Sound equipment and design method thereof
By designing an edge light-incident area on the light-incident surface of the speaker light guide, stray light from the light source is refracted to the light-out surface, solving the problem of insufficient brightness on the light-out surface of speaker products and achieving a balance between brightness improvement and cost control.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- XIAN TCL SOFTWARE DEV
- Filing Date
- 2026-01-30
- Publication Date
- 2026-04-21
AI Technical Summary
In existing audio products, the overall brightness of the light-emitting surface of the light-emitting structure does not meet the requirements, and traditional solutions increase the number or specifications of light sources, leading to increased production costs.
The light guide is designed with an edge light-incident area on the light-incident surface. The stray light from the light source is refracted to the light-emitting surface through the edge light-incident area. Combined with the structural optimization of the polarizing part and the mounting part, the brightness of the light-emitting surface is improved while controlling the cost.
Through pure optical design, the overall brightness of the light-emitting surface of audio products has been improved, production costs have been reduced, and a balance has been achieved between brightness enhancement and cost control.
Smart Images
Figure CN121908184A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of light guide structure technology, and in particular to an audio device and its design method. Background Technology
[0002] Currently, consumers' demands for electronic devices are no longer limited to basic functions, but are paying more attention to the appearance design, interactive experience, and user-friendly details. For example, audio products often include light-emitting structures, which work in conjunction with the sound-emitting structures to provide users with a dual visual and auditory experience. However, in some audio products, the overall brightness of the light-emitting surface of the light-emitting structure does not meet the requirements. Summary of the Invention
[0003] The main objective of this invention is to propose a speaker and its design method, which aims to improve the problem that the overall brightness of the light-emitting surface of the light-emitting structure in some current speaker products does not meet the requirements.
[0004] To achieve the above objectives, the sound system proposed in this invention includes:
[0005] A housing, wherein a sound-generating structure is provided inside the housing; A light guide has a light-incident surface and a light-exit surface in a first direction. A mounting portion is provided at one end of the light guide in a second direction. The mounting portion extends away from the light-exit surface in the first direction and is mounted on the housing. The light-incident surface has an edge light-incident region near the mounting portion. A light source is disposed within the housing. The light-emitting area of the light source is disposed facing the light-incident surface. The light-emitting area includes an edge light-emitting area in a second direction. In the projection in a third direction, the edge light-emitting area is disposed facing the edge light-incident area of the light-incident surface and offset from the light-emitting surface. Light rays emanating from the edge light-emitting area of the light source can enter the light guide through the edge light-incident area and deflect toward the light-emitting surface; The first direction, the second direction, and the third direction intersect each other. Attached Figure Description
[0006] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0007] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the audio device provided by the present invention; Figure 2 for Figure 1 A top view of the structure of the central acoustic unit; Figure 3 for Figure 2 Schematic diagram of the structure of section AA; Figure 4 for Figure 3 A magnified structural diagram of part B in the middle; Figure 5 for Figure 4 Schematic diagram of the principle analysis of the light guide and light source; Figure 6 A flowchart illustrating the steps of an embodiment of the design method provided by the present invention.
[0008] Explanation of icon numbers: 100. Audio equipment; 1. Housing; 11. Sound-generating structure; 12. Mounting clips; 13. Limiting protrusions; 2. Light guide; 21. Polarizing section; 22. Mounting section; 221. Mounting hole; 23. Groove; 24. First end; 25. Second end; 2a. Light-incident surface; 21a. Edge light-incident area; 22a. First light-incident area; 221a. Deflected light-incident area; 23a. Second light-incident area; 2b. Light-exit surface; 21b. Compensated light-exit area; 22b. Main light-exit area; 3. Light source; 3a. Edge luminous region; 31a. First boundary ray; 32a. Second boundary ray; 3b. First luminous region; 3c. Second luminous region; 3d. Optical axis; c. First vertex; e. Second vertex; g. Third vertex; h. Fourth vertex; X, first direction; Y, second direction; Z, third direction.
[0009] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0010] The technical solutions of the embodiments of the present invention 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 the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.
[0011] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0012] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.
[0013] Currently, consumers' demands for electronic devices are no longer limited to basic functions, but are paying more attention to the appearance design, interactive experience, and user-friendly details. For example, audio products often include light-emitting structures, which work in conjunction with the sound-emitting structures to provide users with a dual visual and auditory experience. However, in some audio products, the overall brightness of the light-emitting surface of the light-emitting structure does not meet the requirements.
[0014] The reason for this is that light-emitting structures typically include a light source and a light guide. In order to better adapt to the appearance and shape of the product, the light guide and the light source are designed to be structurally compatible. However, this design usually compresses the optical design space, which often includes, but is not limited to, misalignment of the light incident surfaces of the light source and the light guide. This results in more stray light emitted by the light source. This stray light cannot be emitted from the light exiting surface of the light guide, resulting in the overall brightness of the light exiting surface not meeting the requirements. Traditional solutions usually increase the number of light sources or increase the size of the light sources to improve the overall brightness of the light exiting surface, but this also increases the production cost.
[0015] In view of this, the present invention provides an audio device and its design method. The light-incident surface of the light guide of the conventional audio device is designed to increase the edge light-incident area. Through the edge light-incident area, stray light that is originally deviated from the light-emitting surface of the light source can be refracted to the light-emitting surface. This can at least improve the problem that the overall brightness of the light-emitting surface of the light-emitting structure in some current audio products does not meet the requirements.
[0016] To facilitate understanding of the light-emitting structure provided by this invention, it is described below in conjunction with the accompanying drawings, wherein... Figure 1 A three-dimensional structural schematic diagram of an embodiment of the audio device provided by the present invention; Figure 2 for Figure 1 A top view of the structure of the central acoustic unit; Figure 3 for Figure 2 Schematic diagram of the structure of section AA; Figure 4 for Figure 3 A magnified structural diagram of part B in the middle; Figure 5 for Figure 4 Schematic diagram of the principle analysis of the central light guide and the light source.
[0017] Please see Figure 3 and Figure 4 In one embodiment of the present invention, the speaker 100 includes a housing 1, a light guide 2, and a light source 3; a sound-emitting structure 11 is disposed inside the housing 1; the light guide 2 has a light-incident surface 2a and a light-exit surface 2b in a first direction X, and a mounting portion 22 is disposed at one end of the light guide 2 in a second direction Y, the mounting portion 22 extending away from the light-exit surface 2b in the first direction X and being mounted on the housing 1; the light-incident surface 2a has an edge light-incident region 21a near the mounting portion 22; the light source 3 is disposed inside the housing 1, and the light... The light-emitting area of the source 3 is disposed toward the light-incident surface 2a. The light-emitting area includes an edge light-emitting area 3a located in the second direction Y. In the projection of the third direction Z, the edge light-emitting area 3a is disposed toward the edge light-incident area 21a of the light-incident surface 2a and is offset from the light-emitting surface 2b. The light rays emitted from the edge light-emitting area 3a of the source 3 can enter the light guide 2 through the edge light-incident area 21a and be deflected toward the light-emitting surface 2b. The first direction X, the second direction Y and the third direction Z intersect each other.
[0018] The position of the "light guide 2" on the housing 1 can vary depending on different requirements, for example, in Figure 1 In the embodiment shown, the housing 1 has a corner area, and the light guide 2 is disposed in the corner area. With the help of the light guide 2 and the light source 3, the outline of the housing 1 can be displayed. The light-incident surface 2a of the light guide 2 is usually disposed facing the inside of the housing 1, and the light-exit surface 2b of the light guide 2 is usually disposed facing the outside of the housing 1.
[0019] The “mounting part 22” is part of the structure of the light guide 2, so its material is also a light-transmitting material. There are many ways to mount the mounting part 22 to the housing 1. For example, the mounting part 22 can be attached to the housing 1 by its surface facing away from the light-emitting surface 2b in the second direction Y. This embodiment does not limit this.
[0020] The light source 3 in this embodiment of the invention is a Lambertian light source 3, and its divergence angle is typically 120°; to facilitate understanding of the features and definitions in this embodiment, the following is combined with Figure 5 To clarify, regarding "the luminous area of light source 3 facing the incident surface 2a", the range of the incident surface 2a is defgh, and the luminous area of light source 3 is doh. The two boundary points d and h of the incident surface 2a in the third-direction Z projection coincide with the two boundary rays od and oh emitted from the luminous area of light source 3. "Edge luminous area 3a" refers to the ∠doe region. The light rays emitted from the edge luminous area 3a are offset from the exiting surface 2b, and the first boundary ray 31a points to the top edge point a of the exiting surface 2b. "Edge incident light area 21a" refers to the de region, based on the above "luminous area of light source 3". The definition of "towards the light-incident surface 2a" is not elaborated here. The edge light-incident area 21a of the edge light-incident area 3a towards the light-incident surface 2a is designed so that the light rays emitted from the edge light-incident area 3a of the light source 3 can enter the light guide 2 through the edge light-incident area 21a and deflect towards the light-out surface 2b. For example, the light path of the second boundary light 32a originally emitted from the edge light-incident area 3a is odb. After being refracted by the de area, the light path of the second boundary light 32a changes and becomes the oda light path.
[0021] "The first direction X, the second direction Y, and the third direction Z intersect each other" can be understood as the presence of an angle between each pair of the first direction X, the second direction Y, and the third direction Z. This angle can take any value between 0° and 180°. Usually, this angle is 90°, which means that the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.
[0022] In the technical solution provided by the present invention, the light-incident surface 2a of the light guide 2 has an edge light-incident region 21a. The edge light-incident region 21a is positioned opposite to the edge light-emitting region 3a of the light source 3. That is, the light emitted from the edge light-emitting region 3a of the light source 3 can illuminate the edge light-incident region 21a. Under the influence of the refraction of the edge light-incident region 21a, the light path is shifted from the original direction deviating from the light-emitting surface 2b to the direction towards the light-emitting surface 2b. Compared with the current speaker 100 solution, this technical solution, through the setting of the edge light-incident region 21a, shifts the stray light emitted from the edge light-emitting region 3a of the light source 3 to the light-emitting surface 2b. Through a purely optical design, the overall brightness of the light-emitting surface 2b is improved, which not only solves the above-mentioned technical problems, but also effectively controls the production cost of the speaker 100.
[0023] Please see Figure 4 and Figure 5In one embodiment, a polarizing portion 21 is provided on the inner side of the light guide 2, an incident light surface 2a is formed on the polarizing portion 21, and a groove 23 is formed between the polarizing portion 21 and the mounting portion 22.
[0024] The "polarizing part 21" is also part of the structure of the light guide 2, so its material is also a light-transmitting material. The light guide 2, which has the mounting part 22 and the polarizing part 21, can be integrally injection molded.
[0025] In the above technical solution, a groove 23 is formed between the polarizing part 21 and the mounting part 22. On the one hand, the setting of the groove 23 can reduce the degree of cooling shrinkage after the light guide 2 is injection molded, which is conducive to ensuring the dimensional accuracy of the light guide 2. On the other hand, the existence of the groove 23 reduces the production material of the light guide 2 and reduces the production cost of the light guide. Furthermore, the existence of the groove 23 makes the mounting part 22 have installation space on both sides along the second direction Y, giving the mounting part 22 more installation possibilities with the housing 1.
[0026] For example in Figure 4 In the embodiment shown, a limiting protrusion 13 is provided on the housing 1, which extends into the groove 23 to position the light guide 2.
[0027] Furthermore, the mounting part 22 is provided with a mounting hole 221, which extends through to the groove 23 along the second direction Y; a mounting buckle 12 is provided inside the housing 1, which engages with the mounting hole 221.
[0028] In the above technical solution, by attaching the mounting buckle 12 to the mounting hole 221, the light guide 2 can be detachably installed relative to the housing 1. The mounting hole 221 extends through the groove 23 along the second direction Y. Due to the presence of the groove 23, the processing depth requirement of the mounting hole 221 can be reduced.
[0029] Please see Figure 4 and Figure 5 In one embodiment, the light guide 2 has a first end 24 and a second end 25 in the second direction Y, and the mounting part 22 is disposed at the first end 24; the light-incident surface 2a of the light guide 2 also has a first light-incident region 22a, the first light-incident region 22a is located between the optical axis 3d of the light source 3 and the edge light-incident region 21a, the first light-incident region 22a has at least two deflected light-incident regions 221a, the at least two deflected light-incident regions 221a are distributed from the optical axis 3d of the light source 3 to the edge light-incident region 21a; wherein, in the direction close to the optical axis 3d, the average curvature of the at least two deflected light-incident regions 221a gradually increases.
[0030] The light-emitting area of the light source 3 typically also includes a first light-emitting area 3b, which is positioned facing the first incident light area 22a, such as... Figure 5 As stated above.
[0031] Regarding the statement "the first incident light region 22a has at least two deflecting incident light regions 221a," the number of deflecting incident light regions 221a can be two, three, or even more. It is understandable that the more deflecting incident light regions 221a there are, the better the continuity of the first incident light region 22a, and the less likely the light-emitting surface 2b will have dark areas or breaks in its lines. Conversely, the fewer deflecting incident light regions 221a there are, for example... Figure 5 As shown, two incident light deflection regions 221a are provided, and there is an intersection point f between the two incident light deflection regions 221a. When generating the surface shape of the first incident light region 22a iteratively using optical software, fewer calculations are required, which can reduce the pressure on the equipment and improve design efficiency.
[0032] "Average curvature" represents the overall distribution of curvature at multiple points in the deflected light-incident region 221a, that is, the overall degree of curvature of the deflected light-incident region 221a. The greater the average curvature of the deflected light-incident region 221a, the greater the degree to which it deflects the light rays away from the optical axis 3d. For example... Figure 5 In the above, the average curvature of the deflected light-incident region 221a corresponding to segment fg is significantly greater than the average curvature of the deflected light-incident region 221a corresponding to segment ef.
[0033] Considering that the light source 3 has a Lambertian distribution, the light intensity is usually greater closer to the optical axis 3d of the light source 3. In the above technical solution, the average curvature of at least two deflected light-incident regions 221a is gradually increased in the direction close to the optical axis 3d. This means that the deflected light-incident regions 221a can reduce the light intensity in the region close to the optical axis 3d, thereby increasing the light intensity in the region far from the optical axis 3d, which is beneficial to improving the light emission uniformity of the light-emitting surface 2b.
[0034] Please continue to participate. Figure 5 In one embodiment, the light-incident surface 2a of the light guide 2 further has a second light-incident region 23a, which is located on the side of the optical axis 3d of the light source 3 near the second end 25 of the light guide 2; the light-emitting region of the light source 3 includes a second light-emitting region 3c, which is disposed toward the second light-incident region 23a; the light-emitting surface 2b has a main light-emitting region 22b and a compensation light-emitting region 21b, which is disposed near the second end 25 of the light guide 2 and offset from the second light-emitting region 3c of the light source 3; wherein, the second light-incident region 23a is configured to increase the divergence angle of the second light-emitting region 3c, so that the light rays diverging from the second light-emitting region 3c can be deflected toward the compensation light-emitting region 21b.
[0035] Based on the above definition of "the light-emitting area of the light source 3 is oriented toward the light-incident surface 2a", the "the second light-emitting area 3c is oriented toward the second light-incident area 23a" will not be elaborated here.
[0036] With the help of Figure 5 Analysis shows that the main light-emitting region 22b is region ai, the compensated light-emitting region 21b is region ij, and the original light path of the third boundary light of the second light-emitting region 3c is the oi light path. Point i is the intersection of the main light-emitting region 22b and the compensated light-emitting region 21b. The divergence angle of the second light-emitting region 3c is ∠goi. After the third boundary light passes through the incident point h of the second incident region 23a and enters the light guide 2, the light path is deflected and becomes the ohj light path. Therefore, the setting of the second incident region 23a can increase the divergence angle of the second light-emitting region 3c.
[0037] In the above technical solution, a second light-incident area 23a is provided on the light-incident surface 2a of the light guide 2. By designing the surface shape of the second light-incident area 23a, the divergence angle of the second light-emitting area 3c can be increased by means of the surface shape of the second light-incident area 23a, so that the light emitted from the second light-emitting area 3c can be deflected toward the compensation light-emitting area 21b, and finally the brightness of the compensation light-emitting area 21b is compensated, thereby improving the problem of dark areas at the edges of the light-emitting surface 2b.
[0038] This invention also provides a design method; please refer to [link / reference]. Figure 6 This design method is used to design the light-incident surface 2a of the light guide 2 in the audio 100 of any of the above embodiments, wherein the mounting portion 22 is provided to block the edge light-emitting area 3a of the light source 3; The design methodology includes the following steps: S10. Based on the relative position information between the light source 3 and the original light guide 2, determine the first simulated light information of the light source 3 in the third direction Z projection. The first simulated light information includes the light emitted from the edge light-emitting area 3a of the light source 3. The original light guide 2 also includes a mounting part 22. In the combination of the original light guide 2 and the light source 3, the light emitted from the edge light-emitting area 3a of the light source 3 shines on the mounting part 22, causing a reduction in light efficiency. By using optical software, the model of the distribution of the original light guide 2 and the light source 3 can be imported into it, and the first simulated light information of the light source 3 in the third-direction Z projection can be simulated.
[0039] S20. Select a first vertex c at the end of the mounting part 22 away from the light-emitting surface 2b, select a second vertex e on the first boundary ray 31a emanating from the edge light-emitting region 3a, and define an edge optimization region between the first vertex c and the second vertex e, wherein the first boundary ray 31a is set away from the mounting part 22. Regarding "selecting the first vertex c at the end of the mounting section 22 furthest from the light-emitting surface 2b", combined with... Figure 5 It can be seen that the direct point of the second boundary ray 32a emitted from the edge luminous region 3a at the mounting part 22 is b, and the bottom end point of the mounting part 22 is c. The "first vertex c" can be arbitrarily selected between point b and point c. Considering the internal space of the housing 1, processing feasibility, and light path deflection, the closer the first vertex c is to the light source 3, the easier it is to design convergence. The farther the first vertex c is from the light source 3, the lower the final thickness and processing difficulty of the light guide 2 will be. The design can be made according to the actual situation. Although the "second vertex e" can be arbitrarily selected on the first boundary ray 31a, the incident angle requirement of light path deflection should also be considered to ensure that the light emitted from the edge luminous region 3a is refracted in the edge optimization region rather than reflected.
[0040] S30. Taking the deviation of the light rays emitted from the edge light-emitting region 3a to the light-emitting surface 2b as the optimization target, the surface shape of the edge optimization region is determined, wherein the edge optimization region includes the edge light-incident region 21a of the light-incident surface 2a.
[0041] This step does not specify the exact direction in which the light rays emanating from the edge-emitting region 3a are deflected to the light-emitting surface 2b, for example... Figure 5 In the middle, the second boundary light 32a emitted from the edge light-emitting region 3a is deflected and can illuminate the top edge point a of the light-emitting surface 2b; the edge optimization region includes the edge light-incident region 21a of the light-incident surface 2a, and of course also includes the cd region.
[0042] In the above technical solution, by taking advantage of the design starting point of the mounting part 22 of the original light guide 2, the surface shape of the edge light-incident area 21a can be designed in a targeted manner, thereby shifting the light originally illuminating the mounting part 22 to the light-emitting surface 2b of the light guide 2.
[0043] Further, please refer to Figure 5 In one embodiment, a polarizing part 21 is provided on the inner side of the light guide 2, and a light incident surface 2a is formed on the polarizing part 21. A groove 23 is formed between the polarizing part 21 and the mounting part 22. After determining the surface shape of the edge optimization region, the process includes: The area outside the edge-emitting area is selected as the area to be adjusted; The area to be adjusted refers to Figure 5 The cd region in the image; since the region to be adjusted does not participate in the refraction of light, the solid part of the light guide 2 corresponding to the region to be adjusted can be appropriately cut.
[0044] Using the refracted light path of the second boundary ray 32a emanating from the edge light-emitting region 3a and the mounting part 22 as the boundary, the cross-sectional shape of the groove 23 in the third direction Z projection is determined in the area to be adjusted, wherein the second boundary ray 32a is set close to the mounting part 22. Combination Figure 5 It can be seen that "second boundary ray 32a" is an od ray, "the refracted light path of second boundary ray 32a" is a dr light path; "the cross-sectional shape of groove 23 in the third direction Z projection" is a drc.
[0045] The optimized surface shape of the edge optimization region is determined based on the cross-sectional shape. Combination Figure 5 It can be seen that the "surface shape after edge optimization region optimization" is edrc.
[0046] In the above technical solution, the refracted light path of the second boundary light ray 32a and the mounting part 22 are used as boundaries. The groove 23 processed in this way will not damage the original structure of the mounting part 22, nor will it affect the direction of the refracted light path of the second boundary light ray 32a. It can also reduce the degree of cooling shrinkage after the light guide 2 is injection molded, which is conducive to ensuring the dimensional accuracy of the light guide 2.
[0047] Further, in one embodiment, after determining the first simulated ray information of the light source 3 in the third-party projection Z, the process includes: Select a third vertex g on the optical axis 3d of the light source 3, and define the first light-incident region 22a of the light-incident surface 2a between the third vertex g and the second vertex e; Among them, the "third vertex g" is usually set close to the light-emitting surface 2b of the light guide 2.
[0048] At least one fitting point is selected between the third vertex g and the second vertex e, and the at least one fitting point divides the first incident light region 22a into at least two deflected incident light regions 221a. Combination Figure 5 It can be seen that there is one fitting point, which divides the first incident light region 22a into two deflected incident light regions 221a; the above embodiment mentions that there is an intersection point f between the two deflected incident light regions 221a, and this intersection point f is the fitting point.
[0049] Using the position of the fitting point and the average curvature of at least two deflected light-incident regions 221a as variables, and taking the light emission uniformity of the light-incident surface 2b as the second optimization objective, the surface shape of the first light-incident region 22a of the light-incident surface 2a is determined.
[0050] Among them, the position of the fitting point and the average curvature of the deflected light-incident region 221a are multiple variables. Taking the light emission uniformity of the light-emitting surface 2b as the second optimization objective, reasonable values of multiple variables can be determined simultaneously. Based on multiple reasonable values, the surface shape of the first light-incident region 22a of the light-incident surface 2a can be determined. The introduction of the fitting point divides the first light-incident region 22a into at least two deflected light-incident regions 221a, which can improve the problem that the optimization difference of the first light-incident region 22a is too large, which makes it impossible to complete the surface design in the end, and ensure the continuity of the first light-incident region 22a.
[0051] Furthermore, in one embodiment, the light guide 2 has a first end 24 and a second end 25 in the second direction Y, and the mounting part 22 is disposed at the first end 24; the light emitting surface 2b has a main light emitting area 22b and a compensation light emitting area 21b, and the compensation light emitting area 21b is disposed near the second end 25 of the light guide 2; After determining the surface shape of the first incident region 22a of the incident surface 2a, the following is included: The information of the third vertex g is determined based on the surface shape of the first light-incident area 22a. The fourth vertex h is selected on the third boundary ray emanating from the second light-emitting area 3c. The second light-incident area 23a of the light-incident surface 2a is defined between the third vertex g and the fourth vertex h. The information of the fourth vertex h is determined based on the refraction of the third boundary ray through the fourth vertex h to the edge point of the compensated light-emitting area 21b. Among them, "third vertex g information" refers to relevant information about the third vertex g, including its position information and the tilt angle of the tangent of the first light-receiving region 22a of the light-receiving surface 2a at the third vertex g relative to the optical axis 3d; "fourth vertex h information" refers to relevant information about the fourth vertex h, including its position information and the incident angle of the third boundary ray at the fourth vertex h. "Edge point of the compensated light-emitting region 21b" refers to the edge point of the compensated light-emitting region 21b that is far from the main light-emitting region 22b. Figure 5 In the equation, the edge point is point j.
[0052] The information of the third vertex g and the information of the fourth vertex h are imported into the optical software, and the surface shape of the second light-incident region 23a of the light-incident surface 2a is determined with the light-incident surface 2b along the two directions as the third optimization target.
[0053] Among them, there are many common optical software, such as Zemax, CodeV, LightTools, TracePro and ASAP; the third vertex g and the fourth vertex h can be used as the two boundary endpoints of the second light-incident region 23a in the third direction Z projection along the second direction Y. Based on the determination of the position and tilt angle of the boundary endpoints, the uniformity of light output of the light-emitting surface 2b along the two directions is taken as the third optimization target. With the help of optical software, the surface shape of the second light-incident region 23a in the third direction Z projection can be determined.
[0054] Furthermore, please combine Figure 5 In one embodiment, the information of the fourth vertex h is determined based on the refraction of the third boundary ray through the fourth vertex h to the edge point of the compensated light-emitting region 21b, including: Based on the refraction of the third boundary ray through the fourth vertex h to the edge point of the compensated light-emitting region 21b, the information of the fourth vertex h is determined, including: Connect the fourth vertex h with the edge point of the compensated light output region 21b to construct the boundary refraction light path and determine the deflection angle between the boundary refraction light path and the original light path of the third boundary ray; Among them, "boundary refraction light path" refers to Figure 5 In the context of the hj optical path, "the original optical path of the third boundary ray" refers to... Figure 5 In the optical path, "deflection angle" refers to... Figure 5 Since the position of point h has been selected, the size of ∠ihj can be determined.
[0055] Combining the deflection angle with the refractive index of the light guide 2, and taking the incident angle of the third boundary ray at the fourth vertex h as the unknown, the incident angle is obtained by solving using trigonometric functions; The incident angle of the third boundary ray at the fourth vertex h is ∠ohm. After analysis, ∠ohm is equal to ∠ihn, and ∠ihn = ∠ihj + ∠nhj, where ∠nhj is the refraction angle of the third boundary ray at the fourth vertex h. According to sin(∠ohm) / sin(∠ohm-∠ihj) equal to the refractive index of light guide 2, the incident angle ∠ohm can be obtained.
[0056] The information of the fourth vertex h includes the angle of incidence. The above description is merely an exemplary embodiment of the present invention and does not limit the scope of the patent. Any equivalent structural transformations made using the description and drawings of the present invention under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.
Claims
1. A sound system, characterized in that, include: A housing, wherein a sound-generating structure is provided inside the housing; A light guide has a light-incident surface and a light-exit surface in a first direction. A mounting portion is provided at one end of the light guide in a second direction. The mounting portion extends away from the light-exit surface in the first direction and is mounted on the housing. The light-incident surface has an edge light-incident area near the mounting portion. as well as, A light source is disposed within the housing. The light-emitting area of the light source is disposed facing the light-incident surface. The light-emitting area includes an edge light-emitting area in a second direction. In the projection in a third direction, the edge light-emitting area is disposed facing the edge light-incident area of the light-incident surface and offset from the light-emitting surface. Light rays emanating from the edge light-emitting area of the light source can enter the light guide through the edge light-incident area and deflect toward the light-emitting surface; The first direction, the second direction, and the third direction intersect each other.
2. The audio system as described in claim 1, characterized in that, A polarizing portion is provided on the inner side of the light guide, the light incident surface is formed on the polarizing portion, and a groove is formed between the polarizing portion and the mounting portion.
3. The audio system as described in claim 2, characterized in that, The mounting part is provided with a mounting hole, which extends through the groove along the second direction; The housing is provided with a mounting buckle, which engages with the mounting hole.
4. The audio system as described in claim 1, characterized in that, The light guide has a first end and a second end in the second direction, and the mounting portion is disposed at the first end; The light guide further has a first light-incident area on its light-incident surface. The first light-incident area is located between the optical axis of the light source and the edge light-incident area. The first light-incident area has at least two deflected light-incident areas, which are distributed from the optical axis of the light source to the edge light-incident area. In particular, the average curvature of the at least two deflected light-incident regions is gradually increased in the direction close to the optical axis.
5. The audio system as described in claim 4, characterized in that, The light-incident surface of the light guide also has a second light-incident area, which is located on the side of the light axis of the light source near the second end of the light guide. The light-emitting area of the light source includes a second light-emitting area, which is disposed facing the second light-incident area; The light-emitting surface has a main light-emitting area and a compensation light-emitting area. The compensation light-emitting area is located near the second end of the light guide and is located away from the second light-emitting area of the light source. The second incident light region is configured to increase the divergence angle of the second light emitting region, so that the light rays diverging from the second light emitting region can be deflected toward the compensated light emitting region.
6. A design method for designing the light-incident surface of a light guide in an audio system as described in any one of claims 1 to 5, wherein the mounting portion is configured to block the edge light-emitting area of the light source, characterized in that... The design method includes the following steps: Based on the relative position information of the light source and the original light guide, the first simulated light information of the light source in the third-party projection is determined, and the first simulated light information includes light emitted from the edge light-emitting area of the light source; A first vertex is selected at the end of the mounting portion away from the light-emitting surface, a second vertex is selected on the first boundary light ray emanating from the edge light-emitting area, and an edge optimization area is defined between the first vertex and the second vertex, wherein the first boundary light ray is positioned away from the mounting portion; The surface shape of the edge optimization region is determined with the goal of deflecting the light emitted from the edge light-emitting region to the light-emitting surface. The edge optimization region includes the edge light-incident region of the light-incident surface.
7. The design method as described in claim 6, characterized in that, A polarizing portion is provided on the inner side of the light guide, the light incident surface is formed on the polarizing portion, and a groove is formed between the polarizing portion and the mounting portion; After determining the surface shape of the edge optimization region, the process includes: The area outside the edge luminous area of the edge optimization region is selected as the region to be adjusted. Using the refracted light path of the second boundary light ray emitted from the edge light-emitting area and the mounting part as the boundary, the cross-sectional shape of the groove in the third-direction projection is determined in the area to be adjusted, wherein the second boundary light ray is positioned close to the mounting part; The optimized surface shape of the edge optimization region is determined based on the cross-sectional shape of the groove.
8. The design method as described in claim 6, characterized in that, After determining the first simulated ray information of the light source in the third-party projection, the process includes: A third vertex is selected on the optical axis of the light source, and a first light-incident region of the light-incident surface is defined between the third vertex and the second vertex; At least one fitting point is selected between the third vertex and the second vertex, and the at least one fitting point divides the first incident light region into at least two deflected incident light regions. Using the position of the fitting point and the average curvature of the at least two deflected incident light regions as variables, and taking the light emission uniformity of the light-emitting surface as the second optimization objective, the surface shape of the first incident light region of the incident light surface is determined.
9. The design method as described in claim 8, characterized in that, The light guide has a first end and a second end in the second direction, and the mounting part is disposed at the first end; the light emitting surface has a main light emitting area and a compensation light emitting area, and the compensation light emitting area is disposed near the second end of the light guide. After determining the surface shape of the first light-incident region of the light-incident surface, the process includes: The third vertex information is determined based on the surface shape of the first light-incident area. A fourth vertex is selected on the third boundary light rays emanating from the second light-emitting area. The second light-incident area of the light-incident surface is defined between the third vertex and the fourth vertex. The fourth vertex information is determined based on the third boundary light rays being refracted through the fourth vertex to the edge point of the compensated light-emitting area. The information of the third vertex and the information of the fourth vertex are imported into the optical software, and the surface shape of the second light-incident region of the light-incident surface is determined with the light-incident surface uniformity along the two directions as the third optimization target.
10. The design method as described in claim 9, characterized in that, The determination of the fourth vertex information based on the refraction of the third boundary ray through the fourth vertex to the edge point of the compensated light-emitting region includes: The determination of the fourth vertex information based on the refraction of the third boundary ray through the fourth vertex to the edge point of the compensated light-emitting region includes: Connect the fourth vertex to the edge point of the compensated light output region to construct a boundary refraction light path, and determine the deflection angle between the boundary refraction light path and the original light path of the third boundary ray; By combining the deflection angle and the refractive index of the light guide, and taking the incident angle of the third boundary ray at the fourth vertex as the unknown, the incident angle is obtained by solving using trigonometric functions; The fourth vertex information includes the incident angle.