Multicolor light source device

Abstract

The utility model relates to the technical field of semiconductor luminescence, and discloses a multicolor light source device. The multicolor light source device comprises a bracket, a luminous chip, a light-transmitting glue layer and a fluorescent glue layer, the light-emitting chip is arranged on the support and at least comprises a first light-emitting chip. The light-transmitting glue layer at least covers the upper surface of the first light-emitting chip and comprises a first optical interface used for reflecting light rays and a second optical interface used for outputting the light rays. The fluorescent glue layer is arranged on the support, surrounds the periphery of the light-transmitting glue layer and the periphery of the first light-emitting chip and at least covers part of the first optical interface. A blocking structure used for preventing the fluorescent glue layer from covering the second optical interface is further arranged between the first optical interface and the second optical interface. The barrier structure has the effect of a retaining wall, so that the fluorescent glue layer cannot cover the second optical interface, the product height is greatly reduced, the assembly of a customer is facilitated, and the light extraction efficiency is still high when the product height is low.

Description

Technical Field

[0001] The utility model belongs to the technical field of semiconductor lighting, and specifically relates to a multi-color light source device. Background Art

[0002] A multi-color light source usually needs to integrate multiple light-emitting chips with different light-emitting colors. Because of the different types of light-emitting chips, some light-emitting chips need to change the light-emitting color through the action of a phosphor glue layer, while some light-emitting chips do not. Prior art one: The setting method of a single light-emitting chip: Refer to Figure 5 , the first light-emitting chip 21 is fixed on the bracket 1, the upper surface of the first light-emitting chip 21 is covered with a light-transmitting glue layer 3, and the light-transmitting glue layer 3 includes a first optical interface 31 for reflection and a second optical interface 32 for outputting light. The periphery of the first light-emitting chip 21 and the light-transmitting glue layer 3 is covered with a high-reflection glue layer 5. The high-reflection glue layer 5 covers the first optical interface 31.

[0003] Prior art two is an improvement on prior art one. Refer to Figures 6-7 , at least one second light-emitting chip 22 is arranged around the light-transmitting glue layer 3 and the first light-emitting chip 21, and the high-reflection glue layer 5 is replaced with a fluorescent glue layer 4 to change the light-emitting color of the second light-emitting chip 22. However, the existing problem is that since the fluorescent glue layer 4 needs to completely cover the second light-emitting chip 22, the height of the fluorescent glue layer 4 in prior art two is higher than that of the high-reflection glue layer 5. If the heights of the first optical interface 31 and the second optical interface 32 are not increased, the fluorescent glue layer 4 will inevitably extend from the first optical interface 31 to the second optical interface 32, thus affecting the light-emitting effect of the first light-emitting chip 21.

[0004] The fluorescent glue layer 4 needs to cover the first optical interface 31 but not the second optical interface 32. In order not to affect the light-emitting effect of the second optical interface 32, the fluorescent glue layer 4 does not extend to the second optical interface 32, and the height of the first optical interface 31 is set to be not lower than the bowl height of the bracket 1. Thus, limited by the bowl height of the bracket 1, prior art two compared with prior art one: 1. The height of the entire light source device increases and the size becomes larger; 2. Since the light extraction rate of a convex curved surface is higher than that of a plane, the second optical interface 32 is preferably set as a convex curved surface, and the second optical interface 32 is higher than the bracket 1, which is not conducive to assembly and has poor matching.

[0005] Based on the above, the problem to be solved currently is: to provide a multi-color light source device with high light energy utilization rate, small size and high adaptability. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a multi-color light source device, aiming to solve the problems of large product size, low light efficiency and poor adaptability in the prior art.

[0007] The present utility model is implemented as follows. A multi-color light source device includes:

[0008] a bracket;

[0009] a light-emitting chip, which is disposed on the bracket, and the light-emitting chip at least includes a first light-emitting chip;

[0010] a light-transmitting glue layer, which at least covers the upper surface of the first light-emitting chip; the light-transmitting glue layer sequentially includes a first optical interface for reflecting light on the side surface and a second optical interface for outputting light on the top surface in the direction from the first light-emitting chip to the light-transmitting glue layer;

[0011] a fluorescent glue layer, which is disposed on the bracket and surrounds the light-transmitting glue layer and the first light-emitting chip; the fluorescent glue layer at least covers part of the first optical interface;

[0012] A barrier structure is further provided between the first optical interface and the second optical interface to prevent the fluorescent glue layer from covering the second optical interface.

[0013] Further, the barrier structure is set as one or more optical interfaces connected to the first optical interface and the second optical interface.

[0014] Further, the barrier structure is set as a horizontal plane or a vertical plane or a cylindrical curved surface connected to the first optical interface and the second optical interface.

[0015] Further, the barrier structure includes two optical interfaces at a certain angle, and the cross-section of the barrier structure is an outwardly convex apex structure.

[0016] Further, the height of the barrier structure is lower than the height of the bracket.

[0017] Further, the first optical interface is an inverted conical reflecting surface.

[0018] Further, the second optical interface is a plane or a free-form surface.

[0019] Further, the height of the first optical interface is less than the height of the bracket.

[0020] Further, the height of the fluorescent glue layer is less than or equal to the height of the light-transmitting glue layer.

[0021] Further, the light-emitting chip further includes a second light-emitting chip, the second light-emitting chip is disposed inside the fluorescent glue layer and around the first light-emitting chip, and the fluorescent glue layer covers the upper surface and the side surface of the second light-emitting chip.

[0022] Compared with the prior art, a multi-color light source device provided by the present utility model has the following beneficial effects:

[0023] A barrier structure 33 is added to the light-transmitting glue layer 3 of the present utility model. The barrier structure 33 is one or more optical interfaces connecting the first optical interface 31 and the second optical interface 32. The barrier structure 33 functions as a retaining wall. By utilizing the surface tension of the fluorescent glue layer 4 on the surface of the barrier structure 33, the fluorescent glue layer 4 covers the first optical interface 31 and the barrier structure 33, but does not cover the second optical interface 32, thus not affecting the light extraction effect of the second optical interface 32.

[0024] Due to the existence of the barrier structure 33, the second optical interface 32 is not restricted by the height of the bowl of the bracket 1. The lowest point of the second optical interface 32 can be lower than the highest point of the bracket 1, and even the highest point of the second optical interface 32 can be lower than the highest point of the bracket 1, greatly reducing the product height, which is more conducive to customer assembly. By controlling the heights of the light-transmitting glue layer 3 and the fluorescent glue layer 4 using a mold, the degree of freedom and personalization of the product are higher.

[0025] The first optical interface 31 of the present utility model reflects the large-angle light emitted by the first light-emitting chip 21 towards the direction close to the optical axis, making full use of the large-angle light at the edge and improving the light energy utilization rate. The convex curved surface of the second optical interface 32 has a high light extraction rate. The first optical interface 31, the second optical interface 32, and the barrier structure 33 ensure that the present utility model still has a high light extraction efficiency at a low product height. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic cross-sectional structure diagram of the multi-color light source device provided by the present utility model;

[0027] Figure 2 is a schematic cross-sectional structure diagram of the multi-color light source device according to Embodiment 1 provided by the present utility model;

[0028] Figure 3 is a schematic cross-sectional structure diagram of the multi-color light source device according to Embodiment 2 provided by the present utility model;

[0029] Figure 4 is a schematic cross-sectional structure diagram of the multi-color light source device according to Embodiment 3 provided by the present utility model;

[0030] Figure 5 is a schematic cross-sectional structure diagram of the multi-color light source device provided by the prior art 1;

[0031] Figure 6 is a schematic cross-sectional structure diagram of the multi-color light source device provided by the prior art 2;

[0032] Figure 7 is a top view of the multi-color light source device provided by the prior art 2;

[0033] In the figure: 1 - bracket; 21 - first light-emitting chip; 22 - second light-emitting chip; 3 - light-transmitting glue layer; 31 - first optical interface; 32 - second optical interface; 33 - barrier structure; 4 - fluorescent glue layer; 5 - high-reflection glue layer. Specific embodiments

[0034] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0035] The implementation of the present utility model will be described in detail below with reference to specific embodiments.

[0036] In the drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present utility model 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. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0037] Refer to Figures 1-4 As shown, it is a preferred embodiment provided by the present utility model.

[0038] The multi-color light source device of the present utility model includes a bracket 1, a light-emitting chip, a light-transmitting glue layer 3 and a fluorescent glue layer 4. Refer to Figure 1 . The light-emitting chip is arranged on the bracket 1. The light-emitting chip at least includes a first light-emitting chip 21. According to needs, 2 or more light-emitting chips can also be provided. According to different application scenarios, the light-emitting colors of multiple light-emitting chips can be the same or different, realizing multi-color light emission of the light source device. Through the control circuit, the light-emitting chips of different colors can emit light simultaneously or separately.

[0039] The light-transmitting glue layer 3 at least covers the upper surface of the first light-emitting chip 21. In the direction from the first light-emitting chip 21 to the light-transmitting glue layer 3 (from bottom to top), the light-transmitting glue layer 3 sequentially includes a first optical interface 31, a barrier structure 33 and a second optical interface 32.

[0040] The first optical interface 31 is set as a reflecting surface. The first optical interface 31 is used to reflect the edge large-angle light emitted by the first light-emitting chip 21. The first optical interface 31 is preferably an inverted conical reflecting surface, that is, the first optical interface 31 is set as an inclined plane or curved surface that gradually moves away from the optical axis in the direction from the first light-emitting chip 21 to the light-transmitting adhesive layer 3. The edge large-angle light emitted by the first light-emitting chip 21 is incident on the first optical interface 31 and undergoes total internal reflection and propagates in the direction close to the optical axis, making full use of the edge large-angle light and improving the light energy utilization rate. The second optical interface 32 is a plane or a free-form surface, preferably a convex curved surface with a certain converging effect.

[0041] The barrier structure 33 is set as one or more optical interfaces connected to the first optical interface 31 and the second optical interface 32, and its main function is to increase the function of the retaining wall. The barrier structure 33 can be set as a horizontal plane (a plane approximately perpendicular to the optical axis of the first light-emitting chip 21) or a vertical plane (a plane approximately parallel to the optical axis of the first light-emitting chip 21) or a cylindrical curved surface connected to the first optical interface 31 and the second optical interface 32; it can also be set as including two optical interfaces at a certain angle, and the cross-section of the barrier structure 33 is an outwardly convex vertex structure. The barrier structure 33 is not limited to the above structures. The fluorescent adhesive layer 4 is provided on the bracket 1 and surrounds the light-transmitting adhesive layer 3 and the first light-emitting chip 21. The fluorescent adhesive layer 4 covers the first optical interface 31 and the barrier structure 32. The barrier structure 33 can prevent the fluorescent adhesive layer 4 from spreading to the second optical interface 32 at the top by using the surface tension of the fluorescent adhesive layer 4 on the surface of the barrier structure 33. Due to the existence of the barrier structure 33, the first optical interface 31 (reflecting surface) can be set shorter, and the second optical interface 32 can be set lower, that is, closer to the first light-emitting chip 21 than in the prior art. The second optical interface 32 is not limited by the height of the bowl of the bracket 1. The lowest point of the second optical interface 32 can be lower than the highest point of the bracket 1 (that is, the height of the barrier structure 33 is lower than the height of the bracket 1), and even the highest point of the second optical interface 32 can be lower than the highest point of the bracket 1, greatly reducing the product height, which is more conducive to customer assembly. By using a mold to control the height of the light-transmitting adhesive layer 3, personalized setting of the product height can be achieved. The utility model still has a high light extraction efficiency at a low product height.

[0042] At least a second light-emitting chip 22 is provided in the fluorescent adhesive layer 4. The fluorescent adhesive layer 4 covers the upper surface and the side surface of the second light-emitting chip 22 and is used to change the light-emitting color of the second light-emitting chip 22. Preferably, the refractive index of the light-transmitting adhesive layer 3 is greater than or equal to the refractive index of the fluorescent adhesive layer 4. Further ensuring that the light reaching the first optical interface 31 undergoes total internal reflection.

[0043] The utility model is applicable to a light source integrating multiple light-emitting chips. When the integrated light-emitting chips are similar to the first light-emitting chip 21 whose light-emitting color does not need to be converted, the setting method of covering a light-transmitting glue layer 3 on the first light-emitting chip 21 is adopted in the utility model. When the integrated light-emitting chips are similar to the second light-emitting chip 22 whose light-emitting color needs to be converted into other colors, the setting method of covering a fluorescent glue layer 4 on the second light-emitting chip 22 can be adopted. The bracket 1 is preferably a bowl-shaped bracket. The fluorescent glue layer 4 is filled inside the light-transmitting glue layer 3, around the first light-emitting chip 21, and on the inner side wall of the bowl of the bracket 1.

[0044] Preferred solution, referring to Figure 4 , the height of the first optical interface 31 (i.e., the height from the highest point of the first optical interface 31 to the bottom of the bracket 1) is L, the height of the bracket 1 (i.e., the height from the upper surface of the bracket 1 to the bottom of the bracket 1) is H, and L < H is satisfied. The height of the fluorescent glue layer 4 (the height from the highest point of the connection between the fluorescent glue layer 4 and the light-transmitting glue layer 3 to the bottom of the bracket 1) is W, and the height of the light-transmitting glue layer 3 (the height from the highest point of the light-transmitting glue layer 3 to the bottom of the bracket 1) is S. Preferably, W ≤ S is satisfied. The upper surface of the fluorescent glue layer 4 can be set as a plane or a curved surface. The above settings achieve the miniaturization of the entire multi-color light source device. Specific embodiments

[0046] Embodiment 1: The multi-color light source device includes a bracket 1, a light-emitting chip, a light-transmitting glue layer 3, and a fluorescent glue layer 4, referring to Figure 2 . The light-emitting chip is arranged on the bracket 1. The light-emitting chip at least includes a first light-emitting chip 21 and a second light-emitting chip 22. The light-transmitting glue layer 3 covers the upper surface of the first light-emitting chip 21. The light-transmitting glue layer 3 sequentially includes a first optical interface 31, a barrier structure 33, and a second optical interface 32. The fluorescent glue layer 4 is arranged on the bracket 1 and surrounds the light-transmitting glue layer 3 and the first light-emitting chip 21, and covers the upper surface and the side surface of the second light-emitting chip 22. The fluorescent glue layer 4 covers the first optical interface 31. The barrier structure 33 is a plane approximately perpendicular to the optical axis of the first light-emitting chip 21. [[ID=I]]

[0047] Embodiment 2: Referring to Figure 3 , the main difference from Embodiment 1 is that the barrier structure 33 includes two optical interfaces at a certain angle, and the angle is approximately 90°. The cross-section of the barrier structure 33 is an outwardly convex right-angled vertex structure. The fluorescent glue layer 4 covers the first optical interface 31 and part of the barrier structure 33. Other embodiments are the same as those in Embodiment 1.

[0048] Embodiment 3: Referring to Figure 4, the main differences from the first embodiment: the barrier structure 33 is a plane approximately parallel to the optical axis of the first light-emitting chip 21 or a cylindrical curved surface with a center line parallel to the optical axis of the first light-emitting chip 21. The fluorescent glue layer 4 covers the first optical interface 31 and the barrier structure 33. The height of the first optical interface 31 is L, and the height of the bracket 1 is H, satisfying L < H. The height of the fluorescent glue layer 4 is W, and the height of the light-transmitting glue layer 3 is S, satisfying W ≤ S. The above settings achieve the miniaturization of the entire multi-color light source device. Other embodiments are the same as the first embodiment.

[0049] It is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-color light source device, characterized in that, Comprising: a bracket (1); a light-emitting chip, which is disposed on the bracket (1), and the light-emitting chip at least includes a first light-emitting chip (21); a light-transmitting glue layer (3), which at least covers the upper surface of the first light-emitting chip (21); the light-transmitting glue layer (3) sequentially includes a first optical interface (31) for reflecting light on the side surface and a second optical interface (32) for outputting light on the top surface in the direction from the first light-emitting chip (21) to the light-transmitting glue layer (3); a fluorescent glue layer (4), which is disposed on the bracket (1) and surrounds the light-transmitting glue layer (3) and the first light-emitting chip (21); the fluorescent glue layer (4) at least covers a part of the first optical interface (31); a barrier structure (33) is further disposed between the first optical interface (31) and the second optical interface (32) to prevent the fluorescent glue layer (4) from covering the second optical interface (32).

2. The multi-color light source device according to claim 1, characterized in that, The barrier structure (33) is set as one or more optical interfaces connected to the first optical interface (31) and the second optical interface (32).

3. The multi-color light source device according to claim 2, characterized in that, The barrier structure (33) is set as a horizontal plane or a vertical plane or a cylindrical curved surface connected to the first optical interface (31) and the second optical interface (32).

4. The multi-color light source device according to claim 2, wherein The barrier structure (33) includes two optical interfaces at a certain angle, and the cross section of the barrier structure (33) is an outwardly convex apex structure.

5. The multi-color light source device according to claim 1, wherein The height of the barrier structure (33) is lower than the height of the bracket (1).

6. The multi-color light source device according to claim 1, wherein The first optical interface (31) is an inverted conical reflecting surface.

7. The multi-color light source device according to claim 1, wherein, The second optical interface (32) is a plane or a free-form surface.

8. The multi-color light source device according to claim 1, characterized in that, The height of the first optical interface (31) is less than the height of the bracket (1).

9. The multi-color light source device according to claim 1, wherein The height of the fluorescent glue layer (4) is less than or equal to the height of the light-transmitting glue layer (3).

10. The multi-color light source device according to any one of claims 1-9, characterized in that, The light-emitting chip further includes a second light-emitting chip (22), the second light-emitting chip (22) is disposed inside the fluorescent glue layer (4) and around the first light-emitting chip (21), and the fluorescent glue layer (4) covers the upper surface and the side surface of the second light-emitting chip (22).

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