CN213542189U

CN213542189U - Optical prism plate, LED panel lamp and LED down lamp

Info

Publication number: CN213542189U
Application number: CN202021995802.8U
Authority: CN
Inventors: 杨静
Original assignee: Signify Holding BV
Current assignee: Signify Holding BV
Priority date: 2020-09-11
Filing date: 2020-09-11
Publication date: 2021-06-25
Anticipated expiration: 2030-09-11

Abstract

The utility model belongs to the technical field of lighting apparatus, especially, relate to an optical prism board, LED panel light, LED down lamp. The optical prism plate comprises a plate main body and a plurality of optical microstructures, wherein the plate main body is provided with a first side face and a second side face which are opposite, the first end of each optical microstructure is connected to the first side face, the second end of each optical microstructure is a free end, the second side face is a plane, the bottom face of each optical microstructure, which is connected with the first side face, is a regular triangle, the cross-sectional area of each optical microstructure is gradually reduced from the first end to the second end, the included angle formed by the three edges of each optical microstructure and the bottom face of the regular triangle is beta, and the beta is within the range of 5 degrees to 25 degrees. The technical scheme is applied to solve the technical problem that the design and processing difficulty of the optical microstructure adopted on the optical prism plate applied in the existing panel lamp is still relatively high.

Description

Optical prism plate, LED panel lamp and LED down lamp

Technical Field

The utility model belongs to the technical field of lighting apparatus, especially, relate to an optical prism board, LED panel light, LED down lamp.

Background

In indoor environmental lighting, the lamp is required to meet functional lighting and simultaneously has the functional characteristics of anti-glare, high lighting efficiency, comfort and the like. In general, glare is represented by a value of Unified Glare Rating (UGR). In daily indoor ambient lighting, the comfort of lighting is increasingly important. The lighting comfort relates to the minimum lighting level and to the degree of glare and interference to humans by the light emitting parts of the lighting device, and the lighting level should be as low as possible.

Generally, lighting devices for providing indoor ambient lighting are ceiling-mounted, such as existing panel lights and direct-lit downlights.

For the direct down lamp, when the luminous flux of the light source is small, the direct down lamp basically cannot generate the condition of light glare; when luminous flux of the light source is increased, the direct down type down lamp can generate light dazzling. Aiming at the direct down type down lamp with large luminous flux, the light source light of the direct down type down lamp is generally controlled by designing modes such as the reflecting tube wall of the down lamp and the wide light emitting angle of the lamp tube, so that the anti-dazzle purpose is achieved, and the existing direct down type down lamp does not have the design situation of being equipped with an optical prism plate for anti-dazzle.

In addition, the existing panel light is generally used in places such as halls, markets, offices and the like which require high illumination brightness, so that the light flux ratio of light emitted by the panel light is high, and the situation of light glare generally exists. Some existing panel lamps are equipped with an optical prism sheet to uniformly distribute light generated from a light source, guide the light generated from the light source to a specific direction, and shield a high-luminance light-exiting portion, thereby achieving an anti-glare purpose. The optical microstructures on these known optical prism sheets adopt a quadrangular pyramid-shaped structure, a quadrangular frustum-shaped structure, a pentagonal pyramid-shaped structure, a hexagonal frustum-shaped structure, and a composite structure formed by combining a frustum and a hemisphere (for example, the composite structure is a sphere with a smooth transition at the top of the frustum). In the spatial three-dimensional structure, the smaller the number of edges and the number of surfaces of the spatial three-dimensional structure, the smaller the difficulty in designing and processing the spatial three-dimensional structure. Therefore, for applying the optical microstructures such as a rectangular pyramid, a pentagonal pyramid, and a hexagonal pyramid on the optical prism plate, there is still a design possibility that the processing difficulty of the optical microstructures can be further reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an optical prism board, LED panel light, LED down lamp aim at solving the technical problem that the design processing degree of difficulty of the optical microstructure who adopts on the optical prism board of using in the current panel light is still relatively high.

In order to achieve the above object, the utility model adopts the following technical scheme: an optical prism plate comprises a plate main body, wherein the plate main body is provided with a first side face and a second side face which are opposite, the optical prism plate further comprises a plurality of optical microstructures, the first end of each optical microstructure is connected to the first side face, the second end of each optical microstructure is a free end, the second side face is a plane, the bottom face of each optical microstructure, which is connected with the first side face, is a regular triangle, the cross sectional area of each optical microstructure is gradually reduced from the first end to the second end, included angles formed by three edges of each optical microstructure and the bottom face of the regular triangle are beta, and the beta is within the range of 5 degrees to 25 degrees.

Optionally, the regular triangle bottom surfaces of any two adjacent optical microstructures have a common edge therebetween.

Optionally, each optical microstructure is triangular pyramid; alternatively, each optical microstructure is in the shape of a triangular pyramid.

Optionally, the heights of the optical microstructures are equal from the first end to the second end, and the height of each optical microstructure is smaller than the thickness of the plate body.

Optionally, both the plate body and the optical microstructures are made of glass, polymethylmethacrylate, polycarbonate, polystyrene, polyethylene terephthalate or polypropylene.

According to the utility model discloses a further aspect provides a LED panel light. Specifically, this LED panel light includes the lamp body, the LED light source, the light guide plate, the reflector panel, first optical prism board, diffuser plate and driver, the lamp body has assembly space and light-emitting mouth, the LED light source, the light guide plate, reflector panel and diffuser plate are all installed in assembly space, first optical prism board assembly is at the light-emitting mouth, the light guide plate has the light-emitting face, the back and goes into the light side, the LED light source sets up in going into the light side, the reflector panel pastes and covers in the back, the diffuser plate sets up between light guide plate and first optical prism board, it faces the diffuser plate to go out the light face, LED light source and driver electric connection, wherein, first optical prism board is aforementioned optical prism board.

According to another aspect of the utility model, a LED down lamp is provided. Specifically, this LED down lamp includes the casing, the LED unit, energy supply device, diffusion piece and second optical prism board, the casing has accommodation space and exit port, the LED unit, energy supply device all installs in accommodation space, the second optical prism board is installed in the exit port, the diffusion piece assembly is between LED unit and second optical prism board, the diffusion piece is connected with the casing, form the air gap between diffusion piece and the second optical prism board, the LED unit is with energy supply device electric connection, wherein, the second optical prism board is aforementioned optical prism board.

According to the utility model discloses an on the other hand provides another kind of LED down lamp. Specifically, this LED down lamp includes casing, LED unit, energy supply device and second optical prism board, and the casing has accommodation space and exit port, and LED unit, energy supply device are all installed in accommodation space, and second optical prism board is installed in the exit port, LED unit and energy supply device electric connection, and wherein, second optical prism board is aforementioned optical prism board.

The utility model discloses following beneficial effect has at least:

use the utility model provides an optical prism board assembly is in the illumination lamps and lanterns, and light propagates and the light-emitting illumination through this optical prism board. Because the optical microstructures are arranged on the first side surface of the optical prism plate, specifically, the bottom surface of each optical microstructure is designed to be a regular triangle, the cross sectional area of each optical microstructure is gradually reduced from the first end to the second end, and an included angle beta formed by three edges of each optical microstructure and the bottom surface of the regular triangle is more than or equal to 5 degrees and less than or equal to 25 degrees. Also, the utility model discloses an optical microstructure on the optical prism board is with the triangular prism to carry out further concrete design for space spatial three-dimensional structure's design basis and according to the anti-dazzle requirement, for prior art optical prism board that designs optical microstructure with rectangular pyramid, pentagonal pyramid, hexagonal pyramid as space three-dimensional structure's design basis, the utility model discloses an optical prism board's optical microstructure's space three-dimensional structure is simpler, and the design degree of difficulty obtains relative reduction to optical microstructure's the processing degree of difficulty also correspondingly obtains relative reduction, makes the utility model discloses an optical prism board can further go forward batch production, reduces processing manufacturing cost. And, will the utility model discloses an optical prism board assembly is in lighting apparatus, and light propagates through the optics micro-structure on the optical prism board and realizes controlling light, for not carrying out the lighting apparatus who controls light to light, can reduce the UGR value of illumination, has reduced the glaring dazzling influence of illumination light pair people's eyes, is favorable to protecting eyes healthy.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic perspective view of an optical prism plate according to a first embodiment of the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

fig. 5 is a schematic perspective view of an optical microstructure in an optical prism plate according to a first embodiment of the present invention;

fig. 6 is a schematic structural diagram of two optical microstructures having a common edge in an optical prism plate according to a first embodiment of the present invention;

fig. 7 is a schematic diagram illustrating an array-directional structure of optical microstructures of an optical prism plate according to a first embodiment of the present invention;

fig. 8 is a schematic perspective view of an optical prism plate according to a second embodiment of the present invention;

FIG. 9 is a front view of FIG. 8;

FIG. 10 is a top view of FIG. 9;

FIG. 11 is a cross-sectional view taken along line B-B of FIG. 10;

fig. 12 is a schematic perspective view of an optical microstructure in an optical prism plate according to a second embodiment of the present invention;

fig. 13 is a schematic structural diagram of two optical microstructures having a common edge in an optical prism plate according to a second embodiment of the present invention;

fig. 14 is a schematic diagram illustrating an array-directional structure of optical microstructures of an optical prism plate according to a second embodiment of the present invention;

fig. 15 is a schematic view of an internal structure of a panel light provided by the present invention;

fig. 16 is a schematic view of an internal structure of a first down lamp provided by the present invention;

fig. 17 is a schematic view of an internal structure of a second down lamp provided by the present invention;

FIG. 18 is a graph of strength when no optical prism sheet is assembled using a downlight experiment;

FIG. 19 is a graph of the intensity of a down lamp experiment using a diffuser mated to an optical prism plate at an angle β of 25 °;

fig. 20 is a graph of intensity when a down lamp experiment is performed using a diffuser and an optical prism plate fitted together, and the angle β of the optical prism plate is 15 °;

fig. 21 is a graph showing the strength when the diffuser and the optical prism plate are engaged and the angle β of the optical prism plate is 5 ° in a downlight experiment.

Wherein, in the figures, the respective reference numerals:

10. a plate main body; 101. a first side surface; 102. a second side surface; 11. an optical microstructure; 201. a lamp housing; 202. an LED light source; 203. a light guide plate; 204. a reflector; 205. a first optical prism sheet; 206. a diffusion plate; 301. a housing; 3011. a diffuse reflective shell wall; 3012. a specular reflector shell wall; 302. an LED unit; 303. an energy supply device; 304. a diffusion sheet; 305. a second optical prism sheet; 306. a surface ring.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", etc. 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," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Optical prism sheet of the first embodiment:

as shown in fig. 1 to 5, the utility model discloses a first embodiment provides an optical prism board, is applied to illumination lamps and lanterns light-emitting with this optical prism board, can reduce the direct glare that illumination lamps and lanterns exist to reduce the UGR value of illumination, make light of illumination more comfortable. The optical prism plate comprises a plate main body 10 and a plurality of optical microstructures 11, wherein the plate main body 10 is provided with a first side surface 101 and a second side surface 102 which are opposite, a first end of each optical microstructure 11 is connected to the first side surface 101, a second end of each optical microstructure 11 is a free end, the second side surface 102 is a plane (namely, the second side surface 102 is a mirror surface), the bottom surfaces of the optical microstructures 11, which are connected with the first side surface 101, are regular triangles, the cross-sectional area of each optical microstructure 11 is gradually reduced from the first end to the second end, the optical microstructures 11 are distributed in an array, the included angles between three edges of each optical microstructure 11 and the bottom surface of each regular triangle are beta, and the beta is within the range of 5 degrees to beta and is less than or equal to 25 degrees.

Use the utility model provides an optical prism board assembly is in the illumination lamps and lanterns, light propagates through this optical prism board and the illumination of light-emitting, because optical microstructure 11 is being arranged on first side 101 of this optical prism board, the bottom surface of specifically designing optical microstructure 11 is regular triangle, the cross-sectional area of optical microstructure 11 reduces gradually in the direction from its first end to second end to three edges and the regular triangle bottom surface of each optical microstructure 11 become contained angle beta and are less than or equal to within the beta 25 within the scope 5. Also, the utility model discloses an optics microstructure 11 on the optics prism board is with the triangular pyramid as space spatial three-dimensional structure's design basis and according to the anti-dazzle requirement go on further concrete design, for prior art's the optics prism board of design basis design optics microstructure that uses rectangular pyramid, pentagonal pyramid, hexagonal pyramid as space three-dimensional structure, the utility model discloses an optics prism board's optics microstructure 11's space three-dimensional structure is simpler, and the design degree of difficulty obtains reducing relatively to optics microstructure 11's the processing degree of difficulty also correspondingly obtains reducing relatively, makes the utility model discloses an optics prism board can further go on batch production, reduces processing manufacturing cost. And, will the utility model discloses an optical prism board assembly is in lighting apparatus, and light propagates through optical microstructure 11 on the optical prism board and realizes controlling light, for not carrying out the lighting apparatus who controls light to light, can reduce the UGR value of illumination, has reduced the lighting light to dazzling influence of people's eyes, improves illumination comfort level, is favorable to protecting eyes healthy.

As shown in fig. 1 and fig. 3, on the first side surface 101 of the optical prism plate, a common edge is formed between the regular triangle bottom surfaces of any two adjacent optical microstructures 11, that is, all the optical microstructures 11 are arranged adjacently in sequence, so that the optical microstructures 11 on the first side surface 101 are arranged compactly, and the light control function can be realized on the passing light, thereby achieving the purpose of reducing the UGR value of illumination.

Preferably, each optical microstructure 11 is a triangular pyramid. As shown in fig. 6, the two triangular pyramidal optical microstructures 11 having a common side are mirror images about the axis OO ', and the two mirror image optical microstructures 11 form a unit group and are arranged in an array along the direction of arrow a ' and the direction of arrow B ' with reference to the unit group, as shown in fig. 7.

In addition, any two adjacent optical microstructures 11 may also be arranged not to have a common side, and still be designed such that two optical microstructures 11 form a unit group, two optical microstructures 11 of the unit group are still mirror images, and the two optical microstructures 11 are directly spaced apart by a distance much smaller than the length of any side of the bottom surface of the triangle, and then are arranged in an array along the direction of arrow a 'and the direction of arrow B' with reference to the unit group.

In the process of manufacturing the optical prism sheet, the sheet main body 10 and each optical microstructure 11 may be integrally formed by a mold, that is, an injection molding process, wherein the injection molding process includes: traditional mold injection molding and electroforming mold injection molding; or the composite material is prepared by adopting a hot-press forming process, wherein the hot-press forming process comprises the following steps: traditional mould hot briquetting, electroforming mould hot briquetting and roller mould hot briquetting. Wherein, the utility model discloses the preferred electroforming mould hot briquetting or roller mould hot briquetting that adopts prepares this optical prism board. In the process of preparing the optical prism plate by adopting a roller die for hot press molding, a plate-shaped blank is heated, a roller is simultaneously heated, a die concave-convex structure corresponding to the optical microstructure 11 is arranged on the roller, and the blank is hot pressed by the roller to be molded into the optical prism plate.

Generally, the height of each optical microstructure 11 is smaller than the thickness of the plate main body 10, so that the overall strength of the optical prism plate can be further ensured on the basis of ensuring the reduction of glare and the reduction of the UGR value of emergent illumination. The thickness of the plate body 10 should be properly selected to ensure the overall strength and make the optical prism plate as thin as possible.

The side length of the regular triangle at the bottom of each optical microstructure 11 is in a range of about 0.2mm to 1.0mm, and preferably 0.5 mm. The smaller the optical microstructures 11, the denser the optical microstructures 11 on the second side 102, the better the overall texture of the optical prism sheet. Certainly, the size of the optical microstructure 11 may also be larger, for example, the side length of the regular triangle on the bottom surface of the optical microstructure 11 is about 2.0mm, and accordingly the volume of the optical microstructure 11 is relatively increased, which also has the anti-glare effect, but the texture of the optical prism plate is rough, and the graininess is strong.

In the first embodiment, the plate body 10 and the optical microstructures 11 are made of glass, polymethyl methacrylate (PMMA), Polycarbonate (PC), Polystyrene (PS), Polyethylene (PE), polyethylene terephthalate (PET), or polypropylene (PP).

Optical prism sheet of the second embodiment:

as shown in fig. 8 to 14, it shows a schematic structural diagram of an optical prism plate according to a second embodiment of the present invention. The optical prism sheet of the second embodiment has the following differences compared with the optical prism sheet of the first embodiment.

In the optical prism sheet of the second embodiment, each optical microstructure 11 is in the shape of a triangular pyramid. That is, in the second embodiment, the sharp tip of each of the triangular pyramid-shaped optical microstructures 11 in the first embodiment is cut or polished to be flat-topped to form a triangular pyramid shape, and at this time, the flat top planes of each of the optical microstructures 11 are located on the same plane, as shown in fig. 9 and 11. Thus, the line lines of the optical prism plate are more unique and beautiful when being observed from the outside, as shown in fig. 8 and 10, and the sharp top of the triangular pyramid-shaped optical microstructure is prevented from scratching people.

As shown in fig. 13, in the second embodiment, two adjacent optical microstructures 11 having a common side are mirror images about the axis ab, and the two optical microstructures 11 form a unit group and are arranged in an array along the arrow a 'direction and the arrow b' direction with reference to the unit group, as shown in fig. 14.

Compared with the optical prism plate of the first embodiment, the optical prism plate of the second embodiment has the same structure except for the above structure, and thus, the description thereof is omitted.

According to another aspect of the present invention, as shown in fig. 15, there is provided an LED panel lamp. Specifically, the LED panel lamp includes a lamp housing 201, an LED light source 202, a light guide plate 203, a light reflecting plate 204, a first optical prism plate 205, a light diffusing plate 206, and a driver, the lamp housing 201 has an assembly space and a light outlet, the LED light source 202, the light guide plate 203, the light reflecting plate 204, and the light diffusing plate 206 are all installed in the assembly space, and the driver may be assembled in the assembly space or attached to an outer sidewall of the lamp housing 201, the LED panel lamp is a side light emitting panel lamp. Specifically, in the LED panel lamp, the first optical prism plate 205 is assembled at the light outlet, the light guide plate 203 has a light outlet surface, a back surface and a light inlet side surface, the LED light source 202 is disposed at the light inlet side surface, the light reflecting plate 204 is attached to the back surface, the diffusion plate 206 is disposed between the light guide plate 203 and the first optical prism plate 205, an air gap is formed between the diffusion plate 206 and the first optical prism plate 205, the light outlet surface directly faces the first optical prism plate 205, and the LED light source 202 is electrically connected to the driver, wherein the first optical prism plate 205 is the aforementioned optical prism plate.

Use the utility model provides an optical prism board assembly is in the luminous LED panel light of side, light shines through the optical prism board propagation after the emergence from light guide plate 203 through diffuser plate 206, then the light-emitting illumination, because optical microstructure 11 is being arranged on this optical prism board's the first side 101, concretely, the bottom surface of design optical microstructure 11 is regular triangle, and the cross-sectional area of optical microstructure 11 reduces gradually in the direction from its first end to second end, and three edges of each optical microstructure 11 become contained angle beta with the regular triangle bottom surface within the scope 5 beta is not more than 25. The utility model discloses an optics microstructure 11 on the optics prism board that LED panel light used is with the triangular pyramid as space spatial structure's design basis and according to the anti-dazzle requirement further concrete design, for prior art with the rectangular pyramid, the pentagonal pyramid, the optics prism board of hexagonal pyramid for space spatial structure's design basis design optics microstructure, the space spatial structure of the optics microstructure 11 of this optics prism board is simpler, the design degree of difficulty obtains relative reduction, and the processing degree of difficulty of optics microstructure 11 also correspondingly obtains relative reduction, make the optics prism board can batch production, reduce processing manufacturing cost. And, will the utility model discloses an optical prism board assembly is in lighting apparatus, and light propagates through optical microstructure 11 on the optical prism board and realizes controlling light, for not carrying out the lighting apparatus who controls light to light, can reduce the UGR value of illumination, has reduced the glaring influence of illumination light pair people's eyes, is favorable to protecting eyes healthy.

According to the utility model discloses a still another aspect can be applied to LED down lamp with this aforementioned optical prism board and carry out the light-emitting illumination. As shown in fig. 16, it shows the internal structure of the first LED tube light of the present invention, the LED tube light includes a housing 301, an LED unit 302, an energy supply device 303, a diffusion sheet 304 and a second optical prism plate 305, the housing 301 has an accommodating space and an exit port, the LED unit 302, the energy supply device 303 and the diffusion sheet 304 are all installed in the accommodating space, the second optical prism plate 305 is installed in the exit port, the diffusion sheet 304 is assembled between the LED unit 302 and the second optical prism plate 305, the diffusion sheet 304 is connected to the housing 301, an air gap is formed between the diffusion sheet 304 and the second optical prism plate 305, the LED unit 302 is electrically connected to the energy supply device 303, wherein the second optical prism plate 305 is the aforementioned optical prism plate. A face ring 306 is provided at the edge of the exit port of the housing 301, and when the LED tube lamp is mounted on a ceiling or a wall, the face ring 306 is attached to the ceiling surface or the wall surface.

Use the utility model provides an optical prism board assembly is in the LED down lamp, and the down lamp for prior art does not assemble optical prism board's project organization, the utility model discloses an increase in the LED down lamp and assembled second optical prism board 305 to carry out accuse light through second optical prism board 305 to light source light, thereby realize the purpose of anti-dazzle. In the lighting process of the LED tube light, light is emitted from the light guide plate 203, passes through the diffusion sheet 304, and then is irradiated through the optical prism plate to be transmitted to the light source, and the optical microstructures 11 are arranged on the first side surface 101 of the optical prism plate, specifically, the bottom surfaces of the optical microstructures 11 are designed to be regular triangles, the cross-sectional areas of the optical microstructures 11 are gradually reduced in the direction from the first end to the second end, and an included angle β between three edges of each optical microstructure 11 and the bottom surface of the regular triangle is within a range of 5 ° β to 25 °. The utility model discloses an optical microstructure 11 on the optical prism board of using in the LED down lamp is with the triangular prism to carry out further concrete design for space spatial structure's design basis and according to the anti-dazzle requirement, for prior art with rectangular pyramid, pentagonal pyramid, hexagonal pyramid as space spatial structure's design basis design optical microstructure's optical prism board, the utility model discloses an optical prism board's optical microstructure 11's space spatial structure is simpler, and the design degree of difficulty obtains reducing relatively to optical microstructure 11's the processing degree of difficulty also correspondingly obtains reducing relatively, makes the utility model discloses an optical prism board can batch production, reduces processing manufacturing cost.

In the LED tube light, specifically, the diffusion sheet 304 is connected to the inner wall of the housing 301, and the light emitted from the LED unit 302 is first optically guided and propagated by the diffusion sheet 304 to be homogenized, and then condensed by the optical prism plate to emit light for illumination, so as to reduce the light emitted in a large angle direction, and achieve the purpose of making the light emitted for illumination softer and more comfortable. In the LED tube light, the second side surface 102 of the optical prism plate is a light incident side, and the optical microstructure 11 on the first side surface 101 is a light emergent side. The light-emitting side of diffuser 304 is spaced from second side 102 of the optical prism sheet; alternatively, the peripheral edge of the light exit side of the diffuser 304 is fixed against the opposite axial edge of the second side 102 of the optical prism plate by ultrasonic welding. Thus, an air gap is formed between the diffusion sheet 304 and the optical prism sheet, which does not affect the optical effect and facilitates the assembly.

In the experimentation of this LED down lamp of design assembly, use 3.5 inches's LED down lamp inspection the utility model provides an optical prism board is applied to the accuse light effect in the LED down lamp, and experimental data is seen table 1 and is shown.

TABLE 1

It can be seen that the LED tube light uses the optical prism plate to adjust the light, which reduces the direct glare, but the light efficiency is reduced while the light extraction is not dazzled, so that the angle β is set between 5 ° and 25 ° to compromise UGR and light efficiency, thereby reducing UGR from 27.8 to 24.

As shown in fig. 17, which shows the internal structure of the second LED tube light of the present invention, in order to improve the optical efficiency, the second optical prism plate 305 is adopted in the LED tube light to replace the diffusion sheet 304 to control the light and then emit the light for illumination. In this LED downlight, the inside wall of the housing 301 is composed of a diffuse reflection housing wall 3011 and a specular reflection housing wall 3012, and the diffuse reflection housing wall 3011 and the specular reflection housing wall 3012 are separated by an optical prism plate, which is an LED deep-flush downlight. The LED deep-embedded tube lamp separately uses the optical prism plate to control light emitted from the LED unit 302 and then emits light for illumination, specifically, a part of the light emitted from the LED unit 302 directly irradiates the optical prism plate to control light, and the other part of the light is diffusely reflected by the diffuse reflection casing wall 3011 to the optical prism plate. After the light is controlled by the optical prism plate, one part of the emergent light is directly illuminated, and the other part of the emergent light is reflected by the mirror reflection shell wall 3012 and illuminated.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. An optical prism plate, comprising a plate main body (10), wherein the plate main body (10) has a first side surface (101) and a second side surface (102) which are opposite to each other, and the optical prism plate is characterized by further comprising a plurality of optical microstructures (11), wherein a first end of each optical microstructure (11) is connected to the first side surface (101), a second end of each optical microstructure (11) is a free end, the second side surface (102) is a plane, a bottom surface of each optical microstructure (11) connected to the first side surface (101) is a regular triangle, a cross-sectional area of each optical microstructure (11) is gradually reduced in a direction from the first end to the second end, included angles formed by three edges of each optical microstructure (11) and the bottom surface of the regular triangle are beta, and beta is within a range of 5 degrees to 25 degrees.

2. The optical prism sheet according to claim 1,

the regular triangle bottom surfaces of any two adjacent optical microstructures (11) have a common edge.

3. The optical prism sheet according to claim 2,

each optical microstructure (11) is triangular pyramid-shaped; alternatively, each optical microstructure (11) is in the shape of a triangular pyramid.

4. The optical prism sheet according to claim 3,

the heights of the optical microstructures (11) are equal from the first end to the second end, and the height of each optical microstructure (11) is smaller than the thickness of the plate body (10).

5. The optical prism sheet according to any one of claims 1 to 4,

the plate body (10) and the optical microstructure (11) are made of glass, polymethyl methacrylate, polycarbonate, polystyrene, polyethylene terephthalate or polypropylene.

6. An LED panel lamp is characterized by comprising a lamp housing (201), an LED light source (202), a light guide plate (203), a light reflecting plate (204), a first optical prism plate (205), a diffusion plate (206) and a driver, wherein the lamp housing (201) is provided with an assembly space and a light outlet, the LED light source (202), the light guide plate (203), the light reflecting plate (204) and the diffusion plate (206) are all arranged in the assembly space, the first optical prism plate (205) is assembled at the light outlet, the light guide plate (203) is provided with a light outlet surface, a back surface and a light inlet side surface, the LED light source (202) is arranged on the light inlet side surface, the light reflecting plate (204) is attached to the back surface, the diffusion plate (206) is arranged between the light guide plate (203) and the first optical prism plate (205), and the light outlet surface faces the diffusion plate (206), the LED light source (202) is electrically connected to the driver, wherein the first optical prism sheet (205) is an optical prism sheet according to any one of claims 1 to 5.

7. An LED tube lamp is characterized by comprising a shell (301), an LED unit (302), an energy supply device (303), a diffusion sheet (304) and a second optical prism sheet (305), the housing (301) has an accommodation space and an exit port, the LED unit (302) and the energy supply device (303) are mounted in the accommodation space, the second optical prism plate (305) is mounted to the exit port, the diffuser sheet (304) is fitted between the LED unit (302) and the second optical prism plate (305), the diffusion sheet (304) is connected with the shell (301), an air gap is formed between the diffusion sheet (304) and the second optical prism plate (305), the LED unit (302) is electrically connected with the energy supply device (303), wherein the second optical prism sheet (305) is the optical prism sheet of any one of claims 1 to 5.

8. An LED down lamp, characterized in that, including casing (301), LED unit (302), energy supply device (303) and second optical prism board (305), casing (301) has accommodation space and exit port, LED unit (302), energy supply device (303) are all installed the accommodation space, second optical prism board (305) install in the exit port, LED unit (302) with energy supply device (303) electric connection, wherein, second optical prism board (305) is the optical prism board of any one of claims 1-5.