OPTICAL ELEMENT AND LAMP

Abstract

 An optical element is provided. The optical element includes a lens part and a diffusion shell, wherein the lens part is provided with a plurality of lenses that are used to be respectively in one-to-one correspondence with lamp beads on a light source bar, each lens has a first end surface facing the lamp bead, the first end surface is provided with a concave cavity, the concave cavity is configured to accommodate at least one of the lamp beads; the diffusion shell is integrally formed with the lens part and located at a periphery of the lens part, and a peripheral edge of the diffusion shell is used to fixedly connect to a lamp disc. According to the optical element provided in the present application, the lens part and the diffusion shell are of an integral structure, which can prevent the lenses from falling off, and prolong the service life of a lamp. A lamp is further provided. The lamp includes a lamp disc, a light source bar provided on a front surface of the lamp disc, a light source driver provided on a back surface of the lamp disc, and the above optical element, wherein the light sour bar is provided with at least one row of lamp beads, and the light source driver is electrically connected to the light source bar.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of lamps, and more specifically relates to an optical element and a lamp.

BACKGROUND

[0002] At present, an optical component of a direct-light disc lamp or direct-light panel lamp commonly used in the market is usually composed of a lens made of a PMMA (Polymethyl methacrylate) material and a diffuser made of a PC (Polycarbonate) material, thereby achieving an optical effect of uniform light emission. The PMMA lens is fixed in an adhesion manner, after the lens is adhered, the diffuser is further needed and arranged to ensure the uniformity of light. The optical component composed of the PMMA lens and the diffuser occupies a relatively large space on the whole, resulting in a relatively large thickness of a lamp and affecting the use. Moreover, the PMMA lens has a risk of loosening and falling off due to failure of the adhesion during long-term use, which affects the service life of the lamp.

SUMMARY

[0003] An objective of the present application is to provide an optical element and a lamp, which aims to solve the problems that a lamp in the prior art is assembled by independently adhering lenses, an optical component occupies a large space, and the lens is easy to fall off.

[0004] To achieve the above objective, the present application adopts the following technical solution: an optical element, including a lens part and a diffusion shell, wherein the lens part is provided with a plurality of lenses that are used to be respectively in one-to-one correspondence with lamp beads on a light source bar, each lens has a first end surface facing the lamp bead, the first end surface is provided with a concave cavity, the concave cavity is configured to accommodate at least one of the lamp beads; the diffusion shell is integrally formed with the lens part and located at a periphery of the lens part, and a peripheral edge of the diffusion shell is used to fixedly connect to a lamp disc.

[0005] As another embodiment of the present application, the concave cavity is fusiform, conical or hemispherical.

[0006] As another embodiment of the present application, each lens has a second end surface away from the lamp bead, and a central part of the second end surface is of a planar structure.

[0007] As another embodiment of the present application, a rounded transition structure is formed between an edge of the planar structure and a peripheral wall of the lens.

[0008] Compared with the prior art, the optical element provided in the present application has the following beneficial effects: the diffusion shell and the lens part are of an integral structure. A lamp using the optical element provided in the present application has less assembly steps and high assembly efficiency. Moreover, it is no necessary to adhere a plurality of lenses one by one during assembly, which eliminates the risk of loosening and falling off of the lens due to failure of the adhesion. The diffusion shell and the lens part are of an integral structure, which is further conducive to simplifying the lamp structure, reducing the overall thickness of the lamp, and improving the adaptability of the lamp to an installation space. In addition, the lamp using the optical element provided in the present application has a large light irradiation range and uniform light emission because light is refracted by the lenses and reflected by the diffusion shell.

[0009] The present application further provides a lamp, including a lamp disc, a light source bar, a light source driver, and the above optical element, wherein the light source bar is provided on a front surface of the lamp disc, the light source bar is provided with at least one row of lamp beads; and the light source driver is provided on a back surface of the lamp disc and electrically connected to the light source bar.

[0010] As another embodiment of the present application, the lamp disc is provided with at least one lamp cavity sinking toward a back surface of the lamp disc, each lamp cavity is provided with an opening edge, the light source bar is attached in an interior of the lamp cavity, the optical element is embedded into the interior of the lamp cavity, and the peripheral edge of the diffusion shell is fixedly connected to the opening edge of the lamp cavity.

[0011] As another embodiment of the present application, the peripheral edge of the diffusion shell is provided with a convex edge, and the convex edge is overlapped with the opening edge of the lamp cavity and fixedly adhered to the opening edge of the lamp cavity.

[0012] As another embodiment of the present application, the opening edge of the lamp cavity is provided with a step surface, and the convex edge is adhered to the step surface.

[0013] As another embodiment of the present application, the convex edge is adhered to the step surface by a pressure sensitive adhesive, the lamp cavity has a cavity bottom wall, and the light source bar is adhered to the cavity bottom wall of the lamp cavity by the pressure sensitive adhesive.

[0014] As another embodiment of the present application, at least two lamp cavities are arranged at intervals, an interior of each lamp cavity is provided with a light source bar and an optical element, and each light source bar is electrically connected to the light source driver.

[0015] Compared with the prior art, the lamp provided in the present application has the following beneficial effects: the above optical element is used, and the diffusion shell and the lens part are of an integral structure. In the process of assembling the lamp, assembly steps are less and the assembly efficiency is high, and moreover, it is no necessary to adhere a plurality of lenses one by one, which eliminates the risk of loosening and falling off of the lens due to failure of the adhesion. The diffusion shell and the lens part are of an integral structure, which is further conducive to simplifying the lamp structure, reducing the overall thickness of the lamp, and improving the adaptability of the lamp to an installation space. In addition, the lamp provided in the present application has a large light irradiation range and uniform light emission because light is refracted by the lenses and reflected by the diffusion shell.

BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To explain the technical solutions of the embodiments of the present application more clearly, the drawings which are required to be used in the description of the embodiments or the prior art will be briefly introduced below; obviously, the drawings in the description below are only some embodiments of the present application, and a person of ordinary skill in the art can obtain other drawings according to these drawings without involving any inventive effort.

Fig. 1 is a schematic stereostructure diagram of an optical element provided in an embodiment of the present application;

Fig. 2 is a schematic structural diagram of a cross section of the optical element provided in an embodiment of the present application, wherein the cross section passes through a concave cavity;

Fig. 3 is a schematic planar structure diagram of a lamp provided in an embodiment of the present application;

Fig. 4 is a schematic sectional structure diagram of A-A in Fig. 3;

Fig. 5 is a schematic local enlarged structural diagram of B in Fig. 4.

[0017] In the drawings, 100: optical element; 101: lens part; 1010: concave cavity; 1011: planar structure; 1012: rounded transition structure; 102: diffusion shell; 1020: convex edge; 200: lamp disc; 201: lamp cavity; 2010: step surface; 300: light source bar; 301: lamp bead; 400: light source driver; and 500: pressure sensitive adhesive.

DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS

[0018] To make the technical problems to be solved, technical solutions, and beneficial effects of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that specific embodiments described herein are only used to explain the present application, and are not intended to limit the present application.

[0019] Referring to Fig. 1 to Fig. 5 together, an optical element provided in the present application will be described. The optical element includes a lens part 101 and a diffusion shell 102. The lens part 101 is provided with a plurality of lenses, the plurality of lenses are used to be respectively in one-to-one correspondence with lamp beads on a light source bar 300, each lens has a first end surface facing the lamp bead 301, the first end surface is provided with a concave cavity 1010, the concave cavity 1010 is configured to accommodate at least one of the lamp beads; the diffusion shell 102 is integrally formed with the lens part 101 and located at a periphery of the lens part 101, and a peripheral edge of the diffusion shell 102 is used to fixedly connect to a lamp disc 200.

[0020] The optical element provided in the present application is manufactured in the following way: a double-injection molding process (double-injection molding refers to a molding process in which two different materials are injected into the same set of moulds so that a part molded by injection is formed by two materials, for example, the two materials are different in colors to improve an appearance of a product; or the two materials are different in hardness to improve an assembly ability of a product) is adopted; in the process of manufacturing, first, a lens part 101 is molded by injection (using a transparent material such as PMMA), wherein the lens part 101 includes a plurality of lenses, each lens has a concave cavity 1010; and then, a milk-white diffusion shell 102 is molded by secondary injection at a periphery of the lens part 101; after the double-injection molding is completed, the lens part 101 and the diffusion shell 102 are of an integral structure, and the peripheral edge of the lens part 101 is in seamless connection with an inner peripheral edge of the diffusion shell 102 to form a whole.

[0021] Compared with the prior art, the optical element provided in the present application has the following beneficial effects: the diffusion shell 102 and the lens part 101 are of an integral structure; in the process of assembling a lamp using the optical element provided in the present application, after the diffusion shell 102 is mounted on the lamp disc 200, the lens part 101 is also mounted, and each concave cavity 1010 is in one-to-one correspondence with each lamp bead 301, and the lamp bead 301 is just located in the concave cavity 1010. In the process of assembling a lamp of prior art, the lenses need to be fixedly adhered one by one, and then the diffuser is mounted after all lenses (generally in a large number) are fixed. Compared with the assembly process of prior art, the lamp using the optical element provided in the present application has less assembly steps, and the two parts, i.e. the diffusion shell 102 and the lens part 101, can mounted by one step, so that the assembly efficiency is high; and on the other hand, the plurality of lenses according to the present application are of an integral structure and constitute the lens part 101, so that after the lens part 101 is mounted, all lenses are located at preset positions, thereby avoiding the case where the lenses need to be fixedly adhered one by one. Therefore, on the one hand, the assembly efficiency is improved; and on the other hand, the risk of loosening and falling off of the lens due to failure of the adhesion is eliminated, which improves the quality of the lamp and prolongs the service life of the lamp. According to the present application, because the diffusion shell 102 and the lens part 101 are of an integral structure, in addition to the above advantages, the following advantages are also available: the number of parts for assembling the lamp is reduced, the overall structure of the lamp is simplified, the overall thickness of the lamp can be reduced, the appearance of the lamp can be improved, the lamp can be used in a place with a narrow space, and the adaptability of the lamp to an installation space is improved. In addition, compared with the prior art, according to the optical element provided in the present application, the lens part 101 is provided with a plurality of concave cavities 1010, and each lamp bead 301 on the light source bar 300 is located in each concave cavity 1010, respectively. Most of light emitted by the lamp beads is directly used for illumination after being refracted and diverged by the lenses, the rest of the light passes through the lenses, is irradiated to the diffusion shell 102 located at a periphery of the lenses, and is used for illumination after being reflected and diverged by the diffusion shell 102. Because the light is refracted by the lenses and reflected by the diffusion shell 102, an irradiation range of the light can be increased, and the uniformity of light emission of the lamp can be improved.

[0022] As a specific implementation of the optical element provided in the present application, referring to Fig. 2, the concave cavity 1010 is fusiform, conical or hemispherical. It should be noted that the concave cavity 1010 is fusiform means the concave cavity 1010 is shaped like a tip end of shuttle.

[0023] Each lamp bead 301 can be extended to an interior of the concave cavity 1010, a cavity wall of the concave cavity 1010 serves as an incident surface, light at various angles emitted by the lamp beads can pass through the cavity walls of the concave cavities, uniformly enters interiors of the lenses and is refracted, and then exits after secondary refraction of light exiting surfaces of the lenses (the light exiting surfaces are also outer walls of the lenses). The light emitted from the lenses is uniformly diverged and has a large irradiation range.

[0024] As a specific implementation of the optical element provided in the present application, referring to Fig. 2, each lens has a second end surface away from the bead 301, a central part of the second end surface is of a planar structure 1011, and a rounded transition structure 1012 is formed between an edge of the planar structure 1011 and a peripheral wall of the lens.

[0025] In the present embodiment, the peripheral wall of the lens is a cylindrical surface. Peripheral walls of adjacent lenses may be connected to each other or separated from each other (not shown in the drawings). The second end surface of the lens serves as a light exiting surface and its central part is of a planar structure 1011, which enables vertical light (light emitted along an axial direction of the lens) emitted by the lamp bead 301 to directly pass through (a refraction angel is zero) the lens for irradiation, thereby preventing an area to be illuminated corresponding to a center of the lens from becoming a dark area due to refraction of all light, and ensuring the uniform light emission of the lamp. Light emitted by the lamp bead 301 and deviating from the axial direction of the lens will be subjected to secondary refraction via a curved surface formed by the rounded transition structure 1012, and then exists from the lens, the curved surface formed by the rounded transition structure 1012 diverges the light, which increases the irradiation range and uniformity of the light.

[0026] The present application further provides a lamp. Referring to Fig. 3 to Fig. 5, the lamp includes a lamp disc 200, a light source bar 300, a light source driver 400, and the above optical element 100, wherein the light source bar 300 is provided on a front surface of the lamp disc 200, the light source bar 300 is provided with at least one row of lamp beads 301, and the light source driver 400 is provided on a back surface of the lamp disc 200 and electrically connected to the light source bar 300.

[0027] It should be noted that the light source bar 300 may be an LED light bar composed of at least one row of LED (Light-Emitting Diode) lamp beads. LED light has a large irradiation area after being refracted by the lenses, and has a good light emission effect. The uniformity of light emission of the lamp can be also improved by adjusting the number of and intervals between the lamp beads. The light source driver 400 provides a suitable working current to the lamp beads so as to ensure that the lamp beads work normally and emit light.

[0028] According to the lamp provided in the present application, the above optical element 100 is adopted, the diffusion shell 102 and the lens part 101 are of an integral structure, so that assembly steps of the lamp are less, and moreover, the two parts, i.e. the diffusion shell 102 and the lens part 101, can be mounted by one step, so that the assembly efficiency is high. The lens part 101 is of an integral structure, the plurality of lenses are mounted by one step, and it is no necessary to fixedly adhere the lenses one by one, which not only improves the assembly efficiency, but also eliminates the risking of loosening and falling off of the lens due to failure of the adhesion, improves the quality of the lamp, and prolongs the service life of the lamp. According to the present application, because the diffusion shell 102 and the lens part 101 are of an integral structure, in addition to the above advantages, the following advantages are also available: the number of parts for assembling the lamp is reduced, the overall structure of the lamp is simplified, the overall thickness of the lamp can be reduced, the appearance of the lamp can be improved, the lamp can be used in a place with a narrow space, the adaptability of the lamp to an installation space is improved, and the limitation of installation of the lamp is reduced. In addition, according to the lamp provided in the present application, light emitted by the light source bar 300 passes through the lens part 101 and the diffusion shell 102, and has a large irradiation range and high uniformity.

[0029] As a specific implementation of the lamp provided in the present application, referring to Fig. 3 to Fig. 5, the lamp disc 200 is provided with at least one lamp cavity 201 sinking toward a back surface of the lamp disc, each lamp cavity 201 has an opening edge, the light source bar 300 is adhered in an interior of the lamp cavity 201, the optical element 100 is embedded into the interior of the lamp cavity 201, and the peripheral edge of the diffusion shell 102 is fixedly connected to the opening edge of the lamp cavity 201. The lamp cavity 201 sinks toward the back surface of the lamp disc 200, and the lamp cavity 201 has an opening facing an area to be illuminated. An edge of the opening is the opening edge. A shape of the opening of the lamp cavity 201 is not limited, may be a rectangle shown in Fig. 3 and Fig. 4, or other shapes.

[0030] The front surface of the lamp disc 200 is an exposed surface (i.e. a surface facing the area to be illuminated), the lamp cavity 201 is provided, and the light source bar 300 and the optical element 100 are embedded into the interior of the lamp cavity 201, so that, on the one hand, the front surface of the lamp disc 200 is fat and simple, which improves the appearance of the lamp, and on the other hand, the overall thickness of the lamp can be reduced, which facilitates installation of the lamp in a place with a narrow space, and improves an application range of installation of the lamp.

[0031] In the present embodiment, referring to Fig. 2 and Fig. 5, the peripheral edge of the diffusion shell 102 is provided with a convex edge 1020, the convex edge 1020 is overlapped with the opening edge of the lamp cavity 201 and fixedly adhered to the opening edge of the lamp cavity 201. The convex edge 1020 can be overlapped with the opening edge of the lamp cavity 201 so as to position the diffusion shell 102 and enable the diffusion shell 102 to be embedded into a predetermined depth of the lamp cavity 201. The predetermined depth is substantially equal to a thickness of the diffusion shell 102 and a sinking depth of the lamp cavity 201, so as to reduce the overall thickness of the lamp as much as possible. When assembling the lamp, it is only necessary to apply a glue on the convex edge 1020, and then adhere the convex edge 1020 to the opening edge of the lamp cavity 201, which is simple and convenient. It should be noted that in the prior art, the lenses are also fixed by adhering. However, the adhesion between the convex edge 1020 and the opening edge of the lamp cavity 201 in the present application is different from the adhesion between the lenses in the prior art. An adhesion area between the convex edge 1020 and the opening edge of the lamp cavity 201 is larger, the adhesion is firm and reliable, and will not cause the risk of falling off of the whole diffusion shell 102 and lens part 101 due to failure of the adhesion. In addition, in the present application, the connection between the convex edge 1020 and the opening edge of the lamp cavity 201 is not limited to adhesion, and they may be also fixedly connected in other manners (such as a screw).

[0032] Specifically, referring to Fig. 5, the opening edge of the lamp cavity 201 is provided with a step surface 2010, and the convex edge 1020 is adhered to the step surface 2010. In Fig. 5, the step surface 2010 forms an annular groove having a rectangular section at the opening edge of the lamp cavity 201. The convex edge 1020 can be embedded into the annular groove to position the diffusion shell 102. The convex edge 1020 is embedded into the annular groove, which further prevents the convex edge 1020 from protruding from the front surface of the lamp disc 200 to affect the appearance of the lamp.

[0033] As a specific implementation of the lamp provided in the present application, referring to Fig. 5, the convex edge 1020 is fixedly adhered to the step surface 2010 by a pressure sensitive adhesive 500, and the light source bar 300 is fixedly adhered to a cavity bottom wall of the lamp cavity 201 by a pressure sensitive adhesive 500 (not shown in the drawings). The fixed adhesion by the pressure sensitive adhesive 500 is simple, and moreover, the pressure sensitive adhesive 500 is an existing product with mature applications, so that the acquisition cost is low, and the adhesion is firm and reliable.

[0034] As a specific implementation of the lamp provided in the present application, referring to Fig. 3, at least two lamp cavities 201 are arranged at intervals (the number of the lamp cavities in Fig. 3 is two), an interior of each lamp cavity 201 is provided with a light source bar 300 and an optical element 100, and each light source bar 300 is electrically connected to the light source driver 400. The larger the area of the lamp disc 200, the greater the number of the lamp cavities, and the larger the illumination range of the lamp. According to the lamp provided in the present application, a size of the lamp disc 200 and the number of the lamp cavities can be set according to actual conditions such as user needs and installation positions, so the lamp is flexible and convenient, and has a wide application range.

[0035] The above are only preferred embodiments of the present application, and are not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be within the scope of protection of the present application.

Claims

1. An optical element, characterized by comprising:

a lens part (101), provided with a plurality of lenses that are used to be respectively in one-to-one correspondence with lamp beads on a light source bar (300), wherein each lens has a first end surface facing the lamp bead (301), the first end surface is provided with a concave cavity (1010), and the concave cavity (1010) is configured to accommodate at least one of the lamp beads; and

a diffusion shell (102), integrally formed with the lens part (101) and located at a periphery of the lens part (101), wherein a peripheral edge of the diffusion shell (102) is used to fixedly connect to a lamp disc (200).

2. The optical element according to claim 1, characterized in that the concave cavity (1010) is fusiform, conical or hemispherical.

3. The optical element according to claim 1, characterized in that each lens has a second end surface away from the lamp bead (301), and a central part of the second end surface is of a planar structure (1011).

4. The optical element according to claim 3, characterized in that a rounded transition structure (1012) is formed between an edge of the planar structure (1011) and a peripheral wall of the lens.

5. A lamp, characterized by comprising:

a lamp disc (200);

a light source bar (300), provided on a front surface of the lamp disc (200), the light source bar (300) being provided with at least one row of lamp beads;

a light source driver (400), provided on a back surface of the lamp disc (200) and electrically connected to the light source bar (300); and

the optical element (100) according to any one of claims 1 to 4.

6. The lamp according to claim 5, characterized in that the lamp disc (200) is provided with at least one lamp cavity (201) sinking toward a back surface of the lamp disc, each lamp cavity (201) has an opening edge, the light source bar (300) is attached in an interior of the lamp cavity (201), the optical element (100) is embedded into the interior of the lamp cavity (201), and the peripheral edge of the diffusion shell (102) is fixedly connected to the opening edge.

7. The lamp according to claim 6, characterized in that the peripheral edge of the diffusion shell (102) is provided with a convex edge (1020), and the convex edge (1020) is overlapped with the opening edge and fixedly adhered to the opening edge.

8. The lamp according to claim 7, characterized in that the opening edge is provided with a step surface (2010), and the convex edge (1020) is adhered to the step surface (2010).

9. The lamp according to claim 8, characterized in that the convex edge (1020) is fixedly adhered to the step surface (2010) by a pressure sensitive adhesive (500); the lamp cavity (201) has a cavity bottom wall, and the light source bar (300) is fixedly adhered to the cavity bottom wall by the pressure sensitive adhesive (500).

10. The lamp according to any one of claims 6 to 9, characterized in that at least two lamp cavities are arranged at intervals, the interior of each lamp cavity (201) is provided with one light source bar (300) and one optical element (100), and each light source bar (300) is electrically connected to the light source driver (400).

Drawing