Multi-color light source device with partitioned light distribution
By introducing optical isolation cavities and reflective surfaces into multicolor light source devices, partitioned optical design for different light-emitting chips is realized, solving the problem that multicolor light source devices cannot emit light with multiple divergence angles, and improving light energy utilization and stability.
Patent Information
- Application Number
- CN202411133668.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-19
- Publication Date
- 2026-03-03
Smart Images
Figure CN121604580A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of semiconductor light-emitting technology, and more specifically, relates to a multicolor light source device with zoned light distribution. Background Technology
[0002] Multicolor light sources typically integrate multiple different light-emitting chips. These chips, due to differences in color, function, and optical effects, require different divergence angles and spot sizes. (See existing technology references.) Figure 9-10 At least two light-emitting chips 2 (a first light-emitting chip 21 and a second light-emitting chip 22) are disposed within the bracket 1, and a light-transmitting adhesive layer 3 is placed on top of them. The functions of the light-transmitting adhesive layer 3 are: 1. to encapsulate the light-emitting chips 2; 2. to change the color of the emitted light; and 3. to improve the light extraction efficiency. A lens 4 is placed on top of the light-transmitting adhesive layer 3, and the lens 4 is used for optical shaping.
[0003] The problem is that the first light-emitting chip 21 and the second light-emitting chip 22 are not optically shaped separately, resulting in light emission effects that do not meet the needs of the application scenario. Even when an optical lens 4 is placed above the light-transmitting adhesive layer 3, the optical adjustments are basically made to the entire light source in the same way. There is no optical design that differentiates between the first light-emitting chip 21 and the second light-emitting chip 22, resulting in low compatibility with the light-emitting chip 2 and making it difficult to achieve multiple divergence angles in the same light source device.
[0004] Based on the above, the current problem to be solved is to provide a multi-chip, multi-zone light control device that can emit light at multiple divergence angles, has high light energy utilization, and is small in size and structurally stable. Summary of the Invention
[0005] The purpose of this invention is to provide a multi-color light source device with zoned light distribution, which aims to solve the problems of existing technologies such as lack of zoned light control, inability to emit light with multiple divergence angles, low light energy utilization, and product stability.
[0006] This invention is implemented as follows: the multicolor light source device with zoned light distribution includes:
[0007] support;
[0008] A light-emitting chip, disposed on the support, includes at least a first light-emitting chip and a second light-emitting chip;
[0009] A light-transmitting adhesive layer is disposed on the bracket and covers the first light-emitting chip and the second light-emitting chip;
[0010] A lens, which is mounted on the bracket and covers the light-transmitting adhesive layer;
[0011] An optical isolation cavity is a cavity structure in which the lens is recessed inward on the side near the light-transmitting adhesive layer; the optical isolation cavity is disposed 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 disposed above the first light-emitting chip and the second light-emitting chip.
[0012] Furthermore, a fluorescent adhesive layer is covered on the first light-emitting chip and / or the second light-emitting chip, and the light-transmitting adhesive layer covers the fluorescent adhesive layer.
[0013] Furthermore, the four sides of the optical isolation cavity are configured as first reflective surfaces for reflecting edge-angle light emitted by the first light-emitting chip and the second light-emitting chip.
[0014] Furthermore, the cross-section of the optical isolation cavity is rectangular or trapezoidal.
[0015] Furthermore, the optical isolation cavity is filled with air, or filled with a light-transmitting adhesive layer, or a combination of air and a light-transmitting adhesive layer.
[0016] Furthermore, 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] The first optical interface and the third optical interface are respectively provided with an inverted cone-shaped second reflective surface and a third reflective surface at their four edges. The second reflective surface and the third reflective surface are used to reflect large-angle light at the edges.
[0018] Furthermore, the optical isolation cavity is higher than the light-transmitting adhesive layer and the support.
[0019] Furthermore, 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 freeform surfaces.
[0020] Furthermore, the top-view outlines of the first optical functional area and the second optical functional area are respectively the first outline and the second outline, and the first outline and the second outline are rectangular in shape.
[0021] Furthermore, the light-emitting surface of the first light-emitting chip is larger than that 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 that of the second optical functional area.
[0022] Compared with the prior art, the multicolor light source device with zoned light distribution provided by the present invention has the following beneficial effects:
[0023] The optical isolation cavity 5 of the present invention divides the light source device into at least two optical functional areas (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 adapted to the first light-emitting chip 21 and the second light-emitting chip 22, and the first optical functional area 41 and the second optical functional area 42 are independently optically designed to achieve zoned light control, so that the same light source device can emit light with multiple divergence angles and multiple colors, and is small in size.
[0024] The first reflecting surface 51 of the optical isolation cavity 5 can reflect the large-angle light from the edges of the first optical functional area 41 and the second optical functional area 42 towards their respective optical axes Z, effectively dividing the light into zones. This can reduce the mixing of light between the first optical functional area 41 and the second optical functional area 42, thus reducing the light output effect and improving the light collection effect.
[0025] The second reflective surface 413 and the third reflective surface 423 can effectively reflect the large-angle light from the edges around the first light-emitting chip 21 and the second light-emitting chip 22, reduce the divergence angle, increase light energy, and easily and accurately achieve the preset divergence angle.
[0026] During the process of forming the light-transmitting adhesive layer 3, the light-transmitting adhesive can be squeezed into the optical isolation cavity 5. The presence of the optical isolation cavity 5 increases the tolerance of the amount of adhesive, improves the yield, and avoids the presence of air bubbles in the light-transmitting adhesive layer 3, which would affect the light output effect. On the other hand, the light-transmitting adhesive filling the optical isolation cavity 5 makes the connection between the light-transmitting adhesive layer 3 and the lens 4 more secure. Attached Figure Description
[0027] Figure 1 This is a cross-sectional structural diagram of the multicolor light source device with zoned light distribution provided by the present invention;
[0028] Figure 2 This is a cross-sectional structural diagram of the multicolor light source device with zoned light distribution according to Embodiment 1 of the present invention;
[0029] Figure 3 This is a cross-sectional structural diagram of the multicolor light source device with zoned light distribution according to Embodiment 2 of the present invention;
[0030] Figure 4 This invention provides Figure 1 Optical path diagram of a multicolor light source device with zoned light distribution;
[0031] Figure 5 This invention provides Figure 2 Optical path diagram of a multicolor light source device with zoned light distribution;
[0032] Figure 6 This is a cross-sectional structural schematic diagram of the multicolor light source device with zoned light distribution according to Embodiment 3 of the present invention;
[0033] Figure 7 This is a cross-sectional structural schematic diagram of the multicolor light source device with zoned light distribution according to Embodiment 4 of the present invention;
[0034] Figure 8 This is a top view of the multicolor light source device with zoned light distribution provided by the present invention;
[0035] Figure 9 This is a top view of a multicolor light source device provided by existing technology;
[0036] Figure 10 This is a cross-sectional structural diagram of a multicolor light source device provided by existing technology;
[0037] In the diagram: 1-Support; 2-Light-emitting chip; 21-First light-emitting chip; 22-Second light-emitting chip; 3-Transparent adhesive layer; 4-Lens; 41-First optical functional area; 411-First optical interface; 412-Second optical interface; 413-Second reflective surface; 414-First contour line; 42-Second optical functional area; 421-Third optical interface; 422-Fourth optical interface; 423-Third reflective surface; 424-Second contour line; 5-Optical isolation cavity; 51-First reflective surface; 6-Fluorescent adhesive layer; Z-Optical axis. Detailed Implementation
[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the invention 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 merely illustrative and not intended to limit the invention.
[0039] The implementation of the present invention 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 this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0041] Reference Figure 1-8 The image shows a preferred embodiment of the present invention.
[0042] The multicolor light source device with zoned light distribution of the present invention includes a bracket 1, a light-emitting chip 2, a light-transmitting adhesive layer 3, a lens 4, and an optical isolation cavity 5, as shown in the figure. Figure 1 .
[0043] The light-emitting chip 2 is disposed on the bracket 1, and includes at least 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 light-emitting chips with the same emission color or light-emitting chips with different emission colors.
[0044] A light-transmitting adhesive layer 3 is disposed on the support 1 and tightly covers the sides and top surfaces of the first light-emitting chip 21 and the second light-emitting chip 22, as well as the inside of the cup covering the support 1. The light-transmitting adhesive layer 3 can improve light extraction. Wavelength conversion particles can also be disposed within the light-transmitting adhesive layer 3 to change the emitted light color; light-diffusing particles can also be disposed within it to ensure uniform light emission. See also Figure 3 Furthermore, a fluorescent adhesive layer 6 can be added between the light-transmitting adhesive layer 3 and the first light-emitting chip 21, or / and between the light-transmitting adhesive layer 3 and the second light-emitting chip 22, to change the light emitted by the first light-emitting chip 21 or / and the second light-emitting chip 22. Of course, light-diffusing particles can also be added to the fluorescent adhesive layer 6.
[0045] Lens 4 is mounted on bracket 1 and at least tightly covers a certain area of light-transmitting adhesive layer 3 directly above the first light-emitting chip 21 and the second light-emitting chip 22. It is used to optically shape the emitted light from the first light-emitting chip 21 and the second light-emitting chip 22 to achieve preset divergence angle, light spot shape and uniformity, etc.
[0046] The optical isolation cavity 5 is a cavity structure formed by the lens 4 recessed into the lens 4 on the side near the light-transmitting adhesive layer 3. The optical isolation cavity 5 has an opening on the side facing the light-transmitting adhesive layer 3. The optical isolation cavity 5 is located 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 located above the first light-emitting chip 21 and the second light-emitting chip 22. Preferably, the optical isolation cavity 5 does not obstruct the upper surfaces of the first light-emitting chip 21 and the second light-emitting chip 22, and is located between the upward extension lines (from the self-emissive chip 2 towards the lens 4) of the adjacent side surfaces of the first light-emitting chip 21 and the second light-emitting chip 22. The surrounding side surfaces of the optical isolation cavity 5 are configured as first reflective surfaces 51 for reflecting large-angle edge light emitted by the first light-emitting chip 21 and the second light-emitting chip 22.
[0047] Specifically, the first method of the first reflecting surface 51: refer to Figure 1 , Figure 4The first reflective 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 rectangular.
[0048] The second method for the first reflecting surface 51: Refer to Figure 2 , Figure 4 The first reflective surface 51 is set as a plane or curved surface that is tilted 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 trapezoidal. When the cross-section of the optical isolation cavity 5 is trapezoidal, its cross-section gradually decreases along the direction from the light-transmitting adhesive layer 3 to the lens 4.
[0049] The optical isolation cavity 5 can be filled in the following ways:
[0050] Example 1: The optical isolation cavity 5 is completely filled with air, as shown in the following example. Figure 2 .
[0051] Example 3: The optical isolation cavity 5 is filled with a combination of a 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, as shown in the reference. Figure 6 .
[0052] Example 4: The optical isolation cavity 5 is completely filled with a light-transmitting adhesive layer 3, as shown in the reference. Figure 7 .
[0053] The refractive index of lens 4 is greater than that of air and the light-transmitting adhesive layer 3. When large-angle light from the edges of the first light-emitting chip 21 and the second light-emitting chip 22 is incident on the side of the optical isolation cavity 5, i.e., the light propagates from the optically denser medium to the optical comb medium, total internal reflection easily occurs when the incident angle is greater than or equal to the critical angle. (Refer to...) Figure 4-5 The light emitted by the first light-emitting chip 21 and the second light-emitting chip 22 is acted upon by the side surface of the optical isolation cavity 5—the first reflective surface 51—and propagates in the direction of the optical axis Z, close to the first optical functional area 41 and the second optical functional area 42, respectively, significantly reducing 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 designed differently depending on the first light-emitting chip 21 and the second light-emitting chip 22, enabling zoned light control. This allows the same light source device to emit light with multiple divergence angles and different colors, while maintaining a compact size. The overall light source has good light collection effect, and the large-angle light at the edges is fully utilized, thereby improving luminous efficiency.
[0054] In addition, the optical isolation cavity 5 of the present invention also serves to store light-transmitting adhesive, as shown in the reference. Figure 6-7On the one hand, during the process of forming the light-transmitting adhesive layer 3, the light-transmitting adhesive can be squeezed into the optical isolation cavity 5. The existence of the optical isolation cavity 5 increases the tolerance of the amount of adhesive, making the production process easier and avoiding the situation where air bubbles exist in the light-transmitting adhesive layer 3, which would affect the light output effect. On the other hand, because the light-transmitting adhesive is filled into the optical isolation cavity 5, the connection between the light-transmitting adhesive layer 3 and the lens 4 is more secure.
[0055] Furthermore, 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 freeform surfaces. The third optical interface 421 and the fourth optical interface 422 can be set as planes or freeform surfaces.
[0056] The first optical interface 411 and the third optical interface 421 are respectively provided with an inverted conical second reflective surface 413 and a third reflective surface 423 around their four edges. The second reflective surface 413 and the third reflective surface 423 are used to reflect large-angle light.
[0057] The refractive index of lens 4 is greater than that of the light-transmitting adhesive layer 3 and greater than that of air. The large-angle edge light emitted by the first light-emitting chip 21 and the second light-emitting chip 22 is incident on the second reflecting surface 413 and the third reflecting surface 423, respectively. After total internal reflection, the light propagates in the direction of the optical axis Z of the first optical functional area 41 and the second optical functional area 42, respectively. This can effectively improve the light energy utilization rate, facilitate optical shaping, and make it easy to achieve the preset divergence angle, resulting in good light shaping effect.
[0058] Preferably, the height of the light-transmitting adhesive layer 3 is lower than the height of the bracket 1. The bottom edges of the lens 4 are connected to the upper edges of the bracket 1. The first optical interface 411, the second reflective surface 413, the third optical interface 421, and the third reflective surface 423 on both sides of the optical isolation cavity 5 extend into the bracket 1 and connect with the light-transmitting adhesive layer 3. This makes the connection between the lens 4 and the light-transmitting adhesive layer 3 more stable and also reduces the height of the light source device. The optical isolation cavity 5 is preferably higher than the light-transmitting adhesive layer 3 and higher than the bracket 1. The first optical functional area 41 and the second optical functional area 42 can be configured differently depending on the first light-emitting chip 21 and the second light-emitting chip 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 the area of the second optical interface 412. 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 directly proportional to the size of the light-emitting chip 2. The top-view area of the first optical functional area 41 and the second optical functional area 42 is also directly 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 greater its height and the larger its area.
[0060] The top-view outlines of the first optical functional area 41 and the second optical functional area 42 are the first outline 414 and the second outline 424, respectively, as shown in the reference. Figure 8 The first contour line 414 and the second contour line 424 are rectangular in shape. The first optical functional area 41 and the second optical functional area 42 partially overlap.
[0061] This invention is not intended to limit the scope of the invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.
Claims
1. A multicolor light source device with zoned light distribution, characterized in that, include: Support (1); The light-emitting chip (2) is disposed on the support (1) and includes at least a first light-emitting chip (21) and a second light-emitting chip (22). A light-transmitting adhesive layer (3) is disposed on the bracket (1) and covers the first light-emitting chip (21) and the second light-emitting chip (22). Lens (4), which is disposed on the bracket (1) and covers the light-transmitting adhesive layer (3); An optical isolation cavity (5) is a cavity structure in which the lens (4) is recessed inward on the side near the light-transmitting adhesive 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 multicolor light source device with zoned light distribution according to claim 1, characterized in that, The first light-emitting chip (21) and / or the second light-emitting chip (22) are covered with a fluorescent adhesive layer (6), and the light-transmitting adhesive layer (3) covers the fluorescent adhesive layer (6).
3. The multicolor light source device with zoned light distribution according to claim 1, characterized in that, The four sides of the optical isolation cavity (5) are configured as a first reflective surface (51) for reflecting the edge-angle light emitted by the first light-emitting chip (21) and the second light-emitting chip (22).
4. The multicolor light source device with zoned light distribution according to claim 3, characterized in that, The cross-section of the optical isolation cavity (5) is rectangular or trapezoidal.
5. The multicolor light source device with zoned light distribution according to claim 1, characterized in that, The optical isolation cavity (5) is filled with air or with a light-transmitting adhesive layer (3) or a combination of air and a light-transmitting adhesive layer (3).
6. The multicolor light source device with zoned 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. The first optical interface (411) and the third optical interface (421) are respectively provided with an inverted cone-shaped second reflective surface (413) and a third reflective surface (423) on their four edges. The second reflective surface (413) and the third reflective surface (423) are used to reflect large-angle light at the edges.
7. The multicolor light source device with zoned light distribution according to claim 1, characterized in that, The optical isolation cavity (5) is higher than the light-transmitting adhesive layer (3) and the bracket (1).
8. The multicolor light source device with zoned light distribution according to claim 1, 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 freeform surfaces.
9. The multicolor light source device with zoned light distribution according to claim 1, characterized in that, The top view outlines of the first optical functional area (41) and the second optical functional area (42) are the first outline (414) and the second outline (424), respectively, and the first outline (414) and the second outline (424) are rectangular.
10. The multicolor light source device with zoned light distribution according to claim 1, characterized in that, The light-emitting surface of the first light-emitting chip (21) is larger than the light-emitting surface 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 the top view area of the second optical functional area (42).