Panel lamp

Abstract

The invention provides a panel lamp. The panel lamp comprises a box body; the light emitting plate is mounted on one side of the box body in the height direction; the back plate is mounted on the other side of the box body in the height direction; the light condensing and polarizing layer is mounted in the box body and is positioned between the light emitting plate and the back plate; the light source is installed on the inner side wall of the box body and located on the side, close to the back plate, of the light gathering and polarizing layer. The condensing lens is mounted on the light emitting side of the light source; light rays emitted by the light source are obliquely emitted to the light condensing and polarizing layer after passing through the light condensing lens, and are emitted through the light condensing and polarizing layer and the light emitting plate; the light gathering and polarizing layer is used for refracting and totally reflecting light rays obliquely emitted by the light source towards the light emitting plate. The light emitted by the light source can be controlled to be refracted and totally reflected towards the light emitting plate by adopting the light condensing and polarizing layer, so that the light emitted to the light emitting plate keeps a small scattering angle, and when the light penetrates through the light emitting plate, scattered light can be controlled, glare can be reduced, and visual comfort can be improved.

Description

Technical Field

[0001] This application belongs to the field of lighting fixture technology, and more specifically, relates to a panel light. Background Technology

[0002] Panel lights are a common type of lighting fixture in the industry. They are simple in structure, emit light uniformly from their surface, and are widely used. However, existing panel lights typically employ a uniform surface light emission pattern, emitting diffused light. A large amount of diffused light shines towards the light-emitting side, failing to illuminate relatively small work areas, resulting in low light utilization. Furthermore, the light emitted by such panel lights can enter the eyes from multiple directions, easily producing glare. Summary of the Invention

[0003] The purpose of this application is to provide a panel light to solve the technical problem in the prior art that panel lights cannot illuminate a relatively small working area and have low light utilization.

[0004] To achieve the above objectives, the technical solution adopted in this application is: to provide a panel light, comprising: Box; A light-emitting plate is installed on one side of the housing along its height direction; A back panel is installed on the other side of the enclosure along its height direction; A light-concentrating polarizing layer is installed inside the housing, and the light-concentrating polarizing layer is located between the light-emitting plate and the back plate; A light source is installed on the inner wall of the housing, and the light source is located on the side of the focusing polarizing layer near the back plate; A condenser lens is used to control the light emitted by the light source to converge toward the condenser polarizing layer. The condenser lens is installed on the light-emitting side of the light source. The light emitted by the light source is obliquely directed towards the light-concentrating polarizing layer after passing through the light-concentrating lens, and then exits through the light-concentrating polarizing layer and the light-emitting plate; the light-concentrating polarizing layer is used to refract and totally reflect the light obliquely incident by the light source toward the light-emitting plate.

[0005] In this embodiment, the use of a focusing polarizing layer controls the refraction and total internal reflection of light emitted from the light source towards the light-emitting plate. This maintains a small scattering angle for the light directed towards the light-emitting plate, which helps control scattered light, reduce glare, and improve visual comfort as the light passes through the plate. This allows the panel light's emission area to concentrate on illuminating the work area, improving light utilization and increasing the light intensity in the work area. This also increases the difference in brightness between the work and non-work areas, enhancing the layering of light distribution. Furthermore, because the scattering angle of the panel light is relatively small and the direction of light emission is relatively concentrated, this helps reduce the area and angle of glare.

[0006] In one embodiment of this application, the light source is installed at one end of the housing along the width direction, and the light emission direction of the light source is inclined from the end of the housing near the light source to the end of the housing away from the light source toward the light-gathering polarizing layer.

[0007] By employing the above-mentioned technical means, it is beneficial to control the light emitted by the light source to illuminate the light-concentrating polarizing layer, reduce the diffusion of the light emitted by the light source, and increase the illumination intensity of the incident light on the light-concentrating polarizing layer.

[0008] In one embodiment of this application, the light source includes a plurality of LEDs arranged along the length of the housing, and the focusing lens includes a plurality of focusing elements, each of which corresponds one-to-one with a plurality of LEDs; and / or, The number of light sources is two sets, and the two sets of light sources are located at both ends of the box along the width direction, and each set of light sources is arranged along the length direction of the box; the number of condensing lenses is two sets, and the two sets of condensing lenses correspond one-to-one with the two sets of light sources.

[0009] By adopting the above-mentioned technical means, it is beneficial to improve the light intensity and the uniformity of the light distribution along the length of the box; it also helps to increase the light intensity and improve the uniformity of the light distribution along the width of the box in the light-concentrating polarizing layer.

[0010] In one embodiment of this application, the light-concentrating polarizing layer includes a substrate and a thin film layer disposed on one side of the substrate. The substrate is connected to the housing and is disposed parallel to the light-emitting plate. The thin film layer is provided with a micro-protrusion structure. Light rays from the side of the light-concentrating polarizing layer away from the light-emitting plate are refracted and totally reflected by the micro-protrusion structure and then directed toward the light-emitting plate.

[0011] By employing the above-mentioned technical means, it is possible to control the incident light to refract towards the light-emitting plate after passing through the light-concentrating polarizing layer, and it is also beneficial to reflect the light on the side of the light-emitting plate.

[0012] In one embodiment of this application, the micro-protrusion structure includes a plurality of protrusions, which are arranged along the width direction of the housing and extend along the length direction of the housing.

[0013] By employing the above-mentioned technical means, it is beneficial to ensure that the emitted light from the focusing polarizing layer is evenly distributed along the width direction of the box.

[0014] In one embodiment of this application, the cross-section of the protruding ridge is triangular, trapezoidal, arc-shaped, or triangular-like.

[0015] By employing the aforementioned technical means, light can be refracted and totally reflected towards the light-emitting plate.

[0016] In one embodiment of this application, the thin film layer is located on the side of the substrate closer to the light source, and the micro-bump structure is located on the side of the thin film layer away from the substrate.

[0017] By adopting the above-mentioned technical means, it is more conducive to improving the light incident efficiency of the light-concentrating polarizing layer and better meeting the total internal reflection conditions.

[0018] In one embodiment of this application, a secondary light distribution structure is provided on the light-emitting surface of the condensing lens, the secondary light distribution structure being used to diffuse light along the length direction of the housing; The secondary light distribution structure includes multiple stripe structures arranged along the length direction of the condenser lens, and each stripe structure extends along the width direction of the condenser lens.

[0019] By employing the above-mentioned technical means, secondary light distribution can be achieved, which helps to improve the uniformity of incident light illumination along the length of the box in the light-concentrating polarizing layer.

[0020] In one embodiment of this application, the light-emitting surface of the condensing lens is provided with a frosted structure, which is used to mix the light emitted from the light-emitting surface of the condensing lens.

[0021] By adopting the above-mentioned technical means, it is beneficial to improve the uniformity of illumination.

[0022] In one embodiment of this application, the light-emitting plate is a transparent plate or a translucent plate; the light-emitting plate is provided with microstructure patterns for controlling the diffusion of light, and the microstructure patterns are arranged in an array; and / or, The light-emitting plate is a prism plate, a semi-transparent lens diffuser plate, or a Rayleigh scattering plate.

[0023] By employing the above-mentioned technical means, it is beneficial to improve the uniformity of illumination in local areas.

[0024] In one embodiment of this application, the housing is provided with a reflective layer.

[0025] By employing the above-mentioned technical means, it is beneficial to improve the luminous efficiency of the emitted light. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1A three-dimensional structural diagram of the panel light provided in an embodiment of this application; Figure 2 An exploded view of a panel light provided in an embodiment of this application; Figure 3 This is a partial cross-sectional view of a panel light provided in an embodiment of this application; Figure 4 for Figure 2 A three-dimensional structural diagram of a central focusing lens; Figure 5 for Figure 2 Enlarged view of a local structure of the central polarizing layer; Figure 6 A partial structural schematic diagram of a light-emitting plate provided in an embodiment of this application; Figure 7 A partial structural schematic diagram of the light-emitting plate provided in another embodiment of this application; Figure 8 This is a light path diagram of light transmission through a focusing polarizing layer in one embodiment of this application; Figure 9 This is an ideal optical path diagram that does not consider internal material scattering and reflection in this application; Figure 10 This is the actual optical path diagram of material scattering and diffuse reflection in this application.

[0028] The following are the labeling elements in the figure: 10. Enclosure; 11. Back panel; 12. Light-emitting plate; 121. Microstructure pattern; 13. Fixing strip; 20. Light source; 21. Lamp panel; 22. Lamp beads; 23. Condensing lens; 230. Condenser; 231. Secondary light distribution structure; 30. Concentrating polarizing layer; 31. Substrate; 32. Thin film layer; 321. Micro-protrusion structure. Detailed Implementation

[0029] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0030] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0031] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying 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 this application, "multiple" means two or more, unless otherwise explicitly specified.

[0033] Please refer to the following: Figures 1 to 3 The panel light provided in the embodiments of this application will now be described. The panel light includes a housing 10, a light-emitting plate 12, a back plate 11, a focusing polarizing layer 30, and a light source 20; the light-emitting plate 12 is installed on one side of the housing 10 along the height direction Z; the back plate 11 is installed on the other side of the housing 10 along the height direction Z; the focusing polarizing layer 30 is installed inside the housing 10, and the focusing polarizing layer 30 is located between the light-emitting plate 12 and the back plate 11; the light source 20 is installed on the inner side wall of the housing 10, and the light source 20 is located on the side of the focusing polarizing layer 30 near the back plate 11; the light emitted by the light source 20 is obliquely directed toward the focusing polarizing layer 30, and is emitted after passing through the focusing polarizing layer 30 and the light-emitting plate 12 in sequence; the focusing polarizing layer 30 is used to refract and totally reflect the light obliquely directed into the light source 20 toward the light-emitting plate 12.

[0034] It should be noted that the enclosure 10 can be a frame in the shape of a triangle, hexagon, circle, rectangle, or similar rectangle. The back panel 11 is located on the backlight side of the panel light, and the light-emitting plate 12 is located on the light-emitting side of the panel light. The back panel 11 and the light-emitting plate 12 can cover both sides of the enclosure 10 to prevent dust and other foreign objects from entering the enclosure 10. The focusing polarizing layer 30 can be a thin-layer structure, such as a thin plate or film. The optical axis of the light source 20 can be inclined along the length or width of the enclosure 10 towards the focusing polarizing layer 30, so that the light from the light source 20 is incident on the focusing polarizing layer 30 at an oblique angle. Figure 9As shown, the function of the focusing polarizing layer 30 is as follows: when the light emitted from the light source 20 is obliquely incident on the focusing polarizing layer 30, the light undergoes refraction, total internal reflection, and refraction in sequence before passing through the focusing polarizing layer 30 (that is, when the light enters the focusing polarizing layer 30, it can be refracted and deflected towards the light-emitting plate 12; when the light is reflected within the focusing polarizing layer 30, it can undergo total internal reflection and deflected towards the light-emitting plate 12; and when the light exits the focusing polarizing layer 30, it is refracted and incident towards the light-emitting plate 12), and is incident approximately perpendicularly to the light-emitting plate 12, so that the emitted light is approximately parallel light or a beam with a small diffusion angle. The light-emitting plate 12 can be a transparent or semi-transparent plate, and the light-emitting plate 12 is used to control the scattering angle on the light-emitting side. When the light-emitting plate 12 is a transparent plate, the scattering angle on the incident side and the light-emitting side are basically the same; when the light-emitting plate 12 is a semi-transparent plate, the scattering angle on the light-emitting side will be relatively increased.

[0035] In this embodiment, the use of a focusing polarizing layer 30 allows for the control of the refraction and total internal reflection of light emitted from the light source 20 towards the light-emitting plate 12. This maintains a small scattering angle for the light incident on the light-emitting plate 12, which helps control scattered light, reduce glare, and improve visual comfort when light passes through the light-emitting plate 12. This also allows the panel light's light-emitting area to concentrate on illuminating the working area, improving light utilization and increasing the light intensity in the working area. This increases the difference in brightness between the working and non-working areas, enhancing the layering of light distribution. Furthermore, because the scattering angle of the panel light is relatively small and the direction of light emission is relatively concentrated, this helps reduce the area and angle of glare.

[0036] In one embodiment of this application, please refer to Figures 2 to 4 The panel light also includes a focusing lens 23, which controls the light emitted from the light source 20 to converge toward the focusing polarizing layer 30. The focusing lens 23 is installed on the light-emitting side of the light source 20. After passing through the focusing lens 23, the light emitted from the light source 20 is directed at an angle toward the focusing polarizing layer 30. By using the focusing lens 23, the divergence of the light emitted from the light source 20 can be reduced, and the light can be focused within 30°, so as to control more light to illuminate the focusing polarizing layer 30, reduce the light scattering angle, and improve the light utilization rate.

[0037] Optionally, the light source 20 is installed at one end of the housing 10 along the width direction Y. The light emission direction of the light source 20 is inclined from the end of the housing 10 near the light source 20 to the end of the housing 10 away from the light source 20, towards the focusing polarizing layer 30. By placing the light source 20 on the side of the housing 10 and using the inclination of the light source 20, the light can be irradiated over a larger width area of ​​the focusing polarizing layer 30, without the need to arrange multiple rows of light sources along the width direction Y of the housing 10. This helps to reduce the number of light sources 20 and improve the uniformity of the light emitted by the panel light.

[0038] Optionally, the angle between the optical axis of the light source 20 and the focusing polarizing layer 30 is acute, and the angle between the axis of the focusing lens 23 and the focusing polarizing layer 30 is also acute; the angles between the light output axis of the light source 20 and the axis of the focusing lens 23 and the focusing polarizing layer 30 are equal. A suitable angle can be selected based on the vertical distance between the focusing polarizing layer 30 and the light source 20 in the panel light, the width of the focusing polarizing layer 30, and the parameters of the focusing lens 23 to ensure uniform light output along the width direction of the panel light. The angle between the optical axis of the light source 20 and the focusing polarizing layer 30 can be 1°-30°, allowing for control of the panel light's height.

[0039] In one embodiment of this application, please refer to Figures 2 to 4 The light source 20 includes multiple LED beads 22 arranged along the length X of the housing 10, and the condenser lens 23 includes multiple light-concentrating elements 230, each corresponding to one of the LED beads 22. This facilitates uniform light distribution along the length X of the housing 10, improving light intensity. The LED beads 22 can be LED beads, and the light-concentrating elements 230 can be TIR cup-shaped condenser lenses, convex lenses, or Fresnel condenser lenses. Adjacent light-concentrating elements 230 can be integrally formed or glued together.

[0040] In one embodiment of this application, please refer to Figures 2 to 4 There are two sets of light sources 20, located at both ends of the housing 10 along the width direction Y, and each set of light sources 20 is positioned along the length direction X of the housing 10. There are also two sets of condensing lenses 23, each corresponding to one of the two sets of light sources 20. Because the distances from the light sources 20 to the two ends of the condensing polarizing layer 30 along the width direction are inconsistent, the light distribution at both ends of the condensing polarizing layer 30 along the width direction will also have differences in intensity when the light emitted from the light sources 20 illuminates the condensing polarizing layer 30. Arranging light sources 20 at both ends of the housing 10 along the width direction Y helps to improve the uniformity of the light distribution along the width direction Y of the condensing polarizing layer 30, thus enhancing the light intensity. The width direction of the condensing polarizing layer 30 is the same as the width direction Y of the housing 10.

[0041] Optionally, the light source 20 includes a lamp panel 21 and a plurality of LEDs 22 disposed on the lamp panel 21. The lamp panel 21 is disposed along the length direction X of the housing 10, and the plurality of LEDs 22 on each lamp panel 21 are arranged along the length direction of the lamp panel 21. Each set of condensing lenses 23 may include a plurality of condensing lenses 23 arranged along the length direction X of the housing 10, or it may include a plurality of condensers 230 arranged along the length direction X of the housing 10. This can enhance the light intensity and uniformity. Moreover, the lengths of the light source 20 and the condensing lenses 23 can be easily adjusted to match panel lights of different lengths.

[0042] In one embodiment of this application, please refer to Figure 2 , Figure 3 and Figure 5 The light-concentrating polarizing layer 30 has a micro-protrusion structure 321. Light rays from the side of the light-concentrating polarizing layer 30 away from the light-emitting plate 12 are refracted and totally reflected by the micro-protrusion structure 321 before being directed toward the light-emitting plate 12. That is, when light rays are incident from the side of the micro-protrusion structure 321 closest to the light source 20, the light rays are refracted and deflected toward the light-emitting plate 12 and are directed toward the side of the micro-protrusion structure 321 away from the light source 20; the light rays are totally reflected and deflected toward the light-emitting plate 12 from the side of the micro-protrusion structure 321 away from the light source 20, and then directed toward the side of the micro-protrusion structure 321 closest to the light-emitting plate 12; the light rays are refracted and deflected toward the light-emitting plate 12 from the side of the light-concentrating polarizing layer 30 closest to the light-emitting plate 12.

[0043] Optionally, the focusing polarizing layer 30 includes a substrate 31 and a thin film layer 32 disposed on one side of the substrate 31. The substrate 31 is connected to the housing 10 and is disposed parallel to the light-emitting plate 12. The thin film layer 32 has micro-protrusion structures 321. This facilitates the processing and installation of the focusing polarizing layer 30. Specifically, the housing 10 has two support bars located at both ends along the width direction Y inside the housing 10, and each support bar extends along the length direction X of the housing 10. The substrate 31 is connected to the support bars to facilitate positioning the installation position of the focusing polarizing layer 30. Of course, in other embodiments of this application, the focusing polarizing layer 30 can also be a thin layer structure disposed on the light-incident side of the light-emitting plate 12.

[0044] Optionally, the substrate 31 can be a transparent plate, such as a glass plate, to support the thin film layer 32. Of course, in other embodiments, the substrate 31 can also be a semi-transparent plate, such as a frosted plate, which helps to improve the uniformity of light emission when light passes through the substrate 31.

[0045] In one embodiment of this application, please refer to Figure 3 and Figure 5 The micro-protrusion structure 321 includes multiple protrusions, which are arranged along the width direction Y of the housing 10 and extend along the length direction X of the housing 10. This reduces the diffusion angle of light along the width direction Y of the housing 10, making the light relatively concentrated in the width direction of the panel light, forming a directional light emission pattern across the entire surface.

[0046] In one embodiment of this application, please refer to Figures 3 to 5 The thin film layer 32 is located on the side of the substrate 31 closest to the light source 20, and the micro-protrusion structure 321 is located on the side of the thin film layer 32 away from the substrate 31. In this way, the side of the thin film layer 32 closest to the substrate 31 can be flat, which facilitates its bonding with the substrate 31.

[0047] In one embodiment of this application, please refer to Figures 3 to 5The cross-section of the convex ridge can be triangular. Light emitted from the light source 20 is refracted at the sidewall of the convex ridge near the light source 20 and incident on the inner side of the convex ridge, then deflected towards the light-emitting plate 12 and onto the sidewall of the convex ridge away from the light source 20. At the sidewall of the convex ridge away from the light source 20, the light undergoes total internal reflection and is deflected towards the light-emitting plate 12, striking the side of the focusing polarizing layer 30 near the light-emitting plate 12. The light is then refracted and deflected towards the light-emitting plate 12 at the side of the focusing polarizing layer 30 near the light-emitting plate 12 and emitted. This allows light from both light sources 20 to be refracted and totally reflected towards the light-emitting plate 12, which helps to control the scattering angle of the emitted light to be small. The cross-section of the convex ridge can be an axisymmetric shape, with its axis of symmetry located at the middle of the convex ridge along its width, thus ensuring consistent light emission from both light sources 20. Of course, in other embodiments of this application, the cross-section of the convex ridge can also be arc-shaped, trapezoidal, or triangular, etc., thus allowing the refraction and total internal reflection along the width of the convex ridge to deflect the light towards the light-emitting plate 12. Among them, a triangular shape refers to a shape whose two sides are roughly straight lines, arcs, or multiple broken lines, and the distance between the two sides gradually increases from the top to the bottom of the convex ridge. It can achieve the same or similar optical effect as a triangle.

[0048] In one embodiment of this application, please refer to Figures 2 to 4 The light-emitting surface of the focusing lens 23 is provided with a secondary light distribution structure 231, which is used to diffuse the light along the length X of the housing 10. By adopting the secondary light distribution structure 231, the light can be adjusted to a certain extent, realizing the secondary light distribution function, so that the light emitted by the light source 20 is diffused along the length X of the housing 10. When the spacing between multiple lamp beads 22 is large, the illumination areas of different lamp beads 22 overlap with each other along the length of the focusing polarizing layer 30, thereby improving the uniformity of the light source 20 along the length of the focusing polarizing layer 30.

[0049] Optionally, the secondary light distribution structure 231 includes multiple stripe structures arranged along the length of the condenser lens 23, with each stripe structure extending along the width of the condenser lens 23. The stripe structure is simple and easy to manufacture. The direction of the stripe structure is perpendicular to the direction of the micro-protrusion structure 321, ensuring that the light from the light source 20 is uniformly dispersed along the length (X) and width (Y) of the housing 10. Optionally, the stripe structure can be a rib with a triangular, arc-shaped, trapezoidal, or triangular-like cross-section, allowing light emitted from the stripe structure to diverge to both sides of the stripe structure.

[0050] In one embodiment of this application, a frosted structure is provided on the light-emitting surface of the condenser lens 23. The frosted structure is used to mix the light emitted from the light-emitting surface of the condenser lens 23. The frosted structure can cover the entire light-emitting surface of the condenser lens 23, or it can be provided on a portion of the light-emitting surface. The frosted structure is used to perform limited light mixing, controlling the emitted light to be evenly dispersed in the corresponding area. When light passes through the frosted structure and exits, the frosted structure can perform limited light mixing, which helps to improve the uniformity of illumination.

[0051] In one embodiment of this application, please refer to Figure 3 , Figure 6 and Figure 7 The light-emitting plate 12 is provided with microstructure patterns 121 for controlling the uniform dispersion of light. The microstructure patterns 121 are arranged in an array. It should be noted that the microstructure patterns 121 are used to change the emission direction of the light from a local area of ​​the light-emitting plate 12, so as to make the light uniformly dispersed. When the light rays that pass through the focusing polarizing layer 30 are directed toward the light-emitting plate 12, the light distribution is affected by the change in the emission direction of the light at the microstructure patterns 121. It does not change the light distribution by diffuse reflection. Compared with diffuse reflection, the microstructure patterns 121 can control the angle of the emitted light, so as to keep it relatively concentrated. The microstructure patterns 121 are used to mix the light rays that pass through adjacent convex ridges and adjacent stripe structures. This can make the light rays that hit the light-emitting plate 12 uniformly dispersed, and avoid the light rays from being unevenly distributed locally after passing through the micro-protrusion structure 321 and the secondary light distribution structure 231, thus affecting the optical effect.

[0052] Optionally, please refer to Figure 6 The microstructure pattern 121a on the light-emitting plate 12a is bead-shaped; please refer to Figure 7 The microstructure pattern 121b on the light-emitting plate 12b is hexagonal. Of course, the microstructure pattern 121 can also be cylindrical, triangular, quadrilateral, or pentagonal, etc. This is beneficial to improving the uniformity of light mixing and can achieve different optical effects.

[0053] Optionally, the light-emitting plate 12 can be a transparent or semi-transparent plate. This helps to reduce the loss of light intensity.

[0054] In one embodiment of this application, please refer to Figure 3 , Figure 6 and Figure 7 The light-emitting plate 12 can be a prism plate, a semi-transparent mirror diffuser plate, or a Rayleigh scattering plate. This allows for the selection of different types of light-emitting plates 12 to meet varying lighting requirements. A prism plate is an optical material with numerous microstructures on its surface, exhibiting a certain degree of light diffusion.

[0055] By adjusting the angle, form, and material of the focusing lens 20, the focusing polarizing layer 30, and the light-emitting plate 12, the technical solution provided in this application can achieve surface-oriented light emission of 10°-90°.

[0056] In one embodiment of this application, a reflective layer is provided inside the housing 10. By employing a reflective layer, it is beneficial to reflect scattered and diffused light from inside the housing 10 to the focusing polarizing layer 30 or the light-emitting plate 12, thereby improving illumination efficiency. Optionally, a reflective layer is provided on the side of the back panel 11 closest to the focusing polarizing layer 30, thus facilitating the reflection of light to the focusing polarizing layer 30. Optionally, the reflective layer can be reflective paper, a white coating, a mirror coating, etc., thereby achieving light reflection.

[0057] Optionally, the inner wall of the enclosure 10 slopes outward from the backlight side to the light-emitting side. That is, the opening on the light-emitting side of the enclosure 10 is large, the opening on the backlight side is small, and the inner wall is sloped, which is beneficial for reflecting light towards the light-emitting side.

[0058] In one embodiment of this application, please refer to Figures 1 to 3 The housing 10 contains a positioning plate and a fixing strip 13 detachably connected to the positioning plate. The fixing strip 13 cooperates with the positioning plate to clamp the light-emitting plate 12. The fixing strip 13 has a side plate extending towards the support strip, and the side plate is provided with a reflective layer. The reflective layer can be a white diffuse layer, an aluminum foil layer, or a mirror-like light-emitting layer, etc. This facilitates the reflection of light illuminating the side wall of the housing 10 between the light-concentrating polarizing layer 30 and the light-emitting plate 12, thereby improving light utilization. Optionally, the side plate is inclined from the light-emitting plate 12 to the center of the light-concentrating polarizing layer 30 in the width direction Y near the housing 10, which helps to reflect light to the light-emitting plate 12.

[0059] See also Figure 9 and Figure 10 , Figure 9 The ideal optical path diagram for a panel light, without considering the scattering and reflection of internal materials, shows that its emitted light has a relatively small divergence angle, which can produce a concentrated illumination area. Figure 10 The actual light path diagram of the existing panel light, including material scattering and diffuse reflection, shows that although there will be some scattering in the actual panel light, the main light intensity is distributed in the ideally designed area, which can control the scattered light, reduce glare, and improve visual comfort.

[0060] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A panel light, characterized in that, include: Box; A light-emitting plate is installed on one side of the housing along its height direction; A back panel is installed on the other side of the enclosure along its height direction; A light-concentrating polarizing layer is installed inside the housing, and the light-concentrating polarizing layer is located between the light-emitting plate and the back plate; A light source is installed on the inner wall of the housing, and the light source is located on the side of the focusing polarizing layer near the back plate; A condenser lens is used to control the light emitted by the light source to converge toward the condenser polarizing layer. The condenser lens is installed on the light-emitting side of the light source. The light emitted by the light source is obliquely directed towards the light-concentrating polarizing layer after passing through the light-concentrating lens, and then exits through the light-concentrating polarizing layer and the light-emitting plate; the light-concentrating polarizing layer is used to refract and totally reflect the light obliquely incident by the light source toward the light-emitting plate.

2. The panel light as described in claim 1, characterized in that: The light source is installed at one end of the housing along its width, and the light emission direction of the light source is inclined from the end of the housing near the light source to the end of the housing away from the light source toward the light-gathering polarizing layer.

3. The panel light as described in claim 2, characterized in that: The light source includes a plurality of LEDs arranged along the length of the housing; the focusing lens includes a plurality of focusing elements, each of which corresponds one-to-one with a plurality of LEDs; and / or, The number of light sources is two sets, and the two sets of light sources are located at both ends of the box along the width direction, and each set of light sources is arranged along the length direction of the box; the number of condensing lenses is two sets, and the two sets of condensing lenses correspond one-to-one with the two sets of light sources.

4. The panel light as described in claim 1, characterized in that: The light-concentrating polarizing layer includes a substrate and a thin film layer disposed on one side of the substrate. The substrate is connected to the housing and is disposed parallel to the light-emitting plate. The thin film layer has a micro-protrusion structure. Light rays from the side of the light-concentrating polarizing layer away from the light-emitting plate are refracted and totally reflected by the micro-protrusion structure and then directed toward the light-emitting plate.

5. The panel light as described in claim 4, characterized in that: The micro-protrusion structure includes multiple protrusions, which are arranged along the width direction of the box body and extend along the length direction of the box body.

6. The panel light as described in claim 5, characterized in that: The cross-section of the protruding ridge is triangular, trapezoidal, arc-shaped, or triangular-like.

7. The panel light as described in claim 4, characterized in that: The thin film layer is located on the side of the substrate closer to the light source, and the micro-bump structure is located on the side of the thin film layer away from the substrate.

8. The panel light as described in claim 1, characterized in that: The light-emitting surface of the condensing lens is provided with a secondary light distribution structure, which is used to diffuse the light along the length of the housing. The secondary light distribution structure includes multiple stripe structures arranged along the length direction of the condenser lens, and each stripe structure extends along the width direction of the condenser lens.

9. The panel light as described in claim 1, characterized in that: The light-emitting surface of the condensing lens is provided with a frosted structure, which is used to mix the light emitted from the light-emitting surface of the condensing lens.

10. The panel light according to any one of claims 1 to 9, characterized in that: The light-emitting plate is a transparent or semi-transparent plate; the light-emitting plate is provided with microstructure patterns for controlling the diffusion of light, and the microstructure patterns are arranged in an array; and / or, The light-emitting plate is a prism plate, a semi-transparent lens diffuser plate, or a Rayleigh scattering plate.

11. The panel light according to any one of claims 1 to 9, characterized in that: The box is equipped with a reflective layer.

Images