Printed circuit board capable of preventing optical crosstalk

Abstract

The utility model relates to a printed circuit board capable of preventing optical crosstalk. The printed circuit board comprises a printed circuit board body and a plurality of light-emitting parts arranged on the printed circuit board body, the printed circuit board body comprises a first bearing surface and a second bearing surface, the first bearing surface and the second bearing surface are oppositely arranged, the first bearing surface is provided with a plurality of light-emitting parts, the adjacent light-emitting parts on the first bearing surface are arranged at intervals, the second bearing surface is provided with a plurality of light-emitting parts, and the adjacent light-emitting parts on the second bearing surface are arranged at intervals. The printed circuit board body is used for physically isolating the plurality of light-emitting parts on the first bearing surface from the plurality of light-emitting parts on the second bearing surface, and by utilizing the technical scheme provided by the invention, the condition of optical crosstalk between the adjacent light-emitting parts can be avoided in a limited space.

Description

Technical Field

[0001] This application relates to the technical field of circuit boards, and particularly to a printed circuit board for preventing light crosstalk. Background Art

[0002] A printed circuit board (PCB) is a support for electronic components and is used to achieve electrical connections between electronic components. Among them, the electronic components include LED lights. Specifically, LED lights are often soldered on the printed circuit board for external indication. If the LED lights are too close to each other, it will cause light crosstalk between adjacent LEDs, resulting in inaccurate indication. Among them, LED light crosstalk means that in multiple LED lights, due to the optical coupling effect between the LEDs, the light of one LED irradiates onto an adjacent LED, causing unnecessary lights to turn on, which will further affect the display effect and energy-saving performance of the LED lights. If the LED lights are too far apart, it will waste the area of the printed circuit board. Utility Model Content

[0003] To solve the problems of the prior art, this application provides a technical solution for a printed circuit board for preventing light crosstalk. That is, this application sets light-emitting components on both the first bearing surface and the second bearing surface that are oppositely arranged in the printed circuit board body, so as to physically isolate the light-emitting components on the first bearing surface from the light-emitting components on the second bearing surface by using the printed circuit board body, and further ensure that in a limited space, the situation of light crosstalk between adjacent light-emitting components is avoided.

[0004] This application provides a printed circuit board for preventing light crosstalk, which includes a printed circuit board body and a plurality of light-emitting components arranged on the printed circuit board body;

[0005] The printed circuit board body includes a first bearing surface and a second bearing surface, the first bearing surface and the second bearing surface are oppositely arranged, a plurality of the light-emitting components are arranged on the first bearing surface, the adjacent light-emitting components on the first bearing surface are arranged at intervals, a plurality of the light-emitting components are arranged on the second bearing surface, the adjacent light-emitting components on the second bearing surface are arranged at intervals, and the printed circuit board body is used to physically isolate the plurality of light-emitting components on the first bearing surface from the plurality of light-emitting components on the second bearing surface.

[0006] Further, the interval length between adjacent light-emitting components on the first bearing surface is equal to the interval length between adjacent light-emitting components on the second bearing surface.

[0007] Further, the interval length between adjacent light-emitting elements on the first bearing surface is greater than the interval length between adjacent light-emitting element projections on the printed circuit board body of the light-emitting elements on the first bearing surface and the interval length between adjacent light-emitting element projections on the printed circuit board body of the light-emitting elements on the second bearing surface.

[0008] Further, the number of light-emitting elements on the first bearing surface is equal to the number of light-emitting elements on the second bearing surface;

[0009] or the number of light-emitting elements on the first bearing surface is more than the number of light-emitting elements on the second bearing surface;

[0010] or the number of light-emitting elements on the first bearing surface is less than the number of light-emitting elements on the second bearing surface.

[0011] Further, the light-emitting elements on the first bearing surface and the light-emitting elements on the second bearing surface are arranged in a staggered manner.

[0012] Further, the plurality of light-emitting elements on the first bearing surface are evenly arranged, and the plurality of light-emitting elements on the second bearing surface are evenly arranged.

[0013] Further, a first light-shielding member is provided on the first bearing surface, the first light-shielding member is arranged between adjacent light-emitting elements on the first bearing surface, a second light-shielding member is provided on the second bearing surface, and the second light-shielding member is arranged between adjacent light-emitting elements on the second bearing surface.

[0014] Further, both the first light-shielding member and the second light-shielding member are light-shielding foam.

[0015] Further, a light crosstalk prevention encapsulation member is provided on the light-emitting element, the light crosstalk prevention encapsulation member wraps the light-emitting element, and there is a gap between the light crosstalk prevention encapsulation member and the light-emitting element.

[0016] Further, the light crosstalk prevention encapsulation member includes a transparent encapsulation glue layer and a light crosstalk prevention block, the transparent encapsulation glue layer wraps the light-emitting element, and the light crosstalk prevention block is embedded on the transparent encapsulation glue layer.

[0017] Implementing the present application has the following beneficial effects:

[0018] By providing light-emitting elements on both the first bearing surface and the second bearing surface that are oppositely arranged in the printed circuit board body, the present application can use the printed circuit board body to physically isolate the light-emitting elements on the first bearing surface from the light-emitting elements on the second bearing surface, thereby ensuring that crosstalk between adjacent light-emitting elements can be avoided within a limited space. Description of the Drawings

[0019] To more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 A top view structural schematic diagram of a light leakage prevention printed circuit board provided by an embodiment of the present application;

[0021] Figure 2 Another top view structural schematic diagram of a light leakage prevention printed circuit board provided by an embodiment of the present application;

[0022] Among them, the reference numerals in the figure correspond to: 1 - printed circuit board body; 11 - first bearing surface; 12 - second bearing surface; 2 - light emitting element; 3 - first light shielding member; 4 - second light shielding member. Detailed implementation manners

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0024] It should be noted that in the present application, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0025] Hereinafter, the embodiments will be described with reference to the drawings, and the drawings do not limit the disclosed content recorded in the claims in any way.

[0026] Please refer to Figure 1 and Figure 2 below, and a light leakage prevention printed circuit board provided by an embodiment of the present application will be described in detail with reference to Figure 1 and Figure 2 A light leakage prevention printed circuit board provided by an embodiment of the present application will be described in detail.

[0027] An embodiment of the present application provides a light leakage prevention printed circuit board, as shown in Figure 1 and Figure 2As shown, specifically, the printed circuit board for preventing light crosstalk includes a printed circuit board body 1 and a plurality of light-emitting components 2 disposed on the printed circuit board body 1.

[0028] Among them, the printed circuit board body 1 includes a first bearing surface 11 and a second bearing surface 12. The first bearing surface 11 and the second bearing surface 12 are disposed opposite to each other. A plurality of light-emitting components 2 are provided on the first bearing surface 11, and the adjacent light-emitting components 2 on the first bearing surface 11 are spaced apart. A plurality of light-emitting components 2 are provided on the second bearing surface 12, and the adjacent light-emitting components 2 on the second bearing surface 12 are spaced apart. The printed circuit board body 1 is used to physically isolate the plurality of light-emitting components 2 on the first bearing surface 11 from the plurality of light-emitting components 2 on the second bearing surface 12.

[0029] In the embodiment of the present application, the first bearing surface 11 and the second bearing surface 12 are respectively disposed on both sides of the printed circuit board body 1. Furthermore, by disposing the light-emitting components 2 on the first bearing surface 11 and the second bearing surface 12 on both sides of the printed circuit board body 1, the printed circuit board body 1 can be used to physically isolate the light-emitting components 2 on the first bearing surface 11 from the light-emitting components 2 on the second bearing surface 12, so as to ensure that in a limited space, the situation of light crosstalk between adjacent light-emitting components 2 can be avoided.

[0030] It should be noted that as Figure 1 shown, there will be no light crosstalk phenomenon between the adjacent light-emitting components 2 on the first bearing surface 11. This is mainly because the interval length between the adjacent light-emitting components 2 on the first bearing surface 11 belongs to the critical interval length for the light crosstalk phenomenon of the adjacent light-emitting components 2. It can be understood that if the interval length between the adjacent light-emitting components 2 on the first bearing surface 11 is less than the current interval length, then the light crosstalk phenomenon will occur. Furthermore, by setting according to the interval length between the adjacent light-emitting components 2 on the first bearing surface 11, the light crosstalk phenomenon between the adjacent light-emitting components 2 can be avoided. Further, there will be no light crosstalk phenomenon between the adjacent light-emitting components 2 on the second bearing surface 12. This is mainly because the interval length between the adjacent light-emitting components 2 on the second bearing surface 12 belongs to the critical interval length for the light crosstalk phenomenon of the adjacent light-emitting components 2. It can be understood that if the interval length between the adjacent light-emitting components 2 on the second bearing surface 12 is less than the current interval length, then the light crosstalk phenomenon will occur. Furthermore, by setting according to the interval length between the adjacent light-emitting components 2 on the second bearing surface 12, the light crosstalk phenomenon between the adjacent light-emitting components 2 can be avoided.

[0031] In a specific embodiment, as Figure 1As shown, although the distance between the projections of the light-emitting elements 2 near one end of the printed circuit board body 1 on the first bearing surface 11 on the printed circuit board body 1 is less than the distance between adjacent light-emitting elements 2 on the first bearing surface 11, there will be no light crosstalk between the light-emitting elements 2 near one end of the printed circuit board body 1 on the first bearing surface 11 and the light-emitting elements 2 near one end of the printed circuit board body 1 on the second bearing surface 12. This is mainly because the printed circuit board body 1 can physically isolate the light between the light-emitting elements 2 near one end of the printed circuit board body 1 on the first bearing surface 11 and the light-emitting elements 2 near one end of the printed circuit board body 1 on the second bearing surface 12, thereby avoiding light crosstalk between adjacent upper and lower light-emitting elements 2.

[0032] It should be noted that the end of the first bearing surface 11 near the printed circuit board body 1 and the end of the second bearing surface 12 near the printed circuit board body 1 belong to the same end of the printed circuit board body 1.

[0033] Furthermore, when the lengths of the printed circuit board bodies 1 are equal and the numbers of the light-emitting elements 2 on the printed circuit board bodies 1 are also equal, by welding the light-emitting elements 2 in the structure as Figure 1 shown, compared with welding the light-emitting elements 2 on one side of the printed circuit board body 1, it can prevent light crosstalk between adjacent light-emitting elements 2 while reducing the length of the printed circuit board body 1 by half, thereby saving the utilization space of the printed circuit board body 1.

[0034] In actual applications, the light-emitting element 2 can be an LED lamp.

[0035] In an alternative embodiment, as Figure 1 shown, the interval length between adjacent light-emitting elements 2 on the first bearing surface 11 is equal to the interval length between adjacent light-emitting elements 2 on the second bearing surface 12.

[0036] Specifically, by setting the interval length between adjacent light-emitting elements 2 on the first bearing surface 11 to be equal to the interval length between adjacent light-emitting elements 2 on the second bearing surface 12, on the premise of avoiding light crosstalk between the light-emitting elements 2, the purpose of ensuring uniform light emission of the printed circuit board can be achieved.

[0037] In an alternative embodiment, the interval length between adjacent light-emitting elements 2 on the first bearing surface 11 is greater than the interval length between the projections of adjacent light-emitting elements 2 among the projections of the light-emitting elements 2 on the first bearing surface 11 on the printed circuit board body 1 and the projections of the light-emitting elements 2 on the second bearing surface 12 on the printed circuit board body 1.

[0038] In the embodiment of the present application, the interval length between the projections of the light-emitting elements 2 on the first bearing surface 11 on the printed circuit board body 1 and the adjacent light-emitting elements 2 in the projections of the light-emitting elements 2 on the second bearing surface 12 on the printed circuit board body 1 is equal to half of the interval length between the adjacent light-emitting elements 2 on the first bearing surface 11. That is to say, except for the light-emitting elements 2 near the end points of the printed circuit board body 1 on the first bearing surface 11, the remaining light-emitting elements 2 are all arranged on the opposite surface at half of the interval length between the adjacent light-emitting elements 2 on the second bearing surface 12. It can also be said that except for the light-emitting elements 2 near the end points of the printed circuit board body 1 on the second bearing surface 12, the remaining light-emitting elements 2 are all arranged on the opposite surface at half of the interval length between the adjacent light-emitting elements 2 on the first bearing surface 11. Furthermore, by setting the interval length between the projections of the light-emitting elements 2 on the first bearing surface 11 on the printed circuit board body 1 and the adjacent light-emitting elements 2 in the projections of the light-emitting elements 2 on the second bearing surface 12 on the printed circuit board body 1 to be equal to half of the interval length between the adjacent light-emitting elements 2 on the first bearing surface 11, it is possible to avoid light crosstalk between adjacent light-emitting elements 2 within a limited space.

[0039] In an alternative embodiment, the number of light-emitting elements 2 on the first bearing surface 11 is equal to the number of light-emitting elements 2 on the second bearing surface 12; or the number of light-emitting elements 2 on the first bearing surface 11 is more than the number of light-emitting elements 2 on the second bearing surface 12; or the number of light-emitting elements 2 on the first bearing surface 11 is less than the number of light-emitting elements 2 on the second bearing surface 12.

[0040] Specifically, as Figure 1 shown, the number of light-emitting elements 2 on the first bearing surface 11 is more than the number of light-emitting elements 2 on the second bearing surface 12. As Figure 2 shown, the number of light-emitting elements 2 on the first bearing surface 11 is equal to the number of light-emitting elements 2 on the second bearing surface 12. Furthermore, the number of light-emitting elements 2 on the first bearing surface 11 and the number of light-emitting elements 2 on the second bearing surface 12 can be set according to actual situations and are not limited herein.

[0041] In an alternative embodiment, the light-emitting elements 2 on the first bearing surface 11 and the light-emitting elements 2 on the second bearing surface 12 are arranged in a staggered manner.

[0042] Specifically, by arranging the light-emitting elements 2 on the first bearing surface 11 and the light-emitting elements 2 on the second bearing surface 12 in a staggered manner, it is ensured that within a limited space, light crosstalk between adjacent light-emitting elements 2 is avoided.

[0043] In an alternative embodiment, the multiple light-emitting elements 2 on the first bearing surface 11 are evenly arranged, and the multiple light-emitting elements 2 on the second bearing surface 12 are evenly arranged.

[0044] Specifically, by evenly arranging multiple light-emitting components 2 on the first bearing surface 11 and evenly arranging multiple light-emitting components 2 on the second bearing surface 12, it is ensured that the printed circuit board can achieve the purpose of uniform light emission.

[0045] In an optional embodiment, as Figure 2 shown, a first light-shielding member 3 is provided on the first bearing surface 11, and the first light-shielding member 3 is arranged between adjacent light-emitting components 2 on the first bearing surface 11. A second light-shielding member 4 is provided on the second bearing surface 12, and the second light-shielding member 4 is arranged between adjacent light-emitting components 2 on the second bearing surface 12.

[0046] In the embodiment of the present application, by providing a first light-shielding member 3 on the first bearing surface 11 and a second light-shielding member on the second bearing surface 12, the first light-shielding member 3 is used to prevent light crosstalk between adjacent light-emitting components 2 on the first bearing surface 11, and the second light-shielding member is used to prevent light crosstalk between adjacent light-emitting components 2 on the second bearing surface 12.

[0047] It should be noted that, compared with the case where there is no first light-shielding member 3 between adjacent light-emitting components 2 on the first bearing surface 11, the interval length between adjacent light-emitting components 2 on the first bearing surface 11 provided with the first light-shielding member 3 is greater than the interval length between adjacent light-emitting components 2 on the first bearing surface 11 without the first light-shielding member 3. Furthermore, by providing the first light-shielding member 3 between adjacent light-emitting components 2 on the first bearing surface 11, the interval length between adjacent light-emitting components 2 on the first bearing surface 11 can be shortened, and thus the light-emitting indication ability on the first bearing surface 11 can be improved. Similarly, compared with the case where there is no second light-shielding member 4 between adjacent light-emitting components 2 on the second bearing surface 12, the interval length between adjacent light-emitting components 2 on the second bearing surface 12 provided with the second light-shielding member 4 is greater than the interval length between adjacent light-emitting components 2 on the second bearing surface 12 without the second light-shielding member 4. Furthermore, by providing the second light-shielding member 4 between adjacent light-emitting components 2 on the second bearing surface 12, the interval length between adjacent light-emitting components 2 on the second bearing surface 12 can be shortened, and thus the light-emitting indication ability on the second bearing surface 12 can be improved.

[0048] In a specific embodiment, both the first light-shielding member 3 and the second light-shielding member 4 are light-shielding foam.

[0049] Among them, the light-shielding foam is a light-shielding material used to prevent light from passing through or reflecting. It is usually black or dark in color and has a certain elasticity. Thus, by pressing the light-shielding foam, it can be filled in the fixed structure between adjacent light-emitting components 2, and thus the phenomenon of light crosstalk between adjacent light-emitting components 2 can be avoided.

[0050] In an alternative embodiment, a light leakage prevention encapsulation member is provided on the light emitting member 2. The light leakage prevention encapsulation member wraps the light emitting member 2, and there is a gap between the light leakage prevention encapsulation member and the light emitting member 2.

[0051] In the embodiment of the present application, a light leakage prevention encapsulation member (not shown in the figure) is provided on the light emitting member 2 to avoid light leakage between adjacent light emitting members 2 by using the light leakage prevention encapsulation member.

[0052] In a specific embodiment, the light leakage prevention encapsulation member includes a transparent encapsulation glue layer and a light leakage prevention block. The transparent encapsulation glue layer wraps the light emitting member 2, and the light leakage prevention block is embedded in the transparent encapsulation glue layer.

[0053] Specifically, the transparent encapsulation glue layer is an encapsulation glue layer with a light leakage prevention function, which can be formed by mixing silicone resin, phosphor, inorganic transparent powder, and tackifier in proportion. The light leakage prevention block is embedded in a groove on the surface of the transparent encapsulation glue layer, which is mainly made of epoxy resin and contains a certain amount of melanin in its formulation. Furthermore, by providing a light leakage prevention encapsulation member including a transparent encapsulation glue layer and a light leakage prevention block on the light emitting member 2, the light leakage between adjacent light emitting members 2 can be effectively avoided.

[0054] The above embodiments of the present application have the following beneficial effects:

[0055] In the present application, light emitting members are provided on both the first bearing surface and the second bearing surface oppositely arranged in the printed circuit board body, so as to physically isolate the light emitting members on the first bearing surface from the light emitting members on the second bearing surface by using the printed circuit board body, and further ensure that light leakage between adjacent light emitting members can be avoided in a limited space.

[0056] The structure shown in this embodiment is only a part of the structure related to the solution of the present application, and does not constitute a limitation on the device to which the solution of the present application is applied. The specific device may include more or fewer components than those shown, or combine some components, or have a different arrangement of components. It should be understood that the methods, devices, etc. disclosed in this embodiment can be implemented in other ways.

[0057] The above is only the specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present application, and all of them should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A printed circuit board for preventing cross-talk, characterized in that: It comprises a printed circuit board body (1) and a plurality of light-emitting elements (2) arranged on the printed circuit board body (1); The printed circuit board body (1) comprises a first bearing surface (11) and a second bearing surface (12); the first bearing surface (11) and the second bearing surface (12) are arranged opposite to each other; a plurality of the light-emitting components (2) are arranged on the first bearing surface (11); adjacent light-emitting components (2) on the first bearing surface (11) are arranged at intervals; a plurality of the light-emitting components (2) are arranged on the second bearing surface (12); adjacent light-emitting components (2) on the second bearing surface (12) are arranged at intervals; and the printed circuit board body (1) is used to physically isolate the plurality of the light-emitting components (2) on the first bearing surface (11) from the plurality of the light-emitting components (2) on the second bearing surface (12).

2. The printed circuit board according to claim 1, characterized in that: The spacing length between adjacent light-emitting components (2) on the first bearing surface (11) is equal to the spacing length between adjacent light-emitting components (2) on the second bearing surface (12).

3. The printed circuit board according to claim 1, characterized in that: The spacing length between adjacent light-emitting components (2) on the first bearing surface (11) is greater than the spacing length between adjacent projections of the light-emitting components (2) on the first bearing surface (11) on the printed circuit board body (1) and the projection of the light-emitting components (2) on the second bearing surface (12) on the printed circuit board body (1).

4. The printed circuit board according to claim 1, characterized in that: The number of the light-emitting components (2) on the first bearing surface (11) is equal to the number of the light-emitting components (2) on the second bearing surface (12); or the number of light-emitting components (2) on the first bearing surface (11) is greater than the number of light-emitting components (2) on the second bearing surface (12); Or the number of light-emitting components (2) on the first bearing surface (11) is less than the number of light-emitting components (2) on the second bearing surface (12).

5. The printed circuit board according to claim 1, characterized in that: The light-emitting components (2) on the first bearing surface (11) and the light-emitting components (2) on the second bearing surface (12) are arranged alternately.

6. The printed circuit board according to claim 1, characterized in that: The multiple light-emitting components (2) on the first bearing surface (11) are evenly arranged, and the multiple light-emitting components (2) on the second bearing surface (12) are evenly arranged.

7. The printed circuit board according to claim 1, characterized in that: A first shading member (3) is provided on the first bearing surface (11), and the first shading member (3) is arranged between adjacent light-emitting members (2) on the first bearing surface (11); a second shading member (4) is provided on the second bearing surface (12), and the second shading member (4) is arranged between adjacent light-emitting members (2) on the second bearing surface (12).

8. The printed circuit board according to claim 7, characterized in that: The first light shielding member (3) and the second light shielding member (4) are both light shielding foam.

9. The printed circuit board according to claim 1, characterized in that: An anti-cross-light package is provided on the light-emitting element (2), the anti-cross-light package wraps the light-emitting element (2), and a gap exists between the anti-cross-light package and the light-emitting element (2).

10. The printed circuit board according to claim 9, characterized in that: The anti-cross-light encapsulation component comprises a transparent encapsulation adhesive layer and an anti-cross-light block, wherein the transparent encapsulation adhesive layer wraps the light-emitting component (2), and the anti-cross-light block is embedded in the transparent encapsulation adhesive layer.

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