Light emitting device

Abstract

The utility model relates to a light emitting device. The light-emitting device comprises a light-emitting assembly, a first lens, a cut-off piece and a second lens, wherein the light-emitting assembly is provided with a light-emitting surface. The first lens is arranged on the light-emitting assembly, and the light incident face of the first lens is arranged above all the light-emitting faces at intervals. The cut-off piece is arranged on the first lens and provided with a light passing hole, and the cut-off piece is configured to at least cut off edge light of the light emitting face of the first lens. The second lens is arranged on the cut-off piece corresponding to the light passing hole. The light-emitting device is provided with the cut-off piece, the light passing hole of the cut-off piece can allow most of light emitted by the first lens to pass through, the cut-off piece can at least cut off edge light of the light-emitting face of the first lens so as to redefine projection light spots of the light-emitting device, the light spot edges are clear, no transition black shadow exists, and the light spots are good in uniformity. The size of the light-emitting device is obviously reduced, miniaturization of the light-emitting device is facilitated, and application scenes of the light-emitting device are increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of semiconductor light emitting, in particular to a light emitting device. BACKGROUND

[0002] The conventional LED light emitting structure is usually to set a fluorescent glue layer on the LED chip and set a lens above the fluorescent glue layer. In order to cover the light emitting angle range of the LED chip, the area of the lens needs to be designed to be much larger than the area of the light emitting surface of the LED chip, which results in the volume of the lens being too large. Because the area of the light emitting surface of the lens is large, the brightness of the light emitting surface decreases from the center to the edge, which results in the edge of the light spot projected by the lens being unclear, and there is a clear transition shadow from bright to dark. SUMMARY

[0003] Therefore, it is necessary to provide a light emitting device to solve the problem that the edge of the light spot projected by the lens is unclear and there is a clear transition shadow from bright to dark due to the large area of the light emitting surface of the lens.

[0004] A light emitting device comprises:

[0005] A light emitting assembly, the light emitting assembly having at least one light emitting surface;

[0006] A first lens, the first lens being arranged on the light emitting assembly, an incident light surface of the first lens being arranged above all the light emitting surfaces;

[0007] A cutoff piece, the cutoff piece being arranged on the first lens and being provided with a light passing hole, the cutoff piece being configured to cut off at least the edge light emitting of the light emitting surface of the first lens; and

[0008] A second lens, the second lens being arranged on the cutoff piece corresponding to the light passing hole.

[0009] In one of the embodiments, taking the same plane where all the light emitting surfaces are located as a reference plane, the smallest hole edge of the light passing hole forms a first orthographic projection on the reference plane, the light emitting surface of the first lens forms a second orthographic projection on the reference plane, the first orthographic projection covers all the light emitting surfaces and is located inside the second orthographic projection.

[0010] In one of the embodiments, the first lens is an integral structure and comprises a support part and a lens part; the support part is supported between the light emitting assembly and the cutoff piece, and the lens part is arranged on the inner side of the support part; or the support part is supported on the light emitting assembly, the lens part is arranged at the top end of the support part, and the cutoff piece is arranged on the top surface of the lens part.

[0011] In one of the embodiments, the light-out surface of the first lens is a convex curved surface; the cutoff piece is a one-piece structure, and includes an avoiding part and a cutoff part, the light-passing hole is formed on the cutoff part, and the avoiding part is supported between the top surface of the first lens and the cutoff part to provide an avoiding space for the light-out surface of the first lens.

[0012] In one of the embodiments, the light-emitting assembly includes a substrate and at least one light-emitting chip, the light-emitting chip is arranged on the substrate, the light-emitting surface is formed on the light-emitting chip, the first lens is arranged on the substrate, and the side surface of the substrate and the side surface of the first lens are arranged in a coplanar manner; or the light-emitting assembly includes a support and at least one light-emitting chip, the support is provided with a mounting groove, the light-emitting chip is arranged in the mounting groove, the light-emitting surface is formed on the light-emitting chip, the first lens is arranged on the top surface of the support, and the side surface of the support and the side surface of the first lens are arranged in a coplanar manner.

[0013] In one of the embodiments, the side surface of at least one of the cutoff piece and the second lens is arranged in a coplanar manner with the side surface of the first lens.

[0014] A light-emitting device includes:

[0015] A light-emitting assembly has at least one light-emitting surface;

[0016] A first lens is arranged on the light-emitting assembly, and the light-in surface of the first lens is arranged above the light-emitting surface in a spaced manner;

[0017] A second lens is arranged on the first lens; and

[0018] A cutoff piece is arranged on the second lens, and is provided with a light-passing hole, the cutoff piece is configured to cut off at least the edge light of the light-out surface of the second lens.

[0019] In one of the embodiments, with the same plane where all the light-emitting surfaces are located as a reference plane, the smallest hole edge of the light-passing hole projects a third orthographic projection on the reference plane, the light-out surface of the second lens projects a fourth orthographic projection on the reference plane, the third orthographic projection covers all the light-emitting surfaces, and is located inside the fourth orthographic projection.

[0020] In one of the embodiments, the first lens is a one-piece structure, and includes a supporting part and a lens part, the supporting part is supported between the light-emitting assembly and the second lens, and the lens part is arranged on the inner side of the supporting part.

[0021] In one of the embodiments, the side surface of the light-emitting assembly, the side surface of the first lens, and the side surface of the second lens are arranged in a coplanar manner.

[0022] The light emitting device, by setting the cut-off piece on the lens (the first lens or the second lens), the cut-off piece is provided with a light passing hole, the light passing hole can pass most of the light emitted by the light emitting surface of the lens, so that the cut-off piece can at least cut off the edge light emission of the light emitting surface of the lens, so as to redefine the projection light spot of the light emitting device, the edge of the projection light spot is clear, there is no transition shadow from bright to dark, and the uniformity of the light spot is good; secondly, because the cut-off piece will inevitably cut off part of the light emission of the light emitting chip, the first lens or the second lens does not need to completely cover the light emission angle range of the light emitting chip, so as to reduce the volume of the lens, so that the volume of the whole light emitting device is significantly reduced, which is beneficial to the miniaturization of the light emitting device and increases the application scene. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a cross-sectional view of the light emitting device in the first embodiment of the present application.

[0024] Figure 2 It is a cross-sectional view of the light emitting device in the first embodiment of the present application. Figure 1 It is an orthographic projection view of the light emitting surface of the light emitting assembly, the minimum hole edge of the light passing hole and the light emitting surface of the first lens in the light emitting device.

[0025] Figure 3 It is a cross-sectional view of the light emitting device in the second embodiment of the present application.

[0026] Figure 4 It is a cross-sectional view of the light emitting device in the third embodiment of the present application.

[0027] Figure 5 It is a cross-sectional view of the light emitting device in the fourth embodiment of the present application.

[0028] Figure 6 It is a cross-sectional view of the light emitting device in the fifth embodiment of the present application.

[0029] Figure 7 It is a cross-sectional view of the light emitting device in the fifth embodiment of the present application. Figure 6 It is an orthographic projection view of the light emitting surface of the light emitting assembly, the minimum hole edge of the light passing hole and the light emitting surface of the second lens in the light emitting device.

[0030] Figure 8 It is a cross-sectional view of the light emitting device in the sixth embodiment of the present application.

[0031] BRIEF DESCRIPTION OF DRAWINGS:

[0032] 100 - light emitting device;

[0033] 110 - light emitting assembly; 111 - light emitting surface; 112 - substrate; 113 - light emitting chip; 114 - support; 115 - mounting groove; 116 - base; 117 - conductive structure; 118 - first part; 119 - second part;

[0034] 120 - first lens; 122 - support portion; 124 - lens portion; 126 - second orthographic projection;

[0035] 130 - cutoff member; 131 - light passing hole; 132 - minimum hole rim; 133 - first orthographic projection; 134 - avoidance portion; 135 - cutoff portion; 136 - third orthographic projection;

[0036] 140 - second lens; 142 - fourth orthographic projection; 150 - diffusion layer; 160 - fluorescent glue layer. DETAILED DESCRIPTION

[0037] In order to make the above objectives, features and advantages of the present application more apparent, the specific embodiments of the present application will be described in detail below with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described and it is therefore contemplated to cover all such modifications as fall within the scope of the application. It is to be understood that the specific embodiments of the present application are illustrative only and not restrictive, as the scope of the application will be governed by the appended claims and equivalents thereof.

[0038] In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0039] In addition, if the terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0040] In the present application, unless specifically defined otherwise and limited, if there are terms such as "mount", "connect", "connection", "fix", and the like, these terms should be interpreted in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] In the present application, unless specifically defined otherwise and limited, if there are terms such as "mount", "connect", "connection", "fix", and the like, these terms should be interpreted in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used in the present application are for illustrative purposes only and do not represent the only implementation.

[0043] Please refer to Figure 1 and Figure 2 , Figure 1 shows a cross-sectional view of a light emitting device in the first embodiment of the present application, Figure 2 shows Figure 1 a front projection view of the light emitting surface of the light emitting assembly, the minimum hole edge of the light passing hole, and the light emitting surface of the first lens of the light emitting device in the first embodiment of the present application, the first embodiment of the present application provides a light emitting device 100, which includes a light emitting assembly 110, a first lens 120, a cutoff member 130, and a second lens 140. The light emitting assembly 110 has at least one light emitting surface 111. The first lens 120 is disposed on the light emitting assembly 110, and the light entering surface of the first lens 120 is spaced above all the light emitting surfaces 111. The cutoff member 130 is disposed on the first lens 120, and is provided with a light passing hole 131, and the cutoff member 130 is configured to at least cut off the edge light emission of the light emitting surface of the first lens 120. The second lens 140 is disposed on the cutoff member 130 corresponding to the light passing hole 131.

[0044] By setting the cutoff piece 130 between the first lens 120 and the second lens 140, the cutoff piece 130 is provided with the light passing hole 131, which can allow most of the light emitted by the light emitting surface of the first lens 120 to pass through, so that the cutoff piece 130 can at least cut off the edge light emission of the light emitting surface of the first lens 120, so as to redefine the projection light spot of the light emitting device 100, which has clear edges, no transition shadow from bright to dark, and good uniformity of the light spot. Secondly, because the cutoff piece 130 will inevitably cut off part of the light emission of the light emitting chip 113, the first lens 120 does not need to cover the light emission angle range of the light emitting chip 113, so as to reduce the volume of the first lens 120, and the cutoff piece 130 and the second lens 140 are adapted to the first lens 120, so that the volume of the entire light emitting device 100 is significantly reduced, which is beneficial to the miniaturization of the light emitting device 100 and increases the application scenarios. In addition, the second lens 140 can shape the light emitted from the light passing hole 131, so as to enhance the light control ability of the light emitting device 100 to meet the needs of users for different light types.

[0045] In the embodiment, the light emitting assembly 110 includes a substrate 112 and at least one light emitting chip 113, the light emitting chip 113 is arranged on the substrate 112, and the light emitting surface 111 is formed on the light emitting chip 113. The first lens 120 is arranged on the substrate 112.

[0046] The substrate 112 can be a plate body provided with a circuit (not shown), which not only plays a role of bearing the light emitting chip 113, but also can electrically connect the light emitting chip 113 with external devices through the circuit. The material of the plate body can be, but is not limited to, glass, resin or ceramic.

[0047] The light emitting chip 113 can be an LED chip or a semiconductor laser chip, but is not limited to this. The light emitting chip 113 can be a positive chip or a flip chip. The number of light emitting chips 113 can be set according to actual needs, and can be, but is not limited to, one.

[0048] In the embodiment, the light emitting device 100 further includes a diffusion layer 150, which is arranged on the top surface of the light emitting chip 113, and the top surface of the diffusion layer 150 is provided with a plurality of microstructures (not numbered), which can diffuse the light emitted by the light emitting chip 113, improve the light mixing effect, weaken or eliminate chromatic dispersion, sharpen the light spot edge, and make the projection light spot more uniform. The side surface of the diffusion layer 150 can be arranged to protrude from the side surface of the light emitting chip 113, so as to collect more light emission from the top surface of the light emitting chip 113.

[0049] The microstructures can be arranged regularly, such as in an array, or irregularly. These microstructures can be, but are not limited to, microlenses, microstrips, microcircles, or microprisms. The microlenses can be hemispherical, tetragonal, or hexagonal, but are not limited to these shapes.

[0050] To further enhance the light diffusion effect, the diffusion layer 150 may also be filled with scattering particles, which may include, but are not limited to, at least one of the following: SiO2, TiO2, ZnO, BaSO4, CaSO4, MgCO3, Al(OH)3, synthetic silica, glass beads, and diamond. The size of the scattering particles is suitable for the formation of scattered light; for example, the diameter of the scattering particles is 5 μm to 7 μm.

[0051] In this embodiment, the light-emitting device 100 further includes a fluorescent adhesive layer 160, which is disposed between the top surface of the light-emitting chip 113 and the diffusion layer 150, and can convert the emission color of the light-emitting chip 113 to meet the needs of different emission colors. The side of the fluorescent adhesive layer 160 extends beyond the side of the light-emitting chip 113 and is located inside the side of the diffusion layer 150, thereby increasing light absorption.

[0052] It should be noted that in other embodiments, only the diffusion layer 150 or the fluorescent adhesive layer 160 is disposed on the top surface of the light-emitting chip 113, or no adhesive layer is disposed on the light-emitting chip 113, and its top surface directly faces the lens portion 124 of the first lens 120.

[0053] In this embodiment, the first lens 120 is an integral structure, including a support portion 122 and a lens portion 124. The support portion 122 is supported between the light-emitting component 110 and the cut-off member 130, and the lens portion 124 is disposed inside the support portion 122. The support portion 122 serves to support both the lens portion 124 and the cut-off member 130. During assembly, only the bottom end of the support portion 122 needs to be glued and fixed to the substrate 112 to complete the installation of the first lens 120. There is no need to fix the support structure and the lens separately, which simplifies the process of the light-emitting device 100, improves its production efficiency, reduces production costs, and significantly simplifies the structure of the light-emitting device 100.

[0054] Combination Figure 1In the embodiment, the side surface of the first lens 120 is arranged in the same plane with the side surface of the substrate 112, that is, the profile line of the side surface of the first lens 120 and the profile line of the side surface of the substrate 112 are located on the same straight line, so as to facilitate laser cutting or metal cutting of the substrate 112 and the first lens 120 of the single device, and to facilitate simplification of the production process and improvement of the production efficiency. For example, when the light emitting device 100 is circular, the side surface of the first lens 120 and the side surface of the substrate 112 are both cylindrical side surfaces and are axially flush. When the light emitting device 100 is square, the side surface of the first lens 120 and the side surface of the substrate 112 are both square and are located on the same plane.

[0055] The first lens 120 is specifically in the shape of "H", wherein the lens part 124 is a convex lens and plays a role of light condensation, so as to improve the brightness of the projected light spot of the light emitting device 100 and the definition of the edge of the light spot. The lens part 124 can be specifically but is not limited to a double convex lens.

[0056] In the forming process, the support part 122 can be first molded by a mold, and then the lens part 124 can be formed inside the support part 122 by means of the mold. When the lens part 124 is formed, an appropriate amount of glue can be added in the mold cavities of the lower mold and the upper mold respectively, the lower mold is inserted into the support part 122 from bottom to top, and the upper mold is inserted into the support part 122 from top to bottom. The glue in the upper mold can overcome the gravity by its viscosity and not flow out. The upper and lower molds are closed, the glue flows in the mold cavities and contacts the inner side surface of the support part 122, and is solidified and demolded, that is, the lens part 124 is formed on the inner side surface of the support part 122. The material of the support part 122 and the lens part 124 is the same, so that the effect of integral molding is better. The material can be specifically but is not limited to silicone or epoxy resin. It should be noted that in other embodiments, the first lens 120 is a split structure, and the lens part 124 can be fixed on the inner side of the support part 122 by means of buckling or adhesion.

[0057] In the embodiment, the light passing hole 131 of the cutoff part 130 is arranged in a tapered manner in the light emitting direction of the optical axis, that is, the light inlet of the light passing hole 131 is larger than the light outlet, and the inner side surface of the light passing hole 131 can further cut part of the light entering the light passing hole 131, so that the light emitting range of the light passing hole 131 is smaller and more concentrated, that is, the edge of the projected light spot of the light emitting device 100 is brighter and clearer.

[0058] Please refer to Figure 2With the same plane as the plane where all the light emitting surfaces 111 are located as a reference plane, the smallest hole edge 132 of the light hole 131 projects a first orthographic projection 133 on the reference plane, and the light emitting surface of the first lens 120 projects a second orthographic projection 126 on the reference plane. The first orthographic projection 133 covers all the light emitting surfaces 111 and is located inside the second orthographic projection 126. Since the first orthographic projection 133 is between the outside of all the light emitting surfaces 111 and the inside of the second orthographic projection 126, it covers all the light emitting surfaces 111 and can cut off the edge area of the light emitting surface of the first lens 120 according to actual needs, thereby balancing the brightness and edge definition of the projected light spot.

[0059] The area of the first orthographic projection 133 is less than or equal to 80% of the area of the second orthographic projection 126, that is, the cutoff piece 130 cuts off at most 20% of the area of the second orthographic projection 126, in other words, the area of the cut-off edge area is at most 20% of the area of the second orthographic projection 126. In this embodiment, the area of the first orthographic projection 133 can be, but is not limited to, 80% of the area of the second orthographic projection 126, and the edge area of 20% of the area of the second orthographic projection 126 is cut off.

[0060] In this embodiment, the side surface of the cutoff piece 130 is coplanar with the side surface of the first lens 120, that is, the profile line of the side surface of the cutoff piece 130 and the profile line of the side surface of the first lens 120 are located on the same straight line, which facilitates laser cutting or metal cutting of the substrate 112, the first lens 120 and the cutoff piece 130 into a single device. In other embodiments, the side surface of the cutoff piece 130 can be located inside the side surface of the first lens 120.

[0061] In this embodiment, the cutoff piece 130 is ring-shaped, but its shape is not limited thereto. The cutoff piece 130 can be bonded to the top surface of the support portion 122, and its material can be, but is not limited to, a light-absorbing material, specifically a black material or a resin filled with black particles, but is not limited thereto. Light incident on the cutoff piece 130 is absorbed and cannot penetrate the cutoff piece 130. In alternative embodiments, the material of the cutoff piece 130 can be a highly reflective material, such as white resin or resin filled with highly reflective particles, but is not limited thereto. Light incident on the surface of the cutoff piece 130 can be reflected and cannot penetrate the cutoff piece 130.

[0062] The second lens 140 can be bonded on the top surface of the cutoff member 130 to shape the light emitted from the light passing hole 131. In the embodiment, the side surface of the second lens 140 is arranged in the same plane as the side surface of the cutoff member 130, that is, the profile line of the side surface of the cutoff member 130 and the profile line of the side surface of the first lens 120 are in the same straight line. Therefore, the side surfaces of all the elements of the light emitting device 100 are arranged in the same plane, and the plurality of light emitting devices 100 arranged in an integrated array can be first processed, and then the single light emitting device 100 can be cut by laser or metal cutting. The production process has high production efficiency, relatively simple process, and reduced production cost.

[0063] In the embodiment, the second lens 140 is a convex lens, which plays a role of secondary light condensation. The light spot projected by the second lens 140 has higher brightness and clearer edge.

[0064] The second lens 140 is a plano-convex lens, the bottom surface of which is flat and bonded on the top surface of the cutoff member 130, and the top surface of which is convex. The edge of the light emitting surface of the second lens 140 can be set according to the size of the smallest hole edge 132 of the light passing hole 131, for example, the edge of the light emitting surface of the second lens 140 can be greater than or equal to the smallest hole edge 132 of the light passing hole 131.

[0065] Please refer to Figure 2 In the embodiment, the substrate 112 has only one LED chip, and the area of the first orthographic projection 133 is equal to 80% of the area of the second orthographic projection 126. When the area of the first orthographic projection 133 is the smallest, the boundary thereof is inscribed in the boundary of the light emitting surface 111; when the area of the first orthographic projection 133 is the largest, the boundary thereof is located in the boundary of the second orthographic projection 126. It should be noted that in other embodiments, the substrate 112 can have a plurality of LED chips, which can include red light chips, green light chips and blue light chips, but are not limited thereto. The smallest hole edge 132 of the light passing hole 131 is arranged corresponding to the plurality of LED chips, so that the first orthographic projection 133 covers the light emitting surface 111 of all the LED chips and is located in the second orthographic projection 126.

[0066] In the embodiment, the lens part 124 of the first lens 120 and the light passing hole 131 are both circular, but the shape is not limited thereto. In other embodiments, the lens part 124 of the first lens 120 and the light passing hole 131 can both be square.

[0067] Please refer to Figure 3 , Figure 3The sectional view of the light emitting device in the second embodiment of the present application is shown. Compared with the light emitting device 100 in the first embodiment, the light emitting component 110 of the light emitting device 100 in the present embodiment uses a support 114 instead of the substrate 112. The support 114 is provided with a mounting groove 115, the light emitting chip 113 is arranged in the mounting groove 115, and the first lens 120 is arranged on the top surface of the support 114. The side surface of the mounting groove 115 is arranged in a diverging manner in the light emitting direction of the optical axis, which plays a role of reflecting light towards the lens part 124, and is beneficial to improving the light extraction efficiency.

[0068] In the present embodiment, the side surface of the first lens 120 is arranged coplanarly with the side surface of the support 114, i.e. the sectional line of the side surface of the first lens 120 and the sectional line of the side surface of the support 114 are located on the same straight line.

[0069] The support 114 includes a base 116 and a conductive structure 117. The edge of the conductive structure 117 is embedded in the bottom of the base 116, which encloses the mounting groove 115. The conductive structure 117 forms the groove bottom of the mounting groove 115, and the base 116 forms the side surface of the mounting groove 115. The conductive structure 117 includes a first part 118 and a second part 119 arranged in a spaced manner. The light emitting chip 113 is arranged on the first part 118, and the electrode on the top surface of the light emitting chip 113 is electrically connected to the second part 119 through a bonding wire (not shown). The bottom surface of the support part 122 of the first lens 120 is supported on the top surface of the base 116.

[0070] In the present embodiment, the light passing hole 131 of the cutoff piece 130 is arranged in a diverging manner in the light emitting direction of the optical axis, i.e. the light inlet of the light passing hole 131 is smaller than the light outlet.

[0071] In the present embodiment, the side surface of the cutoff piece 130 and the side surface of the second lens 140 are arranged coplanarly with the side surface of the first lens 120, i.e. the side surfaces of all the elements of the light emitting device 100 are arranged coplanarly. In production, the plurality of light emitting devices 100 in integrated array distribution can be processed first, and then the single light emitting device 100 is cut by laser or metal cutting. The production efficiency of this production process is high, the process is relatively simple, and the production cost is reduced.

[0072] As for other aspects of the light emitting device 100 in the present embodiment, they are basically the same as those of the light emitting device 100 in the first embodiment described above, and the specific content can be referred to the description of the first embodiment, which will not be repeated here.

[0073] Please refer to Figure 4 , Figure 4The sectional view of the light emitting device in the third embodiment of the present application is shown. Compared with the light emitting device 100 in the first embodiment described above, the top end of the support part 122 of the first lens 120 in the light emitting device 100 in the present embodiment is supported on the lens part 124 thereof, instead of being supported on the cutoff part 130. In other words, the support part 122 is supported on the light emitting component 110, the lens part 124 is arranged at the top end of the support part 122, and the cutoff part 130 is arranged on the top surface of the lens part 124. The structure of the first lens 120 is relatively simple and easy to process and form, which is conducive to reducing the processing cost.

[0074] In the present embodiment, the light emitting surface of the first lens 120 is a convex curved surface, i.e., the lens part 124 of the first lens 120 is a convex lens, which plays a role of light condensation and can improve the brightness of the projected light spot and the definition of the edge of the light spot of the light emitting device 100. Specifically, but not limited to, the lens part 124 can be a plano-convex lens, and the first lens 120 can be first formed by a mold and then fixed on the substrate 112.

[0075] In order to avoid the interference of the light emitting surface of the first lens 120 with the placement of the cutoff part 130, the cutoff part 130 is of an integrated structure and includes an avoiding part 134 and a cutoff part 135, the light passing hole 131 is arranged on the cutoff part 135, and the avoiding part 134 is supported between the top surface of the first lens 120 and the cutoff part 135 to provide an avoiding space for the light emitting surface of the first lens 120. It should be noted that the top surface of the first lens 120 includes the light emitting surface and the edge region outside the light emitting surface, and the avoiding part 134 is supported on the edge region of the first lens 120. The bottom surface of the avoiding part 134 can be attached to the edge region. In other embodiments, the cutoff part 130 can be of a split structure, and the cutoff part 135 thereof can be attached to the top end of the support part 122.

[0076] As for other aspects of the light emitting device 100 in the present embodiment, they are basically the same as those of the light emitting device 100 in the first embodiment described above, and the specific content can be referred to the description of the first embodiment, which will not be repeated here.

[0077] Please refer to Figure 5 , Figure 5 The sectional view of the light emitting device in the fourth embodiment of the present application is shown. Compared with the light emitting device 100 in the third embodiment described above, the light emitting component 110 of the light emitting device 100 in the present embodiment is replaced by a bracket 114, the bracket 114 is provided with a mounting groove 115, the light emitting chip 113 is arranged in the mounting groove 115, and the first lens 120 is arranged on the top surface of the bracket 114. Specifically, the side surface of the mounting groove 115 is arranged in a diverging manner in the light emitting direction of the optical axis, which plays a role of reflecting light towards the lens part 124 and is conducive to improving the light extraction efficiency.

[0078] The support 114 comprises a base 116 and a conductive structure 117, the edge of the conductive structure 117 is embedded in the bottom of the base 116, and the conductive structure 117 forms the bottom of the mounting groove 115, and the base 116 forms the side of the mounting groove 115. The conductive structure 117 comprises a first part 118 and a second part 119 arranged at intervals, the light emitting chip 113 is arranged on the first part 118, and the electrode on the top surface of the light emitting chip 113 is electrically connected to the second part 119 through a bonding wire (not shown).

[0079] The first lens 120 has no support part 122, and the bottom surface thereof is directly supported on the top surface of the base 116, so that the structure of the first lens 120 is further simplified. In the embodiment, the first lens 120 can be but is not limited to a plano-convex lens, the plane of which is arranged on the top surface of the support 114, and the convex curved surface thereof corresponds to the arrangement of the cutoff part 130.

[0080] As for other aspects of the light emitting device 100 in the embodiment, they are basically the same as those of the light emitting device 100 in the third embodiment described above, and the specific content can be referred to the description of the third embodiment, which will not be repeated here.

[0081] Please refer to Figure 6 and Figure 7 , Figure 6 shows a cross-sectional view of the light emitting device in the fifth embodiment of the present application, Figure 7 shows Figure 6 a front projection view of the light emitting surface of the light emitting assembly of the light emitting device in the fifth embodiment, the minimum hole edge of the light transmission hole and the light emitting surface of the second lens, compared with the light emitting device 100 in the first embodiment, the second lens 140 in the light emitting device 100 in the embodiment is arranged on the first lens 120, and the cutoff part 130 is arranged on the second lens 140, and the cutoff part 130 is configured to at least cut off the edge light emission of the light emitting surface of the second lens 140.

[0082] By disposing the cutoff piece 130 on the second lens 140, the light passing hole 131 of the cutoff piece 130 can pass most of the light emitted by the light emitting surface of the second lens 140, so that the cutoff piece 130 can at least cut off the edge light emission of the light emitting surface of the second lens 140 to redefine the projection light spot of the light emitting device 100, the edge of the projection light spot is clear, there is no transition shadow from bright to dark, and the uniformity of the light spot is good. Secondly, because the cutoff piece 130 will inevitably cut off part of the light emission of the light emitting chip 113, the first lens 120 does not need to completely cover the light emission angle range of the light emitting chip 113, and the volume of the first lens 120 is reduced. The second lens 140 is adapted to the first lens 120, and the cutoff piece 130 is adapted to the second lens 140, so that the volume of the entire light emitting device 100 is significantly reduced, which is beneficial to the miniaturization of the light emitting device 100 and increases the application scenarios of the light emitting device 100. In addition, the second lens 140 can perform secondary shaping on the light emitted from the light passing hole 131, thereby enhancing the light control ability of the light emitting device 100 to meet the needs of users for different light types.

[0083] In the embodiment, the first lens 120 and the second lens 140 are both convex lenses, and the light emission of the light emitting chip 113 is twice focused. The cutoff piece 130 processes the light after the secondary focusing, so that the light spot projected by the light emitting device 100 has better brightness and the edge of the light spot is clearer.

[0084] In the embodiment, the second lens 140 is a plano-convex lens, the bottom surface thereof is planar, and the top surface thereof is attached to the top surface of the support portion 122 of the first lens 120. The light emitting portion of the top surface thereof is a convex curved surface.

[0085] Please combine Figure 7 With the same plane where all the light emitting surfaces 111 are located as a reference plane, the smallest hole edge 132 of the light passing hole 131 is projected on the reference plane to form a third orthographic projection 136, and the light emitting surface of the second lens 140 is projected on the reference plane to form a fourth orthographic projection 142. The third orthographic projection 136 covers all the light emitting surfaces 111 and is located inside the fourth orthographic projection 142. Because the third orthographic projection 136 is between the outside of all the light emitting surfaces 111 and the inside of the fourth orthographic projection 142, it covers all the light emitting surfaces 111 and can cut off the edge region of the light emitting surface of the second lens 140 according to actual needs, thereby balancing the brightness and edge clarity of the projection light spot.

[0086] The area of the third orthogonal projection 136 is less than or equal to 80% of the area of the fourth orthogonal projection 142, that is, the cut-off piece 130 cuts off at most 20% of the area of the fourth orthogonal projection 142, in other words, the area of the cut-off edge region is at most 20% of the area of the fourth orthogonal projection 142. In the embodiment, the area of the third orthogonal projection 136 can be, but is not limited to, 80% of the area of the fourth orthogonal projection 142, and the edge region accounting for 20% of the area of the fourth orthogonal projection 142 is cut off.

[0087] The cut-off piece 130 is an integral structure and includes the cut-off portion 135 and the avoiding portion 134. The light passing hole 131 is formed on the cut-off portion 135, and the avoiding portion 134 is supported between the top surface of the second lens 140 and the cut-off portion 135 to provide an avoiding space for the light emitting surface of the second lens 140. It should be noted that the top surface of the second lens 140 includes the light emitting surface and an edge region outside the light emitting surface, and the avoiding portion 134 is supported on the edge region of the second lens 140. The bottom surface of the avoiding portion 134 can be attached to the edge region by adhesion.

[0088] Please refer to Figure 7 In the embodiment, only one LED chip is provided on the substrate 112, and the area of the third orthogonal projection 136 is equal to 80% of the area of the fourth orthogonal projection 142. When the area of the third orthogonal projection 136 is the smallest, the boundary thereof is inscribed in the boundary of the light emitting surface 111; when the area of the third orthogonal projection 136 is the largest, the boundary thereof is located within the boundary of the fourth orthogonal projection 142. It should be noted that in other embodiments, a plurality of LED chips can be provided on the substrate 112, which can include red light chips, green light chips and blue light chips, but are not limited thereto; and the smallest hole edge 132 of the light passing hole 131 is provided corresponding to the plurality of LED chips, so that the third orthogonal projection 136 covers the light emitting surface 111 of all the LED chips and is located inside the fourth orthogonal projection 142.

[0089] In the embodiment, the side surface of the light emitting assembly 110 (the substrate 112), the side surface of the first lens 120 and the side surface of the second lens 140 are coplanar, which facilitates laser cutting or metal cutting of the light emitting assembly 110, the first lens 120 and the second lens 140 as single devices.

[0090] Further, the side surface of the cut-off piece 130 is coplanar with the side surface of the second lens 140, that is, the side surfaces of all the elements of the light emitting device 100 are coplanar. In production, the plurality of light emitting devices 100 in integrated array distribution can be first processed, and then the single light emitting device 100 is laser cut or metal cut. The production process has high production efficiency and relatively simple process, thereby reducing production cost.

[0091] In the embodiment, the second lens 140 and the light passing hole 131 are circular, but the shape is not limited thereto.

[0092] As other aspects of the light emitting device 100 in the present embodiment are substantially the same as those of the light emitting device 100 in the above first embodiment, the specific contents can be referred to the description of the above first embodiment, which will not be repeated here.

[0093] Please refer to Figure 8 , Figure 8 The cross-sectional view of the light emitting device in the sixth embodiment of the present application is shown. Compared with the light emitting device 100 in the above fifth embodiment, the light incident surface of the second lens 140 in the light emitting device 100 in the present embodiment is a convex curved surface, and the top surface of the second lens 140 is a planar surface, so that the cut-off piece 130 does not need to be provided with the avoiding part 134, and the bottom surface of the cut-off piece 130 can be directly attached to the top surface of the second lens 140.

[0094] In the present embodiment, the cut-off piece 130 is annular, and the light passing hole 131 is a circular hole. However, the shapes of the cut-off piece 130 and the light passing hole 131 are not limited thereto. In other embodiments, the cut-off piece 130 can be a cut-off layer, which can be attached to the top surface of the second lens 140 by coating or bonding.

[0095] As other aspects of the light emitting device 100 in the present embodiment are substantially the same as those of the light emitting device 100 in the above fifth embodiment, the specific contents can be referred to the description of the above fifth embodiment, which will not be repeated here.

[0096] The technical features of the above embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0097] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A light-emitting device, characterized in that, include: A light-emitting component (110) having at least one light-emitting surface (111). A first lens (120) is disposed on the light-emitting component (110), and the light-incident surface of the first lens (120) is disposed above all the light-emitting surfaces (111); A cut-off element (130) is provided on the first lens (120) and has a light-passing hole (131). The cut-off element (130) is configured to at least cut off the edge of the light-emitting surface of the first lens (120) to emit light. as well as The second lens (140) is disposed on the stop member (130) corresponding to the light-passing hole (131).

2. The light-emitting device according to claim 1, characterized in that, Using the same plane where all the light-emitting surfaces (111) are located as the reference plane, the minimum aperture edge (132) of the light-passing hole (131) is projected onto the reference plane to form a first orthographic projection (133), and the light-emitting surface of the first lens (120) is projected onto the reference plane to form a second orthographic projection (126). The first orthographic projection (133) covers all the light-emitting surfaces (111) and is located inside the second orthographic projection (126).

3. The light-emitting device according to claim 1, characterized in that, The first lens (120) is an integral structure and includes a support part (122) and a lens part (124). The support portion (122) is supported between the light-emitting component (110) and the stop member (130), and the lens portion (124) is disposed inside the support portion (122); or The support portion (122) is supported on the light-emitting component (110), the lens portion (124) is disposed at the top of the support portion (122), and the stop member (130) is disposed on the top surface of the lens portion (124).

4. The light-emitting device according to any one of claims 1 to 3, characterized in that, The light-emitting surface of the first lens (120) is a convex curved surface; The cut-off member (130) is an integral structure and includes a clearance part (134) and a cut-off part (135). The light-passing hole (131) is opened on the cut-off part (135). The clearance part (134) is supported between the top surface of the first lens (120) and the cut-off part (135), thereby providing clearance space for the light-emitting surface of the first lens (120).

5. The light-emitting device according to any one of claims 1 to 3, characterized in that, The light-emitting component (110) includes a substrate (112) and at least one light-emitting chip (113). The light-emitting chip (113) is disposed on the substrate (112), and the light-emitting surface (111) is formed on the light-emitting chip (113). The first lens (120) is disposed on the substrate (112), and the side surface of the substrate (112) and the side surface of the first lens (120) are coplanar; or The light-emitting component (110) includes a bracket (114) and at least one light-emitting chip (113). The bracket (114) has a mounting groove (115), the light-emitting chip (113) is disposed in the mounting groove (115), the light-emitting surface (111) is formed on the light-emitting chip (113), the first lens (120) is disposed on the top surface of the bracket (114), and the side surface of the bracket (114) and the side surface of the first lens (120) are coplanar.

6. The light-emitting device according to claim 5, characterized in that, At least one of the stop member (130) and the second lens (140) has its side surface coplanar with the side surface of the first lens (120).

7. A light-emitting device, characterized in that, include: A light-emitting component (110) having at least one light-emitting surface (111). A first lens (120) is disposed on the light-emitting component (110), and the light-incident surface of the first lens (120) is disposed above the light-emitting surface (111) at a distance. The second lens (140) is disposed on the first lens (120); as well as A cut-off element (130) is provided on the second lens (140) and has a light-passing hole (131). The cut-off element (130) is configured to at least cut off the edge of the light-emitting surface of the second lens (140) to emit light.

8. The light-emitting device according to claim 7, characterized in that, Using the same plane where all the light-emitting surfaces (111) are located as the reference plane, the minimum aperture edge (132) of the light-passing aperture (131) is projected onto the reference plane to form a third orthographic projection (136), and the light-emitting surface of the second lens (140) is projected onto the reference plane to form a fourth orthographic projection (142). The third orthographic projection (136) covers all the light-emitting surfaces (111) and is located inside the fourth orthographic projection (142).

9. The light-emitting device according to claim 7, characterized in that, The first lens (120) is an integral structure and includes a support part (122) and a lens part (124). The support part (122) is supported between the light-emitting component (110) and the second lens (140), and the lens part (124) is located inside the support part (122).

10. The light-emitting device according to any one of claims 7 to 9, characterized in that, The side of the light-emitting component (110), the side of the first lens (120), and the side of the second lens (140) are arranged on the same plane.

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