CN211902485U

CN211902485U - LED lamp

Info

Publication number: CN211902485U
Application number: CN202020248213.7U
Authority: CN
Inventors: 方翔; 林建鑫; 陈云伟; 赵毅
Original assignee: Xiamen Lidaxin Lighting Co ltd
Current assignee: Xiamen Lidaxin Lighting Co ltd
Priority date: 2020-03-04
Filing date: 2020-03-04
Publication date: 2020-11-10
Anticipated expiration: 2030-03-04

Abstract

The application provides a LED lamp, including LED module, light guide plate, diffuser plate, reflecting plate and carriage, diffuser plate and light guide plate interval set up, are equipped with the structure that is in the light between diffuser plate and the light guide plate in the region that is close to the LED module. According to the LED lamp, the light blocking structure is arranged between the diffusion plate and the light guide plate and is located close to the LED module, so that light rays concentrated in the area close to the LED module on the light guide plate can be prevented from being emitted, and bright edges are avoided; and set up diffuser plate and light guide plate interval, avoid light guide plate and diffuser plate contact to produce the bright area, and make the light of light concentration region directly get into the diffuser plate in the light guide plate, so that light can better guide the diffusion, and then make the light luminance that the diffuser plate sees through more even.

Description

LED lamp

Technical Field

The application belongs to the field of lamps, and particularly relates to an LED lamp.

Background

In the illumination of school teaching areas, more and more lateral type teaching lamps are adopted for illumination. The teaching lamp of present generally sets up the light source in the side of light guide plate, sets up reflector panel and diffuser plate respectively on the two sides of light guide plate to the light that the light guide plate conduction light source sent, and jet out from the diffuser plate. The light guide plate can uniformly emit light by the light guide of the light guide plate and the diffusion of the diffusion plate, and the surface brightness of the light emitting surface is low, so that the glare is reduced. However, after entering the light guide plate, the light is gradually attenuated with the increase of the transmission distance, so that the light quantity is concentrated in the area of the light guide plate close to the light source, and bright edges are easy to appear.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the present application is to provide an LED lamp, so as to solve the problem that a bright edge is easily generated on one side of the LED lamp close to a light source in the related art.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions: the utility model provides a LED lamp, includes LED module, light guide plate, diffuser plate, reflecting plate and carriage, the light guide plate the diffuser plate reaches the reflecting plate support in the carriage, at least one side of light guide plate is for going into the light side, the LED module is located the income light side of light guide plate, the LED module is arranged in the carriage, the reflector plate is located the one side of light guide plate, the diffuser plate is located the another side of light guide plate, the diffuser plate with the light guide plate interval sets up, the diffuser plate with be close to between the light guide plate the region of LED module is equipped with the structure that is in the light.

In one embodiment, a light shielding structure is arranged on the side surface of the diffusion plate close to the LED module.

In one embodiment, the supporting frame includes a first frame supporting the light incident side of the light guide plate and a second frame supporting the non-light incident side of the light guide plate, a receiving groove is formed on an inner side surface of the first frame, the LED module is disposed in the receiving groove, corresponding sides of the light guide plate, the diffusion plate and the reflection plate are disposed in the receiving groove, the light blocking structure is a light blocking partition, the light blocking structure is a light blocking plate, one side of the light blocking plate is connected to the first frame, and the other side of the light blocking plate is connected to the light blocking partition.

In one embodiment, the light shielding plate, the light blocking partition and the corresponding first frame are integrally formed.

In one embodiment, a side wall of the accommodating groove on a side away from the light shielding plate is convexly arranged towards the middle of the accommodating groove.

In one embodiment, the light blocking structure extends from the edge of the light guide plate toward the middle of the light guide plate by a length greater than or equal to 5 mm.

In one embodiment, the distance between the light guide plate and the diffusion plate ranges from 0.5mm to 1 mm.

In one embodiment, two opposite side surfaces of the light guide plate are light incident sides, and the LED modules are respectively disposed at corresponding positions of the light incident sides of the light guide plate.

In one embodiment, the LED lamp further includes a heat dissipation sleeve that is fitted over the LED module, the LED module includes a substrate and LED beads disposed on the substrate, and the heat dissipation sleeve is provided with an opening that exposes the LED beads.

In one embodiment, an elastic pad is disposed on one side of the support frame, which faces away from the light guide plate, of the LED module.

One or more technical solutions in the embodiments of the present application have at least one of the following technical effects:

according to the LED lamp provided by the embodiment of the application, the light blocking structure is arranged between the diffusion plate and the light guide plate, and the light blocking structure is positioned close to the LED module, so that light rays concentrated in an area close to the LED module on the light guide plate can be prevented from being emitted, and a bright edge is avoided; and set up diffuser plate and light guide plate interval, avoid light guide plate and diffuser plate contact to produce the bright area, and make the light of light concentration region directly get into the diffuser plate in the light guide plate, so that light can better guide the diffusion, and then make the light luminance that the diffuser plate sees through more even.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or exemplary technical descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic top view of an LED lamp according to an embodiment of the present disclosure;

FIG. 2 is a sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic structural diagram of a transmission process of light emitted by the LED module shown in FIG. 2;

FIG. 4 is a schematic cross-sectional view of the first frame of FIG. 2;

FIG. 5 is a schematic cross-sectional view of the heat dissipation sleeve of FIG. 2;

fig. 6 is a schematic structural view of the elastic pad in fig. 2.

Fig. 7 is a schematic cross-sectional structure view of an LED lamp according to a second embodiment of the present application.

Fig. 8 is a schematic cross-sectional structure view of an LED lamp provided in the third embodiment of the present application.

Wherein, in the drawings, the reference numerals are mainly as follows:

100-an LED light fixture; 10-a support frame; 11-a first frame; 110-a receiving groove; 111-U-shaped groove; 21-a light blocking structure; 211-light barrier; 22-a light-shielding structure; 221-a visor; 12-a second frame;

30-an LED module; 31-a substrate; 32-LED lamp beads; 41-a light guide plate; 42-a reflector plate; 43-a diffuser plate; 50-a heat dissipation sleeve; 51-an opening; 52-a platen; 53-positioning ribs; 60-elastic cushion.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

In the description of the present application, it is to be understood that the terms "center," "length," "width," "thickness," "top," "bottom," "inner," and the like are used in the orientations and positional relationships indicated in the drawings for the purpose of convenience in describing the present application and simplifying the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Reference throughout this specification to "one embodiment," "some embodiments," or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The english abbreviations used in this application correspond to the following chinese and english letters:

LED, english: light Emitting Diode; chinese: a light emitting diode.

Referring to fig. 1 to 4, an LED lamp 100 provided by the present application will now be described. The LED lamp 100 includes an LED module 30, a light guide plate 41, a diffusion plate 43, a reflection plate 42, and a support frame 10. The LED module 30 is used for emitting light to illuminate. The LED module 30 is disposed in the support frame 10 to support and protect the LED module 30 through the support frame 10. The light guide plate 41, the diffusion plate 43, and the reflection plate 42 are mounted on the support frame 10, and the light guide plate 41, the diffusion plate 43, and the reflection plate 42 are supported by the support frame 10. At least one side surface of the light guide plate 41 is a light incident side, and the LED module 30 is disposed on the light incident side of the light guide plate 41, so that light emitted from the LED module 30 can conveniently enter the light guide plate 41 for guiding and diffusing. The reflective plate 42 is disposed on one surface of the light guide plate 41, so that the light emitted from the light guide plate 41 to one surface of the reflective plate 42 is reflected by the reflective plate 42 back to the light guide plate 41; the diffusion plate 43 is disposed on the other surface of the light guide plate 41, so that the light emitted from the light guide plate 41 to the diffusion plate 43 is diffused by the diffusion plate 43 and then emitted out, thereby facilitating illumination and making the light emission more uniform. The diffusion plate 43 and the light guide plate 41 are spaced apart from each other, so that light rays in the light guide plate 41 can be prevented from entering the diffusion plate 43 through the contact portion between the diffusion plate 43 and the light guide plate 41 and then being emitted, and a bright area is generated. Especially, in the area of the light guide plate 41 close to the LED module 30, since the light is concentrated in the light guide plate 41, more light can enter the diffusion plate 43 more easily, and a bright area is generated. By disposing the diffusion plate 43 and the light guide plate 41 at a distance, part of the light is reflected at the surface of the light guide plate 41 near the diffusion plate 43, so that the light is better transmitted and diffused in the light guide plate 41. The light blocking structure 21 is disposed between the diffusion plate 43 and the light guide plate 41, and the light blocking structure 21 is disposed in the area close to the LED module 30, so that the angle of the light emitted from the LED module 30 can be blocked, more light near the LED module 30 area of the light guide plate 41 can be irradiated to the other side of the light guide plate 41, and the light can be blocked from being emitted from the area of the light guide plate 41 close to the LED module 30, so as to avoid the occurrence of bright edges.

In the LED lamp 100 provided in the embodiment of the present application, the light blocking structure 21 is disposed between the diffusion plate 43 and the light guide plate 41, and the light blocking structure 21 is located at a position close to the LED module 30, so that light concentrated in an area close to the LED module 30 on the light guide plate 41 can be prevented from being emitted, and a bright edge is prevented from appearing; the diffusion plate 43 and the light guide plate 41 are arranged at intervals, so that a bright area is prevented from being generated when the light guide plate 41 contacts with the diffusion plate 43, and light rays in a light ray concentration area in the light guide plate 41 directly enter the diffusion plate 43, so that the light rays can be guided and diffused better, and the brightness of the light rays penetrating through the diffusion plate 43 is more uniform.

In one embodiment, referring to fig. 2 to 4, the light shielding structure 22 is disposed on a side of the diffusion plate 43 close to the LED module 30, so as to prevent light emitted from the LED module 30 from directly entering the diffusion plate 43 from the side of the diffusion plate 43, and further prevent bright edges from occurring.

In one embodiment, the length L1 of the light blocking structure 21 extending from the edge of the light guide plate 41 toward the middle of the light guide plate 41 is greater than or equal to 5mm, so as to better limit the transmission angle of the light in the area of the light guide plate 41 close to the LED module 30, so that the light is better transmitted to the other side of the light guide plate 41, and the light in the area is prevented from entering the diffusion plate 43, thereby avoiding the occurrence of bright edges. Of course, the length L1 of the light blocking structure 21 extending from the edge of the light guide plate 41 toward the middle of the light guide plate 41 is not too long, so as to avoid blocking the light emitting area of the LED module 30.

In some embodiments, the length L1 of the light blocking structure 21 extending from the edge of the light guide plate 41 toward the middle of the light guide plate 41 is preferably less than 2cm in general, so as to avoid an excessive shielding area.

In one embodiment, the length L1 of the light blocking structure 21 extending from the edge of the light guide plate 41 toward the middle of the light guide plate 41 is 8mm, which can ensure that the light guide plate 41 has a large light emitting area and can well avoid the occurrence of bright edges.

In one embodiment, referring to fig. 7, only the light blocking structure 21 may be disposed to limit the transmission angle of the light in the area of the light guide plate 41 close to the LED module 30.

In one embodiment, referring to fig. 7, the light-blocking structure 21 is a light-blocking partition 211, and the light-blocking partition 211 is used to achieve a good light-blocking effect and separate the light guide plate 41 from the diffusion plate 43. Of course, in some embodiments, a spacing plate may be disposed between the light guide plate 41 and the diffusion plate 43 to space the light guide plate 41 and the diffusion plate 43 apart.

In some embodiments, the light blocking structure 21 may also be a light blocking coating, a light blocking film layer, a light blocking sheet, or the like. And the light guide plate 41 and the diffusion plate 43 are spaced apart by a spacer.

In one embodiment, referring to fig. 8, the light shielding structure 22 is a light shielding plate 221. In some embodiments, the light-shielding structure 22 may also be a light-shielding coating, a light-shielding film layer, a light-shielding sheet, or the like.

In an embodiment, referring to fig. 1, fig. 2 and fig. 4, the supporting frame 10 includes a first frame 11 and a second frame 12, the first frame 11 supports the light incident side of the light guide plate 41, the second frame 12 supports the non-light incident side of the light guide plate 41, the inner side of the first frame 11 is provided with a receiving groove 110, and corresponding sides of the light guide plate 41, the diffusion plate 43 and the reflection plate 42 are disposed in the receiving groove 110, so that the first frame 11 supports the corresponding sides of the light guide plate 41, the diffusion plate 43 and the reflection plate 42.

In one embodiment, the structure of the second frame 12 may be the same as the structure of the first frame 11 for industrial fabrication. In some embodiments, the second frame 12 may also be configured to have an L-shaped cross section, so as to simplify the structure and reduce the cost.

In an embodiment, referring to fig. 2, 3 and 4, one side of the light shielding plate 221 is connected to the first side frame 11, the other side of the light shielding plate 221 is connected to the light blocking partition 211, the light shielding plate 221, the light blocking partition 211 and the corresponding first side frame 11 are integrally formed to ensure the connection strength between the light shielding plate 221, the light blocking partition 211 and the corresponding first side frame 11, and the first side frame 11 may use a profile structure, and the light shielding plate 221, the light blocking partition 211 and the corresponding side wall of the receiving groove 110 form a U-shaped groove 111 structure, which is convenient for receiving and installing the corresponding side of the diffusion plate 43, i.e. playing a role of blocking light, and positioning and supporting the light blocking plate.

In one embodiment, the width of the U-shaped groove 111 is W, and the thickness of the diffusion plate 43 is H1, then H1-0.4mm W.ltoreq.H 1+0.4mm, so that the corresponding side of the diffusion plate 43 can be well fixed in the U-shaped groove 111.

In one embodiment, referring to fig. 8, one side of the light shielding plate 221 is connected to the first frame 11, the other side of the light shielding plate 221 is connected to the light blocking partition 211, and the light shielding plate 221, the light blocking partition 211 and the first frame 11 can be manufactured separately and then assembled.

In one embodiment, referring to fig. 2, fig. 3 and fig. 4, the distance between the light guide plate 41 and the diffusion plate 43 is in a range of 0.5mm to 1mm to reduce the thickness of the LED lamp 100, and the light emitted from the light guide plate 41 to the diffusion plate 43 can directly enter the diffusion plate 43.

In one embodiment, when the light guide plate 41 and the diffusion plate 43 are spaced apart by the light-blocking partition 211, the thickness H4 of the light-blocking partition 211 ranges from 0.5mm to 1 mm.

In an embodiment, referring to fig. 2, 3 and 4, a side wall of the receiving groove 110 away from the light shielding plate 221 is protruded toward a middle portion of the receiving groove 110, and the receiving groove 110 can form a necking structure, so that when the LED module 30 is disposed in the receiving groove 110, the LED module 30 can be better positioned, and the LED module 30 can be prevented from falling off.

In one embodiment, two opposite side surfaces of the light guide plate 41 are light incident sides, and the LED modules 30 are respectively disposed at positions corresponding to the light incident sides of the light guide plate 41. Since the closer to the LED module 30, the higher the light intensity in the light guide plate 41; the light incident sides are respectively disposed on two opposite sides of the light guide plate 41, and the LED modules 30 are respectively disposed on each light incident side, so that the light on two opposite sides of the light guide plate 41 is more uniform, and the light on two sides is stacked at the middle position of the light guide plate 41, so that the light intensity at the middle position of the light guide plate 41 is enhanced, and further the light at each position in the light guide plate 41 is more uniform, and further the light emitted from the LED lamp 100 is more uniform.

In one embodiment, the diffusion plate 43 may be an anti-glare plate, so that the LED lamp 100 may better perform the anti-glare function.

In one embodiment, the reflective plate 42 may be a reflective sheet or a reflective coating layer provided on the light guide plate 41. In some embodiments, the reflective plate 42 may further include a hard plate and a reflective layer disposed on a side of the hard plate adjacent to the light guide plate 41.

In one embodiment, referring to fig. 2, 3 and 4, the accommodating groove 110 is further provided with an elastic pad 60, and the elastic pad 60 is located between the bottom surface of the accommodating groove 110 and the LED module 30. The elastic pad 60 is disposed to abut against the LED module 30, so as to fix the LED module 30 better. In addition, when the light guide plate 41 is thermally expanded or hygroscopic-expanded, a certain buffer space can be provided.

In one embodiment, the elastic pad 60 can be made of a heat conductive material to provide good heat conduction for further dissipating heat of the LED module 30.

In one embodiment, the light guide plate 41 expands or absorbs moisture to expand by S, and the thickness H3 of the elastic pad 60 is greater than or equal to the expansion amount S of the light guide plate 41. Namely H3 ≧ S.

In one embodiment, the length of the light guide plate 41 from one side to the other side is C, and S ═ C × 2.5 ‰.

In one embodiment, the thickness H5 of resilient pad 60 is 2 mm.

In one embodiment, referring to fig. 3 to fig. 5, the LED lamp 100 further includes a heat dissipation sleeve 50, and the heat dissipation sleeve 50 is fittingly sleeved on the LED module 30 to protect the LED module 30. The LED module 30 includes a substrate 31 and LED beads 32 disposed on the substrate 31, and the heat dissipation sleeve 50 is provided with openings 51 exposing the LED beads 32. The heat dissipation sleeve 50 is sleeved on the LED module 30, so that heat of the LED module 30 can be better conducted to the support frame 10, the heat dissipation efficiency is improved, and the LED module 30 can be protected.

In an embodiment, referring to fig. 3 and 5, a pressing plate 52 is protruded from an outer surface of the heat dissipation sleeve 50 near the reflector 42, and the pressing plate 52 is attached to the reflector 42, so that the heat dissipation sleeve 50 can be better fixed, the heat dissipation area can be increased, and the heat dissipation efficiency can be improved.

In one embodiment, the elastic pad 60 is attached to the heat dissipation sleeve 50 for easy installation.

In one embodiment, a positioning rib 53 protrudes from one side of the pressure plate 52, and the positioning rib 53 is used to position the reflection plate 42.

In one embodiment, the height of the positioning ribs 53 is less than or equal to the thickness of the reflective plate 42.

In one embodiment, the thickness of the platen 52 is greater than or equal to 1mm to ensure the strength of the platen 52.

In one embodiment, the width of the elastic pad 60 is 8.2mm, the thickness H5 of the elastic pad 60 is 2mm, and the thickness H4 of the light blocking partition 211 is 0.9 mm. The thickness H1 of the diffusion plate 43 was 2.5mm, the thickness H2 of the light guide plate 41 was 2.0mm, and the thickness H3 of the reflection plate 42 was 0.5 mm.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

The LED lamp comprises an LED module, a light guide plate, a diffusion plate, a reflection plate and a supporting frame, wherein the light guide plate and the diffusion plate are supported in the supporting frame, at least one side face of the light guide plate is a light inlet side, the LED module is arranged on the light inlet side of the light guide plate, the LED module is arranged in the supporting frame, the reflection plate is arranged on one face of the light guide plate, and the diffusion plate is arranged on the other face of the light guide plate, and is characterized in that: the diffusion plate and the light guide plate are arranged at intervals, and a light blocking structure is arranged between the diffusion plate and the light guide plate in an area close to the LED module.
2. The LED light fixture of claim 1 wherein: and a light shielding structure is arranged on the side surface of the diffusion plate, which is close to the LED module.
3. The LED light fixture of claim 2 wherein: the supporting frame comprises a first frame and a second frame, the first frame supports the light incident side of the light guide plate, the second frame supports the non-light incident side of the light guide plate, a containing groove is formed in the inner side face of the first frame, the LED module is arranged in the containing groove, the corresponding sides of the light guide plate, the diffusion plate and the reflection plate are arranged in the containing groove, the light blocking structure is a light blocking partition plate, the light blocking structure is a light blocking plate, one side of the light blocking plate is connected with the first frame, and the other side of the light blocking plate is connected with the light blocking partition plate.
4. The LED light fixture of claim 3 wherein: the light shielding plate, the light blocking partition plate and the corresponding first frame are integrally formed.
5. The LED light fixture of claim 3 wherein: the side wall of the containing groove, which is far away from one side of the shading plate, is arranged in a protruding manner towards the middle of the containing groove.
6. The LED lamp of any of claims 1-5, wherein: the length of the light blocking structure extending from the edge of the light guide plate to the middle of the light guide plate is greater than or equal to 5 mm.
7. The LED lamp of any of claims 1-5, wherein: the distance between the light guide plate and the diffusion plate ranges from 0.5mm to 1 mm.
8. The LED lamp of any of claims 1-5, wherein: the LED module is arranged at the position, corresponding to the light incident side, of each light incident side of the light guide plate.
9. The LED lamp of any of claims 1-5, wherein: the LED lamp further comprises a heat dissipation sleeve which is sleeved on the LED module in a matched mode, the LED module comprises a substrate and LED lamp beads arranged on the substrate, and openings which are exposed out of the LED lamp beads are formed in the heat dissipation sleeve.
10. The LED lamp of any of claims 1-5, wherein: and an elastic pad is arranged on one side of the LED module deviating from the light guide plate in the support frame.