Light source device and light emitting apparatus

Abstract

The application relates to a light source device and a light-emitting device. The light source device comprises a base, a plurality of light-emitting chips, a light diffusion glue layer and a reflector. The base is provided with a groove, the plurality of light-emitting chips are arranged in the groove at intervals, and the light-emitting chips are different in color. The light diffusion glue layer covers the plurality of light-emitting chips. The reflector is arranged on the base and is provided with a reflection hole. The light diffusion glue layer is located in one end of the reflection hole, and the other end of the reflection hole is a light outlet. The light source device covers all the light-emitting chips by arranging the light diffusion glue layer, the light-emitting chips of different colors are scattered in the light diffusion glue layer, the effect of fully mixing light is achieved, the mixed light enters the reflection hole, reflection mixing light occurs, secondary mixing light is realized, and finally uniform light is output from the light outlet, the phenomenon of edge monochromatic light is basically eliminated, and the light output quality of the light source device is remarkably improved.

Description

Technical Field

[0001] This application relates to the field of semiconductor light-emitting technology, and in particular to a light source device and a light-emitting apparatus. Background Technology

[0002] Traditional RGB light sources typically cover red LED chips (R), green LED chips (G), and blue LED chips (B) with a light-transmitting adhesive layer to protect all LED chips and allow them to emit light. The light beams from the three LED chips overlap and mix to output white light.

[0003] However, because the light beams of the three-color LED chips cannot completely overlap, the light emitted by the light source shining on the object or the light spot projected by the light source will have obvious monochromatic light at the edge, so the light output quality after mixing needs to be improved. Summary of the Invention

[0004] Therefore, it is necessary to provide a light source device and light-emitting device to address the issue that the light output quality after mixing traditional RGB light sources needs to be improved.

[0005] A light source device, comprising: The base has a groove. Multiple light-emitting chips are spaced apart within the groove and emit different colors. A light-diffusing adhesive layer, the light-diffusing adhesive layer covering the plurality of light-emitting chips; and A reflector, which is disposed on the base and has a reflective hole; The light-diffusing adhesive layer is located inside one end of the reflective aperture, and the other end of the reflective aperture is the light outlet.

[0006] In one embodiment, the reflective aperture includes a first aperture segment and a second aperture segment that are interconnected, the light-diffusing adhesive layer is located within the first aperture segment, and the second aperture segment is gradually enlarged in the direction away from the light-emitting chip; or the reflective aperture is gradually enlarged in the direction away from the light-emitting chip.

[0007] In one embodiment, the inner port of the second aperture segment is disposed on the front side of the light-diffusing adhesive layer.

[0008] In one embodiment, the first aperture segment is gradually reduced in the direction away from the light-emitting chip.

[0009] In one embodiment, the side of the light-diffusing adhesive layer is bonded to the wall of the reflective aperture; or, the light-diffusing adhesive layer is formed by injection molding within the reflective aperture.

[0010] In one embodiment, the hole wall of the reflective aperture is a reflective surface formed by the material of the reflector itself.

[0011] In one embodiment, the side of the reflector has an assembly area connected to one end face of the reflector; one end face of the reflector is located on the bottom of the groove, and the assembly area is adapted to the side wall of the groove.

[0012] In one embodiment, the reflector includes a main body and a mounting portion, the reflective aperture passes through both ends of the main body, the mounting portion extends outward from the side of the main body and is located between the two ends of the main body, and the mounting portion is mounted on the front of the base.

[0013] In one embodiment, the side of the main body has an outer region located between the mounting portion and the light-emitting port, and is tapered in a direction away from the light-emitting chip.

[0014] A light-emitting device, comprising: Circuit board; and At least one light source device is disposed on the circuit board, and each light source device is a light source device as described in any of the above embodiments.

[0015] The aforementioned light source device and light-emitting device achieve a thorough light mixing effect by covering all light-emitting chips with a light-diffusing adhesive layer. The different colors of light emitted by multiple light-emitting chips are scattered within the light-diffusing adhesive layer. The mixed light enters the reflection aperture and undergoes reflection and mixing, thus achieving secondary light mixing. Finally, uniform light is output from the light outlet, which essentially eliminates the phenomenon of monochromatic light at the edges and significantly improves the light output quality of the light source device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a light source device in one embodiment of this application.

[0017] Figure 2 for Figure 1 A top view of the light source device.

[0018] Figure 3 for Figure 2 A cross-sectional view of the light source device along line II.

[0019] Figure 4 for Figure 1 Exploded view of the light source device.

[0020] Figure 5 for Figure 1 A schematic diagram of the reflector structure of a light source device.

[0021] Figure 6 This is a cross-sectional view of a light source device in another embodiment of this application.

[0022] Figure 7 This is a cross-sectional view of a light-emitting device in one embodiment of this application.

[0023] Explanation of reference numerals in the attached figures: 100-Light source device; 110-Base; 112-Groove; 114-Cup body; 116-Pad; 120-Light-emitting chip; 130-Light-diffusing adhesive layer; 140-Reflector; 141-Reflection hole; 142-Light outlet; 143-First hole section; 144-Second hole section; 145-Inner port; 146-Assembly area; 147-Main body; 148-Mounting part; 149-External area; 200 - Light-emitting device; 210 - Circuit board. Detailed Implementation

[0024] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0025] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0026] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0028] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0030] Please see Figures 1 to 3 , Figure 1 A schematic diagram of the structure of a light source device in one embodiment of this application is shown. Figure 2 It shows Figure 1 Top view of the light source device. Figure 3 It shows Figure 2 A cross-sectional view of the light source device along line II. An embodiment of this application provides a light source device 100, including a base 110, a plurality of light-emitting chips 120, a light-diffusing adhesive layer 130, and a reflector 140. The base 110 has a groove 112. The plurality of light-emitting chips 120 are spaced apart within the groove 112 and emit different colors. The light-diffusing adhesive layer 130 covers the plurality of light-emitting chips 120. The reflector 140 is disposed on the base 110 and has a reflection aperture 141. The light-diffusing adhesive layer 130 is located within one end of the reflection aperture 141, and the other end of the reflection aperture 141 is a light outlet 142.

[0031] By setting a light-diffusing adhesive layer 130 to cover all light-emitting chips 120, the light emitted by multiple light-emitting chips 120 of different colors is scattered within the light-diffusing adhesive layer 130, thereby achieving a sufficient light mixing effect. The mixed light enters the reflection aperture 141 and undergoes reflection and light mixing, thus realizing secondary light mixing. Finally, uniform light is output from the light output port 142, which basically eliminates the phenomenon of edge monochromatic light and significantly improves the light output quality of the light source device 100. For example, after secondary light mixing, the light output port 142 can output high-quality white light.

[0032] It should be noted that the "direction away from the light-emitting chip 120" mentioned below refers to... Figure 3 The direction indicated by the middle arrow is also the light emission direction of the light-emitting chip 120.

[0033] Please see Figure 4 , Figure 4 An exploded view of the light source device in this embodiment is shown. The base 110 is cup-shaped and has a recess 112. The base 110 includes a cup body 114 and a pad 116 disposed on the cup body 114. The pad 116 can be connected to the electrodes of the light-emitting chip 120 via bonding wires (not shown). In other embodiments, the base 110 is an LED bracket, or the base 110 may include a substrate and a dam disposed on the substrate, with the recess 112 formed by the substrate and the dam.

[0034] The multiple light-emitting chips 120 include red LED chips, green LED chips, and blue LED chips. After the light emitted by the three-color LED chips enters the light-diffusing adhesive layer 130, it undergoes diffusion, allowing the three colors to fully mix. Then, reflection and mixing occur within the reflective aperture 141, avoiding the appearance of monochromatic light at the edges. The output white light meets the requirements and has high quality. However, the light-emitting chips 120 are not limited to LED chips. Furthermore, in alternative embodiments, the multiple light-emitting chips 120 may include two LED chips with different emitting colors; or, the multiple light-emitting chips 120 may include four or more LED chips, capable of emitting at least three different colors of light.

[0035] Furthermore, the red, green, and blue LED chips are arranged in a triangular pattern for better light mixing. In other embodiments, the three-color LED chips can be arranged side by side, and the LED chips are not limited to vertical chips; they can also be flip-chip or horizontal chips.

[0036] The light-diffusing adhesive layer 130 is a light-transmitting adhesive filled with diffusing powder. When light enters the light-transmitting adhesive and encounters the diffusing powder particles, it will be scattered. Different colors of light can be better mixed after scattering, resulting in uniform white light and basically eliminating edge monochromatic light.

[0037] Furthermore, the diffusing powder may include, but is not limited to, at least one of: SiO2, TiO2, ZnO, BaSO4, CaSO4, MgCO3, Al(OH)3, synthetic silica, glass beads, and diamond. The size of the diffusing powder is suitable for the formation of scattered light; for example, the diameter of the diffusing powder is 5 μm to 7 μm.

[0038] Furthermore, the light-transmitting adhesive can be, but is not limited to, silicone. Silicone has high light transmittance and relatively low shrinkage, so it will not affect the connection of the bonding wires on the light-emitting chip 120.

[0039] Please see Figure 5 Combined Figure 3 and Figure 4 , Figure 5 A schematic diagram of the reflector structure of the light source device in this embodiment is shown. The reflector 140 has a reflective aperture 141 comprising a first aperture segment 143 and a second aperture segment 144 that are interconnected. The light-diffusing adhesive layer 130 is located within the first aperture segment 143. The second aperture segment 144 gradually increases in size in the direction away from the light-emitting chip 120. After light enters the second aperture segment 144, the space within the second aperture segment 144 is larger, which is beneficial for multiple reflections and mixing of light, improving the mixing effect and resulting in more uniform and higher-quality white light output. Figure 5 The direction indicated by the middle arrow also refers to the direction away from the light-emitting chip 120. In other embodiments, the second aperture segment 144 may also be arranged in a cylindrical shape.

[0040] The first hole segment 143 of the reflective hole 141 is gradually reduced in the direction away from the light-emitting chip 120, and a draft angle is formed on the hole wall of the first hole segment 143, which is beneficial to the demolding of the mold core forming the first hole segment 143.

[0041] Furthermore, the second aperture segment 144 has an inner port 145 and an outer port. The outer port is the light emission port 142 of the light source device 100, and the inner port 145 is disposed on the front side of the light diffusing adhesive layer 130, so that the light emitted from the front side of the light diffusing adhesive layer 130 enters the second aperture segment 144. The front side of the light diffusing adhesive layer 130 is adapted to the inner port 145, that is, the size of the front side of the light diffusing adhesive layer 130 is equal to and overlaps with the size of the inner port 145. In an alternative embodiment, the size of the front side of the light diffusing adhesive layer 130 may be smaller than the size of the inner port 145.

[0042] To ensure the front surface of the light-diffusing adhesive layer 130 aligns with the inner port 145, the light-diffusing adhesive layer 130 completely fills the first aperture segment 143. Specifically, the light-diffusing adhesive layer 130 is formed by injection molding within the reflective aperture 141. In this process, the side surface of the light-diffusing adhesive layer 130 adheres to the wall of the reflective aperture 141, and the light-diffusing adhesive layer 130 is formed using the reflective aperture 141. After assembling the reflector 140, injecting an appropriate amount of light-diffusing adhesive into the reflective aperture 141 forms the light-diffusing adhesive layer 130, simplifying the manufacturing process and improving production efficiency. The front surface of the light-diffusing adhesive layer 130 can be a slightly concave curved surface or a flat surface formed using a mold. In an alternative embodiment, the light-diffusing adhesive layer 130 can be formed in the groove 112 using a mold, and the reflector 140 can be installed after the light-diffusing adhesive layer 130 has cured.

[0043] The wall of the reflective aperture 141 is a reflective surface formed by the material of the reflective element 140 itself. In other words, the reflective element 140 is made of a highly reflective material, and both its inner and outer surfaces can reflect light without the need for an additional reflective layer. Of course, in other embodiments, the reflective surface of the reflective aperture 141 can be formed by providing a coating, which can be, but is not limited to, a metal layer.

[0044] To facilitate better assembly of the reflector 140, the reflector 140 has an assembly area 146 on its side, which is connected to one end face of the reflector 140. One end face of the reflector 140 is located on the bottom of the groove 112, and the assembly area 146 is adapted to the side wall of the groove 112. This allows for proper positioning of the reflector 140 during adhesive bonding, ensuring it is installed correctly without the need for additional alignment. This simplifies the assembly of the reflector 140 and improves its installation efficiency.

[0045] Furthermore, the reflector 140 includes a main body 147 and a mounting portion 148. A reflective aperture 141 extends through both ends of the main body 147. The mounting portion 148 extends outward from the side of the main body 147 and is located between the two ends of the main body 147. The mounting portion 148 is mounted on the front surface of the base 110. By engaging the mounting portion 148 with the front surface of the base 110, the reflector 140 is more securely mounted on the base 110.

[0046] The side of the main body 147 has an outer region 149, which is located between the mounting part 148 and the light outlet 142 and is tapered in the direction away from the light-emitting chip 120 to form a draft angle, which is beneficial for demolding the mold of the mold forming the reflector 140.

[0047] The side of the main body 147 also has an internal region, which is the assembly area 146. It is located between the mounting part 148 and the light inlet. The internal region is adapted to the side wall of the groove 112 and also forms a draft angle, which is beneficial for demolding the mold of the reflector 140. It should be noted that the internal region is located inside the groove 112 and is not exposed. Conversely, the external region 149 is located outside the groove 112 and is exposed.

[0048] The material of the reflector 140 may be, but is not limited to, polyphthalamide (PPA), so that the reflector 140 is white and the surface of the reflector 140 can reflect light.

[0049] Please see Figure 6 , Figure 6 A cross-sectional view of a light source device according to another embodiment of this application is shown. Figure 6 The direction indicated by the middle arrow is also the direction away from the light-emitting chip 120. Compared with the two-segment reflective aperture of the light source device 100 in the above embodiment, the reflective aperture 141 of the light source device 100 in this embodiment is a single-segment reflective aperture, and the reflective aperture 141 is gradually enlarged in the direction away from the light-emitting chip 120. The light-diffusing adhesive layer 130 is located inside the reflective aperture 141, so that all the light emitted from the light-diffusing adhesive layer 130 can enter the reflective aperture 141 for secondary light mixing, thereby improving the light utilization rate.

[0050] The light-diffusing adhesive layer 130 is also formed by injecting adhesive into the reflection hole 141, which helps to simplify the manufacturing process and improve production efficiency. At the same time, the light-diffusing adhesive layer 130 can also play the role of bonding and fixing the reflector 140. It has an inverted structure and hooks the small end of the reflection hole 141, making the installation of the reflector 140 more stable.

[0051] As for the other aspects of the light source device 100 in this embodiment, they are basically the same as the other aspects of the light source device 100 in the above embodiments. The specific contents can be referred to the description of the above embodiments, and will not be repeated here.

[0052] Please see Figure 7 , Figure 7 A cross-sectional view of a light-emitting device according to an embodiment of this application is shown. The light-emitting device 200 provided in this embodiment includes a circuit board 210 and at least one light source device 100, which is disposed on the circuit board 210. The specific structure of the light source device 100 is as described in the above embodiments. Since the light-emitting device 200 in this embodiment adopts all the technical solutions of all the above embodiments, it also has all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0053] It should be noted that the application scenarios of the light-emitting device 200 can be, but are not limited to, lighting, display, and projection. For example, the light-emitting device 200 can be a lighting device that can project a uniform white light spot with high brightness and no edge monochromatic light.

[0054] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A light source device, characterized by comprising: include: A base (110) is provided with a groove (112); Multiple light-emitting chips (120) are spaced apart within the groove (112) and emit different colors. A light-diffusing adhesive layer (130) covering the plurality of light-emitting chips (120); and A reflector (140) is disposed on the base (110) and is provided with a reflective hole (141); The light-diffusing adhesive layer (130) is located inside one end of the reflective aperture (141), and the other end of the reflective aperture (141) is the light-emitting port (142).

2. The light source device according to claim 1, characterized in that, The reflective aperture (141) includes a first aperture segment (143) and a second aperture segment (144) that are interconnected. The light-diffusing adhesive layer (130) is located within the first aperture segment (143), and the second aperture segment (144) is gradually increased in size in the direction away from the light-emitting chip (120); or The reflective aperture (141) is gradually enlarged in the direction away from the light-emitting chip (120).

3. The light source device according to claim 2, characterized by The inner port (145) of the second hole segment (144) is disposed on the front side of the light diffusion adhesive layer (130).

4. The light source device according to claim 2, wherein The first aperture segment (143) is gradually reduced in size in the direction away from the light-emitting chip (120).

5. The light source device according to claim 1, wherein The side of the light-diffusing adhesive layer (130) is bonded to the wall of the reflective hole (141); or, the light-diffusing adhesive layer (130) is formed by injection molding into the reflective hole (141).

6. The light source device according to claim 1, wherein The wall of the reflective hole (141) is a reflective surface formed by the material of the reflective element (140) itself.

7. The light source device according to any one of claims 1 to 6, characterized in that, The side of the reflector (140) has an assembly area (146), which is connected to one end face of the reflector (140). One end face of the reflector (140) is located on the bottom of the groove (112), and the assembly area (146) is adapted to the side wall of the groove (112).

8. The light source device according to any one of claims 1 to 6, wherein The reflector (140) includes a main body (147) and a mounting part (148). The reflective hole (141) passes through both ends of the main body (147). The mounting part (148) extends outward from the side of the main body (147) and is located between the two ends of the main body (147). The mounting part (148) is mounted on the front of the base (110).

9. The light source device according to claim 8, characterized by The main body (147) has an outer region (149) on its side, which is located between the mounting part (148) and the light outlet (142) and is tapered in the direction away from the light-emitting chip (120).

10. A light-emitting device, characterized in that, include: Circuit board (210); and at least one light source device (100) arranged on the circuit board (210), each of the light source devices (100) being the light source device (100) according to any one of claims 1 to 9.

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