WO2022121798A1

WO2022121798A1 - Side-emitting panel light

Info

Publication number: WO2022121798A1
Application number: PCT/CN2021/135375
Authority: WO
Inventors: 李滨
Original assignee: 欧普照明股份有限公司; 苏州欧普照明有限公司
Priority date: 2020-12-11
Filing date: 2021-12-03
Publication date: 2022-06-16
Also published as: CN214249263U

Abstract

A side-emitting panel light, comprising a frame body (1), and a light source (3), an exit panel (4) and a light guide plate (6), which are arranged in the frame body (1). The bottom of the frame body (1) is provided with a light outlet; the exit panel (4) and the light guide plate (6) are arranged at the bottom of the frame body (1) and are sequentially stacked upwards; and the light source (3) is arranged on a side wall of the frame body (1) and is located on a side edge of the light guide plate (6), and a gap is present between the light source (3) and the light guide plate (6). The side-emitting panel light further comprises a reflecting strip (2), wherein the reflecting strip (2) is arranged on the frame body (1) and below the light source (3), extends to a position below a light exit surface of the light guide plate (6) in a direction away from the light source (3), and is parallel to the light guide plate (6). By means of providing the reflecting strip, part of stray light that cannot enter the light guide plate is reflected into the light guide plate again, thereby improving the lighting effect of the side-emitting panel light, and also weakening a bright yellow border of the side-emitting panel light.

Description

Side emitting panel light

This application claims the priority of the Chinese patent application whose filing date is December 11, 2020, the application number is 202022957071.4, and the utility model name is "side-emitting flat panel light", the entire contents of which are incorporated into this application by reference.

technical field

The present application relates to the technical field of lighting, and in particular, to a side-emitting flat panel lamp.

Background technique

The side-emitting panel light is a uniform flat light-emitting lamp formed by a light guide plate with high light transmittance. It has the advantages of convenient installation, small footprint, uniform light output, soft light, comfortable and bright light, and can effectively relieve eye fatigue. It is widely used in the field of indoor lighting.

In the structure of the existing side-emitting flat panel light, there is a gap between the light source plate and the light guide plate. The existence of the gap prevents all the light sources on the light source panel from entering the light guide plate, which affects the light efficiency of the side-emitting flat panel light. In the prior art, the method of reducing the gap is generally used to improve the light efficiency of the side-emitting flat panel lamp. But the gap is too small, and the installation is inconvenient.

In view of this, it is indeed necessary to provide a side-emitting flat panel light to solve the above problems.

SUMMARY OF THE INVENTION

The purpose of the present application is to provide a side-emitting flat panel lamp capable of improving light efficiency.

In order to achieve the above purpose, the present application provides a side-emitting flat panel lamp, comprising a frame body, a light source arranged in the frame body, an exit panel and a light guide plate, the bottom of the frame body is provided with a light exit port; the exit panel and The light guide plate is arranged at the bottom of the frame body and is stacked upward in sequence; the light source is arranged on the side wall of the frame body and is located on the side of the light guide plate, and there is a space between the light source and the light guide plate. The side-emitting flat panel light further includes a reflective strip, which is arranged on the frame body and is located below the light source and extends along the direction away from the light source to the edge of the light-emitting surface of the light guide plate. below and parallel to the light guide plate.

As a further improvement of the present application, the reflection strip is located on the side of the exit panel close to the light source, and the height of the upper surface of the reflection strip on the frame body is not lower than the upper surface of the exit panel Height above the frame body.

As a further improvement of the present application, the side-emitting flat panel light further includes a retaining rib, the retaining rib is arranged between the light source and the exit panel, and protrudes upward from the bottom of the frame body for positioning the the reflective strips.

As a further improvement of the present application, the reflective strip is fixed between the PCB board where the light source is located and the blocking rib, and extends from below the light source to below the light exit surface of the light guide plate.

As a further improvement of the present application, the exit panel is disposed on the side of the blocking rib away from the light source, and the height of the upper surface of the exit panel on the frame body is not higher than the height of the blocking rib .

As a further improvement of the present application, the frame body is further provided with a reflective layer, the reflective layer is located on the side of the backlight surface of the light guide plate, and the size of the reflective layer is larger than that of the light guide plate, the A portion of the reflective layer larger than the light guide plate extends toward the light source to above the light source.

As a further improvement of the present application, the side-emitting flat panel light further includes a back plate, the back plate is arranged above the reflective layer, and the back plate is fixedly connected to the frame body at the top of the frame body .

As a further improvement of the present application, the side-emitting flat panel light further includes a diffuser film, and the diffuser film is disposed between the exit panel and the light guide plate.

As a further improvement of the present application, the side-emitting flat light further includes an pearl cotton pad, and the pearl cotton pad is arranged between the reflective layer and the back plate.

As a further improvement of the present application, the exit panel is a prism plate or a diffuser plate.

The beneficial effects of the present application are as follows: in a side-emitting flat panel lamp of the present application, by arranging reflective strips and large-sized reflective layers on both sides of the light guide plate, the stray light that did not enter the light guide plate can pass through the reflective strips and the large-sized reflective layers. The reflective layer re-enters the light guide plate, which improves the light efficiency of the side-emitting flat panel lamp, and at the same time reduces the bright edge and yellow edge of the side-emitting panel lamp.

Description of drawings

FIG. 1 is a structural disassembly diagram of a side-emitting flat panel light according to a preferred embodiment of the present application.

FIG. 2 is a partial cross-sectional view of the present application.

FIG. 3 is a partial enlarged view of FIG. 2 .

Detailed ways

In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be described in detail below with reference to the accompanying drawings and specific embodiments.

Here, it should be noted that, in order to avoid obscuring the present application due to unnecessary details, only the structures and/or processing steps closely related to the solution of the present application are shown in the drawings, and the drawings related to the present application are omitted. Other details that don't matter much.

In addition, it should be noted that the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device comprising a series of elements includes not only those elements, but also Also included are other elements not expressly listed or inherent to such a process, method, article or apparatus.

Referring to FIGS. 1-3 , a side-emitting flat panel light 100 according to a preferred embodiment provided by the present application includes a frame body 1 , a light source 3 disposed in the frame body 1 , an exit panel 4 and a light guide plate 6 . The bottom of the frame body 1 is provided with a light outlet, so that the light of the light source 3 is irradiated from the light outlet to provide light for the room. The outgoing panel 4 and the light guide plate 6 are arranged at the bottom of the frame body 1 and stacked upward in sequence, that is, the outgoing panel 4 is arranged at the bottom of the frame body 1 , and the light guide plate 6 is stacked above the outgoing panel 4 . The light source 3 is disposed on the side wall of the frame body 1 and on the side surface of the light guide plate 6 , and there is a gap between the light source 3 and the light guide plate 6 . The area of the light source 3 facing the light guide plate 6 is smaller than the area of the light incident side of the light guide plate 6 .

Specifically, the side of the light guide plate 6 facing the light outlet of the frame body 1 is the light emitting surface, the side away from the light outlet is the backlight surface, and the side corresponding to the light source 3 is the light incident side. The light emitted by the light source 3 enters from the light incident side of the light guide plate 6 and is refracted by the light guide plate 6 from the light exit surface of the light guide plate 6 to the incident panel 4 , and diffuses uniformly through the incident panel 4 . go out. The area of the light source 3 facing the light guide plate 6 is smaller than the area of the light incident side of the light guide plate 6, so that most of the light emitted by the light source 3 enters the light guide plate 6, thereby avoiding the loss of light efficiency.

Further, due to the limitation of the installation process, there is a gap between the light source 3 and the light guide plate 6 . The existence of the gap prevents all the light sources 3 from entering the light guide plate 6 and affects the light efficiency of the side-emitting flat panel lamp 100 . On this basis, the present application provides a reflective strip 2 below the light source 3 on the frame body 1 . The reflective strip 2 extends in a direction away from the light source 3 to below the light-emitting surface of the light guide plate 6 and is parallel to the light guide plate 6 . By arranging the reflective strips 2 under the light source 3, and the reflective strips 2 extend to the bottom of the light-emitting surface of the light guide plate 6, and are parallel to the light guide plate 6, the stray light that does not enter the light guide plate 6 is re-entered through the reflection effect of the reflective strips 2. into the light guide plate 6, thereby improving the light efficiency.

Further, the reflection strip 2 is located on the side of the exit panel 4 close to the light source 3 , and the height of the upper surface of the reflection strip 2 on the frame body 1 is not lower than the height of the upper surface of the exit panel 4 on the frame body 1 . Through this arrangement, the stray light that does not enter the light guide plate 6 can be re-entered into the light guide plate 6 through the reflective strips 2 , thereby improving the light efficiency. At the same time, the light emitted from the light source 3 is blocked from entering the exit panel 4 , thereby reducing the bright and yellow edges of the side-emitting flat panel lamp 100 .

Further, the side-emitting flat light 100 further includes a retaining rib 11 , which is disposed between the light source 3 and the exit panel 4 and protrudes upward from the bottom of the frame body 1 for positioning the reflection strip 2 . In a preferred embodiment of the present application, the frame body 1 is an aluminum frame, and the retaining rib 11 and the frame body 1 are integrally formed. In other embodiments, the frame body 1 can also be made of other materials, and the retaining ribs 11 can be connected to the frame body 1 as a separate component. This application does not limit this.

Specifically, the rib 11 is provided so that there is a gap between the side wall of the frame main body 1 and the rib 11 , and the reflective strip 2 is fixed between the side wall of the frame main body 1 and the rib 11 . In fact, since the light source 3 is arranged on the side wall of the frame body 1 , the PCB board 31 where the light source 3 is located is arranged on the side wall of the frame body 1 . When installing, first install the PCB board 31 where the light source 3 is located on the side wall of the frame body 1, and then due to the existence of the blocking ribs 11, there is a gap between the PCB board 31 and the blocking ribs 11, and install the reflective strip 2 on the The light source 3 is located in the gap between the PCB board 31 and the retaining rib 11 , and extends from below the light source 3 to below the light exit surface of the light guide plate 6 . The stray light emitted by the light source 3 that does not enter the light guide plate 6 is re-entered into the light guide plate 6 through the reflection of the reflective strips 2, thereby improving the light efficiency.

Further, the exit panel 4 is disposed on the side of the blocking rib 11 away from the light source 3 , and the height of the upper surface of the exit panel 4 on the frame body 1 is not higher than the height of the blocking rib 11 . Because the baffle 11 is provided on the bottom of the frame body 1, the baffle 11 is located between the light source 3 and the exit panel 4, and the height of the upper surface of the exit panel 4 on the frame body 1 is not higher than the height of the baffle 11 , so that the light emitted by the light source 3 can be blocked from directly entering the exit panel 4 , thereby reducing the bright edge and yellow edge of the side-emitting flat panel lamp 100 .

Further, the light guide plate 6 is located above the blocking rib 11 and the partial reflection strip 2 , the side of the light guide plate 6 is closer to the side wall of the frame body 1 , and the exit panel 4 is arranged on the side of the blocking rib 11 away from the light source 3 . Between the panel 4 and the side wall of the frame body 1, there are also reflection strips 2 and retaining ribs 11, so that the exit panel 4 is farther from the side wall of the frame body 1 than the light guide plate 6, thereby reducing the use size of the exit panel 4. , thereby saving costs.

Further, the frame body 1 is further provided with a reflective layer 7 . The reflective layer 7 is arranged on the backlight side of the light guide plate 6 , and the size of the reflective layer 7 is larger than that of the light guide plate 6 . Laying a layer of reflective paper on the backlight surface of the light guide plate 6 can make the light entering the light guide plate 6 exit from the light exit surface of the light guide plate 6 and enter the exit panel 4 , and there will be no light from the backlight surface of the light guide plate 6 . out, so as to improve the light efficiency. Further, the size of the reflective layer 7 is larger than the size of the light guide plate 6 , and the portion of the reflective layer 7 larger than the light guide plate 6 extends to the top of the light source 3 in the direction of the light source 3 , so that the light leaking from the top of the light source 3 enters through the reflective layer 7 . to the light guide plate 6 , thereby more effectively improving the light efficiency of the side-emitting flat panel lamp 100 .

Further, the side-emitting flat panel light 100 further includes a back plate 9 , the back plate 9 is disposed above the reflective layer 7 , and the back plate 9 is fixedly connected to the frame main body 1 at the top of the frame main body 1 . The back plate 9 is arranged on the top of the frame main body 1 and is fixedly connected to the frame main body 1, so that a closed space is formed between the frame main body 1 and the back plate 9, and the exit panel 4, the light guide plate 6 and the reflection layer 7 are sequentially stacked upward on the frame main body. 1, so that each component constitutes a whole. Specifically, the exit panel 4 is located at the bottom of the frame body 1 , the light guide plate 6 , the reflective layer 7 , and the back plate 9 are stacked upward in sequence, the light source 3 is located on the side wall of the frame body 1 , and the reflection strip 2 is located on the frame body 1 from the light source 3 . The lower part extends to the lower part of the light-emitting surface of the light guide plate 6 . In a preferred embodiment of the present embodiment, the back plate 9 is fixedly connected to the frame main body 1 by using screws 10. In other embodiments, other structures that can fix the back plate 9 and the frame main body 1 can also be used, such as gluing, welding, etc. This application does not limit this.

Further, the side-emitting flat panel light 100 further includes a diffusion film 5 , and the diffusion film 5 is located between the exit panel 4 and the light guide plate 6 . However, it should be noted that the diffusion film 5 is an optional component. When the requirements of Unified Glare Rating need to be met in some application scenarios, the use of the diffuser film 5 can reduce the UGR to a certain value, thereby preventing glare. When the application scenario does not require UGR, the side-emitting flat panel light 100 may not be provided with the diffusion film 5, thereby saving costs.

Further, the side-emitting flat light 100 further includes a pearl cotton pad 8 , and the pearl cotton pad 8 is arranged between the reflective layer 7 and the back plate 9 . However, it should be noted that the pearl cotton pad 8 is also an optional component. Specifically, in a preferred embodiment of the present application, the pearl cotton pad 8 is an EPE pearl cotton pad 8. By setting the EPE pearl cotton pad 8, each component can be installed in the frame body 1 more closely, and the EPE pearl cotton pad 8 can be installed more closely. The cotton pad 8 has the functions of water-proof, moisture-proof and anti-static, which can improve the use safety of the side-emitting flat panel light 100 . When the material of the back plate 9 can meet the above requirements, the EPE pearl cotton pad 8 may not be provided.

Further, the exit panel 4 is a prism plate or a diffuser plate. Both the prism plate and the diffuser plate can diffuse the light entering them more evenly, so that the light can be uniformly emitted from the prism plate or the diffuser plate, but the diffusion principle of the two is different. During specific implementation, a prism plate or a diffuser plate can be flexibly selected as the exit panel according to different application scenarios and design requirements.

Specifically, the installation structure of the side-emitting flat panel light 100 according to a preferred embodiment of the present application is as follows: first, the PCB board 31 where the light source 3 is located is installed on the side wall of the frame body 1, and then the reflective strips are positioned by the positioning of the retaining ribs 11. 2 is installed in the gap between the PCB board 31 where the light source 3 is located and the retaining rib 11 , and extends to the bottom of the light-emitting surface of the light guide plate 6 . In the frame body 1 from the bottom of the frame body 1, the output panel 4, the diffuser film 5, the light guide plate 6, the reflective layer 7, the EPE pearl cotton pad 8 and the back plate 9 are stacked in sequence upward, and then the back plate 9 is fixed by screws 10. It is connected to the frame body 1 so as to fix the various components in the closed space formed by the back plate 9 and the frame body 1 . The light emitted by the light source 3 enters the light guide plate 6 from the light incident side of the light guide plate 6, is refracted by the light guide plate 6 and irradiates from the light exit surface of the light guide plate 6 to the diffusion film 5 and the exit panel 4, and passes through the diffusion film 5 and the exit panel. After 4, the light becomes more uniform and soft, and then radiates out from the light outlet at the bottom of the frame body 1. The stray light that does not enter the light guide plate 6 is reflected by the reflective strips 2 and the large-area reflective layer 7 and re-enters the light guide plate 6 , thereby effectively improving the light efficiency of the side-emitting flat panel lamp 100 . In addition, the larger the gap between the light source 3 and the light guide plate 6, the more obvious the effect of improving the light efficiency, which solves the problem of reducing the light efficiency caused by the gap caused by the installation process. By setting the rib 11, it is used to locate the position of the reflective strip 2, and by providing the reflective strip 2 and the rib 11, the light is blocked from directly entering the exit panel 4, thereby weakening the bright edge and yellow edge of the side-emitting flat panel lamp 100.

In fact, with this setting, the larger the gap between the light source 3 and the light guide plate 6, the better the effect of using the reflective strip 2 and the large-area reflective layer 7 to improve the light efficiency of the side-emitting flat panel lamp 100. Specifically, when the distance between the light source 3 and the light guide plate 6 is 0.2 mm, the light effect can be improved by two points through the reflection effect of the reflection strip 2 and the large-area reflection layer 7 . When the distance between the light source 3 and the light guide plate 6 is 0.8 mm, the light effect can be improved by 8 points through the reflection effect of the reflective strip 2 and the large-area reflective layer 7 . By arranging the reflective strips 2 and the large-area reflective layer 7, the problem of reduced light efficiency caused by the gap between the light source 3 and the light guide plate 6 caused by the installation process is solved.

To sum up, in the side-emitting flat panel lamp 100 of the present application, the rib 11 is provided for positioning the reflective strip 2 , and the reflective strip 2 and the large-sized reflective layer 7 are provided to prevent stray light from entering the light guide plate 6 Re-entering the light guide plate 6 through the reflective strips 2 and the large-sized reflective layer 7 improves the light efficiency of the side-emitting flat panel lamp 100 , and at the same time, due to the existence of the blocking ribs 11 and the reflective strips 2 , the stray light is blocked from entering the exit panel 4 , thereby weakening the bright and yellow edges of the side-emitting flat panel light 100 .

The above embodiments are only used to illustrate the technical solutions of the present application rather than limitations. Although the present application has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present application can be modified or equivalently replaced. Without departing from the spirit and scope of the technical solutions of the present application.

Claims

A side-emitting flat panel lamp, comprising a frame body, a light source arranged in the frame body, an exit panel and a light guide plate, the bottom of the frame body is provided with a light exit port; the exit panel and the light guide plate are arranged at the The bottom of the frame body is stacked upward in sequence; the light source is arranged on the side wall of the frame body, and is located on the side of the light guide plate, and there is a gap between the light source and the light guide plate; the side light-emitting flat plate The lamp further includes a reflective strip, which is arranged on the frame body and located below the light source, extends to below the light-emitting surface of the light guide plate along a direction away from the light source, and is connected to the light guide plate. Light plates are parallel.
The side-emitting flat panel lamp according to claim 1, wherein the reflection strip is located on a side of the exit panel close to the light source, and the height of the upper surface of the reflection strip on the frame body is not lower than The height of the upper surface of the exit panel on the frame body.
The side-emitting flat panel light according to claim 1, wherein the side-emitting flat panel light further comprises a blocking rib, and the blocking rib is disposed between the light source and the exit panel, upward from the bottom of the frame body Protrusions for positioning the reflective strips.
The side-emitting flat panel light according to claim 3, wherein the reflection strip is fixed between the PCB board where the light source is located and the retaining rib, and extends from below the light source to below the light emitting surface of the light guide plate .
The side-emitting flat panel light according to claim 3, wherein the emission panel is disposed on the side of the blocking rib away from the light source, and the height of the upper surface of the emission panel on the frame body is not high at the height of the rib.
The side-emitting flat panel light according to claim 1, wherein the frame body is further provided with a reflective layer, the reflective layer is arranged on the side of the backlight surface of the light guide plate, and the size of the reflective layer is larger than the size of the According to the size of the light guide plate, the part of the reflective layer larger than the light guide plate extends to the top of the light source in the direction of the light source.
The side-emitting flat panel light according to claim 6, wherein the side-emitting flat panel light further comprises a back panel, the back panel is disposed above the reflective layer, and the back panel is on top of the frame body fixedly connected with the frame body.
The side-emitting flat panel light of claim 1, wherein the side-emitting flat panel light further comprises a diffuser film disposed between the exit panel and the light guide plate.
The side-emitting flat panel light according to claim 7, wherein the side-emitting flat panel light further comprises a pearl cotton pad, and the pearl cotton pad is arranged between the reflective layer and the back panel.
The side-emitting flat panel light of claim 1, wherein the exit panel is a prism panel or a diffuser panel.