CN114278908B

CN114278908B - Lamp set

Info

Publication number: CN114278908B
Application number: CN202111605749.5A
Authority: CN
Inventors: 杨凯栋; 张德峰; 梁有庆; 胡红
Original assignee: Guangdong Unilumin Energy Savings Technology Co ltd
Current assignee: Guangdong Unilumin Energy Savings Technology Co ltd
Priority date: 2021-12-25
Filing date: 2021-12-25
Publication date: 2024-04-12
Anticipated expiration: 2041-12-25
Also published as: CN114278908A

Abstract

The invention relates to a lamp, which comprises a shell, wherein a structural cavity with an opening is arranged on the shell, and a reflecting layer is arranged on the inner wall of the structural cavity; the light source piece is arranged on the inner wall of the structural cavity; the transparent medium is arranged at the opening of the shell; the edge of one side of the transparent medium, which is close to the light source piece, is provided with a light-permeable diffuse reflection area. The light source part is arranged on the transparent medium, and the light source part is arranged on the transparent medium. The light emitted by the lamp is concentrated and uniform, and the lamp efficiency is high.

Description

Lamp set

Technical Field

The invention relates to the technical field of illumination, in particular to a lamp.

Background

With the development of lighting technology, in the lamp industry, higher requirements are put on the lamp efficiency of the lamp. The lamp efficiency refers to the ratio of the light flux value emitted by the lamp measured under the specified condition to the sum of the light flux measurement values emitted by all the light sources in the lamp, and can reflect the loss degree of the light energy from the light sources to the light energy in the process of exiting from the lamp.

For the lamp with the luminous element in the structural cavity of the shell, part of light rays entering the lamp structure can be absorbed, so that the luminous flux emitted by the lamp is reduced, and the efficiency of the lamp is reduced. In the conventional technology, reflective paper is generally arranged in the structural cavity of the housing, so that light originally incident into the structural cavity is reflected, and the efficiency of the lamp is improved.

However, the lighting uniformity of the lamp is poor.

Disclosure of Invention

Based on this, it is necessary to provide a lamp for solving the problem of poor illumination uniformity of the lamp.

A luminaire, comprising:

the shell is provided with a structural cavity with an opening, and the inner wall of the structural cavity is provided with a reflecting layer;

the light source piece is arranged on the inner wall of the structural cavity;

a transparent medium arranged at the opening of the shell; the edge of one side of the transparent medium, which is close to the light source piece, is provided with a light-permeable diffuse reflection area.

In one embodiment, the light transmittance T of the light-permeable diffuse reflection area is in the range of: t is more than or equal to 50% and less than 100%.

In one embodiment, the surface of the light-permeable diffuse reflection area, which is close to the light source piece, is a frosted surface.

In one embodiment, the light-permeable diffuse reflection area is arranged in a central symmetry manner by taking the center of the transparent medium as the symmetry center.

In one embodiment, the light-permeable, diffuse reflective region is an annular light-permeable, diffuse reflective region.

In one embodiment, the edge of the side of the shell, on which the light source piece is arranged, is provided with a reflecting piece, and the reflecting piece is provided with an arc-shaped reflecting surface.

In one embodiment, the center of the arc-shaped reflecting surface of the reflecting piece is positioned in the light-permeable diffuse reflecting area.

In one embodiment, the end of the light-permeable diffuse reflection area near the center of the transparent medium coincides with the center of the reflector.

In one embodiment, the light source member includes a light source and a lens, the lens is disposed outside the light source, and the lens is used for homogenizing the light emitted by the light source member.

In one embodiment, at least one of the surfaces of the transparent medium facing and facing away from the light source member is provided with a light-transmitting layer.

According to the lamp, the light-permeable diffuse reflection area is arranged through the transparent medium, so that light rays with large angles generated by the light source part can be irradiated to the light reflection layer to be reflected to the light-permeable diffuse reflection area, part of the light rays are diffusely reflected by the light-permeable diffuse reflection area, after the reflection angle of the light rays is changed, the light rays are incident to the middle transparent area of the transparent medium at a small angle through the reflection effect of the light reflection layer, and are emitted to the outside. Thereby converting the light with large angle into the light with small angle, and leading the light to be uniformly emergent. And part of light rays passing through the light-permeable diffuse reflection area are totally reflected in the light-permeable diffuse reflection area until the emergent angle of the light rays is converted into a smaller angle, and the light rays can be emergent to the outside of the transparent medium.

The light emitted by the light source part and irradiated to the reflecting layer at a larger angle can be emitted by the lamp, and the light is emitted at a smaller angle basically when emitted to the outside of the transparent medium through the diffuse reflection of the light-permeable diffuse reflection area and the total reflection in the transparent medium, so that the light emitted by the lamp is concentrated and uniform.

Drawings

FIG. 1 is a schematic diagram of a first type of light path of a lamp according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a second type of light path of a lamp according to an embodiment of the present invention;

FIG. 3 is a schematic view of a third type of light path of a lamp according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a fourth type of light path of a lamp according to an embodiment of the present invention;

FIG. 5 is a schematic view of a fifth type of light path of a lamp according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a lamp according to another embodiment of the present invention;

fig. 7 is a schematic structural diagram of a lamp according to another embodiment of the invention.

Reference numerals:

100. a housing; 101. an opening; 110. a structural cavity; 120. a light reflecting layer; 130. a reflecting member; 200. a light source member; 210. a light source; 220. a lens; 221. a planar section; 222. a curved surface section; 223. a platform section; 230. a PCB board; 300. a transparent medium; 310. a light-transmitting layer; 400. light-permeable diffuse reflective regions.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a lamp according to an embodiment of the invention. The lamp provided by an embodiment of the invention comprises a housing 100, a light source 200 and a transparent medium 300.

Therein, as shown in fig. 1-7, the housing 100 is provided with a structural cavity 110 having an opening 101. The inner wall of the structural cavity 110 is provided with a light reflecting layer 120. The inner wall of the structural cavity 110 is provided with a light source member 200. The light source member 200 may generate light. Most of the light rays are emitted to the outside of the lamp through the opening 101 of the structural cavity 110 directly at a small angle (the included angle between the light rays and the direction perpendicular to the plane of the opening 101 is smaller than 80 °) so as to illuminate. A small portion of the light is incident on the inner wall of the structural cavity 110 at a large angle (an included angle greater than or equal to 80 ° from a direction perpendicular to the plane of the opening 101), and then is reflected toward the opening 101 of the structural cavity 110 by the reflective effect of the reflective layer 120.

The transparent medium 300 is disposed at the opening 101 of the housing 100. Light may pass through the transparent medium 300 to illuminate the exterior of the luminaire. The edge of the transparent medium 300 facing the light source member 200 is provided with a light-transmissible diffuse reflection area 400. What needs to be explained here is: light-transmissible and diffusely reflective region 400 means that a small portion of light may pass through the region while light may diffusely reflect at the region. That is, although the light-permeable diffuse reflection area 400 may diffusely reflect light, the light is not totally diffusely reflected, i.e., a portion of the light may pass through the light-permeable diffuse reflection area 400 into the transparent medium 300. By the arrangement, the diffuse reflection of the light in the light-permeable diffuse reflection area 400 can be realized, meanwhile, certain light transmittance is maintained, and the lamp efficiency of the lamp is improved.

As shown in fig. 1, the light rays of a small angle may be directly incident on a portion of the light-transmissible diffuse reflection area 400 of the transparent medium 300 and refracted out of the transparent medium 300 at a small angle.

As shown in fig. 2, a portion of the high-angle light may directly enter the light-permeable diffuse reflection area 400, and the rest of the high-angle light enters the light-reflecting layer 120 and is reflected to the light-permeable diffuse reflection area 400.

Of the light rays incident on the light-transmittable diffuse reflection area 400:

as shown in fig. 3, most of the light is diffusely reflected there and towards the side of the transparent medium 300 close to the light source member 200 to change the angle of light exiting to the reflective layer 120, so that the light is conveniently emitted to the outside of the lamp from the transparent medium 300 at a smaller exit angle. For ease of understanding, the incident angle and the exit angle are referred to for illustration. The incident angle is the angle between the incident light and the normal line of the incident surface, and the exit angle is the angle between the emergent light and the normal line of the incident surface.

Wherein, a portion of the light (e.g., light a in the figure) incident on the light reflecting layer 120 at a smaller incident angle can exit from the middle of the transparent medium 300 at a smaller angle by the reflection of the light reflecting layer 120. Some of the light incident on the light reflecting layer 120 at a smaller incident angle is continuously reflected by the light reflecting layer 120 to the light-transmissible diffuse reflection area 400, and is continuously diffusely reflected, so that the above-mentioned process is repeated.

As shown in fig. 4 and 5, the remaining small portion of the light passes through the light-transmissible diffuse reflection area 400 and enters the transparent medium 300.

Let the refractive index of the transparent medium 300 be n ₁ The side of the transparent medium 300 close to the light source and the side of the transparent medium 300 far from the light source are all air, and the refractive indexes of the air are all n ₂ At this time, θ _c =arcsin(n ₂ /n ₁ ) Thus, when the incident angle θ of the light in the transparent medium 300>θ _c Light is continuously reflected in the transparent medium 300 without refraction. I.e. total reflection.

As shown in FIG. 4, if the exit angle of the light is smaller than the critical angle θ of the transparent medium 300 _c When the light is refracted out of the transparent medium 300 and exits to the outside of the lamp (as light b in the figure), or the light is refracted to the outside of the lamp after being diffusely reflected at the light-permeable diffuse reflection area 400 (as light c in the figure). As shown in FIG. 5, if the exit angle of the light is larger than the critical angle θ of the transparent medium 300 _c When this light is totally reflected inside the transparent medium 300.

As shown in fig. 5, when the light is totally reflected in the transparent medium 300, the light is reflected to another light-permeable diffuse reflection area 400 (e.g. light d) or is reflected back to the original light-permeable diffuse reflection area 400 (e.g. light e) to perform the next diffuse reflection or refraction, so that the angle of the exit angle of the light can be changed. When the light is changed to exit at a small angle, the light can exit to the transparent medium 300. Some of the light rays can directly exit from the side of the transparent medium 300 away from the light source 200 (e.g., f ray and g ray in the figure). Another portion of the light may be emitted from the side of the transparent medium 300 near the light source 200 to the reflective layer 120 (such as h light in the figure). The light emitted from the light reflecting layer 120 may be directly emitted to a side of the transparent medium 300 away from the light source member 200 (i rays in the figure) at a small angle, or return to the light-permeable diffuse reflection area 400 for a new diffuse reflection.

Through the arrangement, light rays with smaller angles can be directly emitted out of the transparent medium 300, light rays with larger angles are converted into light rays with smaller angles to be emitted, meanwhile, absorption damage of the light rays can be reduced, and the efficiency of the lamp is improved.

Specifically, in some embodiments, the housing 100 may be a metal substrate, such as an aluminum alloy substrate, or a substrate made of other materials. The inner wall of the structural cavity 110 of the housing 100 may be provided with a light reflecting layer 120. The retroreflective layer 120 may be a spray or a plating arrangement. In some embodiments, the light reflecting layer 120 may be an ink layer. In the illustrated embodiment, the retroreflective layer 120 is an ink layer of white pigment, which may be selected to be solar white. The above arrangement can make the housing 100 have a better heat dissipation effect and a certain light reflection effect, so that the light emitted by the light source component 200 and irradiated to the inner wall of the structural cavity 110 can be reflected to a certain extent, so that the light is convenient to emit, and the efficiency of the lamp is improved.

As shown in fig. 1 to 7, in some embodiments, an edge of a side of the housing 100 where the light source member 200 is disposed may be provided with a reflecting member 130. The reflective member 130 is arranged to make the light reflected by the reflective member have a better reflection effect and reduce the light loss. In some embodiments, the reflective member 130 may be a reflective paper having a relatively high reflectivity. In other embodiments, the reflective member 130 may also be a reflective film layer. The reflective film layer may be coated or plated on the inner walls of the structural cavity 110.

In some embodiments, a side surface of the reflecting member 130 remote from the housing 100 may be an arc-shaped reflecting surface. The arrangement can make the reflecting member 130 reflect more light to the light-permeable diffuse reflection area 400 when reflecting the light emitted by the light source member 200, so as to change the light path, so that the light with a larger angle is converted into the light with a smaller angle and is emitted to the outside of the lamp.

As shown in fig. 1-7, in some embodiments, the cross-sectional shape of the reflector 130 may be circular arc-shaped. That is, a side surface of the reflecting member 130 remote from the housing 100 is a circular arc-shaped reflecting surface. In the illustrated embodiment, the cross-sectional shape of the reflector 130 may be a quarter circular arc. The center of the circular arc-shaped reflecting surface of the reflecting member 130 may be located on a side plane of the transparent medium 300 adjacent to the light source member 200. This arrangement can make the light emitted from the light source 200 incident on the surface of the reflecting member 130 at a larger angle reflect as much as possible to the light-permeable diffuse reflection area 400. In other embodiments, the cross-sectional shape of the reflector 130 may also be wavy or arcuate, etc.

In some embodiments, a side surface of the reflecting member 130 remote from the housing 100 may also be planar. Can be adjusted according to the actual situation. The cross-sectional shape of the reflecting member 130 may be linear, L-shaped, stepped, or the like.

In some embodiments, as shown in fig. 1-7, a partially reflective member 130 may be provided where the transparent medium 300 abuts the opening 101 of the structural cavity 110. That is, the reflecting member 130 may extend to the junction of the transparent medium 300 and the opening 101. By the arrangement, light rays can be reflected well after moving to the edge of the transparent medium 300 in the total reflection process, so that light loss is reduced, and the efficiency of the lamp is increased.

The above-mentioned housing 100 can increase the reflection effect of the light in the structural cavity 110 by the reflective layer 120 and the reflective member 130, and reduce the loss, thereby increasing the efficiency of the lamp.

As shown in fig. 1-7, in some embodiments, the light source 200 may be connected to the PCB 230, so that the light source 200 may emit light of different colors and intensities. The PCB 230 may be embedded in the housing 100, or may be installed between the housing 100 and the light source 200, and may be adjusted according to practical situations.

The number of the light-emitting sources 210 in the light source member 200 may be one or a plurality. If the number of the light emitting sources 210 is plural, the plural light emitting sources 210 may be disposed at intervals, so that the emitted light is relatively uniform.

As shown in fig. 1-7, in some of these embodiments, a lens 220 is disposed external to the luminescent light source 210. The lens 220 may be used to uniformly emit light from the light source 210. In some embodiments, lens 220 increases in thickness in the direction from the middle to the edges of illumination source 210. By the arrangement, more light rays emitted by the middle part of the luminous light source 210 can be dispersed under the action of the lens 220, so that the whole luminous light source 210 emits light uniformly, and glare is reduced.

As shown in fig. 6 and 7, in some embodiments, the lens 220 may include a planar segment 221, a curved segment 222, and a land segment 223 along the middle-to-edge direction of the light-emitting source 210. The plane of the planar segment 221, which is remote from the light emitting source 210, may be parallel to the plane of the transparent medium 300. The surface of the curved surface segment 222 away from the light emitting source 210 is a curved surface, which may be a cambered surface. The distance between the curved surface section 222 and the middle of the light-emitting source 210 gradually increases along the direction from the flat surface section 221 to the flat surface section 223. The land section 223 forms a stepped structure parallel to the transparent medium 300. The above arrangement can make the light emitted by the light source 210 more uniform, and reduce glare.

In some embodiments, as shown in fig. 7, for a lamp with only one light-emitting source 210 and lens 220, the incident angle is considered to be larger than the light (the light with the incident angle α in the figure) that is emitted from the side of the curved surface section 222 near the platform section 223 to the edge of the light-permeable diffuse reflection area 400 near the middle of the transparent medium 300, and is the light with the large angle. The light rays with incidence angles smaller than or equal to those of the edges of the curved surface section 222, which are close to the middle of the transparent medium 300, and which are emitted to the light-permeable diffuse reflection area 400 from the side of the curved surface section 222, which is close to the platform section 223, are small-angle light rays. The large-angle light can be reflected to the light-permeable diffuse reflection area 400 by the reflecting piece 130 and change the light path, or can be directly irradiated to the light-permeable diffuse reflection area 400 to change the light path, so that the large-angle light is finally converted into the small-angle light to be emitted when being emitted by the transparent medium 300, and the uniformity and the efficiency of the lamp are improved.

For example, in the embodiment shown in fig. 7, the incident angle of the light rays exiting from the side of the curved surface section 222 near the land section 223 to the edge of the light-permeable diffuse reflection area 400 near the middle of the transparent medium 300 is 71 °. Therefore, in this embodiment, it can be considered that the large angle light is greater than 71 ° and the small angle light is equal to or less than 71 °.

In other embodiments, for a lamp with two or more light sources 210 and corresponding lenses 220, the high-angle light and the low-angle light can be defined according to the above criteria; the light rays with larger angles and larger angles than or equal to 80 degrees can be selected, and the light rays with smaller angles and smaller angles can be selected. When the two defined criteria are different, the latter may be used.

The material of the lens 220 can be adjusted according to the actual situation. In some embodiments, the lens 220 may be made of PMMA (polymethyl methacrylate ). In some other embodiments, the lens 220 may be made of glass. The material of the lens 220 may be adjusted according to the actual situation.

The light source 200 can generate light and uniformly emit light through the lens 220, so that glare is reduced, and the lamp has better effect in the use process.

In some embodiments, the transparent medium 300 may be glass, or may be made of other materials, such as PC (Polycarbonate). The transparent medium 300 is disposed at the opening 101 of the housing 100. The transparent medium 300 and the housing 100 may be fastened, screwed or otherwise connected, and may be selected according to practical situations.

In some other embodiments, as shown in fig. 6, at least one of the surfaces of the transparent medium 300 that are close to and far from the light source member 200 may be provided with at least one light-transmitting layer 310. The material of the transparent layer 310 and the transparent medium 300 may be different. The material of the transparent layer 310 is different from that of the transparent medium 300. The arrangement can change the refraction angle of light rays when the light rays are refracted out of the transparent medium 300 by increasing or decreasing the light-transmitting layer 310 and changing the light-transmitting layers 310 made of different materials, so that the irradiation range of the lamp is adjusted.

The transparent medium 300 is provided with a light-transmissible diffuse reflection area 400 at one side thereof adjacent to the light source member 200. Wherein the light-transmissible diffuse reflection area 400 may be disposed at an edge of the transparent medium 300. The arrangement can prevent the small-angle emergent ray from being influenced in the process of adjusting the angle of part of the large-angle emergent ray.

In some embodiments, the light transmittance T of the light-permeable diffuse reflection area 400 is in the range of: t is more than or equal to 50% and less than 100%. For example, the light transmittance of the light-transmittable diffuse reflection area 400 is 50%, 60%, 70%, 80%, 85%, 90%, 95%, or the like. When the light transmittance T of the light-permeable diffuse reflection area 400 is within the above range, the light-permeable diffuse reflection area 400 has a diffuse reflection effect on light, and meanwhile, part of the light can be emitted through the light-permeable diffuse reflection area 400, so that the lamp efficiency of the lamp is higher.

In some embodiments, the surface of the light-transmissive diffuse reflection area 400 adjacent to the light source member 200 is frosted. The frosted surface may provide the light-transmissible and diffuse reflective region 400 with a diffuse reflective effect. That is, when light is incident on the frosted surface, diffuse reflection can be performed.

In some embodiments, the light-permeable diffuse reflection area 400 may be formed by attaching a diffuse reflection film, or may be obtained by performing local frosting treatment on the surface of the transparent medium 300. The edge of the transparent medium 300 near the side of the light source member 200 may be formed with the light-transmissible diffuse reflection area 400 in any of the above-described manners.

In some embodiments, the light-transmissive diffuse reflective region 400 may be in the same plane as the surface of the transparent medium 300 adjacent to the light source member 200, adjacent to the surface of the light source member 200. In other embodiments, the light-permeable diffuse reflection area 400 may protrude from the surface of the transparent medium 300 near the light source member 200 near the surface of the light source member 200. In other embodiments, the light-permeable diffuse reflective area 400 may be recessed from the surface of the transparent medium 300 adjacent to the light source member 200. The actual choice may be made according to the process. In addition, in the embodiment in which the transparent medium 300 is provided with the light-transmitting layer 310 on the side close to the light source member 200, the surface of the light-transmittable diffuse reflection area 400 close to the light source member 200 may be flush with the surface of the light-transmitting layer 310 close to the light source member 200.

The light-permeable diffuse reflection area 400 may have a regular shape or an irregular shape. In some of these embodiments, as in FIGS. 1-7, the light-permeable diffusionThe reflection area 400 is arranged in a central symmetry with the center of the transparent medium 300 as the center of symmetry. The above arrangement can make the light refracted into the transparent medium 300 by the light-permeable diffuse reflection area 400 and totally reflected in the transparent medium 300, and can make diffuse reflection to change its emergence angle when reaching the symmetrical light-permeable diffuse reflection area 400 part, so as to facilitate such light to be smaller than the critical angle theta _c The surface of the transparent medium 300 far from the light source member 200 is emitted and refracted out of the transparent medium 300 to illuminate the outside of the lamp.

In some embodiments, as shown in fig. 1-7, the light-permeable, diffuse reflective region 400 is annular in shape, i.e., is annular in shape. By the arrangement, more large-angle light rays reflected to the edge of the transparent medium 300 by the reflecting layer 120 or the reflecting piece 130 can be diffusely reflected, so that the emergent angle of the light rays from the transparent medium 300 is adjusted, and the effect of emergent light rays is good while the lamp efficiency of the lamp is high.

In some embodiments, the width of the annular light-transmissible diffuse reflective zone 400 (D in fig. 7) may be slightly greater than the width of the reflector 130. Here, the width of the light-permeable and diffuse reflection area 400 refers to the distance between the two side edges of the light-permeable and diffuse reflection area 400 along the outer portion to the middle portion of the transparent medium 300, which is exposed in the inner portion of the structural cavity 110 after the transparent medium 300 is mounted to the housing 100. The width of the reflecting member 130 refers to the distance between planes in which both ends of the reflecting member 130 are located in a direction in which the reflecting member 130 extends along the edge of the housing 100 to the middle of the housing 100. For example, in some embodiments, the width of the light-transmissive diffuse reflective region 400 is the same as the width of the reflective member 130. This arrangement allows more of the high angle light refracted by reflector 130 to exit light-permeable diffuse reflective area 400 for conversion.

In some embodiments, the distance (H in fig. 7) between the plane in which the light-permeable diffuse reflection area 400 is located near the side surface of the light source member 200 and the plane in which the bottom of the structural cavity 110 of the housing 100 is located away from the opening 101 may be equal to the width of the light-permeable diffuse reflection area 400. By such an arrangement, more light rays incident on the surface of the transparent medium 300, which is close to one side of the light source member 200, with a large angle can be emitted to the light-permeable diffuse reflection area 400, so that diffuse reflection, refraction or total reflection can be performed subsequently to convert into light rays with a smaller angle.

In other embodiments, the distance between the plane of the light-permeable diffuse reflection area 400 on the side surface close to the light source member 200 and the plane of the bottom of the structural cavity 110 of the housing 100 away from the opening 101 may be different from the width of the light-permeable diffuse reflection area 400. Can be adjusted according to the actual situation.

Through the arrangement of the light-permeable diffuse reflection area 400, the light which is incident to the reflecting piece 130 at a larger angle and is incident to the light-permeable diffuse reflection area 400 can be converted into the light with a small angle to be emitted by the transparent medium 300 in a mode of emitting the light with a small angle after diffuse reflection, refraction or total reflection, so that the efficiency of the lamp is improved, and meanwhile, the light with the small angle is increased, and the uniformity of the light emitted by the lamp is improved. And the light emitted by the light source 200 at a small angle is not affected.

In some embodiments, the range of the emergence angle after the high-angle light is converted into the low-angle light can be adjusted by changing the material of the transparent medium 300 and the range of the light-permeable diffuse reflection area 400. At least one surface of the transparent medium 300 may also be coated with the light-transmitting layer 310 during the process of changing the material of the transparent medium 300. The material of the transparent layer 310 is different from that of the transparent medium 300, so that the range of the emergence angle of the light can be further changed.

In addition, when the range of the light-permeable diffuse reflection area 400 is adjusted, not only the range of the emergence angle of the light ray can be changed, but also the maximum lighting angle of the lamp can be controlled, so that the glare is effectively restrained.

In a specific embodiment, the housing 100 may be an aluminum alloy substrate. The structural cavity 110 of the housing 100 is a similarly hemispherical structural cavity 110. The inner walls of the structural cavities 110 are coated with an ink layer of solar white pigment. The edge of the side of the housing 100 where the light source member 200 is disposed is provided with a reflecting member 130, and the reflecting member 130 is an annular reflecting member 130 disposed along the circumferential direction of the structural cavity 110. The reflecting member 130 is a reflecting paper. The side surface of the reflecting member 130 remote from the housing 100 may be an arc-shaped reflecting surface. The reflecting member 130 has a cross-sectional shape of a quarter circular arc. The center of the arc is located in the plane of the light-permeable diffuse reflection area 400. The light source member 200 is located at a side of the housing 100 remote from the opening 101 of the structural cavity 110.

In addition, glass may be used as the transparent medium 300. The transparent medium 300 is provided with a light-transmissible diffuse reflection area 400 of an annular shape at one side thereof adjacent to the light source member 200. The light-permeable diffuse reflection area 400 is made by a frosting process. The end of the light-permeable diffuse reflection area 400 near the center of the transparent medium 300 coincides with the center of the reflector 130. That is, the width of the light-permeable diffuse reflection area 400 is identical to the radius formed by the arc-shaped reflection surface of the reflection member 130. The distance between the plane of the light-permeable diffuse reflection area 400, which is located on the surface of the side close to the light source, and the plane of the bottom of the structural cavity 110 of the housing 100, which is located away from the opening 101, is equal to the width of the light-permeable diffuse reflection area 400, that is, equal to the radius formed by the arc-shaped reflecting surface of the reflecting member 130. For example, each may be 30mm. In some other embodiments, the value may be adjusted according to the actual situation.

The light-transmittable diffuse reflection area 400 is a light-transmittable diffuse reflection area 400 of a ring shape. The cross-sectional shape of the reflecting member 130 is a quarter circular arc. The radius of the circular arc is consistent with the length of the light-permeable diffuse reflection area 400, and the center of the circular arc is positioned on one side of the light-permeable diffuse reflection area 400, which is close to the transparent medium 300. That is, the width of the annular light-permeable diffuse reflection area 400 may be equal to the width of the reflector 130; the distance between the plane where the light-permeable diffuse reflection area 400 is located near the side surface of the light source member 200 and the plane where the bottom of the structural cavity 110 of the housing 100 is located far from the opening 101 is equal to the width of the light-permeable diffuse reflection area 400.

The lamp converts the large-angle light into the small-angle light and uniformly emits the small-angle light while having higher lamp efficiency, so that the uniformity of the light emitted by the lamp is better. In addition, the glare degree of the lamp is low.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. A light fixture, comprising:

the light source piece is arranged on the inner wall of the structural cavity;

a transparent medium arranged at the opening of the shell; the edge of one side of the transparent medium, which is close to the light source piece, is provided with a light-permeable diffuse reflection area, and the light-permeable diffuse reflection area is an annular light-permeable diffuse reflection area; the surface of the light-permeable diffuse reflection area, which is close to the light source piece, is a frosted surface, and the light-permeable diffuse reflection area is arranged in a central symmetry way by taking the center of the transparent medium as a symmetry center; the edge of one side of the shell, provided with the light source component, is provided with a reflecting component, and the reflecting component is provided with an arc reflecting surface;

the light rays are emitted to the outside of the transparent medium at a small angle through the diffuse reflection of the light-permeable diffuse reflection area and the total reflection of the transparent medium.

2. A light fixture as recited in claim 1, wherein the light transmittance T of the light-transmissible and diffusely reflective region is in the range of: t is more than or equal to 50% and less than 100%.

3. A light fixture as recited in claim 1, wherein a distance between a plane in which said light-transmittable diffuse reflection area is located adjacent to a side surface of said light source element and a plane in which said structural cavity is located away from a bottom of said opening is equal to a width of said light-transmittable diffuse reflection area.

4. A light fixture as recited in claim 1, wherein a center of an arcuate reflective surface of said reflective element is located within said light-transmissible and diffusely reflective region.

5. A light fixture as recited in claim 4, wherein an end of said light-permeable diffuse reflection region which is adjacent to a center of the transparent medium coincides with a center of said reflector.

6. A light fixture as recited in claim 1, wherein said light source element comprises a light source and a lens, said lens being disposed outside said light source, said lens being adapted to homogenize light emitted by said light source element.

7. A luminaire as claimed in any one of claims 1 to 6, characterized in that at least one of the surfaces of the transparent medium facing and facing away from the light source element is provided with a light-transmitting layer.