereby enhancing the utilization rate of the light source 10. In addition, the problem of excessive thickness of the light guide plate 20 caused by an excessively large light entrance area 211 can be avoided, thereby reducing the thickness of the ring light 100.

In the present application, the number of light sources 10 can be one or more. For example, when the required aperture is small or the brightness of the aperture can be low, a single light source 10 can be used; when the required aperture is large or the brightness of the aperture is required to be high, multiple light sources 10 can be used. In the embodiment shown in FIG2 , the ring light 100 has one light source 10, and the center of the light source 10 is located on the central axis a of the light entrance area 211, so that the light intensity of the light source 10 irradiated to each position of the light entrance area 211 is the same, so that when the light is finally emitted from the light exit area 221 after being transmitted by the light guide plate 20, the light at each position of the light exit area 221 is uniform, so as to achieve a good light exit effect. Please refer to FIG8 , which is a schematic diagram of the structure of the ring light 100 of another embodiment of the present application. In the embodiment shown in FIG8 , there are multiple light sources 10, and the multiple light sources 10 are concentrated at a position opposite to the light entrance area 211, and the multiple light sources 10 are taken as a whole, so that the arc shape of the light entrance area 211 can be obtained by simple profiling. Furthermore, the center of the plurality of light sources 10 is located on the central axis a of the light entrance area 211, so that the light irradiated to the light entrance area 211 by the plurality of light sources 10 can be fully transmitted to the light guide plate 20. Compared with the plurality of light sources 10 in the prior art, the utilization rate of each light source 10 of the present application is improved, so that the number of light sources 10 can be reduced while achieving the same lighting effect, thereby saving energy and reducing heat.

Please refer to FIG. 9 . In some embodiments of the present application, the surface of the light guide plate 20 is covered with a reflective layer 40, and the reflective layer 40 is hollowed out in the area corresponding to the light entrance area 211 and the light exit area 221. In other words, the surface of the light guide plate 20 except the light entrance area 211 and the light exit area 221 is covered with the reflective layer 40, so that the light in the light guide plate 20 can be fully reflected when it is transmitted to the surface of the light guide plate 20, and the light after total reflection can continue to be transmitted in the light guide plate 20, thereby preventing the light from leaking from other positions of the light guide plate 20 except the light exit area 221 or being absorbed by the light guide plate 20, further improving the light utilization rate, and allowing the light to be transmitted over a greater distance in the light guide plate 20. In some embodiments, the reflective layer 40 can be obtained by surface treating the areas of the light guide plate 20 except the light entrance area 211 and the light exit area 221. For example, by performing grinding and other processing on the surface of the light guide plate 20 except the light entrance area 211 and the light exit area 221, the surface of the light guide plate 20 after grinding can fully reflect the light transmitted from the light guide plate 20 to it, that is, the surface of the light guide plate 20 after surface treatment forms a reflective layer 40. Alternatively, in some embodiments, a metal coating with good reflective effect, such as a silver coating, an aluminum coating, etc., is plated on the outer surface of the light guide plate 20 by processes such as sputtering and evaporation. Alternatively, in some embodiments, a reflective film can be directly attached to the outer surface of the light guide plate 20 to form a reflective layer 40. Among them, the reflective film can be a metal film layer, a white glue layer, or other film layers. It can be understood that only examples of the reflective layer 40 of some embodiments of the present application are given here, and the type of the reflective layer 40 of the present application is not limited.

In some embodiments of the present application, a light shielding layer 50 is stacked on the side of the reflective layer 40 facing away from the light guide plate 20, so as to prevent light from leaking out from other positions outside the light exit area 211 of the light guide plate 20 through the light shielding layer 50, thereby ensuring that the ring light 100 has a better lighting effect. The light shielding layer 50 can be a light shielding material such as a black ink layer, which is formed on the side of the reflective layer 40 facing away from the light guide plate 20 through a coating process; or, the light shielding layer 50 can also be a black film, etc., which is formed on the side of the reflective layer 40 facing away from the light guide plate 20 by pasting.

In some embodiments, the reflective layer 40 and the light shielding layer 50 may be an integral structure, and the reflective layer 40 and the light shielding layer 50 may be formed on the surface of the light guide plate 20 through a single process, which can reduce the process and reduce the cost. For example, in one embodiment of the present application, the integral structure of the reflective layer 40 and the light shielding layer 50 is a black and white glue. One side of the black and white glue is white, and the other side is black. The white side is attached to the outer surface of the light guide plate 20 to reflect the light transmitted from the light guide plate 20 to the surface of the light guide plate 20. The black side of the black and white glue faces away from the light guide plate 20, which can prevent the light from leaking from the light guide plate 20 during the transmission in the conduit plate. In some embodiments, the black and white glue includes a white film layer and a black ink layer stacked on the white film layer. Among them, the side of the white film layer facing away from the ink layer is the white side of the black and white glue, and the side of the black film layer facing away from the white film layer is the black side of the black and white glue. In this embodiment, the white film layer is the reflective layer 40, and the black ink layer is the light shielding layer 50.

Referring to FIG. 10 , in some embodiments of the present application, the ring light 100 further includes a decorative plate 60, which is disposed in the area surrounded by the inner ring of the light emitting area 221. The decorative plate 60 is used to enhance the appearance of the ring light 100. Furthermore, by disposing the decorative plate 60 in the area surrounded by the light emitting area 221, the light shielding effect of the area surrounded by the ring-shaped light emitting area 221 can be enhanced, light leakage can be avoided, and a better light emitting effect can be presented.

In some embodiments, an annular protrusion 25 is provided on the light exit area 221 of the second surface 22, and the annular protrusion 25 protrudes from the second surface 22. The annular protrusion 25 is formed of the same material as the light guide plate 20 and is integrally formed with the light guide plate 20. The annular protrusion 25 includes a light exit surface 251 and an inner wall surface 252 and an outer wall surface 253 that are arranged opposite to each other. The light exit surface 251 is located between the inner wall surface 252 and the outer wall surface 253 and connects the inner wall surface 252 and the outer wall surface 253. The side away from the light exit area 221 is the light exit surface 251. The light transmitted in the light guide plate 20 passes through the light exit area 221 and enters the annular protrusion 25. After being transmitted in the annular protrusion 25, the light is finally emitted from the light exit surface 251 of the annular protrusion 25, thereby obtaining an annular aperture. In some embodiments, the surfaces of the annular protrusion 25 except the light-emitting surface 251 are covered with a reflective layer 40 and a light-shielding layer 50 to prevent the absorption and light leakage of the light transmitted in the annular protrusion 25 by other positions of the annular protrusion 25 except the light-emitting surface, so that as much light transmitted in the annular protrusion 25 as possible can be emitted from the light-emitting surface 251 of the annular protrusion 25, thereby having a better light-emitting effect.

In some embodiments, the decorative plate 60 is embedded in the area surrounded by the annular protrusion 25, so that the decorative plate 60 is more stably fixed on the light guide plate 20. The decorative plate 60 includes a bottom surface 61 that is in contact with the light guide plate 20, a top surface 62 opposite to the bottom surface 61, and a side surface 63 connected between the bottom surface 61 and the top surface 62. When the decorative plate 60 is embedded in the area surrounded by the annular protrusion 25, the side surface 63 of the decorative plate 60 is in contact with the inner wall surface 252 of the annular protrusion 25. In addition, the side of the decorative plate 60 that is away from the light guide plate 20 is coplanar with the light emitting surface 251 of the annular protrusion 25, so that the ring light 100 has a better appearance.

Please refer to FIG. 11, which is a cross-sectional schematic diagram of a ring light 100 according to some other embodiments of the present application. In some embodiments, the ring light 100 further includes a fixing portion 41, which is connected to the light guide plate 20 to fix the light guide plate 20 to other structures. The light guide plate 20 includes a peripheral surface 23 connected between the first surface 21 and the second surface 22. In the embodiment shown in FIG. 11, the fixing portion 41 is a protruding structure protruding from the peripheral surface 23. Please refer to FIG. 12 and FIG. 13, FIG. 12 is a top view of the ring light 100 according to some other embodiments of the present application; FIG. 13 is a cross-sectional schematic diagram of the ring light 100 according to the embodiment shown in FIG. 12 along the I-I direction. In the embodiment shown in FIG. 12, the ring light 100 further includes a plurality of connecting arms 42, the fixing portion 41 is located at the periphery of the light guide plate 20 and is spaced from the light guide plate 20, and the plurality of connecting arms 42 are connected between the light guide plate 20 and the fixing portion 41. In some embodiments, the connecting arm 42 is elastic, so that when the fixing portion 41 is fixed, the connecting arm 42 will be elastically deformed when the light guide plate 20 is subjected to a force in the axial direction of the light guide plate 20 (i.e., in a direction parallel to the central axis a), and when the force on the light guide plate 20 is removed, the light guide plate 20 can return to its original position. In some embodiments, a button 70 can be provided on the side of the light guide plate 20 facing the light source 10. In some embodiments, the button 70 is provided on the circuit board 30. A pressing portion 212 protruding from the first surface 21 is provided on the first surface 21 of the light guide plate 20, and the pressing portion 212 is arranged opposite to the button 70. When the light guide plate 20 is pressed axially, the light guide plate 20 moves toward the circuit board 30, and the pressing portion 212 contacts and presses the button 70. Among them, the button 70 can be any button switch, for example, it can be a power button, a volume adjustment button, etc.

In the present application, by setting the light entrance area 211 and making the light irradiated to the light entrance area 211 perpendicular to the arc surface of the light entrance area 211, it is avoided that the light incident into the light guide plate 20 through the light entrance area 211 is reflected on the light entrance surface of the light entrance area 211, and the light loss is avoided, thereby improving the light utilization rate of the light source 10, so that when the number of light sources 10 is small, the light energy can be relatively sufficient, and the light can be transmitted over a long distance in the light guide plate 20. In other words, it is possible to obtain a larger light exit aperture when the number of light sources 10 is small, and reduce the power consumption and heat generation of the ring light 100 while realizing that the ring light 100 has a large light exit aperture.

Please refer to FIG. 14, which is a partial cross-sectional schematic diagram of the speaker 200 along the I-I direction of the embodiment shown in FIG. 1. In this embodiment, the ring light 100 is fixed to the device housing 110 of the speaker 200 and the light exit area 221 of the light guide plate 20 just exposes the device housing 110 through the opening 111 on the device housing 110. Specifically, in this embodiment, the ring light 100 is the ring light 100 of the embodiment shown in FIG. 11. The fixing portion 41 of the light guide plate 20 is fixed to the inner surface of the device housing 110 so that the light guide plate 20 is fixedly connected to the device housing 110. In this embodiment, there are four buttons 70, and the four buttons 70 are all arranged on the circuit board 30. The four buttons 70 are respectively a volume increase button, a volume decrease button, a call button and a microphone button. Four pressing portions 212 are provided on the first surface 21 of the light guide plate 20, and the four pressing portions 213 correspond to the four buttons 70 one by one. When the volume needs to be increased or decreased, a call needs to be made, or the microphone needs to be used, the corresponding position of the light guide plate 20 and the button 70 can be pressed axially to achieve the desired function. It can be understood that the number and function of the buttons 70 in the present application are only used for illustration and are not limited here.

The above are some implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims (11)

1. The sound box is characterized by comprising a shell and an annular lamp, wherein an opening is formed in the shell, and the annular lamp is fixed in the shell;

the annular lamp comprises a light source and a light guide plate, and the light guide plate is of a plate-shaped structure;

The light guide plate comprises a first surface and a second surface opposite to the first surface, wherein a light incident area is arranged on the first surface, an annular light emergent area is arranged on the second surface, the orthographic projection of the light incident area on a reference plane is positioned in a surrounding area of the orthographic projection of the annular light emergent area on the reference plane, the orthographic projection of the light incident area on the reference plane is positioned in the orthographic projection of the inner ring of the light emergent area on the reference plane, and the distance from the periphery of the light incident area to the central axis of the light guide plate is smaller than the distance from the inner ring of the light emergent area to the central axis; wherein the reference plane is a plane perpendicular to the optical axis of the light guide plate; the light emitted by the light source enters the light guide plate through the light entering area and is emitted from the light emitting area after being transmitted for a certain distance in the radial direction of the light guide plate; the radial direction of the light guide plate is perpendicular to the optical axis of the light guide plate, and the light guide plate is dispersed with a light diffusion agent;

the light entering area comprises an inward concave cambered surface, and the light rays irradiated to the light entering area by the light source are perpendicular to the cambered surface.

2. The sound box according to claim 1, wherein the light incident region comprises a central region and a plurality of sub-regions sequentially arranged around the periphery of the central region, the plurality of sub-regions are concentric annular, the central region and the sub-regions each comprise a sub-arc surface and a side surface, the side surface of the central region is connected with the sub-arc surface of the central region and the sub-arc surfaces of the sub-regions adjacent to the central region, the side surface of the sub-region is connected with the sub-arc surfaces of two adjacent sub-regions, and the sub-arc surfaces of the central region and the sub-arc surfaces of the sub-regions form the arc surface of the light incident region.

3. The loudspeaker in accordance with claim 1 wherein the arcuate surface of the light entry region is a smooth arcuate surface.

4. The loudspeaker of claim 1, wherein the light source is located on a side of the first surface of the light guide plate facing away from the second surface and spaced apart from the light guide plate.

5. The sound box according to claim 4, wherein the diameter of the annular light-emitting area is 20 to 50 times the distance from the light source to the light guide plate.

6. The sound box according to claim 4, wherein the light source is disposed opposite to the light incident area, the center of the light source is located on the central axis of the light incident area, and the light source includes a light emitting surface, and the light emitting surface faces the light guide plate.

7. The sound box of claim 1, wherein the surface of the light guide plate is covered with a reflective layer, and the reflective layer is hollow in the light entrance area and the light exit area.

8. The loudspeaker of claim 7, wherein a side of the reflective layer facing away from the light guide plate is covered with a light shielding layer.

9. The sound box according to claim 8, wherein the surface of the light guide plate is covered with black-and-white glue, the black-and-white glue comprises a white film layer and a black ink layer, and the black ink layer is formed on the white film layer and forms an integral structure with the white film layer; the white film layer is the reflecting layer, and the black ink layer is the shading layer.

10. The sound box of claim 1, wherein the light guide plate is dispersed with a light diffusing agent.

11. The sound box according to claim 1, wherein the ring-shaped lamp further comprises a fixing portion located at an outer periphery of the light guide plate and spaced apart from the light guide plate, and a plurality of connection arms connected between the light guide plate and the fixing portion, the connection arms having elasticity.