A sound box

Abstract

The application discloses a sound box, which comprises a support, a first light source assembly and a second light source assembly; the support is provided with a containing cavity, and a voice coil is arranged in the containing cavity; the side of the voice coil close to the opening end of the containing cavity is provided with a first light-transmitting piece, and the periphery of the voice coil is provided with a second light-transmitting piece; the outer periphery of the second light-transmitting piece is connected to the opening end; the first light source assembly is arranged on the inner side of the voice coil and is spaced from the voice coil, and is arranged opposite to the first light-transmitting piece; the second light source assembly is arranged on the periphery of the voice coil and is spaced from the voice coil, and is arranged opposite to the second light-transmitting piece; the second light source assembly comprises an inner ring light source group and an outer ring light source group which are arranged in sequence along the radial direction of the sound box; the light-emitting side of the first light source assembly is opposite to the first light-transmitting piece; and the light-emitting sides of the inner ring light source group and the outer ring light source group are opposite to the second light-transmitting piece, so that the first light-transmitting piece and the second light-transmitting piece form a light-emitting area with continuous brightness.

Description

Technical Field

[0001] This application relates to the field of optical technology, specifically to a speaker. Background Technology

[0002] Traditional speaker design typically focuses on acoustic performance, optimizing parameters such as frequency response, sensitivity, distortion, and maximum amplitude. External components like the diaphragm, dust cap, and rubber rings primarily serve sound generation and support functions, lacking active lighting and visual interaction capabilities. However, as smart home and entertainment audio-visual products evolve towards scenario-based and integrated audiovisual experiences, integrating uniform ambient lighting into the speaker body and synchronizing it with music has become a new application trend.

[0003] However, the speaker contains high-speed vibrating components such as the voice coil, spider, and diaphragm. The light-emitting structure must avoid their vibration stroke, resulting in very limited space for the lamp panel. Traditional single-lamp panel solutions are prone to interference with vibrating components, affecting structural safety and stability. At the same time, the mixing distance between the center of the dust cap, the inner and outer rings of the diaphragm, and the light source varies greatly. If the physical distance (mixing distance) between the center of the dust cap, the inner and outer rings of the diaphragm, and the bottom light source presents a large gradient distribution, traditional equal-density lighting will produce severe overexposure at very short distances and severe light decay at very long distances, resulting in brightness discontinuity on the appearance surface.

[0004] Therefore, the technology still needs to be improved and enhanced. Summary of the Invention

[0005] This application provides a speaker by setting a first light source assembly and a second light source assembly inside and outside the voice coil, respectively, and setting the second light source assembly as an inner ring light source group and an outer ring light source group arranged radially in sequence, so that the first light-transmitting element and the second light-transmitting element can form a light-emitting area with continuous brightness, thereby alleviating the current problems of limited light source layout and brightness discontinuity.

[0006] This application provides a speaker, the speaker comprising: The support has a receiving cavity, a voice coil is provided inside the receiving cavity, a first light-transmitting element is provided on the side of the voice coil near the opening end of the receiving cavity, and a second light-transmitting element is provided around the voice coil; the outer periphery of the second light-transmitting element is connected to the opening end. The first light source assembly is disposed inside the voice coil and spaced apart from the voice coil, and is disposed opposite to the first light-transmitting element; The second light source assembly is disposed around the voice coil and spaced apart from the voice coil, and is disposed opposite to the second light-transmitting element; The second light source assembly includes an inner ring light source group and an outer ring light source group arranged in sequence along the radial direction of the speaker. The light-emitting side of the first light source assembly is opposite to the first light-transmitting element, and the light-emitting sides of the inner ring light source group and the outer ring light source group are opposite to the second light-transmitting element, so that the first light-transmitting element and the second light-transmitting element form a light-emitting area with continuous brightness. Attached Figure Description

[0007] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0008] Figure 1 This is a three-dimensional structural diagram of the speaker provided in an embodiment of this application.

[0009] Figure 2 This is a schematic diagram of the exploded structure of a speaker provided in an embodiment of this application.

[0010] Figure 3 This is a top view of the speaker provided in an embodiment of this application.

[0011] Figure 4 Provided for the embodiments of this application Figure 3 A three-dimensional schematic diagram of point AA in the middle.

[0012] Figure 5 A top view of the first light source assembly and the second light source assembly in the speaker provided in the embodiments of this application.

[0013] Figure 6 This is a schematic diagram showing the layout of the first light source, the second light source, and the third light source in a speaker provided in an embodiment of this application.

[0014] Figure 7 Provided for the embodiments of this application Figure 3 A schematic diagram of the cross-section at point AA.

[0015] Figure 8 This is a partial schematic diagram of the lens assembly in a speaker provided in an embodiment of this application.

[0016] Figure 9 This is a schematic diagram of the optical path of the second light source component in the speaker provided in an embodiment of this application.

[0017] Figure label: 11. Bracket; 12. Voice coil; 13. First light-transmitting element; 14. Second light-transmitting element; 15. Rubber ring; 16. Third light-transmitting element; 21. First light source assembly; 211. First substrate; 212. First light source; 221. Second substrate; 222. Second light source; 223. Third light source; 22. Second light source assembly; 23. Lens assembly; 231. Lens unit; 101. Receiving cavity. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Features thus defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0020] Traditional speaker speakers generally focus on optimizing acoustic performance in terms of structure and appearance design. Their research and development is mainly limited to improving acoustic indicators such as frequency response, sensitivity, distortion, and maximum amplitude. The appearance of the speaker body (such as the diaphragm, dust cap, and rubber ring) is usually relatively simple and lacks active light emission or visual interaction capabilities. As smart home and entertainment audio-visual products develop towards scenario-based, audio-visual integration, and emotional interactive experiences, introducing large-area, highly uniform ambient lighting directly into the speaker body's vibration area, allowing it to generate visual feedback synchronously with the rhythm of music, has become an important trend in the integration of acoustics and industrial design.

[0021] However, applying traditional optical lighting design directly to the complex acoustic structure of a speaker, which combines dynamic vibration, multiple layers of light-blocking media, and asymmetric cavities, presents numerous challenges. First, the speaker integrates high-speed vibrating components such as voice coils, spiders, and diaphragms. The optical structure must strictly avoid their physical vibration strokes, resulting in the lamp panel and lens being placed in the extremely narrow remaining cavity at the bottom. Furthermore, due to the large gradient distribution of physical distances (i.e., light mixing distances) between the center of the dust cap, the inner and outer rings of the diaphragm, and the bottom light source, severe overexposure occurs at extremely short distances, while severe light decay occurs at extremely long distances, resulting in extreme brightness discontinuities on the surface.

[0022] Secondly, LEDs are discrete point light sources. When the light beams they emit pass through high light-blocking speaker components, if the annular arrangement intervals and local light mixing distances do not achieve a tight geometric match, the light spots cannot effectively overlap in the circumferential and radial directions. This easily produces obvious point-source graininess, jagged local spots, or annular dark area boundaries on the surface of the diaphragm and rubber ring, severely disrupting visual continuity.

[0023] Furthermore, the core components of the speaker, such as the spider, diaphragm, and dust cap, are not transparent optical media, but acoustic materials with low light transmittance and strong body scattering characteristics. Moreover, the light transmittance of each layer of the material varies significantly by several times or even tens of times (for example, the light transmittance of the spider is usually around 50%, while the light transmittance of the diaphragm and dust cap is only around 5%). When light passes through this multi-layered, low-light-transmittance, discontinuous medium, it will cause severe energy attenuation. Traditional solutions lack a quantitative mathematical relationship between "material light blocking - spatial distance - lens gain", and rely entirely on engineers to repeatedly prototype, test, modify boards, and adjust current based on experience, resulting in a long development cycle and extremely high trial and error costs.

[0024] It should be noted that the speaker in this application can be an acoustic sound-producing unit composed of components such as a bracket, voice coil, spider, diaphragm, and dust cap, while the speaker enclosure can be a complete device including the speaker and a light source assembly mounted thereon. That is, the speaker enclosure in this application includes a light-emitting speaker unit, which is the core component for achieving the integrated sound and light function of the speaker enclosure. The speaker enclosure in this application can be used independently or as part of an audio system.

[0025] The embodiments of this application provide a speaker that provides a first light source assembly 21 inside the voice coil 12 and a second light source assembly 22 outside the voice coil 12. The second light source assembly 22 is constructed as an inner ring light source group and an outer ring light source group arranged radially in sequence, so that the light-emitting areas of the first light-transmitting element 13 and the second light-transmitting element 14 form an integral light-emitting surface with continuous brightness. This enables effective avoidance of vibrating components in a limited space and alleviates the brightness discontinuity problem caused by the difference in light mixing distance.

[0026] The implementation of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Please see Figure 1 and Figure 2 The speaker provided in this application embodiment includes a bracket 11, a first light source assembly 21, and a second light source assembly 22.

[0028] The support frame 11 is the main supporting structure of the speaker, and the support frame 11 has a receiving cavity 101. The receiving cavity 101 can be an upward-opening cavity structure formed inside the support frame 11. This cavity is used to house the sound-producing components of the speaker, including but not limited to the voice coil 12, spider, diaphragm, and magnetic circuit system. The receiving cavity 101 has an open end, which faces the light-emitting surface and the sound-emitting surface of the speaker.

[0029] The voice coil 12 is disposed within the receiving cavity 101. The voice coil 12 is one of the core driving components of the speaker enclosure. During operation, the voice coil 12 reciprocates axially under the influence of a magnetic field, driving the diaphragm to vibrate and produce sound. In this embodiment, a first light-transmitting element 13 is provided on the side of the voice coil 12 near the opening end of the receiving cavity 101. The first light-transmitting element 13 can be a dust cap or other light-transmitting cover structure, and its installation position corresponds to the area above the central axis of the voice coil 12. The dust cap is typically dome-shaped or frustum-shaped, disposed above the voice coil 12, to prevent dust from entering the gap between the voice coil 12 and the magnetic circuit, while also participating in the radiation of high-frequency sound waves.

[0030] A second light-transmitting element 14 is provided around the voice coil 12. The second light-transmitting element 14 can be the diaphragm itself, or a light-transmitting layer covering the diaphragm or integrated into its structure. The diaphragm is the core sound-producing component of the loudspeaker, typically conical or bowl-shaped, with its inner periphery connected to the voice coil 12 and its outer periphery connected to the open end of the support 11. Driven by the voice coil 12, the diaphragm vibrates axially, pushing air to generate sound waves. Specifically, the outer periphery of the second light-transmitting element 14 can be connected to the open end of the support 11 via a rubber ring 15. The rubber ring 15 has good flexibility, allowing the second light-transmitting element 14 to freely expand and contract during vibration, while also serving a sealing and supporting function.

[0031] In this embodiment, both the first light-transmitting component 13 and the second light-transmitting component 14 are made of materials with a certain light transmittance. For example, engineering plastics, silicone, or composite materials with added light-transmitting agents can be selected, allowing light from below to pass through these components and form a luminous effect on the upper surface of the speaker. It should be noted that the light transmittance of the first light-transmitting component 13 and the second light-transmitting component 14 can be selected and adjusted according to actual needs during the design stage.

[0032] The first light source assembly 21 is disposed inside the voice coil 12, spaced apart from the voice coil 12, and opposite to the first light-transmitting element 13. Specifically, the first light source assembly 21 can be disposed in the cavity inside the voice coil 12, directly below the first light-transmitting element 13. The light-emitting side of the first light source assembly 21 faces upward, opposite to the first light-transmitting element 13, so that the light emitted by the first light source 212 can be projected upward onto the first light-transmitting element 13, and after passing through the first light-transmitting element 13, form a light-emitting effect in the central area of ​​the upper surface of the speaker.

[0033] The second light source assembly 22 is disposed around the voice coil 12, spaced apart from the voice coil 12, and is disposed opposite to the second light-transmitting element 14. The light-emitting side of the second light source assembly 22 faces upward and is opposite to the second light-transmitting element 14, so that the light emitted by the second light source 222 can be projected upward onto the second light-transmitting element 14, and after passing through the second light-transmitting element 14, it forms a light-emitting effect in the outer area of ​​the upper surface of the speaker.

[0034] The second light source assembly 22 includes an inner ring light source group and an outer ring light source group arranged radially along the speaker enclosure. The inner ring light source group is located radially inside the second light source assembly 22, close to the voice coil 12; the outer ring light source group is located radially outside the second light source assembly 22, close to the side wall of the support 11. The light-emitting side of the first light source assembly 21 is opposite to the first light-transmitting element 13, and the light-emitting sides of the inner and outer ring light source groups are opposite to the second light-transmitting element 14. Through this dual-light panel partitioning arrangement, the central area where the first light-transmitting element 13 is located is illuminated by the first light source assembly 21, and the peripheral area where the second light-transmitting element 14 is located is illuminated by the inner and outer ring light source groups of the second light source assembly 22. The double-ring structure of the inner and outer ring light source groups ensures that different radial positions of the second light-transmitting element 14 can be illuminated, thereby forming a continuous light-emitting area between the first light-transmitting element 13 and the second light-transmitting element 14, i.e., from the center to the edge of the upper surface of the speaker enclosure, the light has no obvious discontinuity.

[0035] In this embodiment, the first light source assembly 21 adopts a centrally recessed arrangement. The first light source assembly 21 is horizontally positioned at an acoustically safe height directly below the first light-transmitting element 13. This position is lower than the top of the voice coil 12, leaving sufficient clearance to ensure that the voice coil 12 does not physically contact the first light source assembly 21 during its maximum vibration stroke. The second light source assembly 22 adopts a peripheral annular shock-absorbing arrangement, positioned in the avoidance area below the second light-transmitting element 14, located around the voice coil 12, and leaving sufficient clearance to ensure that the voice coil 12 does not interfere with the second light source assembly 22 during vibration. Through this centrally recessed and peripheral annular shock-absorbing spatial arrangement, the light-emitting structure perfectly avoids the vibration area of ​​the voice coil 12, alleviating the problem of insufficient internal space and light path being easily blocked by vibrating components, leading to light emission interruptions.

[0036] In some embodiments, the first light source assembly 21 includes a first substrate 211 and a plurality of first light sources 212 disposed on the first substrate 211. The first substrate 211 may be a printed circuit board (PCB) or a flexible circuit board (FPC), and the first light sources 212 may be LED beads, such as surface-mount LEDs (SMD LEDs) or through-hole LEDs, whose emission color may be white, warm white, or colored, or may be RGB multi-color LEDs. The plurality of first light sources 212 are arranged at intervals around the central axis of the first substrate 211 to form a ring array. The center-to-center distance between adjacent first light sources 212 is not greater than a first preset distance threshold, which is related to a first light mixing distance between the first light source 212 and the first light-transmitting element 13.

[0037] The mixing distance can be considered as the physical distance between the light-emitting surface of a light source and the inner surface of the light-transmitting component it illuminates. This distance determines the degree of light spot diffusion during the propagation of light from the light source to the light-transmitting component. When the mixing distance is large, the light spot formed by a single light source is larger, and adjacent light spots are more likely to overlap, thus allowing for a suitable increase in the distance between light sources. When the mixing distance is small, the light spot formed by a single light source is smaller, requiring a denser arrangement of light sources to ensure overlapping and coverage of light spots.

[0038] Please see Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 Specifically, let the emission half-angle of the first light source 212 be θ1 (i.e., the nominal emission half-angle of the LED, for example, θ1=60°, corresponding to a nominal emission angle of 120°), and the first light mixing distance from the first light source 212 to the first light-transmitting element 13 be h1. Then the theoretical projected light spot radius of a single first light source 212 on the surface of the first light-transmitting element 13 is R_spot1 = h1·tanθ1, and the light spot diameter is D_spot1 = 2h1·tanθ1.

[0039] Taking the setting of two first light sources 212 as an example, the two first light sources 212 can be arranged symmetrically with respect to the central axis of the first substrate 211. Let the center distance between two adjacent first light sources 212 arranged symmetrically be S1. In order to ensure that the centers of two adjacent light spots are at least tangent or intersecting and overlapping (i.e., no dark area in the center is generated), the physical constraint condition is S1≤ D_spot1, that is, S1≤ 2h1·tanθ1. When this constraint condition is satisfied, the projected light spots of adjacent first light sources 212 on the surface of the first light-transmitting element 13 can overlap with each other, eliminating the bright spots or dark areas in the center caused by the discrete distribution of multiple light sources.

[0040] Given h1 = 23.4 mm, θ1 = 60°, and the spacing S1 = 18.5 mm, then D_spot1 = 2 × 23.4 × tan(60°) = 46.8 × 1.732 ≈ 81.1 mm. Since 18.5 mm << 81.1 mm, adjacent light spots have a large overlap area, ensuring sufficient illumination of the surface of the first light-transmitting element 13, thus mitigating the problem of dark areas or bright spots in the center.

[0041] In this embodiment, by limiting the center distance between adjacent first light sources 212 to no greater than the first preset distance threshold calculated based on the light mixing distance, it is beneficial to the illumination uniformity of the first light-transmitting element 13, thereby alleviating the bright spots or central dark areas caused by the discrete distribution of multiple light sources, and making the central light-emitting area visually continuous and smooth.

[0042] In some embodiments, the second light source assembly 22 includes a second substrate 221, on which an inner ring light source group and an outer ring light source group are disposed. The second substrate 221 can be a printed circuit board (PCB) or a flexible printed circuit board (FPC). The inner ring light source group includes a plurality of second light sources 222, which are arranged in a ring with intervals. The outer ring light source group includes a plurality of third light sources 223, which are arranged in a ring. The second light sources 222 and the third light sources 223 can be LED chips, such as surface-mount LEDs (SMD LEDs) or through-hole LEDs, and their emission color can be white, warm white, or colored, or they can be RGB multi-color LEDs.

[0043] The center-to-center distance between two adjacent second light sources 222 is no greater than a second preset distance threshold, which is related to a second light mixing distance between the second light source 222 and the second light-transmitting element 14. The center-to-center distance between two adjacent third light sources 223 is no greater than a third preset distance threshold, which is related to a third light mixing distance between the third light source 223 and the second light-transmitting element 14.

[0044] Specifically, based on the above radial partitioning scheme, the circumferential arrangement of the inner and outer ring light sources in the second light source component 22 must meet the visual uniformity constraint in order to eliminate the circumferential graininess caused by discrete point sources.

[0045] Let p2 be the center-to-center distance between two adjacent second light sources 222 in the inner ring light source group, and h2 be the second mixing distance; let p3 be the center-to-center distance between two adjacent third light sources 223 in the outer ring light source group, and h3 be the third mixing distance. To avoid the generation of identifiable dark or bright areas in the circumferential direction by adjacent light spots, the arrangement pitch of adjacent light sources in each ring should not exceed the maximum allowable pitch p_max, that is, satisfy the following constraint relationship: p2 ≤ p_max = min(p_ν, k·h1), p3 ≤ p_max = min(p_ν, k·h2).

[0046] Where pν is the visual particle control threshold, used to prevent the human eye from identifying discrete light spots at close range, and is set to 18 mm in this embodiment; k is the mixing distance correction coefficient, used to characterize the influence of the mixing distance on the degree of light spot expansion, and is set to 0.40 in this embodiment.

[0047] Based on this, the number of light sources required for each loop can be further calculated. For a loop with diameter D, the theoretical number of light sources is: N = 2·[πD / (2p_max)]. Wherein, [ ] represents the floor operation, multiplying by 2 and taking the even number result to ensure that the light sources are symmetrically distributed about the central axis, which is convenient for circuit wiring and optical uniformity control.

[0048] In this embodiment, by constraining the circumferential arrangement interval, the projected light spots of each adjacent light source on the target light-emitting surface can achieve smooth overlap in the circumferential direction, which is beneficial to the smooth overlap of tangential energy. This effectively alleviates the problem of graininess and ring-shaped texture caused by improper arrangement of discrete light sources in traditional solutions, and is beneficial to the visual continuity and brightness uniformity of the second light-transmitting element 14 in the circumferential dimension.

[0049] In some embodiments, the radius of the inner ring light source group is the first ring radius, and the radius of the outer ring light source group is the second ring radius, with the first ring radius being smaller than the second ring radius; wherein, the sum of the first ring radius and the second projection spot radius of the second light source 222 on the second light-transmitting element 14 is greater than the difference between the second ring radius and the third projection spot radius of the third light source 223 on the second light-transmitting element 14; the second projection spot radius is related to the second mixing distance, and the third projection spot radius is related to the third mixing distance.

[0050] Specifically, the radius of the circle is the radius of the first ring R2, and the radius of the circle is the radius of the second ring R3. The radius of the first ring R2 is smaller than the radius of the second ring R3. If the radius of the inner ring light source group is R2 = 36 mm, the second mixing distance is h2 = 41.8 mm; the radius of the outer ring light source group is R3 = 55 mm, the third mixing distance is h3 = 53.4 mm, and the emission half-angle of the second light source 222 and the third light source 223 is 30°.

[0051] Therefore, the single-spot radius of the second light source 222 is r_spot2 = h2·tan(30°) = 41.8×0.5774≈ 24.1mm, and the radial coverage area is [R2- r_spot2, R2+ r_spot2] = [36-24.1, 36+24.1]=[11.9mm, 60.1mm]. The single-spot radius of the third light source 223 is r_spot3 = h3·tan(30°) = 53.4×0.5774 ≈ 30.8mm, and the radial coverage area is [R3- r_spot3, R3+ r_spot3] = [55-30.8, 55+30.8]= [24.2mm, 85.8mm].

[0052] The intersection of the two intervals is [24.2 mm, 60.1 mm], and the overlap width W_overlap = 60.1 - 24.2 = 35.9 mm. The results show that the inner and outer rings have a very wide fusion region in the radial direction, which can avoid the annular dark band.

[0053] In this embodiment, by defining the center distance between adjacent light sources in the inner ring light source group and the outer ring light source group respectively, and performing overlap verification of the inner and outer ring projected light spots in the radial direction, it is ensured that the second light-transmitting element 14 obtains uniform illumination in both the circumferential and radial directions, which helps to reduce point source graininess and annular dark areas.

[0054] This application establishes a circumferential arrangement spacing constraint and radial overlap verification model based on adaptive light mixing distance. In the circumferential direction, the arrangement spacing of adjacent light sources is strictly constrained to be no greater than the maximum allowable spacing. The number of light sources that need to be symmetrically arranged in each loop is calculated to ensure smooth overlap of adjacent light spots in the circumferential direction. In the radial direction, the coverage radius of a single light source generated by the half-angle of the light emitted after lens convergence is used to strictly verify the overlap of the physical projection intervals of the inner and outer ring light source groups on the surface of the second light-transmitting element 14, ensuring that the radial coverage intervals of the inner and outer rings intersect. Through dual light spot overlap control in both the circumferential and radial directions, common problems on the luminous surface, such as point source graininess, jagged local spots, and annular dark area boundaries, are alleviated, resulting in a uniform, continuous, and flawless visual luminous effect on the surface of the drum paper and the rubber ring 15.

[0055] Since the first light source 212, the second light source 222, and the third light source 223 are located at different radial positions, their mixing distances d1, d2, and d3 to their corresponding light-transmitting components are typically different. Specifically, the first light-transmitting component 13 (dust cap) is closer to the bottom first light source assembly 21, while the inner ring of the second light-transmitting component 14 (drum paper) is farther from the inner ring light source group, and the outer ring of the second light-transmitting component 14 is even farther from the outer ring light source group. This large-span gradient distribution of mixing distances leads to different degrees of light energy attenuation in different areas. If a uniform driving power is used, bright areas will appear at closer distances, while dark areas will appear at farther distances, resulting in uneven brightness in the appearance.

[0056] Therefore, in some embodiments, the driving power of the first light source 212 is related to the first mixing distance between the first light source 212 and the first light-transmitting element 13, the driving power of the second light source 222 is related to the second mixing distance between the second light source 222 and the second light-transmitting element 14, and the driving power of the third light source 223 is related to the third mixing distance between the third light source 223 and the second light-transmitting element 14. That is, the driving power is set according to the mixing distance of each light source to the corresponding light-transmitting element to compensate for the attenuation difference caused by the difference in optical path.

[0057] Specifically, the first target illuminance of the first light-transmitting element 13 illuminated by the first light source 212, the second target illuminance of the second light-transmitting element 14 illuminated by the second light source 222, and the third target illuminance of the second light-transmitting element 14 illuminated by the third light source 223 are the same. In other words, the design goal is to make the surface brightness of the area of ​​the first light-transmitting element 13 and the areas of the second light-transmitting element 14 consistent, thereby improving the visual uniformity and seamless transition of brightness of the entire light-emitting area.

[0058] To achieve the above objectives, this application establishes a mathematical model for calculating the power ratio of different zones based on illuminance conservation. According to the inverse square law of illuminance in non-imaging optics, the axial illuminance E produced by a single LED on the target emitting surface satisfies: E = K·(P·τ·G) / h² Where K is a constant (including LED electro-optical conversion efficiency and unit conversion factor), P is the electrical power of a single LED, τ is the equivalent transmittance of the optical path, G is the lens gain, and h is the mixing distance.

[0059] To achieve a visual effect of consistent brightness across a large area, the target illuminance in each light-emitting area must be equal, i.e., E1≈E2≈E3. From this, the analytical relationship between the driving power of a single LED in each area and its physical parameters can be derived: P ∝h² / (τ·G) In other words, the driving power of a single LED is positively correlated with the square of the light mixing distance and inversely correlated with the product of the equivalent transmittance of the optical path and the lens gain. The physical meaning of this relationship is: the greater the light mixing distance, the greater the attenuation of light during propagation, requiring higher power to compensate; the lower the transmittance, the greater the energy loss of light as it passes through the medium, also requiring higher power to compensate; and the greater the lens gain, the better the light-gathering effect, and the lower the required power can be.

[0060] Based on the above relationships, as one embodiment, the driving power P1 of the first light source 212 is positively correlated with the square of the first mixing distance h1 and negatively correlated with the optical path equivalent transmittance τ1 of the first light source 212; the driving power P2 of the second light source 222 is positively correlated with the square of the second mixing distance h2 and negatively correlated with the optical path equivalent transmittance τ2 of the second light source 222; the driving power P3 of the third light source 223 is positively correlated with the square of the third mixing distance h3 and negatively correlated with the optical path equivalent transmittance τ3 of the third light source 223.

[0061] Therefore, the recommended power ratio of the three groups of LEDs is as follows: P1:P2:P3= h1² / (τ1·G1) : h2² / (τ2·G2) : h3² / (τ3·G3).

[0062] Among them, the optical path equivalent transmittance τ1 of the first light source 212 corresponds to the transmittance C of the first light-transmitting component 13 (dust cap); the optical path equivalent transmittance τ2 of the second light source 222 and the optical path equivalent transmittance τ3 of the third light source 223 both correspond to the transmittance B of the second light-transmitting component 14 (drum paper).

[0063] The driving power P1 of the first light source 212, the driving power P2 of the second light source 222, and the driving power P3 of the third light source 223 satisfy the following: P1:P2:P3= h1² / (C·G1) : h2² / (B·G2) : h3² / (B·G3) Neglecting lens gain (taking G1=G2=G3=1), the input parameters are h1=23.4mm, h2=41.8mm, h3=53.4mm, and the material transmittance is C=0.04 (dust cap transmittance 4%) and B=0.06 (drum paper transmittance 6%).

[0064] P1: P2: P3= 23.4² / 0.04 : 41.8² / 0.06 : 53.4² / 0.06 Normalized to the power of the first light source component 21 (divided proportionally by 13689): P1: P2: P3≈ 1: 2.13: 3.47.

[0065] That is, without the lens and without considering the light blocking effect of the spool, the power of a single light source 222 needs to be about 2.13 times that of the first light source 212, and the power of a single light source 223 needs to be about 3.47 times that of the first light source 212, in order to compensate for the additional light attenuation caused by the increased light mixing distance and the low light transmittance of the drum paper.

[0066] Please see Figure 8 In order to further improve the light energy utilization efficiency and reduce the power consumption requirements of the peripheral light source, in some embodiments, the speaker also includes a lens assembly 23. The lens assembly 23 is disposed on the light-emitting side of the second light source assembly 22 and covers the inner ring light source group and the outer ring light source group. The lens assembly 23 is used to adjust the light emission half angle of the inner ring light source group and the outer ring light source group.

[0067] The light emission half-angle can be the half-angle width of the light beam emitted from the light source, that is, the angle between the central axis of the beam and the point where the light intensity drops to half of the central light intensity.

[0068] The original emission half-angle (i.e., the first emission half-angle) of the second light source 222 and the third light source 223 before adjustment by the lens assembly 23 may be large, for example, about 60° or more. A large emission half-angle means that the light diverges severely and spreads to a large area before reaching the second light-transmitting element 14. Although the light spot area is large, the illuminance per unit area is low, and it is easy to scatter light into non-target areas, resulting in wasted light energy.

[0069] The lens assembly 23 reduces the emission half-angle of the second light source 222 and the third light source 223 from the first emission half-angle to the second emission half-angle. For example, the emission half-angle is compressed from 60° to 30°. The light collimated by the lens assembly 23 is more focused, and the light spot diffuses more slowly during propagation. When it reaches the second light-transmitting element 14, it can cover the target area with an appropriate size, thereby achieving a balance between coverage area and illuminance.

[0070] Specifically, the lens assembly 23 can be a single integrated condensing lens, formed by the integral connection of multiple small lens units 231. Each small lens unit 231 corresponds to a light source on the second light source assembly 22 and is located on the light-emitting side of that light source. The single integrated condensing lens reduces the light emission half-angle of the second light source 222 and the third light source 223 from a first light emission half-angle to a second light emission half-angle, for example, from 60° to 30°.

[0071] The integrated condenser lens can be integrally molded from transparent optical materials (such as polymethyl methacrylate (PMMA), polycarbonate (PC), or optical glass) using injection molding or compression molding processes. The incident surface of each small lens unit 231 can be designed as a plane or a spherical surface, and the exit surface can be designed as a convex spherical or aspherical surface to achieve the converging effect of light. Multiple small lens units 231 are integrally connected by connecting ribs or a substrate to form a ring-shaped structure, facilitating installation and positioning.

[0072] After factoring in the gain of the integrated condenser lens, let G1=1 (the first light source assembly 21 is not equipped with a lens), G2=G3=3.73 (the ideal axial solid angle focusing gain of the second light source assembly 22 after the integrated condenser lens is configured; this gain value comes from the reduction ratio of the solid angle when the output half-angle is reduced from 60° to 30°, i.e., (1-cos60°) / (1-cos30°) ≈ 0.5 / 0.134 ≈3.73). Substituting the parameters from the previous example (h1=23.4mm, h2=41.8mm, h3=53.4mm, C=0.04, B=0.06), we can obtain: P1:P2:P3= 1 : 4.25 / 3.73 : 6.94 / 3.73 ≈ 1 : 0.57 : 0.93.

[0073] The calculations above show that, after configuring the integrated focusing lens, the focusing gain of the lens significantly compensates for the optical path attenuation and light blocking by the medium, allowing the required power of the second light source 222 and the third light source 223 to be lower than that of the first light source 212. Specifically, the power of the second light source 222 is approximately 57% of that of the first light source 212, and the power of the third light source 223 is approximately 93% of that of the first light source 212. Compared to the lensless scheme (1:2.13:3.47), the power reduction of the second light source 222 is approximately 73%, and the power reduction of the third light source 223 is approximately 73%.

[0074] It should be noted that the above calculations were obtained without taking into account the light-blocking effect of the third light-transmitting element 16 (spider). In some embodiments, the speaker enclosure further includes a third light-transmitting element 16, which is disposed between the second light-transmitting element 14 and the second light source assembly 22. The third light-transmitting element 16 can be a spider. The spider is one of the important components of a loudspeaker, and it is usually in the form of a wave-shaped ring structure, with its inner periphery connected to the voice coil 12 and its outer periphery connected to the bracket 11. The main function of the spider is to provide axial positioning and restoring force for the voice coil 12, ensuring that the voice coil 12 always remains within the linear operating region when vibrating, while preventing the voice coil 12 from lateral wobbling.

[0075] In this embodiment, the spring is made of a material with a certain light transmittance, allowing light from the second light source assembly 22 to pass through the spring and then through the drum paper, ultimately forming a light-emitting effect on the upper surface of the speaker. The light transmittance of the spring is usually higher than that of the drum paper (for example, the light transmittance of the spring is about 50%, while that of the drum paper is about 6%), because the spring is usually made of woven fabric or composite materials, and the gaps between the fibers allow some light to pass through.

[0076] Please see Figure 9 The light propagation process is as follows: Light emitted from the first light source component 21 passes directly through the dust cap (without spider shielding), creating a light-emitting effect in the central area of ​​the speaker's upper surface. Light emitted from the second light source component 22 (inner ring light source group and outer ring light source group) passes sequentially through the spider and diaphragm (with double-layer shielding from the spider and diaphragm), creating a light-emitting effect in the outer area of ​​the speaker's upper surface. Because the spider and diaphragm have different transmittances and different mixing distances in different areas, the power of the light sources in different areas needs to be precisely matched using the aforementioned power ratio model to ensure uniform brightness in the final light-emitting area.

[0077] In actual products, light needs to pass through both the spring and the diaphragm simultaneously. Therefore, the equivalent transmittance τ2 and τ3 of the second light source 222 and the third light source 223 should be the product of the spring transmittance A and the diaphragm transmittance B, A×B (approximately 0.50×0.06=0.03), rather than B=0.06 used in the aforementioned calculation. Substituting τ2=τ3=0.03 into the above formula and taking into account the lens gain G2=G3=3.73, we get: P1:P2:P3= 23.4² / (0.04×1) : 41.8² / (0.03×3.73) : 53.4² / (0.03×3.73) = 13689 : 15614.3 : 25483.5 Normalized to the power of the first light source component 21 (divided proportionally by 13689): P1:P2:P3≈ 1 : 1.14 : 1.86.

[0078] In practical applications that take into account the light-blocking effect of the elastic wave, the power of the second light source 222 needs to be about 1.14 times that of the first light source 212, and the power of the third light source 223 needs to be about 1.86 times that of the first light source 212.

[0079] Therefore, this application establishes a quantitative mathematical relationship between material transmittance, light mixing distance, and lens gain. Based on the inverse square law of illuminance in non-imaging optics, the formula for calculating the power ratio of different zones, P∝h² / (τ·G), is derived. Given the transmittance of each layer of material, the light mixing distance of each region, and the lens gain, the driving power resolution ratio of the first light source 212, the second light source 222, and the third light source 223 can be directly calculated. This eliminates the need for engineers to repeatedly prototype, test, modify boards, and adjust current based on experience, significantly shortening the development cycle and reducing trial-and-error costs. Simultaneously, the integrated focusing lens configured on the light-emitting side of the second light source assembly 22 reduces the light-emitting half-angle, lowering electrical power and greatly alleviating the heat dissipation and power consumption pressure within the compact cavity. Furthermore, the integrated structure of the lens facilitates installation and positioning, improving production efficiency and product consistency.

[0080] The speaker in this application achieves a dual-light panel physical partition layout with a central depression and peripheral ring vibration damping by placing the first light source assembly 21 inside the voice coil 12 and the second light source assembly 22 outside the voice coil 12, and arranging the second light source assembly 22 radially as an inner ring light source group and an outer ring light source group. The first light source assembly 21 is horizontally arranged at an acoustic safety height directly below the dust cap, and the second light source assembly 22 is arranged in the avoidance area below the drum paper. Through the decoupling of the two levels of physical space, the problem of brightness extreme value discontinuity caused by the large span gradient distribution of the mixing distance in the traditional single-light panel solution is alleviated under the premise of strictly avoiding the vibration stroke of high-speed vibrating components such as the voice coil 12, the spider, and the drum paper. Meanwhile, by establishing a mathematical model for calculating the power ratio of the zones based on illuminance conservation, the driving power is set according to the different mixing distances of each zone, so that the surface brightness of the dust cap area and the inner and outer ring areas of the drum paper can be consistent in terms of illuminance. This alleviates the brightness gap between the central ultra-short mixing zone and the outer long mixing zone, and achieves a smooth and continuous brightness transition from the center of the speaker to the edge.

[0081] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0082] The speaker provided in the embodiments of this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A speaker, characterized in that, The speaker includes: The bracket has a receiving cavity, a voice coil is provided in the receiving cavity, a first light-transmitting element is provided on the side of the voice coil near the opening end of the receiving cavity, and a second light-transmitting element is provided around the voice coil; the outer periphery of the second light-transmitting element is connected to the opening end; The first light source assembly is disposed inside the voice coil and spaced apart from the voice coil, and is disposed opposite to the first light-transmitting element; The second light source assembly is disposed around the voice coil and spaced apart from the voice coil, and is disposed opposite to the second light-transmitting element; The second light source assembly includes an inner ring light source group and an outer ring light source group arranged in sequence along the radial direction of the speaker. The light-emitting side of the first light source assembly is opposite to the first light-transmitting element, and the light-emitting sides of the inner ring light source group and the outer ring light source group are opposite to the second light-transmitting element, so that the first light-transmitting element and the second light-transmitting element form a light-emitting area with continuous brightness.

2. The speaker according to claim 1, characterized in that, The first light source assembly includes a first substrate and a plurality of first light sources disposed on the first substrate. The plurality of first light sources are arranged at intervals around the central axis of the first substrate, and the center distance between adjacent first light sources is not greater than a first preset distance threshold. The first preset distance threshold is related to a first light mixing distance between the first light source and the first light-transmitting element.

3. The speaker according to claim 1, characterized in that, The inner ring light source group includes a plurality of second light sources, which are arranged in a ring-shaped interval; the center distance between two adjacent second light sources is not greater than a second preset distance threshold, which is related to a second light mixing distance between the second light source and the second light-transmitting element. The outer ring light source group includes multiple third light sources, which are arranged in a ring shape; the center distance between two adjacent third light sources is not greater than a third preset distance threshold, which is related to the third light mixing distance between the third light source and the second light-transmitting element.

4. The speaker according to claim 3, characterized in that, The radius of the inner ring light source group is the first ring radius, and the radius of the outer ring light source group is the second ring radius. The first ring radius is smaller than the second ring radius. Wherein, the sum of the first ring radius and the second projection spot radius of the second light source on the second light-transmitting element is greater than the difference between the second ring radius and the third projection spot radius of the third light source on the second light-transmitting element; the second projection spot radius is related to the second light mixing distance, and the third projection spot radius is related to the third light mixing distance.

5. The speaker according to claim 3, characterized in that, The driving power of the first light source is related to the first light mixing distance between the first light source and the first light-transmitting element, the driving power of the second light source is related to the second light mixing distance between the second light source and the second light-transmitting element, and the driving power of the third light source is related to the third light mixing distance between the third light source and the second light-transmitting element.

6. The speaker according to claim 5, characterized in that, The first target illuminance of the first light source illuminating the first light-transmitting element, the second target illuminance of the second light source illuminating the second light-transmitting element, and the third target illuminance of the third light source illuminating the second light-transmitting element are the same.

7. The speaker according to claim 6, characterized in that, The driving power of the first light source is positively correlated with the square of the first light mixing distance and negatively correlated with the equivalent light transmittance of the optical path of the first light source. The driving power of the second light source is positively correlated with the square of the second mixing distance and negatively correlated with the equivalent transmittance of the optical path of the second light source. The driving power of the third light source is positively correlated with the square of the third mixing distance and negatively correlated with the equivalent transmittance of the optical path of the third light source.

8. The speaker according to any one of claims 1 to 7, characterized in that, The speaker also includes a lens assembly, which is disposed on the light-emitting side of the second light source assembly and covers the inner ring light source group and the outer ring light source group; the lens assembly is used to adjust the light emission half-angle of the inner ring light source group and the outer ring light source group.

9. The speaker according to claim 8, characterized in that, The lens assembly is used to reduce the emission half-angle of the second light source and the third light source from the first emission half-angle to the second emission half-angle.

10. The speaker according to claim 8, characterized in that, The speaker also includes a third light-transmitting element, which is disposed between the second light-transmitting element and the second light source assembly.

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