Multi-color light source device with partitioned light distribution

Abstract

The utility model relates to the technical field of semiconductor light emitting, and discloses a multicolor light source device with partitioned light distribution, which comprises a bracket, and a light emitting chip, a light-transmitting glue layer, a lens and an optical isolation cavity which are arranged on the bracket. The light-emitting chips at least comprise a first light-emitting chip and a second light-emitting chip. The light-transmitting glue layer covers the light-emitting chip. The lens covers the light-transmitting glue layer. The optical isolation cavity is of a cavity structure with the lens recessed inwards and is arranged between the first light-emitting chip and the second light-emitting chip. The optical isolation cavity at least divides the lens into a first optical function area and a second optical function area. The first optical function area and the second optical function area are arranged above the first light-emitting chip and the second light-emitting chip respectively. The optical isolation cavity divides the light source device into a plurality of optical function areas. Different optical design is respectively carried out on different optical functional areas to adapt to different light-emitting chips, zoning light control is carried out, the same light source device can emit light with multiple divergence angles, the light efficiency is high, and the structure is stable.

Description

Technical Field

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

[0002] A multi-color light source usually integrates multiple different light-emitting chips. Different light-emitting chips require different divergence angles, spot sizes, etc. due to different colors, functions, optical effects, etc. The prior art refers to Figures 9-10 , at least two light-emitting chips 2 (the first light-emitting chip 21 and the second light-emitting chip 22) are arranged in the bracket 1, and a light-transmitting glue layer 3 is covered on it. The functions of the light-transmitting glue layer 3 are: 1. Encapsulate the light-emitting chips 2; 2. Change the outgoing light color; 3. Improve the light extraction efficiency. A lens 4 is covered on the light-transmitting glue layer 3, and the lens 4 is used for optical shaping.

[0003] The existing problem is that no zoned optical shaping is performed on the first light-emitting chip 21 and the second light-emitting chip 22, and the light-emitting effect cannot meet the requirements of the application scenario. Even if an optical lens 4 is arranged above the light-transmitting glue layer 3, basically the same optical adjustment is made to the overall light source, and no zoned optical design is carried out for the first light-emitting chip 21 and the second light-emitting chip 22, resulting in low adaptability to the light-emitting chips 2 and it is difficult to achieve multiple divergence angles in the same light source device.

[0004] Based on the above, the problem to be solved currently is: to provide a multi-color light source device with multi-chip zoned light control, capable of emitting lights with multiple divergence angles, high light energy utilization rate, and small size and stable structure. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a multi-color light source device with zoned light distribution, aiming to solve the problems in the prior art, such as no zoned light control, inability to emit lights with multiple divergence angles, low light energy utilization rate, and poor product stability.

[0006] The utility model is implemented as follows. The multi-color light source device with zoned light distribution includes:

[0007] A bracket;

[0008] Light-emitting chips, which are arranged on the bracket and at least include a first light-emitting chip and a second light-emitting chip;

[0009] A light-transmitting glue layer, which is arranged on the bracket and covers the first light-emitting chip and the second light-emitting chip;

[0010] A lens, which is arranged on the bracket and covers the light-transmitting glue layer;

[0011] An optical isolation cavity, which is a cavity structure that the lens is recessed inward on the side close to the light-transmitting glue layer; the optical isolation cavity is arranged between the first light-emitting chip and the second light-emitting chip; the optical isolation cavity divides the lens into at least a first optical functional area and a second optical functional area; the first optical functional area and the second optical functional area are respectively arranged above the first light-emitting chip and the second light-emitting chip.

[0012] Further, a fluorescent glue layer is covered on the first light-emitting chip and / or the second light-emitting chip, and the light-transmitting glue layer covers the fluorescent glue layer.

[0013] Further, the peripheral side surfaces of the optical isolation cavity are set as a first reflecting surface for reflecting the edge large-angle light emitted by the first light-emitting chip and the second light-emitting chip.

[0014] Further, the cross-section of the optical isolation cavity is quasi-rectangular or quasi-trapezoidal.

[0015] Further, the optical isolation cavity is filled with air or filled with a light-transmitting glue layer or filled with a combination of air and a light-transmitting glue layer.

[0016] Further, the first optical functional area includes a first optical interface for inputting light and a second optical interface for outputting light; the second optical functional area includes a third optical interface for inputting light and a fourth optical interface for outputting light;

[0017] Second reflecting surfaces and third reflecting surfaces in an inverted conical shape are respectively arranged on the four peripheral edges of the first optical interface and the third optical interface, and the second reflecting surfaces and the third reflecting surfaces are used for reflecting edge large-angle light.

[0018] Further, the optical isolation cavity is higher than the light-transmitting glue layer and the bracket.

[0019] Further, the first optical functional area and the second optical functional area are convex lenses, and the second optical interface and the fourth optical interface are free-form surfaces.

[0020] Further, the top-view contour lines of the first optical functional area and the second optical functional area are respectively a first contour line and a second contour line, and the first contour line and the second contour line are quasi-rectangular.

[0021] Further, the light-emitting surface of the first light-emitting chip is larger than the light-emitting surface of the second light-emitting chip, the first optical functional area is higher than the second optical functional area, and the top-view area of the first optical functional area is larger than the top-view area of the second optical functional area.

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

[0023] The optical isolation cavity 5 of the present utility model divides the light source device into at least two optical functional zones (the first optical functional zone 41 and the second optical functional zone 42). The first optical functional zone 41 and the second optical functional zone 42 are respectively adapted to the first light-emitting chip 21 and the second light-emitting chip 22, and independent optical designs are respectively carried out on the first optical functional zone 41 and the second optical functional zone 42 to achieve zoned light control, so that the same light source device can emit light with multiple divergence angles and multiple colors, and has a small volume.

[0024] The first reflecting surface 51 of the optical isolation cavity 5 can reflect the large-angle light at the edges of the first optical functional zone 41 and the second optical functional zone 42 respectively towards the direction of their respective optical axes Z, effectively partitioning the zones, reducing the mixing of light in the first optical functional zone 41 and the second optical functional zone 42, affecting the light output effect, and having a good light collection effect.

[0025] The second reflecting surface 413 and the third reflecting surface 423 can effectively reflect the large-angle light around the first light-emitting chip 21 and the second light-emitting chip 22, reduce the divergence angle, improve the light energy, and easily and accurately achieve the preset divergence angle.

[0026] During the process of forming the light-transmitting glue layer 3 with the light-transmitting glue, the light-transmitting glue can be extruded into the optical isolation cavity 5. Due to the existence of the optical isolation cavity 5, the tolerance of the glue amount is improved, the yield is increased, and the influence of air bubbles in the light-transmitting glue layer 3 on the light output effect is avoided; on the other hand, because the light-transmitting glue is filled into the optical isolation cavity 5, the connection between the light-transmitting glue layer 3 and the lens 4 is made more firm. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic cross-sectional structure diagram of a multi-color light source device with zoned light distribution provided by the present utility model;

[0028] Figure 2 is a schematic cross-sectional structure diagram of a multi-color light source device with zoned light distribution according to Embodiment 1 provided by the present utility model;

[0029] Figure 3 is a schematic cross-sectional structure diagram of a multi-color light source device with zoned light distribution according to Embodiment 2 provided by the present utility model;

[0030] Figure 4 is provided by the present utility model Figure 1 optical path diagram of a multi-color light source device with zoned light distribution;

[0031] Figure 5 is provided by the present utility model Figure 2 optical path diagram of a multi-color light source device with zoned light distribution;

[0032] Figure 6 It is a schematic cross-sectional structure diagram of the multi-color light source device with zoned light distribution provided in the third embodiment of the present utility model;

[0033] Figure 7 It is a schematic cross-sectional structure diagram of the multi-color light source device with zoned light distribution provided in the fourth embodiment of the present utility model;

[0034] Figure 8 It is a top view of the multi-color light source device with zoned light distribution provided by the present utility model;

[0035] Figure 9 It is a top view of the multi-color light source device provided by the prior art;

[0036] Figure 10 It is a schematic cross-sectional structure diagram of the multi-color light source device provided by the prior art;

[0037] In the figure: 1 - bracket; 2 - light-emitting chip; 21 - first light-emitting chip; 22 - second light-emitting chip; 3 - light-transmitting glue layer; 4 - lens; 41 - first optical functional area; 411 - first optical interface; 412 - second optical interface; 413 - second reflecting surface; 414 - first contour line; 42 - second optical functional area; 421 - third optical interface; 422 - fourth optical interface; 423 - third reflecting surface; 424 - second contour line; 5 - optical isolation cavity; 51 - first reflecting surface; 6 - fluorescent glue layer; Z - optical axis. Specific embodiments

[0038] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, 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.

[0039] The implementation of the present utility model will be described in detail below with reference to specific embodiments.

[0040] In the accompanying 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 accompanying drawings. It 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 accompanying 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.

[0041] Refer to Figures 1-8As shown, it is a preferred embodiment provided by the present utility model.

[0042] The multi-color light source device with partitioned light distribution of the present utility model includes a bracket 1, a light-emitting chip 2, a light-transmitting glue layer 3, a lens 4, and an optical isolation cavity 5. Refer to Figure 1 .

[0043] The light-emitting chip 2 is arranged on the bracket 1 and at least includes a first light-emitting chip 21 and a second light-emitting chip 22. The first light-emitting chip 21 and the second light-emitting chip 22 can be set as light-emitting chips with the same light-emitting color or light-emitting chips with different light-emitting colors.

[0044] The light-transmitting glue layer 3 is arranged on the bracket 1 and tightly covers the sides and upper surfaces of the first light-emitting chip 21 and the second light-emitting chip 22, as well as the inside of the bowl of the bracket 1. The light-transmitting glue layer 3 can improve light extraction. Wavelength conversion particles can also be arranged in the light-transmitting glue layer 3 to change the light-emitting color; light diffusion particles can also be arranged to make the light emission uniform. Refer to Figure 3 , a fluorescent glue layer 6 can also be added between the light-transmitting glue layer 3 and the first light-emitting chip 21 and / or between the light-transmitting glue layer 3 and the second light-emitting chip 22 to change the light-emitting color of the first light-emitting chip 21 or / and the second light-emitting chip 22. Of course, light diffusion particles can also be added to the fluorescent glue layer 6.

[0045] The lens 4 is arranged on the bracket 1 and tightly covers at least a certain area of the light-transmitting glue layer 3 directly above the first light-emitting chip 21 and the second light-emitting chip 22, so as to optically shape the emitted light of the first light-emitting chip 21 and the second light-emitting chip 22 to achieve a preset divergence angle, spot shape, uniformity, etc.

[0046] The optical isolation cavity 5 is a cavity structure that the lens 4 sinks into the lens 4 on the side close to the light-transmitting glue layer 3, and the optical isolation cavity 5 is provided with an opening on the side facing the light-transmitting glue layer 3. The optical isolation cavity 5 is arranged between the first light-emitting chip 21 and the second light-emitting chip 22. The optical isolation cavity 5 divides the lens 4 into at least a first optical functional area 41 and a second optical functional area 42. The first optical functional area 41 and the second optical functional area 42 are respectively arranged above the first light-emitting chip 21 and the second light-emitting chip 22. Preferably, the optical isolation cavity 5 does not block the upper surfaces of the first light-emitting chip 21 and the second light-emitting chip 22, and is between the extension lines of the adjacent side surfaces of the first light-emitting chip 21 and the second light-emitting chip 22 upward (from the light-emitting chip 2 to the lens 4). The peripheral side surfaces of the optical isolation cavity 5 are set as a first reflecting surface 51 for reflecting the large-angle marginal light emitted by the first light-emitting chip 21 and the second light-emitting chip 22.

[0047] Specifically, the first way of the first reflecting surface 51: Refer to Figure 1 , Figure 4, the first reflecting surface 51 is set as a vertical plane parallel to the optical axis Z of the first light-emitting chip 21 or the second light-emitting chip 22, that is, the cross-section of the optical isolation cavity 5 is quasi-rectangular.

[0048] The second way of the first reflecting surface 51: Refer to Figure 2 , Figure 4 , the first reflecting surface 51 is set as a plane or a curved surface inclined at a certain angle to the optical axis Z of the first light-emitting chip 21 or the second light-emitting chip 22, that is, the cross-section of the optical isolation cavity 5 is quasi-trapezoidal. When the cross-section of the optical isolation cavity 5 is quasi-trapezoidal, its cross-section gradually decreases along the direction of the light-transmitting adhesive layer 3 towards the lens 4.

[0049] There are several filling methods for the optical isolation cavity 5 as follows:

[0050] Example 1: The optical isolation cavity 5 is completely filled with air. Refer to Figure 2 .

[0051] Example 3: The optical isolation cavity 5 is filled with a combination of the light-transmitting adhesive layer 3 and air. Preferably, the lower part of the optical isolation cavity 5 is filled with the light-transmitting adhesive layer 3 and the upper part is filled with air. Refer to Figure 6 .

[0052] Example 4: The optical isolation cavity 5 is completely filled with the light-transmitting adhesive layer 3. Refer to Figure 7 .

[0053] The refractive index of the lens 4 is greater than that of air and the light-transmitting adhesive layer 3. When the large-angle light at the edge of the first light-emitting chip 21 and the second light-emitting chip 22 is incident on the side surface of the optical isolation cavity 5, that is, the light propagates from an optically dense medium to an optically sparse medium. When the incident angle satisfies being greater than or equal to the critical angle, total internal reflection is likely to occur. Refer to Figures 4-5 , the light emitted by the first light-emitting chip 21 and the second light-emitting chip 22 acts on the side surface - the first reflecting surface 51 of the optical isolation cavity 5 and propagates respectively towards the direction of the optical axis Z close to the first optical functional area 41 and the second optical functional area 42, greatly reducing the light crosstalk between the first optical functional area 41 and the second optical functional area 42. The first optical functional area 41 and the second optical functional area 42 can be optically designed differently according to the differences between the first light-emitting chip 21 and the second light-emitting chip 22, and zone control of light is carried out to realize that the same light source device can emit light with multiple divergence angles and different colors, and has a small volume. The light collection effect of the entire light source is good, and the large-angle light at the edge is fully utilized, thereby improving the light efficiency.

[0054] In addition, the optical isolation cavity 5 of the present utility model also has the function of storing the light-transmitting glue. Refer to Figures 6-7, on the one hand, during the formation of the light-transmitting glue layer 3 from the light-transmitting glue, the light-transmitting glue can be extruded into the optical isolation cavity 5. Due to the existence of the accommodating cavity of the optical isolation cavity 5, the tolerance of the glue amount is increased, making the production difficulty small and avoiding the situation that air bubbles in the light-transmitting glue layer 3 affect the light output effect; on the other hand, since the light-transmitting glue is filled into the optical isolation cavity 5, the connection between the light-transmitting glue layer 3 and the lens 4 becomes more firm.

[0055] Further, the first optical functional region 41 includes a first optical interface 411 for inputting light and a second optical interface 412 for outputting light. The second optical functional region 42 includes a third optical interface 421 for inputting light and a fourth optical interface 422 for outputting light. The first optical functional region 41 and the second optical functional region 42 are preferably convex lenses 4, and the second optical interface 412 and the fourth optical interface 422 are free-form surfaces. The third optical interface 421 and the fourth optical interface 422 can be set as planes or free-form surfaces.

[0056] The peripheries of the first optical interface 411 and the third optical interface 421 are respectively provided with inverted conical second reflecting surfaces 413 and third reflecting surfaces 423. The second reflecting surfaces 413 and the third reflecting surfaces 423 are used for reflecting large-angle light.

[0057] The refractive index of the lens 4 is greater than that of the light-transmitting glue layer 3 and greater than that of air. The edge large-angle light emitted by the first light-emitting chip 21 and the second light-emitting chip 22 is respectively incident on the second reflecting surface 413 and the third reflecting surface 423, and after total reflection, they respectively propagate in the direction of the optical axis Z of the first optical functional region 41 and the second optical functional region 42, which can effectively improve the light energy utilization rate, is beneficial to optical shaping, is easy to achieve the preset divergence angle, and has a good light shaping effect.

[0058] Preferably, the height of the light-transmitting glue layer 3 is lower than the height of the bracket 1. The bottom of the periphery of the lens 4 is connected to the upper surface of the periphery of the bracket 1. The first optical interface 411 and the second reflecting surface 413, the third optical interface 421 and the third reflecting surface 423 on both sides of the optical isolation cavity 5 extend into the bracket 1 and are connected to the light-transmitting glue layer 3, making the connection between the lens 4 and the light-transmitting glue layer 3 more stable and also reducing the height of the light source device. The optical isolation cavity 5 is preferably higher than the light-transmitting glue layer 3 and higher than the bracket 1. The first optical functional region 41 and the second optical functional region 42 can be set differently according to different first light-emitting chips 21 and second light-emitting chips 22. For example, when the size of the first light-emitting chip 21 is larger than the size of the second light-emitting chip 22, the area of the first optical interface 411 can be set to be larger than that of the second optical interface 412. The third optical interface 421 is set to be higher than the fourth optical interface 422. The third optical interface 421 is set to be higher than the fourth optical interface 422.

[0059] The heights of the first optical functional area 41 and the second optical functional area 42 are proportional to the size of the light-emitting chip 2. The top-down view areas of the first optical functional area 41 and the second optical functional area 42 are proportional to the size of the light-emitting chip 2. That is, the larger the size of the light-emitting chip 2 corresponding to the first optical functional area 41 or the second optical functional area 42, the higher its height and the larger its area.

[0060] The top-down view contour lines of the first optical functional area 41 and the second optical functional area 42 are the first contour line 414 and the second contour line 424 respectively. Refer to Figure 8 The first contour line 414 and the second contour line 424 are quasi-rectangles. There is partial overlap between the first optical functional area 41 and the second optical functional area 42.

[0061] It is not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A multi-color light source device with partitioned light distribution, characterized in that, Comprising: A bracket (1); A light-emitting chip (2), which is disposed on the bracket (1) and at least includes a first light-emitting chip (21) and a second light-emitting chip (22); A light-transmitting glue layer (3), which is disposed on the bracket (1) and covers the first light-emitting chip (21) and the second light-emitting chip (22); A lens (4), which is disposed on the bracket (1) and covers the light-transmitting glue layer (3); An optical isolation cavity (5), which is a cavity structure that is recessed inward on the side of the lens (4) close to the light-transmitting glue layer (3); the optical isolation cavity (5) is disposed between the first light-emitting chip (21) and the second light-emitting chip (22); the optical isolation cavity (5) divides the lens (4) into at least a first optical functional area (41) and a second optical functional area (42); the first optical functional area (41) and the second optical functional area (42) are respectively disposed above the first light-emitting chip (21) and the second light-emitting chip (22).

2. The multi-color light source device with zoned light distribution according to claim 1, characterized in that, A fluorescent glue layer (6) is covered on the first light-emitting chip (21) and / or the second light-emitting chip (22), and the light-transmitting glue layer (3) covers the fluorescent glue layer (6).

3. The multi-color light source device with partitioned light distribution according to claim 1, wherein The peripheral side surfaces of the optical isolation cavity (5) are provided with a first reflecting surface (51) for reflecting the edge large-angle light emitted by the first light-emitting chip (21) and the second light-emitting chip (22).

4. The multi-color light source device with partitioned light distribution according to claim 3, wherein The cross-section of the optical isolation cavity (5) is quasi-rectangular or quasi-trapezoidal.

5. The multi-color light source device with partitioned light distribution according to claim 1, characterized in that The optical isolation cavity (5) is filled with air or filled with a light-transmitting glue layer (3) or filled with a combination of air and a light-transmitting glue layer (3).

6. The multi-color light source device with partitioned light distribution according to claim 1, characterized in that, The first optical functional area (41) includes a first optical interface (411) for inputting light and a second optical interface (412) for outputting light; the second optical functional area (42) includes a third optical interface (421) for inputting light and a fourth optical interface (422) for outputting light; Inverted conical second reflecting surfaces (413) and third reflecting surfaces (423) are respectively provided at the four peripheral edges of the first optical interface (411) and the third optical interface (421), and the second reflecting surfaces (413) and the third reflecting surfaces (423) are used for reflecting edge large-angle light.

7. The multi-color light source device with partitioned light distribution according to claim 1, characterized in that, The optical isolation cavity (5) is higher than the light-transmitting glue layer (3) and the bracket (1).

8. The multi-color light source device with partitioned light distribution according to claim 6, characterized in that, The first optical functional area (41) and the second optical functional area (42) are convex lenses, and the second optical interface (412) and the fourth optical interface (422) are free-form surfaces.

9. The multi-color light source device with partitioned light distribution according to claim 1, characterized in that, The top-view contour lines of the first optical functional area (41) and the second optical functional area (42) are respectively a first contour line (414) and a second contour line (424), and the first contour line (414) and the second contour line (424) are quasi-rectangular.

10. The multi-color light source device with partitioned light distribution according to claim 1, characterized in that, The light-emitting surface of the first light-emitting chip (21) is larger than that of the second light-emitting chip (22), the first optical functional area (41) is higher than the second optical functional area (42), and the top-view area of the first optical functional area (41) is larger than that of the second optical functional area (42).

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