Light emitting structure and lighting device

Abstract

The utility model discloses a light emitting structure and a lighting device, the light emitting structure comprises a light source part, a reflecting part and a light transmitting part, and the light source part comprises a substrate and a light emitting element; the first opening and the second opening are formed in the two ends of the reflection body, the light source piece is arranged in the first opening, and the light transmitting piece is arranged in the second opening; the reflection main body comprises a first side wall, and the first side wall faces the light-emitting element; one part of light emitted by the light-emitting element is reflected by the first side wall and then is emitted from the first light emitting direction; and the other part of the light is refracted by the light transmitting piece and then is emitted from the second light emitting direction. In the light-emitting structure, light emitted by the light source part is processed by the reflecting part and the light-transmitting part and is emitted from the first light-emitting direction and the second light-emitting direction, so that the purpose of bidirectional light-emitting illumination is achieved; and the luminous flux in the first light emitting direction and the second light emitting direction can be controlled, and the glare phenomenon is reduced or even eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of bidirectional lighting, and in particular to a light emitting structure and a lighting device combining reflection and transmission light emitting. Background Art

[0002] Most of the spotlights on the market are downlights, which are installed on the ceiling, ceiling, wall or ceiling by hanging. The characteristics of these spotlights are that the light emitted by the light source is irradiated from top to bottom, and the lighting method is generally local accent lighting and free scattering. Since downlights are unidirectional and the light beam is relatively concentrated, they cannot well meet the lighting market's demand for both accent lighting and indirect lighting. Generally speaking, spotlights are often used for downward accent lighting, and an upward lighting fixture is added to achieve indirect lighting.

[0003] In order to achieve accent lighting and indirect lighting in a single lamp, the following optical structure processing is usually adopted: (1) Two light sources are used for light distribution, one of which is a COB light source and is equipped with a lens or a reflector cup to achieve accent lighting; the other light source is an SMD patch light source, which irradiates upward to achieve indirect lighting; but this light distribution structure requires additional cost for the light source component, and the implementation method is relatively complicated. (2) The light source component uses a single COB light source and a lens assembly to emit light from top to bottom, but this light distribution structure has low light output efficiency and requires a relatively complex lens assembly; and glare is prone to occur if the light emitted upward is not well controlled.

[0004] The prior art discloses a lens reflector cup, comprising a reflector cup body, a combined lens installed in the reflector cup body, and a lens connector installed on the combined lens; the combined lens comprises a first hemispherical lens and a second hemispherical lens, the first hemispherical lens is superimposed on the top of the second hemispherical lens, and the two are integrally formed; the second hemispherical lens has an LED lamp accommodating cavity; the LED lamp accommodating cavity is cylindrical, and a plurality of convex lenses are evenly distributed on the top plane of the LED lamp accommodating cavity. The light emitting structure of the lens reflector cup adjusts the refraction and reflection direction of the LED light source by improving the shape of the combined lens and the reflector cup. However, the light emitting structure only emits light in a single direction upward. Summary of the invention

[0005] In order to solve the above problems, the utility model provides a light emitting structure, in which the light emitted by the light source is processed by the reflective member and the light-transmitting member respectively, and is emitted from the first light emitting direction and the second light emitting direction, so as to achieve the lighting purpose of bidirectional light emitting; and the luminous flux in the first light emitting direction and the second light emitting direction can be controlled, so as to reduce or even eliminate the glare phenomenon, and realize the focused lighting and indirect lighting. The utility model also provides a lighting device including the light emitting structure.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The light emitting structure includes a light source, a reflector and a light transmitting member.

[0008] The light source comprises a substrate and a light emitting element arranged on the substrate;

[0009] The reflector comprises a reflective body and a first opening and a second opening provided at two ends of the reflective body, the light source is arranged in the first opening, and the light-transmitting member is arranged in the second opening;

[0010] The reflective body comprises a first side wall, and the first side wall faces the light emitting element;

[0011] The light emitted by the light emitting element has a portion thereof emitted from a first light emitting direction after being reflected by the first side wall, and another portion thereof emitted from a second light emitting direction after being refracted by the light-transmitting component.

[0012] As a further improvement of the technical solution, the first light emitting direction is opposite to the second light emitting direction, or the first light emitting direction and the second light emitting direction have an angle.

[0013] As a further improvement of the technical solution, the light emitting element has a light emitting surface, and the first opening has a first end surface;

[0014] The light emitting surface is flush with the first end surface, or the light emitting surface is lower than the first end surface.

[0015] As a further improvement of the technical solution, the first side wall is a total reflection surface; in the cross section, the first side wall is a parabola, and the parabola focus of the parabola coincides with the light-emitting center of the light-emitting element.

[0016] As a further improvement of the technical solution, the light emitting center of the light emitting element and the light transmission center of the light transmitting member are located on the same central axis; the symmetry axis of the parabola passes through the focus of the parabola and is parallel to the central axis.

[0017] As a further improvement of the technical solution, the first side wall is electroplated with a mirror aluminum layer, or the first side wall is sprayed with a reflective paint layer, or the first side wall is affixed with a reflective film or reflective paper.

[0018] As a further improvement of the technical solution, the first side wall is provided with a total reflection microstructure, the total reflection microstructure is a grid pattern arranged in an array, and the grid pattern is a strip, oval, circle, triangle, rectangle, pentagon or hexagon;

[0019] The reflective body further includes a second side wall, and the second side wall and the first side wall extend outwardly in a direction away from the light source at the first opening to form a convex edge.

[0020] As a further improvement of the technical solution, the light-transmitting member includes a first light-transmitting portion and a second light-transmitting portion, the first light-transmitting portion is a columnar body, and the second light-transmitting portion is an arc-shaped body; the first light-transmitting portion is embedded and installed in the second opening, and the second light-transmitting portion protrudes from the second opening.

[0021] As a further improvement of the technical solution, it also includes a connecting arm, which is arranged in a straight line on the first opening, and the light source is arranged in the middle of the connecting arm.

[0022] The utility model also provides a lighting device, comprising the above-mentioned light emitting structure.

[0023] Based on the above technical solution, the technical effects achieved by the utility model are:

[0024] 1. The light-emitting structure provided by the utility model is a structure in which a part of the light emitted from the light-emitting element is reflected by the first side wall of the emitting component and then emitted from the first light-emitting direction through the first opening, and the other part is refracted / transmitted by the light-transmitting component and then emitted from the second light-emitting direction through the second opening, thereby realizing two-way light emission and meeting the lighting needs of accent lighting and indirect lighting.

[0025] 2. In the light-emitting structure of the present invention, all the light emitted by the light-emitting element is reflected or refracted before being emitted to the outside, which can ensure the controllability of the light, prevent direct light from entering the human eye, and reduce and avoid glare.

[0026] 3. The lighting device of the utility model adopts a bidirectional light-emitting structure, which can control the light-emitting angles in two light-emitting directions, and the light-emitting efficiency is higher than 80%. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is an exploded view of the light emitting structure of the utility model.

[0028] Figure 2 It is a front view of the light output structure of the utility model.

[0029] Figure 3 It is a cross-sectional view of the light output structure of the utility model.

[0030] Figure 4 It is a structural schematic diagram of a light emitting structure provided with a connecting arm of the utility model.

[0031] Figure 5 For the utility model Figure 4Section view along section line AA.

[0032] Figure 6 It is a schematic diagram of the light path of the light output structure of the utility model. DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively in conjunction with the accompanying drawings and specific embodiments. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0035] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0037] Example 1

[0038] Combined with reference Figure 1-Figure 6 A light emitting structure 100 includes a light source 1, a reflector 2 and a light-transmitting member 3, wherein the light emitted by the light source 1 is processed by the reflector 2 and the light-transmitting member 3 and then emitted from two directions, respectively, to meet the lighting requirements of accent lighting and indirect lighting. The light emitting structure 100 can be assembled in a lighting device such as a spotlight, a ceiling light or a downlight, and can be embedded or surface mounted, and is applied to lighting places such as restaurant lighting, shopping mall lighting or home lighting.

[0039] The light source component 1 includes a substrate 11 and a light-emitting element 12 . The light-emitting element 12 is an LED light-emitting lamp bead, which can be fixed on the substrate 11 by welding.

[0040] The light source 1 may be an SMD light source or a COB light source. In some embodiments, when the light source 1 is an SMD light source, the light emitting element 12 is an SMD light emitting chip, which is a positive chip that needs to be wire bonded, and is welded to the substrate 11 under the support of the bracket for packaging. The substrate 11 is an aluminum substrate or a glass fiber substrate, which is used to fix the light emitting element 12. The thickness and shape of the substrate 11 can be cut according to the assembly requirements. The light emitting element 12 can be welded and fixed on the substrate 11 in a single ring, multiple rings, cluster or cluster form.

[0041] In some embodiments, when the light source 1 is a COB light source, the light emitting element 12 is a single COB light emitting chip, which is packaged and attached to the substrate 11 in a conductive or non-conductive manner, and then mechanically wire bonded to achieve electrical connection. The substrate 11 is a ceramic substrate or a mirror aluminum substrate, and the thickness and shape of the substrate 11 can also be cut according to assembly requirements. In this embodiment, the light source 1 uses a COB light source in which the light emitting element 12 is a single COB light emitting chip. The light emitting element 12 has a light emitting surface 120.

[0042] The reflector 2 and the light-transmitting member 3 are both arranged in the light-emitting direction of the light-emitting element 12. The reflector 2 includes a reflective body 20, a first opening 21, and a second opening 22. The first opening 21 and the second opening 22 are respectively opened at the upper end and the lower end of the reflective body 20. The reflector 2 of this embodiment has a bowl-shaped structure, and the first opening 21 and the second opening 22 both have a circular structure; the diameter of the first opening 21 is greater than the diameter of the second opening 22. The light source 1 can be installed in the first opening 21 through the connecting arm 4, and the light-transmitting member 3 is embedded and installed in the second opening 22.

[0043] like Figure 4 and Figure 5 As shown, in some embodiments, the light emitting structure 100 is provided with a connecting arm 4 on the first opening 21 of the reflector 2, and the connecting arm 4 has a straight-line structure, and can be a straight-line plate or block. The light source component 1 is arranged in the middle of the connecting arm 4, and the two ends of the connecting arm 4 are connected to the lamp body (not shown in the figure). The connecting arm 4 can adopt a heat pipe made of copper or aluminum metal, or other rigid materials with high thermal conductivity. On the one hand, the connecting arm acts as a bracket to fix the light source component 1 on the lamp body; on the other hand, the heat generated by the light source component 1 can be conducted to the lamp body and the outside of the lamp body.

[0044] The reflective body 20 includes a first side wall 201 and a second side wall 202. The first side wall 201 is an inner side wall facing the light emitting element 12. The first side wall 201 is a side wall with a reflective function, and is used to reflect the light emitted by the light emitting element 12. The second side wall 202 is an outer side wall, and the second side wall 202 is away from the light emitting element 12.

[0045] The light emitted by the light emitting element 12 has a portion reflected by the first side wall 201 of the reflector 2 and emitted from the first light emitting direction L1 ; another portion of the light is refracted by the light transmitting element 3 and emitted from the second light emitting direction L2 .

[0046] In some embodiments, the light emitting element 12 emits light vertically downward, and after being reflected by the first side wall 201, the light is emitted from the first light emitting direction L1 facing upward; after being refracted by the light-transmitting member 3, the light is emitted from the second light emitting direction L2 facing downward. At this time, both the reflected light and the refracted light are collimated light, and the first light emitting direction L1 is opposite to the second light emitting direction L2; or in other words, the first light emitting direction L1 deviates from the second light emitting direction L2.

[0047] In some embodiments, after the light is reflected by the first side wall 201, it is emitted from the first light emitting direction L1; the emitted light beam is not collimated, but is tilted to have a first angle with the central axis; and after the light is refracted by the light-transmitting member 3, it is emitted from the second light emitting direction L2; the emitted light beam is not collimated, but is tilted to have a second angle with the central axis. In this way, a light emitting angle is formed between the first light emitting direction L1 and the second light emitting direction L2.

[0048] In some embodiments, if the light emitting element 12 emits light horizontally to the left, the first light emitting direction L1 is toward the right, and the second light emitting direction L2 is toward the left; if the light emitting element 12 emits light horizontally to the right, the first light emitting direction L1 is toward the left, and the second light emitting direction L2 is toward the right.

[0049] In other embodiments, the light emitting element 12 emits light in an inclined downward manner at an angle to the central axis, and the first light emitting direction L1 is obliquely upward, and the second light emitting direction L2 is obliquely downward. The specific light emitting direction and light emitting direction of the light emitting structure 100 can be selected according to the lighting angle and lighting range of the accent lighting and indirect lighting.

[0050] Further references Figure 2The light emitting element 12 of this embodiment adopts a single COB light emitting chip, and the light emitting surface 120 formed by the light emitting element 12 is a light emitting plane. The first opening 21 of the reflector 2 has a first end face 210, and the first end face 210 is also a plane. In the light emitting structure 100 of this embodiment, the light emitting surface 120 is flush with the first end face 210, that is, the light emitting surface 120 and the first end face 210 are located on the same plane, which ensures that all the light emitted by the light emitting element 12 enters the cavity 24 of the reflector 2, and part of these light rays are reflected by the first side wall and then reflected back and then emitted from the first opening 21, and part of them are refracted by the light-transmitting element 3 and then emitted from the second opening, thereby ensuring the controllability of the light, preventing the light emitted by the light emitting element 12 from directly entering the human eye, and avoiding direct glare.

[0051] In some embodiments, the light emitting surface 120 may also be set lower than the first end surface 210, so that all the light emitted by the light emitting element 12 can enter the cavity 24 and then be emitted to the outside after light control processing by reflection or refraction.

[0052] The first side wall 201 of the reflective body 20 is a total reflection surface. In the cross section, the first side wall 201 is a parabola. The light transmission center o of the light-transmitting member 3 is taken as the origin, the axis passing through the light-emitting center m of the light-emitting element 12 and the light transmission center o of the light-transmitting member 3 is taken as the y-axis, and the axis passing through the light transmission center o and perpendicular to the y-axis is taken as the x-axis. The parabolic function of the first side wall 201 conforms to the x 2 =2py(p>0), the parabola focus of the parabola coincides with the light emitting center m of the light emitting element 12; and the light emitting center m of the light emitting element 12 and the light transmitting center m of the light transmitting member 3 are located on the same central axis t. The symmetry axis of the parabola passes through the parabola focus and is parallel to the central axis t.

[0053] The material of the reflector 2 can be aluminum, glass or PC (polycarbonate). When aluminum is used as the material, a spinning process or a stamping process is used to prepare a reflector 2 with a bowl-shaped structure. When PC is used as the material, an injection molding process is used to prepare a reflector 2 with a bowl-shaped structure. In some embodiments, the reflector 2 can be electroplated with a layer of mirror aluminum on the first side wall 201 for reflecting light, or a reflective paint layer can be sprayed on the first side wall 201, or a reflective film or reflective paper can be attached to the first side wall 201, thereby improving the reflection performance of the first side wall 201. In other embodiments, the first side wall 201 can be provided with a total reflection microstructure, which is a grid pattern arranged in an array. The total reflection microstructure can be integrally injection molded with the reflective body 20 made of PC. The shape of the grid pattern of the total reflection microstructure can be strip, elliptical, circular, triangular, rectangular, pentagonal or hexagonal, and these grid patterns serve as reflection units to reflect the light entering the first side wall 201 and improve the reflection performance of the first side wall 201.

[0054] The second side wall 202 on the outside and the first side wall 201 on the inside extend outwardly at the first opening 21 in a direction away from the light source 1 to form a flange 25 having an annular structure for connecting with the lamp body or other lamp components.

[0055] The light-transmitting member 3 refracts or transmits the incoming light, so that the light is emitted from the second light-emitting direction L2. The light-transmitting member 3 includes a first light-transmitting portion 31 and a second light-transmitting portion 32, wherein the first light-transmitting portion 31 is a columnar body, the second light-transmitting portion 32 is an arc-shaped body, and the first light-transmitting portion 31 and the second light-transmitting portion 32 are an integrated structure. The light-transmitting member 3 is embedded and installed in the second opening 22 through the first light-transmitting portion 31.

[0056] The light-transmitting member 3 refracts the incoming light to control the light, and its material can be PC, PMMA or glass. In terms of lens type, the light-transmitting member 3 can be a convex lens or a concave lens. When the light-transmitting member 3 is a convex lens, the second light-transmitting portion 32 protrudes from the second opening 22; after the light is processed by the convex lens, the light output angle becomes smaller, and the concentrated light is used for key lighting.

[0057] In the cross section or profile of the light emitting structure, the light emitting center m of the light emitting element 12 forms an angle θ with the end of the first light transmitting portion 31. The larger the angle θ, the larger the curvature of the second light transmitting portion 32, the larger the proportion of light emitted from the second light emitting direction L2, and the smaller the proportion of light emitted from the first light emitting direction L1. The smaller the angle θ, the smaller the curvature of the second light transmitting portion 32, the smaller the proportion of light emitted from the second light emitting direction L2, and the larger the proportion of light emitted from the first light emitting direction L1.

[0058] When the light-transmitting element 3 is a concave lens, the light output angle becomes larger after being processed by the concave lens, and the light is divergent, which can be used for large-angle lighting or basic lighting.

[0059] In the light-emitting structure of the present embodiment, a part of the light emitted from the light-emitting element is reflected by the first side wall of the emitting component and then emitted from the first light-emitting direction, and the other part is refracted / transmitted by the light-transmitting component and then emitted from the second light-emitting direction, thereby realizing two-way light emission and meeting the lighting requirements of accent lighting and indirect lighting; and since all the light is reflected or refracted before being emitted to the outside, the controllability of the light can be ensured, direct light can be prevented from directly entering the human eye, and glare can be reduced and avoided.

[0060] Example 2

[0061] The light emitting structure of this embodiment is also provided with a diffusion plate or a polarizing plate at the first opening 21, so as to scatter or deflect the light emitted from the first opening 21, so that the light emitting direction will slightly deviate from the first light emitting reverse direction L1. The structure of the remaining components is basically the same as the light emitting structure of embodiment 1, and will not be described in detail here. The light emitting structure of this embodiment can also realize bidirectional light emission by using a single COB light emitting chip, and the light emitting angle can be adjusted.

[0062] Example 3

[0063] This embodiment provides a lighting device, including the bidirectional light emitting structure of the above-mentioned embodiment 1 or embodiment 2. The lighting device can control the light emitting angles in two light emitting directions to make the light emitting efficiency higher than 80%.

[0064] The above contents are merely examples and illustrations of the structure of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these obvious replacement forms all belong to the protection scope of the utility model.

Claims

1. A light emitting structure, characterized in that: Including light source parts, reflective parts and light-transmitting parts, The light source comprises a substrate and a light emitting element arranged on the substrate; The reflector comprises a reflective body and a first opening and a second opening opened at two ends of the reflective body, the light source is arranged in the first opening, and the light-transmitting member is arranged in the second opening; The reflective body comprises a first side wall, and the first side wall faces the light emitting element; The light emitted by the light emitting element has a portion thereof emitted from a first light emitting direction after being reflected by the first side wall, and another portion thereof emitted from a second light emitting direction after being refracted by the light-transmitting component.

2. The light output structure according to claim 1, characterized in that: The first light emitting direction is opposite to the second light emitting direction, or the first light emitting direction and the second light emitting direction have an included angle.

3. The light output structure according to claim 1, characterized in that: The light emitting element has a light emitting surface, and the first opening has a first end surface; The light emitting surface is flush with the first end surface, or the light emitting surface is lower than the first end surface.

4. The light output structure according to claim 1, characterized in that: The first side wall is a total reflection surface; in a cross section, the first side wall is a parabola, and the parabola focus of the parabola coincides with the light-emitting center of the light-emitting element.

5. The light output structure according to claim 4, characterized in that: The light emitting center of the light emitting element and the light transmitting center of the light transmitting member are located on the same central axis; the symmetry axis of the parabola passes through the focus of the parabola and is parallel to the central axis.

6. The light output structure according to claim 4, characterized in that: The first side wall is electroplated with a mirror aluminum layer, or the first side wall is sprayed with a reflective paint layer, or the first side wall is pasted with a reflective film or reflective paper.

7. The light output structure according to claim 4, characterized in that: The first side wall is provided with a total reflection microstructure, the total reflection microstructure is a grid pattern arranged in an array, and the grid pattern is a strip, oval, circle, triangle, rectangle, pentagon or hexagon; The reflective body further includes a second side wall, and the second side wall and the first side wall extend outwardly in a direction away from the light source at the first opening to form a convex edge.

8. The light output structure according to claim 1, characterized in that: The light-transmitting member includes a first light-transmitting portion and a second light-transmitting portion, the first light-transmitting portion is a columnar body, and the second light-transmitting portion is an arc-shaped body; the first light-transmitting portion is embedded and installed in the second opening, and the second light-transmitting portion protrudes from the second opening.

9. The light output structure according to claim 1, characterized in that: It also includes a connecting arm, which is arranged in a straight line on the first opening, and the light source is arranged in the middle of the connecting arm.

10. A lighting device, characterized in that: It comprises the light emitting structure described in any one of claims 1 to 9.

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