Multicolor COB light source and lamp
By using a low-refractive-index, high-transmittance low-refractive-index, high-transmittance layer in conjunction with a dam to encapsulate the light-emitting module in a multi-color COB light source, the problem of low blue light purity is solved, and the authenticity of blue light color is improved.
Patent Information
- Application Number
- CN202423300975.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-27
AI Technical Summary
The blue light purity of existing multicolor COB light sources is relatively low, mainly because the blue light excites the phosphors on the warm and white light-emitting modules under the refraction of the encapsulating adhesive, resulting in a decrease in color purity.
The light-emitting area is covered with a low-refractive-index, high-transmittance layer, and in conjunction with a dam, the light-emitting module is encapsulated in a hollow cavity to prevent blue light from being refracted before emission and to reduce the excitation of phosphors.
The color purity of blue light has been improved, ensuring that the blue light color is more realistic and the overall light color effect is enhanced.
Smart Images
Figure CN223694248U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to LED packaging technical field especially, and relates to a kind of multicolor COB light source and lamps and lanterns. BACKGROUND
[0002] COB (chip on board, chip packaging on board) is that bare chip is adhered on interconnection substrate using conductive or non-conductive glue, and then wire bonding is carried out to realize its electrical connection. Four-color, five-color or other multicolor COB light source is composed of multiple light emitting modules.
[0003] The existing multicolor COB light source has the problem of low blue light purity. UTILITY MODEL CONTENT
[0004] In order to solve the problems in the prior art, one of the purposes of the utility model is to provide a multicolor COB light source.
[0005] The utility model provides the following technical solutions:
[0006] A multicolor COB light source comprises:
[0007] A substrate has a light emitting area;
[0008] Multiple light emitting modules are arranged on the substrate and located in the light emitting area, and the multiple light emitting modules comprise a blue light emitting module and at least one of a warm light emitting module and a white light emitting module;
[0009] A dam is arranged on the substrate and distributed around the light emitting area; and
[0010] A low-refractive high-transparency layer is arranged on the dam and covers the light emitting area.
[0011] As a further optional solution to the multicolor COB light source, the substrate, the dam and the low-refractive high-transparency layer form a hollow chamber, and the height of the hollow chamber is greater than the height of the multiple light emitting modules.
[0012] As a further optional solution to the multicolor COB light source, the hollow chamber is in a vacuum state.
[0013] As a further optional solution to the multicolor COB light source, the dam comprises a first dam adhesive layer and a second dam adhesive layer, the second dam adhesive layer is located on the side of the first dam adhesive layer away from the substrate, and the hardness of the second dam adhesive layer is less than the hardness of the first dam adhesive layer.
[0014] As a further optional solution to the multi-color COB light source, the height of the hollow chamber is H1, the height of the plurality of light emitting modules is H2, and H1-H2≥0.2mm.
[0015] As a further optional solution to the multi-color COB light source, the height of the hollow chamber is H1, the height of the plurality of light emitting modules is H2, and H1-H2≤0.3mm.
[0016] As a further optional solution to the multi-color COB light source, the thickness of the low-refractive high-transparency layer is H3, and H3≥0.3mm.
[0017] As a further optional solution to the multi-color COB light source, the thickness of the low-refrative high-transparency layer is H3, and H3≤1mm.
[0018] As a further optional solution to the multi-color COB light source, the low-refrative high-transparency layer is a glass layer.
[0019] Another object of the present application is to provide a lamp.
[0020] The present application provides the following technical solutions:
[0021] A lamp comprises the multi-color COB light source.
[0022] The embodiments of the present application have the following beneficial effects:
[0023] In the multi-color COB light source, the low-refrative high-transparency layer cooperates with the dam to encapsulate the plurality of light emitting modules in the light emitting region. When the blue light emitted by the blue light emitting module is irradiated on the low-refrative high-transparency layer, the low-refrative high-transparency layer has low refractive index and high light transmittance, so that the blue light can not be refracted or be refracted to a small extent before reaching the light emitting surface, thereby reducing the excitation effect of the blue light on the fluorescent powder attached to the warm light emitting module or the white light emitting module, and improving the color purity of the blue light.
[0024] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS
[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.
[0026] Figure 1A structural schematic diagram of an existing multi-color COB light source is shown.
[0027] Figure 2 A structural schematic diagram of an existing multi-color COB light source is shown.
[0028] Figure 3 A structural schematic diagram of an existing multi-color COB light source is shown. Figure 2 An enlarged schematic diagram at A in the middle is shown.
[0029] Figure 4 A structural schematic diagram of an existing multi-color COB light source is shown.
[0030] Main element symbol explanation:
[0031] 100 - substrate; 110 - light emitting area; 200 - light emitting module; 210 - blue light emitting module; 220 - warm light emitting module; 230 - white light emitting module; 240 - red light emitting module; 250 - green light emitting module; 300 - dam; 310 - first dam adhesive layer; 320 - second dam adhesive layer; 400 - low-refractive high-transparency layer; 500 - hollow chamber; 600 - encapsulation adhesive. DETAILED DESCRIPTION
[0032] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are intended to explain the present application, and cannot be understood as limiting the present application.
[0033] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. Conversely, when an element is referred to as being "directly on" another element, there is no intervening element. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only.
[0034] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.
[0035] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as implying or suggesting relative importance or an implied order of magnitude of the features being described. Thus, features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.
[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the template herein is only for the purpose of describing specific embodiments and is not intended to limit the present application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0037] Please refer to Figure 1 The present inventor has found that the blue light emitting module 210 of the existing multi-color COB light source will refract blue light due to the refractive index of the encapsulation glue 600 when emitting light. The refracted blue light will excite the phosphor attached to the warm light emitting module 220 and the phosphor attached to the white light emitting module 230, resulting in low blue light color purity and affecting the overall blue light color.
[0038] To solve the above problems, please refer to Figure 2 The present embodiment provides a multi-color COB light source, such as a four-color COB light source, a five-color COB light source, etc. The COB light source includes a substrate 100, a dam 300, a low-refraction high-transparency layer 400, and a plurality of light emitting modules 200.
[0039] The substrate 100 has a light emitting area 110.
[0040] Correspondingly, the plurality of light emitting modules 200 are arranged on the substrate 100 and located within the light emitting area 110. The plurality of light emitting modules 200 include a blue light emitting module 210, and at least one of a warm light emitting module 220 and a white light emitting module 230.
[0041] In addition, the dam 300 is arranged on the substrate 100 and distributed around the light emitting area 110. The low-refraction high-transparency layer 400 is arranged on the dam 300 and covers the light emitting area 110.
[0042] In the multi-color COB light source, the low-refractive high-transparency layer 400 cooperates with the dam 300 to encapsulate the plurality of light emitting modules 200 in the light emitting area 110. When the blue light emitted by the blue light emitting module 210 is irradiated on the low-refractive high-transparency layer 400, the low-refractive high-transparency layer 400 has low refractive index and high light transmittance, so that the blue light can be reduced or not refracted before reaching the light emitting surface, thereby reducing the excitation effect of the blue light on the phosphor attached on the warm light emitting module 220 or the white light emitting module 230, so as to improve the color purity of the blue light.
[0043] In some embodiments, the plurality of light emitting modules 200 simultaneously includes the warm light emitting module 220 and the white light emitting module 230.
[0044] Optionally, the plurality of light emitting modules 200 further includes a red light emitting module 240 and a green light emitting module 250.
[0045] In addition, the blue light emitting module 210, the warm light emitting module 220, the white light emitting module 230, the red light emitting module 240 and the green light emitting module 250 are all provided in plurality, and the plurality of blue light emitting modules 210, the plurality of warm light emitting modules 220, the plurality of white light emitting modules 230, the plurality of red light emitting modules 240 and the plurality of green light emitting modules 250 are staggered distributed in the light emitting area 110.
[0046] In some embodiments, the low-refractive high-transparency layer 400 is a glass layer.
[0047] Please refer to Figure 2 and Figure 3 , further, in some embodiments, the thickness of the low-refractive high-transparency layer 400 is H3, which satisfies H3≥0.3mm.
[0048] Unlike the existing multi-color COB light source, the encapsulation glue 600 is cured and attached on the substrate 100, in the multi-color COB light source, the low-refractive high-transparency layer 400 is arranged on the dam 300, and the middle part of the low-refractive high-transparency layer 400 is suspended, so that the low-refractive high-transparency layer 400 has certain requirements for strength. The smaller the thickness of the low-refractive high-transparency layer 400, the lower the strength, and the more prone to rupture after being stressed. Therefore, the thickness of the low-refractive high-transparency layer 400 is not less than 0.3mm, so as to ensure that the low-refractive high-transparency layer 400 has sufficient strength, thereby providing long-term and effective protection for the plurality of light emitting modules 200 in the light emitting area 110.
[0049] Further, in some embodiments, the thickness of the low-refractive high-transparency layer 400 is H3, and H3≤1mm.
[0050] The greater the thickness of the low-refractive high-transparency layer 400, the greater the thickness of the multi-color COB light source and the device made of the multi-color COB light source. Therefore, the thickness of the low-refractive high-transparency layer 400 is not greater than 1 mm, which can avoid the thickness of the multi-color COB light source being too large, and is conducive to controlling the size of the device made of the multi-color COB light source, and achieving miniaturization and light weight.
[0051] In this embodiment, the thickness of the low-refractive high-transparency layer 400 is 0.7 mm.
[0052] Further, in some embodiments, the substrate 100, the dam 300, and the low-refractive high-transparency layer 400 enclose a hollow chamber 500, and the height of the hollow chamber 500 is greater than the height of the plurality of light-emitting modules 200.
[0053] The height of the hollow chamber 500 specifically refers to the height of the hollow chamber 500 along the normal direction of the substrate 100, that is, the distance between the low-refractive high-transparency layer 400 and the substrate 100, and the height of the hollow chamber 500 is equal to the height of the dam 300. The height of the plurality of light-emitting modules 200 is the same, and is not described here.
[0054] It can be understood that the plurality of light-emitting modules 200 are all located inside the hollow chamber 500. Since the height of the hollow chamber 500 is greater than the height of the plurality of light-emitting modules 200, the plurality of light-emitting modules 200 on the substrate 100 do not contact the low-refractive high-transparency layer 400, and there is a certain gap between the plurality of light-emitting modules 200 and the low-refractive high-transparency layer 400, which avoids the low-refractive high-transparency layer 400 and the plurality of light-emitting modules 200 being damaged due to the low-refractive high-transparency layer 400 being pressed by the plurality of light-emitting modules 200 caused by installation errors during packaging.
[0055] Further, in some embodiments, the height of the hollow chamber 500 is H1, and the height of the plurality of light-emitting modules 200 is H2, and H1-H2≥0.2 mm is satisfied.
[0056] At this time, the gap width between the plurality of light-emitting modules 200 and the low-refractive high-transparency layer 400 is not less than 0.2 mm. Even if there is a certain installation error during packaging, the low-refractive high-transparency layer 400 is not easy to press the plurality of light-emitting modules 200.
[0057] Further, in some embodiments, the height of the hollow chamber 500 is H1, and the height of the plurality of light-emitting modules 200 is H2, and H1-H2≤0.3 mm is satisfied.
[0058] Similar to the low-refractive high-transparency layer 400, the greater the height of the hollow cavity 500, the greater the thickness of the multi-color COB light source, and the greater the thickness of the device made of the multi-color COB light source. Therefore, the height of the hollow cavity 500 is not greater than 0.3 mm, which can also avoid the thickness of the multi-color COB light source being too large, and is conducive to controlling the size of the device made of the multi-color COB light source, and achieving miniaturization and light weight.
[0059] For example, the height of the plurality of light emitting modules 200 is 0.2 mm. Correspondingly, the height of the hollow cavity 500 is 0.4-0.5 mm.
[0060] Further, in some embodiments, the hollow cavity 500 is in a vacuum state.
[0061] Specifically, during packaging, the dam 300 and the plurality of light emitting modules 200 are first arranged on the substrate 100, and then the low-refractive high-transparency layer 400 is arranged on the dam 300. At the same time, the space where the substrate 100, the dam 300, the low-refractive high-transparency layer 400 and the plurality of light emitting modules 200 are located is vacuumized, so that the hollow cavity 500 is in a vacuum state, until the dam 300 is cured and formed.
[0062] During use, due to the low air pressure inside the hollow cavity 500, there is a pressure difference between the inside and outside of the low-refractive high-transparency layer 400. Under the action of the pressure difference, the low-refractive high-transparency layer 400 is tightly pressed on the dam 300, which can enhance the sealing performance of the joint between the dam 300 and the low-refractive high-transparency layer 400, and better isolate the hollow cavity 500 from the external air.
[0063] Please refer to Figure 4 Further, in some embodiments, the dam 300 includes a first dam adhesive layer 310 and a second dam adhesive layer 320. The second dam adhesive layer 320 is located on the side of the first dam adhesive layer 310 away from the substrate 100, and the hardness of the second dam adhesive layer 320 is less than that of the first dam adhesive layer 310.
[0064] It can be understood that the first dam adhesive layer 310 adopts a conventional dam adhesive, which has a relatively hard texture after curing and forming. After the second dam adhesive layer 320 with a relatively soft texture is additionally arranged on the side of the first dam adhesive layer 310 away from the substrate 100, the low-refractive high-transparency layer 400 is tightly pressed on the second dam adhesive layer 320 under the action of the pressure difference, which can cause the second dam adhesive layer 320 to deform to a certain extent, thereby ensuring the close fit between the second dam adhesive layer 320 and the low-refractive high-transparency layer 400. At this time, the second dam adhesive layer 320 plays a role similar to that of a rubber sealing ring, which can further enhance the sealing performance of the joint between the dam 300 and the low-refractive high-transparency layer 400, and better isolate the hollow cavity 500 from the external air.
[0065] In summary, in the multi-color COB light source, the low-refractive high-transparency layer 400 cooperates with the dam 300 to encapsulate the multiple light emitting modules 200 in the light emitting area 110. When the blue light emitted by the blue light emitting module 210 is irradiated on the low-refractive high-transparency layer 400, the blue light can not be refracted or be refracted less before reaching the light emitting surface due to the low refractive index and high light transmittance of the low-refractive high-transparency layer 400, thereby reducing the excitation effect of the blue light on the phosphor attached on the warm light emitting module 220 and the white light emitting module 230, improving the color purity of the blue light, making the color of the blue light more real, and improving the overall color of the blue light.
[0066] The embodiment also provides a lamp, which comprises the multi-color COB light source.
[0067] In all examples shown and described herein, any specific values should be interpreted as merely exemplary and not as a limitation, and thus other examples of the exemplary embodiments can have different values.
[0068] It should be noted that like reference numerals and letters refer to like items throughout the several views, and once an item is defined in one view, it is not necessary to further define and explain it in the subsequent views.
[0069] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application.
Claims
1. A multicolor COB light source, characterized in that, include: The substrate has a light-emitting area; Multiple light-emitting modules are disposed on the substrate and located within the light-emitting area. The multiple light-emitting modules include a blue light-emitting module and at least one of a warm light-emitting module and a white light-emitting module. A dam, disposed on the substrate and distributed around the light-emitting area; and A low-reflection, high-transparency layer is disposed on the dam and covers the luminescent area.
2. The multicolor COB light source according to claim 1, characterized in that, The substrate, the surrounding dam, and the low-reflection, high-transparency layer enclose a hollow cavity, the height of which is greater than the height of the plurality of light-emitting modules.
3. The multicolor COB light source according to claim 2, characterized in that, The hollow chamber is in a vacuum state.
4. The multicolor COB light source according to claim 3, characterized in that, The dam includes a first dam adhesive layer and a second dam adhesive layer, the second dam adhesive layer being located on the side of the first dam adhesive layer away from the substrate, and the hardness of the second dam adhesive layer being less than the hardness of the first dam adhesive layer.
5. The multicolor COB light source according to claim 2, characterized in that, The height of the hollow cavity is H1, and the height of the plurality of light-emitting modules is H2, where H1-H2≥0.2mm.
6. The multicolor COB light source according to claim 2, characterized in that, The height of the hollow cavity is H1, and the height of the plurality of light-emitting modules is H2, where H1-H2≤0.3mm.
7. The multicolor COB light source according to any one of claims 1-6, characterized in that, The thickness of the low-reflection, high-transparency layer is H3, where H3 ≥ 0.3 mm.
8. The multicolor COB light source according to any one of claims 1-6, characterized in that, The thickness of the low-reflection, high-transparency layer is H3, where H3 ≤ 1 mm.
9. The multicolor COB light source according to any one of claims 1-6, characterized in that, The low-reflection, high-transparency layer is a glass layer.
10. A lamp, characterized in that, The multicolor COB light source includes any one of claims 1-9.