Illuminating device capable of lighting uniformly

Abstract

The utility model relates to the technical field of optical lighting, and discloses a lighting device capable of lighting uniformly, which comprises a light source module, a condensation device and a diffusion device, the light condensing device is provided with first light condensing curved surfaces which are bent at two opposite edges in a first dimension, the first light condensing curved surfaces are provided with positive focal power, and the first light condensing curved surfaces are used for condensing light at the edges in the first dimension; the diffusion device is provided with second condensation curved surfaces which are bent at two opposite edges in a second dimension, the second condensation curved surfaces are provided with positive focal power and are used for converging light rays at the edges in the second dimension, and the diffusion device is used for realizing diffuse reflection on the light rays passing through the condensation device; the first dimension is perpendicular to the second dimension, and the plane where the first dimension and the second dimension are located is perpendicular to the optical axis of the light source module. According to the utility model, two-dimensional regulation and control can be realized, so that the uniformity of luminous intensity in an effective lighting area is improved, and the energy consumption is reduced on the premise of ensuring the lighting effect.

Description

Technical Field

[0001] The utility model relates to the technical field of optical lighting, in particular to a lighting device with uniform lighting. Background Art

[0002] A lighting device is a device that provides light through artificial light sources. It is widely used in different scenarios such as home, business, industry, and public places. It can be divided into many different types according to different functions and usage scenarios.

[0003] The core component of a lighting device is a lamp bead or a light bulb. With the continuous progress and innovation of society, people's demand for the brightness of lighting devices is getting higher and higher. In related technologies, a plurality of lamp beads are usually arranged and combined into a lighting device. However, the brightness at the edge of the effective lighting area of ​​such a lighting device is insufficient, the light distribution is uneven, and the lighting effect is poor, which makes it difficult to meet the use requirements with high requirements for uniformity of luminous intensity.

[0004] Therefore, it is necessary to improve the existing technology.

[0005] The above information is presented as background information only to assist with understanding the present disclosure and no determination or admission is made as to whether any of the above may be used as prior art with respect to the present disclosure. Utility Model Content

[0006] The utility model provides a lighting device with uniform lighting, which can improve the luminous intensity of edge positions in all directions of an effective lighting area and distribute light uniformly, so as to solve the problems existing in the prior art.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A lighting device for uniform lighting, comprising a light source module, a condenser and a diffuser, wherein the condenser is arranged on the light-emitting surface side of the light source module, and the diffuser is arranged on the side of the condenser away from the light source module;

[0009] The focusing device is provided with a first focusing curved surface that is curved at two edges that are opposite to each other in a first dimension, the first focusing curved surface is provided with a positive optical focal length, and the first focusing curved surface is used to focus light emitted by the light source module at two edges that are opposite to each other in the first dimension;

[0010] The diffuser is provided with a second light-collecting curved surface curved at two edges opposite to each other in the second dimension, the second light-collecting curved surface is provided with a positive optical focal length, the second light-collecting curved surface is used to collect light at two edges opposite to each other in the second dimension after passing through the light-collecting device, and the diffuser is used to realize diffuse reflection of the light passing through the light-collecting device;

[0011] The first dimension is perpendicular to the second dimension, and the plane where the first dimension and the second dimension are located is perpendicular to the optical axis of the light source module.

[0012] In a possible implementation, the light source module includes a circuit board and a plurality of lamp beads, and all the lamp beads are arranged along the second dimension and installed on a side of the circuit board close to the focusing device.

[0013] In a possible implementation, the diffusion device is a special-shaped diffusion plate extending along the second dimension, and the second light-collecting curved surface is arranged on a side of the special-shaped diffusion plate away from the light-collecting device.

[0014] In a possible implementation, the second focusing curved surface includes a middle plane and two edge curved surfaces, the middle plane extends along the second dimension, the two edge curved surfaces are respectively connected to opposite ends of the middle plane, and the edge curved surfaces are provided with positive optical power.

[0015] In a possible implementation, the light focusing device is a light focusing rod, and the light focusing rod is a cylindrical structure extending along the second dimension.

[0016] In a possible implementation, the focusing device is a semi-cylindrical lens structure extending along the second dimension.

[0017] In a possible implementation manner, the lamp beads are light emitting diodes, and the distance between every two adjacent light emitting diodes is equal.

[0018] In a possible implementation, the light source module further includes a heat sink connected to a side of the circuit board away from the lamp beads.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The utility model provides a lighting device with uniform lighting. Through the cooperation of a focusing device and a diffusion device, the light emitted by a light source module can be controlled in two dimensions along a first dimension and a second dimension perpendicular to the optical axis. The first focusing curved surface with positive optical focal length can focus the light emitted by the light source module at two relatively edges in the first dimension, and the second focusing curved surface with positive optical focal length can focus the light at two relatively edges in the second dimension passing through the focusing device. The luminous intensity at the edge of the effective lighting area in the field of view of different dimensions can be effectively improved, thereby improving the uniformity of the luminous intensity in the effective lighting area, and ensuring that the luminous intensity at each position in the effective lighting area can effectively meet the actual lighting requirements. In addition, the diffusion component can also effectively realize diffuse reflection and uniform light for the final emitted light, further improving the uniformity of the luminous intensity distribution, thereby effectively improving the lighting effect. By improving the uniformity of the luminous intensity, energy consumption can be reduced while ensuring the lighting effect, which is energy-saving and environmentally friendly. The overall structure is simple, the number of optical elements is small, the structure is compact, and the cost of the device can be effectively controlled.

[0021] The present invention has other characteristics and advantages, which will be apparent from the accompanying drawings and subsequent specific embodiments incorporated herein, or will be described in detail in the accompanying drawings and subsequent specific embodiments incorporated herein, which together are used to explain the specific principles of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a graph of luminous intensity-viewing angle of a traditional lighting device;

[0024] Figure 2 It is a schematic diagram of the three-dimensional structure of the lighting device for uniform lighting provided by an embodiment of the utility model;

[0025] Figure 3 It is a schematic diagram of the three-dimensional structure of a lighting device for uniform lighting provided by another embodiment of the utility model;

[0026] Figure 4 It is a schematic cross-sectional structure diagram of a lighting device for uniform lighting provided by an embodiment of the utility model;

[0027] Figure 5 It is a schematic cross-sectional structure diagram of another dimension of the lighting device for uniform lighting provided by an embodiment of the utility model;

[0028] Figure 6 It is a luminous intensity-viewing angle curve diagram of the uniformly illuminated lighting device provided in an embodiment of the utility model.

[0029] Reference numerals:

[0030] Light source module 100, circuit board 110, lamp beads 120, heat sink 130;

[0031] Light concentrating device 200, first light concentrating curved surface 210;

[0032] Diffusing device 300 and second light-collecting curved surface 310 . DETAILED DESCRIPTION

[0033] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0034] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0035] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0036] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0037] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0038] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0039] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0040] In the description of the embodiments of the present application, space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the referred device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0041] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0042] Lighting devices are devices that provide light through artificial light sources. They are widely used in different scenarios such as homes, businesses, industries, and public places. They can be divided into many different types according to different functions and usage scenarios. The core components of lighting devices are lamp beads or bulbs. With the continuous progress and innovation of society, people's demand for lighting devices is also increasing. In order to improve the realization of different lighting needs such as linear or surface shapes.

[0043] In the related art, a plurality of lamp beads are usually arranged and combined to form a lighting device. However, the brightness at the edge of the effective lighting area of ​​such a lighting device is insufficient, the light distribution is uneven, and the lighting effect is poor, which makes it difficult to meet the use requirements with high requirements for uniformity of luminous intensity. Figure 1As shown, it can be seen that the luminous intensity at the edge position is significantly lower than that at the middle position, and the luminous intensity uniformity is low.

[0044] Although some lighting devices in the related art can improve the uniformity of luminous intensity to a certain extent, the structure of such lighting devices often has defects such as complex structure, high cost, and inconvenient installation. In addition, although some lighting devices can improve the uniformity of light spots to a certain extent, it is still difficult to achieve ideal lighting effects in certain dimensions.

[0045] In view of this, this patent aims to provide a lighting device with uniform lighting, which can improve the luminous intensity of the edge positions of the effective lighting area in all directions, and evenly distribute the light, which can solve the technical problem in the prior art that the uniformity of the effective lighting area cannot be improved.

[0046] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0047] Please refer to Figures 2 to 6 The embodiment of the utility model provides a lighting device with uniform lighting, including a light source module 100, a condenser 200 and a diffuser 300. The condenser 200 is arranged on the light-emitting surface side of the light source module 100, and the diffuser 300 is arranged on the side of the condenser 200 away from the light source module 100. Along the optical axis direction of the light source module 100, the projection of the condenser 200 on the light source module 100 surrounds the light-emitting surface of the light source module 100, and the projection of the diffuser component on the light source module 100 surrounds the light-emitting surface of the light source module 100. The light emitted by the light source module 100 passes through the condenser 200 and the diffuser 300 in sequence.

[0048] The focusing device 200 is provided with a first focusing curved surface 210 that is curved at two edges that are opposite to each other in a first dimension. The first focusing curved surface 210 is provided with a positive optical focal length. The first focusing curved surface 210 is used to focus the light emitted from the edges of the light source module 100 in two directions that are opposite to each other in the first dimension.

[0049] The diffuser 300 is provided with a second light-collecting curved surface 310 curved at two edges opposite to each other in the second dimension, the second light-collecting curved surface 310 is provided with a positive optical focal length, and the second light-collecting curved surface 310 is used to collect light at two edges opposite to each other in the second dimension after passing through the light-collecting device 200, and the diffuser 300 is used to realize diffuse reflection and uniform light for the light passing through the light-collecting device 200;

[0050] The first dimension is perpendicular to the second dimension, and the plane where the first dimension and the second dimension are located is perpendicular to the optical axis of the light source module 100 .

[0051] Through the cooperation of the focusing device 200 and the diffusion device 300, the light emitted by the light source module 100 can be controlled in two dimensions along the first dimension and the second dimension perpendicular to the optical axis. The first focusing surface 210 with positive optical focal length can converge the light emitted by the light source module 100 at the two relatively edges in the first dimension, and the second focusing surface 310 with positive optical focal length can converge the light passing through the focusing device 200 at the two relatively edges in the second dimension, which can effectively improve the luminous intensity at the edge of the effective lighting area in the field of view of different dimensions, thereby improving the uniformity of the luminous intensity in the effective lighting area, and ensuring that the luminous intensity at each position in the effective lighting area can effectively meet the actual lighting requirements; in addition, the diffusion component can also effectively realize diffuse reflection and uniform light for the final emitted light, which can further improve the uniformity of the luminous intensity distribution, thereby effectively improving the lighting effect, and by improving the uniformity of the luminous intensity, it is possible to reduce energy consumption while ensuring the lighting effect, save energy and protect the environment, and the overall structure is simple, the number of optical components is small, the structure is compact, and the cost of the device can be effectively controlled.

[0052] The luminous intensity-viewing angle curve corresponding to a uniform lighting device provided in the embodiment of the utility model is shown in FIG. Figure 6 As shown, it can be seen that the luminous intensity at the edge is obviously close to the luminous intensity at the middle, and the luminous intensity uniformity is high. Figure 1 The luminous intensity-field angle curve diagram of the traditional lighting device shown in the figure shows that the lighting device with uniform lighting provided by the embodiment of the utility model can effectively improve the uniformity of the luminous intensity of the effective lighting area.

[0053] It can be understood that the light source module 100 includes a circuit board 110 and a plurality of lamp beads 120 , and all the lamp beads 120 are arranged along the direction of the second dimension and installed on a side of the circuit board 110 close to the focusing device 200 .

[0054] It can be understood that the diffuser 300 is a special-shaped diffuser extending along the second dimension, and the second focusing curved surface 310 is arranged on the side of the special-shaped diffuser away from the focusing device 200. Since the surface is set as a curved second focusing curved surface 310 at the edge of the second dimension, it is a special-shaped diffuser. The diffuser, also known as a diffuse reflection plate, can be used to improve the uniformity of light source illumination. The principle is equivalent to adding a scattering plate in front of the visual light source to diffusely reflect the light when passing through, so as to reduce the directionality of the light source and enhance the uniformity of the illumination.

[0055] Specifically, the diffuser plate can be made of a material with good diffuse reflection properties, such as polytetrafluoroethylene. By utilizing the Lambertian properties of polytetrafluoroethylene and adding a small amount of carbon black, a standard reference plate with optical performance similar to that of a high reflection reference can be obtained.

[0056] It can be understood that the second focusing surface 310 includes a middle plane and two edge surfaces. The middle plane extends along the second dimension. The two edge surfaces are respectively connected to the opposite ends of the middle plane. Both edge surfaces are provided with positive optical focal length. The edge surfaces are used to converge light at the edges in two directions relative to each other in the second dimension after passing through the focusing device 200.

[0057] By setting the central area of ​​the second focusing surface 310 as the middle plane, the diffuser corresponding to the middle plane only realizes diffuse reflection of the light, which can effectively ensure that the light in the middle area of ​​the light spot finally formed by the lighting device is uniform. Only the second focusing surface 310 at both end areas of the second focusing surface 310 converges the light, so that the light outside the effective lighting area is collected and converged to the edge position of the effective lighting area, thereby improving the uniformity of the luminous intensity of the entire effective lighting area.

[0058] It can be understood that the focusing device 200 is a focusing rod, which is a cylindrical structure extending along the second dimension, and the first focusing curved surface 210 is the circumferential surface of the focusing rod. The focusing rod is a light-transmitting focusing structure that can focus the light from the edge area of ​​the light source module 100 in the first dimension, thereby improving the luminous intensity of the light spot finally formed at the edge of the first dimension, and can effectively improve the uniformity of the luminous intensity of the effective illumination area.

[0059] It is understandable that, in addition to being configured as a cylindrical structure, the focusing rod can also be configured as follows: the focusing device 200 is a semi-cylindrical lens structure extending along the second dimension, and the first focusing curved surface 210 is disposed on a side of the focusing device 200 away from the light source module 100 .

[0060] Specifically, the semi-cylindrical lens structure of the focusing device 200 may be an acrylic lens.

[0061] It is understandable that the lamp bead 120 is a light emitting diode, and the optical axis of the light source module 100 is parallel to the optical axis of the light emitting diode. Light emitting diode, referred to as LED, is a semiconductor device that converts electrical energy into light energy, and has the advantages of high efficiency, long life, fast response, and environmental protection. The distance between each two adjacent light emitting diodes is equal, which can effectively improve the uniformity of the light emitted by the light source module 100.

[0062] Understandably, reference Figure 3 As shown, the light source module 100 also includes a heat sink 130, which is connected to the side of the circuit board 110 away from the lamp bead 120. The heat sink 130 can be configured as an aluminum base with heat dissipation fins. The heat sink 130 can effectively improve the working performance of the lamp bead 120, thereby effectively preventing the lamp bead 120 from being affected by excessive temperature.

[0063] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concept of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A lighting device for uniform lighting, characterized in that: Comprising a light source module (100), a light concentrator (200) and a diffusion device (300), wherein the light concentrator (200) is arranged on the light-emitting surface side of the light source module (100), and the diffusion device (300) is arranged on a side of the light concentrator (200) away from the light source module (100); The light concentrator (200) is provided with a first light concentrating curved surface (210) curved at two edges opposite to each other in a first dimension, the first light concentrating curved surface (210) is provided with a positive optical focal length, and the first light concentrating curved surface (210) is used to converge light emitted by the light source module (100) at two edges opposite to each other in the first dimension; The diffusion device (300) is provided with a second light-collecting curved surface (310) curved at two edges opposite to each other in a second dimension, the second light-collecting curved surface (310) is provided with a positive optical focal length, the second light-collecting curved surface (310) is used to collect light at two edges opposite to each other in the second dimension after passing through the light-collecting device (200), and the diffusion device (300) is used to realize diffuse reflection of the light passing through the light-collecting device (200); The first dimension is perpendicular to the second dimension, and the plane where the first dimension and the second dimension are located is perpendicular to the optical axis of the light source module (100).

2. The uniform lighting device according to claim 1, characterized in that: The light source module (100) comprises a circuit board (110) and a plurality of lamp beads (120), and all of the lamp beads (120) are arranged along the second dimension and installed on a side of the circuit board (110) close to the light collecting device (200).

3. The uniform lighting device according to claim 2, characterized in that: The diffusion device (300) is a special-shaped diffusion plate extending along the second dimensional direction, and the second light-collecting curved surface (310) is arranged on a side of the special-shaped diffusion plate away from the light-collecting device (200).

4. The uniform lighting device according to claim 3, characterized in that: The second light-focusing curved surface (310) comprises a central plane and two edge curved surfaces, the central plane extends along the second dimensional direction, the two edge curved surfaces are respectively connected to opposite ends of the central plane, and the edge curved surfaces are provided with positive optical focal length.

5. The uniform lighting device according to claim 2, characterized in that: The light focusing device (200) is a light focusing rod, and the light focusing rod is a cylindrical structure extending along the second dimension.

6. The uniform lighting device according to claim 2, characterized in that: The light focusing device (200) is a semi-cylindrical lens structure extending along the second dimension.

7. The uniform lighting device according to claim 2, characterized in that: The lamp beads (120) are light emitting diodes, and the distance between any two adjacent light emitting diodes is equal.

8. The uniform lighting device according to claim 2, characterized in that: The light source module (100) further comprises a heat sink (130), wherein the heat sink (130) is connected to a side of the circuit board (110) away from the lamp bead (120).

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