Light guide plate, light-emitting unit and loudspeaker

Abstract

The utility model discloses a light guide plate, a light-emitting unit and a loudspeaker, and the light guide plate is of an annular structure and comprises a light-emitting surface; the light-in surface is arranged opposite to the light-out surface; the light incident surface comprises an avoiding area and a lattice point area; the avoiding area is provided with a plurality of light holes, and the light holes correspond to the light sources in position; a plurality of net points are regularly arranged in the net point area, and the density of the net points is gradually increased in the direction, away from the avoiding area, of the net points. According to the arrangement position of the light source, the lattice points with different densities are arranged on the light incident surface of the light guide plate, so that the light guide plate can uniformly emit light on the basis that the avoiding area is arranged, and a complete annular light emitting effect can be formed.

Description

Technical Field

[0001] The utility model relates to a light guide plate, a light emitting unit and a loudspeaker. Background Art

[0002] Currently, if a relatively large circular ring is to achieve uniform light emission, generally, a circle of LEDs is evenly distributed along the shape of the circular ring, so that the light emitting surface of the circular ring emits light evenly. However, this method requires more LED chips and a larger lamp board area, both of which will bring additional cost increases.

[0003] In addition, there is a prior art solution that uses a light guide plate to achieve partial circular ring light emission. However, some structures of the light guide plate need to block the LEDs from emitting light, so there will be a problem that the light emitting circular ring is incomplete, which affects the light emitting effect.

[0004] In summary, there is a need to design a light guide plate and a light emitting unit to solve the above problems in the prior art.

[0005] The above information disclosed in this background art is only used to increase the understanding of the background art of this application. Therefore, it may include prior art that is not known to those of ordinary skill in the art. Summary of the Utility Model

[0006] The utility model aims at the problems of incomplete circular ring light emission and uneven light output in the prior art.

[0007] To achieve the above utility model / design purpose, the utility model adopts the following technical solutions:

[0008] A light guide plate, which has an annular structure and includes:

[0009] A light emitting surface;

[0010] An incident light surface, which is arranged opposite to the light emitting surface;

[0011] The incident light surface includes an avoidance area and a dot area;

[0012] A plurality of light transmission holes are provided in the avoidance area, and the light transmission holes are arranged corresponding to the positions of the light sources;

[0013] The dot area has a number of dots arranged regularly, and the density of the dots gradually increases in the direction away from the avoidance area.

[0014] In some embodiments of the utility model, the dot area includes a first dot area, a second dot area and a third dot area with gradually increasing dot density; the first dot area is adjacent to the avoidance area, the third dot area is opposite to the avoidance area; the second dot area is located between the first dot area and the third dot area.

[0015] In some embodiments of the present utility model, the sizes of the dots in the same dot area are not equal, and the size of the dots increases as the direction away from the light source.

[0016] In some embodiments of the present utility model, the shapes of the dots include circles and / or polygons.

[0017] In some embodiments of the present utility model, a blank area is further provided on the light incident surface, and the blank area is adjacent to the avoidance area.

[0018] In some embodiments of the present utility model, the distances between multiple light-transmitting holes are not equal, and the distances gradually increase as the direction away from the light source. This can improve the uniformity of light transmission of the light source.

[0019] In some embodiments of the present utility model, a light-shielding layer is provided in the avoidance area; the light-shielding layer covers the area in the avoidance area except for the light-transmitting holes. This can ensure that the light of the light source only penetrates upward from the light-transmitting holes.

[0020] In some embodiments of the present utility model, in the first dot area, the distance between two adjacent dots is 1 ± Δ mm;

[0021] In the second dot area, the distance between two adjacent dots is 1.4 ± Δ mm;

[0022] In the third dot area, the distance between two adjacent dots is 1.9 ± Δ mm, where Δ is a fluctuation value not greater than 0.1 mm.

[0023] In some embodiments of the present utility model, a light-emitting unit is further provided, which includes the above-mentioned light guide plate and light source.

[0024] In some embodiments of the present utility model, a reflective film is attached to the light incident surface, and the area of the reflective film is not less than the area of the dot area.

[0025] In some embodiments of the present utility model, a loudspeaker is further provided, which includes the above-mentioned light-emitting unit, a loudspeaker body and a diffusion plate; the loudspeaker body is embedded with the light guide plate; the diffusion plate includes a first connection surface and a second connection surface, the first connection surface is connected to the housing, and the second connection surface is connected to the loudspeaker body; the second connection surface is closer to the light guide plate than the first connection surface.

[0026] Compared with the prior art, the advantages and positive effects of the present utility model are:

[0027] According to the installation position of the light source, the present utility model provides different density dots on the light incident surface of the light guide plate, which can make the light guide plate emit light evenly on the basis of being provided with an avoidance area; in addition, light-transmitting holes are added in the avoidance area to form a complete annular light-emitting effect.

[0028] In addition, when the light guide plate and the light-emitting unit are applied to a loudspeaker, the added diffusion plate can not only ensure the acoustic effect, but also play a role in light and color uniformity.

[0029] After reading the specific embodiments of the present utility model in conjunction with the drawings, other features and advantages of the present utility model will become clearer. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 is a schematic structural view of an embodiment of the light guide plate proposed by the present utility model Figure 1 ;

[0032] Figure 2 is a schematic structural view of an embodiment of the light guide plate proposed by the present utility model Figure 2 ;

[0033] Figure 3 is Figure 2 the top view of;

[0034] Figure 4 is a schematic structural view of an embodiment of the light-emitting unit proposed by the present utility model;

[0035] Figure 5 is Figure 4 the exploded view of the structure in;

[0036] Figure 6 is a schematic structural view of an embodiment of the loudspeaker proposed by the present utility model;

[0037] Figure 7 is Figure 6 the exploded view of the structure in;

[0038] Figure 8 is a schematic structural view of an embodiment of the diffusion plate proposed by the present utility model.

[0039] In the figure, 100 is a light guide plate; 110 is a light-emitting surface; 120 is a light-incident surface; 130 is an avoidance area; 131 is a light-transmitting hole; 140 is a dot area; 141 is a first dot area; 142 is a second dot area; 143 is a third dot area; 150 is a blank area; 160 is a fixing ear plate; 200 is a light source; 210 is a lamp bead; 220 is a PCB board; 230 is a reflective film; 300 is a speaker; 310 is a speaker body; 320 is a diffusion plate; 321 is a first connection surface; 322 is a second connection surface; 323 is an inclined surface; 330 is a fixing support plate; 340 is a hollow fixing plate; 350 is a support member; 360 is a housing. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be construed as a limitation to the present invention.

[0042] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. In the description of the implementation manners, specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0043] The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0044] In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0045] Example 1: Refer to Figure 1 and Figure 2 As shown, a light guide plate 100 has an annular structure and includes:

[0046] An outgoing light surface 110;

[0047] An incoming light surface 120, which is disposed opposite to the outgoing light surface 110;

[0048] The incoming light surface 120 includes an avoidance area 130 and a dot area 140;

[0049] A plurality of light-transmitting holes 131 are provided in the avoidance area 130, and the light-transmitting holes 131 are disposed corresponding to the position of the light source 200;

[0050] The dot area 140 has a number of dots arranged regularly, and the density of the dots gradually increases in the direction away from the avoidance area 130.

[0051] The dots provided on the incoming light surface 120 are structures sunken towards the inside of the light guide plate 100, and this sunken structure can increase the reflection of light relative to the plane.

[0052] The closer to the light source 200, the greater the light intensity, that is, the more light rays. Fewer dot distributions can reflect more light rays; the farther away from the light source 200, the smaller the light intensity, that is, the fewer light rays. Therefore, more dot distributions are required to achieve more light rays to match the effect of reflecting light rays in other areas of the light guide plate 100.

[0053] At the same time, the position of the avoidance area 130 corresponds to the position of the light source 200, and a plurality of light-transmitting holes 131 are provided in the avoidance area 130, so that the avoidance area 130 can also transmit part of the light, so that the light guide plate 100 can present a complete annular light-emitting effect.

[0054] In some embodiments of the present invention, continue to refer to Figure 2 and Figure 3 As shown, the dot area 140 includes a first dot area 141, a second dot area 142, and a third dot area 143 with gradually increasing dot densities; the first dot area 141 is adjacent to the avoidance area 130, the third dot area 143 is disposed opposite to the avoidance area 130; the second dot area 142 is located between the first dot area 141 and the third dot area 143.

[0055] In some embodiments of the present invention, in order to improve the light output uniformity of the light guide plate 100, dot areas 140 with different densities are provided according to the different distances between each area on the light guide plate 100 and the light source 200.

[0056] For the first dot area 141, which is adjacent to the avoidance area 130, that is, the closest to the light source 200. Therefore, in order to increase the uniformity of light guiding, the dot distribution in the first dot area 141 is sparse, that is, a small amount of light is reflected.

[0057] Specifically, within the first dot area 141, the distance between two adjacent dots is 1 ± Δ mm, where Δ is a fluctuation value not greater than 0.1 mm.

[0058] For the second dot area 142, it is arranged adjacent to the first dot area 141 along the direction away from the light source 200. The dot density within the second dot area 142 is greater than that of the first dot area 141, and it can reflect relatively more light than the first dot area 141.

[0059] Specifically, within the second dot area 142, the distance between two adjacent dots is 1.4 ± Δ mm, where Δ is a fluctuation value not greater than 0.1 mm.

[0060] For the third dot area 143, its two ends are connected to the second dot area 142. The third dot area 143 is located on the opposite side of the avoidance area 130, that is, the farthest from the light source 200, and less light is transmitted to the third dot area 143. Therefore, the dot density of the third dot area 143 is set to be greater, and its density is greater than that of the second dot area 142, so as to achieve more light reflection and achieve the effect of uniform light emission of the light guide plate 100.

[0061] Specifically, within the third dot area 143, the distance between two adjacent dots is 1.9 ± Δ mm, where Δ is a fluctuation value not greater than 0.1 mm.

[0062] In some embodiments of the present invention, referring to Figure 3 As shown, in order to further reduce the light emission intensity of the light guide plate 100 near the light source 200, the light incident surface 120 is further provided with a blank area 150, and the blank area 150 is arranged adjacent to the avoidance area 130.

[0063] No dots are provided in the blank area 150, that is, no additional light reflection is added, and only the light guiding property of the light guide plate 100 is used for light emission, so that the light emission intensity of the blank area 150 matches that of each dot area 140.

[0064] In some embodiments of the present invention, within the same dot area 140, the sizes of all dots are the same, that is, the inner diameters and recess depths of all dots are the same. Dots of the same size facilitate simplifying the production process of the light guide plate 100.

[0065] In some embodiments of the present utility model, the sizes of the dots within the same dot area 140 may also be unequal, and the size of the dots increases as the direction away from the light source 200.

[0066] That is, within the same dot area 140, the size of the dots closer to the light source 200 is smaller than the size of the dots farther from the light source 200. The larger dot size can reflect more light and can make up for the light loss caused by being farther away from the light source 200.

[0067] In some embodiments of the present utility model, the shape of the dots includes but is not limited to one or more of a circle, a square, or a polygon.

[0068] In Figure 3 In the illustrated embodiment, the shapes of the dots within the dot area 140 are all circular. Since the reflection surface of a circle is arc-shaped and the direction of the reflected light is relatively uniform, the preferred shape of the dots is preferably circular.

[0069] In some embodiments of the present utility model, for the setting of the dots, it can be achieved by dot embossing or spraying white paint.

[0070] In some embodiments of the present utility model, the distances between the plurality of light-transmitting holes 131 are unequal, and the distance gradually increases as the direction away from the light source 200.

[0071] The light source 200 generally uses lamp beads 210, and the number of lamp beads 210 is one or more. To avoid too strong light at a certain point on the light guide plate 100, the light-transmitting holes 131 are not directly above the light source 200, and a plurality of light-transmitting holes 131 are provided to achieve the light-transmitting effect of the avoidance area 130, so that the light-emitting surface 110 of the light guide plate 100 is a complete annular structure.

[0072] In some embodiments of the present utility model, the shape and size of the light-transmitting holes 131 are set according to the position of the lamp beads 210 in the light source 200; preferably, the size of the light-transmitting holes 131 is gradually changing, and in the direction along the approach to the lamp beads 210, the size of the light-transmitting holes 131 gradually decreases. Because the closer to the lamp beads 210, the greater the light intensity, so it is necessary to reduce the size of the light-transmitting holes 131 to limit the emission of too much light.

[0073] In some embodiments of the present utility model, the avoidance area 130 is provided with a light-shielding layer; the light-shielding layer covers the area within the avoidance area 130 except the light-transmitting holes 131. It can ensure that the light of the light source 200 only transmits upward from the light-transmitting holes 131.

[0074] In some embodiments of the present utility model, for the setting of the light-transmitting holes 131, they can be openings made in the light-shielding member, such as die-cut openings in reflective paper; or the light-transmitting holes 131 can also be formed by painting the light guide plate 100, with the light-transmitting holes 131 being the areas that are not painted, thus forming the light-transmitting holes 131.

[0075] Compared with the prior art, the advantages and positive effects of the present utility model are:

[0076] According to the setting position of the light source 200, the present utility model opens dots with different densities on the light-incident surface 120 of the light guide plate 100, enabling the light guide plate 100 to achieve uniform light emission on the basis of having the avoidance area 130, and capable of forming a complete annular light-emitting effect.

[0077] Example 2: Refer to Figure 4 and Figure 5 As shown, this example provides a light-emitting unit, which includes the above-mentioned light guide plate 100 and light source 200; the light source 200 is arranged in the avoidance area 130 of the light guide plate 100. Specifically, the avoidance area 130 is a rectangular groove structure, and the light source 200 extends into this rectangular groove through the PCB board 220, and the light of the light source 200 enters the light guide plate 100 for divergent display.

[0078] The direct-lit LED used for the light source 200 emits light directly, and the light is relatively strong. Therefore, by passing through small holes for light transmission, a relatively strong brightness can be achieved, and by adjusting the aperture and density of the small holes, the purpose of making the overall brightness of the shaded part uniform can be achieved. Generally speaking, the mesh holes in the middle part of the avoidance area 130 are smaller, and the mesh holes in the outer part are larger, which is easier to achieve the overall uniform effect.

[0079] In some embodiments of the present utility model, a reflective film 230 is attached to the light-incident surface 120, and the area of the reflective film 230 is not less than the area of the dot area 140.

[0080] Specifically, the reflective film 230 is fixedly adhered to the light guide plate 100, and its radial dimension is equal to the radial dimension of the light-incident surface 120 in the radial direction, and the area of the reflective film 230 is equal to the area of the dot area 140 in the circumferential direction.

[0081] Example 3: Refer to Figure 6 and Figure 7As shown, this embodiment provides a speaker 300, which includes the above-mentioned light-emitting unit, a speaker body 310, and a diffusion plate 320; the speaker body 310 is embedded with the light guide plate 100; the diffusion plate 320 includes a first connection surface 321 and a second connection surface 322, the first connection surface 321 is connected to the housing 360, and the second connection surface 322 is connected to the speaker body 310; the second connection surface 322 is closer to the light guide plate 100 than the first connection surface 321.

[0082] Referring to Figure 8 As shown, the diffusion plate 320 has a horn-shaped structure with an opening in the middle, because the first connection surface 321 and the second connection surface 322 are connected by an inclined surface 323 in the middle; sealing members are provided on both the first connection surface 321 and the second connection surface 322, and the sealing members can be sealing foam, so that a closed space is formed in the front cavity of the speaker 300, which is beneficial to improving its acoustic effect.

[0083] The material of the diffusion plate 320 is not limited. Generally, substrates such as PC or PMMA are used, and diffusion particles are added inside, which has the function of uniform light and color.

[0084] Referring to Figure 7 As shown, the speaker 300 further includes a housing 360, which forms an installation space to facilitate the installation of the light guide plate 100 and the speaker body 310.

[0085] Specifically, a support member 350 is provided in the housing 360, and a plurality of mounting holes are provided on the support member 350 for fixing the light guide plate 100 and the speaker body 310; at the same time, fixing ear plates 160 are provided on the outer periphery of the light guide plate 100; the fixing ear plates 160 are fixedly connected to the support member 350 by cooperating with screws, etc.; in addition, fixing support plates 330 are also provided on the outer peripheries of the diffusion plate and the speaker body 310, and the fixing support plates 330 are fixedly connected to the support member 350 by cooperating with screws, etc. to fix the diffusion plate 320 and the speaker body 310.

[0086] During the installation process, the positions of the fixing support plates 330 and the fixing ear plates 160 are staggered, so as to save installation space and provide the stability of the installation structure.

[0087] In order to provide acoustic effects, a hollow fixed plate 340 is provided on one side of the housing 360 and on the side close to the speaker 300; the first connection surface 321 of the diffusion plate 320 is connected to the hollow fixed plate 340; effectively improving the acoustic effect.

[0088] Compared with the prior art, the advantages and positive effects of the present invention are:

[0089] When the light guide plate 100 and the light-emitting unit are applied in the loudspeaker 300, the added diffuser plate 320 can not only ensure the acoustic effect, but also play a role in uniform light and color.

[0090] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions required to be protected by the present invention.

Claims

1. A light guide plate, characterized in that: It is a ring structure, including: One with bright surface; a light incident surface, which is arranged opposite to the light emitting surface; The light incident surface includes an avoidance area and a grid area; The avoidance area is provided with a plurality of light-transmitting holes, and the light-transmitting holes are arranged corresponding to the positions of the light sources; The dot area has a plurality of dots arranged regularly, and the density of the dots gradually increases as the dots move away from the avoidance area.

2. The light guide plate according to claim 1, characterized in that: The dot area includes a first dot area, a second dot area and a third dot area with increasing dot density in sequence; the first dot area is adjacent to the avoided area, and the third dot area is opposite to the avoidance area; the second dot area is located between the first dot area and the third dot area.

3. The light guide plate according to claim 2, characterized in that: In the first dot area, the distance between two adjacent dots is 1±Δmm; In the second dot area, the distance between two adjacent dots is 1.4±Δmm; In the third dot area, the distance between two adjacent dots is 1.9±Δmm, wherein Δ is a fluctuation value not greater than 0.1mm.

4. The light guide plate according to claim 1, characterized in that: The sizes of the dots in the same dot area are different, and the size of the dots increases as they are farther away from the light source.

5. The light guide plate according to any one of claims 1 to 4, characterized in that: The shapes of the mesh dots include circular and / or polygonal.

6. The light guide plate according to claim 1, characterized in that: The light incident surface is also provided with a blank area, and the blank area is arranged adjacent to the avoidance area.

7. The light guide plate according to claim 1, characterized in that: The spacing between the plurality of light-transmitting holes is not equal, and the spacing gradually increases as the distance from the light source increases.

8. The light guide plate according to claim 1, characterized in that: The avoidance area is provided with a light-shielding layer; the light-shielding layer covers the area in the avoidance area except the light-transmitting hole.

9. A light emitting unit, characterized in that It comprises a light source and the light guide plate according to any one of claims 1 to 8.

10. A loudspeaker, characterized in that It comprises a speaker body, a diffusion plate and the light-emitting unit as claimed in claim 9; the speaker body is embedded in the light guide plate; the diffusion plate comprises a first connecting surface and a second connecting surface, the first connecting surface is connected to the shell, and the second connecting surface is connected to the speaker body; the second connecting surface is closer to the light guide plate than the first connecting surface.

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